Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-07-01
2008-07-01
Trost, William (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456300, C455S456500, C455S550100, C455S558000, C455S405000, C701S207000, C340S429000, C342S357490
Reexamination Certificate
active
11223842
ABSTRACT:
A wireless device and method for providing location updates to a wireless network includes determining a current location of the wireless device, comparing the current location to a second location and transmitting a location update, including presence information, to the wireless network when the current location differs from the second location by at least a predetermined geographical distance. The predetermined geographical distance is determined in accordance with at least one of subscription information associated with the subscriber unit, including a subscription fee paid, an enabled service and a network state. The current location may be determined via GPS, wireless network based position determination or other method.
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Ewald Robert C.
Posner Jeffrey Scott
Afshar Kamran
Nextel Communications Inc.
Trost William
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