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System for providing alert-based services to mobile stations in a wireless communications network

  • US 8,606,302 B2
  • Filed: 06/11/2012
  • Issued: 12/10/2013
  • Est. Priority Date: 07/16/2001
  • Status: Expired due to Term
First Claim
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1. A method of accessing a data structure for obtaining an earliest expected travel time between a current location of a mobile station and a plurality of alert regions, the data structure comprising data regarding a subdivision of a network into cells for which a respective alert region is the nearest to all points in a respective cell, the method comprising:

  • (a) using a point-location data structure to determine which cell contains the current location;

    (b) using a table to determine the alert region associated with the cell found in step (a); and

    (c) determining the travel time from the current location to the alert region found in step (b).

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