A communication method includes acquiring information relating to a first wireless terminal and a second wireless terminal, deciding priority of data based on information relating to the first wireless terminal and the second wireless terminal, generating a packet including the data regarding which the priority has been decided, acquiring channel-used time, calculating channel-usable time based on the channel-used time, calculating a first channel usage estimated time, calculating a wireless transmission rate to be applied when the wireless base station transmits the packet to the first wireless terminal and the second wireless terminal, based on the priority of the data included in the packet, to where the first channel usage estimated time is within the channel-usable time, and transmitting the packet, and information indicating the wireless transmission rate, to the wireless base station.