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Delivering desired QoS to the applications is one of the most important challenges in next generation networks. Designing efficient queue management in midway nodes leads to improvement in NGN efficiency. This paper presents fair Efficient active Queue Management (EQM) mechanism for congestion avoidance and control in next generation networks. Proposed AQM mechanism uses instantaneous queue length...
Detection of congestion plays a key role in numerous networking protocols, including those driving active queue management (AQM) methods used in congestion control in Internet routers. This paper exploits the rich theory of statistical detection theory to develop simple detection mechanisms that can further enhance current AQM methods. The detection of congestion is performed using a maximum-likelihood...
Nowadays congestion control problem of the intermediate nodes in the Internet has received extensively attention in networking and control community. In this paper, a novel adaptive PID (Proportional-Integral-Differential) controller based on neural networks for the problem of AQM with ECN marks is presented. Considering a previously developed nonlinear dynamic model of TCP/AQM system and the queue...
With the increasing number of media flows using UDP in IP networks there is a strong need to enable fairness between UDP and TCP traffic. The TCP traffic will suffer because of the unresponsiveness of UDP to congestion in the IP network. To enable responsiveness of UDP traffic, the TCP-friendly rate control (TFRC) protocol can be used. With the coexistence of TCP and UDP, where the rate adaptation...
Design of a novel active queue management (AQM) scheme to support distributed multimedia flows is discussed. An analysis is done for reducing the loss rates of such flows. Most of the existing AQM schemes consider TCP and TCP-friendly flows, which result in unexpected congestion when multimedia flows compete with them. This AQM uses a pushout scheme to support higher priority multimedia flows that...
In order to preserve quality of service (QoS) in a computer network, implementation of traffic engineering (TE) techniques is critical to meet congestion control. In this paper a systematic control strategy based on discrete time sliding mode control considering the dynamics of the window based TCP flow is proposed. Robustness of the designed controller against disturbance and delay variations has...
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