Multiplex communications – Wide area network – Packet switching
Patent
1979-04-17
1980-11-25
Stewart, David L.
Multiplex communications
Wide area network
Packet switching
370 82, 370 89, H04J 602
Patent
active
042362458
ABSTRACT:
Communication between a plurality of data terminals (101(1) to 101(b)) serially interconnected with a main terminal (102) is provided by data frames or packets having a data portion for accommodating a burst of data preceeded by a header portion for accommodating address data followed by an empty/full "flag" bit indicating whether the addressee station has withdrawn the data burst. If a terminal has a data burst to send, it locates an empty packet, inserts the addressee designation in the packet subsequent to any prior address that the packet might contain, interposes delay in the passage therethrough of the packet so that the duration is increased to accommodate the new address and overwrites the data burst into the data portion. The main terminal detects when the data burst is withdrawn and signals the originating terminal to remove the data delay.
REFERENCES:
patent: 3680056 (1972-07-01), Kropfl
patent: 4011545 (1977-03-01), Nadir
patent: 4071706 (1978-01-01), Warren
patent: 4154983 (1979-05-01), Pedersen
Bell System Technical Journal, vol. 51, No. 6, Jul.-Aug. 1972; "Network for Block Switching of Data" by Pierce; pp. 1133-1145.
Freeny Stanley L.
Larsen Arthur B.
Pedersen Thomas J.
Bell Telephone Laboratories Incorporated
Lipton Roy C.
Stewart David L.
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