Positioning with wireless local area networks and WLAN-aided...

Details Positioning with wireless local area networks and WLAN-aided... Positioning with wireless local area networks and WLAN-aided...

2011-03-01

2011-03-01

Le, Danh C (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456100, C455S456600, C342S450000

Reexamination Certificate

active

07899472

ABSTRACT:
Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device can quickly determine its relative and/or coordinate position based on information provided by an access point in the WLAN. Before a wireless device disassociates with the access point, the WLAN can periodically provide time, location, and decoded GPS data to the wireless device. In this manner, the wireless device can significantly reduce the time to acquire the necessary GPS satellite data (i.e. on the order of seconds instead of minutes) to determine its coordinate position.

REFERENCES:
patent: 6249252 (2001-06-01), Dupray
patent: 6473038 (2002-10-01), Patwari et al.
patent: 6515623 (2003-02-01), Johnson
patent: 7130646 (2006-10-01), Wang
patent: 2003/0134648 (2003-07-01), Reed et al.
patent: 2003/0220765 (2003-11-01), Overy et al.
patent: 2005/0255857 (2005-11-01), Kim et al.
patent: WO 01/95056 (2001-12-01), None

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