WO2018127959A1

WO2018127959A1 - Communication device, transmission control method, and wireless communication system

Info

Publication number: WO2018127959A1
Application number: PCT/JP2017/000169
Authority: WO
Inventors: 武志芥川; 義博河▲崎▼
Original assignee: 富士通株式会社
Priority date: 2017-01-05
Filing date: 2017-01-05
Publication date: 2018-07-12

Abstract

A base station 2 transmits a plurality of downlink pilot signals to a mobile station 3 using a plurality of frequencies within a wireless signal and receives a plurality of uplink pilot signals from the mobile station 3 using a plurality of frequencies. The base station 2 has a report-requesting unit 51, a transmission unit 13, and a first control unit 54. The report-requesting unit 51 requests the mobile station 3 to measure the wireless quality of a first signal to be measured among the plurality of downlink pilot signals. The transmission unit 13 makes controllable the output of the first signal to be measured and transmits a downlink pilot signal including the first signal to be measured to the mobile station 3. The first control unit 54 receives the wireless quality of the first signal to be measured that was measured by the mobile station 3 and controls the transmission of a wireless signal to the mobile station 3 on the basis of the wireless quality.

Description

COMMUNICATION DEVICE, TRANSMISSION CONTROL METHOD, AND RADIO COMMUNICATION SYSTEM

The present invention relates to a communication device, a transmission control method, and a wireless communication system.

In the 5th generation mobile communication wireless communication system defined by 3GPP (Third Generation Partnership Project), for example, a multi-element antenna is used as a base station side antenna in a millimeter wave band such as 24 GHz to 40 GHz band or 66 GHz to 86 GHz band. Is done. However, when the number of antenna elements increases, not only the number of DL (Down Link) pilot signals measured by the mobile station, but also the measurement results such as CQI (Channel Quality Indicator) reported by the mobile station to the base station. The amount also increases. Therefore, in the wireless communication system, the amount of measurement results reported by the mobile station to the base station by adopting TDD (Time Division Duplex) that can use the symmetry of the radio link between DL and UL (Up Link). There are known methods for reducing the above. Furthermore, the base station measures the SIR (Signal to Interference Ratio) of the UL pilot signal from the mobile station, determines other MCS (Modulation and Coding Scheme) values corresponding to the measured SIR, and other information. DL data signal transmission is controlled (transmission power setting, transmission frequency region position determination, phase setting between transmission antennas, etc.).

Japanese Unexamined Patent Publication No. 2016-105659 JP 2016-115949 A International Publication No. 2008/146494 JP 2016-115949 A

However, in a radio communication system employing the TDD scheme, radio quality such as a UL radio interference state is different from radio quality such as a DL radio interference state. As a result, the base station cannot ensure the communication quality of the DL data signal because the MCS value corresponding to the measurement SIR of the UL pilot signal does not reflect the actual radio quality of the DL. For example, in an environment where there is less UL radio interference compared to DL, the UL side SIR measured by the base station is better than the DL side SIR measured by the mobile station, and the base station becomes the mobile station. On the other hand, the MCS value applied to the DL data signal to be transmitted is higher than the actual DL radio quality. As a result, the mobile station is likely to fail to receive the DL data signal.

An object of one aspect is to provide a communication device, a transmission control method, and a wireless communication system that can ensure communication characteristics suitable for actual wireless quality.

A communication apparatus according to one aspect transmits a plurality of first pilot signals using a plurality of frequencies in a radio signal to another communication apparatus, and uses the plurality of frequencies from the other communication apparatus. A plurality of second pilot signals are received. The communication device includes a request unit, a transmission unit, and a reception unit. The requesting unit requests the other communication device to measure the radio quality before and after the output control of the designated first measurement target signal among the plurality of first pilot signals. The transmission unit can control the output of the first measurement target signal, and transmits the first pilot signal including the first measurement target signal to the other communication device. The receiving unit receives the wireless quality of the first measurement target signal measured by the other communication device.

In one aspect, communication characteristics suitable for the actual wireless quality can be secured.

FIG. 1 is an explanatory diagram of an example of a wireless communication system according to the first embodiment. FIG. 2 is a block diagram illustrating an example of a base station. FIG. 3 is an explanatory diagram showing an example of a functional configuration of the first line control unit in the base station. FIG. 4 is a block diagram illustrating an example of a mobile station. FIG. 5 is an explanatory diagram showing an example of a functional configuration of the second line control unit in the mobile station. FIG. 6 is an explanatory diagram illustrating an example of a resource block configuration of a subframe. FIG. 7 is an explanatory diagram illustrating an example of a management table for identifying a measurement target signal in a subframe. FIG. 8 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process of the first embodiment. FIG. 9 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process of the first embodiment. FIG. 10 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process of the second embodiment. FIG. 11 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process according to the second embodiment. FIG. 12 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process according to the second embodiment. FIG. 13 is a sequence diagram illustrating an example of processing operations of the base station and the mobile station related to the transmission output control process according to the second embodiment. FIG. 14 is an explanatory diagram illustrating an example of a hardware configuration of a communication device that implements a base station. FIG. 15 is an explanatory diagram illustrating an example of a hardware configuration of a communication device that implements a mobile station.

Hereinafter, embodiments of a communication device, a transmission control method, and a wireless communication system disclosed in the present application will be described in detail based on the drawings. The disclosed technology is not limited by each embodiment. Moreover, you may combine suitably each Example shown below in the range which does not cause contradiction.

FIG. 1 is an explanatory diagram illustrating an example of a wireless communication system 1 according to the first embodiment. A wireless communication system 1 illustrated in FIG. 1 includes a base station 2 and a plurality of mobile stations 3. The base station 2 is a communication device that transmits and receives, for example, a TDD (Time Division Duplex) wireless signal to and from the mobile station 3. The base station 2 transmits a DL (Down Link) signal of a radio signal to the mobile station 3. The base station 2 receives a radio link UL (Up Link) signal from the mobile station 3.

FIG. 2 is a block diagram illustrating an example of the base station 2. The base station 2 illustrated in FIG. 2 includes a communication antenna 11, a reception unit 12, a transmission unit 13, and a control unit 14. The reception unit 12 includes a first reception unit 21, a reception multiple access processing unit 22, a first demodulation unit 23, a line quality extraction unit 24, and a transmission power extraction unit 25. The line quality extraction unit 24 includes a first SIR measurement unit 24A and a first phase measurement unit 24B. The first receiving unit 21 receives the UL signal from the mobile station 3 by the communication antenna 11. The reception multiple access processing unit 22 executes multiple access processing for time-division of UL signals. The first demodulator 23 demodulates and decodes the time-division UL signal to acquire reception data, and outputs the acquired reception data. The line quality extraction unit 24 extracts the line quality of the UL signal. The transmission power extraction unit 25 extracts the transmission power of the UL signal. The first SIR measurement unit 24A measures the SIR of the UL signal. The first phase measurement unit 24B measures the amplitude phase of the UL signal.

The transmission unit 13 includes a first transmission power control unit 31, a first modulation unit 32, a transmission multiple processing connection unit 33, a first transmission unit 34, a broadcast information generation unit 35, and a first pilot. A generation unit 36 and a first control information generation unit 37 are included. The first transmission power control unit 31 controls the transmission power of the DL signal that transmits the transmission data. The first modulation unit 32 encodes and modulates transmission data after transmission power control. The transmission multiple process connection unit 33 executes a multiple access process for time-division multiplexing modulated transmission data. The first transmitter 34 wirelessly transmits time-division multiplexed transmission data from the communication antenna 11 to the mobile station 3 as a DL signal. The broadcast information generation unit 35 generates broadcast information to be added to transmission data. The first pilot generator 36 generates a DL pilot signal for the mobile station 3. The first control information generation unit 37 generates control information to be added to transmission data. The first control information generation unit 37 generates control information for instructing a request directly or indirectly.

The control unit 14 includes a first storage unit 41 and a first line control unit 42. The first storage unit 41 is an area for storing various types of information. The first line control unit 42 controls the entire base station 2. FIG. 3 is an explanatory diagram illustrating an example of a functional configuration of the first line control unit 42. The first line control unit 42 illustrated in FIG. 3 includes a report request unit 51, a report reception unit 52, a power control unit 53, and a first control unit 54. The report request unit 51 uses the TDD control signal to request the mobile station 3 to measure the radio quality of the first measurement target signal among the plurality of DL pilot signals, and the first measurement target The mobile station 3 is requested to report the signal measurement result. The first measurement target signal is a designated DL pilot signal that requires measurement of radio quality, for example, SIR and amplitude phase, among a plurality of DL pilot signals. The first measurement target signal is, for example, designated DL pilot signals D1 and D5 shown in FIG. The report request unit 51 requests the mobile station 3 to measure the DL side SIR at the normal power of the first measurement target signal D1 in the DL pilot signal and the DL side SIR at the zero power of the first measurement target signal D5. To do. In addition, the report request unit 51 moves the measurement of the DL side amplitude phase at the normal power of the first measurement target signal D1 and the DL side amplitude phase at the zero power of the first measurement target signal D5 in the DL pilot signal. Request to station 3. For convenience of explanation, the DL pilot signal D1 and the DL pilot signal D5 are exemplified as the first measurement target signal. However, an arbitrary DL pilot signal can be designated from among a plurality of DL pilot signals. Although the transmission power of the DL pilot signal D1 is normal power and the transmission power of the DL pilot signal D5 is zero power, the present invention is not limited to this, and the DL pilot signal D1 is zero power and the DL pilot signal D5 is normal power. And can be changed as appropriate.

The report receiving unit 52 receives from the mobile station 3 reports of measurement results of the first measurement target signals D1 and D5 of the DL pilot signal. The measurement result of the first measurement target signal is the DL side SIR and DL side amplitude phase at the normal power of the first measurement target signal D1, and the DL side SIR and DL side at the zero power of the first measurement target signal D5. Amplitude phase. The power control unit 53 controls the first transmission power control unit 31 to control ON / OFF of the transmission power of the first measurement target signals D1 and D5 in the DL pilot signal. The power control unit 53 controls the transmission power of the first measurement target signal D1 to ON to control normal power, and controls the transmission power of the first measurement target signal D5 to OFF to zero power. The first control unit 54 includes a first calculation unit 54A, a second calculation unit 54B, a first adjustment unit 54C, and a second adjustment unit 54D. The first control unit 54 receives from the mobile station 3 information related to the radio quality of the first measurement target signal measured by the mobile station 3 and transmits to the mobile station 3 based on the radio quality. Signal transmission is controlled (MCS determination, transmission power setting, transmission frequency region position determination, phase setting between transmission antennas, etc.).

The first calculation unit 54A compares the DL side SIR at the normal power of the first measurement target signal D1 with the DL side SIR at the zero power of the first measurement target signal D5 to calculate the DL side interference power. To do. Further, the first calculation unit 54A includes the UL side SIR and the second measurement target signal U5 at the normal power of the second measurement target signal U1 in the UL pilot signal measured by the first SIR measurement unit 24A. The UL side interference power is calculated by comparing with the UL side SIR at the time of zero power. The first SIR measurement unit 24A measures the UL side SIR at the normal power of the second measurement target signal U1 in the UL pilot signal and the UL side SIR at the zero power of the second measurement target signal U5. To do. The UL pilot signal uses the same frequency as that of the DL pilot signal in a time multiplexed manner. For example, the DL pilot signal D1 and the UL pilot signal U1 shown in FIG. 6 have the same frequency. The first calculation unit 54A calculates the adjusted SIR by comparing the DL side interference power and the UL side interference power. Further, the first calculation unit 54A acquires an MCS value corresponding to the adjustment SIR.

The second calculation unit 54B compares the DL side amplitude phase at the normal power of the first measurement target signal D1 and the DL side amplitude phase at the zero power of the first measurement target signal D5 to compare the DL side phase change. Calculate the amount. Furthermore, the second calculation unit 54B includes the UL-side amplitude phase and the second measurement target signal during normal power of the second measurement target signal U1 in the UL pilot signal measured by the first phase measurement unit 24B. The UL side phase change amount is calculated by comparing the UL side amplitude phase at zero power of U5. The first phase measurement unit 24B includes the UL side amplitude phase at the normal power of the second measurement target signal U1 in the UL pilot signal and the UL side amplitude phase at the zero power of the second measurement target signal U5. Measure. The second calculation unit 54B calculates the adjustment phase change amount by comparing the DL side phase change amount and the UL side phase change amount.

The first adjustment unit 54C adjusts the block size of the DL data signal, for example, based on the MCS value acquired by the first calculation unit 54A. The second adjustment unit 54D adjusts the phase of the RF circuit, for example, based on the adjustment phase change amount calculated by the second calculation unit 54B.

FIG. 4 is a block diagram illustrating an example of the mobile station 3. The mobile station 3 illustrated in FIG. 4 includes a terminal-side communication antenna 61, a terminal-side receiving unit 62, a terminal-side transmitting unit 63, and a terminal-side control unit 64. The terminal side receiving unit 62 includes a second receiving unit 71, a reception orthogonal multiple access processing unit 72, a second demodulating unit 73, a system information extracting unit 74, a control information extracting unit 75, and a second line. And a quality extraction unit 76. The second receiver 71 receives the DL signal from the base station 2 by the terminal-side communication antenna 61. The reception multiple access processing unit 72 executes multiple access processing that time-divides the DL signal. The second demodulator 73 demodulates and decodes the time-divided DL signal to acquire reception data, and outputs the acquired reception data. The system information extraction unit 74 extracts system information in the received data. The control information extraction unit 75 extracts a DL control signal. The second line quality extraction unit 76 extracts the line quality of the DL signal. The second line quality extraction unit 76 includes a second SIR measurement unit 76A and a second phase measurement unit 76B. The second SIR measurement unit 76A measures the SIR of the DL signal. The second phase measurement unit 76B measures the amplitude phase of the DL signal.

The terminal-side transmission unit 63 includes a second transmission power control unit 81, a second modulation unit 82, a transmission orthogonal multiple access processing unit 83, a second transmission unit 84, and a second control information generation unit 85. And a second pilot generation unit 86. The second transmission power control unit 81 controls the transmission power of the UL signal that transmits the transmission data. The second modulation unit 82 encodes and modulates transmission data after transmission power control. The transmission multiple process connection unit 83 executes a multiple access process for time-division multiplexing modulated transmission data. The second transmitter 84 wirelessly transmits time-division multiplexed transmission data from the terminal-side communication antenna 61 to the base station 2 as a UL signal. The second control information generation unit 85 generates control information to be added to the transmission data. The second pilot generation unit 86 generates a UL pilot signal for the base station 2.

The terminal-side control unit 64 includes a second storage unit 91, a terminal control unit 92, and a second line control unit 93. The second storage unit 91 is an area for storing various information. The second storage unit 91 is an area for storing, for example, the DL side SIR and the DL side amplitude phase. The terminal control unit 92 controls the RF circuit in the mobile station 3. The RF circuit includes, for example, a second reception unit 71, a reception orthogonal multiple access processing unit 72, a second demodulation unit 73, a second modulation unit 82, a transmission orthogonal multiple access processing unit 83, and a second transmission unit. 84 etc. The second line control unit 93 controls the entire mobile station 3. FIG. 5 is an explanatory diagram showing an example of a functional configuration of the second line control unit 93 in the mobile station 3. The second line control unit 93 illustrated in FIG. 5 includes a report unit 93A, a second power control unit 93B, and a second control unit 93C.

The second SIR measurement unit 76A determines the DL side SIR at the normal power of the first measurement target signal D1 and the DL side SIR at the zero power of the first measurement target signal D5 in response to the DL pilot signal measurement request. taking measurement. The second phase measurement unit 76B responds to the DL pilot signal measurement request, and the DL side amplitude phase at the normal power of the first measurement target signal D1 and the DL side amplitude at the zero power of the first measurement target signal D5. Measure the phase. The reporting unit 93A reports the DL pilot signal measurement result to the base station 2 using a UL pilot signal. The measurement results include, for example, the DL side SIR at the normal power of the first measurement target signal D1 of the DL pilot signal and the zero power of the first measurement target signal D5, and the normal power of the first measurement target signal D1. And the DL side amplitude phase at the time of zero power of the first measurement target signal D5.

The second power control unit 93B controls the second transmission power control unit 81 so as to perform ON / OFF control of the transmission power of the second measurement target signals U1 and U5 of the UL pilot signal. The second power control unit 93B controls the transmission power of the second measurement target signal U1 in the UL pilot signal to ON to control normal power, and controls the transmission power of the second measurement target signal U5 to OFF to zero power. To do. The second control unit 93C controls the entire second line control unit 93.

FIG. 6 is an explanatory diagram showing an example of the configuration of resource blocks in a subframe. The subframe illustrated in FIG. 6 is, for example, a self-contained TDD subframe. The subframe shown in FIG. 6 time-divides the control signal, DL section, guard section, and UL section, and the control signal, DL section, and UL section use the same frequency band. The control signal is an RB (Resource Block) used for transferring control information of Layer1. The DL section is an RB used for transferring a DL pilot signal and a DL data signal. The UL section is an RB used for transferring UL pilot signals and UL data signals. The DL pilot signal is, for example, an RB on which DL pilot signals D1 to D8 are mounted using frequencies F1 to F16. For example, the DL pilot signal D1 is mounted on the frequencies F1 and F9, the DL pilot signal D2 is mounted on the frequencies F2 and F10, the DL pilot signal D3 is mounted on the frequencies F3 and F11, and the DL pilot signal D4 is mounted on the frequencies F4 and F12. Also, DL pilot signal D5 is mounted on frequencies F5 and F13, DL pilot signal D6 is mounted on frequencies F6 and F14, DL pilot signal D7 is mounted on frequencies F7 and F15, and DL pilot signal D8 is mounted on frequencies F8 and F16. The UL pilot signal is, for example, an RB on which the UL pilot signals U1 to U8 are mounted using the same frequencies F1 to F16 as in the DL section. For example, the UL pilot signal U1 is mounted on the frequencies F1 and F9, the UL pilot signal U2 is mounted on the frequencies F2 and F10, the UL pilot signal U3 is mounted on the frequencies F3 and F11, and the UL pilot signal U4 is mounted on the frequencies F4 and F12. UL pilot signal U5 is mounted on frequencies F5 and F13, UL pilot signal U6 is mounted on frequencies F6 and F14, UL pilot signal U7 is mounted on frequencies F7 and F15, and UL pilot signal U8 is mounted on frequencies F8 and F16. For convenience of explanation, the first measurement target signal includes the DL pilot signal D1 having the frequency F1, the DL pilot signal D5 having the frequency F5, and the second measurement target signal includes the UL pilot signal U1 having the frequency F1 and the frequency F5. UL pilot signal U5 is designated.

FIG. 7 is an explanatory diagram showing an example of a management table for identifying measurement target signals in subframes. The management table is a table for managing a 3-bit ID for identifying DL pilot signals of D1 to D8 of subframes. Note that the management table is stored in a partial area of the first storage unit 41. The ID identifies the DL pilot signal by F1 to F8 used for the DL pilot signals D1 to D8 among the plurality of frequencies F1 to F16. It is assumed that the UL pilot signal similarly manages a 3-bit ID.

Next, the operation of the wireless communication system 1 according to the first embodiment will be described. 8 and 9 are sequence diagrams illustrating an example of processing operations of the base station 2 and the mobile station 3 related to the transmission output control process of the first embodiment.

In FIG. 8, the report request unit 51 in the base station 2 generates control information for the mobile station 3 (step S11). The control information includes position information of the first measurement target signal of the DL pilot signal, measurement request of the first measurement target signal, amplitude presence / absence information, report request, terminal setting information, report type, and the like. The position information is information for identifying, for example, frequency positions of two first measurement target signals among the plurality of DL pilot signals D1 to D8 in the DL pilot signal. The first measurement target signal is, for example, a DL pilot signal D1 mounted on the frequency F1 and a DL pilot signal D5 mounted on the frequency F5. The measurement request is information that requests the mobile station 3 to measure the radio quality of the first measurement target signals D1 and D5, for example, SIR and amplitude phase. The amplitude presence / absence information is information for setting the transmission power of the first measurement target signal D1 to normal power and the transmission power of the first measurement target signal D5 to zero power. The report request is information requesting the mobile station 3 to report the radio quality measurement results of the first measurement target signals D1 and D5, for example, SIR and amplitude phase. The terminal setting information is the setting contents of the mobile station 3, for example, the position information of the second measurement target signal of the UL pilot signal, the MCS value to be used, the transmission power amount output by the mobile station 3, and the like. The report type is information for identifying report contents such as radio quality of the DL pilot signal, for example, CQI, SIR, amplitude phase and the like.

The report request unit 51 in the base station 2 stores the control information in the Layer-1 control signal (step S12), and transmits the control signal to the mobile station 3 (step S13). When receiving the control signal from the base station 2 (step S14), the second control unit 93C in the mobile station 3 extracts the control information from the control signal (step S15), and sets the terminal setting in the extracted control information. Information is set (step S16). In addition, after transmitting the control signal in step S13, the power control unit 53 in the base station 2 designates the first measurement target signal, and normal power is set as the transmission power of the designated first measurement target signal D1. Then, zero power is set as the transmission power of the first measurement target signal D5 (step S17).

The power control unit 53 in the base station 2 transmits a DL pilot signal to the mobile station 3 after setting the transmission power in step S17 (step S18). When receiving the DL pilot signal (step S19), the second phase measuring unit 76B in the mobile station 3 measures the DL side amplitude phase at the time of normal power and zero power (step S20). The second phase measurement unit 76B measures the amplitude phase of the first measurement target signal D1 in the DL pilot signal as the DL side amplitude phase at the normal power, and the first measurement target in the DL pilot signal. The amplitude phase of the frequency of the signal D5 is measured as the DL side amplitude phase at zero power.

Furthermore, the second SIR measurement unit 76A in the mobile station 3 measures the DL side SIR at the normal power and zero power of the first measurement target signal in the DL pilot signal (step S21). The second SIR measurement unit 76A measures the SIR of the first measurement target signal D1 in the DL pilot signal as the DL side SIR at the normal power and sets the SIR of the first measurement target signal D5 to zero power. Measured as the DL side SIR of the hour. The reporting unit 93A in the mobile station 3 stores the DL-side amplitude phase and the DL-side SIR at the normal power of the first measurement target signal D1 and the zero power of the first measurement target signal D5 in the second storage unit 91. Store (step S22). Then, the reporting unit 93A stores the DL side amplitude phase and the DL side SIR at the time of normal power and zero power in the UL pilot signal (step S23), and transmits the UL pilot signal to the base station 2 (step S24). .

When receiving the UL pilot signal (step S25), the report receiving unit 52 in the base station 2 has the normal power of the first measurement target signal D1 and the zero power of the first measurement target signal D5 from the UL pilot signal. DL side amplitude phase and DL side SIR are extracted (step S26). The report receiving unit 52 stores the DL side amplitude phase and the DL side SIR at the time of normal power and zero power in the first storage unit 41 (step S27). Further, the report request unit 51 in the base station 2 generates control information including a UL amplitude request (step S28), stores the control information in the control signal (step S29), and transmits the control signal to the mobile station 3. (Step S30). The UL amplitude request is information for setting the transmission power of the second measurement target signal U1 to normal power and the transmission power of the second measurement target signal U5 to zero power among a plurality of groups in the UL pilot signal. .

In FIG. 9, when the second power control unit 93B in the mobile station 3 receives a control signal including a UL amplitude request from the base station 2 (step S31), the second power control unit 93B extracts the UL amplitude request from the control signal (step S32). . The second power control unit 93B sets normal power to the transmission power of the second measurement target signal U1 of the UL pilot signal and zero power to the transmission power of the second measurement target signal U5 (step S33). Then, the second power control unit 93B in the mobile station 3 transmits the UL pilot signal after setting the transmission power in step S33 to the base station 2 (step S34).

When the first phase measurement unit 24B in the base station 2 receives the UL pilot signal (step S35), the first measurement unit 24B at the normal power of the second measurement target signal U1 and the second measurement target signal U5 from the UL pilot signal. The UL side amplitude phase at zero power is measured (step S36). The first phase measurement unit 24B measures the UL side amplitude phase at the time of normal power of the second measurement target signal U1 in the UL pilot signal and the UL side amplitude phase at the time of zero power of the second measurement target signal U5. . Further, the first SIR measurement unit 24A in the base station 2 measures the UL side SIR at the normal power of the second measurement target signal U1 and the zero power of the second measurement target signal U5 from the UL pilot signal. (Step S37). The first SIR measurement unit 24A measures the UL side SIR at the normal power of the second measurement target signal U1 in the UL pilot signal and the UL side SIR at the zero power of the second measurement target signal U5. The report receiving unit 52 in the base station 2 stores the UL side amplitude phase and the UL side SIR in the first storage unit 41 (step S38).

The first calculation unit 54A in the base station 2 compares the UL side SIR at the normal power and the UL side SIR at the zero power to calculate the UL side interference power (step S39). The second calculation unit 54B in the base station 2 compares the UL side amplitude phase during normal power and the UL side amplitude phase during zero power to calculate the UL side phase change amount (step S40). Further, the first calculation unit 54A in the base station 2 compares the DL side SIR at the normal power and the DL side SIR at the zero power to calculate the DL side interference power (step S41). The second calculation unit 54B in the base station 2 compares the DL side amplitude phase at the time of normal power and the DL side amplitude phase at the time of zero power to calculate the DL side phase change amount (step S42).

The first calculation unit 54A in the base station 2 calculates the adjustment SIR obtained from the comparison result between the UL side interference power and the DL side interference power (step S43). The second calculation unit 54B in the base station 2 calculates the adjustment phase change amount based on the difference between the UL side phase change amount and the DL side phase change amount (step S44). The first calculation unit 54A in the base station 2 sets the MCS value corresponding to the adjustment SIR (step S45). Further, the first adjustment unit 54C in the base station 2 adjusts the block size of the DL data signal based on the set MCS value (step S46). Further, the second adjustment unit 54D in the base station 2 corrects the phase of the RF circuit (not shown) in the base station 2 based on the adjustment phase change amount (step S47), and ends the processing operation shown in FIG. To do.

The base station 2 requests the mobile station 3 to measure the DL pilot signal in which the transmission power of the first measurement target signal D1 is set to normal power and the transmission power of the first measurement target signal D5 is set to zero power. The base station 2 transmits to the mobile station 3 a DL pilot signal in which the transmission power of the first measurement target signal D1 is set to normal power and the transmission power of the first measurement target signal D5 is set to zero power. The mobile station 3 measures the SIR and the amplitude phase of the first measurement target signal D1 in the DL pilot signal at the normal power, and the SIR at the zero power of the first measurement target signal D5 in the DL pilot signal. The amplitude phase is measured, and the measurement result is reported to the base station 2. Further, the base station 2 requests the mobile station 3 to transmit a UL pilot signal in which the transmission power of the second measurement target signal U1 is set to normal power and the transmission power of the second measurement target signal U5 is set to zero power. The mobile station 3 transmits to the base station 2 a UL pilot signal in which the transmission power of the second measurement target signal U1 is set to normal power and the transmission power of the second measurement target signal U5 is set to zero power. The base station 2 measures the SIR and amplitude phase of the second measurement target signal U1 of the UL pilot signal at the normal power, and measures the SIR and amplitude phase of the second measurement target signal U5 at the time of zero power.

The base station 2 calculates the UL side interference power from the UL side SIR at the normal power and the UL side SIR at the zero power. Further, the base station 2 calculates the DL side interference power from the DL side SIR at the normal power and the DL side SIR at the zero power. Furthermore, the base station 2 calculates an adjustment SIR using the UL side interference power and the DL side interference power, acquires an MCS value corresponding to the adjustment SIR, and sets the block size of the DL data signal based on the acquired MCS value. adjust. As a result, by controlling the transmission output of the DL signal reflecting the UL side SIR and the DL side SIR, it is possible to ensure communication characteristics suitable for the actual radio quality.

The base station 2 calculates the UL phase change amount based on the amplitude phase of the UL pilot signal at normal power and the amplitude phase at zero power. Furthermore, the base station 2 calculates the DL side phase change amount based on the amplitude phase of the DL pilot signal during normal power and the amplitude phase at zero power. Further, the base station 2 calculates an adjustment phase change amount from the UL side phase change amount and the DL side phase change amount, and adjusts the phase of the RF circuit based on the adjustment phase change amount. As a result, by controlling the transmission output of the DL signal reflecting the phase change amount on the UL side and the phase change amount on the DL side, it is possible to ensure communication characteristics suitable for the actual radio quality.

In the base station 2 of the first embodiment, DL pilot signals of at least two groups of DL pilot signals D1 and D5 are designated as the first measurement target signal. However, the number may be three or more and can be changed as appropriate. . Further, for example, one group of pilot signals may be designated as the first measurement target signal, and an embodiment in that case will be described below as Example 2. In addition, the same code | symbol is attached | subjected to the structure same as Example 1, and the description of the overlapping structure and operation | movement is abbreviate | omitted.

The base station 2 designates the DL pilot signal D1 as the first measurement target signal, and measures the SIR and amplitude phase at the normal power of the first measurement target signal D1 and reports the measurement result to the mobile station 3. Request. The mobile station 3 measures the DL side SIR and DL side amplitude phase of the first measurement target signal D1 at the normal power, and transmits the measurement result to the base station 2. Then, the base station 2 stores the DL side SIR and the DL side amplitude phase at the normal power of the first measurement target signal D1 in the first storage unit 41. Furthermore, the base station 2 requests the mobile station 3 to measure the SIR and amplitude phase of the first measurement target signal D1 at zero power and report the measurement result. The mobile station 3 measures the DL-side SIR and the DL-side amplitude phase at the time of zero power of the first measurement target signal D1, and transmits the measurement result to the base station 2. Then, the base station 2 stores the measurement result of the DL side SIR and the DL side amplitude phase at the time of zero power of the first measurement target signal D1 in the first storage unit 41.

The base station 2 receives the SIR and amplitude phase at the normal power and zero power of the first measurement target signal D1 from the mobile station 3, and then uses the UL pilot signal U1 at the normal power as the second measurement target signal. Request the mobile station 3 for transmission. The mobile station 3 transmits the second measurement target signal U1 to the base station 2 with normal power. The base station 2 measures the UL side SIR and the UL side amplitude phase of the second measurement target signal U1 at the normal power, and stores the measurement result in the first storage unit 41. Furthermore, the base station 2 requests the mobile station 3 to transmit the UL pilot signal U1 at zero power as the second measurement target signal. The mobile station 3 transmits the second measurement target signal U1 to the base station 2 with zero power. The base station 2 measures the UL side SIR and the UL side amplitude phase of the second measurement target signal U1 at zero power, and stores the measurement result in the first storage unit 41.

The first calculation unit 54A in the first control unit 54 of the base station 2 compares the DL side SIR at the normal power and the DL side SIR at the zero power of the first measurement target signal D1 to compare the DL side SIR. Interference power is calculated. Furthermore, the first calculation unit 54A calculates the UL side interference power by comparing the UL side SIR at the normal power and the UL side SIR at the zero power of the second measurement target signal U1. The first calculation unit 54A calculates the adjusted SIR by comparing the DL side interference power and the UL side interference power. Further, the first calculation unit 54A acquires an MCS value corresponding to the adjustment SIR.

The second calculation unit 54B in the first control unit 54 compares the DL side amplitude phase at the normal power and the DL side amplitude phase at the zero power of the first measurement target signal D1 to change the DL side phase. Calculate the amount. Further, the second calculation unit 54B compares the UL side amplitude phase at the normal power of the second measurement target signal U1 with the UL side amplitude phase at the zero power to calculate the UL side phase change amount. The second calculation unit 54B calculates the adjustment phase change amount by comparing the DL side phase change amount and the UL side phase change amount.

10 to 13 are sequence diagrams illustrating an example of processing operations of the base station 2 and the mobile station 3 related to the transmission output control process of the second embodiment. In FIG. 10, the report request unit 51 in the base station 2 generates control information for the mobile station 3 (step S51). The position information of the first measurement target signal in the control information is information for identifying the frequency position of any one DL pilot signal, for example, the DL pilot signal D1, out of the plurality of DL pilot signals. The report request unit 51 in the base station 2 stores the control information in the control signal (step S52) and transmits the control signal to the mobile station 3 (step S53). When receiving the control signal from the base station 2 (Step S54), the second control unit 93C in the mobile station 3 extracts the control information from the control signal (Step S55), and sets the terminal in the extracted control information. Information is set (step S56).

Moreover, after transmitting the control signal in step S53, the power control unit 53 in the base station 2 specifies, for example, the first measurement target signal D1, and the normal power is set as the transmission power of the first measurement target signal D1. Is set (step S57). The power control unit 53 transmits the DL pilot signal to the mobile station 3 after setting the transmission power in step S57 (step S58). When receiving the DL pilot signal (step S59), the second phase measuring unit 76B in the mobile station 3 measures the DL side amplitude phase at the normal power of the first measurement target signal D1 (step S60). The second phase measurement unit 76B measures the amplitude phase of the first measurement target signal D1 in the DL pilot signal as the DL side amplitude phase at the time of normal power.

Furthermore, the second SIR measurement unit 76A in the mobile station 3 measures the DL-side SIR at the normal power of the first measurement target signal D1 (step S61). The second SIR measurement unit 76A measures the SIR of the first measurement target signal D1 in the DL pilot signal as the DL side SIR at the normal power. The reporting unit 93A in the mobile station 3 stores the DL side amplitude phase and the DL side SIR at the normal power of the first measurement target signal D1 in the second storage unit 81 (step S62). Then, the reporting unit 93A stores the DL side amplitude phase and DL side SIR at the normal power of the first measurement target signal D1 in the UL pilot signal (step S63), and transmits the UL pilot signal to the base station 2. (Step S64).

When receiving the UL pilot signal (step S65), the report receiving unit 52 in the base station 2 extracts the DL side amplitude phase and the DL side SIR at the normal power of the first measurement target signal D1 from the UL pilot signal. (Step S66). The report receiving unit 52 stores the DL side amplitude phase and the DL side SIR in the first storage unit 41 (step S67). Further, the report request unit 51 in the base station 2 generates control information including a measurement request for requesting measurement of the wireless quality at the time of zero power of the first measurement target signal (step S68), and controls in the control signal. Information is stored (step S69), and a control signal is transmitted to the mobile station 3 (step S70).

When receiving the control signal (step S71), the mobile station 3 extracts the control information from the control signal (step S72), sets the terminal setting information in the extracted control information (step S73), and is shown in FIG. The processing operation is terminated.

In FIG. 11, after transmitting the control signal in step S70, the power control unit 53 in the base station 2 sets zero power to the transmission power of the first measurement target signal (step S81). The power control unit 53 in the base station 2 transmits a DL pilot signal to the mobile station 3 after setting the transmission power in step S81 (step S82). When receiving the DL pilot signal (step S83), the second phase measuring unit 76B in the mobile station 3 measures the DL side amplitude phase at zero power of the first measurement target signal D1 (step S84). The second phase measurement unit 76B measures the amplitude phase of the first measurement target signal D1 in the DL pilot signal as the DL side amplitude phase at zero power.

Further, the second SIR measurement unit 76A in the mobile station 3 measures the DL side SIR at the time of zero power of the first measurement target signal D1 (step S85). The second SIR measurement unit 76A measures the SIR of the first measurement target signal D1 in the DL pilot signal as the DL-side SIR at zero power. The second control unit 93C in the mobile station 3 stores the DL side amplitude phase and the DL side SIR at the time of zero power of the first measurement target signal D1 in the second storage unit 91 (step S86). Then, the reporting unit 93A in the mobile station 3 stores the DL side amplitude phase and the DL side SIR at the time of zero power of the first measurement target signal D1 in the UL pilot signal (step S87), and the UL pilot signal is transmitted to the base station. Transmit to the station 2 (step S88).

When receiving the UL pilot signal (step S89), the report receiving unit 52 in the base station 2 extracts the DL side amplitude phase and the DL side SIR at the time of zero power of the first measurement target signal D1 from the UL pilot signal. (Step S90). The report receiving unit 52 stores the DL side amplitude phase and the DL side SIR in the first storage unit 41 (step S91). Further, the report request unit 51 in the base station 2 generates control information including the UL amplitude request and the normal power setting of the second measurement target signal U1 (step S92), and stores the control information in the control signal ( In step S93, a control signal is transmitted to the mobile station 3 (step S94). The UL amplitude request is information for requesting the radio quality during normal power of the second measurement target signal U1 of the UL pilot signal.

In FIG. 12, when the second power control unit 93B in the mobile station 3 receives a control signal including a UL amplitude request from the base station 2 (step S101), the control information is extracted from the control signal (step S102). Terminal setting information in the extracted control information is set (step S103). The second power control unit 93B in the mobile station 3 extracts the UL amplitude request in the control information (step S104), and based on the extracted UL amplitude request, the transmission power of the second measurement target signal of the UL pilot signal The normal power is set to (step S105). Then, the second power control unit 93B transmits the UL pilot signal after setting the transmission power in step S105 to the base station 2 (step S106).

When the first phase measurement unit 24B in the base station 2 receives the UL pilot signal (step S107), the first phase measurement unit 24B measures the UL side amplitude phase of the second measurement target signal U1 at the normal power from the UL pilot signal ( Step S108). The first phase measurement unit 24B measures the UL side amplitude phase of the second measurement target signal U1 as the UL side phase amplitude phase during normal power. Further, the first SIR measurement unit 24A in the base station 2 measures the UL side SIR at the normal power of the second measurement target signal U1 from the UL pilot signal (step S109). The first SIR measurement unit 24A measures the UL side SIR of the second measurement target signal U1 as the UL side SIR during normal power. The first control unit 54 in the base station 2 stores the UL side amplitude phase and the UL side SIR in the first storage unit 41 (step S110). Further, the report request unit 51 in the base station 2 generates control information including the UL amplitude request and zero power setting of the second measurement target signal U1 (step S111), and stores the control information in the control signal ( In step S112, a control signal is transmitted to the mobile station 3 (step S113).

In FIG. 13, when the second power control unit 93B in the mobile station 3 receives a control signal from the base station 2 (step S121), the second power control unit 93B extracts control information from the control signal (step S122). Terminal setting information is set (step S123). The second power control unit 93B in the mobile station 3 extracts the UL amplitude request in the control information (step S124), and based on the extracted UL amplitude request, the transmission power of the second measurement target signal of the UL pilot signal. Is set to zero power (step S125). Then, the second power control unit 93B in the mobile station 3 transmits the UL pilot signal after setting the transmission power in step S125 to the base station 2 (step S126).

When receiving the UL pilot signal (step S127), the first phase measurement unit 24B in the base station 2 measures the UL side amplitude phase of the second measurement target signal U1 at zero power from the UL pilot signal ( Step S128). The first phase measurement unit 24B measures the UL side amplitude phase of the second measurement target signal U1 as the UL side phase amplitude phase at zero power. Further, the first SIR measurement unit 24A in the base station 2 measures the UL side SIR at the time of zero power of the second measurement target signal U1 from the UL pilot signal (step S129). The first SIR measurement unit 24A measures the UL side SIR of the second measurement target signal U1 as the UL side SIR at zero power. The first control unit 54 in the base station 2 stores the UL side amplitude phase and the UL side SIR in the first storage unit 41 (step S130).

The first calculation unit 54A in the base station 2 compares the UL side SIR at the normal power and the UL side SIR at the zero power of the second measurement target signal U1 to calculate the UL side interference power (step). S131). The second calculation unit 54B in the base station 2 calculates the UL-side phase change amount by comparing the UL-side amplitude phase at the normal power and the UL-side amplitude phase at the zero power of the second measurement target signal U1. (Step S132). Further, the first calculation unit 54A in the base station 2 calculates the DL side interference power by comparing the DL side SIR at the normal power and the DL side SIR at the zero power of the first measurement target signal D1. (Step S133). The second calculation unit 54B in the base station 2 calculates the DL side phase change amount by comparing the DL side amplitude phase at the normal power and the DL side amplitude phase at the zero power of the first measurement target signal D1. (Step S134).

The first calculation unit 54A in the base station 2 calculates the adjustment SIR obtained from the comparison result between the UL side interference power and the DL side interference power (step S135). The second calculation unit 54B in the base station 2 calculates the adjustment phase change amount based on the difference between the UL side phase change amount and the DL side phase change amount (step S136). The first calculation unit 54A in the base station 2 sets the MCS value corresponding to the adjustment SIR (step S137). The first adjustment unit 54C in the base station 2 adjusts the block size of the DL data signal based on the set MCS value (step S138). Furthermore, the second adjustment unit 54D in the base station 2 corrects the phase of the RF circuit (not shown) in the base station 2 based on the adjustment phase change amount (step S139), and ends the processing operation shown in FIG. To do.

The base station 2 transmits to the mobile station 3 a DL pilot signal in which the transmission power of the first measurement target signal D1 is set to normal power. The mobile station 3 measures the SIR and the amplitude phase at the normal power of the first measurement target signal D1, and reports the measurement result to the base station 2. Furthermore, the base station 2 transmits a DL pilot signal in which the transmission power of the first measurement target signal D1 is set to zero power to the mobile station 3. The mobile station 3 measures the SIR and amplitude phase of the first measurement target signal D1 at zero power, and reports the measurement result to the base station 2. Furthermore, the mobile station 3 transmits to the base station 2 a UL pilot signal in which the transmission power of the second measurement target signal U1 is set to normal power. The base station 2 measures the SIR and amplitude phase of the second measurement target signal U1 during normal power. Further, the mobile station 3 transmits to the base station 2 a UL pilot signal in which the transmission power of the second measurement target signal U1 is set to zero power. The base station 2 measures the SIR and amplitude phase at zero power of the second measurement target signal U1.

The base station 2 calculates the interference power on the UL side from the SIR at the normal power and the SIR at the zero power of the second measurement target signal U1. Further, the base station 2 calculates the DL side interference power from the SIR at the normal power and the SIR at the zero power of the first measurement target signal D1. Further, the base station 2 calculates an adjustment SIR with the interference power on the UL side and the interference power on the DL side, acquires an MCS value corresponding to the adjustment SIR, and blocks the DL data signal based on the acquired MCS value. Adjust the size. As a result, by controlling the transmission output of the DL signal reflecting the UL side SIR and the DL side SIR, it is possible to ensure communication characteristics suitable for the actual radio quality. Moreover, since the SIRs of the DL pilot signal and the UL pilot signal at the same frequency at normal power and zero power are compared, communication quality suitable for the actual radio quality compared to the first embodiment with high accuracy. Can be secured.

The base station 2 calculates the UL-side phase change amount from the amplitude phase at the normal power and the amplitude phase at the zero power of the second measurement target signal U1. Furthermore, the base station 2 calculates the phase change amount on the DL side based on the amplitude phase during normal power and the amplitude phase during zero power of the first measurement target signal D1. Further, the base station 2 calculates an adjustment phase change amount from the UL side phase change amount and the DL side phase change amount, and adjusts the phase of the RF circuit based on the adjustment phase change amount. As a result, by controlling the transmission output of the DL signal reflecting the phase change amount on the UL side and the phase change amount on the DL side, it is possible to ensure communication characteristics suitable for the actual radio quality. In addition, since the amplitude phases of the DL pilot signal and the UL pilot signal at the same frequency at normal power and zero power are compared, communication suitable for actual radio quality compared to the first embodiment with high accuracy. Quality can be ensured.

In the base station 2 of the second embodiment, the DL pilot signal D1 is designated as the first measurement target signal, and the UL pilot signal U1 is designated as the second measurement target signal. However, for example, the DL pilot signal D3 may be designated as the first measurement target signal, and the UL pilot signal U3 may be designated as the second measurement target signal, and can be changed as appropriate.

Also, the DL pilot signal D1 may be designated as the first measurement target signal, and the UL pilot signal D3 may be designated as the second measurement target signal, and can be changed as appropriate.

The base station 2 measures the SIR and amplitude phase at zero power after measuring the SIR and amplitude phase at the normal power of the first measurement target signal D1. However, after measuring the SIR and amplitude phase at zero power of the first measurement target signal D1, the SIR and amplitude phase at normal power may be measured and can be changed as appropriate.

In this embodiment, the base station 2 recognizes the pure interference signal of the UL signal and the pure interference signal of the DL signal, and calculates an accurate SIR in a state not affected by the interference signal on the base station 2 side. it can. As a result, an MCS value reflecting the actual DL radio quality is acquired, and DL communication characteristics reflecting the actual radio quality can be secured based on the MCS value.

The base station 2 of the present embodiment uses the DL side SIR and DL side amplitude phases of the first measurement target signal of the DL pilot signal and the normal phase of the second measurement target signal of the UL pilot signal. The UL side SIR and the UL side amplitude phase at the time of power and zero power are acquired. The base station 2 then transmits the DL signal transmission output based on the DL side SIR and DL side amplitude phase during normal power and zero power, and the UL side SIR and UL side amplitude phase during normal power and zero power. Controlled. However, the base station 2 may control the transmission output of the DL signal based on the DL side SIR and the DL side amplitude phase at the time of normal power and zero power without measuring the UL side SIR and the UL side amplitude phase. . In this case, it is possible to ensure DL communication characteristics reflecting the actual radio quality on the DL side.

Also, the base station 2 does not acquire the DL side SIR and DL side amplitude phase at normal power and zero power of the DL pilot signal, and measures the UL side SIR and UL side amplitude phase at normal power and zero power. Then, the transmission output of the DL signal may be controlled based on the measurement result. In this case, DL communication characteristics reflecting the actual radio quality on the UL side can be ensured.

Moreover, although the base station 2 of the present embodiment has been described as an integrated device having a wireless function and a control function, the present invention is not limited to this, and the base station 2 is configured by separately setting the wireless device and the control device. You may do it. In this case, the wireless device includes an antenna and an RF circuit, and the control device includes a memory and a processor.

FIG. 14 is a diagram illustrating an example of hardware of the communication device 100 that implements the base station 2. The communication device 100 illustrated in FIG. 14 includes, for example, an antenna 101, a wireless circuit 102, a communication interface circuit 103, a memory 104, and a processor 105. The radio circuit 102 performs predetermined processing such as modulation on the signal output from the processor 105, and transmits the processed signal via the antenna 101. The radio circuit 102 performs predetermined processing such as demodulation on the signal received via the antenna 101 and outputs the result to the processor 105. The radio circuit 102 implements the functions of the receiving unit 12 and the transmitting unit 13, for example. The communication interface circuit 103 is an interface for connecting to the core network or another base station 2 by wired connection.

The memory 104 includes a first reception unit 21, a reception multiple access processing unit 22, a first demodulation unit 23, a line quality extraction unit 24, a first SIR measurement unit 24 </ b> A, and a first phase measurement unit. A program for realizing the functions of 24B and the transmission power extraction unit 25 is stored. The memory 104 includes a first transmission power control unit 31, a first modulation unit 32, a transmission multiple access processing unit 33, a first transmission unit 34, a broadcast information generation unit 35, and a first pilot generation of the transmission unit 13. A program for realizing the functions of the unit 36 and the first control information generation unit 37 is stored. Further, the memory 104 stores programs for realizing the functions of the first line control unit 42, the report request unit 51, the report reception unit 52, the power control unit 53, and the first control unit 54 of the control unit 14. Has been.

The processor 105 reads out the program stored in the memory 104 from the memory 104 and executes the program, whereby the first receiving unit 21, the reception multiple access processing unit 22, the first demodulating unit 23, and the line quality extraction of the receiving unit 12 The function of the unit 24 is realized. Furthermore, the processor 105 implements the functions of the first SIR measurement unit 24A, the first phase measurement unit 24B, and the transmission power extraction unit 25 of the reception unit 12 by executing a program. The processor 105 reads out the program stored in the memory 104 from the memory 104 and executes it, whereby the first transmission power control unit 31, the first modulation unit 32, the transmission multiple access processing unit 33 and the first transmission unit 13 of the transmission unit 13. 1 function of the transmission unit 34 is realized. Furthermore, the processor 105 implement | achieves the function of the alerting | reporting information generation part 35 of the transmission part 13, the 1st pilot generation part 36, and the 1st control information generation part 37 by running a program. The processor 105 reads out the program stored in the memory 104 from the memory 104 and executes it, whereby the first line control unit 42, the report requesting unit 51, the report receiving unit 52, the power control unit 53, and the first control unit 14 of the control unit 14 are executed. 1 function of the control unit 54 is realized.

FIG. 15 is a diagram illustrating an example of hardware of the communication device 200 that implements the mobile station 3. A communication apparatus 200 illustrated in FIG. 15 includes an antenna 201, a wireless circuit 202, a memory 203, and a processor 204. The radio circuit 202 performs predetermined processing such as modulation on the signal output from the processor 204, and transmits the processed signal via the antenna 201. The radio circuit 202 performs predetermined processing such as demodulation on the signal received via the antenna 201 and outputs the result to the processor 204. The radio circuit 202 realizes the functions of the terminal-side receiving unit 62 and the terminal-side transmitting unit 63, for example.

The memory 203 includes a second receiving unit 71, a reception orthogonal multiple access processing unit 72, a second demodulating unit 73, a system information extracting unit 74, a control information extracting unit 75, and a second line quality of the terminal side receiving unit 62. A program for realizing the function of the extraction unit 76 is stored. Further, the memory 203 stores a program for realizing the functions of the second SIR measurement unit 76A and the second phase measurement unit 76B of the terminal side reception unit 62. The memory 203 includes a second transmission power control unit 81, a second modulation unit 82, a transmission orthogonal multiple access processing unit 83, a second transmission unit 84, and a second control information extraction unit 85 of the terminal side transmission unit 63. A program for realizing the function of the second pilot generation unit 86 is stored. The memory 203 has a program for realizing the functions of the terminal control unit 92, the second line control unit 93, the report unit 93A, the second power control unit 93B, and the second control unit 93C of the terminal side control unit 64. Is stored.

The processor 204 reads out the program stored in the memory 203 from the memory 203 and executes it, whereby the second receiver 71, the reception orthogonal multiple access processor 72, the second demodulator 73, and the terminal-side receiver 62, The function of the system information extraction unit 74 is realized. Furthermore, the processor 204 executes the program, so that the control information extracting unit 75, the second line quality extracting unit 76, the second SIR measuring unit 76A, and the second phase measuring unit 76B of the terminal side receiving unit 62 are executed. Realize the function. The processor 204 reads out the program stored in the memory 203 from the memory 203 and executes the program, whereby the second transmission power control unit 81, the second modulation unit 82, and the transmission orthogonal multiple access processing unit of the terminal-side transmission unit 63 83 functions are realized. Furthermore, the processor 204 implements the functions of the second transmission unit 84, the second control information extraction unit 85, and the second pilot generation unit 86 of the terminal-side transmission unit 63 by executing the program. The processor 204 reads out the program stored in the memory 203 from the memory 203 and executes it, whereby the terminal control unit 92, the second line control unit 93, the reporting unit 93A, and the second power control of the terminal-side control unit 64 are executed. The functions of the unit 93B and the second control unit 93C are realized.

In addition, each component of each part illustrated does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each part is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured.

Furthermore, the various processing functions performed by each device are all or any part of it on a CPU (Central Processing Unit) (or a micro computer such as MPU (Micro Processing Unit) or MCU (Micro Controller Unit)). You may make it perform. Various processing functions may be executed entirely or arbitrarily on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. Needless to say.

DESCRIPTION OF SYMBOLS 1 Radio | wireless communications system 2 Base station 3 Mobile station 42 1st line control part 51 Report request | requirement part 52 Report receiving part 53 Power control part 54 1st control part 54A 1st calculation part 54B 2nd calculation part 54C 1st Adjustment unit 54D second adjustment unit 93 second line control unit 93A reporting unit 93B second power control unit 93C second control unit

Claims

A plurality of first pilot signals are transmitted to other communication devices using a plurality of frequencies in a radio signal, and a plurality of second pilot signals are transmitted from the other communication devices using the plurality of frequencies. A communication device for receiving,
A requesting unit that requests the other communication device to measure the radio quality before and after the output control of the designated first measurement target signal among the plurality of first pilot signals;
A transmission unit configured to control the output of the first measurement target signal and to transmit the first pilot signal including the first measurement target signal to the other communication device;
And a receiving unit that receives the wireless quality of the first measurement target signal measured by the other communication device.
Among the plurality of second pilot signals, output of a designated second measurement target signal can be controlled, and transmission of the second pilot signal including the second measurement target signal is transmitted to the other communication device. A first requesting unit that requests
A measurement unit for measuring radio quality of the second measurement target signal in the second pilot signal from the other communication device;
Based on the radio quality of the first measurement target signal received from the other communication apparatus and the radio quality of the second measurement target signal measured by the measurement unit, the radio for the other communication apparatus The communication apparatus according to claim 1, further comprising: a control unit that controls transmission of the signal.
A control unit configured to control transmission of the radio signal to the other communication device based on radio quality before output control of the first measurement target signal and radio quality after output control of the first measurement target signal; The communication device according to claim 1, wherein the communication device is provided.
Radio quality before output control of one first pilot signal in the first measurement target signal and radio quality after output control of the other first pilot signal in the first measurement target signal The communication device according to claim 1, further comprising a control unit that controls transmission of the wireless signal to the other communication device.
The communication apparatus according to claim 1 or 2, wherein the first pilot signal and the second pilot signal are time division multiplexing radio signals using the same frequency band.
The communication apparatus according to claim 2, wherein the frequency of the first measurement target signal and the frequency of the second measurement target signal are the same frequency.
The transmitter is
The communication apparatus according to claim 1, wherein the transmission power of the first measurement target signal can be set to zero power.
The request unit includes:
The communication apparatus according to claim 1 or 2, wherein the first measurement target signal is notified to the other communication apparatus by identification information that is identified for each of the first pilot signals.
A plurality of first pilot signals are transmitted to other communication devices using a plurality of frequencies in a radio signal, and a plurality of second pilot signals are transmitted from the other communication devices using the plurality of frequencies. A communication device for receiving,
A requesting unit that makes it possible to control output of a designated measurement target signal from among the plurality of second pilot signals, and requests the other communication device to transmit the second pilot signal including the measurement target signal; ,
A measurement unit for measuring radio quality of the measurement target signal in the second pilot signal from the other communication device;
And a control unit that controls transmission of the radio signal to the other communication device based on the radio quality of the measurement target signal measured by the measurement unit.
A plurality of first pilot signals are transmitted to other communication devices using a plurality of frequencies in a radio signal, and a plurality of second pilot signals are transmitted from the other communication devices using the plurality of frequencies. A transmission control method executed by a receiving communication device,
The communication device
Requesting the other communication device to measure the radio quality before and after the output control of the designated measurement target signal among the plurality of first pilot signals,
Receiving the radio quality of the signal to be measured measured by the other communication apparatus, and executing processing for controlling transmission of the radio signal to the other communication apparatus based on the radio quality Transmission control method.
A plurality of first pilot signals are received from other communication devices using a plurality of frequencies in a radio signal, and a plurality of second pilot signals are received from the other communication devices using the plurality of frequencies. A communication device for transmitting,
The first measurement target signal received from the other communication device when receiving a wireless quality measurement request before and after output control of the designated first measurement target signal among the plurality of first pilot signals. A measurement unit for measuring the wireless quality of
And a transmitter that transmits the radio quality of the first measurement target signal measured by the measurement unit to the other communication device using the second pilot signal.
The transmitter is
Among the plurality of second pilot signals, the output of the designated second measurement target signal can be controlled, and the transmission request for the second pilot signal including the second measurement target signal is set to the other communication. The communication device according to claim 11, wherein when receiving from the device, the second pilot signal in which an output of the second measurement target signal is controlled is transmitted.
The first communication device includes a first communication device and a second communication device. The first communication device transmits a plurality of first pilot signals using a plurality of frequencies in a radio signal, and the second communication. A wireless communication system for receiving a plurality of second pilot signals from a device using the plurality of frequencies,
The first communication device is:
A request unit that generates control information for requesting the second communication device to measure the reception quality of the designated first measurement target signal among the plurality of first pilot signals;
A first transmitter that transmits the first pilot signal including the first measurement target signal and the control information to the second communication device;
The second communication device is:
A measurement unit that measures reception quality of the first measurement target signal in the first pilot signal received from the first communication device according to the control information received from the first communication device;
It has information which shows reception quality of the 1st measurement object signal measured by the measurement part, and the 2nd transmission part which transmits the 2nd pilot signal to the 1st communication device, Wireless communication system.