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Method and apparatus for determining time for GPS receivers

  • US 5,945,944 A
  • Filed: 04/24/1997
  • Issued: 08/31/1999
  • Est. Priority Date: 03/08/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining a position of a mobile global positioning system receiver, said mobile global positioning system receiver receiving global positioning system signals from at least one of a plurality of global positioning system (GPS) satellites, said method comprising:

  • receiving a cellular communication signal in a mobile communication receiver coupled to said mobile global positioning system receiver, said cellular communication signal having a time indicator which represents a time event;

    associating said time indicator with data representing a time of arrival of a GPS satellite signal at said mobile global positioning system receiver; and

    determining a position information of said mobile global positioning system receiver, wherein said data representing said time of arrival of said GPS satellite signal and said time indicator are used to determine said position information of said mobile global positioning system receiver and wherein said cellular communication signal supports 2-way communications.

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