Patent ID: 8446855

Claim:
An access point for establishing wireless connection with one or more wireless communication stations which can perform intermittent reception operation, based on a packet transmission system which allocates wireless bands by CSMA/CA, comprising: circuitry configured to describe, in a same packet or in respective packets, buffering information on a downlink packet addressed to a subordinate wireless communication station currently in an intermittent reception state, and transmission prohibition period information indicating a period where transmission from said subordinate wireless communication station is prohibited; a transmitter that transmits the instruction described packet in which description has been made by said circuitry, to said subordinate wireless communication station, wherein the circuitry is configured to make a state of said access point transition to a Doze state immediately after said instruction described packet is transmitted by said transmitter or when a predetermined number of downlink packets are transmitted, make a state of said access point transition to an Awake state when said transmission prohibition period elapses from the time of transmission of the packet in which said transmission prohibition period information is described, set a transmission timing of said instruction described packet, and control the transmitter to transmit said instruction described packet at the set transmission timing.