InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,541,977
Ali , et al. June 2, 2009

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Method and wireless communication system for locating wireless transmit/receive units


Abstract
A method and system for locating a wireless transmit/receive unit (WTRU) is disclosed. A wireless communication system comprises a plurality of access points (APs). Each AP broadcasts a message indicating class-of-service (COS) types that the wireless communication system supports. After a WTRU registers with one of the plurality of APs, the WTRU receives the broadcast message. The WTRU sets a timer for location update in accordance with an application that the WTRU is running and the COS type with which it is associated. The WTRU transmits a location update frame to the APs at the expiration of the timer, and a location of the WTRU is calculated using the location update frame.


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Inventors: Ali; Ahmed (Verdun, CA), Touag; Athmane (Laval, CA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/014,254
Filed: December 16, 2004

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
60530064 Dec., 2003


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Current U.S. Class: 342/463 ; 342/387; 455/456.2; 455/456.5
Current International Class: G01S 1/24 (20060101)
Field of Search: 342/450-451,457,463-464,386-387 455/404.2,456.1-456.2,456.6