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System for setting coarse GPS time in a mobile station within an asynchronous wireless network

  • US 6,788,249 B1
  • Filed: 10/20/2003
  • Issued: 09/07/2004
  • Est. Priority Date: 07/23/2003
  • Status: Active Grant
First Claim
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1. A method for setting coarse GPS time in a GPS receiver comprising:

  • a) requesting a sequence of predicted navigation bits;

    b) receiving the predicted navigation bits;

    c) saving a time of receipt of the navigation bits;

    d) locating a predicted time indicator field within the predicted navigation bits;

    e) determining a coarse time setting in response to the located time indicator field; and

    f) setting coarse GPS time within the GPS receiver responsive to the difference between the coarse time setting and the time of receipt.

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