Systems, methods and terminals that obtain coarse position information from satellite radiotelephone systems
First Claim
1. A mobile radiotelephone terminal comprising:
- a satellite radiotelephone that obtains a coarse position of the mobile radiotelephone terminal from satellite radiotelephone system communications; and
a global positioning system (GPS) receiver that uses the coarse position to determine an accurate position of the mobile radiotelephone terminal.
2 Assignments
0 Petitions
Accused Products
Abstract
A mobile radiotelephone terminal having a satellite radiotelephone and a Global Positioning System (GPS) obtains a coarse position of the mobile radiotelephone terminal from satellite radiotelephone system communications. The GPS receiver uses the coarse position to determine an accurate position of the mobile radiotelephone terminal. Accordingly, by obtaining a coarse position from the satellite radiotelephone systems communications, the computation time for the GPS receiver to compute an accurate position of the mobile radiotelephone terminal may be reduced. By allowing a reduction of computation time by the GPS receiver, an accurate position may be obtained more quickly and/or with reduced power.
25 Citations
18 Claims
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1. A mobile radiotelephone terminal comprising:
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a satellite radiotelephone that obtains a coarse position of the mobile radiotelephone terminal from satellite radiotelephone system communications; and
a global positioning system (GPS) receiver that uses the coarse position to determine an accurate position of the mobile radiotelephone terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A position computation method for a mobile radiotelephone terminal that includes a satellite radiotelephone and a global positioning system (GPS) receiver, the position computation method comprising the steps of:
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determining a coarse position by the satellite radiotelephone from satellite radiotelephone system communications;
providing the coarse position from the satellite radiotelephone to the GPS receiver; and
using the coarse position by the GPS receiver to determine an accurate position of the mobile radiotelephone terminal. - View Dependent Claims (9, 10, 11, 12)
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13. A mobile radiotelephone terminal comprising:
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a mobile radiotelephone that repeatedly obtains coarse positions of increasing accuracy from mobile radiotelephone system communications to obtain a final coarse position of the mobile radiotelephone terminal; and
a global positioning system (GPS) receiver that uses the final coarse position to determine an accurate position of the mobile radiotelephone terminal. - View Dependent Claims (14)
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15. A position determining method for a mobile radiotelephone terminal comprising the step of:
repeatedly obtaining positions of increasing accuracy from mobile radiotelephone system communications to obtain a final position of the mobile radiotelephone terminal. - View Dependent Claims (16)
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17. A mobile radiotelephone terminal comprising:
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means for obtaining a coarse position of the mobile radiotelephone terminal from mobile radiotelephone system communications; and
means for using the coarse position to determine an accurate position of the mobile radiotelephone terminal. - View Dependent Claims (18)
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Specification