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Methods and apparatus for supporting optimum call routing in a cellular telecommunications system

  • US 6,871,072 B1
  • Filed: 09/23/1997
  • Issued: 03/22/2005
  • Est. Priority Date: 09/23/1997
  • Status: Expired due to Fees
First Claim
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1. A method for operating a wireless telecommunications system, comprising the steps of:

  • providing a telephone number and an identifier for specifying that a caller is calling a mobile station that is believed to be roaming in a particular serving system, where providing the telephone number includes an initial step of entering the telephone number of the called mobile station into a memory of a calling mobile station, followed by an identifier character;

    receiving said telephone number and said identifier in the serving system;

    detecting the presence of said identifier and, in response, without interrogating another serving system, determining if said telephone number is one that is stored in a Visitor Location Register of said serving system; and

    if yes, paging said mobile station in said serving system.

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