Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-12-25
2007-12-25
Nguyen, Duc M. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S404200, C455S456500, C455S440000
Reexamination Certificate
active
10635367
ABSTRACT:
Disclosed are systems and methods which provide for location positioning in wireless networks using techniques which are adapted to provide reliable location determinations even in complex topological environments. Embodiments utilize multiple antenna patterns, such as may be provided using phased array antennas, and implement location positioning techniques which do not require alteration of remote stations in providing location positioning. Various techniques for determining location may be implemented, including a channel model independent approach, a channel model based approach, or combinations thereof. A channel model independent approach used in providing location positioning may compare receive signal strength differences to an antenna gain difference table to determine an angle in the azimuth that a remote station is located. A channel model based approach used in providing location positioning may compare receive signal strength measurements to a database of signal strengths created using a wireless channel model.
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Gong Yi
Joa-Ng Mario
Leung Hang Ching Jason
Liew Soung Chang
Wang Yan
Cai Wayne
Fulbright & Jaworski LLP
Hong Kong Applied Science and Technology Research Institute Co.
Nguyen Duc M.
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