Data communications loop synchronizer

Details Data communications loop synchronizer Data communications loop synchronizer

1975-05-29

1977-12-20

Pitts, Harold I.

Communications: electrical

Digital comparator systems

179 15AL, H04Q 1100

Patent

active

040644863

ABSTRACT:
A loop controller for a data communication network system formed by interconnecting a group of heterogeneous computers, batch terminals and conversational terminals in a ring or loop configuration. Each computer or terminal is connected to the communication network via a communications processor and an interface unit termed a node. The communications processor is responsible for network protocol and activities as well as for interfacing devices to the network. The node provides the only connection to the ring or loop and derives the clock for the communications processor as well as the node itself from the transmitted data. The logocontroller combines timing signals and information signals and forms a sequential stream of alternating control and data characters, each character being n-bits in length. This stream is then placed on the loop for serial transmission to the individual nodes connected to the loop. Signals received by the loop controller are synchronized for retransmission back to the loop.

REFERENCES:
patent: 3639694 (1972-02-01), Deutsch
patent: 3680056 (1972-07-01), Kropfl

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