QoS provisioning across a DiffServ domain using policy-based management

The differentiated services architecture has been proposed to offer quality of service in the Internet. Most works on DiffServ (DS) handles QoS guarantees in a per node basis, which assumes that assuring QoS in a single node also leads to the desired QoS in the entire DS domain. Nevertheless, this is not always true. This paper proposes a framework that offers QoS in a DS domain using policy-based management and fuzzy logic techniques. The QoS controller reconfigures all DS nodes according to ingress traffic and domain policies. Policy based management is used in this framework to provide QoS in the DS domain, controlling heterogeneous equipments of different manufacturers. The performance and functionalities of a prototype are shown by simulation of a voice over IP application in different DS topologies