Communications: electrical – External condition vehicle-mounted indicator or alarm – Highway information
Patent
1996-07-05
1998-07-21
Mullen, Jr., Thomas J.
Communications: electrical
External condition vehicle-mounted indicator or alarm
Highway information
340928, 340947, 375240, 375241, 455 25, 455 72, G08G 109
Patent
active
057840067
ABSTRACT:
A system for annunciating traffic information includes a plurality of stationary transmitters (42,46) for generating relatively short range, highly directional beam signals (44,48) containing a burst data stream signal (10) to each of a plurality of mobile receivers (50,52,54). The stationary transmitter (42) includes a transmitter (42a) connected to a transmitter antenna (56) for generating the beam signal (44) and to a transmitter control (60) which is connected to a transmitter memory (68) for storing a plurality of compressed data voice messages which are read by the transmitter control and generated as data packet signals (16,20,22) in the burst data stream signal (10). The mobile receiver (54) includes a receiver antenna (58) for receiving the beam signal (44), a receiver (54a) for separating the burst data stream signal (10) from the beam signal, a receiver control (70) for reading the data packet signals, a data decompression circuit (72) for decompressing the data packet signals and an audio playback device (78) for audibly reproducing the messages. A traffic signal (36) connected to the transmitter control (60) generates traffic signal state signals which are generated as status flag signals (14,28) in the burst data stream signal (10) and the receiver control (70) responds to the status flag signals by generating a traffic signal state indication from an output device (80).
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Mullen Jr. Thomas J.
Wu Daniel J.
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