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Proportional Rate Reduction for TCP

Document Type Expired Internet-Draft (tcpm WG)
Authors Matt Mathis , Nandita Dukkipati , Yuchung Cheng
Last updated 2021-08-26 (Latest revision 2021-02-22)
Replaces draft-mathis-tcpm-rfc6937bis
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
plain text htmlized pdfized bibtex
Stream WG state WG Document
Associated WG milestone
Aug 2021
Submit RFC6937bis document to the IESG for publication as a Proposed Standard RFC
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)
This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


This document updates the experimental Proportional Rate Reduction (PRR) algorithm, described RFC 6937, to standards track. PRR potentially replaces the Fast Recovery and Rate-Halving algorithms. All of these algorithms regulate the amount of data sent by TCP or other transport protocol during loss recovery. PRR accurately regulates the actual flight size through recovery such that at the end of recovery it will be as close as possible to the ssthresh, as determined by the congestion control algorithm.


Matt Mathis
Nandita Dukkipati
Yuchung Cheng

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)