Patent ID: 8548392

Claim:
A communication device comprising: a communication module configured to receive and transmit signals over radio waves, wherein one of the received signals is an allocation signal indicating a plurality of first periods and a plurality of second periods, each of the plurality of first periods being allocated to one of a plurality of communication devices, and each of the plurality of second periods being useable by the plurality of communication devices; and a control module configured to: make a first determination as to which one of the plurality of first periods is allocated to the communication device, make a second determination as to whether all signals which are to be received, are received, and all signals which are to be transmitted, are transmitted, within the first period which is determined to be allocated to the communication device by the first determination, and after the first period which is determined to be allocated to the communication device by the first determination, control power supply to the communication module according to the second determination; wherein the control module is configured to limit the power supply when all signals which are to be received, are received, and all signals which are to be transmitted, are transmitted, within the first period which is determined to be allocated to the communication device by the first determination.