Title:
A UNIFORM POWER SAVE METHOD FOR 802.11E STATIONS
Document Type and Number:
WIPO Patent Application WO2005011204
Kind Code:
A3
Abstract:
A power-save QSTA notifies an Access Point (AP) that its operating in a automatic power-save delivery (APSD) mode and negotiates a periodic wakeup schedule and a scheduled startup time with the AP. Wakeup times are synchronized with the 802.11 Timer Synchronization Function (TSF). The AP automatically sends frames to the QSTA when it determines the QSTA is in an awake state, otherwise downlink frames are buffered. The AP uses a combination poll+EDCF access method wherein at the start of each wakeup period the AP sends a poll to the QSTA, the poll having a flag that indicates to the QSTA if the AP has a downlink fame buffered for the QSTA. In addition, a Proxy ARP Server in an AP maintains IP/MAC bindings for associated clients so that when the AP receives a proxy ARP request for a client, the AP may respond for the client.
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Inventors:
MEIER ROBERT C
BILSTAD MARK
BILSTAD MARK
Application Number:
PCT/US2004/019415
Publication Date:
June 30, 2005
Filing Date:
June 18, 2004
Export Citation:
Assignee:
CISCO TECH IND (US)
International Classes:
H04L12/28; H04L29/08; H04W52/02; (IPC1-7): H04L12/28
Foreign References:
| US20030076804A1 | 2003-04-24 | |||
| US20020193073A1 | 2002-12-19 |
Other References:
IEEE: "802.11 MAC and PHY specifications, pages 123-151", 1997, IEEE, NEW YORK, USA, XP002307288
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