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 : F-RTO: An Algorithm for Detecting Spurious
Retransmission Timeouts with TCP and SCTP
Author(s) : P. Sarolahti, M. Kojo
Filename : draft-ietf-tcpm-frto-02.txt
Pages : 22
Date : 2004-11-18
Spurious retransmission timeouts cause suboptimal TCP performance,
because they often result in unnecessary retransmission of the last
window of data. This document describes the F-RTO detection algorithm
for detecting spurious TCP retransmission timeouts. F-RTO is a TCP
sender only algorithm that does not require any TCP options to
operate. After retransmitting the first unacknowledged segment
triggered by a timeout, the F-RTO algorithm at a TCP sender monitors
the incoming acknowledgments to determine whether the timeout was
spurious and to decide whether to send new segments or retransmit
unacknowledged segments. The algorithm effectively helps to avoid
additional unnecessary retransmissions and thereby improves TCP
performance in case of a spurious timeout. The F-RTO algorithm can
also be applied to SCTP.
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