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dc.contributor.authorGuo, Liangen_US
dc.contributor.authorMatta, Ibrahimen_US
dc.date.accessioned2011-10-20T04:42:35Z
dc.date.available2011-10-20T04:42:35Z
dc.date.issued2001en_US
dc.identifier.urihttps://hdl.handle.net/2144/1626
dc.description.abstractRecent measurement based studies reveal that most of the Internet connections are short in terms of the amount of traffic they carry (mice), while a small fraction of the connections are carrying a large portion of the traffic (elephants). A careful study of the TCP protocol shows that without help from an Active Queue Management (AQM) policy, short connections tend to lose to long connections in their competition for bandwidth. This is because short connections do not gain detailed knowledge of the network state, and therefore they are doomed to be less competitive due to the conservative nature of the TCP congestion control algorithm. Inspired by the Differentiated Services (Diffserv) architecture, we propose to give preferential treatment to short connections inside the bottleneck queue, so that short connections experience less packet drop rate than long connections. This is done by employing the RIO (RED with In and Out) queue management policy which uses different drop functions for different classes of traffic. Our simulation results show that: (1) in a highly loaded network, preferential treatment is necessary to provide short TCP connections with better response time and fairness without hurting the performance of long TCP connections; (2) the proposed scheme still delivers packets in FIFO manner at each link, thus it maintains statistical multiplexing gain and does not misorder packets; (3) choosing a smaller default initial timeout value for TCP can help enhance the performance of short TCP flows, however not as effectively as our scheme and at the risk of congestion collapse; (4) in the worst case, our proposal works as well as a regular RED scheme, in terms of response time and goodput.en_US
dc.description.sponsorshipNational Science Foundation (CAREER ANI-0096045, MRI EIA-9871022)en_US
dc.language.isoen_USen_US
dc.publisherBoston University Computer Science Departmenten_US
dc.relation.ispartofseriesBUCS Technical Reports;BUCS-TR-2001-005en_US
dc.subjectTraffic engineeringen_US
dc.subjectCongestion controlen_US
dc.subjectTCP performanceen_US
dc.subjectFairnessen_US
dc.titleThe War Between Mice and Elephantsen_US
dc.typeTechnical Reporten_US


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