TFRC-based Congestion Control for Saratoga
draft-eddy-tsvwg-saratoga-tfrc-11
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Network Working Group W. Eddy
Internet-Draft MTI Systems
Intended status: Experimental L. Wood
Expires: November 24, 2017 Surrey alumni
W. Ivancic
Syzygy
May 23, 2017
TFRC-based Congestion Control for Saratoga
draft-eddy-tsvwg-saratoga-tfrc-11
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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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 November 24, 2017.
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
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 November 24, 2017 [Page 1]
Internet-Draft Saratoga TFRC May 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
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