Method of inverse multiplexing for atm

H - Electricity – 04 – B

Patent

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H04B 7/216 (2006.01) H04Q 11/04 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2362645

A method for flexible inverse multiplexing for ATM and for link grouping (106) of communication links (103, 104, 105) with different transmission rates and delay. The method of the present invention supports links which use a portion of the link bandwidth for one QoS objective (e.g., low delay) and another portion for another QoS objective (e.g., low cell loss). The method involves servicing each of a number of multiplexed flows (300) with a predetermined number of cells. Cells (309) are assigned to each flow (302, 304, 306) during a number of cycles which make up an ATM frame. The number of cells assigned to each flow during each cycle is dynamically adjusted based upon the requirements of each flow, and may be different for each flow. The number of cells assigned to each flow during each cycle may either be fixed, or may vary from cycle to cycle.

L'invention concerne un procédé de multiplexage inverse souple pour mode de transfert asynchrone (ATM) et pour le regroupement de liaisons de communication avec des débits de transmission et des retards différents. Le procédé de l'invention supporte des liaisons utilisant une partie de la largeur de bande de la liaison pour un objectif de qualité de service (QoS), tel qu'un faible retard, et une autre partie pour un autre objectif QoS (p.ex. faible perte de cellules). Ce procédé consiste à traiter chacun des flux multiplexés avec un nombre de cellules prédéterminé. Les cellules sont affectées à chaque flux au cours de plusieurs cycles constituant une séquence ATM. Le nombre de cellules affectées à chaque flux au cours de chaque cycle est ajusté dynamiquement selon les nécessités de chaque flux, et peut être différent pour chacun des flux. Le nombre de cellules affectées à chaque flux au cours de chaque cycle peut être fixe ou varier d'un cycle à l'autre.

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