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Performance of TCP Congestion Control with Explicit Rate Feedback: Rate Adaptive TCP (RATCP)

Karnik, Aditya and Kumar, Anurag (2000) Performance of TCP Congestion Control with Explicit Rate Feedback: Rate Adaptive TCP (RATCP). In: IEEE Global Telecommunications Conference, 2000. GLOBECOM '00, 27 Nov.- 1 December, San Francisco, Vol.1, 571 -576.


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We consider a modification of TCP congestion control in which the congestion window is adapted to explicit bottleneck rate feedback; we call this RATCP (Rate Aduprive TCP). Our goal in this paper is to study the performance of RATCP (using analytical models, and an experimental test-bed) in various network scenarios, and to compare the performance of RATCP and TCP, both with and without fast-retransmit and fast-recovery. We find that when sessions with the same round trip times share a bottleneck link then, even with ideal fair rate feedback, the performance of RATCP is only slightly better than that of TCP. RATCP, however, does reduce losses significantly. When there are random losses, however, RATCP with fast-recovery provides substantially better throughput than plain TCP. Further, when sessions with different round trip times share the bottleneck link, as expected, RATCP ensures fairness. Finally, we suggest a practical situation in which RATCP can be useful for improving web access performance.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Explicit rate control;Rate adaptive TCP;Bandwidth sharing;Adaptive window congestion control
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 24 Feb 2006
Last Modified: 19 Sep 2010 04:24
URI: http://eprints.iisc.ac.in/id/eprint/5696

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