This article presents a modular scheduler with powerful semantics able to differentiate simultaneously multiple QoS metrics in classbased IP networks. In opposition to traditional scheduling mechanisms, this scheduler encompasses rate, loss and delay differentiation capabilities in a flexible way. This behaviour stems from new relative and mixed differentiation models able to bound QoS parameters on high sensitive traffic classes. The results show that usingsimple and intuitive configuration procedures the proposed architecture is able to provide enhanced QoS differentiation behavior inIP networks according to the users and applications needs. In this way, this proposal is an useful contribution to system designers and network engineers aiming at simple, intuitive, easy to configure and effective mechanisms to enhance QoS in IP networks.
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