Communication system for transmitting synchronous and asynchrono

Details Communication system for transmitting synchronous and asynchrono Communication system for transmitting synchronous and asynchrono

1990-08-13

1992-12-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 601, H04J 304

Patent

active

051739011

ABSTRACT:
In this system STM (Synchronous Transfer Mode) and ATM (Asynchronous Transfer Mode) cell streams are supplied to corresponding STM and ATM switching exchanges STME and ATME via the cascade connection of a multiplexer (MUX), a transmission link (LI) and a demultiplexer (DMUX). The MUX and DMUX are each constituted by a switching element with a plurality of inputs (II/2; I3) and outputs (03, 04/5) coupled to a common switching means (SB1, TM1; SB2, TM2) via respective receiver (RC1/3) and transmitter (TC1/3) circuits. The common switching means samples the input cell streams at a frequency at least equal to the sum of the time slot frequencies of the time frames of the input cell streams. The time frames of the input and output cell streams are phase synchronous and the sampling of the input cell streams is performed in a predetermined order. The cells of the resultant (STM/ATM) cell stream are supplied to the transmitter circuits in function of their destination.

REFERENCES:
patent: 4813037 (1989-03-01), Debuysscher et al.
patent: 4922487 (1990-04-01), Eilenberger et al.
patent: 4926416 (1990-05-01), Weik et al.
patent: 4965790 (1990-10-01), Nishino et al.
patent: 4969149 (1990-11-01), Killot et al.
"ISDN Field Trials in the Belgian, Italian, and Spanish Networks", Electrical Communications, vol. 59, No. 1/2, 1985.
"Prelude: An Asynchronous Time-Division Switched Network", J. Coudreuse et al., Proceedings IEEE Int'l Conf. on Communications 1987, pp. 769-773.
"Dynamic TDM--A Packet Approach to Broadband Networking", L. T. Wu et al., Proceedings IEEE Int'Conf. on Communications 1987, vol. 3, pp. 1585-1592.

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