Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-04-19
2009-02-03
Phu, Sanh D (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S436000, C455S414100, C455S414200, C455S132000, C370S331000, C370S337000
Reexamination Certificate
active
07486964
ABSTRACT:
A method for performing roaming in a dual mode mobile terminal in such a manner that a ping-pong phenomenon, occurring under a weak electric field between communication networks providing communication services using different mobile communication techniques can be prevented. To this end, a communication path connected between modems performing a corresponding communication service is realized, so that roaming to a target mode can be achieved only in a case in which the intensity of a received signal measured through a target modem for the roaming has at least a predetermined threshold value. Where the intensity of the received signal has not at least the predetermined threshold value, a current mode is continuously maintained.
REFERENCES:
patent: 6438117 (2002-08-01), Grilli et al.
patent: 2004/0137903 (2004-07-01), Park
patent: 2004/0192224 (2004-09-01), Kaneko
patent: 2005/0070272 (2005-03-01), Marangos
patent: 2007/0104142 (2007-05-01), Kim
patent: 1535042 (2004-10-01), None
patent: WO 2005/034389 (2005-04-01), None
Phu Sanh D
Samsung Electronics Co,. Ltd.
The Farrell Law Firm P.C.
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