Radio communication system and communication terminal equipments

Details Radio communication system and communication terminal equipments Radio communication system and communication terminal equipments

1996-04-23

1998-12-22

Cuchlinski, Jr., William A.

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

455 675, 455454, 455552, H04B 110, H04B 1500

Patent

active

058527672

ABSTRACT:
First and second radio communication units communicate using the frequency band of an existing microwave transmission system. A judgment whether the first communication unit is within communication range is performed based on information specifying the position of a base station of another radio communication system which is obtained therefrom. If found to be within communication range, the first communication unit shifts to a state and transmits a registration message to the second communication unit, which is then shifted to a transmission state. Interference in the existing microwave transmission system is prevented with a simple construction and without adding a circuit for confirming the present position of a communication unit.

REFERENCES:
patent: 5307400 (1994-04-01), Sawyer et al.
patent: 5475677 (1995-12-01), Arnold et al.
patent: 5475866 (1995-12-01), Ruthenberg
patent: 5504803 (1996-04-01), Yamada et al.
patent: 5574973 (1996-11-01), Borth et al.
patent: 5594947 (1997-01-01), Grube et al.
patent: 5649303 (1997-07-01), Hess et al.
patent: 5655218 (1997-08-01), Smolinske

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