Method and device for controlling a switching network

Multiplex communications – Wide area network – Packet switching

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370 54, H04Q 1104

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active

044956150

ABSTRACT:
Method and device for controlling a TST-switching network. The control device (5) controls the network in such a way that in one frame period in each of the .lambda. internal time slots the (n x n)-switching matrix (6) is set according to the switching pattern of an (n x n)-permutation matrix, so that in each time slot always n switching paths between the input buffer (3 or 4) and the output buffer (7 or 8) are set up in parallel. Consequently, the network is free from blockings for at most n x .lambda. switching paths.

REFERENCES:
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patent: 4317193 (1982-02-01), Joel
patent: 4456987 (1984-06-01), Wirsing
Opferman, D. C. and Tsao-Wu, N. T.; "On a Class of Rearrangeable Switching Networks--Part I: Control Algorithm," The Bell System Technical Journal, vol. 50, No. 5, May-Jun. 1971, pp. 1578-1600.
Opferman, D. C. and Tsao-Wu, N. T.; "On a Class of Rearrangeable Switching Networks--Part II: Enumeration Studies and Fault Diagnosis," The Bell System Technical Journal, vol. 50, No. 5, May-Jun., 1971, pp. 1601-1618.
Philip, A. S., "The System X Digital Switching Subsystem (DSS)," Plessey Telecommunications Systems, Poole, pp. 5-19.
Alles, H. G., "An Intelligent Network Processor for a Digital Central Office," Bell Laboratories, Murray Hill, NJ 07974.
Rose, D. J., "PCM Tandem Switching Field Trial in the U.K.," Standard Telephones and Cables Limited. Institute of Electrical and Electronics Engineers. International Switching Symposium Record, Cambridge, MA, Jun. 6-9, 1972.
McAuliffe, D. J. and Hagstrom, K. L., "Microprocessor Applications in Communications Switching," 1976 National Telecommunications Conference, Nov. 29-30 and Dec. 1, 1976, Dallas, TX.
Telefonaktiebolaget LM Ericsson, "SPC Switching System for Local Transit and Combined Telephone Exchanges Axe 10--System Survey," Stockholm, Sweden.

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