Method for performing roaming capable of minimizing...

Details Method for performing roaming capable of minimizing... Method for performing roaming capable of minimizing...

2006-02-07

2008-11-11

Ly, Nghi H (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S436000, C455S456100, C370S331000, C370S335000

Reexamination Certificate

active

07450941

ABSTRACT:
Disclosed is a method for performing roaming capable of minimizing a ping-pong phenomenon and a dual mode mobile terminal using the same. Functions for the method for performing roaming and the dual mode mobile terminal using the same are realized such that a ping-pong phenomenon occurring in a shadow area of one of the communication networks providing communication services using different mobile communication techniques can be minimized. To this end, it is determined if the dual mode mobile terminal is in a shadow area by counting the number of ping-pong occurrences in the process of performing a mode based on a corresponding communication service and a ping-pong period is adjusted only when the dual mode mobile terminal is in the shadow area, thereby minimizing a ping-pong phenomenon.

REFERENCES:
patent: 6314290 (2001-11-01), Joshi et al.
patent: WO 01/03464 (2001-01-01), None
patent: WO 01/58190 (2001-08-01), None
patent: WO 2004/047479 (2004-06-01), None

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