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Journal of Computer Networks and Communications
Volume 2012 (2012), Article ID 859694, 13 pages
Research Article

Class-Based Weighted Fair Queuing Scheduling on Dual-Priority Delta Networks

1Department of Computer Science and Technology, University of Peloponnese, 22100 Tripolis, Greece
2Technological Educational Institute of Epirus, 47100 Arta, Greece

Received 28 October 2011; Accepted 23 January 2012

Academic Editor: Maode Ma

Copyright © 2012 D. C. Vasiliadis et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Contemporary networks accommodate handling of multiple priorities, aiming to provide suitable QoS levels to different traffic classes. In the presence of multiple priorities, a scheduling algorithm is employed to select each time the next packet to transmit over the data link. Class-based Weighted Fair Queuing (CBWFQ) scheduling and its variations is widely used as a scheduling technique, since it is easy to implement and prevents the low-priority queues from being completely neglected during periods of high-priority traffic. By using this scheduling, low-priority queues have the opportunity to transmit packets even though the high-priority queues are not empty. In this work, the modeling, analysis and performance evaluation of a single-buffered, dual-priority multistage interconnection network (MIN) operating under the CBWFQ scheduling policy is presented. Performance evaluation is conducted through simulation, and the performance measures obtained can be valuable assets for MIN designers, in order to minimize the overall deployment costs and delivering efficient systems.