draft-ietf-tcpm-alternativebackoff-ecn-10.txt		draft-ietf-tcpm-alternativebackoff-ecn-11.txt
	skipping to change at page 1, line 13 ¶		skipping to change at page 1, line 13 ¶
	Network Working Group N. Khademi		Network Working Group N. Khademi
	Internet-Draft M. Welzl		Internet-Draft M. Welzl
	Intended status: Experimental University of Oslo		Intended status: Experimental University of Oslo
	Expires: March 4, 2019 G. Armitage		Expires: March 4, 2019 G. Armitage
	Netflix		Netflix
	G. Fairhurst		G. Fairhurst
	University of Aberdeen		University of Aberdeen
	August 31, 2018		August 31, 2018
	TCP Alternative Backoff with ECN (ABE)		TCP Alternative Backoff with ECN (ABE)
	draft-ietf-tcpm-alternativebackoff-ecn-10		draft-ietf-tcpm-alternativebackoff-ecn-11
	Abstract		Abstract
	Active Queue Management (AQM) mechanisms allow for burst tolerance		Active Queue Management (AQM) mechanisms allow for burst tolerance
	while enforcing short queues to minimise the time that packets spend		while enforcing short queues to minimise the time that packets spend
	enqueued at a bottleneck. This can cause noticeable performance		enqueued at a bottleneck. This can cause noticeable performance
	degradation for TCP connections traversing such a bottleneck,		degradation for TCP connections traversing such a bottleneck,
	especially if there are only a few flows or their bandwidth-delay-		especially if there are only a few flows or their bandwidth-delay-
	product is large. The reception of a Congestion Experienced (CE) ECN		product is large. The reception of a Congestion Experienced (CE) ECN
	mark indicates that an AQM mechanism is used at the bottleneck, and		mark indicates that an AQM mechanism is used at the bottleneck, and
	skipping to change at page 3, line 47 ¶		skipping to change at page 3, line 47 ¶
	the strict requirement that ECN CE signals be treated identically to		the strict requirement that ECN CE signals be treated identically to
	inferred packet loss have been relaxed [RFC8311]. This document		inferred packet loss have been relaxed [RFC8311]. This document
	therefore defines a new sender-side-only congestion control response,		therefore defines a new sender-side-only congestion control response,
	called "ABE" (Alternative Backoff with ECN). ABE improves TCP's		called "ABE" (Alternative Backoff with ECN). ABE improves TCP's
	average throughput when routers use AQM controlled buffers that allow		average throughput when routers use AQM controlled buffers that allow
	only for short queues.		only for short queues.
	2. Definitions		2. Definitions
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this		"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
	document are to be interpreted as described in RFC 2119		"OPTIONAL" in this document are to be interpreted as described in BCP
	[RFC2119][RFC8174] .		14 RFC 2119 [RFC2119] [RFC8174] when, and only when, they appear in
			all capitals, as shown here.
	3. Specification		3. Specification
	This specification changes the congestion control algorithm of an		This specification changes the congestion control algorithm of an
	ECN-Capable TCP transport protocol by changing the TCP sender		ECN-Capable TCP transport protocol by changing the TCP sender
	response to feedback from the TCP receiver that indicates reception		response to feedback from the TCP receiver that indicates reception
	of a CE-marked packet, i.e., receipt of a packet with the ECN-Echo		of a CE-marked packet, i.e., receipt of a packet with the ECN-Echo
	flag (defined in [RFC3168]) set, following the process defined in		flag (defined in [RFC3168]) set, following the process defined in
	[RFC8311].		[RFC8311].
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