Multiplex communications – Wide area network – Packet switching
Patent
1988-05-02
1990-01-02
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
3408258, H04J 326
Patent
active
048918024
ABSTRACT:
In a switching system, more specifically a packet switching system, the flow control of the packets can be established by way of a datagram or by implementing the method of the virtual connection. For the optimization of the flow control the selected structure of the switching network is especially important.
If the switching network is designed along the lines of a space-division multiplex switching network, each junction point of the bus bar system consisting of feeder lines and trunk lines has a comparator assigned thereto, which compares the addresses of the trunk lines arranged in columns with the routing information contained in the packet message headers. If, simultaneously, several of the auxiliary lines arranged in rows are to be connected through to one of the trunk lines arranged in a column, the order is determined by means of a decision circuit associated to each trunk line. If the order is determined by the spatial arrangement of the feeder lines, each decision circuit cyclically scans all comparators associated thereto, so that a new evaluation of the routing information is not achieved until the complete cycle has finished.
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T. A. Coudreuse, "Asynchronous Time-Division Techniques: An Experimental Packet Network Integrating Videocommunication", ISS '84, (XI International Switching Symposium, Florence (Italy), May 7-11, 1984), vol. 3, Session 32C, paper 2, pp. 1-7.
Jasmer Wolfgang E.
Killat Ulrich R. P.
Kruger Johann E. W.
Barschall Anne E.
Briody Thomas A.
Haken Jack E.
Marcelo Melvin
Olms Douglas W.
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