Methods and apparatus for transferring position data between terminals in wireless communications systems
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United States of America Patent
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Oct 15, 2002
Grant Date -
N/A
app pub date -
Dec 21, 1998
filing date -
Dec 21, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Techniques for ascertaining the geographic position of users and terminals in a wireless communications system are used, for example, by operations personnel in performing system maintenance and by emergency personnel in locating lost or injured individuals. According to an exemplary method of requesting and obtaining user position information, user terminals in a wireless communications system routinely transmit position information to mobile switching centers in the system, and the mobile switching centers maintain up-to-date terminal position information in visiting location registers. Requests for user position information are routed to a home location register which in turn routes terminal position requests to mobile switching centers with which the target users are registered. Terminal position information is retrieved from the appropriate visiting location registers and sent back to the requesting parties with a minimum of system traffic.
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