Time synchronization of control networks

Details Time synchronization of control networks Time synchronization of control networks

1989-02-24

1990-07-03

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

3701001, 34082514, H04L 704

Patent

active

049397532

ABSTRACT:
A distributed computer network is synchronized as to time provided to each peerway and its associated stations or nodes. Highway interface adapters (HIAs) serve as time references for each node on a peerway and as communication links between peerways. At periodic intervals, each HIA transmits a Time Interval Control packet (TIC) including the time of day and an ordinal number denoting the HIA priority in the network and a distance factor. By comparing ordinal numbers, an HIA will adjust its clock to the TIC packet being transmitted from the HIA with the highest priority and the smallest distance. This ensures that a synchronized time is provided to each node on the network from a single source over an optimal distance.

REFERENCES:
patent: 4276643 (1981-06-01), Laprie et al.
patent: 4390984 (1983-06-01), Sugiura et al.
patent: 4551833 (1985-11-01), Turner
patent: 4763329 (1988-08-01), Green
patent: 4797881 (1989-01-01), Ben-Artzi

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