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Method for calculating the position of a mobile terminal, positioning system, and position calculation apparatus

  • US 20040172190A1
  • Filed: 01/14/2004
  • Published: 09/02/2004
  • Est. Priority Date: 02/27/2003
  • Status: Active Grant
First Claim
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1. A method for calculating the position of a mobile terminal, using differences between propagation distances of radio signals being transmitted and/or received on channels between base stations and a mobile terminal, said method comprising:

  • measuring differences between propagation distances of radio signals on channels between a plurality of base stations and a mobile terminal;

    determining if the mobile terminal is located in close proximity to a base station;

    calculating the position of the mobile terminal by a common formula if it is determined that said mobile terminal is not in close proximity to any of said base stations;

    calculating the position of the mobile terminal in close proximity to a base station if it is determined that said mobile terminal is in close proximity to one of said base stations; and

    outputting the position of the mobile terminal calculated.

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