Wireless communication system, communication apparatus and wireless communication method

A communication device including a first communicator and one or more second communicator disposed around the first communicator, and configured to perform communication with a relay device that moves,

• the second communicator comprising:
• a second receptor configured to attempt to receive a radio wave in a predetermined band and measures reception strength;
• and
• a second transmitter configured to transmit, to the first communicator, reception result information indicating a peripheral radio wave condition based on the reception strength measured by the second receptor;
• and
• the first communicator comprising:
• a first receptor configured to attempt to receive a radio wave in the predetermined band and measures reception strength;
• a determiner configured to determine a band to be used for transmission of data to the relay device on a basis of a peripheral radio wave condition based on the reception strength measured by the first receptor and the peripheral radio wave condition based on the reception result information transmitted from the second transmitter;
• and
• a first transmitter configured to transmit the data to the relay device using the band determined by the determiner.

A wireless communication method by a first communication device, one or more second communication devices disposed around the first communication device, and a relay device that moves, the wireless communication method comprising:

• by the second communication device, attempting to receive a radio wave in a predetermined band and measuring reception strength;
• by the second communication device, transmitting, to the first communication device, reception result information indicating a peripheral radio wave condition based on the reception strength measured;
• by the first communication device, attempting to receive a radio wave in the predetermined band and measuring reception strength;
• by the first communication device, determining a band to be used for transmission of data to the relay device on a basis of a peripheral radio wave condition based on the reception strength measured and the peripheral radio wave condition based on the reception result information transmitted;
• and
• by the first communication device, transmitting the data to the relay device using the band determined.

A wireless communication method by a communication device that includes a first communicator and one or more second communicator disposed around the first communicator, and performs communication with a relay device that moves, the wireless communication method comprising:

• by the second communicator, attempting to receive a radio wave in a predetermined band and measuring reception strength;
• by the second communicator, transmitting, to the first communicator, reception result information indicating a peripheral radio wave condition based on the reception strength measured;
• by the first communicator, attempting to receive a radio wave in the predetermined band and measuring reception strength;
• by the first communicator, determining a band to be used for transmission of data to the relay device on a basis of a peripheral radio wave condition based on the reception strength measured and the peripheral radio wave condition based on the reception result information transmitted;
• and
• by the first communicator, transmitting the data to the relay device using the band determined.