Mobile handset with position calculation function

Details Mobile handset with position calculation function Mobile handset with position calculation function

2005-08-09

2005-08-09

Chin, Vivian (Department: 2682)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456300, C455S456500, C455S456600, C342S357490, C342S357490

Reexamination Certificate

active

06928292

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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Nikkei Communications 2000.7.17, pp. 115-121.

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