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TERMINAL POSITIONING METHOD, TERMINAL POSITIONING SYSTEM, POSITIONING SERVER, AND PROGRAM

  • US 20090042585A1
  • Filed: 03/16/2007
  • Published: 02/12/2009
  • Est. Priority Date: 03/17/2006
  • Status: Abandoned Application
First Claim
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1. A terminal positioning method of specifying position of a terminal by using at least one of a plurality of positioning systems,wherein a use state of one or more first positioning systems in the plurality of positioning systems is monitored by a failure detector, thereby detecting a failure of at least one second positioning system other than the one or plurality of first positioning systems.

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