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TCP ACK Rate Request Option

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Replaced".
Expired & archived
Authors Carles Gomez , Jon Crowcroft
Last updated 2021-08-23 (Latest revision 2021-02-19)
Replaced by draft-ietf-tcpm-ack-rate-request
RFC stream (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This Internet-Draft is no longer active.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) is a widely deployed mechanism that allows reducing protocol overhead in many scenarios. However, Delayed ACKs may also contribute to suboptimal performance. When a relatively large congestion window (cwnd) can be used, less frequent ACKs may be desirable. On the other hand, in relatively small cwnd scenarios, eliciting an immediate ACK may avoid unnecessary delays that may be incurred by the Delayed ACKs mechanism. This document specifies the TCP ACK Rate Request (TARR) option. This option allows a sender to indicate the ACK rate to be used by a receiver, and it also allows to request immediate ACKs from a receiver.


Carles Gomez
Jon Crowcroft

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