METHOD FOR DYNAMIC OPTIMISATION OF SERVICE QUALITY IN A DATA TRANSMISSION NETWORK

摘要

The invention concerns a method for dynamically optimising service quality in a packet mode data transmission network (2), said network (2) comprising a plurality of sources Si and a plurality of destinations Di connected to a transit network (4) via a plurality of access networks (6), each source being capable of sending a maximal rate Lmax,s,x, and each destination being capable of receiving a maximal rate Lmax,x,d, said sources comprising each means classifying (8) and controlling (10) the transmitted data rate. The method is characterised in that it comprises the following steps: measuring the absolute transfer delay, the jitter, the rate of said exchanged data and the losses between each source S and each destination D; and performing the following sub-steps on the basis of the measurements obtained in step a: a1) for each destination D, distributing the maximal rate Lmax,x,d between the different sources; a2) for each destination D, dynamically determining the limit of the access network (6) congestion point optimising the maximal rate Lmax,x,d; a3) for each source S, dynamically determining the limit of the access network (6) congestion point optimising the global maximal rate Lmax,s,d and the maximal rate to each destination Lmax,s,d; a4) for each source S, determining the effect of the transit network (4) congestion; and b) controlling the means classifying (8) and controlling (10) rate in accordance with the results of sub-steps a1, a2, a3 and a4.