[tcpm] I-D Action:draft-ietf-tcpm-rfc4138bis-02.txt

Internet-Drafts@ietf.org Mon, 14 July 2008 12:15 UTC

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Subject: [tcpm] I-D Action:draft-ietf-tcpm-rfc4138bis-02.txt
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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           : Forward RTO-Recovery (F-RTO): An Algorithm for Detecting Spurious Retransmission Timeouts with TCP
	Author(s)       : P. Sarolahti, et al.
	Filename        : draft-ietf-tcpm-rfc4138bis-02.txt
	Pages           : 21
	Date            : 2008-07-14

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 of the TCP sender
 monitors the incoming acknowledgments to determine whether the
 timeout was spurious.  It then decides whether to send new segments
 or retransmit unacknowledged segments.  The algorithm effectively
 helps to avoid additional unnecessary retransmissions and thereby
 improves TCP performance in the case of a spurious timeout.

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