Multiplex communications – Wide area network – Packet switching
Patent
1982-11-23
1985-02-19
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 86, 370 94, 3408255, H04J 300
Patent
active
045009872
ABSTRACT:
In a loop transmission system in which packet communications are made among a plurality of transmission/reception terminals which are connected in a loop, a higher degree of priority is given to a real time signal packet, while a lower degree of priority is given to a data packet. A communication path in each terminal is controlled according to the degree of priority such that a packet having a higher degree of priority will not be delayed when it passes through the terminal. Further, a transmission request command signal having an intermediate degree of priority is sent for effecting a real time signal transmission as well as full dual communication. In a modified embodiment, a traffic quantity detector is provided for sending out a real time information message. In another modification, an activity control circuit is added for controlling sending out of the voice packet according to a detected traffic quantity.
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patent: 4156798 (1979-05-01), Doelz
patent: 4168400 (1979-09-01), de Couasnon et al.
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"Performance Evaluation of a Variable Frame Multiplexer for Integrating Switched Networks", IEEE Transactions on Communications, Jun. 1981, vol. COM-29, No. 6 by B. Maglaris and M. Schwartz.
"A Digital Loop Communication System", IEEE Transactions on Communications, vol. COM-22, No. 6, Jun. 1974, by E. R. Hafner.
Nippon Electric Co. Ltd.
Olms Douglas W.
Scutch III Frank M.
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