Communication device, communication method, and program

1. A communication device, comprising:

receiving circuitry configured to receive a frame;

transmitting circuitry; and

processing circuitry configured to:

determine whether or not the received frame is a signal transmitted from another terminal belonging to another network different from a network to which the communication device belongs on a basis of BSS Color information included in the received frame;

acquire length information related to the frame from the received frame;

decide a length of a transmission frame on a basis of the acquired length information;

determine a reception power of the signal transmitted from the other terminal belonging to the other network;

control transmission power of the transmission frame in accordance with the determined reception power such that:

the transmission power of the transmission frame is decreased in a case in which the determined reception power is above a threshold value, or

the transmission power of the transmission frame is increased in a case in which the determined reception power is below the threshold value; and

transmit the transmission frame in accordance with the controlled transmission power.

2. The communication device according to claim 1 , wherein the processing circuitry acquires the length information related to the frame on a basis of information related to a data rate and information related to a frame length included in the received frame.

3. The communication device according to claim 1 , wherein the processing circuitry decides the length of the transmission frame so that transmission of the transmission frame is completed at least before reception of the received frame is completed.

4. The communication device according to claim 1 , wherein the processing circuitry decides the length of the transmission frame on a basis of information related to a channel use period included in the received frame or information related to a frame sequence of the transmission frame.

5. The communication device according to claim 4 , wherein the information related to the frame sequence of the transmission frame is information related to an acknowledgment received from an access point after transmission of the transmission frame is completed.

6. The communication device according to claim 1 , wherein the processing circuitry decides a transmission timing of a second transmission frame transmitted following the transmission frame on a basis of information related to a frame sequence of the received frame.

7. The communication device according to claim 6 , wherein the information related to the frame sequence of the received frame is information related to an acknowledgment received from an access point by the other terminal after transmission of a transmission frame transmitted by the other terminal is completed.

8. The communication device according to claim 7 ,

wherein the processing circuitry controls the transmitting circuitry to transmit a transmission frame which is transmitted following the transmission frame at least after the other terminal receives an acknowledgment from the access point.

9. The communication device according to claim 1 , wherein the processing circuitry determines reception power of a signal transmitted from the other terminal belonging to the other network, and

the processing circuitry determines that a medium is in an idle state in a case in which the signal determining unit determines that the received frame is the signal transmitted from the other terminal belonging to the other network, and reception power of the signal transmitted from the other terminal belonging to the other network is equal to or lower than the threshold value.

10. A communication method by a communication device including a transceiver and a processor, the method comprising:

receiving, by the processor, a frame;

determine whether or not the received frame is a signal transmitted from another terminal belonging to another network different from a network to which the communication device belongs on a basis of BSS Color information included in the received frame;

acquiring, by the processor, length information related to the frame from the received frame;

deciding, by the processor, a length of a transmission frame on a basis of the acquired length information;

determining a reception power of the signal transmitted from the other terminal belonging to the other network;

controlling transmission power of the transmission frame in accordance with the determined reception power such that:

the transmission power of the transmission frame is decreased in a case in which the determined reception power is above a threshold value, or

the transmission power of the transmission frame is increased in a case in which the determined reception power is below the threshold value; and

transmitting the transmission frame in accordance with the controlled transmission power.

11. A non-transitory computer readable program product containing a program that causes a processor to:

receive a frame;

determine whether or not the received frame is a signal transmitted from another terminal belonging to another network different from a network to which the communication device belongs on a basis of BSS Color information included in the received frame;

acquire length information related to the frame from the received frame;

decide a length of a transmission frame on a basis of the acquired length information;

determine a reception power of the signal transmitted from the other terminal belonging to the other network;

control transmission power of the transmission frame in accordance with the determined reception power such that:

the transmission power of the transmission frame is decreased in a case in which the determined reception power is above a threshold value, or

the transmission power of the transmission frame is increased in a case in which the determined reception power is below the threshold value; and

transmit the transmission frame in accordance with the controlled transmission power.