Performance Evaluation of Adaptive AQM Algorithms in a Variable Bandwidth Network

Youquan ZHENG  Mingquan LU  Zhenming FENG  

IEICE TRANSACTIONS on Communications   Vol.E86-B   No.6   pp.2060-2067
Publication Date: 2003/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Internet
Internet,  congestion control,  active queue management (AQM),  variable bandwidth link,  bandwidth estimation,  

Full Text: PDF>>
Buy this Article

In this letter, we evaluate the performance of several adaptive and non-adaptive AQM schemes for congestion control in a dynamic network environment with variable bandwidth links. The AQM schemes examined are RED, BLUE, Adaptive RED, REM, AVQ and PI controller. We compare their queueing performance and show that none of them can derive stable queue length and low packet drop rate simultaneously in networks where both input traffic and available output bandwidth are time varying. Adaptive and efficient algorithms should be designed and applied in order to improve the adaptiveness and robustness of congestion control in dynamic networks such as Internet.