Token ring with secondary transmit opportunities

Details Token ring with secondary transmit opportunities Token ring with secondary transmit opportunities

1983-12-23

1986-01-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 86, 370 90, 3408255, H04J 316, H04J 300

Patent

active

045660972

ABSTRACT:
Stations on a token ring network use a "Secondary Transmit Opportunity" protocol to transmit information onto the ring. According to the protocol a ring station detecting an idle character immediately following an abort sequence or a physical trailer sequence on the ring may insert a message. Simultaneously, the ring station monitors an input bit stream to detect messages and tokens from upstream stations. If this condition is detected, the station aborts or continues transmission in accordance with a predefined message priority algorithm.

REFERENCES:
patent: 3863220 (1975-01-01), Osawa et al.
patent: 4295122 (1981-10-01), Hatada et al.
patent: 4335426 (1982-06-01), Maxwell et al.
patent: 4373183 (1983-02-01), Means et al.
Julius-burger, "Multi-Peer Access Loop Communication System," 3/80.
Bux et al., "A Reliable Token-Ring for Local-Area Communication," 1981.

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