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HyStart++: Modified Slow Start for TCP

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Praveen Balasubramanian , Yi Huang , Matt Olson
Last updated 2020-04-26
Replaced by RFC 9406
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-tcpm-hystartplusplus
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This informational memo describes HyStart++, a simple modification to the slow start phase of TCP congestion control algorithms. HyStart++ combines the use of one variant of HyStart and Limited Slow Start (LSS) to prevent overshooting of the ideal sending rate, while also mitigating poor performance which can result from false positives when HyStart is used alone. This memo also describes the details of the current implementation in the Windows operating system.


Praveen Balasubramanian
Yi Huang
Matt Olson

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