Wireless telecommunications location based services scheme...

Details Wireless telecommunications location based services scheme... Wireless telecommunications location based services scheme...

2007-04-03

2007-04-03

Tieu, Benny Quoc (Department: 2614)

Telecommunications

Radiotelephone system

Emergency or alarm communication

C455S456100

Reexamination Certificate

active

10379940

ABSTRACT:
An intelligent system for choosing selection schemes to be tried in a predetermined order for determining the location of a wireless mobile client, including retrieving a last known position record from a cache, checking serving network capability, choosing an initial selection scheme according to parameters including at least the required response time and the requested location method, including a method employing navigational satellites, attempting to retrieve a current position record, trying successive untried selection schemes in turn according to a predetermined algorithm if no current position record has been retrieved, and returning the current position record and updating the last known position record, or returning an error if no current position record has been retrieved, and returning the last known position record if an error has been returned, the last known position record exists in the cache and the last known position record has not expired.

REFERENCES:
patent: 5974300 (1999-10-01), LaPorta et al.
patent: 6757545 (2004-06-01), Nowak et al.
patent: 6813501 (2004-11-01), Kinnunen et al.
patent: 6868074 (2005-03-01), Hanson
patent: 6885869 (2005-04-01), Raith
patent: 2002/0173317 (2002-11-01), Nykanen et al.

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