Active ECN Mechanism for Fairness among TCP Sessions with Different Round Trip Times

Takahiro MATSUDA; Akira NAGATA; Miki YAMAMOTO

Active ECN Mechanism for Fairness among TCP Sessions with Different Round Trip Times

Takahiro MATSUDA, Akira NAGATA, Miki YAMAMOTO

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The window flow control based end-to-end TCP congestion control may cause unfair resource allocation among multiple TCP connections with different RTTs (round trip times) at a bottleneck link. In this paper, in order to improve this unfairness, we propose the active ECN which is an ECN based active queue mechanism (AQM). A bottleneck router with the proposed mechanism marks TCP segments with a probability which depends on the RTT of each connection. By enabling the TCP senders to reduce their transmission rate when their packets are marked, the proposed mechanism can realize the same transmission rate among TCP connections with different RTTs. Furthermore, the active ECN can directly mark ACKs from TCP receivers, while the conventional ECN marks TCP segments coming from the TCP senders. As a result, the queue length distribution at the bottleneck link gets stabilized, because the sender can quickly react to the marking according to variation of the queue length.

Publication: IEICE TRANSACTIONS on Communications Vol.E87-B No.10 pp.2931-2938

Publication Date: 2004/10/01

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Type of Manuscript: PAPER

Category: Internet

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Takahiro MATSUDA, Akira NAGATA, Miki YAMAMOTO, "Active ECN Mechanism for Fairness among TCP Sessions with Different Round Trip Times" in IEICE TRANSACTIONS on Communications, vol. E87-B, no. 10, pp. 2931-2938, October 2004, doi: .
Abstract: The window flow control based end-to-end TCP congestion control may cause unfair resource allocation among multiple TCP connections with different RTTs (round trip times) at a bottleneck link. In this paper, in order to improve this unfairness, we propose the active ECN which is an ECN based active queue mechanism (AQM). A bottleneck router with the proposed mechanism marks TCP segments with a probability which depends on the RTT of each connection. By enabling the TCP senders to reduce their transmission rate when their packets are marked, the proposed mechanism can realize the same transmission rate among TCP connections with different RTTs. Furthermore, the active ECN can directly mark ACKs from TCP receivers, while the conventional ECN marks TCP segments coming from the TCP senders. As a result, the queue length distribution at the bottleneck link gets stabilized, because the sender can quickly react to the marking according to variation of the queue length.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/e87-b_10_2931/_p

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@ARTICLE{e87-b_10_2931,
author={Takahiro MATSUDA, Akira NAGATA, Miki YAMAMOTO, },
journal={IEICE TRANSACTIONS on Communications},
title={Active ECN Mechanism for Fairness among TCP Sessions with Different Round Trip Times},
year={2004},
volume={E87-B},
number={10},
pages={2931-2938},
abstract={The window flow control based end-to-end TCP congestion control may cause unfair resource allocation among multiple TCP connections with different RTTs (round trip times) at a bottleneck link. In this paper, in order to improve this unfairness, we propose the active ECN which is an ECN based active queue mechanism (AQM). A bottleneck router with the proposed mechanism marks TCP segments with a probability which depends on the RTT of each connection. By enabling the TCP senders to reduce their transmission rate when their packets are marked, the proposed mechanism can realize the same transmission rate among TCP connections with different RTTs. Furthermore, the active ECN can directly mark ACKs from TCP receivers, while the conventional ECN marks TCP segments coming from the TCP senders. As a result, the queue length distribution at the bottleneck link gets stabilized, because the sender can quickly react to the marking according to variation of the queue length.},
keywords={},
doi={},
ISSN={},
month={October},}

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TY - JOUR
TI - Active ECN Mechanism for Fairness among TCP Sessions with Different Round Trip Times
T2 - IEICE TRANSACTIONS on Communications
SP - 2931
EP - 2938
AU - Takahiro MATSUDA
AU - Akira NAGATA
AU - Miki YAMAMOTO
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E87-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2004
AB - The window flow control based end-to-end TCP congestion control may cause unfair resource allocation among multiple TCP connections with different RTTs (round trip times) at a bottleneck link. In this paper, in order to improve this unfairness, we propose the active ECN which is an ECN based active queue mechanism (AQM). A bottleneck router with the proposed mechanism marks TCP segments with a probability which depends on the RTT of each connection. By enabling the TCP senders to reduce their transmission rate when their packets are marked, the proposed mechanism can realize the same transmission rate among TCP connections with different RTTs. Furthermore, the active ECN can directly mark ACKs from TCP receivers, while the conventional ECN marks TCP segments coming from the TCP senders. As a result, the queue length distribution at the bottleneck link gets stabilized, because the sender can quickly react to the marking according to variation of the queue length.
ER -