TFRC-based Congestion Control for Saratoga
draft-eddy-tsvwg-saratoga-tfrc-12

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Network Working Group                                            W. Eddy
Internet-Draft                                               MTI Systems
Intended status: Experimental                                    L. Wood
Expires: June 20, 2018                                     Surrey alumni
                                                              W. Ivancic
                                                                  Syzygy
                                                       December 17, 2017

               TFRC-based Congestion Control for Saratoga
                   draft-eddy-tsvwg-saratoga-tfrc-12

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on June 20, 2018.

Copyright Notice

   Copyright (c) 2017 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
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Eddy, et al.              Expires June 20, 2018                 [Page 1]
Internet-Draft                Saratoga TFRC                December 2017

   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
   descripted in [RFC5348].  In either case, a node with knowledge of
   the loss-event rate and round-trip time (RTT) uses this information

Eddy, et al.              Expires June 20, 2018                 [Page 2]