06259914 is referenced by 37 patents and cites 17 patents.

A method and apparatus for implementing international wireless roaming allows an international “roamer” to enter a visited system in a foreign country and originate calls. Upon entering the visited region, the roamer's mobile station initiates a registration request containing the mobile station's mobile identification number to the mobile switching center in the visited region. The mobile switching center initiates a message to an appropriate home location register. The home location register compares the mobile station's mobile identification number to a set of stored values. If an agreement is in place between the home location register provider and the roamer's home service provider, the home location register will return an appropriately formatted North American Numbering Plan mobile directory number to the mobile switching center. When the roamer initiates a call, the mobile switching center uses the mobile directory number in signaling call related information, specifically in populating parameters such as the Calling Pary Number. Recognizing a NANP-formatted number, the public switch telephone network will process the call as normal.

Title
Method and apparatus for implementing international wireless roaming
Application Number
9/130565
Publication Number
6259914 (B1)
Application Date
August 7, 1998
Publication Date
July 10, 2001
Inventor
Karl H Koster
Atlanta
GA, US
Agent
Kirkpatrick Stockton
US
Agent
Nora M Tocups Esq
US
James L Ewing IV Esq
US
Assignee
BellSouth Intellectual Property Corporation
GA, US
IPC
H04Q 7/20
View Original Source