ATM switching system which separates services classes and uses a

Details ATM switching system which separates services classes and uses a ATM switching system which separates services classes and uses a

1997-10-22

2000-05-23

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370366, 370388, 370413, 370236, H04L 1228, H04L 1256, H04L 1250, H04Q 1100

Patent

active

060672986

ABSTRACT:
An asynchronous transfer mode switching system including a core switch section (CS102) in an output buffer-type configuration which has an ATM switching function between high-rate input and output ports, an input buffer module section (IXB20) which multiplexes plural low-rate input line to the high-rate input port of the core switch section, and an output buffer module section (OXB30) which separates the output of a high-rate output port of the CS into plural low-rate output lines. The IBX enables queuing for each output line and each service class. The OXB enables queuing for output line and service class accommodated by itself. When the buffer occupancy exceeds a threshold value, the OXB originates a cell inhibiting signal to the CS. When the queue length for each output port exceeds a threshold value, the CS originates the cell inhibiting signal to all IXBs. The IXB controls to stop a cell transmission according to the cell inhibiting signal. An execution throughput is increased by suppressing occurrence of congestion inside an ATM exchange. The evenness of throughput is guaranteed between virtual channels using the same output line.

REFERENCES:
patent: 5583861 (1996-12-01), Holden
patent: 5838677 (1998-11-01), Kozaki et al.
patent: 5938749 (1999-08-01), Rusu et al.
R. Fan, et al., "Expandable ATOM Switch Architecture (XATOM) for ATM LANs", 1994 IEEE, pp. 402-409.

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