Profile for Datagram Congestion Control Protocol (DCCP) Congestion ID 4: TCP-Friendly Rate Control for Small Packets (TFRC-SP)
RFC 5622
| Document | Type |
RFC - Experimental
(August 2009; No errata)
Updated by RFC 6323
Was draft-ietf-dccp-ccid4 (dccp WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-floyd-dccp-ccid4 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5622 (Experimental) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Lars Eggert | ||
| Send notices to | (None) | ||
Network Working Group S. Floyd
Request for Comments: 5622 ICIR
Category: Experimental E. Kohler
UCLA
August 2009
Profile for Datagram Congestion Control Protocol (DCCP)
Congestion ID 4: TCP-Friendly Rate Control for Small Packets (TFRC-SP)
Abstract
This document specifies a profile for Congestion Control Identifier
4, the small-packet variant of TCP-Friendly Rate Control (TFRC), in
the Datagram Congestion Control Protocol (DCCP). CCID 4 is for
experimental use, and uses TFRC-SP (RFC 4828), a variant of TFRC
designed for applications that send small packets. CCID 4 is
considered experimental because TFRC-SP is itself experimental, and
is not proposed for widespread deployment in the global Internet at
this time. The goal for TFRC-SP is to achieve roughly the same
bandwidth in bits per second (bps) as a TCP flow using packets of up
to 1500 bytes but experiencing the same level of congestion. CCID 4
is for use for senders that send small packets and would like a TCP-
friendly sending rate, possibly with Explicit Congestion Notification
(ECN), while minimizing abrupt rate changes.
Status of This Memo
This memo defines an Experimental Protocol for the Internet
community. It does not specify an Internet standard of any kind.
Discussion and suggestions for improvement are requested.
Distribution of this memo is unlimited.
Copyright Notice
Copyright (c) 2009 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 (http://trustee.ietf.org/license-info).
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
Floyd & Kohler Experimental [Page 1]
RFC 5622 Profile for DCCP CCID 4 August 2009
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
than English.
Table of Contents
1. Introduction ....................................................3
2. Conventions .....................................................4
3. Usage ...........................................................4
3.1. Relationship with TFRC and TFRC-SP .........................5
3.2. Example Half-Connection ....................................5
4. Connection Establishment ........................................6
5. Congestion Control on Data Packets ..............................6
5.1. Response to Idle and Application-Limited Periods ...........7
5.2. Response to Data Dropped and Slow Receiver .................7
5.3. Packet Sizes ...............................................7
6. Acknowledgements ................................................8
6.1. Loss Interval Definition ...................................8
6.2. Congestion Control on Acknowledgements .....................8
6.3. Acknowledgements of Acknowledgements .......................8
6.4. Quiescence .................................................8
7. Explicit Congestion Notification ................................8
8. Options and Features ............................................9
8.1. Window Counter Value ......................................10
8.2. Elapsed Time Options ......................................10
8.3. Receive Rate Option .......................................10
8.4. Send Loss Event Rate Feature ..............................10
8.5. Loss Event Rate Option ....................................11
8.6. Loss Intervals Option .....................................11
8.7. Dropped Packets Option ....................................11
8.7.1. Example ............................................13
9. Verifying Congestion Control Compliance with ECN ...............14
Show full document text