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Method and apparatus for determining a location of a communication unit in a wireless communication system

  • US 6,167,275 A
  • Filed: 12/17/1997
  • Issued: 12/26/2000
  • Est. Priority Date: 12/17/1997
  • Status: Expired due to Term
First Claim
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1. A method for locating a mobile communication unit in a communication system, the method comprising the steps of:

  • receiving, at a first base site and at least a second base site, an information signal transmitted by a first communication unit and a calibration signal transmitted by a second communication unit, the second communication unit being located at a known location;

    determining, by the first base site, first timing information based at least on the information signal received at the first base site;

    determining, by the first base site, first calibration information based on the calibration signal received at the first base site;

    determining, by the at least a second base site, at least second timing information based at least on the information signal received at the at least a second base site;

    determining, by the at least a second base site, at least second calibration information based on the calibration signal received at the at least s second base site; and

    determining a location of the first communication unit based on the first timing information, the at least second timing information, the first calibration information, and the at least second calibration information.

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