Prevention of alteration of location information for mobile-based location calculation
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United States of America Patent
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-
Apr 10, 2001
Grant Date -
N/A
app pub date -
Sep 29, 1998
filing date -
Sep 29, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A telecommunications system and method is disclosed for minimizing the chances of a mobile subscriber altering the calculated location of an associated mobile terminal when the positioning measurements and location calculation are performed by the mobile terminal. In order to prevent tampering with the location information, the Positioning Measurement Module (PMM) can be separated from the Location Calculation Module (LCM) by including both the LCM and topological information used for calculation of the location of the mobile terminal on a smart integrated circuit (IC) card within the mobile terminal. When the PMM obtains positioning measurement information, this positioning information is encrypted and sent to the LCM within the smart card, which then deciphers the encrypted information and uses the positioning information and stored topological information to calculate the location of the mobile terminal.
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