UMTS telecommunications system for enabling a mobile station...

Details UMTS telecommunications system for enabling a mobile station... UMTS telecommunications system for enabling a mobile station...

2007-11-27

2007-11-27

Pham, Chi (Department: 2616)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C455S432100, C455S436000

Reexamination Certificate

active

10030387

ABSTRACT:
A telecommunication system including a mobile station, and means for a mobile station to receive voice-over Internet Protocol (VoIP) calls when it is roaming away from a home network, comprising: means for informing a serving GGSN of the International Mobile subscriber Identity (IMSI) of the called mobile station, and means for enabling a local VoIP control server to map a called MSISDN number to the IMSI number.

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XP 002020137, Proposed Operation of GSM Packet Radio Networks by J. Hamalainen.

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