| 摘要 |
A receiver (3) receives first congestion degree information indicating a plurality of first congestion degrees, each indicating the degree of congestion in a corresponding one of a plurality of first wireless channels, and determines a plurality of second congestion degrees, each indicating the degree of congestion in a corresponding one of a plurality of second wireless channels. A generator (2) generates a message to be transmitted over any of the plurality of second wireless channels. A controller (4) transmits second congestion degree information indicating the plurality of second congestion degrees and selects, on the basis of the first congestion degree information, a wireless channel to be used to transmit the message among the plurality of second wireless channels. |
