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System and method for providing time to a satellite positioning system (SPS) receiver from a networked time server

  • US 7,142,156 B2
  • Filed: 05/13/2004
  • Issued: 11/28/2006
  • Est. Priority Date: 12/19/2002
  • Status: Active Grant
First Claim
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1. A system for aiding signal acquisition in a satellite positioning system (SPS) comprising:

  • an SPS receiver, the SPS receiver containing circuitry to receive transmissions from a plurality of SPS satellites and compute, from the received transmissions, its current position and the current SPS Time;

    a communications processor coupled to the SPS receiver, the communications processor containing circuitry to obtain time information from a communications network wherein the time-of-day information is from a source other than the satellite position system (SPS) and to provide the time information to the SPS receiver, wherein the communications processor comprises;

    a time server client coupled to the first communications network, the time server client containing circuitry to interface with the time server;

    a real-time clock coupled to the time server client, the real-time clock to maintain a time as provided by the time server; and

    a pulse and message generator (PMG) coupled to the real-time clock, the PMG containing circuitry to provide time information taken from the real-time clock to the SPS receiver;

    a first communications network coupled to the communications processor; and

    a time server coupled to the first communications network, the time server containing circuitry to maintain accurate time and to response to time queries.

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