Abstract:
An information processing system includes a mobile terminal, a plurality of base stations, and an information processing device. The information processing device includes: a first processor that executes a first process including: first generating information to be transmitted to the mobile terminal; and first transmitting the generated information to the plurality of base station. The plurality of base stations include a second processor that executes a second process including receiving the information transmitted from the information processing device, then second generating a radio signal in a shortwave frequency band that corresponds to the information, and second transmitting the generated radio signal to the mobile terminal. The mobile terminal includes a third processor that executes a third process including acquiring the information from the radio signal transmitted from one base station among the plurality of base stations in a case where the radio signal is received.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application is a continuation application of International Application No. PCT/JP2014/059597, filed on Mar. 31, 2014 and designating the U.S., the entire contents of which are incorporated herein by reference. 
     
    
     FIELD 
       [0002]    The embodiments discussed herein are related to an information processing system and an information processing method. 
       BACKGROUND 
       [0003]    Currently, a ship with a gross tonnage greater than or equal to 20 tons is worldwide obligated to install a Global Maritime Distress and Safety System (GMDSS) as a radio communication system therein. However, a GMDSS is expensive, and hence, a fishing vessel with a gross tonnage less than 20 tons is released from installation of the GMDSS by a “deemed GMDSS”, where a report of positional information to a fishing industry radio association that controls a fishing vessel is orally executed three times a day by a fishing industry radio. 
         [0004]    Patent Document 1: Japanese Laid-open Patent Publication No. 05-083180 
         [0005]    Patent Document 2: Japanese Laid-open Patent Publication No. 2006-295397 
         [0006]    Patent Document 3: Japanese Laid-open Patent Publication No. 07-203519 
         [0007]    However, in the deemed GMDSS, a fishing vessel may be unable to respond in operation or no radio wave from a fishing industry radio may reach a fishing vessel depending on a propagation state of the radio wave. Because a fishing industry radio is provided for audio communication such as a Single Side Band (SSB) using, for example, a shortwave band, its reception state may greatly vary depending on a state of an ionospheric layer so as to cause the communication to be difficult and be unable to be in contact for a long period of time. Accordingly, for a fishing vessel that is unable to be in contact, it is impossible to determine whether no radio wave transmitted from a base station reaches the fishing vessel or an unexpected contingency occurs on the fishing vessel. In a case where communication is executed between land and a ship, as well as the deemed GMDSS, a case of being unable to be in contact for a long period of time may be provided similarly, and it is impossible to determine whether no radio wave transmitted from a base station reaches the ship or an unexpected contingency occurs on the ship. 
       SUMMARY 
       [0008]    According to an aspect of the embodiments, an information processing system includes a mobile terminal, a plurality of base stations, and an information processing device. The information processing device includes: a first processor that executes a first process including: first generating information to be transmitted to the mobile terminal; and first transmitting the generated information to the plurality of base station. The plurality of base stations include a second processor that executes a second process including receiving the information transmitted from the information processing device, then second generating a radio signal in a shortwave frequency band that corresponds to the information, and second transmitting the generated radio signal to the mobile terminal. The mobile terminal includes a third processor that executes a third process including acquiring the information from the radio signal transmitted from one base station among the plurality of base stations in a case where the radio signal is received. 
         [0009]    The object and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims. 
         [0010]    It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0011]      FIG. 1  is a block diagram illustrating an example of a configuration of an information processing system according to an embodiment; 
           [0012]      FIG. 2  is an illustration diagram illustrating an example of a sentence transmission format; 
           [0013]      FIG. 3  is an illustration diagram illustrating an example of a management information storage unit; 
           [0014]      FIG. 4  is an illustration diagram illustrating an example of a time table storage unit; 
           [0015]      FIG. 5  is a sequence diagram illustrating an example of an operation of an information processing system according to an embodiment; and 
           [0016]      FIG. 6  is an illustration diagram illustrating an example of a computer that executes an information processing program. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0017]    Preferred embodiments will be explained with reference to accompanying drawings. A disclosed technique is not limited to the present embodiments. The following embodiments may appropriately be combined without an inconsistency. 
         [0018]      FIG. 1  is a block diagram illustrating an example of a configuration of an information processing system according to an embodiment. An information processing system  1  as illustrated in  FIG. 1  includes a mobile terminal  10 , a plurality of base stations  50 , a terminal device  80 , and an information processing device  100 . Although  FIG. 1  illustrates a case where a system includes a single mobile terminal  10 , the number of mobile terminals  10  is not limited and the information processing system  1  may include any number of mobile terminals  10 . 
         [0019]    The mobile terminal  10  and the plurality of base stations  50  are communicably connected to one another by utilizing reflection of a radio wave in a shortwave band from an ionospheric layer L. The plurality of base stations  50 , the terminal device  80 , and the information processing device  100  are communicably connected to one another through a network N. For the network N, any kind of wired or wireless communication network, such as the Internet, a Local Area Network (LAN) or a Virtual Private Network (VPN) can be adopted. 
         [0020]    An outline of the information processing system  1  will be described herein. In the following description, a fishing vessel will be described as an example of a ship. In the information processing system  1 , for example, the mobile terminal  10  is installed in a fishing vessel that operates in a distant sea, for example, a sea area that is 200 nautical miles or greater away from a coast, while the base stations  50  and the terminal device  80  are installed in a fishing industry radio association  70  provided in a neighborhood of a fishing port. In the information processing system  1 , the information processing device  100  is provided on, for example, a cloud such as a data center, and is connected to each of the base stations  50  and the terminal device  80  through the network N. In an example of  FIG. 1 , a base station  50 - 1  is installed in, for example, Hokkaido and a base station  50 - 2  is installed in, for example, Okinawa, while another base station  50  is referred to as a base station  50 - n . For sake of simplicity, a case where a single fishing industry radio association  70  is provided and the base station  50 - 2  and the terminal device  80  are installed in the fishing industry radio association  70  is illustrated in  FIG. 1 , and is not limiting. The base station  50  may solely be installed or may be provided in another fishing industry radio association  70 . Similarly, the terminal device  80  may be installed in another fishing industry radio association  70  as a terminal device  80  of the fishing industry radio association  70 . 
         [0021]    The information processing device  100  extracts a fishing vessel that provides no regular contact for a certain period of time, as a target fishing vessel for priority communication. The information processing device  100  generates request information that corresponds to a target fishing vessel with priority communication being requested. The information processing device  100  transmits request information to the plurality of base stations  50  according to a time table for a fishing industry radio, for example, at a time allotted for a priority communication request. The plurality of base stations  50  transmit request information to a fishing vessel with the mobile terminal  10  installed therein, by a radio for a shortwave band, on one or more conditions among a set of a predetermined time difference and an identical frequency and a set of a different frequency and an identical time, for each base station  50 . 
         [0022]    The mobile terminal  10  installed in a fishing vessel intercepts one of predetermined frequencies by a radio for a shortwave band at a time allotted for a priority communication request on a time table. The mobile terminal  10  receives request information transmitted from the plurality of base stations  50 , and then, transmits management information that includes positional information that indicates a position of its own ship according to a time table to one or more of the plurality of base stations  50  by a radio for a shortwave band. A radio wave transmitted from the mobile terminal  10  reflects from the ionospheric layer L and reaches one or more of the base stations  50  among the base stations  50  that are provided out of a line-of-sight distance. 
         [0023]    The base station  50  with the radio wave reaching it receives a radio wave transmitted from the mobile terminal  10  to acquire management information, and then, transmits the acquired management information to the information processing device  100  through the network N. Herein, a radio wave transmitted from the mobile terminal  10  is received by, for example, the base station  50  in a fishing industry radio association  70  that is different from the fishing industry radio association  70  where a fishing vessel with the mobile terminal  10  installed therein belongs thereto. 
         [0024]    The information processing device  100  receives management information, and then, identifies identification information of the mobile terminal  10  from the management information, that is, identification information of a fishing vessel with the mobile terminal  10  installed therein. The information processing device  100  refers to a management information storage unit  121  as described later, and transmits management information to the terminal device  80  installed in the fishing industry radio association  70  with the fishing vessel belonging thereto. Thereby, the information processing device  100  can transmit request information through the base stations  50  at a plurality of frequencies and times, and hence, can improve reachability of information for a fishing vessel that is unable to be in contact for a long period of time. 
         [0025]    Next, each component that constitutes the information processing system  1  will be described. The mobile terminal  10  includes a communication unit  11 , a storage unit  12 , a positioning unit  13 , a display operation unit  14 , and a control unit  15 . The mobile terminal  10  may also include a variety of functional units that are included in a known computer, as well as functional units as illustrated in  FIG. 1 , for example, a variety of functional units such as an input device or an audio output device. For an example of the mobile terminal  10 , a tablet terminal, a portable personal computer, or the like can be adopted. 
         [0026]    The communication unit  11  is realized by, for example, a radio for a middle-wave to shortwave band or the like. The communication unit  11  is a communication interface that is wirelessly connected to one or more of the plurality of base stations  50  through the ionospheric layer L and executes information communication with the information processing device  100  through the base stations  50  and the network N. The communication unit  11  receives a radio wave transmitted from the base stations  50  and acquires request information or a variety of information. The communication unit  11  transmits management information input from the control unit  15  to the base stations  50 . 
         [0027]    The communication unit  11  can use, for example, one or more frequency bands among a 2 MHz band, a 4 MHz band, a 8 MHz band, a 12 MHz band, and a 16 MHz band, for a radio wave in a middle-wave to short wave band. For example, the communication unit  11  uses a frequency band selected by an operator for the mobile terminal  10 , depending on a distance from land and a time zone. This is because a propagation state of a radio wave in a middle-wave to shortwave band is influenced by an ionospheric layer with a state that is changed depending on solar activity or day or night. For selection of a frequency, a frequency with higher reachability may be selected by calculating a distance to a representative base station  50  based on positional information acquired by positioning in the positioning unit  13  and weighting each frequency depending on the calculated distance, a season, and a time. For selection of a frequency, such selection is executed by taking a band characteristic of each frequency band into consideration. 
         [0028]    The communication unit  11  can use, for example, a digital modulation such as Phase Shift Keying (PSK) or Frequency Shift Keying (FSK) for a modulation method. The communication unit  11  can use, for example, a modulation method such as PSK31 in a low-frequency band. For example, PSK31 provides a low communication speed of 31 baud, but has a narrow occupied band width that is suitable for data communication in a shortwave band for mainly communicating text data. For a method of connection between the communication unit  11  and the control unit  15 , a modulation signal can be input or output by, for example, using serial communication that uses RS-232C for control of the communication unit  11  and using a voice input/output terminal for transfer of data such as management information. 
         [0029]    The storage unit  12  is realized by, for example, a semiconductor memory element such as a Random Access Memory (RAM) or a Flash Memory or a storage device such as a hard disk or an optical disc. The storage unit  12  stores a variety of information that is included in management information, a blank map that is a chart for an operational sea area, received weather information, graphic information that is arranged on the blank map based on the weather information, received market information, a time table that is used for communication with the base stations  50 , information that is used for processing in the control unit  15 , and the like. 
         [0030]    The positioning unit  13  receives a signal from a satellite positioning system. The positioning unit  13  receives a signal from a global navigation satellite system such as the Global Positioning System (GPS), the Global Navigation Satellite System (GLONASS), the Galileo, or the Compass, as a satellite positioning system, to execute positioning. As positioning is requested from the control unit  15 , the positioning unit  13  executes the positioning and outputs a result of the positioning as positional information based on a geodetic system such as the World Geodetic System (WGS)  84 . As continuous positioning is requested from the control unit  15 , the positioning unit  13  executes the positioning continuously and continues to output positional information until a stop thereof is requested from the control unit  15 . The positioning unit  13  may receive a signal from a regional navigation satellite system such as the Quasi-Zenith Satellite System, the Indian Regional Navigation Satellite System, the Doppler Orbitography and Radio-positioning Integrated by Satellite (DORIS), or the BeiDou, as a satellite positioning system. 
         [0031]    The display operation unit  14  is a display device for displaying a variety of information and an input device that receives a variety of operations from a user. For example, the display operation unit  14  is realized by a liquid crystal display or the like as a display device. For example, the display operation unit  14  is realized by a touch panel or the like as an input device. That is, the display operation unit  14  is such that a display device and an input device are integrated therein. For example, the display operation unit  14  displays a keyboard on a lower portion of a screen thereof and receives a key input, as a user interface. The display operation unit  14  outputs an operation input by a user, as operation information, to the control unit  15 . The display operation unit  14  displays a blank map with a variety of information input from the control unit  15  being plotted thereon, positional information, weather information, market information, or the like. 
         [0032]    The control unit  15  is realized by, for example, a program that is stored in an internal storage device and executed by a Central Processing Unit (CPU), a Micro Processing Unit (MPU), or the like while a work area is provided in the RAM. The control unit  15  may be realized by, for example, an integrated circuit such as an Application Specific Integrated Circuit (ASIC) or a Field Programmable Gate Array (FPGA). The control unit  15  controls a whole of the mobile terminal  10 . For example, for the deemed GMDSS, the control unit  15  acquires positional information from the positioning unit  13  and transmits management information that includes the acquired positional information to the base stations  50  through the communication unit  11 , three or more times a day. 
         [0033]    For example, the control unit  15  receives, through the communication unit  11 , one of predetermined frequencies at a time allotted for a priority communication request on a time table. The control unit  15  receives request information transmitted from the plurality of base stations  50 , and then, determines whether or not identification information included in the request information is identification information of its own mobile terminal  10 . In a case where identification information included in request information is identification information of its own mobile terminal  10 , the control unit  15  transmits management information that includes positional information that indicates a position of its own ship to one or more of the plurality of base stations  50  through the communication unit  11 . That is, the control unit  15  transmits a transmission time zone and a transmission frequency that are included in request information and management information that includes positional information that indicates a position of its own ship according to a time table, to one or more of the plurality of base stations  50  through the communication unit  11 . In a case where identification information included in request information is not identification information of its own mobile terminal  10 , the control unit  15  ignores the request information. 
         [0034]    The control unit  15  requests the positioning unit  13  to execute positioning at a time of regular communication for the deemed GMDSS or in a case where request information is received, in order to acquire positional information that is included in management information. The control unit  15  outputs either a request of one-time positioning or a request of continuous positioning, as a request of positioning, to the positioning unit  13 . As positional information corresponding to a request of positioning is input from the positioning unit  13 , the control unit  15  inserts the positional information into a sentence transmission format to produce a sentence for transmission that is management information. The control unit  15  outputs the produced sentence for transmission, that is, management information, to the communication unit  11 . The control unit  15  may encrypt a portion of positional information in such a manner that decryption thereof can be executed by only the terminal device  80  in the fishing industry radio association  70  where a fishing vessel with the mobile terminal  10  installed therein belongs thereto. 
         [0035]      FIG. 2  is an illustration diagram illustrating an example of a sentence transmission format. As illustrated in  FIG. 2 , for example, a sentence transmission format  21  includes items of “Char code”, “format ver”, “Message Type”, “name of a vessel”, “Call Sign”, “nationality”, “prefectures”, “Geographic Point Location”, and “Parity”. In the sentence transmission format  21  in  FIG. 2 , for example, one cell is one byte. A length of the sentence transmission format  21  as illustrated in  FIG. 2  is 104 bytes as an example, is not limited thereto, and can be any length. For an additional item of the sentence transmission format  21 , a code of another radio association for readdressing, a positional information mask level that indicates a level of masking, that is, encrypting, of a portion of positional information, or the like, may be provided. 
         [0036]    “Char code” indicates a character code system. “format ver” indicates a version of the sentence transmission format  21 , and is an item for dealing with a format change. “Message Type” indicates a message type, and represents, for example, a kind of message, such as automatic one, manual one, requested transmission, or emergency. “name of a vessel” represents a vessel name or identification information of a fishing vessel with the mobile terminal  10  installed therein. “name of a vessel” may represent a vessel name and identification information of a fishing vessel if the number of characters is sufficient. “Call Sign” represents a call sign of a radio station for reliable identification thereof. “nationality” is an abbreviation for “nationality registration” and indicates a code of a country with a vessel registered therein. “prefectures” represents a belonging prefecture. “Geographic Point Location” indicates positional information, and represents, for example, a positioning system, latitude, and longitude. “Parity” is parity for confirming complete reception of a message. 
         [0037]    For example, the control unit  15  receives information that includes information to identify a blank map and weather information that corresponds to a position on a blank map, from the base stations  50 , and then, refers to the storage unit  12  to identify a blank map corresponding to weather information. The control unit  15  arranges, and causes the display operation unit  14  to display, graphic information based on weather information on the blank map. The control unit  15  additionally causes the display operation unit  14  to display a variety of information such as market information of a marine product for each port with a signal received therein or a port with landing scheduled based on the market information. 
         [0038]    By referring back to a description for  FIG. 1  the base station  50  includes a communication unit  51  and a control unit  52 . For example, the base station  50  includes a radio for each frequency band and each radio is connected to a non-illustrated antenna so as to be able to simultaneously communicate with the mobile terminals  10  installed in a plurality of fishing vessels in respective frequency bands. 
         [0039]    The communication unit  51  is realized by, for example, a radio in a middle-wave to shortwave band or the like. The communication unit  51  is realized by, for example, a Network Interface Card (NIC) or the like, in order to execute communication with the information processing device  100  through the network N. The communication unit  51  is wirelessly connected to one or more of a plurality of the mobile terminals  10  through the ionospheric layer L, and connected to the information processing device  100  through the network N. That is, the communication unit  51  is a communication interface that executes information communication between the mobile terminal  10  and the base station  50  and between the base station  50  and the information processing device  100 . That is, the base station  50  relays communication between the mobile terminal  10  and the information processing device  100 . The communication unit  51  executes wired or wireless connection to the network N. 
         [0040]    The communication unit  51  receives a radio wave transmitted from the mobile terminals  10  by a plurality of radios, for example, five radios that correspond to a 2 MHz band, a 4 MHz band, a 8 MHz band, a 12 MHz band, and a 16 MHz band, as, for example, radios in a middle-wave to shortwave band. The communication unit  51  receives radio signals that are transmitted from a plurality of the mobile terminals  10  and use radio waves with respectively different frequencies, by a plurality of radios with frequencies corresponding thereto. A frequency band to be used is determined depending on one or more of a position of a fishing vessel with the mobile terminal  10  installed therein and a time zone. For a modulation method, the communication unit  51  uses a modulation method similar to that of the communication unit  11  of the mobile terminal  10 . For connection to the control unit  52 , the communication unit  51  can also use serial communication that uses RS-232C and data communication that uses a voice input/output terminal, similarly to the mobile terminal  10 . 
         [0041]    The communication unit  51  extracts, and outputs to the control unit  52 , management information from the received radio wave. The communication unit  51  transmits the extracted management information to the information processing device  100  through the network N by an NIC. The communication unit  51  transmits request information transmitted from the information processing device  100  through the network N to a fishing vessel with the mobile terminal  10  installed therein, on one or more conditions among a set of a predetermined time difference and an identical frequency and a set of a different frequency and an identical time, according to a time table. Similarly, the communication unit  51  also transmits other information to a fishing vessel with the mobile terminal  10  installed therein, according to a time table. 
         [0042]    The control unit  52  controls a whole of the base station  50 . As management information is input from the communication unit  51 , the control unit  52  causes a non-illustrated display unit to display, for example, the management information having been received. The control unit  52  is, for example, a computer for control of the base station  50  that may be, for example, an embedded computer, a stationary personal computer, or the like. 
         [0043]    The control unit  52  refers to a time table stored in a non-illustrated storage unit and controls the communication unit  51  in such a manner that a variety of information received from the information processing device  100  is transmitted to the mobile terminal  10 . 
         [0044]    The terminal device  80  is, for example, a computer that is installed in the fishing industry radio association  70  and receives, from the information processing device  100 , provision of management information transmitted from the mobile terminal  10  of a fishing vessel that belongs to the fishing industry radio association  70 . For an example of the terminal device  80 , a personal computer can be adopted. For the terminal device  80 , a variety of portable terminal devices as well as a stationary terminal such as the personal computer as described above can also be adopted as the terminal device  80 . The terminal device  80  accumulates and stores management information received from the information processing device  100  through the network N in a non-illustrated storage unit. The terminal device  80  manages, for example, a fishing vessel that belongs to the fishing industry radio association  70 . The terminal device  80  manages, for example, identification information, a captain, date and time of sailing out, a fishing sea area, scheduled date and time of returning, or the like of a fishing vessel, as manage information of the fishing vessel. The terminal device  80  may transmit port information or the like to the mobile terminal  10  of a fishing vessel that belongs to the fishing industry radio association  70 , through the information processing device  100 . 
         [0045]    The information processing device  100  includes a communication unit  110 , a storage unit  120 , and a control unit  130 . The information processing device  100  may include a variety of functional units that are included in a known computer, for example, a variety of functional units such as an input device or an audio output device, other than functional units as illustrated in  FIG. 1 . The information processing device  100  may be configured to be provided on a so-called cloud and to be capable of extending or changing such a configuration freely. 
         [0046]    The communication unit  110  is realized by, for example, an NIC or the like. The communication unit  110  is a communication interface that provides wired or wireless connection to the base stations  50  through the network N and executes information communication with the base stations  50 . The communication unit  110  receives management information from the base stations  50 . The communication unit  110  outputs the received management information to the control unit  130 . Management information with identification information of the mobile terminal  10  being identified is input from the control unit  130  to the communication unit  110 . The communication unit  110  transmits the input identified management information to a management organization corresponding to the management information, that is, the terminal device  80  of the fishing industry radio association  70  where a fishing vessel with the mobile terminal  10  that has transmitted the management information being installed therein belongs thereto. 
         [0047]    As request information is input from the control unit  130 , the communication unit  110  transmits the request information to the base stations  50  through the network N. As information that is input from the control unit  130  and includes weather information or the like is input therefrom, the communication unit  110  transmits the information to the base stations  50  through the network N. 
         [0048]    The storage unit  120  is realized by, for example, a semiconductor memory element such as a RAM or a flash memory or a storage device such as a hard disk or an optical disc. The storage unit  120  includes a management information storage unit  121 , a provided information storage unit  122 , and a time table storage unit  123 . The storage unit  120  stores information that is used for processing in the control unit  130 . 
         [0049]    The management information storage unit  121  stores identification information of a fishing vessel, a belonging management organization, a belonging fishing port, and contact information associatively with one another.  FIG. 3  is an illustration diagram illustrating an example of a management information storage unit. As illustrated in  FIG. 3 , the management information storage unit  121  includes items of “IDENTIFICATION INFORMATION”, “BELONGING MANAGEMENT ORGANIZATION”, “BELONGING FISHING PORT”, “CONTACT INFORMATION  1 ”, “CONTACT INFORMATION  2 ”, and “MANAGEMENT INFORMATION RECEPTION DATE AND TIME”. 
         [0050]    For example, “IDENTIFICATION INFORMATION” is a fishing vessel registration number and identifies a fishing vessel. “BELONGING MANAGEMENT ORGANIZATION” indicates a management organization with a fishing vessel belonging thereto, for example, a fishing industry radio association or the like. “BELONGING FISHING PORT” indicates a fishing port with a fishing vessel belonging thereto. A fishing port with a fishing vessel belonging thereto corresponds to, for example, a fishery cooperative association with the fishing vessel belonging thereto. “CONTACT INFORMATION  1 ” or “CONTACT INFORMATION  2 ” indicates, for example, a contact telephone number, a contact mail address, or the like, for a family of a captain of a fishing vessel. “MANAGEMENT INFORMATION RECEPTION DATE AND TIME” indicate date and time when management information is received from the mobile terminal  10  of a fishing vessel that is identified by identification information. As new management information is received, “MANAGEMENT INFORMATION RECEPTION DATE AND TIME” is updated so as to be date and time of such reception. That is, “MANAGEMENT INFORMATION RECEPTION DATE AND TIME” indicate date and time when last management information is received from the mobile terminal  10  of the fishing vessel. 
         [0051]    The provided information storage unit  122  stores port information received from the terminal device  80  in the fishing industry radio association  70  or the like. The provided information storage unit  122  stores information to identify a blank map that is a chart for an operational sea area, weather information acquired from a non-illustrated external server through the network N, market information acquired from a terminal device in a non-illustrated fishery cooperative association or the like through the network N, and the like. The provided information storage unit  122  may additionally store a variety of information that is provided to the mobile terminal  10 . 
         [0052]    The time table storage unit  123  stores, for example, a time table that determines what information content is transmitted by what frequency band at what minutes every hour, for information that is transmitted from each base station  50 .  FIG. 4  is an illustration diagram illustrating an example of a time table storage unit. As illustrated in  FIG. 4 , the time table storage unit  123  includes items of “* MINUTE(S) EVERY HOUR”, “BASE STATION  50 - 1 ”, “BASE STATION  50 - 2 ”, “FREQUENCY”, and “CONTENT”. 
         [0053]    “* MINUTE(S) EVERY HOUR” indicate(s) a time in an hour on a minute-by-minute basis. Each of “BASE STATION  50 - 1 ” and “BASE STATION  50 - 2 ” indicates the base station  50  corresponding thereto. “FREQUENCY” indicates a frequency for transmission from the base station at a time. “CONTENT” indicates a content of communication at the time. For example, from 0 minutes to 2 minutes and 59 seconds every hour on a time table, the base station  50 - 1  transmits a priority communication request at frequencies of 2 MHz and 4 MHz. The base station  50 - 2  transmits a priority communication request at frequencies of 8 MHz and 12 MHz. From 3 minutes to 6 minutes and 59 seconds every hour on a time table, the base station  50 - 1  transmits information for a first area at frequencies of 2 MHz and 4 MHz. The base station  50 - 2  transmits information for a first area at frequencies of 8 MHz and 12 MHz. 
         [0054]    For example, from 17 minutes to 19 minutes and 59 seconds every hour on a time table, the base station  50 - 1  receives a priority communication response at frequencies of 2 MHz and 4 MHz. The base station  50 - 2  receives a priority communication response at frequencies of 8 MHz and 12 MHz. In an example of  FIG. 4 , a time table causes each base station  50  to change a part of frequencies and transmit information with an identical content to the mobile terminal  10  every 20 minutes or receive management information from the mobile terminal  10  that corresponds to a priority communication request. For example, the base station  50 - 1  transmits and receives an identical content at a frequency of 4 MHz from 0 minutes to 19 minutes and 59 seconds every hour and from 20 minutes to 39 minutes and 59 seconds every hour. 
         [0055]    By referring back to a description for  FIG. 1  the control unit  130  is realized by, for example, a program that is stored in an internal storage device and executed by a CPU, a MPU, or the like while a work area is provided in a RAM. The control unit  130  may be realized by, for example, an integrated circuit such as an ASIC or a FPGA. The control unit  130  includes a reception control unit  131 , an identification unit  132 , a request unit  133 , an information provision unit  134 , and a transmission control unit  135 , and realizes or executes an information-processing function or action as described below. An internal configuration of the control unit  130  is not limited to the configuration as illustrated in  FIG. 1  and may be another configuration as long as such a configuration executes information processing as described later. 
         [0056]    The reception control unit  131  receives management information from the plurality of base stations  50  through the communication unit  110  and the network N. The reception control unit  131  receives, as management information, for example, management information transmitted from a mobile terminal  10  at an interval of a predetermined period of time or greater. Herein, a predetermined period of time can be, for example, 3 hours. For example, in a case where the mobile terminal  10  transmits management information at an interval of 6 hours, the reception control unit  131  does not strictly provide the interval of 6 hours but permits a slight amount of tolerance of a period of time. The reception control unit  131  may receive, or may receive none of or neglect, management information transmitted from the mobile terminal  10  at an interval less than a predetermined period of time. The reception control unit  131  receives, from the plurality of base stations  50 , management information transmitted from an identical mobile terminal  10 , depending on a propagation state of a radio wave. The reception control unit  131  outputs the received management information to the identification unit  132 . 
         [0057]    As the management information is input from the reception control unit  131 , the identification unit  132  identifies identification information of the mobile terminal  10  from the received management information based on the sentence transmission format  21 . For identification information, a fishing vessel registration number for identifying a fishing vessel may be used or a call sign that is allotted for a radio station for the mobile terminal  10  may be used. The identification unit  132  transmits the received management information and the identified identification information to the transmission control unit  135  associatively with one another. 
         [0058]    The request unit  133  refers to the management information storage unit  121  and extracts identification information with management information reception date and time that are provided in a predetermined period of time or greater before current date and time. The request unit  133  extracts a fishing vessel with the mobile terminal  10  that corresponds to the extracted identification information being installed therein, as a target fishing vessel for priority communication. That is, the request unit  133  extracts a fishing vessel that is unable to be in contact for a long period of time. The request unit  133  generates request information that includes identification information of the mobile terminal  10  installed in a target fishing vessel and a transmission time zone and a transmission frequency to transmit management information and is to request the mobile terminal  10  being a target to transmit the management information. The request unit  133  outputs the generated request information to the transmission control unit  135 . 
         [0059]    The information provision unit  134  refers to the provided information storage unit  122  and generates information that includes information to identify a blank map and weather information that corresponds to a position on the blank map. The information provision unit  134  refers to the provided information storage unit  122  and generates market information of a marine product for each port or the like. The information provision unit  134  outputs each piece of the generated information to the transmission control unit  135 . That is, the request unit  133  and the information provision unit  134  are a generation unit that generates information to be transmitted to the mobile terminal  10 . 
         [0060]    As management information and identification information associated therewith are input from the identification unit  132 , the transmission control unit  135  refers to the management information storage unit  121  and identifies a management organization with the mobile terminal  10  belonging thereto, based on the identification information. That is, the transmission control unit  135  identifies the fishing industry radio association  70  where a fishing vessel with the mobile terminal  10  installed therein belongs thereto, based on identification information. The transmission control unit  135  transmits management information to the terminal device  80  in the identified fishing industry radio association  70  through the communication unit  110  and the network N. 
         [0061]    In a case where identification information of management information input from the identification unit  132  is identical to identification information of management information having already been transmitted to the terminal device  80  in the fishing industry radio association  70  within a predetermined period of time, the transmission control unit  135  discards the input management information and identification information. That is, the transmission control unit  135  executes no transmission to the terminal device  80  in the fishing industry radio association  70  while the input management information and identification information are a second or subsequent piece of management information received by the plurality of base stations  50 . 
         [0062]    In a case where a portion of positional information that is included in management information is encrypted, the transmission control unit  135  transmits the management information to the terminal device  80  in the identified fishing industry radio association  70  thorough the communication unit  110  and the network N in such a manner that the positional information is not decoded and the portion remains encrypted. 
         [0063]    The transmission control unit  135  transmits reception information to indicate that management information transmitted from the mobile terminal  10  is received, to a non-illustrated terminal device of a person involved in a fishing vessel with the mobile terminal  10  installed therein, through the communication unit  110  and the network N. For example, the transmission control unit  135  refers to the management information storage unit  121 , acquires a mail address of the person involved, and transmits reception information in an electronic mail. Reception information may merely be such that management information has been received, or for example, other information such as positional information may be added thereto. 
         [0064]    In a case where information to identify emergency information is included in management information, the transmission control unit  135  immediately transmits the management information to a non-illustrated organization that corresponds to the emergency information, for example, the Japan Coast Guard or the like. Thereby, the information processing device  100  can immediately transmit emergent information to an organization capable of dealing therewith. 
         [0065]    As request information is input from the request unit  133 , the transmission control unit  135  refers to the time table storage unit  123 , and transmits the request information to the plurality of base stations  50  through the network N so as to execute its transmission to the mobile terminal  10  in a corresponding transmission time zone and at a corresponding transmission frequency. As each piece of information is input from the information provision unit  134 , the transmission control unit  135  refers to the time table storage unit  123 , and transmits each piece of the information to the plurality of base stations  50  through the network N so as to execute its transmission to the mobile terminal  10  in a corresponding transmission time zone and at a corresponding transmission frequency. 
         [0066]    Next, an operation of the information processing system  1  according to the embodiment will be described. In the following description, a case where no contact for the deemed GMDSS is provided from a fishing vessel that has gone fishing in a distant sea, for a long period of time, and management information of the fishing vessel is transmitted by priority communication will be described as an example of an operation of the information processing system  1 . In the flowing description, a case will be described where the mobile terminal  10  belongs to the fishing industry radio association  70  that includes the base station  50 - 2  and the mobile terminal  10  receives a radio wave transmitted from the base station  50 - 1 . A case will be described where a radio wave transmitted from the mobile terminal  10  is not able to be received by the base station  50 - 2  but is able to be received by the other base station  50 - 1 . That is, in the following description, a case will be described where communication in a shortwave band is possible between the mobile terminal  10  and the base station  50 - 1 . 
         [0067]      FIG. 5  is a sequence diagram illustrating an example of an operation of an information processing system according to the embodiment. The request unit  133  in the information processing device  100  refers to the management information storage unit  121  and extracts identification information with management information reception date and time that are provided in a predetermined period of time or greater before current date and time. The request unit  133  extracts a fishing vessel with the mobile terminal  10  that corresponds to the extracted identification information being installed therein, as a target fishing vessel for priority communication (step S 1 ). 
         [0068]    The request unit  133  generates request information that includes identification information of the mobile terminal  10  installed in a target fishing vessel and a transmission time zone and a transmission frequency to transmit management information and is to request a target mobile terminal  10  to transmit the management information (step S 2 ). The request unit  133  outputs the generated request information to the transmission control unit  135 . 
         [0069]    As request information is input from the request unit  133 , the transmission control unit  135  refers to the time table storage unit  123  and transmits the request information to the plurality of base stations  50  through the network N so as to execute its transmission to the mobile terminal  10  in a corresponding transmission time zone and at a corresponding transmission frequency. That is, the transmission control unit  135  transmits request information to the plurality of base stations  50  through the network N according to a time table (step S 3 ). 
         [0070]    The communication unit  51  in the base station  50 - 1  receives request information from the information processing device  100  through the network N (step S 4 ). The communication unit  51  transmits request information to a fishing vessel with the mobile terminal  10  installed therein, according to a time table (step S 5 ). That is, the communication unit  51  transmits request information to a fishing vessel with the mobile terminal  10  installed therein, at a time allotted for a priority communication request on a time table. Herein, a time table identical to that of the information processing device  100  is preliminarily stored in a non-illustrated storage unit in each base station  50  and the communication unit  51  refers to the time table so that a transmission time zone and a transmission frequency in request information can be determined. The base station  50  may receive a transmission time zone and a transmission frequency in request information together with the request information from the information processing device  100  and transmit the request information to the mobile terminal  10  depending on the received transmission time zone and transmission frequency. 
         [0071]    The control unit  15  in the mobile terminal  10  installed in a fishing vessel receives a radio wave with one of predetermined frequencies through the communication unit  11  at a time allotted for a priority communication request on a time table. Herein, for a time table of the mobile terminal  10 , a time table identical to that of the information processing device  100  is preliminarily stored in the storage unit  12  before sailing out. The control unit  15  refers to the time table, determines a reception time zone and a reception frequency, and receives request information (step S 6 ). 
         [0072]    The control unit  15  receives request information transmitted from the plurality of base stations  50 , and then, determines whether or not identification information included in the request information is identification information of its own mobile terminal  10 . In a case where identification information included in request information is identification information of its own mobile terminal  10 , the control unit  15  generates management information. First, the control unit  15  requests the positioning unit  13  to execute positioning. As positional information corresponding to a request of positioning is input from the positioning unit  13 , the control unit  15  insets the positional information into a sentence transmission format to generate management information. 
         [0073]    The control unit  15  extracts a transmission time zone and a transmission frequency that are included in the request information. The control unit  15  transmits management information that includes the extracted transmission time zone and transmission frequency and positional information to indicate a position of its own ship according to a time table to one or more of the plurality of base stations  50  through the communication unit  11  (step S 7 ). 
         [0074]    The communication unit  51  in the base station  50 - 1  receives a radio wave transmitted from the mobile terminal  10 . That is, the communication unit  51  receives management information that is included in the received radio wave (step S 8 ). The communication unit  51  transmits the received management information to the information processing device  100  through the network N (step S 9 ). 
         [0075]    The reception control unit  131  in the information processing device  100  receives management information from the base station  50 - 1  through the communication unit  110  and the network N (step S 10 ). The reception control unit  131  outputs the received management information to the identification unit  132 . As the management information is input from the reception control unit  131 , the identification unit  132  identifies identification information of the mobile terminal  10  from the received management information based on the sentence transmission format  21  (step S 11 ). The identification unit  132  outputs the received management information and the identified identification information to the transmission control unit  135  associatively with one another. 
         [0076]    As management information and identification information associated therewith are input from the identification unit  132 , the transmission control unit  135  refers to the management information storage unit  121  and identifies the fishing industry radio association  70  where a fishing vessel with the mobile terminal  10  installed therein belongs thereto, based on the identification information (step S 12 ). The transmission control unit  135  transmits management information to the terminal device  80  of the identified fishing industry radio association  70  through the communication unit  110  and the network N (step S 13 ). 
         [0077]    The terminal device  80  receives management information from the information processing device  100  through the network N (step S 14 ). The terminal device  80  accumulates and stores the received management information in a storage unit (step S 15 ). For example, the terminal device  80  plots, and displays on a non-illustrated display unit, positional information of a belonging fishing vessel on a map, so as to provide the positional information to a user for the terminal device  80 . Thereby, even in a case where a fishing vessel with the mobile terminal  10  installed therein is unable to be in contact for a long period of time, management information is requested to be transmitted at multiple frequencies and in multiple time zones, and hence, reachability of such a request for the mobile terminal  10  can be improved. 
         [0078]    Next, an example of an operation of the information processing device  100  will be described in a case where weather information, market information, and the like are transmitted to the mobile terminal  10  to execute information provision thereto. A basic operation is similar to the transmission of request information as described above, and hence, its description with a sequence diagram will be omitted. 
         [0079]    The information provision unit  134  in the information processing device  100  refers to the provided information storage unit  122  and generates information that includes information to identify a blank map and weather information that corresponds to a position on the blank map. The information provision unit  134  refers to the provided information storage unit  122  and generates market information of a marine product for each port or the like. The information provision unit  134  outputs each piece of the generated information to the transmission control unit  135 . 
         [0080]    As each piece of information is input from the information provision unit  134 , the transmission control unit  135  refers to the time table storage unit  123  and transmits each piece of the information to the plurality of base stations  50  through the network N so as to execute its transmission to the mobile terminal  10  in a corresponding transmission time zone and at a corresponding transmission frequency. 
         [0081]    The communication unit  51  in the base station  50 - 1  receives each piece of information from the information processing device  100  through the network N. The communication unit  51  transmits each piece of information to a fishing vessel with the mobile terminal  10  installed therein, according to a time table. That is, for example, for a fishing vessel that is present in a second area, the communication unit  51  transmits each piece of information to a fishing vessel with the mobile terminal  10  installed therein in the second area at a time allotted for information for the second area on a time table. 
         [0082]    The control unit  15  in the mobile terminal  10  installed in a fishing vessel receives a radio wave at one of predetermined frequencies through the communication unit  11  at a time allotted for information for a second area on a time table to receive each piece of information. The control unit  15  causes the display operation unit  14  to display each piece of the received information. For information that is displayed on the display operation unit  14 , for example, a blank map of the area with weather information plotted thereon or a port with landing scheduled based on market information is displayed. Thereby, weather information or market information in each sea area can be provided to a fishing vessel in a distant sea. 
         [0083]    Thus, the information processing system  1  includes the mobile terminal  10 , the plurality of base stations  50 , and the information processing device  100 . The information processing device  100  includes a generation unit that generates information to be transmitted to the mobile terminal  10 , and a transmission unit that transmits the generated information to the plurality of base stations  50 . The plurality of base stations  50  include communication units that receive information transmitted from the information processing device  100 , then generate a radio signal in a shortwave frequency band that corresponds to the information, and transmit the generated radio signal to the mobile terminal  10 . The mobile terminal  10  includes a control unit that acquires the information from the radio signal transmitted from one base station  50  among the plurality of base stations  50  in a case where the radio signal is received thereby. As a result, reachability of information for a ship can be improved. 
         [0084]    Each base station  50  in the plurality of base stations  50  in the information processing system  1  transmits the information to the mobile terminal  10  on one or more conditions among a set of a predetermined time difference and a common frequency and a set of a different frequency and a common time. As a result, reachability of information for a ship can further be improved. 
         [0085]    Each base station  50  in the plurality of base stations  50  in the information processing system  1  is set to be capable of transmitting a radio signal with a common shortwave frequency. As a result, a dead band caused by a skip phenomenon can be reduced. 
         [0086]    Each base station  50  in the plurality of base stations  50  in the information processing system  1  includes a plurality of transmitters, and each of the plurality of transmitters is set so as to transmit, in a case where a plurality of common frequencies are set, a radio signal with one frequency among the set plurality of the common shortwave frequencies. As a result, reachability of information for a ship can further be improved. 
         [0087]    The mobile terminal  10  in the information processing system  1  is installed in a ship. As a result, information can be provided to a chip. 
         [0088]    The information processing device  100  in the information processing system  1  generates, as the information, information including request information that includes identification information of the mobile terminal  10  and a transmission time zone and a transmission frequency to transmit management information that includes the identification information and positional information of the mobile terminal  10 , and is to request the mobile terminal  10  to transmit the management information. The information processing device  100  further receives the management information transmitted from one or more of the plurality of base stations  50  that have received the management information transmitted in the transmission time zone being included in the request information and at the transmission frequency being included in the request information from a mobile terminal  10  that has received the request information and includes identification information corresponding to the identification information being included in the request information. As a result, a fishing vessel that is unable to be in contact for a long period of time can be requested to transmit management information and the management information can be received from the fishing vessel. 
         [0089]    The information in the information processing system  1  includes information to identify a blank map and weather information that corresponds to a position on the blank map, and the mobile terminal  10  executes control to refer to a storage unit that stores the blank map, identify a blank map based on the information to identify a blank map, and arrange and display graphic information based on the weather information on the identified blank map. As a result, weather information in a sea area with a fishing vessel being present therein can be provided to the fishing vessel. 
         [0090]    The information in the information processing system  1  includes market information of a marine product for each port. As a result, what port a fishing vessel lands a caught marine product in can readily be known. 
         [0091]    The information processing system  1  includes the plurality of base stations  50  set to be capable of transmitting a radio signal with an identical shortwave frequency by a first network. The information processing system  1  includes the information processing device  100  that transmits information being transmitted from at least one base station  50  among the plurality of base stations  50  by the first network, to the plurality of base stations  50 , by a second network different from the first network. As a result, information can be transmitted from one or more of the base stations  50 . 
         [0092]    Reception information is transmitted from the information processing device  100  to a person involved in a fishing vessel with the mobile terminal  10  installed therein in the embodiment as described above that is not limited thereto. For example, a Web server function may be added to the information processing device  100  so that a map with positional information of each fishing vessel being plotted thereon is displayed on a Web page on the Internet and a person involved in a fishing vessel logs in the Web page to view the Web page. Thereby, a person involved in a fishing vessel views a position of a fishing vessel plotted on a map, and hence, more readily recognize the position of the fishing vessel. Reception information may be transmitted to a person involved in a fishing vessel through a telephone, FAX, or the like. 
         [0093]    An antenna that is connected to the communication unit  51  in the base station  50  is connected to each radio in the embodiment as described above that is not limited thereto. For example, a multiband-type antenna may be used or an antenna tuner may be used. Different frequencies may be used between transmission from a ship to land and transmission from land to a ship. Thereby, a condition on an installation site of an antenna is relaxed. 
         [0094]    PSK31 is provided as an example of digital modulation in the embodiment as described above that is not limited thereto. For example, a narrowband digital modulation usable in a shortwave band, such as Radioteletype (RTTY), packet communication, or SSTV, may be used. Thereby, communication with a larger amount of data can be executed in a high frequency band in a shortwave band. 
         [0095]    An identical content is transmitted at an identical time on a time table in the embodiment as described above that is limited thereto. For example, an order of information to be transmitted may be changed, and a frequency may be dedicated for transmission from the base station  50  while another frequency may be dedicated for transmission from the mobile terminal  10 . Thereby, for example, a response to a priority communication request can be received at any time. 
         [0096]    Request information is transmitted at timing of transmitting of request information from the information processing device  100  in a case where no regular communication is provided for a long period of time, for example, 48 hours or the like in the embodiment as described above that is not limited thereto. For example, request information may be transmitted in a case where a family of a crew of a fishing vessel desires to be in contact. In such a case, request information may include a content of contact or the like and management information that is transmitted from the mobile terminal  10  of a fishing vessel may include a response to the contact. 
         [0097]    Each component of each illustrated unit is not necessarily requested to be physically configured as illustrated in the figures. That is, a specific configuration of dispersion or integration of respective units is not limited to those illustrated in the figures, and can be configured by functionally or physically dispersing or integrating all or a part thereof in an arbitrary unit depending on a variety of loads, usage, or the like. For example, a case where the terminal device  80  is installed in the fishing industry radio association  70  together with the base station  50  is illustrated in the embodiment as described above, and the terminal device  80  may be installed at a location different from that of the base station  50  as long as it is communicable with the information processing device  100 . 
         [0098]    For a variety of processing functions to be executed in each device, all or any part thereof may be executed on a computer such as a CPU (or an MPU or a Micro Controller Unit (MCU)). For a variety of processing functions, it goes without saying that all or any part thereof may be executed on a program that is analyzed and executed in a CPU (micro-computer such as an MPU or an MCU) or on hardware based on wired logic. 
         [0099]    A variety of processes described in the embodiment as described above can be realized by executing a preliminarily prepared program on a computer. Hereinafter, an example of a computer that executes a program that has a function similar to that of the embodiment as described above will be described.  FIG. 6  is an illustration diagram illustrating an example of a computer that executes an information processing program. 
         [0100]    As illustrate in  FIG. 6 , a computer  200  includes a CPU  201  that executes a variety of operation processes, an input device  202  that receives a data input, and a monitor  203 . The computer  200  includes a medium reading device  204  that reads a program or the like from a storage medium, an interface device  205  to connect with a variety of devices, and a communication device  206  to provide wired or wireless connection with another information processing device or the like. The computer  200  includes a RAM  207  that temporarily stores a variety of information, and a hard disk device  208 . Each of the devices  201  to  208  is connected to a bus  209 . 
         [0101]    In the hard disk device  208 , an information processing program is stored that includes functions similar to those of respective processing units as illustrated in  FIG. 1  that are the reception control unit  131 , the identification unit  132 , the request unit  133 , the information provision unit  134 , and the transmission control unit  135 . In the hard disk device  208 , a variety of data are stored to realize the management information storage unit  121 , the provided information storage unit  122 , the time table storage unit  123 , and an information processing program. The input device  202  receives, for example, an input of a variety of information such as operation information, from an administrator for the computer  200 . The monitor  203  displays, for example, a variety of screens to an administrator for the computer  200 . For example, a printing device or the like is connected to the interface device  205 . For example, the communication device  206  includes a function similar to that of the communication unit  110  as illustrated in  FIG. 1 , is connected to the network N, and communicates a variety of information such as management information with the base station  50 . 
         [0102]    The CPU  201  reads out, develops on the RAM  207 , and executes, each program stored in the hard disk device  208 , to execute a variety of processes. These programs can cause the computer  200  to function as the reception control unit  131 , the identification unit  132 , the request unit  133 , the information provision unit  134 , and the transmission control unit  135  as illustrated in  FIG. 1 . 
         [0103]    The information processing program as described above is not necessarily requested to be stored in the hard disk device  208 . For example, a program stored in a storage medium readable by the computer  200  may be read out and executed by the computer  200 . A storage medium readable by the computer  200  corresponds to, for example, a CD-ROM, a DVD disc, a portable recording medium such as a Universal Serial Bus (USB) memory, a semiconductor memory such as a flash memory, a hard disk drive, or the like. Such an information processing program may be stored in a device connected to a public line, the Internet, a LAN, or the like, and the computer  200  may read out therefrom, and execute, the information processing program. 
         [0104]    Reachability of information for a ship can be improved. 
         [0105]    All examples and conditional language recited herein are intended for pedagogical purposes of aiding the reader in understanding the invention and the concepts contributed by the inventor to further the art, and are not to be construed as limitations to such specifically recited examples and conditions, nor does the organization of such examples in the specification relate to a showing of the superiority and inferiority of the invention. Although the embodiments of the present invention have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.