Communication device, wireless communication system, and resource selecting method

1. A communication device comprising:

processor circuitry configured to execute a process including:

measuring a reception signal intensity for each time unit and frequency unit constituting a resource; and

selecting a first resource such that the first resource that is used to transmit data by the communication device does not temporally overlap with a second resource that is used to transmit data by another communication device located in vicinity of the communication device based on the reception signal intensity measured at the measuring; and

a transmitter that transmits the data by using the first resource selected by the processor circuitry.

2. The communication device according to claim 1 , wherein

the processor circuitry executes a process including:

managing location information on a communication device in a range in which communication can be performed with the communication device; and

selecting, based on the location information, the first resource which is different from the second resource in time domain.

3. The communication device according to claim 2 , wherein

the selecting includes selecting the first resource which is different from the second resource in time domain, the second resource being used to transmit the data by another communication device located within a predetermined range from the communication device.

4. The communication device according to claim 1 , wherein

the processor circuitry executes a process including:

calculating, for each candidate resource that is a candidate for the first resource, an overall reception intensity that is in accordance with a reception signal intensity of the candidate resource and a reception signal intensity of a resource which is the same as the candidate resource in time domain and is different from the candidate resource in frequency domain; and

deciding that the candidate resource of which the overall reception intensity satisfies a predetermined criterion is the first resource.

5. The communication device according to claim 4 , wherein

the deciding includes deciding that the candidate resource having a smallest overall reception intensity is the first resource.

6. A wireless communication system comprising:

a first terminal device; and

a second terminal device that is located in vicinity of the first terminal device, wherein

the first terminal device includes

processor circuitry configured to execute a process including:

measuring a reception signal intensity for each time unit and frequency unit constituting a resource; and

selecting a first resource such that the first resource that is used to transmit data by the first terminal device does not temporally overlap with a second resource that is used to transmit data by the second terminal device based on the reception signal intensity measured at the measuring, and

a transmitter that transmits the data by using the first resource selected by the processor circuitry.

7. A resource selection method comprising:

measuring a reception signal intensity for each time unit and frequency unit constituting a resource;

selecting a first resource such that the first resource that is used to transmit data by a communication device does not temporally overlap with a second resource that is used to transmit data by another communication device located in vicinity of the communication device based on the reception signal intensity measured at the measuring, using processor circuitry; and

transmitting the data by using the selected first resource.