Patent Publication Number: US-11394503-B2

Title: Communication control device, communication control method, and program

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. application Ser. No. 15/325,836, filed Jan. 12, 2017, which is based on PCT filing PCT/JP2015/066824, filed Jun. 11, 2015, which claims priority to JP 2014-173848, filed Aug. 28, 2014, the entire contents of each are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a communication control device, a communication control method, and a program. 
     BACKGROUND ART 
     In recent years, a radio system which transmits information via radio communication is used in various situations. The radio system includes, for example, a cellular system, a satellite broadcasting system, a wireless local area network (LAN) system, a TV broadcasting system, a radio broadcasting system, or the like. There is a case where, in such radio systems, in the case where frequency bands utilized overlap with each other, radio transmission interferes with each other. It is therefore desire to provide a technology for avoiding interference among different radio systems. 
     For example, the following Patent Literature 1 discloses a technology of avoiding a primary system from being fatally interfered in the case where there are a plurality of secondary systems upon secondary utilization of a frequency band. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: JP 2012-151815A 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     Nowadays, as a radio system becomes widespread and is utilized more densely, it is desired to further improve a technology for avoiding interference among radio systems. Therefore, the present disclosure proposes new and improved communication control device, communication control method and program which can reduce interference caused among different radio systems. 
     Solution to Problem 
     According to the present disclosure, there is provided a communication control device including: a communication unit configured to communicate with an apparatus belonging to a first radio network; and a control unit configured to control whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     According to the present disclosure, there is provided a communication control method including: communicating with an apparatus belonging to a first radio network; and controlling whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     According to the present disclosure, there is provided a program causing a computer to function as: a communication unit configured to communicate with an apparatus belonging to a first radio network; and a control unit configured to control whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     Advantageous Effects of Invention 
     As described above, according to the present disclosure, it is possible to reduce interference caused among different radio systems. Note that the effects described above are not necessarily limitative. With or in the place of the above effects, there may be achieved any one of the effects described in this specification or other effects that may be grasped from this specification. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an explanatory diagram for explaining outline of a communication system according to an embodiment of the present disclosure. 
         FIG. 2  is a block diagram illustrating an example of a logical configuration of a receiving station according to the present embodiment. 
         FIG. 3  is a block diagram illustrating an example of a logical configuration of a transmitting station according to the present embodiment. 
         FIG. 4  is an explanatory diagram for explaining an example of a frequency hopping pattern in a radio system to be controlled according to the present embodiment. 
         FIG. 5  is an explanatory diagram for explaining an example of a frequency hopping pattern in a radio system to be controlled according to the present embodiment. 
         FIG. 6  is an explanatory diagram for explaining an example of a frequency hopping pattern in a radio system to be controlled according to the present embodiment. 
         FIG. 7  is an explanatory diagram for explaining an example of a functional configuration of a communication unit of the transmitting station according to the present embodiment. 
         FIG. 8  is an explanatory diagram for explaining an example of a functional configuration of a communication unit of the transmitting station according to the present embodiment. 
         FIG. 9  is an explanatory diagram for explaining an example of a functional configuration of a communication unit of the transmitting station according to the present embodiment. 
         FIG. 10  is an explanatory diagram for explaining an example of a functional configuration of a communication unit of the transmitting station according to the present embodiment. 
         FIG. 11  is an explanatory diagram for explaining an example of relationship between a control channel and a data channel in frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 12  is an explanatory diagram for explaining an example of relationship between a control channel and a data channel in frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 13  is an explanatory diagram for explaining an example of relationship between a control channel and a data channel in frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 14  is an explanatory diagram for explaining an example of relationship between a header portion and a data portion in the frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 15  is an explanatory diagram for explaining an example of the frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 16  is an explanatory diagram for explaining an example of the frequency hopping setting information notification processing according to the present embodiment. 
         FIG. 17  is an explanatory diagram for explaining relationship between frequency hopping setting information notification means and channels according to the present embodiment. 
         FIG. 18  is a block diagram illustrating an example of a logical configuration of a communication control device according to the present embodiment. 
         FIG. 19  is an explanatory diagram for explaining an example of priority of radio systems in the present embodiment. 
         FIG. 20  is an explanatory diagram for explaining an example of priority of radio systems in the present embodiment. 
         FIG. 21  is an explanatory diagram for explaining an example of priority of radio systems in the present embodiment. 
         FIG. 22  is an explanatory diagram for explaining temporal change of use frequency bands by the radio system according to the present embodiment. 
         FIG. 23  is an explanatory diagram for explaining temporal change of use frequency bands by the radio system according to the present embodiment. 
         FIG. 24  is an explanatory diagram for explaining an example of calculation of a ratio of overlapping of use frequency bands. 
         FIG. 25  is an explanatory diagram for explaining an example of calculation of a ratio of overlapping of use frequency bands. 
         FIG. 26  is an explanatory diagram for explaining an example of calculation of a ratio of overlapping of use frequency bands. 
         FIG. 27  is an explanatory diagram for explaining an example of calculation of a ratio of overlapping of use frequency bands. 
         FIG. 28  is an explanatory diagram for explaining an example of a frequency hopping pattern in the radio system to be controlled according to the present embodiment. 
         FIG. 29  is an explanatory diagram for explaining an example of a frequency hopping pattern in the radio system to be controlled according to the present embodiment. 
         FIG. 30  is an explanatory diagram for explaining an example where use frequency bands of two radio systems partially overlap with each other. 
         FIG. 31  is an explanatory diagram for explaining an example where use frequency bands of two radio systems partially overlap with each other. 
         FIG. 32  is a block diagram illustrating an example of a logical configuration of a DB according to the present embodiment. 
         FIG. 33  is a block diagram illustrating an example of a logical configuration of a sensor apparatus according to the present embodiment. 
         FIG. 34  is a sequence diagram illustrating an example of flow of radio system control processing executed in the communication system according to the present embodiment. 
         FIG. 35  is a sequence diagram illustrating an example of flow of radio system control processing executed in the communication system according to the present embodiment. 
         FIG. 36  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 37  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 38  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 39  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 40  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 41  is a flowchart illustrating an example of flow of processing of calculating a ratio of overlapping of use frequency bands executed in the communication control device according to the present embodiment. 
         FIG. 42  is a flowchart illustrating an example of flow of operation mode decision processing executed in the communication control device according to the present embodiment. 
         FIG. 43  is a flowchart illustrating an example of flow of network information acquisition processing executed at the communication control device according to the present embodiment. 
         FIG. 44  is a flowchart illustrating an example of flow of interference determination processing executed at the communication control device according to the present embodiment. 
         FIG. 45  is a flowchart illustrating an example of flow of overlapping determination processing of use frequency bands executed at the communication control device according to the present embodiment. 
         FIG. 46  is a flowchart illustrating an example of flow of overlapping determination processing of use frequency bands executed at the communication control device according to the present embodiment. 
         FIG. 47  is a flowchart illustrating an example of flow of overlapping determination processing of use frequency bands executed at the communication control device according to the present embodiment. 
         FIG. 48  is a flowchart illustrating an example of flow of temporal change determination processing of a use frequency band executed at the communication control device according to the present embodiment. 
         FIG. 49  is a flowchart illustrating an example of flow of temporal change determination processing of a use frequency band executed at the communication control device according to the present embodiment. 
         FIG. 50  is a flowchart illustrating an example of flow of frequency hopping setting information decision processing executed at the communication control device according to the present embodiment. 
         FIG. 51  is a flowchart illustrating an example of flow of frequency hopping setting information decision processing executed at the communication control device according to the present embodiment. 
         FIG. 52  is a flowchart illustrating an example of flow of frequency hopping pattern decision processing executed at the communication control device according to the present embodiment. 
         FIG. 53  is a sequence diagram illustrating an example of flow of DB registration information registration processing executed at the communication system according to the present embodiment. 
         FIG. 54  is a flowchart illustrating an example of flow of processing of transmitting information indicating a frequency hopping pattern executed at the communication control device according to the present embodiment. 
         FIG. 55  is a flowchart illustrating an example of flow of transmission setting switching processing executed at a transmitting station according to the present embodiment. 
         FIG. 56  is a block diagram illustrating an example of a schematic configuration of a server. 
         FIG. 57  is a block diagram illustrating a first example of a schematic configuration of an eNB. 
         FIG. 58  is a block diagram illustrating a second example of the schematic configuration of the eNB. 
         FIG. 59  is a block diagram illustrating an example of a schematic configuration of a smartphone. 
         FIG. 60  is a block diagram illustrating an example of a schematic configuration of a car navigation device. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, a preferred embodiment of the present disclosure will be described in detail with reference to the appended drawings. In this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted. 
     Also, in this specification and the appended drawings, elements having substantially the same function and structure may in some cases be distinguished by different letters appended to the same sign. For example, multiple elements having substantially the same function and structure are distinguished as receiving stations  100 A,  100 B,  100 C, and so on as appropriate. On the other hand, when not particularly distinguishing each of multiple elements having substantially the same function and structure, only the same sign will be given. For example, the receiving stations  100 A,  100 B,  100 C will be simply designated as the receiving station  100  when not being particularly distinguished. 
     Note that description will be provided in the following order. 
     1. Outline 
     2. Configuration example 
     2-1. Receiving station 
     2-2. Transmitting station 
     2-3. Communication control device 
     2-4. DB 
     2-5. Sensor apparatus 
     3. Operation processing 
     3-1. Radio system control processing 
     3-2. Operation mode decision processing 
     3-3. Network information acquisition processing 
     3-4. Interference determination processing 
     3-5. Overlapping determination processing of use frequency bands 
     3-6. Temporal change determination processing of use frequency band 
     3-7. Frequency hopping setting decision processing 
     3-8. DB registration information registration processing 
     3-9. Transmission setting switching processing 
     4. Application examples 
     5. Conclusion 
     1. Outline 
       FIG. 1  is an explanatory diagram for explaining outline of a communication system according to an embodiment of the present disclosure. As illustrated in  FIG. 1 , a communication system  1  according to the present embodiment includes a plurality of radio systems  10 . 
     Each radio system  10  includes one or more receiving stations  100  and one or more transmitting stations  200 . The receiving station  100  is a radio communication apparatus which receives data transmitted from the transmitting station  200 . More accurately, the receiving station  100  is a radio communication apparatus which receives data which is transmitted from the transmitting station  200  while frequency hopping is performed. For example, the receiving station  100  is a user terminal (user equipment (UE)) in a cellular system, a client apparatus in a wireless LAN system or a TV receiver in a terrestrial broadcasting system or a satellite broadcasting system. The transmitting station  200  is an apparatus which transmits data to the receiving station  100 . More accurately, the transmitting station  200  is an apparatus which transmits data to the receiving station  100  while performing frequency hopping. For example, the transmitting station  200  is a base station (evolutional Node B (eNB)) in a cellular system, a base station (access point) in a wireless LAN system, a tower in a terrestrial broadcasting system or a satellite in a satellite broadcasting system. Note that there is a case where one apparatus functions as one of the receiving station  100  and the transmitting station  200  or a case where one apparatus functions as both the receiving station  100  and the transmitting station  200 . For example, the UE can function as the receiving station  100  which receives data from the eNB in downlink and can function as the transmitting station  200  which transmits data to the eNB in uplink. 
     Here, as illustrated in  FIG. 1 , the communication system  1  according to the present embodiment includes a plurality of different radio systems  10 . 
     For example, a radio system  10 A is a cellular system complying with LTE, LTE-Advanced or a communication scheme equivalent to these. The radio system  10 A includes one or more receiving stations  100  (that is, a receiving station  100 A and a receiving station  100 B), a transmitting station  200 A and a core network  600 . In the example illustrated in  FIG. 1 , the receiving stations  100 A and  100   b  are UEs, and the transmitting station  200  is an eNB. There may be a relay node or small cell (including a femtocell, a nano cell, a pico cell, a micro cell, or the like) base station between the UE  100  and the eNB  200 . Further, the eNB  200  may function as a macro cell base station, and the UE  100  may function as a small cell base station. The core network  600  can include a communication node such as a router, a mobility management entity (MME), a serving gateway (S-GW), a packet data network gateway (P-GW), a policy and charging rule function (PCRF) and a home eNodeB gateway (HeNB-GW). Note that, inversely with the example illustrated in  FIG. 1 , the UE may function as the transmitting station  200 , and the eNB may function as the receiving station  100 . 
     For example, the radio system  10 B is a satellite broadcasting system. The radio system  10 B includes one or more receiving stations  100  (that is, a receiving station  100 C and a receiving station  100 D), and a transmitting station  200 B. In the example illustrated in  FIG. 1 , the receiving stations  100 C and  100 D are TV receivers, and the transmitting station  200  is a satellite. Note that, inversely with the example illustrated in  FIG. 1 , the TV receiver may function as the transmitting station  200 , and the satellite may function as the receiving station  100 . 
     The communication system  1  can include an arbitrary radio system such as, for example, a wireless LAN system, a TV broadcasting (terrestrial broadcasting) system, a radio broadcasting system and a radar system, other than the examples illustrated in  FIG. 1 . 
     There is a case where use frequency bands overlap with each other among the plurality of radio systems  10  included in the communication system  1 . Overlapping of the frequency bands can occur, for example, in the case where, as in TV white space, a frequency band assigned to the TV broadcasting system is secondarily utilized by another radio system  10  with low priority. Secondary utilization of the frequency refers to secondary utilization of part or all of frequency channels preferentially assigned to one system, by another system. Typically, a system to which a frequency channel is preferentially assigned is referred to as a primary system, and a system which secondarily utilizes the frequency channel is referred to as a secondary system. Secondary utilization of a frequency has been discussed as one of measures for mitigating depletion of frequency resources in the future. 
     As another example of such discussion, for example, in the U.S., frequency operation of sharing the same frequency band among a plurality of radio systems having different priority (also referred to as Tier) has been studied. For example, in study of “the U.S. FCC, “GN Docket No. 12-354 NOTICE OF PROPOSED RULEMAKING AND ORDER”, December 2012”, a 3.5 GHz which is used as non-federal fixed-satellite service and radar of the Department of Defense is proposed as a candidate for a band of such frequency operation. Further, the study is carried out assuming that a database which provides channel information, location information and priority information relating to a frequency band to be operated, which is called a spectrum access system (SAS) is employed. 
     In the case where frequency bands overlap with each other as in secondary utilization of the frequency, there is a case where radio transmission interferes with each other among different radio systems  10 . Therefore, in the communication system  1  according to the present disclosure, interference among different radio systems  10  is avoided by the communication control device  300  controlling whether or not frequency hopping is performed when each radio system  10  performs radio transmission. Note that frequency hopping refers to the receiving station  100  utilizing a frequency resource while switching a plurality of frequency resources within a time unit assigned to communication of one transmitting station  200  (user) 
     The communication control device  300  is an apparatus which controls radio communication in the plurality of radio systems  10  included in the communication system  1 . In the example illustrated in  FIG. 1 , the communication control device  300  is a server. The server  300  controls radio communication in each radio system  10  based on information of a radio network (hereinafter, also referred to as network information) operated by each radio system  10 . The network information can include, for example, information indicating a frequency band utilized by the radio system  10 , information indicating a communication area, a communication time slot, or the like. The server  300  acquires this network information from, for example, the DB  400  or the sensor apparatus  500  via a communication network  700 . Note that, other than the examples illustrated in  FIG. 1 , for example, the communication control device may be implemented as the receiving station  100 , the transmitting station  200 , the DB  400 , the sensor apparatus  500 , or an arbitrary apparatus (a physical apparatus or a logical apparatus) other than these. Further, a plurality of communication control devices  300  may be provided within the communication system  1 . For example, the communication control device  300  may be provided for each radio system  10 . Note that a radio system  10  whose radio communication is to be controlled by the communication control device  300  will be also referred to as a radio system  10  to be controlled in the following description. 
     The communication network  700  is a wired or wireless communication network such as, for example, a packet data network (PDN) and the Internet. 
     The DB  400  is a storage apparatus which stores network information. The DB  400  registers/updates the network information received from each radio system  10  and transmits the network information in response to an inquiry. Note that, hereinafter, the network information stored in the DB  400  will be also referred to as DB registration information. 
     The sensor apparatus  500  is an apparatus which senses frequency utilization situations by the surrounding radio systems  10  to collect network information. Hereinafter, the network information collected by the sensor apparatus  500  will be also referred to as sensing information. Note that the DB registration information is the same type of information as that of the sensing information, or the DB registration information is a different type of information from that of the sensing information. Further, other than the example illustrated in  FIG. 1 , for example, the sensor apparatus may be implemented as the receiving station  100 , the transmitting station  200  or an arbitrary apparatus (a physical apparatus or a logical apparatus) other than these apparatuses. Further, the sensor apparatus  500  may be provided independently from each radio system  10  or may belong to each radio system  10 . 
     The outline of the communication system  1  according to the present embodiment has been described above. 
     2. Configuration Example 
     Subsequently, a configuration example of each component included in the communication system  1  according to the present embodiment will be described with reference to  FIG. 2  to  FIG. 33 . 
     [2-1. Receiving Station] 
       FIG. 2  is a block diagram illustrating an example of a logical configuration of the receiving station  100  according to the present embodiment. As illustrated in  FIG. 2 , the receiving station  100  according to the present embodiment includes a communication unit  110  and a control unit  120 . 
     [2-1-1. Communication Unit] 
     The communication unit  110  is a communication interface which mediates communication between the receiving station  100  and other apparatuses. The communication unit  110  transmits/receives data with other apparatuses in a wired or wireless manner. 
     For example, the communication unit  110  functions as a radio communication unit which performs radio communication with the transmitting station  200 . In this case, for example, the communication unit  110  receives a radio signal transmitted from the transmitting station  200  while frequency hopping is performed. The communication unit  110  may have a function as an amplifier, a frequency converter, a demodulator, or the like, and, for example, can output the received data to the control unit  120 . In addition, the communication unit  110  may transmit a radio signal to the transmitting station  200  through an antenna. The communication unit  110  may have a function as a modulator, an amplifier, or the like, and, for example, may perform modulation, power amplification, or the like, on the data output from the control unit  120  and transmit the data. 
     In addition, the communication unit  110  transmits/receives data to/from the communication control device  300 , the DB  400  or the sensor apparatus  500  in a wired/wireless manner. 
     (Sensing Function) 
     The communication unit  110  may have a function as the sensor apparatus  500  which will be described later. For example, the communication unit  110  acquires sensing information by measuring a reception radio wave level (strength) concerning a use frequency band of the radio system  10  to which the receiving station  100  itself belongs. For example, the communication unit  110  receives a request for the network information from the communication control device  300  and transmits the sensing information acquired by the communication unit  110  to the communication control device  300  directly or indirectly via an arbitrary communication node such as the transmitting station  200 . 
     (Data Reception Function) 
     The communication unit  110  receives data transmitted from the transmitting station  200 . As will be described later, the transmitting station  200  can transmit data while performing frequency hopping based on frequency hopping setting information. In this case, the communication unit  110  receives the data transmitted from the transmitting station  200  based on the frequency hopping setting information. More specifically, the communication unit  110  performs reception and decoding for a radio resource portion according to a frequency hopping pattern used by the transmitting station  200 . Note that the frequency hopping setting information is information relating to frequency hopping performed by the transmitting station  200  belonging to the radio system  10  to be controlled. More detailed description will be provided later. 
     The communication unit  110  receives the frequency hopping setting information from the communication control device  300  directly or indirectly via an arbitrary communication node such as the transmitting station  200 . Further, the communication unit  110  may notify the transmitting station  200  of the frequency hopping setting information acquired from the communication control device  300 . The receiving station  100  performs this notification, for example, in the case where a base station of a cellular system is implemented as the receiving station  100 , and a user terminal is implemented as the transmitting station  200 . A frequency hopping setting information notification function will be described in detail later in description regarding the transmitting station  200 . 
     [2-1-2. Control unit] 
     The control unit  120 , which functions as an arithmetic processing apparatus and a control apparatus, controls the whole operation within the receiving station  100  according to various kinds of programs. The control unit  120  is implemented with an electronic circuit such as, for example, a central processing unit (CPU) and a microprocessor. Note that the control unit  120  may include a read only memory (ROM) which stores a program, an operation parameter, or the like, to be used and a random access memory (RAM) which temporarily stores a parameter, or the like, which changes as appropriate. 
     For example, the control unit  120  controls the receiving station  100  to receive the data transmitted by the transmitting station  200  while frequency hopping is performed, based on the frequency hopping setting information acquired from the communication control device  300 . Specifically, the control unit  120  controls the communication unit  110  to perform decoding processing assuming that the transmitting station  200  performs data transmission while performing frequency hopping using the frequency hopping setting information. 
     For example, the control unit  120  controls the communication unit  110  to acquire sensing information. In this event, the control unit  120  may control the communication unit  110  to acquire the sensing information periodically or control the communication unit  110  to acquire the sensing information by being triggered by reception of a request from the server  300 . The control unit  120  controls the communication unit  110  to transmit the acquired sensing information to the communication control device  300  periodically or in response to a request. Note that, in the case where the receiving station  100  is implemented as, for example, a user terminal of a cellular system, an uplink control channel (PUCCH) or an uplink data channel (PUSCH) is utilized for transmitting the sensing information to the transmitting station  200 . 
     Note that the control unit  120  can have a function as a control unit  320  of the communication control device  300  which will be described later. 
     [2-2. Transmitting Station] 
       FIG. 3  is a block diagram illustrating an example of a logical configuration of the transmitting station  200  according to the present embodiment. As illustrated in  FIG. 3 , the transmitting station  200  according to the present embodiment includes a communication unit  210  and a control unit  220 . 
     [2-2-1. Communication Unit] 
     The communication unit  210  is a communication interface which mediates communication between the transmitting station  200  and other apparatuses. The communication unit  210  transmits/receives data to/from other apparatuses in a wired or wireless manner. 
     For example, the communication unit  210  functions as a radio communication unit which performs radio communication with the receiving station  100 . In this case, for example, the communication unit  210  transmits a radio signal subjected to frequency hopping to the receiving station  100  via an antenna. The communication unit  210  may have a function as a modulator, an amplifier, or the like, and, for example, may perform modulation, power amplification, or the like, on the data output from the control unit  220  and transmit the data. Further, the communication unit  210  may receive a radio signal transmitted from the receiving station  100 . The communication unit  210  may have a function as an amplifier, a frequency converter, a demodulator, or the like, and, for example, can output the received data to the control unit  220 . 
     In addition, the communication unit  210  transmits/receives data to/from the communication control device  300 , the DB  400  or the sensor apparatus  500  in a wired/wireless manner. 
     (Sensing Function) 
     The communication unit  210  may have a function as a sensor apparatus  500  which will be described later. For example, the communication unit  210  acquires the sensing information by measuring a reception radio wave level concerning a frequency band utilized at the radio system  10  to which the transmitting station  200  itself belongs. For example, the communication unit  210  receives a request for the network information from the communication control device  300  and transmits the sensing information acquired by the communication unit  210  to the communication control device  300  directly or indirectly via an arbitrary communication node such as the receiving station  100 . 
     (Frequency Hopping Function) 
     The communication unit  210  transmits data to the receiving station  100 . In this event, the transmitting station  200  can transmit data while performing frequency hopping based on an instruction from the communication control device  300 . More specifically, the communication unit  210  performs frequency hopping based on the frequency hopping setting information received from the communication control device  300 . The frequency hopping can be executed in various units. An example of the units will be described below. 
     &lt;Frequency Direction&gt; 
     
         
         
           
             subcarrier unit 
             subcarrier block unit (such as a resource block) 
             frequency channel unit (a component carrier of carrier aggregation, a channel of channel bonding)
 
&lt;Time Direction&gt;
 
             symbol unit (such as a digital modulation symbol and an OFDM/SC-FDMA symbol) 
             symbol block unit (such as a block of a plurality of symbols and a slot) 
             frame unit (such as a subframe and a packet) 
             frame block unit (such as a radio frame) 
             unit of further upper layer (such as an IP packet and a session) 
           
         
       
    
     The communication unit  210  performs frequency hopping by utilizing a radio resource according to a rule indicated in the frequency hopping setting information. Hereinafter, a utilization rule of the radio resource will be also referred to as a frequency hopping pattern. An example of the frequency hopping pattern is illustrated in  FIG. 4  to  FIG. 6 . 
       FIG. 4  to  FIG. 6  are explanatory diagrams for explaining an example of the frequency hopping pattern in the radio system  10  to be controlled according to the present embodiment.  FIG. 4  illustrates a frequency hopping pattern in which hopping is performed in a subcarrier unit in a frequency direction and in a symbol unit in a time direction.  FIG. 5  illustrates a frequency hopping pattern in which hopping is performed in a subcarrier unit in a frequency direction and in a symbol block unit in a time direction.  FIG. 6  illustrates a frequency hopping pattern in which hopping is performed in a resource block unit in a frequency direction and in a slot unit in a time direction. These diagrams illustrate frequency hopping patterns for transmitting data to a terminal i which is the receiving station  100 . The communication unit  210  can transmit data using a radio resource along the frequency hopping pattern illustrated in each diagram. 
     (Specific Frequency Hopping Implementing Means) 
     The communication unit  210  can transmit data while performing frequency hopping using various means. For example, the communication unit  210  performs frequency hopping in a physical layer (PHY layer). Here, a case will be described as an example with reference to  FIG. 7  where a multicarrier modulation scheme such as orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) is employed. Further, a case will be described with reference to  FIG. 8  where a multicarrier modulation scheme such as single-carrier frequency-division multiple access (SC-FDMA) is employed. 
       FIG. 7  is an explanatory diagram for explaining an example of a functional configuration of the communication unit  210  of the transmitting station  200  according to the present embodiment. As illustrated in  FIG. 7 , the communication unit  210  has an error correction coding function  2101 , an interleave function  2102 , a serial to parallel (S/P) conversion function  2103 , a digital modulation function  2104 A, a digital conversion function  2104 B, a resource mapping function  2105 , a filtering function  2106 , an inverse fast Fourier transform (IFFT) function  2107 , a cyclic prefix (CP) addition function  2108  and a radio frequency (RF) function  2109 . 
       FIG. 8  is an explanatory diagram for explaining an example of a functional configuration of the communication unit  210  of the transmitting station  200  according to the present embodiment. As illustrated in  FIG. 8 , the communication unit  210  has an error correction coding function  2101 , an interleave function  2102 , a digital modulation function  2104 , an FFT function  2110 , a resource mapping function  2105 , a filtering function  2106 , an IFFT function  2107 , a CP addition function  2108  and an RF function  2109 . 
     In any functional configuration, frequency hopping can be executed by, for example, transmission data being mapped to radio resources according to the frequency hopping pattern when resources are mapped by the resource mapping function  2105 . Specifically, for example, the resource mapping function  2105  changes a mapping destination according to time when modulation symbols are mapped to frequency direction resources such as a subcarrier, a resource block and a component carrier. Further, frequency hopping can be executed by radio transmission being performed along the frequency hopping pattern when a radio signal is transmitted by the RF function  2109 . Specifically, for example, the RF function  2109  changes a carrier frequency according to time using a frequency synthesizer, or the like. 
     Here, the filtering function  2106  will be described in detail. As illustrated in  FIG. 7 , the communication unit  210  of the transmitting station  200  performs IFFT to generate an OFDM signal after error correction coding, interleave, digital modulation, resource mapping, or the like, are performed. At that time, the communication unit  210  can lower a level of out-of-band radiation of a signal by further performing filtering. Such type of OFDM is often also referred to as, for example, “Filtered OFDM”, “Pulse shape OFDM”, “Filter bank multicarrier”, or the like. 
     An OFDM signal x(t) associated with filtering is defined with the following equation. 
     
       
         
           
             
               
                 
                   [ 
                   
                     Math 
                     . 
                     
                         
                     
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     Here, K is the number of subcarriers. c k, 1  is a signal component (corresponding to a digital modulation symbol such as a PSK and a QAM in the case of OFDM) of a subcarrier k. g k (t) is a filtering coefficient. T is an OFDM symbol length. Δ F  is subcarrier spacing. Note that, it can be said that a normal OFDM signal which is not associated with filtering corresponds to a signal obtained by applying the filtering coefficient g k (t) in the following equation to the above-described equation 1. 
     
       
         
           
             
               
                 
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     In the case where a signal is generated by performing filtering, the communication unit  210  may convert the signal into an RF signal and transmit the RF signal without adding a CP which would be added for each OFDM symbol in the case of normal OFDM. In this case, if it is possible to appropriately eliminate or equalize interference between symbols at the receiving station  100  side, it is possible to reduce out-of-band radiation and prevent degradation of frequency utilization efficiency. 
     As described above, because the communication unit  210  has the filtering function  2106 , it is possible to lower an out-of-band radiation level and contribute to reduction in interference with other radio systems  10 . Therefore, in the case where the communication unit  210  performs filtering and frequency hopping in combination, it is possible to further increase an effect of reducing interference with other radio systems  10 . For example, the communication unit  210  may switch whether or not to perform filtering according to whether or not frequency hopping is performed. Still further, the communication unit  210  may switch whether or not to perform CP addition according to whether or not filtering is performed. For example, in the case where filtering is performed by employing Filtered OFDM, or the like, because there is a case where it is difficult to add a CP, the communication unit  210  may omit CP addition in the case where filtering is performed and may add a CP in the case where filtering is not performed. Still further, the communication unit  210  may switch whether or not to perform up-sampling according to whether or not filtering is performed. The communication unit  210  can further lower an out-of-band radiation level by making filtering ON coordinate with up-sampling ON. 
     The example where frequency hopping is performed in the PHY layer has been described above. Other than the above example, the communication unit  210  may perform frequency hopping in an upper layer of the PHY layer. Here, as an example, an example where frequency hopping is performed in a L2 layer or upper layer, for example, in a datalink layer (MAC layer) will be described with reference to  FIG. 9  and  FIG. 10 . 
       FIG. 9  is an explanatory diagram for explaining an example of a functional configuration of the communication unit  210  of the transmitting station  200  according to the present embodiment. As illustrated in  FIG. 9 , the communication unit  210  has a robust header compression (ROHC) function  2111 , a security function  2112 , a radio link control (RLC) entity function  2113 , a scheduling function  2114 , a multiplexing function  2115 , hybrid automatic repeat request (HARQ) entity functions  2116 A and  2116 B, PHY processing functions  2117 A and  2117 B, and RF processing functions  2118 A and  2118 B. Note that PDCP in the drawing is a packet data convergence protocol. 
     This functional configuration example is an example in the case where the communication unit  210  performs HARQ in a frequency channel unit. The communication unit  210  performs frequency hopping in the scheduling function  2114  and/or the multiplexing function  2115 . In this functional configuration example, the HARQ entity function  2116  is provided in a later stage of the scheduling function  2114  and the multiplexing function  2115  which can perform frequency hopping. Therefore, concerning a hopping unit in a time direction, hopping is preferably applied in at least a frame (subframe) unit. 
     Note that the order of these functions is arbitrary, and, for example, the HARQ entity function  2116  may be provided in a later stage of the scheduling function  2114 , and the multiplexing function  2115  may be provided in a later stage of the HARQ entity function  2116 . In this case, concerning a hopping unit in a time direction, hopping can be applied in a unit equal to or smaller than a frame unit. 
       FIG. 10  is an explanatory diagram for explaining an example of a functional configuration of the communication unit  210  of the transmitting station  200  according to the present embodiment. As illustrated in  FIG. 10 , the communication unit  210  has a multiplexing function  2115 , ROHC functions  2111 A and  2111 B, security functions  2112 A and  2112 B, RLC entity functions  2113 A and  2113 B, scheduling functions  2114 A and  2114 B, HARQ entity functions  2116 A and  2116 B, PHY processing functions  2117 A and  2117 B, and RF processing functions  2118 A and  2118 B. 
     This functional configuration example is an example in the case where the communication unit  210  has a function of the L2 layer as well as a function of the L1 layer for each frequency channel. In this case, hopping is preferably performed in a data unit of an upper layer. For example, an IP layer packet corresponds to this example. Hopping in a frequency direction can be performed according to which frequency channel is used to transmit a packet. Concerning a time direction, for example, hopping can be performed by the scheduling functions  2114 A and  2114 B and/or the RF functions  2118 A and  2118 B. 
     (Frequency Hopping Setting Information Notification Function) 
     The communication unit  210  receives the frequency hopping setting information from the communication control device  300  directly or indirectly via an arbitrary communication node such as the receiving station  100 . Further, the communication unit  210  may notify the receiving station  100  of the frequency hopping setting information acquired from the communication control device  300 . The transmitting station  200  performs this notification in the case where, for example, the base station of the cellular system is implemented as the transmitting station  200  and the user terminal is implemented as the receiving station  100 . 
     The communication unit  210  can notify the receiving station  100  of the frequency hopping setting information using various means. An example of the means will be specifically described below. 
     (1) Notify for Each Communication Link 
     The communication unit  210  notifies the receiving station  100  of the frequency hopping setting information every time a communication link occurs for data transmission/reception. In this case, the frequency hopping setting information is transmitted using a control channel for each communication link by the radio communication apparatus belonging to the radio system  10  to be controlled by the communication control device  300 . 
     In the case where a system operates based on a subframe or a slot as in the cellular system, a control channel and a data channel relate to this function. For example, the communication unit  210  stores the frequency hopping setting information in a control channel (for example, PDCCH) within a subframe, and transmits the information to the receiving station  100 . Specifically, the communication unit  210  can store the frequency hopping setting information in downlink control information (DCI) of the PDCCH. The communication unit  210  then applies frequency hopping based on the frequency hopping setting information to a data channel. 
     There is a variety of possible relationship between a control channel in which the frequency hopping setting information is stored and a data channel to which frequency hopping is applied. A specific example of this relationship will be described below with reference to  FIG. 11  to  FIG. 13 . 
       FIG. 11  is an explanatory diagram for explaining an example of the relationship between the control channel and the data channel in the frequency hopping setting information notification processing according to the present embodiment. In the example illustrated in  FIG. 11 , frequency hopping based on the frequency hopping setting information is applied to the data channel within the same subframe as that of the control channel in which the frequency hopping setting information is stored. This example can be applied in, for example, downlink communication from the base station to the user terminal. 
       FIG. 12  is an explanatory diagram for explaining an example of the relationship between the control channel and the data channel in the frequency hopping setting information notification processing according to the present embodiment. In the example illustrated in  FIG. 12 , frequency hopping based on the frequency hopping setting information is applied to a data channel within a subframe different from a subframe in which the frequency hopping setting information is stored. This example can be applied in, for example, downlink communication from the base station to the user terminal. Further, as another example, in time division duplex (TDD), the base station can give an instruction of frequency hopping of an uplink data channel of the user terminal using a downlink control channel. 
       FIG. 13  is an explanatory diagram for explaining an example of relationship between the control channel and the data channel in the frequency hopping setting information notification processing according to the present embodiment. In the example illustrated in  FIG. 13 , frequency hopping based on the frequency hopping setting information is applied to a data channel within a subframe of a frequency different from a subframe in which the frequency hopping setting information is stored. This example can be applied, for example, in the case where, in frequency division duplex (FDD), the base station gives an instruction of frequency hopping in uplink transmission of the user terminal using a downlink control channel, and the user terminal applies the instructed frequency hopping upon uplink transmission of the user terminal. Further, upon application of carrier aggregation discussed in LTE-A, frequency hopping of a data channel of one frequency can be instructed using a control channel of another frequency (component carrier). 
     A case where a system operates based on a subframe or a slot as in the cellular system has been described above. Other than the example described above, for example, storage of the frequency hopping setting information and application of frequency hopping based on the frequency hopping setting information may be performed between different control channels or may be performed between different data channels. 
     On the other hand, in the case where a system operates based on a packet as in a wireless LAN system, a header portion and a data portion of a packet relate to this function. For example, the communication unit  210  stores the frequency hopping setting information in the header portion within the packet and applies frequency hopping based on the frequency hopping setting information to the data portion. 
     There is a variety of possible relationship between a header portion in which the frequency hopping setting information is stored and a data portion to which frequency hopping is applied. A specific example of this relationship will be described below with reference to  FIG. 14 . 
       FIG. 14  is an explanatory diagram for explaining an example of the relationship between the header portion and the data portion in the frequency hopping setting information notification processing according to the present embodiment. In the example illustrated in  FIG. 14 , frequency hopping based on the frequency hopping setting information is applied to a data portion (PHY data) subsequent to a header portion (PHY header) within the same packet, in which the frequency hopping setting information is stored. 
     (2) Notify for Each Single or Plurality of Apparatuses 
     The communication unit  210  gives notification of the frequency hopping setting information for each single or plurality of receiving stations  100  which perform data transmission/reception. In this case, the frequency hopping setting information is unicasted by a radio communication apparatus belonging to the radio system  10  to be controlled by the communication control device  300 . A timing of the notification may be a different cycle from that of notification for each communication link. 
     For example, in the cellular system, the communication unit  210  transmits the frequency hopping setting information to the receiving station  100  using a system information block (SIB). Notification of the SIB is performed by utilizing an LTE downlink data channel (PDSCH) for system information. Notification of the SIB is basically performed periodically, and updated periodically. Of course, notification of the SIB is performed non-periodically. Here, a specific example of notification using the SIB will be described with reference to  FIG. 15 . 
       FIG. 15  is an explanatory diagram for explaining an example of the frequency hopping setting information notification processing according to the present embodiment.  FIG. 15  illustrates an example where the communication unit  210  transmits the SIB using every other radio frames of 10 msec in LTE downlink. In this example, the communication unit  210  transmits the SIB in which the same frequency hopping setting information is stored four times and updates frequency hopping setting information to be transmitted at intervals of 80 msec. 
     The communication unit  210  may perform notification as to which subframe is used to perform notification of the SIB using, for example, a master information block (MIB). Notification of the MIB is performed using an LTE downlink broadcast channel (PBCH) unlike with the SIB. Notification/retransmission of the MIB is basically performed periodically, and the MIB is updated periodically. 
       FIG. 16  is an explanatory diagram for explaining an example of the frequency hopping setting information notification processing according to the present embodiment.  FIG. 16  illustrates an example where the MIB is transmitted continuously using radio frames of 10 msec in LTE downlink. In this example, the communication unit  210  transmits the MIB in which the same information is stored four times and updates information to be transmitted at intervals of 40 msec. 
     The communication unit  210  may transmit the frequency hopping setting information as, for example, RRC signaling in a radio resource control (RRC) layer other than the SIB. Note that notification of the RRC signaling is basically performed using the PDSCH. 
     In the above-described example where notification is performed for each apparatus, the communication unit  210  transmits data by applying the same frequency hopping setting information unless the frequency hopping setting information is updated. Note that the communication unit  210  may set a specific apparatus as a transmission destination. The communication unit  210  may, for example, set one specific apparatus as a transmission destination by performing unicast transmission or may set a plurality of specific apparatuses as transmission destinations by performing multicast transmission. 
     (3) Notify Whole System or Part of System 
     The communication unit  210  notifies the whole system or part of the system of the frequency hopping setting information. In this case, the frequency hopping setting information is broadcasted by the radio communication apparatus belonging to the radio system  10  to be controlled by the communication control device  300 . For example, an apparatus which controls the whole radio system  10  to be controlled performs broadcast transmission to apparatuses which are controlled by the apparatus. For example, a base station in a cellular system, or an access point in a wireless LAN system performs broadcast transmission. 
     For example, in the cellular system, the communication unit  210  performs notification of the frequency hopping setting information using a broadcast channel (PBCH). Normally, a radio resource of the cellular system is made a subframe (or a slot) in a time direction, and the PBCH is regularly transmitted from the base station in downlink using the subframe (or the slot). The communication unit  210  stores the frequency hopping setting information in this PBCH. In the cellular system like LTE, the communication unit  210  may store the frequency hopping setting information in the master information block (MIB) or the system information block (SIB). 
     For example, in the wireless LAN system, the communication unit  210  broadcasts the frequency hopping setting information. For example, in the case of the wireless LAN system which operates based on a packet, the communication unit  210  performs transmission using a broadcast packet. 
     In the above-described example where notification is performed to the whole system (or part of the system), the communication unit  210  transmits data by applying the same frequency hopping setting information unless the frequency hopping setting information is updated. Note that the communication unit  210  may set a plurality of specific apparatuses as transmission destinations by performing multicast transmission. 
     The specific means for performing notification of the frequency hopping setting information has been described above. 
       FIG. 17  is an explanatory diagram for explaining relationship between frequency hopping setting information notification means and channels according to the present embodiment. An upper part of  FIG. 17  illustrates a logical channel, a middle part illustrates a transport channel, and a lower part illustrates a physical channel. In  FIG. 17 , (1), (2) and (3) specifically described above are respectively mapped to channels. For example, in the case of “(1) notification for each communication link”, notification is performed using a PDCCH while the frequency hopping setting information is stored as a DCI in the physical channel. Further, in the case of “(2) notification for each single or plurality of apparatuses”, notification is performed using a PDSCH after the frequency hopping setting information is stored as the SIB or the RRC signaling in the logical channel. Further, in the case of “(3) notification to whole system or part of system”, notification is performed using the PBCH after the frequency hopping setting information is stored as the MIB or the SIB in the logical channel. In this manner, procedure as to whether processing is performed in the logical channel or in the physical channel can change according to a channel used for notification. 
     [2-2-2. Control Unit] 
     The control unit  220 , which functions as an arithmetic processing apparatus and a control apparatus, controls the whole operation within the transmitting station  200  according to various kinds of programs. For example, the control unit  220  is implemented with an electronic circuit such as a CPU and a microprocessor. Note that the control unit  220  may include a ROM which stores a program, an operation parameter, or the like, to be used and a RAM which temporarily stores a parameter, or the like, which changes as appropriate. 
     For example, the control unit  220  performs control so that the transmitting station  200  transmits data while performing frequency hopping. More specifically, the control unit  220  controls the communication unit  210  to transmit data while performing frequency hopping based on the frequency hopping setting information acquired from the communication control device  300 . 
     For example, the control unit  220  controls the communication unit  210  to transmit the frequency hopping setting information which is information relating to frequency hopping performed by the transmitting station  200  to the receiving station  100  belonging to the same radio system  10  as the transmitting station  200 . 
     For example, the control unit  220  controls the communication unit  210  to acquire sensing information. In this event, the control unit  220  may control the communication unit  210  to acquire the sensing information periodically or may control the communication unit  210  to acquire the sensing information by being triggered by reception of a request from the server  300 . The control unit  520  controls the communication unit  210  to transmit the acquired sensing information to the communication control device  300  periodically or in response to a request. 
     Note that the control unit  220  can have a function as a control unit  320  of the communication control device  300  which will be described later. 
     [2-3. Communication Control Device] 
       FIG. 18  is a block diagram illustrating an example of a logical configuration of the communication control device  300  according to the present embodiment. As illustrated in  FIG. 18 , the communication control device  300  according to the present embodiment includes a communication unit  310  and a control unit  320 . 
     [2-3-1. Communication Unit] 
     The communication unit  310  is a communication interface which mediates communication between the communication control device  300  and other apparatuses. The communication unit  310  transmits/receives data to/from other apparatuses in a wired or wireless manner. 
     For example, the communication unit  310  performs communication with apparatuses (the receiving station  100  and the transmitting station  200 ) belonging to each radio system  10 . In addition, the communication unit  310  performs communication with the DB  400  and the sensor apparatus  500 . 
     Note that the communication control device  300  may be the same as or independent from the receiving station  100  or the transmitting station  200 . Here, the meaning of the same/independent includes meaning of logically the same/independent as well as meaning of physically the same/independent. The communication unit  310  performs transmission/reception through a wired or wireless communication circuit in the case of an independent apparatus and performs transmission/reception inside the apparatus in the case of the same apparatus. 
     (Network Information Collection Function) 
     The communication unit  310  transmits a request for network information and receives the network information. For example, the communication unit  310  acquires the network information of other radio systems  10  from the DB  400  by transmitting a request to the DB  400  and receiving a reply of DB registration information. Further, the communication unit  310  acquires network information of other radio systems  10  from the sensor apparatus  500  by transmitting a request to the sensor apparatus  500  and receiving a reply of sensing information. The communication unit  310  may directly receive the network information from the DB  400  or the sensor apparatus  500  or may receive the network information by way of other arbitrary communication nodes. The communication unit  310  may acquire the network information for control processing of the radio system  10  by the control unit  320  or may regularly acquire/update the network information. While a cycle of acquisition/updating is arbitrary, for example, the cycle is preferably set within a range between 30 seconds and one day. 
     (Frequency Hopping Setting Information Notification Function) 
     The communication unit  310  notifies each radio system  10  of the frequency hopping setting information generated by the control unit  320 . For example, the communication unit  310  transmits the frequency hopping setting information to the receiving station  100  and the transmitting station  200  included in each radio system  10  directly or indirectly via an arbitrary communication node. 
     By this means, for example, in the cellular system, the UE and the eNB which function as the receiving station  100  or the transmitting station  200  acquire the frequency hopping setting information. In any case, the UE acquires the frequency hopping setting information by way of the eNB. The eNB transmits the frequency hopping setting information to the UE using, for example, a broadcast channel or a broadcast packet. Further, concerning device-to-device communication (D2D communication) in which communication is directly performed between terminals, two or more UEs which function as the receiving station  100  or the transmitting station  200  acquire the frequency hopping setting information by way of the eNB. 
     Note that the communication unit  310  may perform notification of each information included in the frequency hopping pattern setting information at a time or may perform notification in a divided manner. 
     (Frequency Hopping Pattern Registration Function) 
     The communication unit  310  transmits a frequency hopping pattern decided by the control unit  320  to the DB  400 . By this means, in the case where the communication control device  300  is provided, for example, for each of the radio system  10 , a frequency hopping pattern to be utilized by the own system can be shared with other radio systems  10  via the DB  400 . By this means, it is possible to select frequency hopping patterns so that the frequency hopping patterns of the respective radio systems  10  do not overlap with each other. 
     [2-3-2. Control Unit] 
     The control unit  320 , which functions as an arithmetic processing apparatus and a control apparatus, controls the whole operation within the communication control device  300  according to various kinds of programs. The control unit  320  is implemented with an electronic circuit such as, for example, a CPU and a microprocessor. Note that the control unit  320  may include a ROM which stores a program, an operation parameter, or the like, to be used and a RAM which temporarily stores a parameter, or the like, which changes as appropriate. 
     The control unit  320  controls radio communication of the radio system  10  to be controlled based on the network information. Specifically, the control unit  320  performs control as to whether the transmitting station  200  belonging to the radio system  10  to be controlled performs frequency hopping based on the network information of another radio system  10  (second radio network) different from the radio system  10  to be controlled (first radio network). The control unit  320  generates the frequency hopping setting information by collecting the network information, deciding an operation mode of the radio system  10  to be controlled and deciding a frequency hopping pattern of the radio system  10  to be controlled. Each function of the control unit  320  will be sequentially described below. 
     (Network Information Collection Function) 
     For example, the control unit  320  acquires the network information via the communication unit  310 . For example, the control unit  320  may acquire DB registration information from the DB  400  as the network information. The control unit  230  acquires the DB registration information returned from the DB  400  by, for example, transmitting a request for the network information to the DB  400 . Alternatively, the control unit  320  may acquire sensing information from the sensor apparatus  500  (the sensor apparatus  500  or a communication node such as the receiving station  100  and the transmitting station  200  which functions as the sensor apparatus  500 ) as the network information. The control unit  320  acquires the sensing information returned from the sensor apparatus  500  by, for example, transmitting a request for the network information to the sensor apparatus  500 . The control unit  320  may acquire the network information relating to a plurality of radio systems at the same time. 
     (Definition of Network Information) 
     Note that the control unit  320  may use either the DB registration information or the sensing information as the network information or may use the both in combination. A specific example of specific content of the network information will be described below. 
     DB Registration Information 
     For example, the DB registration information includes information indicated in the following table. The following table indicates DB registration information relating to one radio system  10 . The DB registration information for a plurality of radio systems  10  may be provided at the same time. 
     
       
         
           
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 DB registration information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Information indicating operating system 
               
               
                   
                 Information indicating operator 
               
               
                   
                 Information indicating operating frequency band 
               
               
                   
                 Information indicating operating location 
               
               
                   
                 Information indicating operating period 
               
               
                   
                 Information indicating priority 
               
               
                   
                 Information indicating frequency hopping pattern 
               
               
                   
                   
               
            
           
         
       
     
     “Information indicating operating system” is identification information for identifying the radio system  10 . “Information indicating operator” is identification information for identifying an operator which operates the radio system  10 . “Information indicating operating frequency band” is information indicating a frequency band utilized by the radio system  10 . “Information indicating operating location” is information indicating a location where the radio system  10  is operated. “Information indicating operating period” is information indicating a temporal range in which the radio system  10  is operated. “Information indicating priority” is information indicating priority of the radio system  10 . “Information indicating frequency hopping pattern” is information indicating a frequency hopping pattern employed by the radio system  10 . 
     Note that the “frequency hopping pattern” can include, for example, a flag indicating whether or not frequency hopping is performed, and information indicating the frequency hopping pattern in the case where frequency hopping is performed. Further, information relating to a plurality of frequency hopping patterns which can be employed by the radio system  10  may be stored in the “frequency hopping pattern”. In this case, information indicating which frequency hopping pattern is utilized to perform frequency hopping is also included. 
     Another example of the DB registration information is indicated in the following table. 
     
       
         
           
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 DB registration information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Information indicating operating system 
               
               
                   
                 Information indicating operator 
               
               
                   
                 Information indicating lower limit of operating frequency band 
               
               
                   
                 Information indicating upper limit of operating frequency band 
               
               
                   
                 Information indicating operating location 
               
               
                   
                 Information indicating operating period 
               
               
                   
                 Information indicating priority 
               
               
                   
                 Information indicating threshold λ of OBWR 
               
               
                   
                 Information indicating frequency hopping pattern 
               
               
                   
                   
               
            
           
         
       
     
     “Information indicating lower limit of operating frequency band” is information indicating a lower limit of a frequency band utilized by the radio system  10 . “Information indicating upper limit of operating frequency band” is information indicating an upper limit of a frequency band utilized by the radio system  10 . “Information indicating threshold λ of OBWR” is information indicating a threshold relating to a ratio of overlapping of use frequency bands which will be described later. 
     Note that information included in the DB registration information indicated in the above-described table includes information which may be omitted. For example, when the communication control device  300  includes information indicating at least any of the operating location, the operating period and the operating frequency band of the radio system  10  to be controlled in a request for the network information, information corresponding to the included information may not be provided as the DB registration information. That is, by the DB  400  side selectively providing the DB registration information relating to the radio systems  10  which are likely to interfere as a result of the operating locations, the operating periods and the operating frequency bands overlapping with each other or coming close to each other, these information may be omitted. 
     Other than the above-described examples, the DB registration information may be a parameter which is allowed by the radio system  10  to be controlled. In this case, for example, the control unit  320  includes information of the radio system  10  to be controlled in a request for the network information, and the DB  400  side calculates an allowable parameter. An example of the DB registration information in this case is indicated in the following table. 
     
       
         
           
               
             
               
                 TABLE 3 
               
               
                   
               
               
                 DB registration information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Information indicating allowable frequency band 
               
               
                   
                 Information indicating allowable location 
               
               
                   
                 Information indicating allowable period 
               
               
                   
                 Information indicating allowable maximum transmission power 
               
               
                   
                 Information indicating allowable priority 
               
               
                   
                 Information indicating allowable frequency hopping pattern 
               
               
                   
                   
               
            
           
         
       
     
     “Information indicating allowable frequency band” is information indicating a frequency band which can be utilized by the radio system  10  to be controlled. “Information indicating allowable location” is information indicating a location where the radio system  10  to be controlled can operate a radio network by utilizing the allowable frequency band. “Information indicating allowable location” is information indicating a period during which the radio system  10  to be controlled can operate a radio network at the allowable location by utilizing the allowable frequency band. “Information indicating allowable maximum transmission power” is information indicating maximum transmission power which can be used by the transmitting station  200  included in the radio system  10  to be controlled. “Information indicating allowable priority” is information indicating priority of the radio system  10  to be controlled. “Information indicating allowable frequency hopping pattern” is information indicating a frequency hopping pattern which is allowed to be employed at the radio system  10  to be controlled. 
     Sensing Information 
     The sensing information is provided in the case where there is a radio system  10  which can be sensed by the sensor apparatus  500 . For example, the sensing information includes information indicated in the following table. The sensing information for a plurality of radio systems  10  may be provided at the same time. 
     
       
         
           
               
             
               
                 TABLE 4 
               
               
                   
               
               
                 Sensing information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Information indicating system to be sensed 
               
               
                   
                 Information indicating flag indicating presence/absence of system 
               
               
                   
                 Information indicating sensing frequency band 
               
               
                   
                 Information indicating sensing location 
               
               
                   
                 Information indicating sensing period 
               
               
                   
                 Information indicating priority 
               
               
                   
                 Information indicating sensing frequency hopping pattern 
               
               
                   
                   
               
            
           
         
       
     
     “Information indicating system to be sensed” is identification information for identifying the radio system  10  to be sensed. “Information indicating flag indicating presence/absence of system” is a flag indicating whether or not the radio system  10  to be controlled can be sensed. “Information indicating sensing frequency band” is information indicating a frequency band in which radio communication by the radio system  10  to be controlled can be sensed and information relating to a frequency band utilized by the radio system  10  to be sensed. “Information indicating sensing location” is information indicating a location of the sensor apparatus  500  which performs sensing and information relating to a location where the radio system  10  to be sensed is operated. “Information indicating sensing period” is information indicating a period during which a transmission wave by the target radio system  10  can be sensed and information relating to a period during which the radio system  10  to be sensed is operated. “Information indicating priority” is information indicating priority of the radio system  10  to be sensed. “Information indicating sensing frequency hopping pattern” is information indicating a sensed frequency hopping pattern. 
     Note that, for example, the sensor apparatus  500  can identify which radio system  10  performs the sensed radio communication from a waveform of a received wave. Further, the sensor apparatus  500  can store priority for each radio system  10 . 
     On the other hand, there can be a case where it is difficult to identify which radio system  10  performs the sensed radio communication, for example, in the case where the sensor apparatus  500  senses only a received power level. In this case, for example, the control unit  320  determines the “flag indicating presence/absence of system” by comparing the sensed received power level with a threshold. An example of the sensing information in this case is indicated in the following table. 
     
       
         
           
               
             
               
                 TABLE 5 
               
               
                   
               
               
                 Sensing information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Information indicating system to be sensed 
               
               
                   
                 Information indicating sensing level result 
               
               
                   
                 Information indicating sensing frequency band 
               
               
                   
                 Information indicating sensing location 
               
               
                   
                 Information indicating sensing period 
               
               
                   
                 Information indicating priority 
               
               
                   
                 Information indicating sensing frequency hopping pattern 
               
               
                   
                   
               
            
           
         
       
     
     “Information indicating sensing level result” is information indicating a received power level sensed by the sensor apparatus  500 . The sensing level result may be information indicating a value of the received power level, or, as indicated in the following table, may be information indicating a result of division of the received power level into N classes. 
                             TABLE 6                          Received power value                                             to −50   −50 dBm   −60 dBm       −40 − 10*(N − 2)dBm   −40 − 10*(N −           dBm   to −60 dBm   to −70 dBm   . . .   to −40 − 10*(N − 1)dBm   2)dBm to                                                     Sensing   0   1   2   . . .   N − 2   N − 1       level result                    
(Operation Mode Decision Function)
 
     The control unit  320  decides the operation mode of the radio system  10  to be controlled to be a frequency hopping mode or a normal mode. Note that the frequency hopping mode is an operation mode in which the transmitting station  200  transmits data while performing frequency hopping. The normal mode is an operation mode in which the transmitting station  200  transmits data without performing frequency hopping. The control unit  320  can decide the operation mode based on various criteria. An example of the criteria for deciding the operation mode will be described below. Note that the control unit  320  may decide the operation mode by arbitrarily combining the criteria described below. 
     Necessity of Acquisition of Network Information 
     For example, the control unit  320  may decide the operation mode based on whether it is necessary to acquire the network information. For example, the control unit  320  can decide the normal mode in the case where it is required under law to acquire the network information of other radio systems  10  and it is not required to set the frequency hopping mode as the operation mode. Whether or not it is necessary to acquire the network information can comply with radio wave regulations of each country such as, for example, the U.S. Federal SAS and Europe lisence shared access (LSA). A form in which the operation mode is decided based on whether or not it is necessary to acquire the network information is useful in the case where it is difficult to acquire accurate network information of the radio system  10  to be controlled. For example, concerning a system such as radar whose use frequency band changes over time, there is a case where it is difficult to acquire accurate information of a frequency band, time, a location, or the like, utilized by the system. Further, there is also a case where the DB  400  provides a radio parameter (such as, for example, a frequency (center and width) which is allowed to be utilized, allowable maximum transmission power and allowable utilization period) which is allowed to be utilized by the radio system  10  to be controlled in place of the network information of other radio systems  10 . In such a case, it can be difficult to evaluate a possibility that the radio system  10  to be controlled interferes with other radio systems  10 . Also in such a case, it is possible to reduce interference with other radio systems (for example, a radar system) by the radio system  10  to be controlled by applying frequency hopping. 
     Priority of Network 
     Further, the control unit  320  may decide the operation mode based on priority of other radio systems  10 . For example, the control unit  320  may decide the frequency hopping mode as the operation mode in the case where priority of other radio systems  10  is higher than priority of the radio system  10  to be controlled, and decide the normal mode as the operation mode in the case where the priority of other radio systems  10  is lower than the priority of the radio system  10  to be controlled. By this means, it is possible to reduce interference with a radio system  10  having higher priority and improve communication quality of the radio system  10  to be controlled. Note that the control unit  320  may decide the frequency hopping mode as the operation mode in the case where there is a possibility that other radio systems  10  having priority equal to the priority of the radio system  10  to be controlled exist. The control unit  320  determines a possibility that there exist other radio systems  10  having higher priority based on the network information of each radio system  10 . 
     The priority may be arbitrarily set by the control unit  320  or may be set based on radio wave regulations of the country where the radio system  10  is used, such as, for example, the U.S. Federal SAS and Europe LSA. Here, a specific example of the priority will be described with reference to  FIG. 19  to  FIG. 21 . 
       FIG. 19  to  FIG. 21  are explanatory diagrams for explaining an example of priority of the radio system  10  in the present embodiment.  FIG. 19  illustrates an example of priority relating to TV white space. As illustrated in  FIG. 19 , because the TV system should be protected against interference from other radio systems, high priority is set. Priority lower than the priority of the TV system is set at other radio systems which can interfere with the TV system.  FIG. 20  illustrates an example of priority in the U.S. Federal SAS.  FIG. 21  illustrates an example of priority in Europe LSA. As illustrated in  FIG. 20  and  FIG. 21 , two or three levels of priority can be set. Of course, an arbitrary level of four or more levels of priority may be set. 
     Possibility of Interference 
     Other than above, the control unit  320  may decide the operation mode based on whether or not there is a possibility that the radio system  10  to be controlled may interfere with other radio systems  10 . For example, the control unit  320  may decide the frequency hopping mode as the operation mode in the case where there is a possibility of interference, and decide the normal mode as the operation mode in the case where there is no possibility of interference. The control unit  320  determines the possibility of interference based on the network information of each radio system  10 . 
     Interference Determination Based on Overlapping of Use Frequency Bands 
     For example, the control unit  320  determines that there is a possibility of interference in the case where there is a possibility that a use frequency band of the radio system  10  to be controlled may at least partially overlap with use frequency bands of other radio systems  10 . The control unit  320  determines overlapping of use frequency bands based on the network information and determines a possibility of interference based on this determination result. 
     In the case where the control unit  320  determines overlapping of the use frequency bands based on the sensing information, it is preferable to provide ranges in determination compared to the case where determination is performed based on the DB registration information. For example, the control unit  320  may regard that there is a possibility that use frequency bands may overlap in the case where another radio system  10  which utilizes a band within a predetermined range from the use frequency band of the radio system  10  to be controlled is detected. By this means, it is possible to prevent interference with other radio systems  10  more strongly. Further, by setting a range where there is a possibility of overlapping and determining the range within a predetermined width, it is possible to exempt other radio systems  10  which are less likely to interfere from determination. Of course, providing ranges in determination may also be performed in a similar manner in determination processing based on the DB registration information. 
     The control unit  320  may determine overlapping of use frequency bands based on whether or not other radio systems  10  change use frequency bands over time. For example, the control unit  320  may determine that there is a possibility of overlapping of use frequency bands in the case where other radio systems  10  change the use frequency bands over time, because there is a possibility that the use frequency bands may overlap while other radio systems  10  change the use frequency bands. By this means, it is possible to prevent interference with other radio systems  10  more strongly. 
     Further, the control unit  320  may determine that there is a possibility of overlapping of use frequency bands in the case where a direction in which other radio systems  10  change the use frequency bands over time is a direction approaching the use frequency band of the radio system  10  to be controlled. By this means, it is possible to prevent interference with other radio systems  10  more strongly. Further, the control unit  320  may determine that there is no possibility of overlapping of use frequency bands in the case where a direction in which other radio systems  10  change the use frequency bands over time is a direction away from the use frequency band of the radio system  10  to be controlled. By this means, it is possible to reduce cases where it is determined that there is a possibility of overlapping of use frequency bands, so that it is possible to prevent the radio system  10  to be controlled from performing unnecessary frequency hopping. Note that the radio system  10  which changes the use frequency band over time can include, for example, a radar system. 
     The control unit  320  determines whether or not other radio systems  10  change the use frequency bands over time based on the network information of the other radio systems  10 . The control unit  320  may know whether or not other radio systems  10  change the use frequency bands over time from the DB registration information or may know from the sensing information through determination processing. In the case where it is determined whether or not other radio systems  10  change the use frequency bands over time based on the sensing information, the sensor apparatus  500  preferably senses a wider bandwidth around the frequency band of the radio system  10  to be controlled as well as the use frequency band of the radio system  10  to be controlled. Sensing by the sensor apparatus  500  and the determination processing at the control unit  320  will be described with reference to  FIG. 22  and  FIG. 23 . 
       FIG. 22  and  FIG. 23  are explanatory diagrams for explaining temporal change of the use frequency band by the radio system  10  according to the present embodiment. 
     For example,  FIG. 22  illustrates an example where the radio system to be sensed changes the use frequency band from a low band to a high band over time. A reference numeral  2200  indicates a frequency band to be utilized by another radio system  10  which is not to be controlled, and a reference numeral  2210  indicates a frequency band to be utilized by the radio system  10  to be controlled. Further, the sensor apparatus  500  senses a range (reference numeral  2220 ) wider than the frequency band to be utilized by the radio system  10  to be controlled. In this manner, by the sensor apparatus  500  sensing a wider range, the control unit  320  can detect that there exists a radio system  10  which changes a frequency band over time and that a direction in which the radio system  10  changes the frequency band over time is a direction approaching the use frequency band before the frequency band overlaps with the use frequency band of the radio system to be controlled. By this means, it is possible to promptly execute frequency hopping at the radio system  10  to be controlled, so that it is possible to increase a possibility of reducing interference with other radio systems  10  and preventing degradation. 
     Here, while  FIG. 22  illustrates an example where the sensor apparatus  500  continuously senses a bandwidth, as illustrated in  FIG. 23 , the sensor apparatus  500  may discretely sense a bandwidth. A reference numeral  2300  indicates a frequency band utilized by another radio system  10  which is not to be controlled, and a reference numeral  2310  indicates a frequency band utilized by the radio system  10  to be controlled. Further, the sensor apparatus  500  senses a range wider than the frequency band utilized by the radio system  10  to be controlled for each of bands which are obtained by discretely separating the band into indexes #-N to #M (reference numerals  2320 #-N 2320 #M). In the case where the sensor apparatus  500  discretely performs sensing, because a state where the use frequency changes over time appears as detected change of the channel, the control unit  320  can easily detect temporal change of the use frequency of the radio system  10 . Further, because, at the sensor apparatus  500 , one sensing band can be made narrower, for example, also in the case where energy detection is performed in individual bands, it is possible to moderate requirements of a sensing technology which are individually required. Note that, while, in  FIG. 23 , a bandwidth is set at intervals of a fixed frequency, the bandwidth may be set at an arbitrary interval. Further, while  FIG. 23  illustrates a bandwidth to be sensed such that the use frequency band of the radio system  10  to be controlled is the widest, and other bandwidths are narrow, the bandwidths may be equal or other bandwidths may be wider. In this case, it is possible to make sensing at the sensor apparatus  500  simpler. 
     Note that, while  FIG. 22  and  FIG. 23  illustrate examples where the frequency band changes from a low band to a high band over time, the same also applies to the case where the frequency band changes from a high band to a low band over time. Further, the above-described temporal change of the use frequency band is made different from hopping in a time direction in frequency hopping. For example, it is also possible to regard change of the use frequency band in a unit longer than an arbitrary unit in a time direction as temporal change and regard change of the use frequency band in a shorter unit as hopping. Other than the above, it is also possible to regard change of the frequency band without performing communication as in the radar system as temporal change and regard change of the frequency band while performing communication as hopping. 
     Interference Determination Based on Overlapping of Operating Locations 
     For example, the control unit  320  determines that there is a possibility of interference in the case where there is a possibility that the operating location of the radio system  10  to be controlled may at least partially overlap with the operating locations of other radio systems  10 . The control unit  320  determines overlapping of the operating locations based on the network information and determines a possibility of interference based on this determination result. 
     Interference Determination Based on Overlapping of Operating Periods 
     For example, the control unit  320  determines that there is a possibility of interference in the case where the operating period of the radio system  10  to be controlled may at least partially overlap with the operating periods of other radio systems  10 . The control unit  320  determines overlapping of the operating periods based on the network information and determines a possibility of interference based on this determination result. 
     The use frequency band, the operating location and the operating period have been described above as an example of the criteria for determining a possibility of interference. The control unit  320  may use these determination criteria in combination. For example, the control unit  320  may determine that there is a possibility of interference in the case where at least one of these is satisfied. Further, the control unit  320  can determine that there is no possibility of interference in the case where at least one of these is different or overlapping is equal to or less than a predetermined ratio. 
     Ratio of Overlapping of Use Frequency Bands 
     The control unit  320  may decide the operation mode based on a ratio of the use frequency band of the radio system  10  to be controlled overlapping with the use frequency bands of other radio systems  10 . The control unit  320  calculates a ratio of overlapping of the frequency bands based on the network information of each radio system  10 . Hereinafter, this ratio will be also referred to as an overlap bandwidth ratio (OBWR). There are various ways how the frequency bands overlap and various methods for calculating the ratio OBWR. Specific examples will be described below with reference to  FIG. 24  to  FIG. 27 . 
       FIG. 24  to  FIG. 27  are explanatory diagrams for explaining an example of calculation of a ratio of overlapping of the use frequency bands.  FIG. 24  to  FIG. 27  illustrate examples where part of in-band radiation overlaps among the use frequency bands of two radio systems  10 . Further, in each drawing, an upper part indicates a frequency band utilized by the other radio system  10  which is not to be controlled, and a lower part indicates a frequency band utilized by the radio system  10  to be controlled. Further, F 1 L and F 1 H respectively indicate a lower limit and an upper limit of the use frequency band of the other radio system  10 . In a similar manner, F 2 L and F 2 H respectively indicate a lower limit and an upper limit of the use frequency band of the radio system  10  to be controlled. A calculation equation of the OBWR in the drawing is an equation for calculating a ratio OBWR of overlapping of the frequency bands. Here, a ratio of overlapping is calculated using a bandwidth utilized by the other radio system as a reference (denominator). 
     More specifically, in the example of  FIG. 24 , the ratio OBWR is calculated from (F 1 H−F 2 L)/(F 1 H−F 1 L). In the example of  FIG. 25 , the ratio OBWR is calculated from (F 2 H−F 1 L)/(F 1 H−F 1 L). In the example of  FIG. 26 , the ratio OBWR is calculated from (F 2 H−F 2 L)/(F 1 H−F 1 L). In the example of  FIG. 27 , the ratio OBWR is calculated from (F 2 H−F 2 L)/(F 1 H−F 1 L). 
     For example, the control unit  320  decides the operation mode based on whether or not the calculated ratio OBWR exceeds a threshold λ. For example, the control unit  320  decides the frequency hopping mode as the operation mode in the case where the ratio OBWR exceeds the threshold λ and decides the normal mode as the operation mode in the case where the ratio OBWR is equal to or less than the threshold λ. The threshold λ can be provided from, for example, the DB  400 , or the like. Further, the threshold λ may be different according to other radio systems  10  to be calculated. 
     Note that, while, in  FIG. 24  to  FIG. 27 , concerning F 1 L, F 1 H, or the like, a reference corresponding to a bandwidth of 3 dB is used, a method for setting such a value is not necessarily desirable. As another method for setting F 1 L, F 1 H, or the like, for example, a value also taking into account out-of-band radiation may be set. Further, F 1 L, F 1 H, or the like, are preferably registered in the DB  400  for each radio system and provided as part of the network information. Further, other than the examples illustrated in  FIG. 24  to  FIG. 27 , for example, there are a possible case where the use frequency bands of the two radio systems  10  completely match, a possible case where the in-band radiation overlaps with the out-of-band radiation, or the like. 
     An example of criteria for deciding the operation mode has been described above. 
     (Frequency Hopping Pattern Decision Function) 
     The control unit  320  decides information relating to the frequency hopping pattern according to information of the radio system  10  with which the radio system  10  to be controlled is likely to interfere. 
     For example, the control unit  320  decides a frequency band in which frequency hopping is performed according to network information of the radio system  10  with which the radio system  10  to be controlled is likely to interfere. Specifically, for example, the control unit  320  decides to perform frequency hopping in a frequency band which overlaps with the frequency bands utilized by other radio systems  10  which are likely to interfere. By this means, it is possible to reduce interference with other radio systems  10 . Further, the radio system  10  to be controlled can utilize more radio resources while being interfered with other radio systems  10 . An example of frequency hopping in the case where such control is performed will be described with reference to  FIG. 28  and  FIG. 29 . 
       FIG. 28  and  FIG. 29  are explanatory diagrams for explaining an example of the frequency hopping pattern in the radio system  10  to be controlled according to the present embodiment. In the example illustrated in  FIG. 28 , the radio system  10  to be controlled performs frequency hopping in the frequency bands utilized by other radio systems  10 , so that part of the frequency band which is not utilized by the radio systems  10  can be partially utilized. In the example illustrated in  FIG. 29 , the radio system  10  to be controlled performs frequency hopping in the frequency bands utilized by other radio systems  10 , so that all of the frequency band which is not utilized by the radio systems  10  can be utilized. Note that the control unit  320  may decide to perform frequency hopping in a band other than the frequency band which overlaps with the frequency bands utilized by other radio systems  10  which are likely to interfere or may decide not to perform frequency hopping in an overlapped region. 
     While the frequency bands of the radio systems  10  which are likely to interfere have been described above, the control unit  320  can decide other information relating to the frequency hopping according to the network information of the radio systems  10  with which the radio system  10  to be controlled is likely to interfere. 
     For example, the control unit  320  may decide a time slot in which the radio system  10  to be controlled performs frequency hopping according to a time slot in which the radio systems  10  which are likely to interfere are operated. Specifically, the control unit  320  may decide a time slot in which frequency hopping is performed so that frequency hopping is performed in a time slot which overlaps with a time slot in which the radio systems  10  which are likely to interfere are operated or time slots before and after the time slot. By this means, it is possible to reduce interference with other radio systems  10 . Further, the radio system  10  to be controlled can utilize more radio resources. 
     For example, the control unit  320  may decide a location where the radio system  10  to be controlled performs frequency hopping according to locations where the radio systems  10  which are likely to interfere are operated. Specifically, the control unit  320  may decide a location where frequency hopping is performed so that frequency hopping is performed at a location which overlaps with the locations where the radio systems  10  which are likely to interfere are operated or locations near the locations. By this means, it is possible to reduce interference with other radio systems  10 . Further, the radio system  10  to be controlled can utilize more radio resources. 
     The control unit  320  decides a hopping pattern of frequency hopping performed by the radio system  10  to be controlled. For example, the control unit  320  may decide a pattern of frequency hopping performed by the radio system  10  to be controlled according to patterns of frequency hopping performed by other radio systems  10  which are likely to interfere. Specifically, the control unit  320  may decide a hopping pattern different from hopping patterns of frequency hopping performed by other radio systems  10  which are likely to interfere as a hopping pattern of frequency hopping performed by the radio system  10  to be controlled. In this case, it is possible to reduce a possibility of overlapping and collision of frequency hopping patterns, so that it is possible to further reduce interference. Note that, in order to easily decide different patterns, the number of frequency hopping patterns is preferably limited to a finite number. 
     In the Case where Radio System Utilizes a Plurality of Frequency Bands 
     The radio system  10  can utilize a plurality of frequency bands. For example, in the cellular system, a plurality of frequency bands are utilized by a carrier aggregation technology. In the case where a plurality of frequency bands are utilized, there is a possibility that one of the plurality of frequency bands utilized by the radio system  10  may overlap with frequency bands utilized by other radio systems  10 . In this case, the control unit  320  may decide to apply frequency hopping in a frequency band which is the same as the frequency bands utilized by other radio systems  10 . By this means, it is possible to reduce interference with other radio systems  10  in a portion where the frequency bands overlap and avoid unnecessary frequency hopping in a portion where the frequency bands do not overlap. Such a case will be specifically described below with reference to  FIG. 30 . 
       FIG. 30  is an explanatory diagram for explaining an example where use frequency bands of two radio systems  10  partially overlap. In  FIG. 30 , an upper part indicates a frequency band utilized by the other radio system  10  which is not to be controlled, and a lower part indicates a frequency band utilized by the radio system  10  to be controlled. As illustrated in  FIG. 30 , the radio system  10  to be controlled utilizes two frequency bands F 1  and F 2 . The frequency band F 1  is utilized by a primary cell and/or a base station # 1 , and the frequency band F 2  is utilized by a secondary cell and/or a base station # 2 . As illustrated in  FIG. 30 , the frequency band F 2  utilized by the secondary cell and/or the base station # 2  overlaps with the use frequency band F 1  of the other radio system  10 . Therefore, the control unit  320  makes decision such that the secondary cell and/or the base station # 2  performs frequency hopping and the primary cell and/or the base station # 1  does not perform frequency hopping. By this means, frequency hopping is performed in the frequency band F 2 , and interference with the other radio system  10  is reduced. Further, unnecessary frequency hopping processing in the frequency band F 1  is avoided. 
     Note that the radio system  10  to be controlled may notify each communication node of the frequency hopping setting information concerning a portion where the frequency bands overlap using a portion where the frequency bands do not overlap. For example, in the example illustrated in  FIG. 30 , the radio system  10  to be controlled notifies each communication node of the frequency hopping setting information concerning the frequency band F 2  using the frequency band F 1 . In this event, for example, a control channel or a broadcast channel can be used in the frequency band F 1 . Such a case will be specifically described below with reference to  FIG. 31 . 
       FIG. 31  is an explanatory diagram for explaining an example where use frequency bands of two radio systems  10  partially overlap.  FIG. 31  illustrates notification of the frequency hopping setting information at the radio system  10  to be controlled and an example of a radio resource utilized for transmitting data by performing frequency hopping in the example illustrated in  FIG. 30 . The frequency bands F 1  and F 2  in the drawing are the same as those used in  FIG. 30 . As illustrated in  FIG. 31 , the radio system  10  to be controlled performs notification of the frequency hopping setting information concerning the frequency band F 2  using a control channel (and a DCI) of the frequency band F 1 . Further, as illustrated in  FIG. 31 , the radio system  10  to be controlled performs frequency hopping in the frequency band F 2  based on the frequency hopping setting information notified using the control channel (and the DCI) of the frequency band F 1 . 
     (Frequency Hopping Setting Information Generation Function) 
     The control unit  320  decides a frequency hopping pattern utilized by the radio system  10  to be controlled and generates frequency hopping setting information indicating the decided frequency hopping pattern. An example of the frequency hopping setting information is indicated in the following table. 
     
       
         
           
               
             
               
                 TABLE 7 
               
               
                   
               
               
                 Frequency hopping setting information 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
            
               
                 Information indicating frequency hopping ON/OFF 
               
               
                 Information indicating frequency hopping pattern 
               
               
                 Information indicating frequency band in which frequency hopping is 
               
               
                 performed 
               
               
                 Information indicating time slot in which frequency hopping is performed 
               
               
                 Information indicating location where frequency hopping is performed 
               
               
                   
               
            
           
         
       
     
     Information Indicating Frequency Hopping ON/OFF 
     Information indicating frequency hopping ON/OFF is information indicating whether or not the radio system  10  to be controlled performs frequency hopping, and information indicating the operation mode decided by the above-described operation mode decision function. For example, the information indicates ON in the case of the frequency hopping mode and indicates OFF in the case of the normal mode. 
     Information Indicating Frequency Hopping Pattern 
     Information indicating the frequency hopping pattern is information indicating a frequency hopping pattern performed by the radio system  10  to be controlled. There are various possible methods for indicating the frequency hopping pattern. As an example, the control unit  320  decides a pattern using parameters relating to one or more categories defining the frequency hopping pattern and performs notification of the parameters as the information indicating the frequency hopping pattern. The control unit  320  can simplify processing for deciding the pattern and performing notification by employing the parameters as the information indicating the frequency hopping pattern. The information indicating the frequency hopping pattern may be an index indicating any of candidates for the frequency hopping patterns limited to a finite number. In this case, it is possible to further simplify processing for deciding the pattern and performing notification. 
     It is preferable to employ parameters relating to different categories. As an example, the control unit  320  can employ parameters relating to four categories indicated in the following table. 
     
       
         
           
               
             
               
                 TABLE 8 
               
               
                   
               
               
                 Parameters defining frequency hopping pattern 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                   
                 Frequency direction of frequency hopping 
               
               
                   
                 Time direction of frequency hopping 
               
               
                   
                 Initial offset of frequency hopping 
               
               
                   
                 Frequency traveling direction of frequency hopping 
               
               
                   
                   
               
            
           
         
       
     
     Parameters of the “frequency direction of frequency hopping” are parameters which define hopping in a frequency direction and can be in various units such as a subcarrier unit, a resource block unit, a component carrier unit, or the like. Parameters of the “time direction of frequency hopping” are parameters which define hopping in a time direction and can be in various units such as a symbol unit, a slot unit, a subframe unit, or the like. Parameters of the “initial offset of frequency hopping” are parameters which define an initial state of a frequency direction or a time direction and can be in various units such as a subcarrier unit, a resource block unit, a component carrier unit, or the like. Note that the unit of the “frequency direction of frequency hopping” is preferably the same as the unit of the “offset of frequency hopping”. Parameters of the “frequency traveling direction of frequency hopping” are parameters which define a direction of hopping in a frequency direction and can be a positive direction (hopping from a low frequency band to a high frequency band) or a negative direction (hopping from a high frequency band to a low frequency band). 
     The control unit  320  can decide the frequency hopping pattern by selecting the above-described four parameters from a finite number of candidates. Because the number of possible values of the parameters is finite, the number of frequency hopping patterns which can be utilized becomes finite. Candidates for this finite number are preferably defined in advance at the radio system  10  to be controlled. Of course, the candidates are not limited to the candidates of the finite number, and the control unit  320  may decide an arbitrary value. An example of candidates relating to each parameter is indicated in the following table. 
     
       
         
           
               
               
             
               
                 TABLE 9 
               
               
                   
               
               
                 Parameter 
                 Value 
               
               
                   
               
             
            
               
                 Frequency direction of frequency hopping (subcarrier unit, 
                 1 
               
               
                 resource block unit, component carrier unit, or the like) 
                 2 
               
               
                   
                 4 
               
               
                 Time direction of frequency hopping (symbol unit, slot unit, 
                 1 
               
               
                 subframe unit, or the like) 
                 2 
               
               
                   
                 4 
               
               
                 Initial offset of frequency hopping (subcarrier unit, resource 
                 0 
               
               
                 block unit, component carrier unit, or the like) 
                 1 
               
               
                   
                 2 
               
               
                   
                 3 
               
               
                 Frequency traveling direction of frequency hopping 
                 0 (Positive 
               
               
                   
                 direction) 
               
               
                   
                 1 (Negative 
               
               
                   
                 direction) 
               
               
                   
               
            
           
         
       
     
     Further, an example of the frequency hopping pattern using four parameters is indicated in the following table. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
               
                   
                   
                   
                   
                 Frequency 
               
               
                 Pattern 
                 Frequency 
                 Time 
                 Initial 
                 traveling 
               
               
                 No. 
                 direction 
                 direction 
                 offset 
                 direction 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 1 
                 1 
                 subcarrier 
                 1 
                 symbol 
                 0 
                 subcarrier 
                 0 
               
               
                 2 
                 2 
                 subcarriers 
                 1 
                 symbol 
                 0 
                 subcarrier 
                 0 
               
               
                 3 
                 4 
                 subcarriers 
                 1 
                 symbol 
                 0 
                 subcarrier 
                 0 
               
               
                 4 
                 4 
                 subcarriers 
                 2 
                 symbols 
                 0 
                 subcarrier 
                 0 
               
               
                 5 
                 4 
                 subcarriers 
                 4 
                 symbols 
                 0 
                 subcarrier 
                 0 
               
               
                 6 
                 4 
                 subcarriers 
                 1 
                 symbol 
                 1 
                 subcarrier 
                 0 
               
               
                 7 
                 4 
                 subcarriers 
                 1 
                 symbol 
                 2 
                 subcarriers 
                 0 
               
               
                 8 
                 4 
                 subcarriers 
                 1 
                 symbol 
                 3 
                 subcarriers 
                 0 
               
               
                 9 
                 4 
                 subcarriers 
                 4 
                 symbols 
                 11 
                 subcarriers 
                 1 
               
            
           
           
               
               
               
               
               
               
               
            
               
                 10 
                 1 
                 resource block 
                 1 
                 slot 
                 0 resource 
                 0 
               
               
                   
                   
                   
                   
                   
                 block 
               
               
                 11 
                 1 
                 resource block 
                 2 
                 slots 
                 2 resource 
                 1 
               
               
                   
                   
                   
                   
                   
                 blocks 
               
            
           
           
               
               
               
               
               
               
            
               
                 12 
                 1 component 
                 1 
                 symbol 
                 0 component 
                 0 
               
               
                   
                 carrier 
                   
                   
                 carrier 
               
               
                 13 
                 1 component 
                 1 
                 slot 
                 1 component 
                 1 
               
               
                   
                 carrier 
                   
                   
                 carrier 
               
               
                   
               
            
           
         
       
     
     “Pattern No.” is information indicating an index of the frequency hopping pattern. Here,  FIG. 4  is a frequency hopping pattern using No. 7,  FIG. 5  is a frequency hopping pattern using No. 9, and  FIG. 6  is a frequency hopping pattern using No. 10. 
     The frequency hopping pattern can be also obtained using a calculation equation by utilizing information of each category. For example, in the case where an index of a subcarrier prior to application of hopping in a symbol t is k b (t), a unit of hopping in a frequency direction is K hop , a unit in a time direction is T hop , a frequency direction offset is T off , and the number of subcarriers of the whole system is K total , a subcarrier index k a (t) after application of hopping in the symbol t can be expressed with the following equation. 
     
       
         
           
             
               
                 
                   [ 
                   
                     Math 
                     . 
                     
                         
                     
                     ⁢ 
                     3 
                   
                   ] 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       k 
                       a 
                     
                     ⁡ 
                     
                       ( 
                       t 
                       ) 
                     
                   
                   = 
                   
                     
                       { 
                       
                         
                           
                             k 
                             b 
                           
                           ⁡ 
                           
                             ( 
                             t 
                             ) 
                           
                         
                         + 
                         
                           
                             floor 
                             ⁡ 
                             
                               ( 
                               
                                 t 
                                 
                                   T 
                                   hop 
                                 
                               
                               ) 
                             
                           
                           ⁢ 
                           
                             k 
                             hop 
                           
                         
                         + 
                         
                           k 
                           off 
                         
                       
                       } 
                     
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     mod 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       K 
                       total 
                     
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   3 
                 
               
             
           
         
       
     
     Here, information of the subcarrier index k b (t) prior to application of hopping is preferably assigned separately through scheduling. For example, in an LTE base system, the information is preferably assigned to each user (user terminal) using a control channel (PDCCH), or the like. 
     As another example, a case where frequency hopping is performed in resource block unit will be described. A case is assumed where two slots are normally assigned for each user in a time direction. The transmitting station  200  calculates an index of a resource block in a frequency direction actually utilized for transmission in the assigned first slot using the following equations. 
     
       
         
           
             
               
                 
                   [ 
                   
                     Math 
                     . 
                     
                         
                     
                     ⁢ 
                     4 
                   
                   ] 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   n 
                   PRB 
                   
                     S 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     1 
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   4 
                 
               
             
             
               
                 
                   
                     [ 
                     
                       Math 
                       . 
                       
                           
                       
                       ⁢ 
                       5 
                     
                     ] 
                   
                   ⁢ 
                   
                       
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       n 
                       PRB 
                       
                         S 
                         ⁢ 
                         
                             
                         
                         ⁢ 
                         1 
                       
                     
                     = 
                     
                       
                         
                           n 
                           ~ 
                         
                         PRB 
                         
                           S 
                           ⁢ 
                           
                               
                           
                           ⁢ 
                           1 
                         
                       
                       + 
                       
                         
                           
                             N 
                             ~ 
                           
                           RB 
                           HO 
                         
                         / 
                         2 
                       
                     
                   
                   ⁢ 
                   
                     
 
                   
                   ⁢ 
                   
                     Here 
                     , 
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   5 
                 
               
             
             
               
                 
                   [ 
                   
                     Math 
                     . 
                     
                         
                     
                     ⁢ 
                     6 
                   
                   ] 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       N 
                       ~ 
                     
                     RB 
                     HO 
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             
                               N 
                               RB 
                               HO 
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               RB 
                               HO 
                             
                             = 
                             
                               an 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               even 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               number 
                             
                           
                         
                       
                       
                         
                           
                             
                               
                                 H 
                                 RB 
                                 HO 
                               
                               + 
                               1 
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               RB 
                               HO 
                             
                             = 
                             
                               an 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               odd 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               number 
                             
                           
                         
                       
                     
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   6 
                 
               
             
           
         
       
     
     Note that
 
[Math. 7]
 
N RB   HO   Equation 7
 
is an initial offset of frequency hopping. Further,
 
[Math. 8]
 
ñ PRB   S1   Equation 8
 
is an index of a resource block temporarily assigned before a frequency hopping position is determined. Here,
 
[Math. 9]
 
N RB   HO   ,ñ   PRB   S1   Equation 9
 
are both notified as the frequency hopping setting information.
 
     On the other hand, the transmitting station  200  calculates an index of a resource block in a frequency direction actually utilized for transmission in the assigned second slot using the following equations.
 
[Math. 10]
 
n PRB   Equation 10
 
[Math. 11]
 
 n   PRB   =ñ   PRB   +Ñ   RB   HO /2  Equation 11
 
where information relating to the frequency hopping position
 
[Math. 12]
 
ñ PRB   Equation 12
 
is designated as the frequency hopping setting information, and, for example, designated based on a table indicated below as an example, which is defined within the communication system  1 .
 
     
       
         
           
               
               
               
             
               
                 TABLE 11 
               
               
                   
               
               
                 The number of 
                   
                   
               
               
                 resource blocks 
                 Pattern 
                 Information relating to frequency 
               
               
                 N RB  in system 
                 index 
                 hopping position ñ PRB   
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 49 or less 
                 0 
                 {floor(N RB   SCH /2) + ñ PRB   S1 }mod N PRB   SCH   
               
               
                   
                 1 
                 Separately designated 
               
               
                 50 or more 
                 0 
                 {floor(N RB   SCH /4) + ñ PRB   S1 }mod N PRB   SCH   
               
               
                   
                 1 
                 {−floor(N RB   SCH /4) + ñ PRB   S1 }mod N PRB   SCH   
               
               
                   
                 2 
                 {floor(N RB   SCH /2) + ñ PRB   S1 }mod N PRB   SCH   
               
               
                   
                 3 
                 Separately designated 
               
               
                   
               
            
           
         
       
     
     Note that in the above table, it is assumed that
 
[Math. 13]
 
 N   RB   SCH   =N   RB   −Ñ   RB   HO −( N   RB  mod 2)  Equation 13
 
     Further, in the same table, in the case where a pattern corresponding to “separately designated” is indicated, information relating to the frequency hopping positions in the assigned first slot and second slot is obtained using the following equations. 
     
       
         
           
             
               
                 
                   
                       
                   
                   ⁢ 
                   
                     [ 
                     
                       Math 
                       . 
                       
                           
                       
                       ⁢ 
                       14 
                     
                     ] 
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       n 
                       ~ 
                     
                     PRB 
                   
                   ⁡ 
                   
                     ( 
                     
                       n 
                       s 
                     
                     ) 
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   14 
                 
               
             
             
               
                 
                   [ 
                   
                     Math 
                     . 
                     
                         
                     
                     ⁢ 
                     15 
                   
                   ] 
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       
                         n 
                         ~ 
                       
                       PRB 
                     
                     ⁡ 
                     
                       ( 
                       
                         n 
                         s 
                       
                       ) 
                     
                   
                   = 
                   
                     
                       [ 
                       
                         
                           
                             n 
                             ~ 
                           
                           VRB 
                         
                         + 
                         
                           
                             
                               f 
                               hop 
                             
                             ⁡ 
                             
                               ( 
                               i 
                               ) 
                             
                           
                           ⁢ 
                           
                             N 
                             RB 
                             sb 
                           
                         
                         + 
                         
                           
                             { 
                             
                               
                                 ( 
                                 
                                   
                                     N 
                                     RB 
                                     sb 
                                   
                                   - 
                                   1 
                                 
                                 ) 
                               
                               - 
                               
                                 2 
                                 ⁢ 
                                 
                                   ( 
                                   
                                     
                                       
                                         n 
                                         ~ 
                                       
                                       VRB 
                                     
                                     ⁢ 
                                     mod 
                                     ⁢ 
                                     
                                         
                                     
                                     ⁢ 
                                     
                                       N 
                                       RB 
                                       sb 
                                     
                                   
                                   ) 
                                 
                               
                             
                             } 
                           
                           ⁢ 
                           
                             
                               f 
                               m 
                             
                             ⁡ 
                             
                               ( 
                               i 
                               ) 
                             
                           
                         
                       
                       ] 
                     
                     ⁢ 
                     mod 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       ( 
                       
                         
                           N 
                           RB 
                           sb 
                         
                         ⁢ 
                         
                           N 
                           sb 
                         
                       
                     
                   
                 
               
               
                 
                   Equation 
                   ⁢ 
                   
                       
                   
                   ⁢ 
                   15 
                 
               
             
             
               
                 
                   i 
                   = 
                   
                     { 
                     
                       
                         
                           
                             
                               floor 
                               ⁡ 
                               
                                 ( 
                                 
                                   
                                     n 
                                     s 
                                   
                                   / 
                                   2 
                                 
                                 ) 
                               
                             
                             , 
                           
                         
                         
                           
                             inter 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             subframe 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             hopping 
                           
                         
                       
                       
                         
                           
                             
                               n 
                               s 
                             
                             , 
                           
                         
                         
                           
                             intra 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             and 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             inter 
                             ⁢ 
                             
                               - 
                             
                             ⁢ 
                             subframe 
                             ⁢ 
                             
                                 
                             
                             ⁢ 
                             hopping 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     n 
                     PRB 
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             
                               
                                 
                                   n 
                                   ~ 
                                 
                                 PRB 
                               
                               ⁡ 
                               
                                 ( 
                                 
                                   n 
                                   s 
                                 
                                 ) 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             1 
                           
                         
                       
                       
                         
                           
                             
                               
                                 
                                   
                                     n 
                                     ~ 
                                   
                                   PRB 
                                 
                                 ⁡ 
                                 
                                   ( 
                                   
                                     n 
                                     s 
                                   
                                   ) 
                                 
                               
                               + 
                               
                                 ceil 
                                 ⁡ 
                                 
                                   ( 
                                   
                                     
                                       N 
                                       RB 
                                       HO 
                                     
                                     / 
                                     2 
                                   
                                   ) 
                                 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             &gt; 
                             1 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       n 
                       ~ 
                     
                     VRB 
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             n 
                             
                               VRB 
                               , 
                             
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             1 
                           
                         
                       
                       
                         
                           
                             
                               
                                 n 
                                 VRB 
                               
                               - 
                               
                                 ceil 
                                 ⁡ 
                                 
                                   ( 
                                   
                                     
                                       N 
                                       RB 
                                       HO 
                                     
                                     / 
                                     2 
                                   
                                   ) 
                                 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             &gt; 
                             1 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     N 
                     RB 
                     sb 
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             N 
                             
                               RB 
                               , 
                             
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             1 
                           
                         
                       
                       
                         
                           
                             
                               floor 
                               ⁢ 
                               
                                 { 
                                 
                                   
                                     ( 
                                     
                                       
                                         N 
                                         RB 
                                       
                                       - 
                                       
                                         N 
                                         RB 
                                         HO 
                                       
                                       - 
                                       
                                         
                                           N 
                                           RB 
                                           HO 
                                         
                                         ⁢ 
                                         mod 
                                         ⁢ 
                                         
                                             
                                         
                                         ⁢ 
                                         2 
                                       
                                     
                                     ) 
                                   
                                   / 
                                   
                                     N 
                                     sb 
                                   
                                 
                                 } 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             &gt; 
                             1 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       f 
                       hop 
                     
                     ⁡ 
                     
                       ( 
                       i 
                       ) 
                     
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             0 
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             1 
                           
                         
                       
                       
                         
                           
                             
                               
                                 { 
                                 
                                   
                                     
                                       f 
                                       hop 
                                     
                                     ⁡ 
                                     
                                       ( 
                                       
                                         i 
                                         - 
                                         1 
                                       
                                       ) 
                                     
                                   
                                   + 
                                   
                                     
                                       ∑ 
                                       
                                         k 
                                         = 
                                         
                                           
                                             10 
                                             ⁢ 
                                             i 
                                           
                                           + 
                                           1 
                                         
                                       
                                       
                                         
                                           10 
                                           ⁢ 
                                           i 
                                         
                                         + 
                                         9 
                                       
                                     
                                     ⁢ 
                                     
                                       
                                         c 
                                         ⁡ 
                                         
                                           ( 
                                           k 
                                           ) 
                                         
                                       
                                       ⁢ 
                                       
                                         2 
                                         
                                           k 
                                           - 
                                           
                                             ( 
                                             
                                               
                                                 10 
                                                 ⁢ 
                                                 i 
                                               
                                               + 
                                               1 
                                             
                                             ) 
                                           
                                         
                                       
                                     
                                   
                                 
                                 } 
                               
                               ⁢ 
                               mod 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               
                                 N 
                                 sb 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             2 
                           
                         
                       
                       
                         
                           
                             
                               
                                 { 
                                 
                                   
                                     
                                       f 
                                       hop 
                                     
                                     ⁡ 
                                     
                                       ( 
                                       
                                         i 
                                         - 
                                         1 
                                       
                                       ) 
                                     
                                   
                                   + 
                                   
                                     
                                       ( 
                                       
                                         
                                           ∑ 
                                           
                                             k 
                                             = 
                                             
                                               
                                                 10 
                                                 ⁢ 
                                                 i 
                                               
                                               + 
                                               1 
                                             
                                           
                                           
                                             
                                               10 
                                               ⁢ 
                                               i 
                                             
                                             + 
                                             9 
                                           
                                         
                                         ⁢ 
                                         
                                           
                                             c 
                                             ⁡ 
                                             
                                               ( 
                                               k 
                                               ) 
                                             
                                           
                                           ⁢ 
                                           
                                             2 
                                             
                                               k 
                                               - 
                                               
                                                 ( 
                                                 
                                                   
                                                     10 
                                                     ⁢ 
                                                     i 
                                                   
                                                   + 
                                                   1 
                                                 
                                                 ) 
                                               
                                             
                                           
                                         
                                       
                                       ) 
                                     
                                     ⁢ 
                                     
                                       mod 
                                       ⁡ 
                                       
                                         ( 
                                         
                                           
                                             N 
                                             sb 
                                           
                                           - 
                                           1 
                                         
                                         ) 
                                       
                                     
                                   
                                   + 
                                   1 
                                 
                                 } 
                               
                               ⁢ 
                               mod 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               
                                 N 
                                 sb 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             &gt; 
                             2 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
             
               
                 
                   
                     
                       f 
                       m 
                     
                     ⁡ 
                     
                       ( 
                       i 
                       ) 
                     
                   
                   = 
                   
                     { 
                     
                       
                         
                           
                             
                               i 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               mod 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               2 
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             
                               1 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               and 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               intra 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               and 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               inter 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               subframe 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               hopping 
                             
                           
                         
                       
                       
                         
                           
                             
                               CURRENT_TX 
                               ⁢ 
                               _NB 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               mod 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               2 
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             = 
                             
                               1 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               and 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               inter 
                               ⁢ 
                               
                                 - 
                               
                               ⁢ 
                               subframe 
                               ⁢ 
                               
                                   
                               
                               ⁢ 
                               hopping 
                             
                           
                         
                       
                       
                         
                           
                             
                               c 
                               ⁡ 
                               
                                 ( 
                                 
                                   10 
                                   ⁢ 
                                   i 
                                 
                                 ) 
                               
                             
                             , 
                           
                         
                         
                           
                             
                               N 
                               sb 
                             
                             &gt; 
                             1 
                           
                         
                       
                     
                   
                 
               
               
                 
                     
                 
               
             
           
         
       
     
     Note that n s  is a slot index. The slot index here does not mean the first slot or the second slot assigned to the user, but means, for example, a slot index within a radio frame. Further, N sb  is the number of subbands. The subband here means a lump in the case where a certain number of resource blocks are made a lump. Further, c(i) is a pseudo random sequence. Further, n VRB  is an index of a resource block temporarily assigned before the frequency hopping position is determined. Further, CURRENT_TX_NB is a transmission number of a transport block to be transmitted. Here, N sb , c(i), n VRB  and CURRENT_TX_NB are all notified as the frequency hopping setting information. 
     Information Indicating Frequency Band, Time Slot and Location where Frequency Hopping is Performed 
     The information indicating the frequency band, the time slot and the location where frequency hopping is performed is information for limiting the frequency band, the time and the location where the radio system  10  to be controlled performs frequency hopping. As described above, the control unit  320  can decide these information so that frequency hopping is performed only in a frequency band, a time slot and a location where there is a possibility of interference. By this means, the radio system  10  to be controlled can utilize more radio resources while reducing interference with other radio systems  10 . 
     [2-4. DB] 
       FIG. 32  is a block diagram illustrating an example of a logical configuration of the DB  400  according to the present embodiment. As illustrated in  FIG. 32 , the DB  400  according to the present embodiment includes a communication unit  410 , a control unit  420  and a storage unit  430 . 
     [2-4-1. Communication Unit] 
     The communication unit  410  is a communication interface which mediates communication between the DB  400  and other apparatuses. The communication unit  410  transmits/receives data with other apparatuses in a wired or wireless manner. 
     For example, the communication unit  410  performs communication with the communication control device  300 . For example, the communication unit  410  receives a request for the network information from the communication control device  300 . Further, the communication unit  410  transmits the DB registration information to the communication control device  300 . The communication unit  410  may utilize the same frequency as the use frequency band of each radio system  10  to transmit the DB registration information or may utilize a different frequency band. In addition, the communication unit  410  receives information indicating a frequency pattern from the communication control device  300 . 
     [2-4-2. Control Unit] 
     The control unit  420 , which functions as an arithmetic processing apparatus and a control apparatus, controls the whole operation within the DB  400  according to various kinds of programs. The control unit  420  is implemented with an electronic circuit such as, for example, a CPU and a microprocessor. Note that the control unit  420  may include a ROM which stores a program, an operation parameter, or the like, to be used and a RAM which temporarily stores a parameter, or the like, which changes as appropriate. 
     The control unit  420  returns the DB registration information stored in the storage unit  430  in response to a request for the network information received from the communication control device  300  by the communication unit  410 . Further, the control unit  420  controls the DB  400  to record the network information of each radio system  10  received from outside by the communication unit  410  as the DB registration information. For example, the control unit  420  records/updates the information indicating the frequency pattern received from the communication control device  300  by the communication unit  410  as the DB registration information. 
     Note that the control unit  420  can have a function as the control unit  320  of the communication control device  300 . 
     [2-4-3. Storage Unit] 
     The storage unit  430  is a unit which records and reproduces data in and from a predetermined recording medium. The storage unit  430  is implemented as, for example a hard disc drive (HDD). Of course, as the recording medium, there are various possible types of recording media such as a solid memory such as a flash memory, a memory card into which a solid memory is incorporated, an optical disc, a magneto optical disc, and a hologram memory. It is only necessary to configure the storage unit  430  so as to be able to execute recording and reproduction according to the employed recording medium. 
     The storage unit  430  stores the network information of each radio system  10  as the DB registration information. 
     [2-5. Sensor Apparatus] 
       FIG. 33  is a block diagram illustrating an example of a logical configuration of the sensor apparatus  500  according to the present embodiment. As illustrated in  FIG. 33 , the sensor apparatus  500  according to the present embodiment includes a communication unit  510 , a control unit  520  and a sensor unit  530 . 
     [2-5-1. Communication Unit] 
     The communication unit  510  is an interface which mediates communication between the sensor apparatus  500  and other apparatuses. The communication unit  510  transmits/receives data with other apparatuses in a wired or wireless manner. 
     For example, the communication unit  510  performs communication with the communication control device  300 . For example, the communication unit  510  receives a request for the network information from the communication control device  300 . Further, the communication unit  510  transmits the sensing information to the communication control device  300 . Note that the communication unit  510  may transmit the sensing information to the DB  400  and transmit the sensing information to the communication control device  300  via the DB  400 . The communication unit  410  may utilize the same frequency band as the use frequency band of each radio system  10  or may utilize a different frequency band to transmit the sensing information. 
     [2-5-2. Control Unit] 
     The control unit  520 , which functions as an arithmetic processing apparatus and a control apparatus, controls the whole operation within the sensor apparatus  500  according to various kinds of programs. The control unit  420  is implemented with an electronic circuit such as, for example, a CPU and a microprocessor. Note that the control unit  520  may include a ROM which stores a program, an operation parameter, or the like, to be used and a RAM which temporarily stores a parameter, or the like, which changes as appropriate. 
     For example, the control unit  520  controls the communication unit  510  to transmit the sensing information acquired by the sensor unit  530  to the communication control device  300  in response to a request for the network information from the communication control device  300 . 
     The control unit  520  may control the sensor unit  530  to periodically acquire the sensing information or may control the sensor unit  530  to acquire the sensing information by being triggered by reception of a request from the server  300 . The control unit  520  controls the communication unit  510  to transmit the acquired sensing information to the communication control device  300  periodically or in response to the request. The sensor apparatus  500  may have a storage unit for accumulating the acquired sensing information and transmit the accumulated sensing information to the communication control device  300 . 
     Note that the control unit  520  can have a function as the control unit  320  of the communication control device  300 . 
     [2-5-3. Sensor Unit] 
     The sensor unit  530  has a function of acquiring the sensing information. For example, the sensor unit  530  acquires the sensing information by measuring a received radio wave level for each frequency band. Note that the sensor unit  530  may acquire the sensing information for other radio systems  10  as well as the sensing information of the radio system  10  to be controlled. Further, the sensor unit  530  may sense a frequency band wider than the frequency band utilized by the radio system  10  to be controlled by the communication control device  300  based on control by the control unit  520 . In this case, the communication control device  300  can determine that there exists a radio system  10  which changes a use frequency band over time as in the radar system. Further, the sensor unit  530  may divide the frequency band into a plurality of bands and sense the bands. In this case, the communication control device  300  can perform processing of determining whether or not the radio system  10  changes the use frequency band over time more easily. 
     A configuration example of each component included in the communication system  1  according to the present embodiment has been described above. Subsequently, operation processing of the communication system  1  according to the present embodiment will be described with reference to  FIG. 34  to  FIG. 54 . 
     3. Operation Processing 
     [3-1. Radio System Control Processing] 
     First, the whole picture of the operation processing of the communication system  1  according to the present embodiment will be described with reference to  FIG. 34  and  FIG. 35 . The operation processing of the communication system  1  can take various forms according to which communication node functions as the communication control device, the transmitting station or the receiving station. AN example of the operation processing will be described below. 
     Processing Example 1 
       FIG. 34  is a sequence diagram illustrating an example of flow of radio system control processing executed in the communication system  1  according to the present embodiment. As illustrated in  FIG. 34 , this sequence involves the receiving station  100 , the transmitting station  200  and the server  300 . In this operation processing example, the server  300  functions as the communication control device. Further, it is assumed that the receiving station  100  and the transmitting station  200  are included in the radio system  10  to be controlled. 
     As illustrated in  FIG. 34 , first, in step S 102 , the server  300  transmits a request for the network information. The server  300 , for example, transmits the request to the transmitting station  200 , and the transmitting station  200  relays the received request to the receiving station  100 . 
     Then, in step S 104 , the transmitting station  200  returns the sensing information to the server  300 . The transmitting station  200  may periodically acquire the sensing information or may acquire the sensing information by being triggered by reception of the request from the server  300 . 
     In a similar manner, in step S 106 , the receiving station  100  returns the sensing information to the server  300 . In the example illustrated in  FIG. 34 , the receiving station  100  transmits the sensing information to the transmitting station  200 , and the transmitting station  200  relays the received sensing information to the server  300 . 
     Then, in step S 108 , the server  300  performs operation mode decision processing based on the received sensing information. The server  300  decides the frequency hopping mode or the normal mode as the operation mode of the radio system  10  to be controlled through the operation mode decision processing. Because the processing here will be described later in “3-2. Operation mode decision processing”, detailed description will be omitted here. An example of operation processing in the case where the server  300  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled will be described below. 
     In step S 110 , the server  300  performs frequency hopping setting decision processing. The server  300  decides a frequency hopping pattern to be utilized by the radio system  10  to be controlled through the frequency hopping setting decision processing and generates frequency hopping setting information. Because the processing here will be described later in “3-7. Frequency hopping setting decision processing”, detailed description will be omitted here. 
     Then, in step S 112 , the server  300  transmits the generated frequency hopping setting information. In the example illustrated in  FIG. 34 , the server  300  transmits the frequency hopping setting information to the transmitting station  200 , and the transmitting station  200  relays the received frequency hopping setting information to the receiving station  100 . 
     Then, in step S 114 , the transmitting station  200  decodes the received frequency hopping setting information. 
     In a similar manner, in step S 116 , the receiving station  100  decodes the received frequency hopping setting information. 
     Then, in step S 118 , the transmitting station  200  sets a frequency hopping scheme according to the decoded frequency hopping setting information. For example, the transmitting station  200  performs setting such that frequency hopping is performed by utilizing a radio resource according to a rule indicated in the frequency hopping setting information. 
     Then, in step S 120 , the transmitting station  200  transmits data while performing frequency hopping using the set frequency hopping scheme. For example, the transmitting station  200  transmits data while performing frequency hopping using the indicated frequency hopping pattern in a frequency band, time slot and location indicated in the frequency hopping setting information. 
     Then, in step S 122 , the receiving station  100  decodes data based on the decoded frequency hopping setting information. For example, the receiving station  100  performs decoding processing to acquire data assuming that the transmitting station  200  transmits data while performing frequency hopping using the frequency hopping setting information received in step S 112 . 
     An example of the flow of the radio system control processing has been described above. 
     Processing Example 2 
       FIG. 35  is a sequence diagram illustrating an example of flow of the radio system control processing executed in the communication system  1  according to the present embodiment. As illustrated in  FIG. 35 , this sequence involves the receiving station  100 , the transmitting station  200  and the DB  400 . In this operation processing example, the transmitting station  200  functions as the communication control device. Further, it is assumed that the receiving station  100  and the transmitting station  200  are included in the radio system  10  to be controlled. 
     As illustrated in  FIG. 35 , first, in step S 202 , the transmitting station  200  transmits a request for the network information to the DB  400 . 
     Then, in step S 204 , the transmitting station  200  acquires DB registration information from the DB  400 . 
     Then, in step S 206 , the transmitting station  200  performs operation mode decision processing based on the acquired DB registration information. The transmitting station  200  decides the frequency hopping mode or the normal mode as the operation mode of the radio system  10  to be controlled, that is, the radio system  10  to which the transmitting station  200  itself belongs through the operation mode decision processing. An example of operation processing in the case where the transmitting station  200  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled will be described below. 
     In step S 208 , the transmitting station  200  performs frequency hopping setting decision processing. The transmitting station  200  decides a frequency hopping pattern utilized by the radio system  10  to be controlled through the frequency hopping setting decision processing and generates frequency hopping setting information. 
     Then, in step S 210 , the transmitting station  200  transmits the generated frequency hopping setting information to the receiving station  100 . 
     Then, in step S 212 , the receiving station  100  decodes the received frequency hopping setting information. 
     Then, in step S 214 , the transmitting station  200  sets a frequency hopping scheme according to the generated frequency hopping setting information. 
     Then, in step S 216 , the transmitting station  200  transmits data while performing frequency hopping using the set frequency hopping scheme. 
     Then, in step S 218 , the receiving station  100  decodes data based on the decoded frequency hopping setting information. 
     An example of flow of the radio system control processing has been described above. 
     [3-2. Operation Mode Decision Processing] 
     Subsequently, operation mode decision processing by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 36  to  FIG. 42 . This processing can take various forms. An example of the processing will be described below. 
     Processing Example 1 
       FIG. 36  is a flowchart illustrating an example of flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 36 , first, in step S 302 , the control unit  320  determines whether or not it is necessary to acquire the network information. For example, the control unit  320  determines whether or not it is necessary to acquire the network information based on radio wave regulations such as the U.S. Federal SAS and Europe LSA, of the country where the radio system  10  is used. 
     In the case where it is determined that it is necessary to acquire the network information (S 302 /Yes), in step S 304 , the control unit  320  performs network information acquisition processing. Because the processing here will be described later in “3-3. Network information acquisition processing”, detailed description will be omitted here. The control unit  320  acquires the network information through the network information acquisition processing. 
     Then, in step S 306 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     On the other hand, when it is determined that it is not necessary to acquire the network information (S 302 /No), in step S 308 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. 
     Processing Example 2 
       FIG. 37  is a flowchart illustrating an example of the flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 37 , first, in step S 402 , the control unit  320  determines whether or not it is necessary to acquire the network information. 
     When it is determined that it is necessary to acquire the network information (S 402 /Yes), in step S 404 , the control unit  320  performs the network information acquisition processing. 
     Then, in step S 406 , the control unit  320  determines whether or not there is a possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled. For example, the control unit  320  determines a possibility of presence of other radio systems  10  with higher priority from the acquired network information. 
     In the case where it is determined that there is a possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled (S 406 /Yes), in step S 408 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     On the other hand, in the case where it is determined that it is not necessary to acquire the network information (S 402 /No) or in the case where it is determined that there is no possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled (S 406 /No), in step S 410 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. 
     Processing Example 3 
       FIG. 38  is a flowchart illustrating an example of the flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 38 , first, in step S 502 , the control unit  320  performs the network information acquisition processing. 
     Then, in step S 504 , the control unit  320  performs interference determination processing. The control unit  320  determines whether or not there are other radio systems  10  with which the radio system  10  to be controlled is likely to interfere through the interference determination processing. Because the processing here will be described later in “3-4. Interference determination processing”, detailed description will be omitted here. 
     In the case where it is determined that there are other radio systems  10  which are likely to interfere (S 506 /Yes), in step S 508 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     On the other hand, in the case where it is determined that there is no other radio system  10  which is likely to interfere (S 506 /No), in step S 510 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. 
     Processing Example 4 
       FIG. 39  is a flowchart illustrating an example of flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 39 , first, in step S 602 , the control unit  320  performs the network information acquisition processing. 
     Then, in step S 604 , the control unit  320  performs interference determination processing. 
     In the case where it is determined that there are other radio systems  10  which are likely to interfere (S 606 /Yes), in step S 608 , the control unit  320  determines whether or not there is a possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled. 
     In the case where it is determined that there is a possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled (S 608 /Yes), in step S 610 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     On the other hand, in the case where it is determined that there is no other radio system  10  which is likely to interfere (S 606 /No) or in the case where it is determined that there is no possibility of presence of other radio systems  10  with higher priority than that of the radio system  10  to be controlled (S 608 /No), in step S 612 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. 
     Processing Example 5 
       FIG. 40  is a flowchart illustrating an example of flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 40 , first, in step S 702 , the control unit  320  performs network information acquisition processing. 
     Then, in step S 704 , the control unit  320  calculates a ratio OBWR of overlapping of the use frequency bands. Because the processing here will be described later, detailed description will be omitted here. 
     Then, in step S 706 , the control unit  320  determines whether or not the ratio OBWR is greater than a threshold λ. 
     In the case where it is determined that the ratio OBWR is greater than the threshold λ (S 706 /Yes), in step S 708 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     In the case where the ratio OBWR is equal to or less than the threshold λ (S 706 /No), in step S 710 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. Here, an example of specific flow of ratio OBWR calculation processing in step S 704  will be described with reference to  FIG. 41 . 
       FIG. 41  is a flowchart illustrating an example of flow of calculation processing of a ratio of overlapping of the use frequency bands executed in the communication control device  300  according to the present embodiment. Note that, in this flowchart, the ratio OBWR calculation processing will be described using symbols F 1 H, F 1 L, F 2 H and F 2 L used in  FIG. 24  to  FIG. 27 . 
     As illustrated in  FIG. 41 , first, in step S 802 , the control unit  320  determines whether or not conditions of (F 1 H&lt;F 2 L) or (F 2 H&lt;F 1 L) are satisfied. In the case where it is determined that the conditions are satisfied (S 802 /Yes), in step S 804 , the control unit  320  calculates OBWR=0.0. On the other hand, in the case where it is determined that the conditions are not satisfied (S 802 /No), the processing proceeds to step S 806 . 
     In step S 806 , the control unit  320  determines whether or not conditions of (F 1 H≥F 2 L) and (F 2 H&gt;F 1 L) are satisfied. In the case where it is determined that the conditions are satisfied (S 806 /Yes), in step S 808 , the control unit  320  calculates OBWR=(F 1 H−F 2 L)/(F 1 H−F 1 L). On the other hand, in the case where it is determined that the conditions are not satisfied (S 806 /No), the processing proceeds to step S 810 . 
     In step S 810 , the control unit  320  determines whether or not conditions of (F 2 H≥F 1 L) and (F 1 H&gt;F 2 L) are satisfied. In the case where it is determined that the conditions are satisfied (S 810 /Yes), in step S 812 , the control unit  320  calculates OBWR=(F 1 H−F 2 L)/(F 1 H−F 1 L). On the other hand, in the case where it is determined that the conditions are not satisfied (S 810 /No), the processing proceeds to step S 814 . 
     In step S 814 , the control unit  320  determines whether or not conditions of (F 1 L&lt;F 2 L) and (F 1 H&gt;F 2 H) or conditions of (F 2 L≤F 1 L) and (F 2 H≥F 1 H) are satisfied. In the case where it is determined that the conditions are satisfied (S 814 /Yes), in step S 816 , the control unit  320  calculates OBWR=(F 2 H−F 2 L)/(F 1 H−F 1 L). On the other hand, in the case where it is determined that the conditions are not satisfied (S 810 /No), the processing proceeds to step S 804 . Note that because it is difficult to assume that the conditions are not satisfied, the control unit  320  may omit determination processing in step S 814 , and the processing may proceed to step S 816 . 
     The example of the ratio OBWR calculation processing has been described above. 
     Processing Example 6 
       FIG. 42  is a flowchart illustrating an example of flow of the operation mode decision processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 42 , first, in step S 902 , the control unit  320  performs network information acquisition processing. 
     Then, in step S 904 , the control unit  320  performs interference determination processing. 
     In the case where it is determined that there are other ratio systems  10  which are likely to interfere (S 906 /Yes), in step S 908 , the control unit  320  calculates a ratio OBWR of overlapping of the use frequency bands. 
     Then, in step S 910 , the control unit  320  determines whether or not the ratio OBWR is greater than the threshold λ. 
     In the case where it is determined that the ratio OBWR is greater than the threshold λ (S 910 /Yes), in step S 912 , the control unit  320  decides the frequency hopping mode as the operation mode of the radio system  10  to be controlled. 
     In the case where it is determined that the ratio OBWR is equal to or less than the threshold λ (S 910 /No), or in the case where it is determined that there is no other radio system  10  which is likely to interfere (S 906 /No), in step S 914 , the control unit  320  decides the normal mode as the operation mode of the radio system  10  to be controlled. 
     An example of the flow of the operation mode decision processing has been described above. 
     [3-3. Network Information Acquisition Processing] 
     Subsequently, network information acquisition processing by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 43 . This processing can take various forms. For example, the communication control device  300  may acquire the network information at a timing at which it is necessary to acquire the network information, or at a timing at which the network information is used for the operation mode decision processing, the interference determination processing, or the like. Other than above, the communication control device  300  may periodically acquire the network information. An example in the case where the network information is periodically acquired will be described below. 
       FIG. 43  is a flowchart illustrating an example of flow of the network information acquisition processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 43 , first, in step S 1002 , the control unit  320  sets a timer for acquiring the network information. 
     Then, in step S 1002 , the control unit  320  stands by until the set timer expires (S 1006 /No). 
     In the case where the timer expires (S 1006 /Yes), the control unit  320  acquires the network information. For example, the control unit  320  transmits a request for the network information via the communication unit  310 . Then, the control unit  320  acquires at least one of the DB registration information returned from the DB  400  and the sensing information returned from the sensor apparatus  500 . 
     An example of the flow of the network information acquisition processing has been described above. 
     [3-4. Interference Determination Processing] 
     Subsequently, the interference determination processing by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 44 . This processing can take various forms. An example of the processing will be described below. 
       FIG. 44  is a flowchart illustrating an example of the interference determination processing executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 44 , first, in step S 1102 , the control unit  320  determines whether or not the radio system  10  to be subjected to interference determination processing utilizes the same frequency band as the use frequency band of the radio system  10  to be controlled. This determination is performed, for example, with reference to the DB registration information. Note that the control unit  320  may determine that the radio systems utilize the same frequency band in the case where the use frequency bands partially overlap as in the examples illustrated in  FIG. 24  to  FIG. 27  even if the use frequency bands are not completely the same. Further, the control unit  320  may determine that the radio systems utilize the same frequency band in the case where a difference between the use frequency bands falls within a predetermined range even if the use frequency bands do not overlap. 
     In the case where it is determined that the radio systems utilize the same frequency bands (S 1102 /Yes), in step S 1104 , the control unit  320  determines whether or not the radio system  10  to be subjected to interference determination processing operates at the same time as the use frequency band of the radio system  10  to be controlled. This determination is performed, for example, with reference to the DB registration information. Note that the control unit  320  may determine that the radio systems operate at the same time in the case where the operating time partially overlaps even if the operating time is not completely the same. Further, the control unit  320  may determine that the radio systems operate at the same time in the case where a difference in the time falls within a predetermined range even if the time does not overlap. 
     In the case where it is determined that the radio systems operate at the same time (S 1104 /Yes), in step S 1106 , the control unit  320  determines whether or not the radio system  10  to be subjected to interference determination processing operates at the same location as the use frequency band of the radio system  10  to be controlled. This determination is performed, for example, with reference to the DB registration information. Note that the control unit  320  may determine that the radio systems operate at the same location in the case where the locations partially overlap even if the operating locations are not completely the same. Further, the control unit  320  may determine that the radio systems operate at the same location in the case where a difference in the operating locations falls within a predetermined range even if the operating locations do not overlap. 
     In the case where it is determined that the radio systems operate at the same location (S 1106 /Yes), in step S 1108 , the control unit  320  determines that there is a possibility that the radio system  10  to be controlled may interfere with the radio system  10  to be subjected to interference determination processing. 
     On the other hand, in the case where it is determined that the radio systems operate at different locations (S 1106 /No), in step S 1110 , the control unit  320  determines that there is no possibility that the radio system  10  to be controlled interferes with the radio system  10  to be subjected to interference determination processing. Further, in the case where it is determined that the radio systems utilize different frequency bands (S 1102 /No) or in the case where it is determined that the radio systems operate at different time (S 1104 /Yes), the control unit  320  determines that there is no possibility of interference in a similar manner. 
     An example of the flow of the interference determination processing has been described above. 
     While, in this example, an example where determination is performed based on the DB registration information has been described, determination can be also performed in a similar manner based on the sensing information. In the case where determination is based on the sensing information, in the processing in step S 1102 , the control unit  320  determines whether or not the use frequency bands are the same based on the sensing information. Because the processing here will be described later in “3-5. Overlapping determination processing of use frequency bands”, detailed description will be omitted here. Note that, in the case where the receiving station  100  or the transmitting station  200  to be controlled functions as the sensor apparatus  500 , determination as to the location and the time may be omitted. 
     [3-5. Overlapping Determination Processing of Use Frequency Bands] 
     Subsequently, overlapping determination processing of use frequency bands based on the sensing information by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 45  to  FIG. 47 . This processing can take various forms. An example of the processing will be described below. 
     Processing Example 1 
       FIG. 45  is a flowchart illustrating an example of flow of the overlapping determination processing of use frequency bands executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 45 , first, in step S 1202 , the control unit  320  determines whether or not other radio systems  10  which utilize the same frequency band as the use frequency band of the radio system  10  to be controlled are detected. 
     In the case where it is determined that other radio systems  10  which utilize the same frequency band are detected (S 1202 /Yes), in step S 1204 , the control unit  320  determines that there is a radio system  10  which utilizes the same frequency band. 
     On the other hand, in the case where it is determined that other radio systems  10  which utilize the same frequency band are not detected (S 1202 /No), in step S 1206 , the control unit  320  determines whether or not other radio systems  10  which utilize bands within a predetermined range from the same frequency band as the use frequency band of the radio system  10  to be controlled are detected. 
     In the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band is detected (S 1206 /Yes), in step S 1204 , the control unit  320  determines that there is a radio system  10  which utilizes the same frequency band. 
     On the other hand, in the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band are not detected (S 1206 /No), in step S 1208 , the control unit  320  determines that there is no radio system  10  which utilizes the same frequency band. 
     An example of the flow of the overlapping determination processing of use frequency bands based on the sensing information has been described above. 
     Processing Example 2 
       FIG. 46  is a flowchart illustrating an example of the flow of the overlapping determination processing of use frequency bands executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 46 , because the processing from step S 1302  to step S 1306  is as described with reference to  FIG. 45 , description will not be provided again. 
     In step S 1306 , in the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band are detected (S 1306 /Yes), in step S 1308 , the control unit  320  determines whether or not the other radio systems  10  change the use frequency bands over time. Because the processing here will be described later in “3-6. Temporal change determination processing of use frequency band”, detailed description will be omitted here. 
     In the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band change the use frequency bands over time (S 1308 /Yes), in step S 1304 , the control unit  320  determines that there is a radio system  10  which utilizes the same frequency band. 
     On the other hand, in the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band do not change the use frequency bands over time (S 1308 /No), in step S 1310 , the control unit  320  determines that there is no radio system  10  which utilizes the same frequency band. 
     An example of the flow of the overlapping determination processing of use frequency bands based on the sensing information has been described above. 
     Processing Example 3 
       FIG. 47  is a flowchart illustrating an example of flow of the overlapping determination processing of use frequency bands executed in the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 47 , because the processing from step S 1402  to S 1408  is as described with reference to  FIG. 46 , description will not be provided again. 
     In the case where it is determined in step S 1408  that other radio systems  10  which utilize bands within a predetermined range from the same frequency band change the use frequency bands over time (S 1408 /Yes), in step S 1410 , the control unit  320  determines whether or not the other radio systems  10  change the use frequency bands over time in a direction approaching the use frequency band of the radio system to be controlled. 
     In the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band changes the use frequency band over time in a direction approaching the use frequency band of the radio system to be controlled (S 1410 /Yes), in step S 1404 , the control unit  320  determines that there is a radio system  10  which utilizes the same frequency band. 
     On the other hand, in the case where it is determined that other radio systems  10  which utilize bands within a predetermined range from the same frequency band change the use frequency band over time in a direction away from the use frequency band of the radio system to be controlled (S 1410 /No), in step S 1412 , the control unit  320  determines that there is no radio system  10  which utilizes the same frequency band. 
     An example of the flow of the overlapping determination processing of use frequency bands based on the sensing information has been described above. 
     [3-6. Temporal Change Determination Processing of Use Frequency Band] 
     Subsequently, temporal change determination processing of use frequency band based on the sensing information by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 48  and  FIG. 49 . This processing can take various forms. An example of the processing will be described below. 
     Processing Example 1 
       FIG. 48  is a flowchart illustrating an example of flow of the temporal change determination processing of the use frequency band executed at the communication control device  300  according to the present embodiment. Note that determination processing in the case where a bandwidth is discretely sensed described above with reference to  FIG. 23  will be described using this flowchart. Symbols #-N to #N indicate indexes of the bandwidths. 
     As illustrated in  FIG. 48 , first, in step S 1502 , the control unit  320  determines whether or not other radio systems  10  are detected at a bandwidth #i at time t. 
     In the case where other radio systems  10  are detected at the bandwidth #i at time t (S 1502 /Yes), in step S 1504 , the control unit  320  determines whether or not the radio system is detected at the bandwidth #i+n at time t+t′. Note that in the case where other radio systems  10  are not detected at the bandwidth #i at time t (S 1502 /No), the processing proceeds to subsequent step S 1512 . 
     In the cased where the radio system is detected at the bandwidth #i+n at time t+t′ (S 1504 /Yes), in step S 1506 , the control unit  320  determines that the detected radio system changes the use frequency band over time from low to high. 
     On the other hand, in the case where the radio system is not detected at the bandwidth #i+n at time t+t′ (S 1504 /No), in step S 1508 , the control unit  320  determines whether or not the radio system is detected at the bandwidth #i−m at time t+t′. 
     In the case where the radio system is detected at the bandwidth #i−m at time t+t′ (S 1508 /Yes), in step S 1510 , the control unit  320  determines that the detected radio system changes the use frequency band over time from high to low. 
     In the case where the radio system is not detected at the bandwidth #i−m at time t+t′ (S 1508 /No), in step S 1512 , the control unit  320  determines that the detected radio system does not change the use frequency band over time. 
     An example of the flow of the temporal change determination processing of the use frequency band based on the sensing information has been described above. 
     Processing Example 2 
       FIG. 49  is a flowchart illustrating an example of flow of the temporal change determination processing of the use frequency band executed at the communication control device  300  according to the present embodiment. Note that determination processing in the case where a bandwidth is discretely sensed described above with reference to  FIG. 23  will be described using this flowchart. Symbols #-N to #N indicate indexes of bandwidths. 
     As illustrated in  FIG. 49 , because the processing in steps S 1502 , S 1504 , S 1506 , S 1508 , S 1510  and S 1512  is as described above with reference to  FIG. 48 , description will not be provided again. In this processing example, steps S 1505  and S 1509  are added to the processing example described with reference to  FIG. 48 . 
     In the case where the radio system is detected at the bandwidth #i+n at time t+t′ (S 1504 /Yes), in step S 1505 , the control unit  320  determines whether or not the radio system is detected at a bandwidth #i+2n at time t+2t′. In the case where the radio system is detected at the bandwidth #i+2n at time t+2t′ (S 1505 /Yes), the processing proceeds to step S 1506 . Further, in the case where the radio system is not detected at the bandwidth #i+2n at time t+2t′ (S 1505 /No), the processing proceeds to step S 1512 . 
     In the case where the radio system is detected at the bandwidth #i-m at time t+t′ (S 1508 /Yes), in step S 1509 , the control unit  320  determines whether or not the radio system is detected at a bandwidth #i−2m at time t+2t′. In the case where the radio system is detected at the bandwidth #i−2m at time t+2t′ (S 1509 /Yes), the processing proceeds to step S 1510 . Further, in the case where the radio system is not detected at the bandwidth #i−2m at time t+2t′ (S 1509 /No), the processing proceeds to step S 1512 . 
     An example of the flow of the temporal change determination processing of the use frequency band based on the sensing information has been described above. 
     As described in this processing example, the control unit  320  can confirm a changing state of the frequency band a plurality of times. Further, the control unit  320  can repeat such temporal change determination processing. By this means, the control unit  320  can determine whether or not the radio system  10  changes the use frequency band over time with high accuracy. Note that, while, in  FIG. 49 , the changing state of the frequency band is confirmed at equal intervals, that is, time t, t+t′, t+2t′, the changing state may be confirmed at different intervals. In a similar manner, while, in  FIG. 49 , the changing state of the frequency band is confirmed at equal intervals, that is, bands # 1 , #i+n, #i+2n, the changing state may be confirmed at different intervals. 
     [3-7. Frequency Hopping Setting Decision Processing] 
     Subsequently, frequency hopping setting information decision processing by the communication control device  300  according to the present embodiment will be described with reference to  FIG. 50  to  FIG. 52 . This processing can take various forms. An example of the processing will be described below. 
     Processing Example 1 
       FIG. 50  is a flowchart illustrating an example of flow of the frequency hopping setting information decision processing executed at the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 50 , first, in step S 1602 , the control unit  320  decides a radio resource utilization scheme at a portion where the use frequency band of the radio system  10  to be controlled overlaps with the use frequency bands of other radio systems  10 . For example, the control unit  320  performs decision such that the radios system  10  to be controlled performs frequency hopping at the portion where the use frequency bands overlap and decides a hopping pattern. Note that, in the case where there is no overlapped portion, the control unit  320  omits this processing. 
     Subsequently, in step S 1604 , the control unit  320  decides a radio resource utilization scheme at a portion where the use frequency band of the radio system  10  to be controlled does not overlap with the use frequency bands of other radio systems  10 . For example, the control unit  320  decides a range of the frequency band utilized by the radio system  10  to be controlled without frequency hopping being performed, among the portion where the use frequency bands do not overlap. The control unit  320  may perform decision such that frequency hopping is performed also in the portion where the use frequency bands do not overlap. Note that, in the case where there is no portion where the use frequency bands do not overlap, the control unit  320  omits this processing. 
     Then, in step S 1606 , the control unit  320  generates frequency hopping setting information. The frequency hopping setting information includes information indicating the frequency band in which frequency hopping is performed, the frequency hopping pattern and the frequency band utilized without frequency hopping being performed, decided in the above-described steps S 1602  to S 1606 . Note that the control unit  320  may decide a time slot, a location, or the like, in which the radio system  10  to be controlled performs frequency hopping according to information of the radio system  10  which is likely to interfere, and the frequency hopping setting information may include information indicating these time slots, the location, or the like. 
     An example of the flow of the frequency hopping setting information decision processing has been described above. 
     Processing Example 2 
       FIG. 51  is a flowchart illustrating an example of flow of the frequency hopping setting information decision processing executed at the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 51 , first, in step S 1702 , the control unit  320  determines whether or not information relating to other radio systems is updated. For example, the control unit  320  inquires about whether or not the information is updated to the DB  400  via the communication unit  310 . 
     In the case where it is determined that the information is not updated (S 1702 /No), the processing returns to step S 1702 . 
     On the other hand, in the case where it is determined that the information is updated (S 1702 /Yes), the processing proceeds to step S 1704 . Because the processing from steps S 1704  to S 1708  is the same as the processing from steps S 1602  to S 1606  described above with reference to  FIG. 50 , description will not be provided again. 
     In this manner, the frequency hopping setting information decision processing may be regularly executed. Other than above, the frequency hopping setting information decision processing may be triggered by an arbitrary event other than updating of the information. For example, the frequency hopping setting information determination processing may be executed by being triggered by determination that there are other radio systems  10  from the network information. 
     An example of the flow of the frequency hopping setting information decision processing has been described above. 
     In the frequency hopping setting information decision processing in the above-described steps S 1602  ( FIG. 50 ) and S 1704  ( FIG. 51 ), upon decision of the frequency hopping pattern, information of frequency hopping patterns utilized by other radio systems  10  can be taken into account. The frequency hopping pattern decision processing in such a case will be described below with reference to  FIG. 52 . 
       FIG. 52  is a flowchart illustrating an example of flow of frequency hopping pattern decision processing executed at the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 52 , first, in step S 1802 , the control unit  320  determines whether or not frequency hopping patterns of other radio systems  10  are known. For example, the control unit  320  determines whether or not the frequency hopping patterns of other radio systems  10  are known with reference to the acquired network information. 
     In the case where the frequency hopping patterns are known (S 1802 /Yes), in step S 1804 , the control unit  320  determines whether or not there is a frequency hopping pattern which is not utilized by other radio systems  10 . 
     In the case where there is a frequency hopping pattern which is not utilized (S 1804 /Yes), in step S 1806 , the control unit  320  decides a pattern to be utilized among frequency hopping patterns which are not utilized by other radio systems  10 . 
     On the other hand, in the case where it is determined that the frequency hopping patterns of other radio systems  10  are not known (S 1802 /No), or in the case where although the frequency hopping patterns are known, there is no frequency hopping pattern which is not utilized (S 1804 /No), in step S 1808 , the control unit  320  decides a pattern to be utilized without taking into account the frequency hopping patterns utilized by other radio systems  10 . 
     An example of the flow of the frequency hopping pattern decision processing has been described above. 
     [3-8. DB Registration Information Registration Processing] 
     Subsequently, registration processing of the DB registration information to be registered in the DB  400  according to the present embodiment will be described with reference to  FIG. 53  and  FIG. 54 . First, registration processing of information indicating the frequency hopping pattern in the DB  400  will be described with reference to  FIG. 53 . This processing can take various forms. An example of the forms of the processing will be described below. 
       FIG. 53  is a sequence diagram illustrating an example of flow of the DB registration information registration processing executed in the communication system  1  according to the present embodiment. As illustrated in  FIG. 53 , this sequence involves an MME  300 A, the DB  400  and the base station  300 B. The MME  300 A and the base station  300 B belong to different radio systems  10  and function as the communication control device  300  which is to control the radio systems  10  to which the MME  300 A and the base station  300 B respectively belong. 
     In steps S 1902  to S 1908 , the MME  300 A performs the processing similar to the processing from steps S 202  to S 208  described above with reference to  FIG. 35 . 
     After step S 1908 , in step S 1910 , the MME  300 A transmits information indicating the frequency hopping pattern decided in step S 1908  to the DB  400 . 
     Then, in step S 1912 , the DB  400  registers the received information indicating the frequency hopping pattern. In this event, the DB  400  stores the received information indicating the frequency hopping pattern as the DB registration information of the radio system  10  to which the MME  300 A which is a transmission source, belongs. 
     Subsequently, in steps S 1914  to S 1920 , the base station  300 B performs the processing similar to the processing from steps S 202  to S 208  described above with reference to  FIG. 35 . Here, the DB registration information received by the base station  300 B in step S 1916  includes the information indicating the frequency hopping pattern utilized by the radio system  10  to which the MME  300 A belongs. Therefore, in the frequency hopping setting decision processing in step S 1920 , the base station  300 B decides a frequency hopping pattern to be utilized among patterns other than the frequency hopping pattern utilized by the radio system  10  to which the MME  300 A belongs. 
     Then, in step S 1922 , the base station  300 B transmits information indicating the frequency hopping pattern decided in step S 1920  to the DB  400 . 
     Then, in step S 1924 , the DB  400  registers the received information indicating the frequency hopping pattern. 
     An example of the flow of the DB registration information registration processing has been described above. 
     The information indicating the frequency hopping pattern transmitted in the above-described steps S 1910  and S 1922  ( FIG. 53 ) can change according to whether or not each radio system  10  performs frequency hopping. An example of processing of transmitting information indicating the frequency hopping pattern will be described below with reference to  FIG. 54 . 
       FIG. 54  is a flowchart illustrating an example of flow of the processing of transmitting information indicating the frequency hopping pattern executed at the communication control device  300  according to the present embodiment. 
     As illustrated in  FIG. 54 , first, in step S 2002 , the control unit  320  performs the operation mode decision processing. 
     Then, in step S 2004 , the control unit  320  determines whether or not operation is performed in the frequency hopping mode. 
     In the case where it is determined that operation is performed in the frequency hopping mode (S 2004 /Yes), in step S 2006 , the control unit  320  performs the frequency hopping setting decision processing. 
     Then, in step S 2008 , the communication unit  310  notifies the DB  400  of the information indicating the frequency hopping pattern decided to be utilized by the control unit  320  in step S 2006 . 
     On the other hand, in the case where it is determined that operation is not performed in the frequency hopping mode (S 2004 /No), in step S 2010 , the communication unit  310  notifies the DB  400  that operation is performed in the normal mode. Note that, in the case where the DB  400  is not notified of information indicating the frequency hopping pattern, and in the case where it is regarded that frequency hopping is not performed in the radio system  10 , this step may be omitted. 
     An example of the processing of transmitting information indicating the frequency hopping pattern has been described above. 
     [3-9. Transmission Setting Switching Processing] 
     Subsequently, transmission setting switching processing by the transmitting station  200  according to the present embodiment will be described with reference to  FIG. 55 . 
       FIG. 55  is a flowchart illustrating an example of flow of the transmission setting switching processing executed at the transmitting station  200  according to the present embodiment. 
     As illustrated in  FIG. 55 , first, in step S 2102 , the control unit  220  of the transmitting station  200  determines whether or not to apply frequency hopping. For example, the control unit  220  performs this determination with reference to the frequency hopping setting information notified from the communication control device  300 . 
     In the case where it is determined to apply frequency hopping (S 2102 /Yes), the control unit  220  sets a filtering coefficient for frequency hopping ON (step S 2104 ), sets up-sampling ON (step S 2106 ) and sets CP addition OFF (step S 2108 ). 
     On the other hand, in the case where it is determined not to apply frequency hopping (S 2102 /No), the control unit  220  sets a filtering coefficient for frequency hopping OFF (step S 2110 ), sets up-sampling OFF (step S 2112 ), and sets CP addition ON (step S 2114 ). Note that the filtering coefficient for frequency hopping OFF may be a filtering coefficient for normal OFDM, for example, expressed in the above-described equation 2. 
     Note that, while, in this flow, the control unit  220  sets frequency hopping ON/OFF as determination criteria for ON/OFF of filtering and CP addition, the present technology is not limited to this example. For example, the control unit  220  may determine ON/OFF of filtering and CP addition according to, for example, whether or not there are other radio systems  10 , described above as a determination criterion for ON/OFF of frequency hopping. 
     4. Application Examples 
     The technology of the present disclosure is applicable to various products. For example, the communication control device  300  may be realized as any type of server such as a tower server, a rack server, and a blade server. The communication control device  300  may be a control module (such as an integrated circuit module including a single die, and a card or a blade that is inserted into a slot of a blade server) mounted on a server. 
     For example, a receiving station  100  or a transmitting station  200  may be realized as any type of evolved Node B (eNB) such as a macro eNB, and a small eNB. A small eNB may be an eNB that covers a cell smaller than a macro cell, such as a pico eNB, micro eNB, or home (femto) eNB. Instead, the receiving station  100  or the transmitting station  200  may be realized as any other types of base stations such as a NodeB and a base transceiver station (BTS). The receiving station  100  or the transmitting station  200  may include a main body (that is also referred to as a base station device) configured to control radio communication, and one or more remote radio heads (RRH) disposed in a different place from the main body. Additionally, various types of terminals to be discussed later may also operate as the receiving station  100  or the transmitting station  200  by temporarily or semi-permanently executing a base station function. 
     For example, the receiving station  100  or the transmitting station  200  may be realized as a mobile terminal such as a smartphone, a tablet personal computer (PC), a notebook PC, a portable game terminal, a portable/dongle type mobile router, and a digital camera, or an in-vehicle terminal such as a car navigation device. The receiving station  100  or the transmitting station  200  may also be realized as a terminal (that is also referred to as a machine type communication (MTC) terminal) that performs machine-to-machine (M2M) communication. Furthermore, the receiving station  100  or the transmitting station  200  may be a wireless communication module (such as an integrated circuit module including a single die) mounted on each of the terminals. 
     4.1. Application Example Regarding Server 
       FIG. 56  is a block diagram illustrating an example of a schematic configuration of a server  700  to which the technology of the present disclosure may be applied. The server  700  includes a processor  701 , a memory  702 , a storage  703 , a network interface  704 , and a bus  706 . 
     The processor  701  may be, for example, a central processing unit (CPU) or a digital signal processor (DSP), and controls functions of the server  700 . The memory  702  includes random access memory (RAM) and read only memory (ROM), and stores a program that is executed by the processor  701  and data. The storage  703  may include a storage medium such as a semiconductor memory and a hard disk. 
     The network interface  704  is a wired communication interface for connecting the server  700  to a wired communication network  705 . The wired communication network  705  may be a core network such as an Evolved Packet Core (EPC), or a packet data network (PDN) such as the Internet. 
     The bus  706  connects the processor  701 , the memory  702 , the storage  703 , and the network interface  704  to each other. The bus  706  may include two or more buses (such as a high speed bus and a low speed bus) each of which has different speed. 
     In the server  700  illustrated in  FIG. 56 , the communication unit  310  and the control unit  320  described using  FIG. 18  may be implemented at the processor  701 . For example, the server  700  can reduce interference with other radio systems  10  by the radio system  10  to be controlled by performing control such that frequency hopping is performed at the radio system  10  to be controlled. 
     4.2. Application Examples Regarding Base Stations 
     First Application Example 
       FIG. 57  is a block diagram illustrating a first example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied. An eNB  800  includes one or more antennas  810  and a base station device  820 . Each antenna  810  and the base station device  820  may be connected to each other via an RF cable. 
     Each of the antennas  810  includes a single or multiple antenna elements (such as multiple antenna elements included in an MIMO antenna), and is used for the base station device  820  to transmit and receive radio signals. The eNB  800  may include the multiple antennas  810 , as illustrated in  FIG. 57 . For example, the multiple antennas  810  may be compatible with multiple frequency bands used by the eNB  800 . Although  FIG. 57  illustrates the example in which the eNB  800  includes the multiple antennas  810 , the eNB  800  may also include a single antenna  810 . 
     The base station device  820  includes a controller  821 , a memory  822 , a network interface  823 , and a radio communication interface  825 . 
     The controller  821  may be, for example, a CPU or a DSP, and operates various functions of a higher layer of the base station device  820 . For example, the controller  821  generates a data packet from data in signals processed by the radio communication interface  825 , and transfers the generated packet via the network interface  823 . The controller  821  may bundle data from multiple base band processors to generate the bundled packet, and transfer the generated bundled packet. The controller  821  may have logical functions of performing control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. The control may be performed in corporation with an eNB or a core network node in the vicinity. The memory  822  includes RAM and ROM, and stores a program that is executed by the controller  821 , and various types of control data (such as a terminal list, transmission power data, and scheduling data). 
     The network interface  823  is a communication interface for connecting the base station device  820  to a core network  824 . The controller  821  may communicate with a core network node or another eNB via the network interface  823 . In that case, the eNB  800 , and the core network node or the other eNB may be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface  823  may also be a wired communication interface or a radio communication interface for radio backhaul. If the network interface  823  is a radio communication interface, the network interface  823  may use a higher frequency band for radio communication than a frequency band used by the radio communication interface  825 . 
     The radio communication interface  825  supports any cellular communication scheme such as Long Term Evolution (LTE) and LTE-Advanced, and provides radio connection to a terminal positioned in a cell of the eNB  800  via the antenna  810 . The radio communication interface  825  may typically include, for example, a baseband (BB) processor  826  and an RF circuit  827 . The BB processor  826  may perform, for example, encoding/decoding, modulating/demodulating, and multiplexing/demultiplexing, and performs various types of signal processing of layers (such as L1, medium access control (MAC), radio link control (RLC), and a packet data convergence protocol (PDCP)). The BB processor  826  may have a part or all of the above-described logical functions instead of the controller  821 . The BB processor  826  may be a memory that stores a communication control program, or a module that includes a processor and a related circuit configured to execute the program. Updating the program may allow the functions of the BB processor  826  to be changed. The module may be a card or a blade that is inserted into a slot of the base station device  820 . Alternatively, the module may also be a chip that is mounted on the card or the blade. Meanwhile, the RF circuit  827  may include, for example, a mixer, a filter, and an amplifier, and transmits and receives radio signals via the antenna  810 . 
     The radio communication interface  825  may include the multiple BB processors  826 , as illustrated in  FIG. 57 . For example, the multiple BB processors  826  may be compatible with multiple frequency bands used by the eNB  800 . The radio communication interface  825  may include the multiple RF circuits  827 , as illustrated in  FIG. 57 . For example, the multiple RF circuits  827  may be compatible with multiple antenna elements. Although  FIG. 57  illustrates the example in which the radio communication interface  825  includes the multiple BB processors  826  and the multiple RF circuits  827 , the radio communication interface  825  may also include a single BB processor  826  or a single RF circuit  827 . 
     Second Application Example 
       FIG. 58  is a block diagram illustrating a second example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied. An eNB  830  includes one or more antennas  840 , a base station device  850 , and an RRH  860 . Each antenna  840  and the RRH  860  may be connected to each other via an RF cable. The base station device  850  and the RRH  860  may be connected to each other via a high speed line such as an optical fiber cable. 
     Each of the antennas  840  includes a single or multiple antenna elements (such as multiple antenna elements included in an MIMO antenna), and is used for the RRH  860  to transmit and receive radio signals. The eNB  830  may include the multiple antennas  840 , as illustrated in  FIG. 58 . For example, the multiple antennas  840  may be compatible with multiple frequency bands used by the eNB  830 . Although  FIG. 58  illustrates the example in which the eNB  830  includes the multiple antennas  840 , the eNB  830  may also include a single antenna  840 . 
     The base station device  850  includes a controller  851 , a memory  852 , a network interface  853 , a radio communication interface  855 , and a connection interface  857 . The controller  851 , the memory  852 , and the network interface  853  are the same as the controller  821 , the memory  822 , and the network interface  823  described with reference to  FIG. 57 . 
     The radio communication interface  855  supports any cellular communication scheme such as LTE and LTE-Advanced, and provides radio communication to a terminal positioned in a sector corresponding to the RRH  860  via the RRH  860  and the antenna  840 . The radio communication interface  855  may typically include, for example, a BB processor  856 . The BB processor  856  is the same as the BB processor  826  described with reference to  FIG. 57 , except the BB processor  856  is connected to the RF circuit  864  of the RRH  860  via the connection interface  857 . The radio communication interface  855  may include the multiple BB processors  856 , as illustrated in  FIG. 58 . For example, the multiple BB processors  856  may be compatible with multiple frequency bands used by the eNB  830 . Although  FIG. 58  illustrates the example in which the radio communication interface  855  includes the multiple BB processors  856 , the radio communication interface  855  may also include a single BB processor  856 . 
     The connection interface  857  is an interface for connecting the base station device  850  (radio communication interface  855 ) to the RRH  860 . The connection interface  857  may also be a communication module for communication in the above-described high speed line that connects the base station device  850  (radio communication interface  855 ) to the RRH  860 . 
     The RRH  860  includes a connection interface  861  and a radio communication interface  863 . 
     The connection interface  861  is an interface for connecting the RRH  860  (radio communication interface  863 ) to the base station device  850 . The connection interface  861  may also be a communication module for communication in the above-described high speed line. 
     The radio communication interface  863  transmits and receives radio signals via the antenna  840 . The radio communication interface  863  may typically include, for example, the RF circuit  864 . The RF circuit  864  may include, for example, a mixer, a filter, and an amplifier, and transmits and receives radio signals via the antenna  840 . The radio communication interface  863  may include multiple RF circuits  864 , as illustrated in  FIG. 58 . For example, the multiple RF circuits  864  may support multiple antenna elements. Although  FIG. 58  illustrates the example in which the radio communication interface  863  includes the multiple RF circuits  864 , the radio communication interface  863  may also include a single RF circuit  864 . 
     In the eNB  800  and the eNB  830  illustrated in  FIG. 57  and  FIG. 58 , the communication unit  210  and the control unit  220  described using  FIG. 3  may be implemented at the radio communication interface  825  and the radio communication interface  855  and/or the radio communication interface  863 . Further, at least part of these functions may be implemented at the controller  821  and the controller  851 . For example, the eNB  800  and the eNB  830  can reduce interference with other radio systems  10  by transmitting data to the user terminal (receiving station  100 ) while performing frequency hopping based on an instruction from the communication control device  300 . 
     Further, in the eNB  800  and the eNB  830  illustrated in  FIG. 57  and  FIG. 58 , the communication unit  110  and the control unit  120  described using  FIG. 2  may be implemented at the radio communication interface  825  and the radio communication interface  855  and/or the radio communication interface  863 . Further, at least part of these functions may be implemented at the controller  821  and the controller  851 . For example, the eNB  800  and the eNB  830  can receive data transmitted by the user terminal (transmitting station  200 ) while frequency hopping is performed so as to reduce interference with other radio systems  10  by receiving the data based on an instruction from the communication control device  300 . 
     4.3. Application Examples Regarding Terminal Devices 
     First Application Example 
       FIG. 59  is a block diagram illustrating an example of a schematic configuration of a smartphone  900  to which the technology of the present disclosure may be applied. The smartphone  900  includes a processor  901 , a memory  902 , a storage  903 , an external connection interface  904 , a camera  906 , a sensor  907 , a microphone  908 , an input device  909 , a display device  910 , a speaker  911 , a radio communication interface  912 , one or more antenna switches  915 , one or more antennas  916 , a bus  917 , a battery  918 , and an auxiliary controller  919 . 
     The processor  901  may be, for example, a CPU or a system on a chip (SoC), and controls functions of an application layer and another layer of the smartphone  900 . The memory  902  includes RAM and ROM, and stores a program that is executed by the processor  901 , and data. The storage  903  may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface  904  is an interface for connecting an external device such as a memory card and a universal serial bus (USB) device to the smartphone  900 . 
     The camera  906  includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor  907  may include a group of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone  908  converts sounds that are input to the smartphone  900  to audio signals. The input device  909  includes, for example, a touch sensor configured to detect touch onto a screen of the display device  910 , a keypad, a keyboard, a button, or a switch, and receives an operation or an information input from a user. The display device  910  includes a screen such as a liquid crystal display (LCD) and an organic light-emitting diode (OLED) display, and displays an output image of the smartphone  900 . The speaker  911  converts audio signals that are output from the smartphone  900  to sounds. 
     The radio communication interface  912  supports any cellular communication scheme such as LTE and LTE-Advanced, and performs radio communication. The radio communication interface  912  may typically include, for example, a BB processor  913  and an RF circuit  914 . The BB processor  913  may perform, for example, encoding/decoding, modulating/demodulating, and multiplexing/demultiplexing, and performs various types of signal processing for radio communication. Meanwhile, the RF circuit  914  may include, for example, a mixer, a filter, and an amplifier, and transmits and receives radio signals via the antenna  916 . The radio communication interface  913  may also be a one chip module that has the BB processor  913  and the RF circuit  914  integrated thereon. The radio communication interface  912  may include the multiple BB processors  913  and the multiple RF circuits  914 , as illustrated in  FIG. 59 . Although  FIG. 59  illustrates the example in which the radio communication interface  913  includes the multiple BB processors  913  and the multiple RF circuits  914 , the radio communication interface  912  may also include a single BB processor  913  or a single RF circuit  914 . 
     Furthermore, in addition to a cellular communication scheme, the radio communication interface  912  may support another type of radio communication scheme such as a short-distance wireless communication scheme, a near field communication scheme, and a radio local area network (LAN) scheme. In that case, the radio communication interface  912  may include the BB processor  913  and the RF circuit  914  for each radio communication scheme. 
     Each of the antenna switches  915  switches connection destinations of the antennas  916  among multiple circuits (such as circuits for different radio communication schemes) included in the radio communication interface  912 . 
     Each of the antennas  916  includes a single or multiple antenna elements (such as multiple antenna elements included in an MIMO antenna), and is used for the radio communication interface  912  to transmit and receive radio signals. The smartphone  900  may include the multiple antennas  916 , as illustrated in  FIG. 59 . Although  FIG. 59  illustrates the example in which the smartphone  900  includes the multiple antennas  916 , the smartphone  900  may also include a single antenna  916 . 
     Furthermore, the smartphone  900  may include the antenna  916  for each radio communication scheme. In that case, the antenna switches  915  may be omitted from the configuration of the smartphone  900 . 
     The bus  917  connects the processor  901 , the memory  902 , the storage  903 , the external connection interface  904 , the camera  906 , the sensor  907 , the microphone  908 , the input device  909 , the display device  910 , the speaker  911 , the radio communication interface  912 , and the auxiliary controller  919  to each other. The battery  918  supplies power to blocks of the smartphone  900  illustrated in  FIG. 59  via feeder lines, which are partially shown as dashed lines in the figure. The auxiliary controller  919  operates a minimum necessary function of the smartphone  900 , for example, in a sleep mode. 
     In the smartphone  900  illustrated in  FIG. 59 , the communication unit  110  and the control unit  120  described using  FIG. 2  may be implemented at the radio communication interface  912 . Further, at least part of these functions may be implemented at the processor  901  or the auxiliary controller  919 . For example, the smartphone  900  can receive data transmitted by the base station (transmitting station  200 ) while frequency hopping is performed so as to reduce interference with other radio systems  10  by receiving the data based on an instruction from the communication control device  300 . 
     Further, in the smartphone  900  illustrated in  FIG. 59 , the communication unit  210  and the control unit  220  described using  FIG. 3  may be implemented at the radio communication interface  912 . Further, at least part of these functions may be implemented at the processor  901  or the auxiliary controller  919 . For example, the smartphone  900  can reduce interference with other radio systems  10  by transmitting data to the base station (receiving station  100 ) while performing frequency hopping based on an instruction from the communication control device  300 . 
     Second Application Example 
       FIG. 60  is a block diagram illustrating an example of a schematic configuration of a car navigation device  920  to which the technology of the present disclosure may be applied. The car navigation device  920  includes a processor  921 , a memory  922 , a global positioning system (GPS) module  924 , a sensor  925 , a data interface  926 , a content player  927 , a storage medium interface  928 , an input device  929 , a display device  930 , a speaker  931 , a radio communication interface  933 , one or more antenna switches  936 , one or more antennas  937 , and a battery  938 . 
     The processor  921  may be, for example, a CPU or a SoC, and controls a navigation function and another function of the car navigation device  920 . The memory  922  includes RAM and ROM, and stores a program that is executed by the processor  921 , and data. 
     The GPS module  924  uses GPS signals received from a GPS satellite to measure a position (such as latitude, longitude, and altitude) of the car navigation device  920 . The sensor  925  may include a group of sensors such as a gyro sensor, a geomagnetic sensor, and a barometric sensor. The data interface  926  is connected to, for example, an in-vehicle network  941  via a terminal that is not shown, and acquires data generated by the vehicle, such as vehicle speed data. 
     The content player  927  reproduces content stored in a storage medium (such as a CD and a DVD) that is inserted into the storage medium interface  928 . The input device  929  includes, for example, a touch sensor configured to detect touch onto a screen of the display device  930 , a button, or a switch, and receives an operation or an information input from a user. The display device  930  includes a screen such as a LCD or an OLED display, and displays an image of the navigation function or content that is reproduced. The speaker  931  outputs sounds of the navigation function or the content that is reproduced. 
     The radio communication interface  933  supports any cellular communication scheme such as LET and LTE-Advanced, and performs radio communication. The radio communication interface  933  may typically include, for example, a BB processor  934  and an RF circuit  935 . The BB processor  934  may perform, for example, encoding/decoding, modulating/demodulating, and multiplexing/demultiplexing, and performs various types of signal processing for radio communication. Meanwhile, the RF circuit  935  may include, for example, a mixer, a filter, and an amplifier, and transmits and receives radio signals via the antenna  937 . The radio communication interface  933  may be a one chip module having the BB processor  934  and the RF circuit  935  integrated thereon. The radio communication interface  933  may include the multiple BB processors  934  and the multiple RF circuits  935 , as illustrated in  FIG. 60 . Although  FIG. 60  illustrates the example in which the radio communication interface  933  includes the multiple BB processors  934  and the multiple RF circuits  935 , the radio communication interface  933  may also include a single BB processor  934  or a single RF circuit  935 . 
     Furthermore, in addition to a cellular communication scheme, the radio communication interface  933  may support another type of radio communication scheme such as a short-distance wireless communication scheme, a near field communication scheme, and a radio LAN scheme. In that case, the radio communication interface  933  may include the BB processor  934  and the RF circuit  935  for each radio communication scheme. 
     Each of the antenna switches  936  switches connection destinations of the antennas  937  among multiple circuits (such as circuits for different radio communication schemes) included in the radio communication interface  933 . 
     Each of the antennas  937  includes a single or multiple antenna elements (such as multiple antenna elements included in an MIMO antenna), and is used for the radio communication interface  933  to transmit and receive radio signals. The car navigation device  920  may include the multiple antennas  937 , as illustrated in  FIG. 60 . Although  FIG. 60  illustrates the example in which the car navigation device  920  includes the multiple antennas  937 , the car navigation device  920  may also include a single antenna  937 . 
     Furthermore, the car navigation device  920  may include the antenna  937  for each radio communication scheme. In that case, the antenna switches  936  may be omitted from the configuration of the car navigation device  920 . 
     The battery  938  supplies power to blocks of the car navigation device  920  illustrated in  FIG. 60  via feeder lines that are partially shown as dashed lines in the figure. The battery  938  accumulates power supplied form the vehicle. 
     In the car navigation device  920  illustrated in  FIG. 60 , the communication unit  110  and the control unit  120  described using  FIG. 2  may be implemented at the radio communication interface  933 . Further, at least part of these functions may be implemented at the processor  921 . For example, the car navigation device  920  can receive data transmitted by the base station (transmitting station  200 ) while frequency hopping is performed so as to reduce interference with other radio systems by receiving the data based on an instruction from the communication control device  300 . 
     Further, in the car navigation device  920  illustrated in  FIG. 60 , the communication unit  210  and the control unit  220  described using  FIG. 3  may be implemented at the radio communication interface  933 . Further, at least part of these functions may be implemented at the processor  921 . For example, the car navigation device  920  can reduce interference with other radio systems  10  by transmitting the data to the base station (receiving station  100 ) while performing frequency hopping based on an instruction from the communication control device  300 . 
     The technology of the present disclosure may also be realized as an in-vehicle system (or a vehicle)  940  including one or more blocks of the car navigation device  920 , the in-vehicle network  941 , and a vehicle module  942 . The vehicle module  942  generates vehicle data such as vehicle speed, engine speed, and trouble information, and outputs the generated data to the in-vehicle network  941 . 
     5. Conclusion 
     One embodiment of the present disclosure has been described in detail above with reference to  FIG. 1  to  FIG. 60 . As described above, the communication control device  300  according to the present embodiment communicates with an apparatus belonging to the radio system  10  to be controlled and controls whether or not the transmitting station  200  belonging to the radio system  10  to be controlled performs frequency hopping based on the network information of other radio systems  10 . For example, the communication control device  300  can reduce interference with other radio systems  10  by the radio system  10  to be controlled by deciding that frequency hopping is performed. Further, the communication control device  300  can maintain communication speed of the radio system  10  to be controlled by deciding that frequency hopping is not performed. 
     Further, the communication control device  300  according to the present embodiment controls whether or not the radio system  10  to be controlled performs frequency hopping based on priority of each radio system  10 . By this means, in the present embodiment, it is possible to reduce interference with a radio system having higher priority, and it is possible to improve communication quality of the radio system  10  to be controlled. 
     Further, the communication control device  300  according to the present embodiment controls the radio system  10  to be controlled so that frequency hopping is performed in a frequency band overlapping with the use frequency bands of other radio systems  10 . By this means, it is possible to reduce interference with other radio systems  10  by the radio system  10  to be controlled. Further, the radio system  10  to be controlled can utilize more radio resources while receiving interference from other radio systems  10 . 
     The preferred embodiment(s) of the present disclosure has/have been described above with reference to the accompanying drawings, whilst the present disclosure is not limited to the above examples. A person skilled in the art may find various alterations and modifications within the scope of the appended claims, and it should be understood that they will naturally come under the technical scope of the present disclosure. 
     The series of control processes carried out by each apparatus described in the present specification may be realized by software, hardware, or a combination of software and hardware. Programs that compose such software may be stored in advance for example on a storage medium (non-transitory medium) provided inside or outside each of the apparatus. As one example, during execution, such programs are written into RAM (Random Access Memory) and executed by a processor such as a CPU. 
     Note that it is not necessary for the processing described in this specification with reference to the flowchart to be executed in the order shown in the flowchart. Some processing steps may be performed in parallel. Further, some of additional steps can be adopted, or some processing steps can be omitted. 
     Further, the effects described in this specification are merely illustrative or exemplified effects, and are not limitative. That is, with or in the place of the above effects, the technology according to the present disclosure may achieve other effects that are clear to those skilled in the art based on the description of this specification. 
     Additionally, the present technology may also be configured as below. 
     (1) 
     A communication control device including: 
     a communication unit configured to communicate with an apparatus belonging to a first radio network; and 
     a control unit configured to control whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     (2) 
     The communication control device according to (1), 
     wherein the control unit controls whether or not frequency hopping is performed based on priority of the second radio network. 
     (3) 
     The communication control device according to (1) or (2), 
     wherein the control unit decides that frequency hopping is performed in a frequency band overlapping with a frequency band utilized by the second radio network. 
     (4) 
     The communication control device according to any one of (1) to (3), 
     wherein the control unit decides a hopping pattern of frequency hopping performed by the radio communication apparatus belonging to the first radio network. 
     (5) 
     The communication control device according to (4), 
     wherein the control unit decides a hopping pattern different from a hopping pattern of frequency hopping performed by the second radio network. 
     (6) 
     The communication control device according to (4) or (5), 
     wherein hopping in a frequency direction is defined in the hopping pattern in a unit of at least any of a subcarrier unit, a resource block unit and a component carrier unit. 
     (7) 
     The communication control device according to any one of (4) to (6), 
     wherein hopping in a time direction is defined in the hopping pattern in a unit of at least any of a symbol unit, a slot unit and a subframe unit. 
     (8) 
     The communication control device according to any one of (1) to (7), 
     wherein the control unit controls whether or not frequency hopping is performed based on whether or not there is a possibility that the first radio network interferes with the second radio network. 
     (9) 
     The communication control device according to (8), 
     wherein the control unit determines that there is a possibility of interference in the case where there is a possibility that a frequency band utilized by the first radio network at least partially overlaps with a frequency band utilized by the second radio network. 
     (10) 
     The communication control device according to (9), 
     wherein the control unit determines whether or not the second radio network changes the use frequency band over time based on information of the second radio network. 
     (11) 
     The communication control device according to (10), 
     wherein the control unit determines that there is a possibility of overlapping in the case where the second radio network changes the use frequency band over time. 
     (12) 
     The communication control device according to (11), 
     wherein the control unit determines that there is a possibility of overlapping in the case where a direction in which the second radio network changes the use frequency band over time is a direction approaching the frequency band utilized by the first radio network. 
     (13) 
     The communication control device according to (11) or (12), 
     wherein the control unit determines that there is no possibility of overlapping in the case where a direction in which the second radio network changes the use frequency band over time is a direction away from the frequency band utilized by the first radio network. 
     (14) 
     The communication control device according to any one of (9) to (13), 
     wherein the control unit determines that there is a possibility of interference in the case where an operating location of the first radio network at least partially overlaps with an operating location of the second radio network. 
     (15) 
     The communication control device according to any one of (9) to (14), 
     wherein the control unit determines that there is a possibility of interference in the case where an operating time slot of the first radio network at least partially overlaps with an operating time slot of the second radio network. 
     (16) 
     The communication control device according to any one of (1) to (15), 
     wherein the control unit controls whether or not frequency hopping is performed based on a ratio of overlapping between a frequency band utilized by the first radio network and a frequency band utilized by the second radio network. 
     (17) 
     The communication control device according to any one of (1) to (16), 
     wherein the control unit decides that frequency hopping is performed in the case where it is required under law to acquire information of the second radio network. 
     (18) 
     The communication control device according to any one of (1) to (17), 
     wherein the communication unit acquires information of the second radio network from a storage apparatus. 
     (19) 
     The communication control device according to any one of (1) to (18), 
     wherein the communication unit acquires information of the second radio network from a sensor apparatus. 
     (20) 
     The communication control device according to any one of (1) to (19), 
     wherein information of the second radio network includes information indicating priority of the second radio network. 
     (21) 
     The communication control device according to any one of (1) to (20), 
     wherein information of the second radio network includes information relating to a frequency band utilized by the second radio network. 
     (22) 
     The communication control device according to any one of (1) to (21), 
     wherein information of the second radio network includes information relating to a location where the second radio network is operated. 
     (23) 
     The communication control device according to any one of (1) to (22), 
     wherein information of the second radio network includes information relating to a time slot in which the second radio network is operated. 
     (24) 
     The communication control device according to any one of (1) to (23), 
     wherein the control unit controls the radio communication apparatus belonging to the first radio network to transmit data while performing frequency hopping. 
     (25) 
     The communication control device according to (24), 
     wherein the control unit performs control so that information relating to frequency hopping performed by the radio communication apparatus belonging to the first radio network is transmitted to other radio communication apparatuses belonging to the first radio network. 
     (26) 
     The communication control device according to (25), 
     wherein the information relating to the frequency hopping is broadcasted by the radio communication apparatus belonging to the first radio network. 
     (27) 
     The communication control device according to (25), 
     wherein the information relating to the frequency hopping is unicasted by the radio communication apparatus belonging to the first radio network. 
     (28) 
     The communication control device according to (25), 
     wherein the information relating to the frequency hopping is transmitted by the radio communication apparatus belonging to the first radio network using a control channel for each communication link. 
     (29) 
     The communication control device according to any one of (1) to (23), 
     wherein the control unit controls other radio communication apparatuses belonging to the first radio network to receive data transmitted by the radio communication apparatus belonging to the first radio network while frequency hopping is performed, based on information relating to the frequency hopping. 
     (30) 
     The communication control device according to any one of (1) to (23), 
     wherein the control unit controls a storage apparatus to store information of the second radio network. 
     (31) 
     The communication control device according to any one of (1) to (23), 
     wherein the control unit controls a sensor apparatus configured to sense information of the second radio network to sense a frequency band wider than a frequency band utilized by the first radio network. 
     (32) 
     The communication control device according to (31), 
     wherein the control unit controls the sensor apparatus to divide the frequency band into a plurality of bands and sense the bands. 
     (33) 
     A communication control method including: 
     communicating with an apparatus belonging to a first radio network; and 
     controlling whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     (34) 
     A program causing a computer to function as: 
     a communication unit configured to communicate with an apparatus belonging to a first radio network; and 
     a control unit configured to control whether or not a radio communication apparatus belonging to the first radio network performs frequency hopping based on information of a second radio network different from the first radio network. 
     REFERENCE SIGNS LIST 
     
         
           1  communication system 
           10  radio system 
           100  receiving station 
           110  communication unit 
           120  control unit 
           200  transmitting station 
           210  communication unit 
           220  control unit 
           300  communication control device 
           310  communication unit 
           320  control unit 
           400  DB 
           410  communication unit 
           420  control unit 
           430  storage unit 
           500  sensor apparatus 
           510  communication unit 
           520  control unit 
           530  sensor unit 
           600  core network 
           700  communication network