Patent ID: 8558670

Claim:
An electric power communication device, comprising: a plurality of directional antennas, each of which has directionality; a plurality of electric power communication portions, each of which has directionality, is configured to transmit and receive electrical power, and is associated with a different one of or combination of the plurality of directional antennas; an electric power communication control portion configured to select one of the plurality of electric power communication portions to use for electric power communication with a partner communication device, based on which one of the plurality of directional antennas receives an incoming wireless signal transmitted from the partner communication device; a receiving detection portion that detects which one of the plurality of directional antennas receives the incoming wireless signal; an antenna control portion that sequentially switches among the plurality of directional antennas, wherein the receiving detection portion also detects, based on the contents of the incoming wireless signal transmitted from the partner communication device, a time slot in which the incoming wireless signal will be transmitted later from the partner communication device, and the antenna control portion switches, for the time slot that has been detected by the receiving detection portion, to the one of the plurality of directional antennas that received the incoming wireless signal that was transmitted from the partner communication device.