On the transition to a low latency TCP/IP Internet

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)2631-2635
Journal / PublicationIEEE International Conference on Communications
Publication statusPublished - 2002
Externally publishedYes


Title2002 International Conference on Communications (ICC 2002)
PlaceUnited States
CityNew York, NY
Period28 April - 2 May 2002


Recently, a number of Active Queue Management (AQM) algorithms, such as REM and GREEN, have been proposed which reduce the packet queueing backlog and hence reduce the network's latency close to the propagation delay. This paper uncovers a fundamental problem that a low latency TCP/IP network faces. We call this problem the "low latency efficiency collapse". With Explicit Congestion Notification (ECN) still not widely deployed, the main congestion notification remains packet dropping. By reducing the Round Trip Time (RTT) to near the propagation delay, TCP sessions become very aggressive and the packet dropping rate required for congestion notification becomes prohibitively high. In this paper, a solution to this problem is introduced. It is based on inducing latency. When applied to the new AQMs, it limits the packet loss whilst the Internet makes the transition to ECN. We demonstrate by an experiment that the proposed solution improves the efficiency by about 20%.