Patent ID: 8295218

Claim:
A wireless communication apparatus which performs, with a communication terminal, predetermined data communication during an active interval, and does not perform the predetermined data communication during an inactive interval, the wireless communication apparatus comprising: an interval set section that alternately sets the active interval and the inactive interval; a base station communication section that performs the predetermined data communication with the communication terminal as well as transmitting a beacon, after performing a first modulation on the beacon, to the communication terminal during the active interval which is set by the interval set section, the beacon including information indicating a start timing of a subsequent active interval which is set by the interval set section; and a sub-beacon transmission section that transmits a sub-beacon to the communication terminal during the inactive interval, after performing a second modulation, which is a modulation method simpler than that used in the first modulation, on the sub-beacon including time information and a synchronization symbol, the time information providing notice of a transmission timing of a subsequent beacon which is to be transmitted by the base station communication section.