Method for determining the required bit rate for a number of...

H - Electricity – 04 – L

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H04L 12/24 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2322794

The invention relates to a method for controlling the acceptance or refusal of a new connection on an ATM communications device having a maximal capacity R max which already handles a plurality M of connections that can be statistically multiplexed, whereby the new connection has a peak cell rate PCR and a sustainable average cell rate SCR. The inventive method comprises the following steps: Determining the sum P M+1 = .SIGMA.PCR1 of the peak cell rate PCR, the sum S M+1-.SIGMA.SCR1 of the sustainable cell rate SCR of the M existing connections, and the new connection; determining the variance V of the cell rates of the M+1 connections; determining the required capacity load M+1 for the M connections according to P M, S M and V, and; accepting the connection in the case when load M+1 is less than or equal to R max. The connection acceptance control can be carried out faster, more effectively and independent of the sequence of accepted connections by the exact calculation of the required capacity of the communications connections.

L'invention concerne un procédé pour la commande de l'acceptation ou du refus d'une nouvelle liaison sur un système de transmission MTA disposant d'une capacité maximale Rmax et traitant déjà une pluralité M de liaisons à multiplexage statistique, la nouvelle liaison présentant une vitesse maximale des cellules (PCR) et une vitesse moyenne des cellules (SCR). Ce procédé consiste à déterminer la somme Pm+1= SIGMA SPCRi de la vitesse maximale des cellules (PCR) et la somme SM+1= SIGMA SCRi de la vitesse moyenne des cellules (SCR) des liaisons existantes (M) et de la nouvelle liaison, à déterminer la variance (V) des vitesses des cellules des liaisons M+1, à déterminer la capacité de chargeM+1 nécessaire pour les M liaisons en fonction de PM, SM et V, et à accepter la liaison au cas où la chargeM+1 est inférieure ou égale à Rmax. Le calcul exact de la capacité nécessaire pour les liaisons de transmission permet d'exécuter la commande d'acceptation de la liaison plus rapidement et plus efficacement et indépendamment de la séquence des liaisons acceptées.

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