Reliable broadcast protocol for a token passing bus network

Details Reliable broadcast protocol for a token passing bus network Reliable broadcast protocol for a token passing bus network

1987-05-28

1988-02-16

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

370 85, H04Q 100

Patent

active

047258349

ABSTRACT:
A system, station apparatus and protocol for broadcasting messages to a plurality of stations which contemplate a primary receiver, also called a token site. The primary receiver is adapted to receive and store information messages transmitted from a source station to a broadcast group stations. The source continues to retransmit the broadcast message until it receives an acknowledgment control message from the primary receiver. In the event some receiver or receivers in the broadcast group do not receive the broadcast message, such receiver or receivers could request a retransmission of the message. The primary receiver, not the source station, would retransmit the broadcast message, thereby assuring a reliable broadcast system. The token site function can be rotated among the various receivers in the broadcast group to reduce storage costs. The possible token sites are identified in a token list to which stations may be added or from which stations may be deleted. The token list is transmitted to all stations in the broadcast group to assure that no more than one token site exists at any instant of time.

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IEEE Transactions on Communications, vol. Com-28, No. 4, Apr. 1980, "Multiaccess Protocols in Packet Communication Systems", by Fouad A. Tobagi, pp. 468-488.
IEEE International Conference on Communications, Jun. 13, 1987, "Cablenet: A Local Area Network", by Isaac (Zak) Kong, pp. 6C2.1-6C2.5.
David D. Clark et al., "An Introduction to Local Area Network", Proceedings of the IEEE, Nov. 1978, pp. 1497-1517.

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