Multiplex communications – Wide area network – Packet switching
Patent
1987-06-08
1989-04-04
Griffin, Robert L.
Multiplex communications
Wide area network
Packet switching
370 58, 370 89, H04Q 1100, H04Q 1104
Patent
active
RE0329002
ABSTRACT:
A fast circuit switching system that establishes a circuit for each packet-sized data communication. Information is conveyed from a number of communications modules in source channels to a number of port controllers and to a network. Information is conveyed from the network to destination channels. Each communications module includes a transmitter that transmits in an associated source channel, circuit setup request signals defining destination channels and also transmits data. Each port controller stores one of a number of status words defining the availability of the destination channels and each of these status words is cycled to each port controller. A port controller responds to one of the circuit setup request signals and to subsequent data, when one of the status words cycled thereto defines as available, a destination channel defined by the circuit setup request signal, by transmitting the circuit setup request signal and the subsequent data to the network. The network responds to circuit setup request signals received from the port controllers by transmitting data received from the port controllers to the destination channels defined by those circuit setup request signals.
REFERENCES:
patent: 3956593 (1976-05-01), Collins et al.
patent: 4005272 (1977-01-01), Collins et al.
patent: 4038497 (1977-07-01), Collins et al.
patent: 4123624 (1978-10-01), Gagnier et al.
patent: 4201889 (1980-05-01), Lawrence et al.
patent: 4201890 (1980-05-01), Lawrence et al.
patent: 4201891 (1980-05-01), Lawrence et al.
patent: 4383315 (1983-05-01), Torng
patent: 4392221 (1983-07-01), Hesketh
patent: 4680757 (1987-07-01), Murakami et al.
"Pulse Code Modulation Tandem Exchange Field Trial Model", by D. J. Rose, Electrical Communication, vol. 46, No. 4, 1971.
"A Review of Classification Schemes for Computer Communication Networks", by William Greene, Computer, Nov. 1977, reprinted in Tutorial: Distributed Processor Communication Architecture, by Kenneth J. Thurber, pp. 135-144.
International Switching Symposium, May 7-11, 1979, paper 20B3, pp. 246-252, Paris (FR) Araki et al.: "The KD 250 M telex and data switching system", see pp. 247-249, paragraph 3.
International Switching Symposium, May 7-11, 1979, paper 40C2, pp. 834-839, Paris (FR), Doret: "A nodal structure switching network", see p. 837, paragraph 4.
National Telecommunications Conference, 11/29/81-12/3/81, paper D.5.1, pp. 1-5, New Orleans (U.S.), Motoyama et al.: "A subscriber loop multiplexing system for integrated service digital networks", see pp. 2 and 3, paragraph III.
"Performance Evaluation of a Distributed Burst-Switched Communications System", by James D. Morse and Stanley J. Kopec, Jr., Conference Proceedings, Phoenix Conference on Computers and Communications, Mar. 1983, pp. 41-46.
American Telephone and Telegraph Company AT&T Bell Laboratories
Griffin Robert L.
Scutch III Frank M.
Watland Ross T.
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