Implicit token media access protocol without collision detection

Details Implicit token media access protocol without collision detection Implicit token media access protocol without collision detection

1994-01-31

1996-07-09

Chin, Wellington

Multiplex communications

Wide area network

Packet switching

370 953, 3701001, H04L 522, H04J 306

Patent

active

055352120

ABSTRACT:
If a transceiver has a message to send during an idle medium condition, it transmits a jam pattern onto the medium for a predetermined time (based on maximum network propagation delay). If a transceiver detects a jamming pattern, it inhibits its own transmissions and waits for the next slot progression. If multiple transceivers begin jamming within a propagation delay of each other (within the network vulnerable time), their jamming transmissions will not destructively interfere with each other. When jamming ceases, all transceivers begin a slot progression. Thus, the end of the jamming period when all transceivers have finished jamming serves as a network-wide synchronization for the start of an implicit token slot progression.

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Werner Bux, "Token-Ring Local-Area Networks and Their Performance" Feb. 1989, Proceeding of The IEEE, vol. 77, No. 2.

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