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Location system and method for client terminals which provide location-based service to mobile terminals

  • US 20040157620A1
  • Filed: 12/29/2003
  • Published: 08/12/2004
  • Est. Priority Date: 12/27/2002
  • Status: Active Grant
First Claim
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1. A location system for a client terminal which provides a location-based service over a coverage area, comprising:

  • at least one mobile communication network for storing information indicating an area in which a mobile terminal is located and determining location of said mobile terminal in response to a location request message;

    first means, responsive to a location request message from said client terminal requesting location information of a target mobile terminal, for retrieving area indicating information from said network corresponding to identity of said target mobile terminal to determine the area in which said target mobile terminal is located; and

    second means for forwarding the location request message to said network to determine the location of said target mobile terminal if said determined area is within said coverage area and transmitting an error message to said client terminal if said determined area is outside of said coverage area.

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