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This document specifies Non-Congestion Robustness (NCR) for TCP. In the
absence of explicit congestion notification from the network, TCP uses loss as an indication of congestion.
One of the ways TCP detects loss is using the arrival of three duplicate acknowledgments.
However, this heuristic is not always correct, notably in the case when network paths
reorder segments (for whatever reason), resulting in degraded performance. TCP-NCR is designed to mitigate this
degraded performance by 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, as well as the
costs and benefits of these modifications. This memo defines an Experimental Protocol
for the Internet community.
Anil Reddy <firstname.lastname@example.org>
Sumitha Bhandarkar <email@example.com>
Ethan Blanton <firstname.lastname@example.org>
Mark Allman <email@example.com>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)