A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Making TCP Adaptively Robust to Non-Congestion Events
Authors : Alexander Zimmermann
Lennart Schulte
Carsten Wolff
Arnd Hannemann
Filename : draft-zimmermann-tcpm-reordering-reaction-01.txt
Pages : 29
Date : 2014-05-20
Abstract:
This document specifies an adaptive Non-Congestion Robustness (aNCR)
mechanism for TCP. In the absence of explicit congestion
notification from the network, TCP uses only packet loss as an
indication of congestion. One of the signals TCP uses to determine
loss is the arrival of three duplicate acknowledgments. However,
this heuristic is not always correct, notably in the case when paths
reorder packets. This results in degraded performance.
TCP-aNCR is designed to mitigate this performance degradation by
adaptively increasing the number of duplicate acknowledgments
required to trigger loss recovery, based on the current state of the
connection, in an effort to better disambiguate true segment loss
from segment reordering. This document specifies the changes to TCP
and TCP-NCR (on which this specification is build on) and discusses
the costs and benefits of these modifications.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-zimmermann-tcpm-reordering-reaction/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-zimmermann-tcpm-reordering-reaction-01
A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=draft-zimmermann-tcpm-reordering-reaction-01
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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