Data transmission system

Details Data transmission system Data transmission system

1979-04-30

1982-09-28

Chin, Tommy P.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 56, 179 19, H04B 350

Patent

active

043522017

ABSTRACT:
A system for the transmission of data from a number of out-station transmitters to a central receiver over a communication line or channel in which each out-station transmitter has an associated timer and a detector which "listens" to the line or channel and enables the transmitter only in the absence of detected signals from the other transmitters on the line or channel. When enabled each transmitter transmits data over the line or channel under control of its associated timer for a time interval during which the other transmitters are inhibited. The time intervals commence from the start times which differ from each other by different random delays which are short compared with the timed intervals, so that upon initial switching on of the system one of the transmitters will always commence transmission, followed by all the other transmitters in sequence.

REFERENCES:
patent: 4145657 (1979-03-01), Hanni
patent: 4156112 (1979-05-01), Moreland

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