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Methods, mobile stations and systems for acquiring global positioning system timing information

  • US 6,295,023 B1
  • Filed: 01/21/2000
  • Issued: 09/25/2001
  • Est. Priority Date: 01/21/2000
  • Status: Expired due to Term
First Claim
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1. A method for acquiring GPS timing information at a mobile station including a GPS receiver comprising the steps executed at the mobile station of:

  • receiving assistance information from a communication network;

    acquiring a plurality of GPS satellites using the received assistance information;

    determining expected fields in navigation messages [information] associated with at least one of the plurality of acquired GPS satellites based on the received assistance information;

    correlating actual information received from the at least one of the plurality of acquired GPS satellites with the associated determined expected fields in navigation messages for a plurality of delays to provide a quality indication for each of the plurality of delays; and

    determining the GPS timing information based on the quality indications.

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