Source: https://patents.google.com/patent/CN101951610B/en
Timestamp: 2020-02-16 20:51:25
Document Index: 393523180

Matched Legal Cases: ['art 103', 'art 103', 'art 104', 'art 107', 'art 201', 'art 202', 'art 201', 'art 103', 'art 104', 'art 104', 'art 103', 'art 103', 'art 104', 'art 104', 'art 202', 'art 201', 'art 202', 'art 202', 'art 202', 'art 202', 'art 103', 'art 201', 'art 202', 'art 202', 'art 202', 'art 104', 'art 202', 'art 202', 'art 202', 'art 202', 'art 202', 'art 106', 'art 106', 'art 106', 'art 106', 'art 208', 'art 208', 'art 208', 'art 106', 'art 201', 'art 103', 'art 106', 'art 106', 'art 201', 'art 106', 'art 106', 'art 107', 'art 107', 'art 107', 'art 107', 'art 108', 'art 109', 'art 108', 'art 108', 'art 109', 'art 108', 'art 109', 'art 108', 'art 201', 'art 103', 'art 109', 'art 103', 'art 104', 'art 201', 'art 202', 'art 202', 'art 202', 'art 202', 'art 202', 'art 106', 'art 106', 'art 106', 'art 208', 'art 103', 'art 104']

CN101951610B - Radio station, transmitting station, and frequency band sharing method - Google Patents
CN101951610B
CN101951610B CN 201010226846 CN201010226846A CN101951610B CN 101951610 B CN101951610 B CN 101951610B CN 201010226846 CN201010226846 CN 201010226846 CN 201010226846 A CN201010226846 A CN 201010226846A CN 101951610 B CN101951610 B CN 101951610B
CN 201010226846
CN101951610A (en
2009-07-10 Priority to JP2009164244A priority Critical patent/JP4907700B2/en
2009-07-10 Priority to JP2009-164244 priority
The invention has a frequency band sharing method where a transmitting station in a second radio communication system determines whether transmission of a second radio communication system signal using a shared frequency band is possible or not based on load information of a first radio communication system broadcast from a base station in the first radio communication system, a step where the transmitting station in the second radio communication system calculates predicted interference power caused in a receiving station in the first radio communication system by the second radio communication system signal transmitted using the shared frequency band, and a step where the base station in the first radio communication system increases an allowable interference level of a first radio communication system signal transmitted using the shared frequency band based on the predicted interference power broadcast from the transmitting station in the second radio communication system.
Radio station, dispatching station and frequency band sharing method
The application is willing to 2009-164244 as the basis and advocates its priority take the Japanese patent application laid that proposes on July 10th, 2009, and having comprised by reference the full content of this formerly patent application.
The present invention relates to use dispatching station, and the frequency band sharing method of radio station, the 2nd wireless communication system of the 1st wireless communication system of sharing frequency band, for the use of this shared frequency band, the 1st wireless communication system has precedence over the 2nd wireless communication system.
In the past, about in the technology that comprises shared frequencies between a plurality of wireless communication systems of priority system and non-priority system, having or not of the signal of the priority system in the shared frequency band of known non-priority system basis, use the technology (for example, TOHKEMY 2006-222665 communique) of sharing the frequency band transmitted signal.
Specifically, non-priority system was sending before the signal of native system, and judgement has or not from the signal of sharing the priority system in frequency band.For the interference that prevents from by the transmitted signal from non-priority system, priority system being caused, non-priority system only not from the signal of priority system the time, uses and shares the frequency band transmitted signal.
But more than needed even the load of priority system has in above-mentioned prior art, in the situation that signal from priority system is arranged, non-priority system does not also carry out the transmission of signal.Therefore, although it is more than needed to exist the load of priority system to have, from the confined problem of send opportunity of the signal of non-priority system.
And, in above-mentioned prior art, in order to increase the send opportunity from non-priority system, even supposed that also non-priority system also carries out the situation of the transmission of signal when the signal that has from priority system.But in this case, if the receiver of priority system is positioned near the transmitter of non-priority system, the interference level in the receiver of priority system can be owing to sharply increasing from the transmitted signal of non-priority system.Therefore, there is the problem of the signal quality variation of priority system.
The present invention proposes in light of this situation, its purpose is, provide when in the situation that comprise shared frequencies between a plurality of wireless communication systems of priority system and non-priority system, increase the send opportunity of the signal in non-priority system, prevent simultaneously radio station, dispatching station and the frequency band sharing method of the signal quality variation in priority system.
radio station of the present invention is controlled the 1st wireless telecommunication system signal (upward signal UL1 or downstream signal DL1) that sends with sharing frequency band, for described shared frequency band, the 1st wireless communication system is than the described shared frequency band of the preferential use of the 2nd wireless communication system, described radio station is characterised in that, have: notification unit (notification signal receiving and transmitting part 103), its load information with described the 1st wireless communication system is notified the dispatching station to described the 2nd wireless communication system, acquisition unit (notification signal receiving and transmitting part 103), it obtains the expected interference power that uses the 2nd wireless telecommunication system signal that described shared frequency band sends that the receiving station of described the 1st wireless communication system is caused from the described dispatching station of described the 2nd wireless communication system, with interference margin control part (interference margin control part 104), it is according to the described expected interference power that is obtained by described acquisition unit, improve the interference margin of described the 1st wireless telecommunication system signal that uses described shared frequency band transmission, described radio station also has the frequency band switching part, the frequency band of its described the 1st wireless telecommunication system signal switches to the band occupancy of described the 1st wireless communication system from described shared frequency band, described acquisition unit is together with described expected interference power, also obtain the priority level information of described the 1st wireless telecommunication system signal and described the 2nd wireless telecommunication system signal, reception quality information with described the 1st wireless telecommunication system signal, described frequency band switching part is according at least a information in described priority level information and described reception quality information, the frequency band of described the 1st wireless telecommunication system signal is switched to described band occupancy from described shared frequency band.
According to this structure, notify dispatching station to the 2nd wireless communication system by notification unit with the load information of the 1st wireless communication system, can increase thus the send opportunity of the 2nd wireless telecommunication system signal that sends from the dispatching station of the 2nd wireless communication system.And, according to the expected interference power that is obtained by acquisition unit, improve the interference margin of the 1st wireless telecommunication system signal, the quality that can prevent thus the 1st wireless telecommunication system signal that receives in the receiving station of the 1st wireless communication system is shared the 2nd wireless telecommunication system signal that frequency band sends and variation owing to using.
and, the invention is characterized in, described interference margin control part improves the transmitted power of described the 1st wireless telecommunication system signal or reduces the transmission rate of the 1st wireless telecommunication system signal, so that even the receiving station of described the 1st wireless communication system has been subject to causing by described the 2nd wireless telecommunication system signal the described expected interference power of obtaining according to by described acquisition unit, the signal quality of also keeping described the 1st wireless telecommunication system signal improves the transmitted power of described the 1st wireless telecommunication system signal or reduces the transmission rate of the 1st wireless telecommunication system signal.。
And, the invention is characterized in, in described radio station, described acquisition unit is together with described expected interference power, described priority level information and described reception quality information, also obtain the load information of described the 2nd wireless communication system, described frequency band switching part switches to described band occupancy to the frequency band of described the 1st wireless telecommunication system signal from described shared frequency band according at least a information in the load information of described priority level information, described reception quality information and described the 2nd wireless communication system.
And, the invention is characterized in, in described radio station, also have peripheral cell and disturb control part (peripheral cell disturbs control part 107), it is according to the described expected interference power that is obtained by described acquisition unit, reduces the interference power that the described receiving station of described the 1st wireless communication system is caused from peripheral cell.
dispatching station of the present invention (base station BS 2 or mobile radio station MT2), use and share frequency band to receiving station's transmission the 2nd wireless telecommunication system signal (downstream signal DL2 or upward signal UL2) of the 2nd wireless communication system, for described shared frequency band, the 1st wireless communication system is than the described shared frequency band of the preferential use of described the 2nd wireless communication system, described dispatching station is characterised in that, have: acquisition unit (notification signal receiving and transmitting part 201), it obtains the load information of described the 1st wireless communication system, could send judging part (could send judging part 202), it is according to the described load information that is obtained by described acquisition unit, the interference power level that infer to allow described the 1st wireless telecommunication system signal to accept is that the difference of the suffered interference power level of tolerance limit interference level and described the 1st wireless telecommunication system signal is that interference margin is more than needed, more than needed according to the described interference margin of inferring whether predetermined value with on judge described the 2nd wireless telecommunication system signal that could send the described shared frequency band of use, expected interference power calculation section (expected interference power calculation section 204), it calculates the expected interference power that uses described the 2nd wireless telecommunication system signal that described shared frequency band sends that the receiving station (base station BS 1 or mobile radio station MT1) of described the 1st wireless communication system is caused, and notification unit (notification signal receiving and transmitting part 201), it will be notified to described the 1st wireless communication system by the described expected interference power that described expected interference power calculation section is calculated, in described dispatching station, also has communication path state estimating unit (communication path state estimating unit 206), it infers the described receiving station of described the 1st wireless communication system and the communication path state between this dispatching station, the described judging part that could send has or not the dispatching station of described the 1st wireless communication system that sends described the 1st wireless telecommunication system signal near our station according to described communication path state judgement, have more than needed when having described dispatching station more than predetermined value and near our station being judged as described interference margin, be judged as and use described shared frequency band to send described the 2nd wireless telecommunication system signal.
According to this structure, by the load information according to the 1st wireless communication system that is obtained by acquisition unit, judgement could send the 2nd wireless telecommunication system signal that use to share frequency band, can increase the send opportunity of the 2nd wireless telecommunication system signal that sends from the dispatching station of the 2nd wireless communication system.And, by notifying receiving station or dispatching station to the 1st wireless communication system by notification unit with expected interference power, the quality that can prevent the 1st wireless telecommunication system signal that the receiving station at the 1st wireless communication system receives is shared the 2nd wireless telecommunication system signal that frequency band sends and variation owing to using.
And, the invention is characterized in, in described dispatching station, described notification unit is together with described expected interference power, and also notice is used the priority level information of described the 2nd wireless telecommunication system signal of described shared frequency band transmission.
And, the invention is characterized in, in described dispatching station, described notification unit is also notified the load information of described the 2nd wireless communication system together with described expected interference power and described priority level information.
Frequency band sharing method of the present invention is used for sharing frequency band to be shared at the 1st wireless communication system and the 2nd wireless communication system, for described shared frequency band, described the 1st wireless communication system is than the described shared frequency band of the preferential use of described the 2nd wireless communication system, described frequency band sharing method is characterised in that, comprising: the radio station of described the 1st wireless communication system is notified step to the dispatching station of described the 2nd wireless communication system with the load information of described the 1st wireless communication system; The described dispatching station of described the 2nd wireless communication system is according to the load information of described the 1st wireless communication system of notifying, the interference power level that infer to allow described the 1st wireless telecommunication system signal to accept is that the difference of the suffered interference power level of tolerance limit interference level and described the 1st wireless telecommunication system signal is that interference margin is more than needed, more than needed according to the described interference margin of inferring whether predetermined value with on judge and could use described shared frequency band from the step of this dispatching station transmission the 2nd wireless telecommunication system signal; The described dispatching station of described the 2nd wireless communication system calculates the step of using the expected interference power that described the 2nd wireless telecommunication system signal that described shared frequency band sends causes the receiving station of described the 1st wireless communication system; The described dispatching station of described the 2nd wireless communication system notifies step to the described radio station of described the 1st wireless communication system with the described expected interference power that calculates; The described radio station of described the 1st wireless communication system improves the step of the interference margin of the 1st wireless telecommunication system signal that uses described shared frequency band transmission according to the described expected interference power of notifying; the described radio station of described the 1st wireless communication system switches to the frequency band of described the 1st wireless telecommunication system signal the frequency band switch step of the band occupancy of described the 1st wireless communication system from described shared frequency band, described frequency band sharing method comprises that also the described radio station of described the 1st wireless communication system obtains the priority level information of described the 1st wireless telecommunication system signal, step with the reception quality information of described the 1st wireless telecommunication system signal, in the described dispatching station of described the 2nd wireless communication system notifies the step of described expected interference power, also the priority level information of described the 2nd wireless telecommunication system signal is notified the described radio station to described the 1st wireless communication system together with described expected interference power, in described frequency band switch step, the described radio station of described the 1st wireless communication system is according to the described priority level information of described the 1st wireless telecommunication system signal and described the 2nd wireless telecommunication system signal and at least a information in described reception quality information, the frequency band of described the 1st wireless telecommunication system signal is switched to described band occupancy from described shared frequency band.
According to the present invention, provide when in the situation that comprise shared frequencies between a plurality of radio communications of priority system and non-priority system, can increase the send opportunity of the signal in non-priority system, prevent simultaneously radio station, dispatching station and the frequency band sharing method of the signal quality variation in priority system.
Fig. 3 is the figure that controls be used to the interference margin that the 1st execution mode of the present invention is described.
Fig. 4 means the flow chart of the frequency band shared processing of the 1st execution mode of the present invention.
Fig. 5 is the figure be used to the communication environment that the 1st execution mode of the present invention is described.
Fig. 6 is the figure be used to the communication environment that variation 1-1 of the present invention is described.
Fig. 7 is the figure be used to the communication environment that variation 1-2 of the present invention is described.
Fig. 8 is the figure be used to the communication environment that variation 1-3 of the present invention is described.
Figure 10 means the flow chart of the frequency band shared processing of the 2nd execution mode of the present invention.
Figure 12 distributes be used to the resource that the 3rd execution mode of the present invention is described the figure that controls.
Figure 13 means the flow chart of the frequency band shared processing of the 3rd execution mode of the present invention.
Figure 16 means the flow chart of the frequency band shared processing of the 5th execution mode of the present invention.
Figure 18 means the flow chart of the frequency band shared processing of the 6th execution mode of the present invention.
Figure 19 means the flow chart of the frequency band shared processing of the 7th execution mode of the present invention.
Below, illustrate embodiments of the present invention with reference to accompanying drawing.
And wireless communication system 1 and wireless communication system 2 are shared identical frequency band or contiguous frequency band.Wireless communication system 1 is shared frequency band than preferential use of wireless communication system 2.That is, wireless communication system 1 is priority system, and wireless communication system 2 is non-priority systems.
Wireless communication system 1 is made of base station BS 1 and mobile radio station MT1～MT12.Base station BS 1 receives upward signal UL1 from the mobile radio station MT11 that is positioned at residential quarter C1～MT12, and sends downstream signal DL1 to mobile radio station MT11～MT12.Wireless communication system 1 is for example mobile communication system.In addition, the mobile radio station MT11～MT12 of wireless communication system 1 has identical structure, so in the situation that do not need to distinguish and be called mobile radio station MT1.And said the 1st wireless telecommunication system signal refers to the general name of downstream signal DL1 and upward signal UL1.And the radio station of said wireless communication system 1 refers to the general name of base station BS 1 and mobile radio station MT1.
Wireless communication system 2 is made of base station BS 2 and mobile radio station MT21～MT22.Base station BS 2 receives upward signal UL2 from the mobile radio station MT21 that is positioned at residential quarter C2～MT22, and sends downstream signal DL2 to mobile radio station MT21～MT22.Wireless communication system 2 is for example mobile communication system or Wireless LAN system.In addition, mobile radio station MT21～MT22 has identical structure, so in the situation that do not need to distinguish and be called mobile radio station MT2.And said the 2nd wireless telecommunication system signal refers to the general name of downstream signal DL2 and upward signal UL2.And the radio station of said wireless communication system 2 refers to the general name of base station BS 2 and mobile radio station MT2.
As mentioned above, wireless communication system 1 and wireless communication system 2 use by the preferential shared frequency band that uses of wireless communication system 1.Here, the either party in 1 couple of upward signal UL1 of assumed wireless communication system or downstream signal DL1 uses shared frequency band.Equally, the either party in 2 couples of upward signal UL2 of assumed wireless communication system or downstream signal DL2 uses shared frequency band.
Below, illustrating in the 1st execution mode, the upward signal UL1 of wireless communication system 1 and the downstream signal DL2 of wireless communication system 2 will share the situation that frequency band is shared.In this case, receiving station's finger of wireless communication system 1 is received the base station BS 1 of upward signal UL1, and the dispatching station of wireless communication system 2 refers to send the base station BS 2 of downstream signal DL2.
Fig. 2 is the structure chart of the base station BS 2 of the base station BS 1 of wireless communication system 1 and wireless communication system 2.As shown in Figure 2, the base station BS 1 of wireless communication system 1 has signal transmitting and receiving section 101, load information collection unit 102, notification signal receiving and transmitting part 103 and interference margin control part 104.
Signal transmitting and receiving section 101 receives upward signal UL1 from mobile radio station MT1.And signal transmitting and receiving section 101 sends downstream signal DL1 to mobile radio station, and according to the indication of the interference margin control part 104 of narrating later, sends the interference margin control signal.
Load information collection unit 102 is collected the load information of wireless communication system 1.Here, load information refers to traffic, reception quality information of the traffic, the peripheral cell of this residential quarter etc.In the 1st execution mode, adopt for upward signal UL1 and share frequency band, so load information collection unit 102 is collected the traffic of upward signal UL1, the reception quality information of upward signal UL1 etc. as load information.
Notification signal receiving and transmitting part 103(notification unit, acquisition unit) receive and dispatch notification signals with the base station BS 2 of wireless communication system 2.The notification signal that sends to base station BS 2 comprises the load information of being collected by load information collection unit 102.And the notification signal that receives from base station BS 2 comprises the expected interference power that uses the downstream signal DL2 of shared frequency band transmission that base station BS 1 is caused from base station BS 2.
In addition, notification signal receiving and transmitting part 103 also can be received and dispatched notification signal by the backbone network that connects wireless communication system 1 and wireless communication system 2, can also receive and dispatch by the direct radio communication between base station BS 1 and base station BS 2.
Interference margin control part 104 uses the upward signal UL1 that shares the frequency band transmission to make interference margin increase according to the expected interference power from base station BS 2.Specifically, interference margin control part 104 is according to the expected interference power from base station BS 2, and indication mobile radio station MT1 improves the transmitted power of upward signal UL1 or reduces the transmission rate of upward signal UL1.
As shown in Figure 3, when making interference margin increase, even interference signal level because the expected interference power from base station BS 2 increases interference margin component more than needed, also can make the desired signal level of upward signal UL1 fixing to ratio (SIR) maintenance of interference signal level.
The base station BS 2(dispatching station of wireless communication system 2) has notification signal acceptance division 201, could send judging part 202, send parameter determination section 203, expected interference power calculation section 204 and signal transmitting and receiving section 205.
Notification signal acceptance division 201(acquisition unit, notification unit) receive from the base station BS 1 of wireless communication system 1 notification signal that comprises load information.And notification signal receiving and transmitting part 201 sends the notification signal that comprises the expected interference power that is calculated by the expected interference power calculation section 204 of narrating later to the base station BS 1 of wireless communication system 1.
Could send judging part 202 according to the load information from base station BS 1, judgement could be used and share frequency band transmission downstream signal DL2.Specifically, could send judging part 202 and infer that according to load information the interference margin of wireless communication system 1 is more than needed, and judgement infers that the interference margin that has more than needed whether more than predetermined value.In the situation that the interference margin of wireless communication system 1 is more than needed for more than predetermined value, could sends judging part 202 and be judged as and to send downstream signal DL2.In the situation that the interference margin of wireless communication system 1 is more than needed less than predetermined value, could sends judging part 202 and be judged as and to send downstream signal DL2.
Expected interference power calculation section 204 is according to by the transmitted power that sends the downstream signal DL2 that parameter determination section 203 determines, calculates to use and shares the expected interference power that downstream signal DL2 that frequency band sends causes the base station BS 1 of wireless communication system 1.
Signal transmitting and receiving section 205 sends downstream signal DL2 according to by sending the definite transmission parameter of parameter determination section 203 to mobile radio station MT2.And signal transmitting and receiving section 205 receives upward signal UL2 from mobile radio station MT2.
Below, the frequency band shared processing of the 1st execution mode is described with reference to Fig. 4 and Fig. 5.In the 1st execution mode, according to top described, the upward signal UL1 of wireless communication system 1 and the downstream signal DL2 of wireless communication system 2 share to share frequency band, in the base station BS 1(of wireless communication system 1 receiving station) and the base station BS 2(dispatching station of wireless communication system 2) between carry out the frequency band shared processing.
The notification signal that the notification signal receiving and transmitting part 103 of base station BS 1 will comprise the load information of the upward signal UL1 that collects sends to base station BS 2(step S102).The notification signal receiving and transmitting part 201 of base station BS 2 receives the notification signal (step S103) of the load information that comprises upward signal UL1 from base station BS 1.
Base station BS 2 could send judging part 202 according to the load information by the upward signal UL1 of base station BS 1 notice, judgement could send downstream signal DL2(step S104).Specifically, in the situation that infer that according to the load information of upward signal UL1 the interference margin that is more than needed for more than predetermined value, could send judging part 202 and be judged as and to send downstream signal DL2.On the other hand, in the situation that interference margin is more than needed less than predetermined value, could sends judging part 202 and be judged as and to send, and wait for the transmission (step S105) of downstream signal DL2.
Can send downstream signal DL2 in the situation that be judged as, the transmission parameter determination section 203 of base station BS 2 is determined the transmitted power of downstream signal DL2.Expected interference power calculation section 204 transmitted powers according to determined downstream signal DL2 of base station BS 2 are calculated to use and are shared the expected interference power (step S106) that downstream signal DL2 that frequency band sends causes base station BS 1.
The interference margin control part 104 of base station BS 1 is according to the expected interference power by base station BS 2 notices, and indication mobile radio station MT1 improves the transmitted power of upward signal UL1 or reduces the transmission rate (step S109) of upward signal UL1.
The signal transmitting and receiving section 205 of base station BS 2 sends downstream signal DL2(step S110 according to the transmitted power of determining at step S106 to mobile radio station MT2).
According to the base station BS 1 of the wireless communication system 1 of the 1st execution mode and the base station BS 2 of wireless communication system 2, in the situation that the downstream signal DL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, load information according to the upward signal UL1 that collects at base station BS 1, judgement could send downstream signal DL2 from base station BS 2, can increase thus the chance that sends downstream signal DL2 from base station BS 2.
And, base station BS 1 is according to the expected interference power by base station BS 2 notices, make the interference margin of upward signal UL1 increase, the quality that can prevent thus the upward signal UL1 that received by base station BS 1 is variation due to the interference of the downstream signal DL2 that sends from base station BS 2.
With reference to Fig. 6, about the frequency band shared processing of variation 1-1, by with the difference of the frequency band shared processing of above-mentioned the 1st execution mode centered by describe.In variation 1-1, mobile radio station MT2 has the structure of base station BS shown in Figure 22, in the base station BS 1(of wireless communication system 1 receiving station) and the mobile radio station MT2(dispatching station of wireless communication system 2) between, carry out above-mentioned frequency band shared processing.
Specifically, as shown in Figure 6, the mobile radio station MT2 of wireless communication system 2 receives by base station BS 2 notification signal that sends from the base station BS 1 of wireless communication system 1.Mobile radio station MT2 is according to the load information of the upward signal UL1 that comprises in notification signal, and judgement could send upward signal UL2.Mobile radio station MT2 determines the transmitted power of upward signal UL2 in the situation that be judged as and can send.Mobile radio station MT2 is according to the transmitted power of determined upward signal UL2, calculates to use and shares the expected interference power that upward signal UL2 that frequency band sends causes base station BS 1.Mobile radio station MT2 sends to the base station BS 1 of wireless communication system 1 notification signal that comprises the expected interference power that calculates.
The base station BS 1 of wireless communication system 1 sends the interference margin control signal to mobile radio station MT1.Base station BS 1 uses the interference margin control signal, and according to the expected interference power by mobile radio station MT2 notice, indication mobile radio station MT1 improves the transmitted power of upward signal UL1 or reduces the transmission rate of upward signal UL1.
According to the base station BS 1 of the wireless communication system 1 of variation 1-1 and the mobile radio station MT2 of wireless communication system 2, in the situation that the upward signal UL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, load information according to the upward signal UL1 that collects at base station BS 1, judgement could send upward signal UL2 from mobile radio station MT2, can increase thus the chance that sends upward signal UL2 from mobile radio station MT2.
And, base station BS 1 is according to the expected interference power by mobile radio station MT2 notice, improve the interference margin of upward signal UL1, the interference of the upward signal UL2 that the quality that can prevent thus the upward signal UL1 that received by base station BS 1 sends due to mobile radio station MT2 and variation.
With reference to Fig. 7, about the frequency band shared processing of variation 1-2, by with the difference of the frequency band shared processing of above-mentioned the 1st execution mode centered by describe.In variation 1-2, in the base station BS 1(of wireless communication system 1 dispatching station) and the base station BS 2(dispatching station of wireless communication system 2) between, carry out above-mentioned frequency band shared processing.
The base station BS 2 that receives notification signal calculates to use shares the expected interference power that downstream signal DL2 that frequency bands send causes mobile radio station MT1, and the notification signal that comprises the expected interference power that calculates is sent to base station BS 1.
Base station BS 1 is according to the expected interference power by base station BS 2 notices, improves for the transmitted power of the downstream signal DL1 of mobile radio station MT1 or the interference margin that reduces transmission rate and controls.
According to the base station BS 1 of the wireless communication system 1 of variation 1-2 and the base station BS 2 of wireless communication system 2, in the situation that the downstream signal DL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, load information according to the downstream signal DL1 that collects at base station BS 1, judgement could send downstream signal DL2 from base station BS 2, can increase thus the chance that sends downstream signal DL2 from base station BS 2.
And, base station BS 1 is according to the expected interference power by base station BS 2 notices, improve the interference margin of downstream signal DL1, the interference of the downstream signal DL2 that the quality that can prevent thus the downstream signal DL1 that received by mobile radio station MT1 sends due to base station BS 2 and variation.
With reference to Fig. 8, about the frequency band shared processing of variation 1-3, by with the difference of variation 1-1 and variation 1-2 centered by describe.In variation 1-3, mobile radio station MT2 has the structure of base station BS shown in Figure 22, in the base station BS 1(of wireless communication system 1 dispatching station) and the mobile radio station MT2(dispatching station of wireless communication system 2) between, carry out above-mentioned frequency band shared processing.
As shown in Figure 8, the mobile radio station MT2 of wireless communication system 2 is such according to what narrate in variation 1-1, calculates the expected interference power that uses the upward signal UL2 of shared frequency band transmission that mobile radio station MT1 is caused from mobile radio station MT2.Mobile radio station MT2 is with the expected interference power informing base station BS1 that calculates.
The base station BS 1 of wireless communication system 1 is such according to what narrate in variation 1-2, and according to the expected interference power by base station BS 2 notices, raising is for the transmitted power of the downstream signal DL1 of mobile radio station MT1 or the transmission rate of reduction downstream signal DL1.
According to the base station BS 1 of the wireless communication system 1 of variation 1-3 and the mobile radio station MT2 of wireless communication system 2, in the situation that the upward signal UL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, load information according to the downstream signal DL1 that collects at base station BS 1, judgement could send upward signal UL2 from mobile radio station MT2, can increase thus the chance that sends upward signal UL2 from mobile radio station MT2.
And, base station BS 1 is according to the expected interference power by mobile radio station MT2 notice, improve the interference margin of downstream signal DL1, the interference of the upward signal UL2 that the quality that can prevent thus the downstream signal DL1 that received by mobile radio station MT1 sends due to mobile radio station MT2 and variation.
Below, about the base station BS 2 of the wireless communication system 2 of the 2nd execution mode of the present invention, with reference to Fig. 9 and by with the difference of the 1st execution mode centered by describe.
As shown in Figure 9, the base station BS 2 of wireless communication system 2 has communication path state estimating unit 206, and this point is different from the 1st execution mode.
The communication path state estimating unit 206 of base station BS 2 is inferred the base station BS 1(receiving station of wireless communication systems 1) and the base station BS 2(dispatching station of wireless communication system 2) between the communication path state.For example, communication path state estimating unit 206 is inferred the communication path state between base station BS 1 and base station BS 2 according to the receiving intensity of the notification signal that sends from base station BS 1.And communication path state estimating unit 206 also can according to the receiving intensity from the existing code element of base station BS 1, be inferred above-mentioned communication path state.
Below, the frequency band shared processing of the 2nd execution mode is described with reference to Figure 10.In the 2nd execution mode, in the base station BS 1(of wireless communication system 1 receiving station) and the base station BS 2(dispatching station of wireless communication system 2) between carry out the frequency band shared processing.In addition, in step S201～S203 and Fig. 4 step S101～S103 is identical, so description thereof is omitted.
As mentioned above, the communication path state estimating unit 206 supposition base station BSs 1 of base station BS 2 and the communication path state (step S204) between base station BS 2.
Base station BS 2 could send judging part 202 according to by the load information of base station BS 1 notice and infer the base station BS 1 that and the communication path state between base station BS 2, judgement could send downstream signal DL2(step S205).Specifically, could send judging part 202 according to the communication path state between base station BS 1 and base station BS 2, judgement has or not the mobile radio station MT1 that will send upward signal UL1 near base station BS 2.
For example, even more than needed for predetermined value when above at the interference margin of inferring the wireless communication system 1 that according to load information, be judged as in the situation that near base station BS 2 existence to send the mobile radio station MT1 of upward signal UL1, could send judging part 202 and also be judged as and to send downstream signal DL2, wait for the transmission (step S206) of downstream signal DL2.
Can send downstream signal DL2 in the situation that be judged as, the transmission parameter determination section 203 of base station BS 2 according to infer the communication path state that, determine the transmitted power of downstream signal DL2.Expected interference power calculation section 204 bases are by the transmitted power of the definite downstream signal DL2 of transmission parameter determination section 203, the expected interference power (step S207) that calculating uses the downstream signal DL2 of shared frequency band transmission that base station BS 1 is caused.In step S208～S211 and Fig. 4 step S107～S110 is identical, so description thereof is omitted.
Base station BS 2 according to the wireless communication system 2 of the 2nd execution mode, in the situation that the downstream signal DL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, according to the communication path state between the load information of collecting at base station BS 1 and base station BS 1 and base station BS 2, judgement could send downstream signal DL2 from base station BS 2.Therefore, when in the situation that near base station BS 2 existence to send the mobile radio station MT1 of upward signal UL1, the quality that can prevent the upward signal UL1 that sends from this mobile radio station MT1 is variation due to the interference of the downstream signal DL2 that sends from base station BS 2.
In the variation 2-1 of the 2nd execution mode, share the situation (with reference to Fig. 6) of frequency band about the upward signal UL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2, by with the difference of the 2nd execution mode centered by describe.
In the frequency band shared processing of variation 2-1, mobile radio station MT2(dispatching station) has the structure of base station BS shown in Figure 92.The communication path state estimating unit 206 of mobile radio station MT2 is inferred the base station BS 1(receiving station of wireless communication systems 1) and the mobile radio station MT2(dispatching station of wireless communication system 2) between the communication path state.For example, communication path state estimating unit 206 bases are inferred above-mentioned communication path state from the receiving intensity of the existing code element of base station BS 1.
Mobile radio station MT2 according to the wireless communication system 2 of variation 2-1, in the situation that the upward signal UL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, according to the communication path state between the load information of collecting at base station BS 1 and base station BS 1 and mobile radio station MT2, judgement could send upward signal UL2 from mobile radio station MT2.Therefore, when in the situation that there is the mobile radio station MT1 will send upward signal UL1 near mobile radio station MT2, the quality that can prevent the upward signal UL1 that sends from mobile radio station MT1 is variation due to the interference of the upward signal UL2 that sends from mobile radio station MT2.
In the variation 2-2 of the 2nd execution mode, share the situation (with reference to Fig. 7) of frequency band about the downstream signal DL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2, by with the difference of the 2nd execution mode centered by describe.
In the frequency band shared processing of variation 2-2, the communication path state estimating unit of base station BS 2 206 is inferred the mobile radio station MT1(receiving station of wireless communication systems 1) and the base station BS 2(dispatching station of wireless communication system 2) between the communication path state.For example, communication path state estimating unit 206 bases of base station BS 2 are inferred above-mentioned communication path state from the existing code element of the up transmitted signal of mobile radio station MT1.Base station BS 2 could send judging part 202 according to by the load information of base station BS 1 notice and the communication path state of inferring, judgement could send downstream signal DL2 from base station BS 2.
Base station BS 2 according to the wireless communication system 2 of variation 2-2, in the situation that the downstream signal DL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, according to the communication path state between the load information of collecting at base station BS 1 and mobile radio station MT1 and base station BS 2, judgement could send downstream signal UL2 from base station BS 2.Therefore, when in the situation that near base station BS 2 existence to send the base station BS 1 of downstream signal DL1, the quality that can prevent the downstream signal DL1 that sends from base station BS 1 is variation due to the interference of the downstream signal DL2 that sends from base station BS 2.
In the variation 2-3 of the 2nd execution mode, share the situation (with reference to Fig. 8) of frequency band about the upward signal UL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2, by with the difference of the 2nd execution mode centered by describe.
In the frequency band shared processing of variation 2-3, mobile radio station MT2(dispatching station) has the structure of base station BS shown in Figure 92.The communication path state estimating unit 206 of mobile radio station MT2 is inferred the mobile radio station MT1(receiving station of wireless communication systems 1) and the mobile radio station MT2(dispatching station of wireless communication system 2) between the communication path state.For example, communication path state estimating unit 206 bases of mobile radio station MT2 are inferred above-mentioned communication path state from the existing code element of the up transmitted signal of mobile radio station MT1.Mobile radio station MT2 could send judging part 202 according to the load information of notifying and the communication path state of inferring, judgement could send upward signal UL2 from mobile radio station MT2.
Mobile radio station MT2 according to the wireless communication system 2 of variation 2-3, in the situation that the upward signal UL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2 shares frequency band, according to the communication path state between the load information of collecting at base station BS 1 and mobile radio station MT1 and mobile radio station MT2, judgement could send downstream signal UL2 from mobile radio station MT2.Therefore, when in the situation that exist to send the base station BS 1 of downstream signal DL1 near mobile radio station MT2, the quality that can prevent the downstream signal DL1 that sends from base station BS 1 is variation due to the interference of the upward signal UL2 that sends from mobile radio station MT2.
Below, about the base station BS 1 of the wireless communication system 1 of the 3rd execution mode of the present invention and the base station BS 2 of wireless communication system 2, with reference to Figure 11 and by with the difference of the 1st execution mode centered by describe.
As shown in figure 11, the base station BS 1 of wireless communication system 1 has QoS information collection component 105 and resource is distributed control part 106, and this point is different from the 1st execution mode.
The priority level information that the QoS information collection component 105 of base station BS 1 is collected wireless communication system 1.Here, priority level information for example refers to utilize the relative importance value of the signal that QoS information represents.In the 3rd execution mode, adopt for upward signal UL1 and share frequency band, so the priority level information that QoS information collection component 105 is collected upward signal UL1.
The resource distribution control part 106(frequency band switching part of base station BS 1) basis from the priority level information of the downstream signal DL2 of base station BS 2, in priority level information and at least a information in the reception quality information of the upward signal UL1 that load information collection unit 102 is collected of the upward signal UL1 that QoS information collection component 105 is collected, is carried out the resource of upward signal UL1 and is distributed control.
Here, said resource is distributed and is controlled, as shown in figure 12, and the frequency band that uses when referring to switch in transmitted signal between the band occupancy of wireless communication system 1 and shared frequency band.For example, in Figure 12, the mobile radio station MT11 that is not vulnerable to the interference between wireless communication system 1,2 and MT22(with reference to Fig. 1) frequency band be made as shared frequency band, the frequency band of the mobile radio station MT12 that easily is subject to the interference between wireless communication system 1,2 and MT21 is made as wireless communication system 1,2 band occupancy.
More particularly, in the situation that the quality of reception of upward signal UL1 is also poorer than predetermined value, resource distributes control part 106 frequency band of upward signal UL1 to be switched to the band occupancy of wireless communication system 1 from sharing frequency band.
And, also can be in the situation that the relative importance value of upward signal UL1 be higher than the relative importance value of downstream signal DL2, resource distributes control part 106 can switch to the frequency band of upward signal UL1 from sharing frequency band the band occupancy of wireless communication system 1.
The base station BS 2 of wireless communication system 2 has QoS information collection component 207 and resource is distributed control part 208, and this point is different from the 1st execution mode.
The priority level information that the QoS information collection component 207 of base station BS 2 is collected wireless communication system 2, the priority level information of especially collecting downstream signal DL2 in the 3rd execution mode.
The resource of base station BS 2 distributes control part 208 according to from the priority level information of the upward signal UL1 of base station BS 1, any information at least in the reception quality information of the priority level information of the downstream signal DL2 that QoS information collection component 207 is collected and downstream signal DL2, and the resource of carrying out downstream signal DL2 is distributed and controlled.In addition, resource distributes control part 208 to carry out such frequency band switching controls of concrete narration in the resource of base station BS 1 is distributed control part 106 for downstream signal DL2.
Below, the frequency band shared processing of the 3rd execution mode is described with reference to Figure 13.In the 3rd execution mode, the upward signal UL1 of wireless communication system 1 and the downstream signal DL2 of wireless communication system 2 share to share frequency band, in the base station BS 1(of wireless communication system 1 receiving station) and the base station BS 2(dispatching station of wireless communication system 2) between carry out the frequency band shared processing.
As shown in figure 13, load information and the priority level information (step S301) of the load information collection unit 102 of base station BS 1 and QoS information collection component 105 collection upward signal UL1.In step S302～S306 and Fig. 4 step S102～S106 is identical, so description thereof is omitted.
The notification signal receiving and transmitting part 201 of base station BS 2 sends notification signal to base station BS 1.Notification signal comprises the expected interference power that base station BS 1 caused due to the transmission of downstream signal DL2 and the priority level information (step S307) of downstream signal DL2.The notification signal receiving and transmitting part 103 of base station BS 1 is from base station BS 2 reception notification signals (step S308).
The resource of base station BS 1 distributes control part 106 according to the priority level information of the downstream signal DL2 that comprises in notification signal, at least a information in the reception quality information of the priority level information of the upward signal UL1 that step S301 collects and upward signal UL1, determines whether the frequency band of upward signal UL1 is switched to from shared frequency band the band occupancy of wireless communication system 1.Resource distributes control part 106 according to determining result, and indication mobile radio station MT1 switches the frequency band (step S309) of upward signal UL1.In step S310～S311 and Fig. 4 step S109～S110 is identical, so description thereof is omitted.
Base station BS 1 according to the wireless communication system 1 of the 3rd execution mode, in the situation that sharing frequency band, shares the downstream signal DL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2, for controlling by the interference margin of sharing in frequency band the upward signal UL1 that does not improve yet signal quality, frequency band is switched to the band occupancy of wireless communication system 1 from sharing frequency band.Therefore, even increase from the interference of using the downstream signal DL2 that shares the frequency band transmission, also can improve the quality of the upward signal UL1 of wireless communication system 1.
In the variation 3-1 of the 3rd execution mode, share the situation (with reference to Fig. 6) of frequency band about the upward signal UL2 of the upward signal UL1 of wireless communication system 1 and wireless communication system 2, by with the difference of the 3rd execution mode centered by describe.
In the frequency band shared processing of variation 3-1, mobile radio station MT2 has the structure of base station BS shown in Figure 11 2.In variation 3-1, the mobile radio station MT2(dispatching station of wireless communication system 2) to the base station BS 1(receiving station of wireless communication system 1) send the notification signal of the priority level information that comprises the expected interference power that base station BS 1 caused due to the transmission of upward signal UL2 and upward signal UL2.Base station BS 1 is according at least a information in the reception quality information of the priority level information of the priority level information of the upward signal UL2 that comprises in notification signal, upward signal UL1 and upward signal UL1, and indication mobile radio station MT1 switches to the frequency band of upward signal UL1 the band occupancy of wireless communication system 1 from sharing frequency band.
According to the base station BS 1 of the wireless communication system 1 of variation 3-1, for controlling by the interference margin of sharing in frequency band the upward signal UL1 that does not improve yet signal quality, frequency band is switched to the band occupancy of wireless communication system 1 from sharing frequency band.Therefore, even increase from the interference of using the upward signal UL2 that shares the frequency band transmission, also can improve the quality of the upward signal UL1 of wireless communication system 1.
In the variation 3-2 of the 3rd execution mode, share the situation (with reference to Fig. 7) of frequency band about the downstream signal DL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2, by with the difference of the 3rd execution mode centered by describe.
In the frequency band shared processing of variation 3-2, the base station BS 1(dispatching station of wireless communication system 1) collect the priority level information of downstream signal DL1, and according to the reception quality information of the priority level information of the downstream signal DL1 that collects, downstream signal DL1 with by the base station BS 2(dispatching station of wireless communication system 2) at least a information in the priority level information of the downstream signal DL2 of notice, the frequency band of downstream signal DL1 is switched to the band occupancy of wireless communication system 1 from sharing frequency band.
According to the base station BS 1 of the wireless communication system 1 of variation 3-2, for controlling by the interference margin of sharing in frequency band the downstream signal DL1 that does not improve yet signal quality, frequency band is switched to the band occupancy of wireless communication system 1 from sharing frequency band.Therefore, even increase from the interference of using the downstream signal DL2 that shares the frequency band transmission, also can improve the quality of the downstream signal DL1 of wireless communication system 1.
In the variation 3-3 of the 3rd execution mode, illustrate that the upward signal UL2 of the downstream signal DL1 of wireless communication system 1 and wireless communication system 2 shares the situation (with reference to Fig. 8) of frequency band.In the frequency band shared processing of variation 3-3, mobile radio station MT2 has the structure of base station BS shown in Figure 11 2, mobile radio station MT2(dispatching station) carry out the processing identical with variation 3-1.And, base station BS 1(dispatching station) and carry out the processing identical with variation 3-2.
According to the base station BS 1 of the wireless communication system 1 of variation 3-3, for controlling by the interference margin of sharing in frequency band the downstream signal DL1 that does not improve yet signal quality, frequency band is switched to the band occupancy of wireless communication system 1 from sharing frequency band.Therefore, even increase from the interference of using the upward signal UL2 that shares the frequency band transmission, also can improve the quality of the downstream signal DL1 of wireless communication system 1.
Below, about the base station BS 2 of the wireless communication system 2 of the 4th execution mode of the present invention, with reference to Figure 14 and by with the difference of the 3rd execution mode and variation 3-1～3-3 centered by describe.
In the 4th execution mode, when sharing frequency band in the situation that downstream signal DL2 is used, base station BS 2(dispatching station) has load information collection unit 209, use to share frequency band in the situation that upward signal UL2 is made as, mobile radio station MT2(dispatching station) have a load information collection unit 209.
Load information collection unit 209 is collected the load information of wireless communication system 2.Specifically, share frequency band in the situation that the downstream signal DL2 of wireless communication system 2 is made as to use, the load information collection unit 209 of base station BS 2 is collected the load information of downstream signal DL2.And, in the situation that being made as to use, the upward signal UL2 of wireless communication system 2 shares frequency band, the load information collection unit 209 of mobile radio station MT2 is collected the load information of upward signal UL2.
Notification signal receiving and transmitting part 201 sends the priority level information that comprises the expected interference power that calculated by expected interference power calculation section 204 and collected by QoS information collection component 207 and the notification signal of the load information of the wireless communication system 2 collected by load information collection unit 209 to the base station BS 1 of wireless communication system 1.
The resource of base station BS 1 distributes control part 106 according at least a information in the priority level information of the upward signal UL1 that collects by the load information of the priority level information of the downstream signal DL2 of base station BS 2 or mobile radio station MT2 notice or upward signal UL2 and wireless communication system 2 with by QoS information collection component 105 or downstream signal DL1, uses the resource of the upward signal UL1 that shares frequency band or downstream signal DL1 to distribute and controls.
For example, in the situation that the duty ratio predetermined value of notified wireless communication system 2 is low, resource distributes control part 106 frequency band of the upward signal UL1 that uses shared frequency band or downstream signal DL1 to be switched to the band occupancy of wireless communication system 1.
Base station BS 2 or mobile radio station MT2 according to the wireless communication system 2 of the 4th execution mode, the load information of wireless communication system 2 is notified the base station BS 1 of wireless communication system 1, base station BS 1 switches to the frequency band of the upward signal UL1 that uses shared frequency band or downstream signal DL1 the band occupancy of wireless communication system 1 according to the load information of wireless communication system 2.Therefore, can reduce to improve the signal quality of wireless communication system 2 owing to use sharing upward signal UL1 that frequency band sends or the downstream signal DL1 interference to wireless communication system 2.
Below, the base station BS 1 of the wireless communication system 1 of the 5th execution mode of the present invention is described with reference to Figure 15.The base station BS 1 of the 5th execution mode is only applicable to downstream signal DL1 is made as the situation of sharing frequency band of using.Therefore, in the 5th execution mode, downstream signal DL1 and the upward signal UL2 of wireless communication system 2 or the situation (with reference to Fig. 7 or Fig. 8) that downstream signal DL2 shares frequency band of wireless communication system 1 is described.
As shown in figure 15, have peripheral cell the base station BS 1(receiving station of wireless communication system 1) and disturb control part 107.Peripheral cell disturbs control part 107 according to the expected interference power by base station BS 2 notices, and the peripheral cell that carries out the residential quarter C1 of base station BS 1 disturbs to be controlled.Said peripheral cell disturbs to be controlled, and refers to the control of the interference power that the mobile radio station MT1 of residential quarter C1 caused for reducing the peripheral cell of the residential quarter C1 of base station BS 1.Specifically, peripheral cell disturbs the load of the peripheral cell base station limits downstream signal of control part 107 indicating cell C1.
Below, the frequency band shared processing of the 5th execution mode is described with reference to Figure 16.In the 5th execution mode, according to top described, the frequency band of the downstream signal DL1 of wireless communication system 1 is made as shared frequency band, in the base station BS 1(of wireless communication system 1 receiving station) and the base station BS 2 of wireless communication system 2 or mobile radio station MT2(dispatching station) between carry out the frequency band shared processing.In addition, in step S401～S408 and Fig. 4 step S101～S108 is identical, so description thereof is omitted.
According to top described, the peripheral cell of base station BS 1 disturbs control part 107 according to the expected interference power by base station BS 2 or mobile radio station MT2 notice, the load (step S409) of the peripheral cell base station limits downstream signal of indicating cell C1.Step S410, S411 are identical with step S109, S110 in Fig. 4, so description thereof is omitted.
Base station BS 1 according to the wireless communication system 1 of the 5th execution mode, in the situation that being made as, the frequency band of the downstream signal DL1 of wireless communication system 1 shares frequency band, according to the expected interference power by base station BS 2 notice, peripheral cell is carried out in the peripheral cell base station of the residential quarter C1 of base station BS 1 disturb and control.Therefore, the signal quality that can prevent downstream signal DL1 is due to from the interference of the peripheral cell of residential quarter C1 and variation, can improve downstream signal DL1 for the interference margin from the interference of wireless communication system 2.
Below, about the base station BS 1 of the wireless communication system 1 of the 6th execution mode of the present invention, with reference to Figure 17 and by with the difference of the 1st execution mode, variation 1-1～1-3 centered by describe.
In the 6th execution mode, share frequency band (with reference to Fig. 5 and Fig. 7) in the situation that the frequency band of the downstream signal DL2 of wireless communication system 2 is made as, could send judgement by what the base station BS 1 of wireless communication system 1 carried out downstream signal DL2 that the base station BS 2 of former cause wireless communication system 2 carries out.And, in the 6th execution mode, share frequency band (with reference to Fig. 6 and Fig. 8) in the situation that the frequency band of the upward signal UL2 of wireless communication system 2 is made as, could send judgement by what the base station BS 1 of wireless communication system 1 carried out upward signal UL2 that the mobile radio station MT2 of former cause wireless communication system 2 carries out.
As shown in figure 17, the base station BS 1 of wireless communication system 1 has interference margin calculating part 108 and could send judging part 109.
Interference margin calculating part 108 is according to the load information of the wireless communication system 1 of being collected by load information collection unit 102, and the interference margin that calculates wireless communication system 1 is more than needed.
Specifically, in the situation that the interference margin that is calculated by interference margin calculating part 108 is more than needed for more than the expected interference power by base station BS 2 notices, could sends judging part 109 and be judged as and to use the upward signal UL2 that shares frequency band or the transmission of downstream signal DL2.On the other hand, in the situation that the interference margin that is calculated by interference margin calculating part 108 is more than needed than little by the expected interference power of base station BS 2 notices, could sends judging part 109 and be judged as and to use the upward signal UL2 that shares frequency band or the transmission of downstream signal DL2.
Below, the frequency band shared processing of the 6th execution mode is described with reference to Figure 18.In the 6th execution mode, as mentioned above, according to which side frequency band in the downstream signal DL2 of wireless communication system 2 or upward signal UL2 is made as shared frequency band, carry out the frequency band shared processing between the base station BS 2 of the base station BS 1 of wireless communication system 1 and wireless communication system 2 or mobile radio station MT2.
The interference margin calculating part 108 of base station BS 1 calculates the interference margin (step S502) more than needed of wireless communication system 1 according to the load information of the wireless communication system 1 of being collected by load information collection unit 102.
The transmission parameter determination section 203 of base station BS 2 or mobile radio station MT2 is determined the transmitted power of downstream signal DL2 or upward signal UL2.Expected interference power calculation section 204 is according to by the transmitted power that sends parameter determination section 203 and determine, calculates to use and shares the expected interference power (step S504) that downstream signal DL2 that frequency band sends or upward signal UL2 cause base station BS 1 or mobile radio station MT1.
The notification signal that the notification signal receiving and transmitting part 201 of base station BS 2 or mobile radio station MT2 will comprise the expected interference power that calculates sends to base station BS 1(step S505).The notification signal receiving and transmitting part 103 of base station BS 1 receives the notification signal (step S506) that comprises expected interference power.
Could the sending judging part 109 judgement whether can use the downstream signal DL2 that shares frequency band or the transmission of upward signal UL2 in wireless communication system 2 of base station BS 1.Specifically, whether judgement is more than needed more than or equal to the expected interference power (step S507) in step S506 notice at the interference margin that step S502 calculates.
Can send downstream signal DL2 or upward signal UL2 in the situation that be judged as, the notification signal receiving and transmitting part 103 of base station BS 1 sends the notification signal (step S508) of the transmission license that comprises downstream signal DL2 or upward signal UL2.The interference margin control part 104 of base station BS 1 makes the interference margin rising (step S509) of upward signal UL1 or downstream signal DL1.
The notification signal receiving and transmitting part 201 of base station BS 2 or mobile radio station MT2 receives the notification signal (step S510) of the transmission license that comprises downstream signal DL2 or upward signal UL2.
In the situation that receive the transmission license of downstream signal DL2 or upward signal UL2, the signal transmitting and receiving section 205 of base station BS 2 or mobile radio station MT2 sends downstream signal DL2 or upward signal UL2(step S511 according to the transmission parameter of determining at step S504).
On the other hand, in the situation that do not receive the transmission license of downstream signal DL2 or upward signal UL2, base station BS 2 or mobile radio station MT2 wait for the transmission (step S512) of downstream signal DL2 or upward signal UL2.
According to the base station BS 1 of the wireless communication system 1 of the 6th execution mode, base station BS 1 replaces base station BS 2 or the mobile radio station MT2 of wireless communication system 2, judges whether to use the downstream signal DL2 that shares frequency band or the transmission of upward signal UL2.Therefore, can alleviate the processing load of using the base station BS 2 of sharing frequency band transmission downstream signal DL2 in wireless communication system 2 or the processing load that sends the mobile radio station MT2 of upward signal UL2.
Below, about the base station BS 2 of the wireless communication system 2 of the 7th execution mode of the present invention, with reference to Figure 19 and by with the difference of the 1st execution mode, variation 1-1～1-3 centered by describe.
In the 7th execution mode, illustrate that in the lump the upward signal UL2 of the upward signal UL1 of wireless communication system 1 or downstream signal DL1 and wireless communication system 2 or the situation that downstream signal DL2 shares frequency band are (with reference to Fig. 5～Fig. 8).According to top described, in the situation that being made as, the frequency band of downstream signal DL2 shares frequency band (with reference to Fig. 5 and Fig. 7), base station BS 2(dispatching station) have and above-mentioned could send the structures such as judging part 202, and in the situation that the frequency band of upward signal UL2 is made as shares frequency band (with reference to Fig. 6 and Fig. 8), mobile radio station MT2(dispatching station) have and above-mentioned could send the structure such as judging part 202.
As shown in figure 19, could send judging part 202 such according to what narrate in above-mentioned the 1st～the 6th execution mode, whether judgement is more than needed according to the interference margin of inferring the wireless communication system 1 that from the load information of base station BS 1 than predetermined value large (step S604).
Could send judging part 202 except the once judgement that could send of step S604, the also comparison more than needed according to the expected interference power that is calculated by expected interference power calculation section 204 and the interference margin of wireless communication system 1, the secondary that carries out sending judges (step S607).Specifically, in the situation that interference margin is more than needed for more than expected interference power, could send judging part 202 and be judged as and to send downstream signal DL2 or upward signal UL2, in the interference margin situation less than expected interference power more than needed, be judged as and to send.
Base station BS 2 or mobile radio station MT2 according to the wireless communication system 2 of the 7th execution mode, base station BS 2 or mobile radio station MT2 not only carry out sending the once judgement of downstream signal DL2 or upward signal UL2, and the secondary that relatively carries out sending of and expected interference power more than needed according to the interference margin of wireless communication system 1 judges.Therefore, even the interference margin of wireless communication system 1 is more than needed how much have more than needed, in the situation that more than needed (for example over interference margin from the expected interference power of the downstream signal DL2 that uses shared frequency band to send or upward signal UL2, it is inferior that the receiver of wireless communication system 1 and the transmitter of wireless communication system are in the situation of approaching position), also can prevent from using the upward signal UL1 that shares frequency band or the degradation of downstream signal DL1 in wireless communication system 1.
In the variation of the 1st execution mode～the 5th execution mode and correspondence, send parameter determination section 203 next definite use more than needed according to the interference margin of wireless communication system 1 and share the downstream signal DL2 of frequency band or the transmitted power of upward signal UL2, but it is more than needed also transmitted power can be specified to the interference margin that is no more than wireless communication system 1.According to this method, can use the interference margin of wireless communication system 1 more than needed until the operable limit of wireless communication system 2.
in the 3rd execution mode and variation 3-1～3-3, following situation has been described, namely, the resource of the base station BS 1 of wireless communication system 1 shown in Figure 11 is distributed control part 106 according to downstream signal DL2(or the upward signal UL2 of wireless communication system 2) priority level information, the upward signal UL1(of wireless communication system 1 or downstream signal UL1) priority level information, the upward signal UL1(of wireless communication system 1 or downstream signal UL1) reception quality information at least a information, carry out upward signal UL1(or the downstream signal UL1 of wireless communication system 1) resource situation about distribute controlling.But resource distributes the control part 106 also can be not according to above-mentioned priority level information, and according to the easy degree that is subjected to from the interference of the dispatching station of wireless communication system 2, and the resource of carrying out wireless communication system 1 is distributed and controlled.
For example, resource distribute control part 106 also can according to receive in wireless communication system 1 receiving station (base station BS 1 or mobile radio station MT1) that uses the signal of sharing frequency band, with send the estimation result of the communication path state between the dispatching station (base station BS 2 or mobile radio station MT2) that uses the signal of sharing frequency band in wireless communication system 2, carry out the resource of wireless communication system 1 and distribute control.Equally, the base station BS 2(of wireless communication system 2 shown in Figure 11 or mobile radio station MT2) resource distribute the control part 208 also can be according to the estimation result of above-mentioned communication path state, the resource that carry out wireless communication system 2 is distributed and is controlled.In addition, as narrating in the 2nd execution mode and variation 2-1～2-3, above-mentioned communication path state also can be inferred by communication path state estimating unit 206 shown in Figure 9.
In the 7th execution mode, as shown in figure 19, for whether using the downstream signal DL2 of shared frequency band or the transmission of upward signal UL2, once judgement (step S604) and secondary judgement (step S607) have been carried out, but can once not judge yet, and only carry out the secondary judgement.
In the variation of above-mentioned execution mode and correspondence, no matter illustrated in the situation that the up link UL1 of wireless communication system 1 is made as share frequency band (with reference to Fig. 5,6), or in the situation that the down link DL1 of wireless communication system 1 is made as shares frequency band (with reference to Fig. 7,8), be all the situation of interference margin control of being undertaken by base station BS 1.But, also can carry out interference margin control by the receiving station that receives with the signal of sharing frequency band in wireless communication system 1.More particularly, also can constitute in the situation that the up link UL1 of wireless communication system 1 is made as shared frequency band, as mentioned above, carrying out interference margin by base station BS 1 controls, share frequency band in the situation that the down link DL1 of wireless communication system 1 is made as, carry out interference margin by mobile radio station MT1 and control.
In the situation that the down link DL1 of wireless communication system 1 is made as shared frequency band and carries out interference margin by mobile radio station MT1 and control, mobile radio station MT1 has the structure of base station BS shown in Figure 21.In this case, the load information collection unit 102 of mobile radio station MT1 is collected load information (reception quality information of the traffic of downstream signal DL1, downstream signal DL1 etc.).The notification signal receiving and transmitting part 103 of mobile radio station MT1 is given its notice and use the dispatching station (base station BS 2 or mobile radio station MT2) of sharing the frequency band transmitted signal in wireless communication system 2.The interference margin control part 104 of mobile radio station MT1 uses the interference margin of the downstream signal DL1 that shares the frequency band transmission to rise according to the expected interference power by this dispatching station notice.Specifically, mobile radio station MT2 is according to notified expected interference power, and indication base station BS 1 improves the transmitted power of downstream signal DL1 or reduces the transmission rate of downstream signal DL1.
And, also can be with the textural association of the 1st execution mode～the 5th execution mode and the 7th execution mode and other execution modes.And, the invention is not restricted to above-mentioned execution mode, also can carry out various changes.For example, under the prerequisite that does not depart from the scope of the present invention, also can suitably change and implement about handling part and treatment step.In addition, also can suitably change and implement under the prerequisite that does not depart from the scope of the present invention.
1. radio station, it controls the 1st wireless telecommunication system signal that sends with sharing frequency band, and for described shared frequency band, the 1st wireless communication system is than the described shared frequency band of the preferential use of the 2nd wireless communication system, and described radio station is characterised in that to have:
Notification unit, its load information with described the 1st wireless communication system is notified the dispatching station to described the 2nd wireless communication system;
The interference margin control part, it improves the interference margin of described the 1st wireless telecommunication system signal that uses described shared frequency band transmission according to the described expected interference power of being obtained by described acquisition unit,
Described radio station also has the frequency band switching part, and the frequency band of its described the 1st wireless telecommunication system signal switches to the band occupancy of described the 1st wireless communication system from described shared frequency band,
Described acquisition unit also obtains the priority level information of described the 1st wireless telecommunication system signal and described the 2nd wireless telecommunication system signal and the reception quality information of described the 1st wireless telecommunication system signal together with described expected interference power,
Described frequency band switching part switches to described band occupancy to the frequency band of described the 1st wireless telecommunication system signal from described shared frequency band according at least a information in described priority level information and described reception quality information.
2. radio station according to claim 1, it is characterized in that, described interference margin control part improves the transmitted power of described the 1st wireless telecommunication system signal or reduces the transmission rate of the 1st wireless telecommunication system signal, even so that the receiving station of described the 1st wireless communication system has been subject to the described expected interference power that caused by described the 2nd wireless telecommunication system signal, also keep the signal quality of described the 1st wireless telecommunication system signal.
3. radio station according to claim 1, is characterized in that, described acquisition unit also obtains the load information of described the 2nd wireless communication system together with described expected interference power, described priority level information and described reception quality information,
4. radio station according to claim 1, it is characterized in that, described radio station also has peripheral cell and disturbs control part, and it is according to the described expected interference power of being obtained by described acquisition unit, reduces the interference power that the described receiving station of described the 1st wireless communication system is caused from peripheral cell.
5. dispatching station, it uses shares frequency band to receiving station's transmission the 2nd wireless telecommunication system signal of the 2nd wireless communication system, and for described shared frequency band, the 1st wireless communication system is than the described shared frequency band of the preferential use of described the 2nd wireless communication system, described dispatching station is characterised in that to have:
Could send judging part, it is according to the described load information of being obtained by described acquisition unit, the interference power level that infer to allow described the 1st wireless telecommunication system signal to accept is that the difference of the suffered interference power level of tolerance limit interference level and described the 1st wireless telecommunication system signal is that interference margin is more than needed, more than needed according to the described interference margin of inferring whether predetermined value with on judge and could use described the 2nd wireless telecommunication system signal of described shared frequency band transmission;
Expected interference power calculation section, the expected interference power that it calculate to use described the 2nd wireless telecommunication system signal that described shared frequency band sends that the receiving station of described the 1st wireless communication system is caused; With
Notification unit, it will be notified to described the 1st wireless communication system by the described expected interference power that described expected interference power calculation section is calculated, described dispatching station also has communication path state estimating unit, it infers the described receiving station of described the 1st wireless communication system and the communication path state between this dispatching station
The described judging part that could send has or not the dispatching station of described the 1st wireless communication system that sends described the 1st wireless telecommunication system signal near our station according to described communication path state judgement, have more than needed when having described dispatching station more than predetermined value and near our station being judged as described interference margin, be judged as and use described shared frequency band to send described the 2nd wireless telecommunication system signal.
6. dispatching station according to claim 5, is characterized in that, described notification unit is together with described expected interference power, and also notice is used the priority level information of described the 2nd wireless telecommunication system signal of described shared frequency band transmission.
7. dispatching station according to claim 6, is characterized in that, described notification unit is also notified the load information of described the 2nd wireless communication system together with described expected interference power and described priority level information.
8. frequency band sharing method, being used for sharing frequency band shares at the 1st wireless communication system and the 2nd wireless communication system, for described shared frequency band, described the 1st wireless communication system is than the described shared frequency band of the preferential use of described the 2nd wireless communication system, described frequency band sharing method is characterised in that, comprising:
The radio station of described the 1st wireless communication system is notified step to the dispatching station of described the 2nd wireless communication system with the load information of described the 1st wireless communication system;
The described dispatching station of described the 2nd wireless communication system is according to the load information of described the 1st wireless communication system of notifying, the interference power level that infer to allow described the 1st wireless telecommunication system signal to accept is that the difference of the suffered interference power level of tolerance limit interference level and described the 1st wireless telecommunication system signal is that interference margin is more than needed, more than needed according to the described interference margin of inferring whether predetermined value with on judge and could use described shared frequency band from the step of this dispatching station transmission the 2nd wireless telecommunication system signal;
The described dispatching station of described the 2nd wireless communication system notifies step to the described radio station of described the 1st wireless communication system with the described expected interference power that calculates;
The described radio station of described the 1st wireless communication system improves the step of the interference margin of the 1st wireless telecommunication system signal that uses described shared frequency band transmission according to the described expected interference power of notifying;
The described radio station of described the 1st wireless communication system switches to the frequency band of described the 1st wireless telecommunication system signal the frequency band switch step of the band occupancy of described the 1st wireless communication system from described shared frequency band,
Described frequency band sharing method comprises that also the described radio station of described the 1st wireless communication system obtains the step of the reception quality information of the priority level information of described the 1st wireless telecommunication system signal and described the 1st wireless telecommunication system signal,
In the described dispatching station of described the 2nd wireless communication system notifies the step of described expected interference power, also the priority level information of described the 2nd wireless telecommunication system signal is notified the described radio station to described the 1st wireless communication system together with described expected interference power
In described frequency band switch step, the described radio station of described the 1st wireless communication system switches to described band occupancy to the frequency band of described the 1st wireless telecommunication system signal from described shared frequency band according to the described priority level information of described the 1st wireless telecommunication system signal and described the 2nd wireless telecommunication system signal and at least a information in described reception quality information.
CN101951610A CN101951610A (en) 2011-01-19
CN101951610B true CN101951610B (en) 2013-11-06
WO2014007158A1 (en) 2012-07-04 2014-01-09 株式会社日立国際電気 Wireless communication system, transmission power control method, and network control apparatus
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