Method and apparatus for WLAN-UMTS interworking employing...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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C455S435100

Reexamination Certificate

active

07050800

ABSTRACT:
A method enabling a wireless remote terminal (UE) to access a universal mobile telecommunication system (UMTS) through a wireless local area network (WLAN) wherein UMTS services are transmitted to a format converter from a UMTS transceiver and the format converter changes the format of received messages to a WLAN format before transmission to the UE which is operating in the WLAN mode.

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Gerdes M. et al, “TCP Performance Analysis of Inter-System Handover Between WLAN and A UMTS Radio Access Network,” Oct. 6, 1999, ITG Fachberichte, VDE Verlag, pp. 345-349.
Shiao-Li Tsao et al., “Design and Evaluation of UMTS-WLAN Interworking Strategies,” VTC 2002-Fall. 2002 IEEE 56th. Vehicular Technology Conference Proceedings. Vancouver, Canada, Sep. 24-28, 2002, IEEE Vehicular Technology Conference, New York: NY: IEEE, US, vol. 1 of 4. Conf. 56, Sep. 24, 2002, pp. 777-781.

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