Mobile handset with position calculation function
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United States of America Patent
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-
Aug 9, 2005
Grant Date -
Sep 19, 2002
app pub date -
Mar 12, 2002
filing date -
Mar 19, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
To extend the areas where a mobile handset can determine its position using radio waves, the present invention provides a mobile handset that is equipped with both position calculation means using radio waves from GPS satellites and position calculation means using RF carriers from cellular base stations. Positioning results obtained from both of these position calculation means are combined and weighted with GPS positioning reliability and cellular positioning reliability, respectively. A weighted mean of these results is then output as a final position calculation result.
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