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Secure dialing in mobile telephone system

  • US 5,940,515 A
  • Filed: 08/13/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 08/13/1996
  • Status: Expired due to Term
First Claim
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1. In a cellular communication system for telephonic communication between a base station and a plurality of mobile stations, a method of securely initiating a telephonic communication by a mobile station, comprising the steps of:

  • transmitting, via, an access channel, a modified origination message from a mobile station to a base station, the modified origination message having a dialed number field set to show an absence of a dialed number, and a More-- Field set to indicate a following origination continuation message;

    placing the dialed number in the origination continuation message;

    transmitting the origination continuation message from the mobile station to the base station via a traffic channel; and

    providing greater security to said traffic channel than to said access channel.

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