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Sender Control of Delayed Acknowledgments in TCP: Problem Statement, Requirements and Analysis of Potential Solutions

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Carles Gomez , Jon Crowcroft
Last updated 2020-09-27 (Latest revision 2020-03-26)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active.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:


TCP Delayed Acknowledgments (ACKs) allow reducing protocol overhead in many scenarios. However, in some cases, Delayed ACKs may significantly degrade network and device performance in terms of link utilization, latency, memory usage and/or energy consumption. This document presents the problem statement regarding sender control of Delayed ACKs in TCP. The document discusses the scenarios and use cases in which sender control of Delayed ACKs offers advantages. Then, requirements for a potential solution are derived. Finally, a number of potential solutions are discussed, based on the requirements, and also considering pros and cons in each case.


Carles Gomez
Jon Crowcroft

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