ATM local area network switch with dual queues

Details ATM local area network switch with dual queues ATM local area network switch with dual queues

1996-05-10

1998-03-24

Kizou, Hassan

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370417, 370418, H04L 1256

Patent

active

057320870

ABSTRACT:
A switch for digital communication networks includes a queuing system cape of implementing a broad class of scheduling algorithms for many different applications and purposes, with the queuing system including both a tag-based primary queue which contain ATM cells organized by priority and a secondary queue which contains ATM cells which are not yet scheduled for transmission and which are organized by virtual channel. A queuing decision module is provided to determine in which queue an incoming ATM cell should be deposited. A requeuing module operates when an event occurs that unblocks a particular virtual channel. The requeuing module, on occurrence of such an event, accesses the secondary queue to obtain another cell, to assign it priority and to move it to the primary queue. The queuing decision module, along with a virtual channel table, can be used easily to block virtual channels when necessary. The combination of queues also allows for round robin scheduling.

REFERENCES:
patent: 4603416 (1986-07-01), Servel et al.
patent: 4939720 (1990-07-01), Bakka
patent: 5166930 (1992-11-01), Braff et al.
patent: 5233603 (1993-08-01), Takeuchi et al.
patent: 5455825 (1995-10-01), Lauer et al.

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