[tcpm] I-D Action: draft-ietf-tcpm-alternativebackoff-ecn-02.txt
internet-drafts@ietf.org Fri, 20 October 2017 21:26 UTC
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Date: Fri, 20 Oct 2017 14:26:43 -0700
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Subject: [tcpm] I-D Action: draft-ietf-tcpm-alternativebackoff-ecn-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the TCP Maintenance and Minor Extensions WG of the IETF. Title : TCP Alternative Backoff with ECN (ABE) Authors : Naeem Khademi Michael Welzl Grenville Armitage Godred Fairhurst Filename : draft-ietf-tcpm-alternativebackoff-ecn-02.txt Pages : 12 Date : 2017-10-20 Abstract: Recent Active Queue Management (AQM) mechanisms instantiate shallow buffers with burst tolerance to minimise the time that packets spend enqueued at a bottleneck. However, shallow buffering can cause noticeable performance degradation when TCP is used over a network path with a large bandwidth-delay-product. Traditional methods rely on detecting network congestion through reported loss of transport packets. Explicit Congestion Notification (ECN) instead allows a router to directly signal incipient congestion. A sending endpoint can distinguish when congestion is signalled via ECN, rather than by packet loss. An ECN signal indicates that an AQM mechanism has done its job, and therefore the bottleneck network queue is likely to be shallow. This document therefore proposes an update to the TCP sender-side ECN reaction in congestion avoidance to reduce the Congestion Window (cwnd) by a smaller amount than the congestion control algorithm's reaction to loss. This document also recommends this approach to be adopted by any other transport protocol that implements a congestion control reduction to an ECN congestion signal. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-tcpm-alternativebackoff-ecn/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-ietf-tcpm-alternativebackoff-ecn-02 https://datatracker.ietf.org/doc/html/draft-ietf-tcpm-alternativebackoff-ecn-02 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-tcpm-alternativebackoff-ecn-02 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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