Patent ID: 6259914
Filing Date: 2001-07-10
Classification: H04W

Abstract:
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; andusing the NANP mobile directory number within the switch when the foreign mobile station originates a call.