System for informing secondary users of which radio channels are

Details System for informing secondary users of which radio channels are System for informing secondary users of which radio channels are

1995-03-24

1995-12-12

Pham, Chi H.

Telecommunications

Transmitter and receiver at separate stations

455 341, 455 561, 455 62, 455 63, 379 59, H04B 726, H04Q 720

Patent

active

054758661

ABSTRACT:
Radio frequency reuse between two or more radio frequency communications systems is facilitated by having a beacon transmitter broadcast information globally throughout an area, which information identifies to users of a second system, which radio frequency resources are already in use by a first communications system. The global broadcast of information as to what channels are in use, permits users in the second system to avoid interfering use of those frequencies.

REFERENCES:
patent: 4790000 (1988-12-01), Kinoshita
patent: 5020130 (1991-05-01), Grube et al.
patent: 5193101 (1993-03-01), McDonald et al.
patent: 5276908 (1994-01-01), Koohgoli et al.

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