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Weighted fair queueing (WFQ) is a practical scheduling discipline for supporting differentiated quality-of-service (QoS) in computer networks and communication systems. Analytical models are important tools for system performance evaluation and resource optimization. However, there is not any comprehensive model reported in the open literature for analytically investigating the performance behaviors...
The provisioning of differentiated QoS is an important objective in the design and implementation of IEEE 802.16 / WiMAX-based broadband wireless networks. To this end, the hybrid scheduling mechanism that combines various fundamental scheduling principles, e.g., priority queueing (PQ), earliest deadline first (EDF), weight fair queue (WFQ), and round robin(RR) within a hierarchical structure for...
This paper presents an original analytical model for a finite buffer queueing system with active queue management (AQM) where the dynamic channel conditions are captured by Markov-modulated Poisson processes. The model derives the close-form expressions of performance metrics including the mean number of packets in the system and in the queue, throughput, response time, delay, packet loss probability...
Active queue management (AQM) coupled with differentiated scheduling mechanism is an important and promising scheme for congestion control and quality-of-service (QoS) guarantee in communication networks. This paper develops a new analytical performance model for priority-based AQM subject to heterogeneous bursty traffic modelled by Markov-modulated Poisson processes (MMPP) and non-bursty traffic...
Traffic loads have a significant impact on the performance of routing algorithms. Many analytical models for adaptive routing in interconnection networks have been reported. However, most existing studies are based on the assumption that the arrivals of traffic follow a non-bursty Poisson process and the message destinations are uniformly distributed over the network. With the aim of obtaining a deep...
This paper develops an analytical performance model for a finite capacity queueing system with an enhanced random early detection (RED) congestion control scheme in the presence of differentiated classes of bursty traffic. The aggregate traffic is captured by the superposition of 2-state Markov modulated Poisson processes (MMPP). Two individual thresholds are assigned to each traffic class in order...
Active queue management (AQM) with multiple thresholds is an effective mechanism of buffer allocation for differentiated quality-of-service (QoS) of heterogeneous traffic. This paper develops an original analytical model for a finite buffer queueing system with AQM under two heterogeneous classes of traffic which are modeled, respectively, by the non-bursty Poisson process and bursty Markov-modulated...
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