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)
Was draft-ietf-dccp-ccid4 (dccp WG)
|
|
---|---|---|---|
Authors | Eddie Kohler , Sally Floyd | ||
Last updated | 2015-10-14 | ||
Replaces | draft-floyd-dccp-ccid4 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized 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 9.1. Verifying the ECN Nonce Echo ..............................14 9.2. Verifying the Reported Loss Intervals and LossShow full document text