Patent ID: 8010168

Claim:
A method of providing power management in a Wireless Local Area Network (WLAN) comprising: receiving a Traffic Indication Map (TIM) at a station, said TIM indicating the presence of buffered frames, associated with any access category (AC), for said station at an Access Point (AP), wherein said TIM indicates the presence of scheduled frames and wherein said TIM also indicates the presence of unscheduled frames such that stations with non-periodic traffic are able to use Automatic Power Save Delivery (APSD) to retrieve said unscheduled frames; sending, by said station, one of an uplink quality-of-service (QoS) Data frame when one is buffered, and a Null frame to retrieve said buffered frames from said AP; and said station remaining awake to receive frames from the AP, as indicated by the TIM, until a downlink frame is received containing an indication that it is the last frame to be transmitted in the service period.