Communication device

1. A communication device comprising:

a controller that

transmits a second signal including a transmission request for a first signal for measuring reception power or propagation loss to a second another communication device,

receives the first signal transmitted from a first another communication device,

measures the reception power or the propagation loss on a basis of the received first signal, and

controls transmission power on a basis of the measured reception power or propagation loss,

wherein the second signal transmitted to the second another communication device is a basis for transmission of a third signal, including the transmission request for the first signal, transmitted to a first another communication device,

wherein the first signal received from the first another communication device is based on the third signal.

2. The communication device according to claim 1 ,

wherein the controller controls the transmission power on a basis of first reception power or first propagation loss measured from the first signal and second reception power or second propagation loss measured from desired communication.

3. The communication device according to claim 2 ,

wherein the controller performs control to minimize the transmission power before measuring the first reception power or the first propagation loss from the first signal.

4. The communication device according to claim 3 ,

wherein the controller performs control to increase the transmission power in a case where the first propagation loss is larger than the second propagation loss.

5. The communication device according to claim 1 ,

wherein the controller performs control to further exchange acceptable interference information regarding acceptable interference and threshold information regarding a threshold used in the control of the transmission power with the second another communication device.

6. The communication device according to claim 1 ,

wherein the second signal includes transmission power information regarding transmission power used by the second another communication device.

7. The communication device according to claim 1 ,

wherein the second signal includes group identifier information regarding an identifier of a group to which the second another communication device belongs.

8. The communication device according to claim 7 ,

wherein the second signal includes group resource information regarding a resource allocated for every group to which the second another communication device belongs.

9. The communication device according to claim 1 ,

wherein the controller

requests the second another communication device to change a connection destination of the first another communication device that has transmitted the first signal on a basis of a measurement result of the first signal, and

accommodates the first another communication device that has been requested to change the connection destination.

10. The communication device according to claim 1 ,

wherein the communication device is configured as a base station or its subordinate terminal,

transmits the second signal to the second another base station in a case of being configured as the base station, and

transmits the second signal to a connected base station in a case of being configured as the terminal.

11. A communication device comprising:

a controller that performs control to

receive a second signal transmitted from a third another communication device and including a transmission request for a first signal for measuring reception power or propagation loss, and

transmit a third signal including the transmission request for the first signal to a first another communication device on a basis of the received second signal.

12. The communication device according to claim 11 ,

wherein the controller performs control to exchange acceptable interference information regarding acceptable interference and threshold information regarding a threshold used in control of transmission power with the third another communication device.

13. The communication device according to claim 11 ,

wherein the third signal is a signal for transmitting the first signal in an OFDMA system to the first another communication device, and includes resource information regarding a resource used for transmission in the OFDMA system.

14. The communication device according to claim 11 ,

wherein the third signal includes information that is the same as or corresponds to at least a part of information included in the second signal, and

the same or corresponding information includes at least transmission power information regarding transmission power used when the first another communication device transmits the first signal or group identifier information regarding an identifier of a group to which the first another communication device belongs.

15. The communication device according to claim 11 ,

wherein the controller changes a connection destination of the first another communication device on a basis of a request to change the connection destination from the third another communication device.

16. The communication device according to claim 11 ,

wherein the communication device is configured as a base station,

receives the second signal transmitted from another base station as the third another communication device, and

transmits the third signal to a subordinate terminal as the first another communication device on a basis of the received second signal.

17. A communication device comprising:

a controller that performs control to

receive a third signal transmitted from a second another communication device and including a transmission request for a first signal for measuring reception power or propagation loss, and

transmit the first signal to a third another communication device on a basis of the received third signal.

18. The communication device according to claim 17 ,

wherein the controller transmits the first signal in a configuration having a plurality of different bandwidths according to an OFDMA system on a basis of information included in the third signal.

19. The communication device according to claim 17 ,

wherein the third signal includes transmission power information regarding transmission power, resource information regarding a resource, and group identifier information regarding an identifier of a group, and

the controller transmits the first signal including the group identifier information on a basis of the transmission power information and the resource information.

20. The communication device according to claim 17 ,

wherein the communication device is configured as a terminal,

receives the third signal transmitted from a connected base station as the second another communication device, and

transmits the first signal to another base station or a subordinate terminal of the another base station as the third another communication device on a basis of the received third signal.