[rfc-dist] RFC 8985 on The RACK-TLP Loss Detection Algorithm for TCP

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Sat Feb 20 18:21:41 PST 2021

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        RFC 8985

        Title:      The RACK-TLP Loss Detection Algorithm 
                    for TCP 
        Author:     Y. Cheng,
                    N. Cardwell,
                    N. Dukkipati,
                    P. Jha
        Status:     Standards Track
        Stream:     IETF
        Date:       February 2021
        Mailbox:    ycheng at google.com,
                    ncardwell at google.com,
                    nanditad at google.com,
                    priyarjha at google.com
        Pages:      29
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-tcpm-rack-15.txt

        URL:        https://www.rfc-editor.org/info/rfc8985

        DOI:        10.17487/RFC8985

This document presents the RACK-TLP loss detection algorithm for TCP.
RACK-TLP uses per-segment transmit timestamps and selective
acknowledgments (SACKs) and has two parts. Recent Acknowledgment
(RACK) starts fast recovery quickly using time-based inferences
derived from acknowledgment (ACK) feedback, and Tail Loss Probe (TLP)
leverages RACK and sends a probe packet to trigger ACK feedback to
avoid retransmission timeout (RTO) events. Compared to the widely
used duplicate acknowledgment (DupAck) threshold approach, RACK-TLP
detects losses more efficiently when there are application-limited
flights of data, lost retransmissions, or data packet reordering
events. It is intended to be an alternative to the DupAck threshold

This document is a product of the TCP Maintenance and Minor Extensions Working Group of the IETF.

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the 
standardization state and status of this protocol.  Distribution of this 
memo is unlimited.

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