Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2011-03-01
2011-03-01
Afshar, Kamran (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S506000, C455S404200, C455S067160, C455S456500, C455S456600
Reexamination Certificate
active
07899467
ABSTRACT:
A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.
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Feuerstein Martin
Gordon Scot Douglas
Spain, Jr. David Stevenson
Afshar Kamran
DeMont & Breyer LLC
Polaris Wireless, Inc.
Sarwar Babar
LandOfFree
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