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Position detection method, position detection system, and position detection server equipment

  • US 7,212,830 B2
  • Filed: 02/01/2005
  • Issued: 05/01/2007
  • Est. Priority Date: 05/21/2004
  • Status: Active Grant
First Claim
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1. A position detection method in a terminal position detection system, the detection system including a plurality of terminals, a plurality of access points capable of conducting radio communications with said terminals, and server equipment connected to said plurality of access points via a network, said server equipment being adapted to perform a position measurement procedure for measuring a position of the terminal using a signal transmitted/received between said terminal and one of said plurality of access points, the method comprising the steps of:

  • in the case of repetitively performing a position detection procedure, performing a group composition determination procedure which involves determining whether two or more terminals should be classified as belonging to a same group based on detected positional information for said plurality of terminals;

    selecting at least one terminal from the terminals belonging to the same group as a representative terminal of the group;

    performing said position measurement procedure of the selected representative terminal; and

    estimating the position of the terminal other than the representative terminal and belonging to the same group using a relative velocity thereof to said representative terminal so as to detect the position of the terminal, thereby performing a group position detection procedure.

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