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Cellular communicating network and method for locating mobile stations using hierarchically arranged databases

  • US 6,370,378 B1
  • Filed: 06/28/1999
  • Issued: 04/09/2002
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Fees
First Claim
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1. A cellular mobile communication network including a plurality of base stations for respectively covering base station areas, the base station areas being assembled into a plurality of location areas and the base station areas of each location area being assembled into a plurality of control groups, the network comprising:

  • a first database for maintaining a plurality of mobile records, each of the mobile records indicating one of said base station areas when a mobile station crosses a boundary between adjacent location areas and enters said one base station area;

    a second database associated with one of said control groups of base station areas for maintaining a plurality of mobile records, one of the mobile records indicating a base station area when said mobile station successively crosses a boundary between adjacent base station areas of one of said location areas;

    a first controller responsive to a call request for accessing one of the mobile records in said first database to identify one of said control groups of base station areas and producing a search request; and

    a second controller associated with one of said control groups of base station areas, the second controller being responsive to said search request for accessing one of said mobile records of said second database and transmitting a paging signal to at least one base station area indicated in the accessed mobile record to wait for a response from said mobile station and broadcasting the paging signal to remaining base station areas of said identified control group if said response is not returned from said mobile station.

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