Communications: electrical – Continuously variable indicating – With meter reading
Patent
1981-04-20
1983-10-11
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
370 94, 178 3, H04Q 900
Patent
active
044095929
ABSTRACT:
In a data communications systems having a communications channel (3) for interconnecting a plurality of transceivers (1) and (2), each of said transceivers (1) and (2) including means (80) for transmitting a signal having transitions, there is provided a means (20) responsive to the presence and absence of a signal on said communications channel (3) during a transition of a signal transmitted by said transmitting means (80) for providing a collision detected (CD) signal if there is destructive interference with the transmitted signal on said communication channel (3) during a transition of said transmitted signal and means (48) responsive to said CD signal for terminating said transmitting of said signal. In the event the channel (3) is busy prior to a transmission from the transmitter (80) there is provided a carrier sense circuit (14) for indicating the channel is busy and a non-persistent control circuit (45) and a random number generator (90a) and a delay circuit (90b) responsive to the carrier sense circuit (14) and the collision detector circuit (20) for interrupting and delaying the transmitting of each of the transceivers (1) and (2) for a random period of time.
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"Random Access Techniques for Data Transmission over Packet Switched Radio Networks," F. A. Tobagi, Ph.D. Dissertation, Dec. 1974, School of Engineering and Applied Science, University of California, Los Angeles, Calif., 90024, pp. 1-283.
Becker Warren M.
Yusko Donald J.
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