Multiplex communications – Wide area network – Packet switching
Patent
1988-09-29
1991-04-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 941, H04Q 1104
Patent
active
050070487
ABSTRACT:
For avoiding overload in a wideband switching system, in which the messages are subdivided into blocks and transmitted over wideband transmission links according to an asynchronous time-division multiplex method, it is known to arrange bidirectional counters assigned to the different subscribers in the switching nodes. By means of the count of the bidirectional counter it can be easily verified whether the maximum and mean transmission rates determined by the subscriber station are adhered to.
For avoiding overload and for charge-metering the switching node comprises two up-counters--in lieu of one bidirectional counter--for each subscriber station. This enables establishing both the duration of the connection and the number of blocks transmitted during this connection. From the ratio between the counts a criterion is derived to recognize overload.
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patent: 4443875 (1984-04-01), Blausten
patent: 4538030 (1985-08-01), Fossett et al.
patent: 4561090 (1985-12-01), Turner
patent: 4611322 (1986-09-01), Larson et al.
Y. S. Yeh et al, "The Knock-out Switch: A simple, modular architecture . . . " International Switching Symp., 3/19/87, vol. 3, pp. 801-808.
J. S. Turner, "New Directions in Communications" Proc. Intl. Seminar on Digital Communications, 3/11-13/86, Zurich, Switzerland, pp. 25-32.
Barschall Anne E.
Olms Douglas W.
U.S. Philips Corporation
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