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Traditionally, IP networks offer a single, best effort class-of-service. In order to support multiple services, the converged IP network must provide Quality of Service (QoS). One of the most difficult QoS areas is named as congestion avoidance. Today??s router implementations depend solely on RED or lately WRED (Weighted Random Early Detection) for this function. However, two attributes minimize...
Differentiated services (DiffServ) define the per-hop-behavior (PHB) to enable scalable network designs with QoS support for multiple classes. MPLS traffic engineering (MPLS TE) enables resource reservation, fault-tolerance, and optimization of network resources. From the implementation point of view, the QoS is provided on the forwarding plane while the reservation and admission control happen on...
It is a trend that the integrated voice, video and data will be transported in the converged IP/MPLS core network. The combined use of the differentiated services (DiffServ) and multiprotocol label switching (MPLS) technologies is envisioned to provide guaranteed quality of service (QoS). However, such a scheme only dictates per hop behavior (PHB) and it does not control the end to end path the traffic...
As networks, services and applications converge on a common IP/MPLS backbone, carriers must manage traffic flows in a scalable way with very granular and stringent QoS requirements. In this paper, a control theory approached quantitative QoS control framework is proposed in a distributed and scalable architecture, which assembles the author's previous studies in a complete solution. The dynamic control...
QoS control and guarantees for IP/MPLS VPN services are increasingly important for network service providers. The dynamic control of QoS parameters is still an open issue. A control theory based packet loss control system is proposed to dynamic maintain the preset packet loss probability targets for instantiated VPN services in the core network, where the transducer and the dynamic packet loss model...
With the increasing deployment of IP/MPLS VPN services their QoS control mechanisms on the core network have been extensively studied in the literature. Unfortunately, satisfying requirements of QoS in VPN access links is missing, where lots of small and medium businesses (SMB) or future home networks usually purchase a fixed and limited bandwidth connection to the external network. When more and...
Provisioning QoS enabled MPLS VPN services in IP networks has attracted a lot of attention due to the high return on investment (ROI). In spite of considerable research effort, no practical solution to this problem has been found. One of the main issues to be solved is to estimate the packet loss probability (PLP) accurately and effectively based on the input stochastic traffic process. Inspired by...
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