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Method for delivering assistance data in an unsynchronized wireless network

  • US 6,903,683 B1
  • Filed: 11/19/2003
  • Issued: 06/07/2005
  • Est. Priority Date: 11/19/2003
  • Status: Expired due to Term
First Claim
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1. A method for assisting a mobile terminal in an unsynchronised wireless communications network to determine its location using a global positioning system (GPS) by providing a GPS receiver of the mobile terminal with reference time data, said method including:

  • obtaining a first time signal that is substantially synchronised with the GPS time, determining a network latency time indicative of least an approximate network latency for the transmission of the reference time data through the network to the mobile terminal;

    generating the reference time data based on the first time signal and the network latency time; and

    transmitting at least the reference time data to the mobile terminal.

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