Efficient power management in wireless local area networks

Details Efficient power management in wireless local area networks Efficient power management in wireless local area networks

2005-01-12

2009-10-13

Corsaro, Nick (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S343400, C370S458000, C370S338000

Reexamination Certificate

active

07603146

ABSTRACT:
A method of providing power management in a Wireless Local Area Network (WLAN) is presented. The method includes receiving a Traffic Indication Map (TIM) at a station, indicating the presence of buffered frames, associated with any AC, for the station at an Access Point (AP). The method further includes sending, by the station, one of an uplink data frame if one is buffered, and a null frame to retrieve the buffered frames from said AP. The station remains awake to receive frames from the AP until a downlink frame is received containing an indication that it is the last frame to be transmitted in the service period. The method may further include determining at the end of service period whether there are more frames remaining buffered for the station at the AP.

REFERENCES:
patent: 6934870 (2005-08-01), Amos
patent: 2004/0184475 (2004-09-01), Meier
patent: 2005/0135302 (2005-06-01), Wang et al.
patent: 2006/0182071 (2006-08-01), Soomro
European Patent Office Supplementary Search Report, pp. 1-4.
IEEE Computer Society: “std 802.11, 1999 Edition (R2003) Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications” ANSI/IEEE, (Online) Jun. 12, 2003; pp. 1, 2, 57, 58, 90, 91, 128-136.
IEEE Standard Department: “IEEE Std 802.11e/D3.0—Part 11: Wireless Medium Access Control (MAC) and physical layer (PHY) specifications: Medium Access Control (MAC) Enhancements for Quality of Service (Qos)” IEEE Computer Society, (Online) May 2002; pp. 1-132.

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