RFC 9406

HyStart++: Modified Slow Start for TCP, May 2023

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Also available: XML file for editing
 
Status:
PROPOSED STANDARD
Authors:
P. Balasubramanian
Y. Huang
M. Olson
Stream:
IETF
Source:
tcpm (tsv)

Cite this RFC: TXT  |  XML  |   BibTeX

DOI:  https://doi.org/10.17487/RFC9406

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Abstract

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.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.




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