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A Survey of Lower-than-Best-Effort Transport Protocols (RFC6297) Disclosure Number: IPCOM000208285D
Original Publication Date: 2011-Jun-01
Included in the Prior Art Database: 2011-Jun-29
Document File: 36 page(s) / 46K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Welzl: AUTHOR [+1]


This document presents a brief survey of proposals to attain a Less- than-Best-Effort (LBE) service by means of end-host mechanisms. We loosely define an LBE service as a service which results in smaller bandwidth and/or delay impact on standard TCP than standard TCP itself, when sharing a bottleneck with it. We refer to systems that are designed to provide this service as LBE systems. With the exception of TCP Vegas, which we present for historical reasons, we exclude systems that have been noted to exhibit LBE behavior under some circumstances but were not designed for this purpose (e.g., RAPID [Kon09]).

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Internet Engineering Task Force (IETF)                          M. Welzl Request for Comments: 6297                            University of Oslo Category: Informational                                           D. Ros ISSN: 2070-1721                                    IT / Telecom Bretagne                                                                June 2011

          A Survey of Lower-than-Best-Effort Transport Protocols


   This document provides a survey of transport protocols that are    designed to have a smaller bandwidth and/or delay impact on standard    TCP than standard TCP itself when they share a bottleneck with it.    Such protocols could be used for delay-insensitive "background"    traffic, as they provide what is sometimes called a "less than" (or    "lower than") best-effort service.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for informational purposes.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Not all documents    approved by the IESG are a candidate for any level of Internet    Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Welzl & Ros                   Informational                     [Page 1]
 RFC 6297                  LBE Transport Survey                 June 2011

 Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2    2.  Delay-Based Transport Protocols  . . . . . . . . . . . . . . .  3      2.1.  Accuracy of Delay-Based Congestion Predictors  . . . . . .  6      2.2.  Potential Issues w...