System and method of managing temporary mobile station identity

Details System and method of managing temporary mobile station identity System and method of managing temporary mobile station identity

1997-04-30

1999-07-06

Bost, Dwayne D.

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455422, 455436, H04Q 730, H04Q 738

Patent

active

059208147

ABSTRACT:
A system and method of managing Temporary Mobile Station Identity (TMSI) parameters in a radio telecommunications network having a first mobile switching center (MSC), a second MSC, and a mobile station operating initially in a service area of the first MSC. A first Validity Area Parameter (VAP) is transmitted from the first MSC and a second VAP is transmitted from the second MSC. The first MSC then assigns a first TMSI to the mobile station, and utilizes the first TMSI to identify the mobile station while the mobile station operates within the service area of the first MSC. The mobile station then determines whether it is receiving the second VAP, and invalidates the first TMSI upon determining that the mobile station is receiving the second VAP. The mobile station then registers in the second MSC utilizing the mobile station's Mobile Identification Number (MIN). The second MSC then assigns a second TMSI to the mobile station which is utilized to identify the mobile station while the mobile station operates within the service area of the second MSC. In an alternative embodiment, TMSIs are allocated by each visitor location register (VLR) in the network, and a single TMSI is utilized to identify the mobile station in all MSCs associated with the allocating VLR.

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M. Mouly and M.B. Pautet; "The GSM System for Mobile Communications"; 1992; pp. 489-492; Palaiseau, France XP002080984.
"Temporary Mobile Station Identify (TMSI)--Stage 2 Description (rev 0.3)", Qualcomm Incorporated, Dec. 11, 1995.

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