There is disclosed a communication method of a communication system having a base station for transmitting a beacon and a terminal for receiving the beacon transmitted from the base station and performing communication with the base station, the communication method including the steps of: transmitting the beacon by the base station, the beacon being made of a plurality of sub-beacons including an ID for identifying the terminal; and stopping processing for communication with the base station by the terminal when at least one of the plural sub-beacons has a portion that does not match an ID of the terminal.