Patent ID: 7672259

Claim:
A wireless network system, comprising: an access point (AP) to transmit a first power save multi-poll (PSMP) frame allocating a downlink period and an uplink period and transmit a subsequent PSMP frame allocating an additional uplink period after the downlink and uplink periods, wherein the subsequent PSMP is an additional PSMP frame to follow the first PSMP frame; and a station (STA) to transmit to the AP during the uplink period a part of the queued data and a resource request message requesting allocation of an additional resource for at least a portion of remaining queued data of the STA, if the uplink period is insufficient for transmitting the queued data, and to receive from the AP the subsequent PSMP frame allocating the additional uplink period and transmit the at least a portion of remaining queued data to the AP during the additional uplink period.