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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...
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...
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...
Provisioning QoS enabled VPN services over packet switched networks is increasingly important for service providers. Prior works usually adopted the proactive service admission approach, but little attention has been given to the control of QoS parameters after the service has been instantiated. This paper proposes a packet loss measurement and rate-based feedback control system that maintains preset...
When provisioning the quantitative QoS based VPN services over packet switched networks, parameters such as packet loss, delay and delay jitter, besides the required bandwidth, have to be guaranteed. While the bandwidth is easier to guarantee during the lifetime of a VPN service, maintaining a value of the loss parameter below a preset value presents serious difficulties. Thus one of the main issues...
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