Shared data transmission system

Details Shared data transmission system Shared data transmission system

1985-01-22

1987-10-06

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

3408255, 370 82, 370 94, H04J 308, H04J 324

Patent

active

046988041

ABSTRACT:
A digital transmission system includes a plurality of stations sharing a common transmission line. Variable length messages, set off by flags, are exchanged between pairs of stations. While a message is being received, the downstream portion of the transmission line is segmented to permit simultaneous use by another station pair. If a message is received from an upstream station while a message is being transmitted downstream, an abort message flag terminates the transmitted message abruptly to permit flowthrough of the received message. When any station is not in use or out of order, it is bypassed to permit use of the transmission line by the rest of the stations.

REFERENCES:
patent: 4225753 (1980-09-01), Chown et al.
patent: 4439763 (1984-03-01), Limb
patent: 4500987 (1985-02-01), Hasegawa
patent: 4514841 (1985-04-01), Sandberg
patent: 4519068 (1985-05-01), Krebs et al.
patent: 4566097 (1986-01-01), Bederman
patent: 4567590 (1986-01-01), Bederman
patent: 4637014 (1987-01-01), Bell et al.

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