Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-05-16
2006-05-16
Le, Danh Cong (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S438000, C370S331000, C370S332000
Reexamination Certificate
active
07047010
ABSTRACT:
A system and method is disclosed for providing rescue channel communications between base stations in a wireless communication system. The invention comprises a source base station that is capable of sending messages to a rescue base station to cause the rescue base station to establish a rescue channel for a mobile station that has lost its traffic channel. The messages for establishing rescue channels communications between the base stations comprise Internetwork Operating System (IOS) messages that have been modified to add rescue channel indicator information. In an alternate advantageous embodiment of the invention, specially designed rescue channel activation messages and rescue channel activation acknowledgment messages are used to establish a rescue channel for the mobile station.
REFERENCES:
patent: 6725043 (2004-04-01), Bonta et al.
patent: 2001/0055969 (2001-12-01), Bonta et al.
patent: 2002/0058528 (2002-05-01), Hunzinger
patent: 2002/0068569 (2002-06-01), Chen et al.
patent: 2002/0072357 (2002-06-01), Matsuda
patent: 2002/0077104 (2002-06-01), Chen et al.
patent: 2002/0090965 (2002-07-01), Chen et al.
patent: 2002/0119787 (2002-08-01), Hunzinger
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