RFC 5622 · EXPERIMENTAL · 2009 MON · 27 JUL 2026

Profile for Datagram Congestion Control Protocol Congestion ID 4: TCP-Friendly Rate Control for Small Packets

By S. Floyd, E. Kohler · Published August 2009 · DOI 10.17487/RFC5622

Overview

RFC 5622, “Profile for Datagram Congestion Control Protocol Congestion ID 4: TCP-Friendly Rate Control for Small Packets”, is an Experimental document published in August 2009 by S. Floyd, E. Kohler. It has since been updated by RFC 6323, RFC 8311. The canonical text is published by the RFC Editor.

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. This memo defines an Experimental Protocol for the Internet community.

Abstract as published in the RFC, via rfc-editor.org.

What “Experimental” means

Describes a specification that is part of a research or development effort, published so the community can gain experience with it.

Read this RFC

The canonical text of RFC 5622 is hosted at rfc-editor.org. Available in TXT,HTML.

Read on rfc-editor.org Plain text › HTML › IETF Datatracker › DOI link ›

Relationships to other RFCs

Updated by: RFC 6323 RFC 8311

Other RFCs from 2009

Abstract

What “Experimental” means

Who Is Online