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This paper presents an overview of the current service delivery models that exist in the Internet, covering also the motivation that triggered the introduction of each model separately. Different Quality of Service (QoS) frameworks like Integrated Services (IntServ), Differentiated Services (DiffServ) and Multiprotocol Label Switching (MPLS) are presented taking into consideration also the alteration...
Service providers have been in the process of evaluating and evolving their multiple networks to a single converged Internet Protocol (IP)-based infrastructure upon which they will deploy existing and future services. Although many approaches have been proposed, provisioning of Quality of Service (QoS) in the IP-based networks is still a challenging task. From the evolution of QoS solutions, Differentiated...
This article proposes a new model to ensure for each application a better quality of service (QoS). The proposed model is called periodic multi-step routing model or PEMS. It is built by integration of traffic engineering based on MPLS and differentiation of traffic depending on the class as proposed by DiffServ. Indeed, many models for optimizing QoS routing use a single specific metric because mixing...
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