H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/84
H04L 5/14 (2006.01) H04L 12/417 (2006.01) H04L 12/56 (2006.01)
Patent
CA 1226917
ABSTRACT OF THE INVENTION The present invention relates to a data transmission system wherein a central station having a plurality of router elements exchanges data via a bus which is operatively connected to each router element. Further, each router element is connected to a next adjacent router element via a plurality of parallel lines forming a ring configuration. Each router element transmits a control message around the ring indicating availability to receive data. As the control message is transmitted around the ring each router element can examine the control message and indicate that data will be transmitted to it during the next cycle. Once a control message is accepted, no other router element around the ring can accept the control message during that cycle. Simultaneously with the transfer of the control message around the ring during the cycle, data is transferred on the bus as indicated by the control message of the pevious cycle.
476722
Honeywell Inc.
Smart & Biggar
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