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Abstract:The Differentiated Service Architecture (DiffServ) is currently a popular research topic as a lowcost method to provide Quality of Service to the different applications in the Internet. This paper addresses the definition and deployment of specific network services in a DiffServ environment. The proposed network services are described, while our main focus is the real-time delay-sensitive applications such as voice and video.The corresponding services for those applications are further analyzed and simulated. The analysis includes the influence of different algorithms that could implement the corresponding services for voice and video as well as the QoS performance under these algorithms. Sim ulation outcomes prove that the fundamental principles of the network services are fulfilled and provide an evaluation of the proposed algorithms.

Abstract-Internet is widely known for lacking any kind of mechanism for the provisioning of Quality of Service guarantees. An overlay Resource Control Management Layer on top of a Differentiated Services core network is introduced for managing and adjusting the resources among network elements. This layer realises an algorithm which provides a dynamic approach for resource distribution. Our experimental results show that this algorithm can allocate network resources according to traffic load and provide an adaptive and efficient way for re-distributing the resources among metwork elements.

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