Method and system for providing location updates
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United States of America Patent
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-
Feb 10, 2009
Grant Date -
Oct 19, 2006
app pub date -
Apr 4, 2006
filing date -
Apr 13, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and system of updating location information of a portable computing device is disclosed. Location data is received from a positioning device. A voice link is utilized for communication between the portable computing device and a call center. A dual-tone multi-frequency signal is mapped to a pre-determined range of movement. The dual-tone multi-frequency signal is transmitted to the call center when a longitude measurement in the location data indicates a change in longitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of longitude change of location of the portable computing device. In addition, the dual-tone multi-frequency signal is transmitted to the call center when a latitude measurement in the location data indicates a change in latitude that is within the pre-determined rage of movement. The dual-tone multi-frequency signal is transmitted as an indicator of latitude change of location of the portable computing device.
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