Patent ID: 7688767

Claim:
An access point (AP) apparatus for allocating a transmission period in a frame period in a wireless network system, the apparatus comprising: a processor which generates a power save multi-poll (PSMP) frame allocating a downlink period and an uplink period in the frame period to a station (STA), and which, after the expiration of the downlink and uplink periods provided by the PSMP frame, generates a subsequent PSMP frame allocating at least one of an additional downlink period and an additional uplink period in the frame period to the STA requiring additional resource allocation; and a transceiver which transmits data to the STA during the downlink period and receives data from the STA during the uplink period, and which transmits data to the STA during the additional downlink period in response to there being additional data to be transmitted and receives data from the STA during the additional uplink period in response to there being additional data to be received.