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Method and apparatus for implementing international wireless roaming

  • US 6,259,914 B1
  • Filed: 08/07/1998
  • Issued: 07/10/2001
  • Est. Priority Date: 08/07/1998
  • Status: Expired due to Term
First Claim
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1. A method for facilitating mobile phone service within a visited cellular system to a foreign mobile station having a foreign mobile identification number, the method comprising:

  • transmitting the foreign mobile identification number from the foreign mobile station to the visited cellular system;

    accessing an international roaming service home location register, where the international roaming service home location register is populated with a plurality of subscribed foreign mobile identification numbers and with a plurality of unassigned North American Numbering Plan-formatted (NANP) mobile directory numbers reserved for assignment to subscribed foreign mobile stations, to determine the foreign mobile station is a subscriber;

    associating a North American Numbering Plan-formatted (NANP) mobile directory number with the foreign mobile identification number;

    transmitting the NANP mobile directory number to a switch serving the foreign mobile station; and

    using the NANP mobile directory number within the switch when the foreign mobile station originates a call.

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