Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2004-12-16
2009-06-02
Black, Thomas G (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
C342S387000, C455S456200, C455S456500
Reexamination Certificate
active
07541977
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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Ali Ahmed
Touag Athmane
Black Thomas G
Chen Shelley
InterDigital Technology Corporation
Volpe and Koenig PC
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