A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the TCP Maintenance and Minor Extensions Working Group of the IETF.
Title : Using TCP Selective Acknowledgement (SACK) Information to Determine Duplicate Acknowledgements for Loss Recovery Initiation
Author(s) : I. Jarvinen, M. Kojo
Filename : draft-ietf-tcpm-sack-recovery-entry-00.txt
Pages : 17
Date : 2009-10-19
This document describes a TCP sender algorithm to trigger loss
recovery based on the TCP Selective Acknowledgement (SACK)
information gathered on a SACK scoreboard instead of simply counting
the number of arriving duplicate acknowledgements (ACKs) in the
traditional way. The given algorithm is more robust to ACK losses,
ACK reordering, missed duplicate acknowledgements due to delayed
acknowledgements, and extra duplicate acknowledgements due to
duplicated segments and out-of-window segments. The algorithm allows
not only a timely initiation of TCP loss recovery but also reduces
false fast retransmits. It has a low implementation cost on top of
the SACK scoreboard defined in RFC 3517.
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