A communication method includes generating a packet including the data regarding which the priority has been set beforehand, 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.