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Journal of Electrical and Computer Engineering
Volume 2010, Article ID 379652, 10 pages
Research Article

Pricing and Unresponsive Flows Purging for Global Rate Enhancement

1Intelligent and Distributed Systems Laboratory, Liverpool Hope University, Liverpool L16 9JD, UK
2Centre for Intelligent Monitoring Systems, University of Liverpool, Liverpool L69 3BX, UK

Received 17 November 2009; Revised 13 March 2010; Accepted 27 March 2010

Academic Editor: Petri Mähönen

Copyright © 2010 G. Abbas 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.


Pricing-based Active Queue Management (AQM), such as Random Exponential Marking (REM), outperforms other probabilistic counterpart techniques, like Random Early Detection (RED), in terms of both high utilization and negligible loss and delay. However, the pricing-based protocols do not take account of unresponsive flows that can significantly alter the subsequent rate allocation. This letter presents Purge (Pricing and Un-Responsive flows purging for Global rate Enhancement) that extends the REM framework to regulate unresponsive flows. We show that Purge is effective at providing fairness and requires small memory and low-complexity operations.