Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-07-31
1998-12-01
Vo, Nguyen
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 671, 455 673, 455 63, H04Q 720
Patent
active
058452095
ABSTRACT:
A mobile radio communications system which keeps operational even when the signal reception conditions deteriorate due to interference. Mobile stations in the system communicate through radio communication channels via a base station. A plurality of interference monitor stations are fixedly placed in the service zone of the base station. The interference monitor stations, being wired to the base station via telecommunications lines, constantly monitors transmission signals sent from the base station. A reception condition monitoring unit watches the reception conditions of the transmission signals to detect interference. If any interference is detected, an interference detection signal output unit sends an interference detection signal to the base station via the telecommunications lines. Upon reception of the interference detection signal, a carrier switching controller forces a carrier of the transmission signal to be switched to another carrier after confirming predefined conditions.
REFERENCES:
patent: 5139769 (1992-08-01), Grube et al.
patent: 5142694 (1992-08-01), Jackson et al.
patent: 5555192 (1996-09-01), Grube et al.
patent: 5603093 (1997-02-01), Yoshimi et al.
patent: 5649303 (1997-07-01), Hess
Armstrong Darnell R.
Fujitsu Limited
Vo Nguyen
LandOfFree
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