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User paging for mobile satellite communications

  • US 5,619,209 A
  • Filed: 01/14/1994
  • Issued: 04/08/1997
  • Est. Priority Date: 01/14/1994
  • Status: Expired due to Term
First Claim
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1. A method of initiating communication between a ground station and a mobile handset through a satellite beam, comprising the steps of:

  • (a) transmitting a forward signal indicative of a fixed geographic area as at least one of a plurality of coverage satellite beams passes over said fixed geographic area on at least a periodic basis;

    (b) registering the location of said mobile handset by storing, at said mobile handset, at least one variable geographic value,indicative of at least a portion of said fixed geographic area, based on said forward control signal received by said mobile handset, transmitting a reverse signal from said mobile handset to said ground station which is indicative of a portion of said fixed geographic area where said mobile handset was located during registration, and storing at least one variable geographic value associated with said reverse signal in a database accessible to said ground station;

    (c) determining at said mobile handset whether a currently transmitted forward signal matches said variable geographic value stored, and if a match is not found, then repeating said step of registering to re-register the current location of said mobile handset; and

    (d) determining which of said satellites beams should initiate a call signal from said ground station to said mobile handset based upon said variable geographic value stored in said database for said mobile handset.

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