RFC 9406 on HyStart++: Modified Slow Start for TCP
rfc-editor@rfc-editor.org Mon, 15 May 2023 19:13 UTC
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Subject: RFC 9406 on HyStart++: Modified Slow Start for TCP
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A new Request for Comments is now available in online RFC libraries.
RFC 9406
Title: HyStart++: Modified Slow Start for TCP
Author: P. Balasubramanian,
Y. Huang,
M. Olson
Status: Standards Track
Stream: IETF
Date: May 2023
Mailbox: pravb.ietf@gmail.com,
huanyi@microsoft.com,
maolson@microsoft.com
Pages: 9
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-tcpm-hystartplusplus-14.txt
URL: https://www.rfc-editor.org/info/rfc9406
DOI: 10.17487/RFC9406
This document describes HyStart++, a simple modification to the slow
start phase of congestion control algorithms. Slow start can
overshoot the ideal send rate in many cases, causing high packet loss
and poor performance. HyStart++ uses increase in round-trip delay as
a heuristic to find an exit point before possible overshoot. It also
adds a mitigation to prevent jitter from causing premature slow start
exit.
This document is a product of the TCP Maintenance and Minor Extensions Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
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