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Server-assisted position determination in a radio network

  • US 20020173909A1
  • Filed: 03/08/2002
  • Published: 11/21/2002
  • Est. Priority Date: 03/09/2001
  • Status: Active Grant
First Claim
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1. A server-assisted position detection system, comprising:

  • a client global positioning system (GPS) receiver circuit, for receiving a first set of satellite positioning signal data from GPS satellites, the first set of data being insufficient to independently establish the location of the client GPS receiver;

    a client transmitter to transmit the first set of data;

    a client carrier detection module to detect radio traffic on a radio frequency (RF) channel;

    a client transmit-enable module to enable the client transmitter when no radio traffic is detected on the RF channel;

    a server receiver to receive the first set of data from the client transmitter; and

    a server coupled to the server receiver and configured to analyze the satellite data received by the server receiver, the server using the first set of data and additional satellite positioning signal data to generate location information regarding the location of the client GPS receiver.

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