Patent ID: 8358364

Claim:
A communication system in which a first electronic apparatus communicates with a second electronic apparatus, the first electronic apparatus comprising a receiver configured to receive, from the second electronic apparatus, a command signal which instructs change of a power control state, a first transmitter configured to transmit, to the second electronic apparatus, standby-capability information which includes a communication method adopted by the receiver and a signal form specifying the command signal, and a change module configured to change the power control state when the receiver receives the command signal, and the second electronic apparatus comprising a second transmitter configured to transmit the command signal which instructs the first electronic apparatus to change the power control state, a third transmitter configured to transmit, to the first electronic apparatus, transmission-capability information which includes a communication method adopted by the second transmitter and a signal form specifying the command signal, and a selection module configured to select to transmit the command signal included in the transmission-capability information, when communicating with the first electronic apparatus through the third transmitter.