H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/71
H04L 7/00 (2006.01) H04L 12/28 (2006.01)
Patent
CA 1205883
ABSTRACT OF THE DISCLOSURE A multiple access digital communication system having fixed or variable length messages each separated into message groups, each group having messages numbered from 0 to N and in which there can optimally accommodated, on the same network a combination of both high and low duty cycle subscribers having short or long messages. The apparatus of the system includes a signal communication link comprising a two-way bus or two one-way buses, a plurality of subscriber devices, a plurality of network interface units respective ones of which couples each subscriber device to both the communication link. One of the network interface units at any one point in time is a pacer unit which sends a control message to allow all network interface units to track the number of the message on the network. Each of the network interface units in turn comprise a data processing means and means for transmitting a plurality of network messages including message segments designating such parameters as message number, destination address, and variable message length, and means for receiving the network messages including means for identifying such parameters as destination address and message number along with a means for storing the message length. In accordance with the invention operation is in accordance with multiple modes including those which permit either fixed or variable message length and which have either both or separate dedicated and contention assignments of message number. -71-
432770
Dahod Ashraf M.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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