[tcpm] I-D ACTION:draft-ietf-tcpm-rfc4138bis-00.txt

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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-00.txt
	Pages		: 17
	Date		: 2007-6-12

    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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