Communication device
The present technology relates to a communication device capable of improving a system throughput. Provided is a communication device including a control unit that transmits a second signal including a transmission request for a first signal for measuring reception power or propagation loss to another communication device, receives the first signal transmitted from the other communication device, measures the reception power or the propagation loss on the basis of the received first signal, and controls transmission power on the basis of the measured reception power or propagation loss. The present technology can be applied to, for example, a wireless LAN system.
1. A communication device comprising:
a controller that performs control to
transmit a second signal including a transmission request for a first signal for measuring reception power or propagation loss to a second another communication device,
receive the first signal transmitted from a first another communication device,
measure the reception power or the propagation loss on a basis of the received first signal, and
control transmission power on a basis of the measured reception power or propagation loss.
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 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. The communication device according to claim 1 , wherein the first signal includes transmission power information and group identifier information that are the same as or correspond to information included in the second signal.
12. The communication device according to claim 1 , wherein the first signal includes information regarding an identifier of a terminal that induces transmission of a test signal and information regarding a resource used by the terminal.
13. The communication device according to claim 12 , wherein the information regarding the identifier of the terminal only identifies a terminal that can use a transmission power specified by the first signal and that can maintain a constant accuracy with respect to the transmission power.
14. The communication device according to claim 12 , wherein the information regarding a resource used by the terminal includes frequency resource information, wherein the frequency resource information indicates a part of a frequency band of a frequency channel, or indicates a center frequency and a frequency width.
15. The communication device according to claim 12 , wherein the first signal is transmitted using a format of a high efficiency trigger based physical layer convergence protocol (PLCP) protocol data unit defined by IEEE 802.11.
16. The communication device according to claim 12 , wherein the first signal is transmitted including group identifier information specified by the second signal.
17. 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.
18. The communication device according to claim 17 ,
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.
19. The communication device according to claim 17 ,
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.
20. 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.