Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Patent
1996-07-16
1998-09-29
Crosland, Donnie L.
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
455404, 455515, 455521, 340905, 340539, 364436, H04B 1700, G08G 109
Patent
active
058158022
ABSTRACT:
A traffic alert warning system and method is provided for transmitting a road condition message to operators of vehicles when the system determines that a frequency channel to be used in broadcasting the message is not being used. The traffic alert warning system includes an activity level monitoring circuit for measuring the communication activity of the frequency channel, a channel availability logic circuit for determining if the frequency channel is available for transmission, a storage unit for storing a road condition message, and a transmitter assembly for transmitting the road condition message.
REFERENCES:
patent: 3710313 (1973-01-01), Kimball et al.
patent: 3760349 (1973-09-01), Keister et al.
patent: 4013994 (1977-03-01), Ragano et al.
patent: 4056779 (1977-11-01), Toler
patent: 4335468 (1982-06-01), Foster et al.
patent: 4352201 (1982-09-01), Miller
patent: 4764978 (1988-08-01), Argo
Crosland Donnie L.
Highway Technologies, Inc.
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