Controle PID Híbrido e Dinâmico de QoS Baseado em Políticas para Ambiente DiffServ

Abstract

Converged IP-based networks and services, as well the huge increase in IP traffic along the last few years, have revealed the need for new dynamic mechanisms capable of handling all types of IP-based multimedia traffic. This work presents a dynamic, nonlinear controller, that adapt the weights of WFQ scheduling in a DiffServ architecture to maintain the QoS levels of the isochronous multimedia’s applications, even under conditions of severe congestion and large load variation on the network. The results presented here show that our objective is accomplished with the correct fitting of the WFQ parameters without overestimating their weights.