Multiplex communications – Wide area network – Packet switching
Patent
1994-02-25
1995-07-25
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3701001, H04J 306
Patent
active
054369010
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 end of the jamming pattern. 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 time slice 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 time slice progression.
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Nguyen Chau T.
Olms Douglas W.
Otis Elevator Company
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