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Experimental assessment of RED in wired/wireless networks

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Title Experimental assessment of RED in wired/wireless networks
 
Creator ZHANG, C
KHANNA, M
TSAOUSSIDIS V
 
Subject active queue management
wireless networks
tcp
 
Description The Internet is a heterogeneous environment comprising wired and wireless components, and transport protocols with different error recovery strategies. We use simulations to study the behaviour of random early detection (RED) gateways in such heterogeneous environments. We investigate two issues: (i) the performance trade-offs of the dropping policy of RED over Drop-Tail's, and (ii) the impact of RED's active queue management on more sophisticated protocols such as TCP-SACK. Some of our results indicate that RED does not deal adequately with heterogeneity. In particular, it may happen that RED applies congestion avoidance techniques even when wireless errors force some senders to back off prior to actual congestion. Our scenarios involve a non-monotonic transmission behaviour of transport protocols within one and the same congestion epoch; RED may escalate further bandwidth under-utilization by applying false congestion avoidance tactics. Furthermore, our results indicate that RFD's dropping policy of 'proportional' fairness, which is realized through a Send-more/Drop-more scheme, can also penalize sophisticated protocols like TCP-SACK, which attempt to recover more aggressively from wireless losses. In summary. our results call for further investigation of RED's efficiency in heterogeneous networks and naturally raise the concern of RED's compliance with the end-to-end argument. Copyright (C) 2004 John Wiley Sons. Ltd.
 
Publisher JOHN WILEY & SONS LTD
 
Date 2011-08-16T21:32:37Z
2011-12-26T12:55:09Z
2011-12-27T05:43:47Z
2011-08-16T21:32:37Z
2011-12-26T12:55:09Z
2011-12-27T05:43:47Z
2004
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, 17(4), 287-302
1074-5351
http://dx.doi.org/10.1002/dac.643
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9628
http://hdl.handle.net/10054/9628
 
Language en