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TFRC-based Congestion Control for Saratoga
draft-eddy-tsvwg-saratoga-tfrc-05

Document type: Active Internet-Draft (individual)
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Last updated: 2014-04-19
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Network Working Group                                            W. Eddy
Internet-Draft                                               MTI Systems
Intended status: Experimental                                    L. Wood
Expires: October 21, 2014                                  Surrey alumni
                                                              W. Ivancic
                                                                    NASA
                                                          April 19, 2014

               TFRC-based Congestion Control for Saratoga
                   draft-eddy-tsvwg-saratoga-tfrc-05

Abstract

   This document specifies the use of TCP-Friendly Rate Control (TFRC)
   with the Saratoga data transfer protocol.  The necessary conventions
   that a Saratoga sender and receiver implementation must follow if
   they wish to enable the use of TFRC are described.

Status of This Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 21, 2014.

Copyright Notice

   Copyright (c) 2014 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
   (http://trustee.ietf.org/license-info) 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.

Eddy, et al.            Expires October 21, 2014                [Page 1]
Internet-Draft                Saratoga TFRC                   April 2014

   This document may not be modified, and derivative works of it may not
   be created, except to format it for publication as an RFC or to
   translate it into languages other than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Receiver-Side Behavior  . . . . . . . . . . . . . . . . . . .   3
   3.  Sender-Side Behavior  . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Differences from Shahriar et al. . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   In order to support use of the Saratoga protocol
   [draft-wood-tsvwg-saratoga] on networks with multiple data flows,
   multiple hops, and/or experimentally on the Internet, some form of
   congestion control is required.  Particularly, for use on the
   Internet, rather than the private links and networks that Saratoga
   was originally developed for, congestion control is a requirement, as
   indicated by the UDP Guidelines [RFC5405].

   This document provides the specification of one type of congestion
   control, based on TCP-Friendly Rate Control (TFRC), which is intended
   to be fairly conservative in terms of performance.  Better-performing
   congestion-control algorithms are possible in terms of throughput,
   but this TFRC-based algorithm has the advantages of being relatively
   simple and based on the well-established TFRC components, rather than
   on a newer and less well-tested mechanism.

   Saratoga data flow occurs within uniquely identified transactions
   between a sender and receiver.  Saratoga primitively supports link-
   local multicast to a set of receivers, but that use case is not
   considered further in this specification and is considered out of
   scope for this document.  The congestion control mechanism specified
   in this document operates within a single transaction between a
   sender and a receiver.  Subsequent or concurrent transactions between
   the same nodes use distinct congestion control state.

   TFRC has "receiver-based" and "sender-based" variations, as

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