draft-ietf-quic-recovery-12.txt   draft-ietf-quic-recovery-latest.txt 
QUIC Working Group J. Iyengar, Ed. QUIC Working Group J. Iyengar, Ed.
Internet-Draft Fastly Internet-Draft Fastly
Intended status: Standards Track I. Swett, Ed. Intended status: Standards Track I. Swett, Ed.
Expires: November 23, 2018 Google Expires: December 15, 2018 Google
May 22, 2018 June 13, 2018
QUIC Loss Detection and Congestion Control QUIC Loss Detection and Congestion Control
draft-ietf-quic-recovery-12 draft-ietf-quic-recovery-latest
Abstract Abstract
This document describes loss detection and congestion control This document describes loss detection and congestion control
mechanisms for QUIC. mechanisms for QUIC.
Note to Readers Note to Readers
Discussion of this draft takes place on the QUIC working group Discussion of this draft takes place on the QUIC working group
mailing list (quic@ietf.org), which is archived at mailing list (quic@ietf.org), which is archived at
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 23, 2018. This Internet-Draft will expire on December 15, 2018.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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4.7.3. Initialization . . . . . . . . . . . . . . . . . . . 24 4.7.3. Initialization . . . . . . . . . . . . . . . . . . . 24
4.7.4. On Packet Sent . . . . . . . . . . . . . . . . . . . 25 4.7.4. On Packet Sent . . . . . . . . . . . . . . . . . . . 25
4.7.5. On Packet Acknowledgement . . . . . . . . . . . . . . 25 4.7.5. On Packet Acknowledgement . . . . . . . . . . . . . . 25
4.7.6. On Packets Lost . . . . . . . . . . . . . . . . . . . 25 4.7.6. On Packets Lost . . . . . . . . . . . . . . . . . . . 25
4.7.7. On Retransmission Timeout Verified . . . . . . . . . 26 4.7.7. On Retransmission Timeout Verified . . . . . . . . . 26
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 26 6. References . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1. Normative References . . . . . . . . . . . . . . . . . . 26 6.1. Normative References . . . . . . . . . . . . . . . . . . 26
6.2. Informative References . . . . . . . . . . . . . . . . . 26 6.2. Informative References . . . . . . . . . . . . . . . . . 26
6.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.3. URIs . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . 28 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 28
Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 28 A.1. Since draft-ietf-quic-recovery-10 . . . . . . . . . . . . 28
B.1. Since draft-ietf-quic-recovery-10 . . . . . . . . . . . . 28 A.2. Since draft-ietf-quic-recovery-09 . . . . . . . . . . . . 28
B.2. Since draft-ietf-quic-recovery-09 . . . . . . . . . . . . 28 A.3. Since draft-ietf-quic-recovery-08 . . . . . . . . . . . . 28
B.3. Since draft-ietf-quic-recovery-08 . . . . . . . . . . . . 28 A.4. Since draft-ietf-quic-recovery-07 . . . . . . . . . . . . 28
B.4. Since draft-ietf-quic-recovery-07 . . . . . . . . . . . . 28 A.5. Since draft-ietf-quic-recovery-06 . . . . . . . . . . . . 28
B.5. Since draft-ietf-quic-recovery-06 . . . . . . . . . . . . 28 A.6. Since draft-ietf-quic-recovery-05 . . . . . . . . . . . . 28
B.6. Since draft-ietf-quic-recovery-05 . . . . . . . . . . . . 29 A.7. Since draft-ietf-quic-recovery-04 . . . . . . . . . . . . 29
B.7. Since draft-ietf-quic-recovery-04 . . . . . . . . . . . . 29 A.8. Since draft-ietf-quic-recovery-03 . . . . . . . . . . . . 29
B.8. Since draft-ietf-quic-recovery-03 . . . . . . . . . . . . 29 A.9. Since draft-ietf-quic-recovery-02 . . . . . . . . . . . . 29
B.9. Since draft-ietf-quic-recovery-02 . . . . . . . . . . . . 29 A.10. Since draft-ietf-quic-recovery-01 . . . . . . . . . . . . 29
B.10. Since draft-ietf-quic-recovery-01 . . . . . . . . . . . . 29 A.11. Since draft-ietf-quic-recovery-00 . . . . . . . . . . . . 29
B.11. Since draft-ietf-quic-recovery-00 . . . . . . . . . . . . 29 A.12. Since draft-iyengar-quic-loss-recovery-01 . . . . . . . . 29
B.12. Since draft-iyengar-quic-loss-recovery-01 . . . . . . . . 29 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 29
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 30 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 30
1. Introduction 1. Introduction
QUIC is a new multiplexed and secure transport atop UDP. QUIC builds QUIC is a new multiplexed and secure transport atop UDP. QUIC builds
on decades of transport and security experience, and implements on decades of transport and security experience, and implements
mechanisms that make it attractive as a modern general-purpose mechanisms that make it attractive as a modern general-purpose
transport. The QUIC protocol is described in [QUIC-TRANSPORT]. transport. The QUIC protocol is described in [QUIC-TRANSPORT].
QUIC implements the spirit of known TCP loss recovery mechanisms, QUIC implements the spirit of known TCP loss recovery mechanisms,
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This document has no IANA actions. Yet. This document has no IANA actions. Yet.
6. References 6. References
6.1. Normative References 6.1. Normative References
[QUIC-TRANSPORT] [QUIC-TRANSPORT]
Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based Iyengar, J., Ed. and M. Thomson, Ed., "QUIC: A UDP-Based
Multiplexed and Secure Transport", draft-ietf-quic- Multiplexed and Secure Transport", draft-ietf-quic-
transport-12 (work in progress). transport-latest (work in progress).
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
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in progress), February 2013. in progress), February 2013.
6.3. URIs 6.3. URIs
[1] https://mailarchive.ietf.org/arch/search/?email_list=quic [1] https://mailarchive.ietf.org/arch/search/?email_list=quic
[2] https://github.com/quicwg [2] https://github.com/quicwg
[3] https://github.com/quicwg/base-drafts/labels/-recovery [3] https://github.com/quicwg/base-drafts/labels/-recovery
Appendix A. Acknowledgments Appendix A. Change Log
Appendix B. Change Log
*RFC Editor's Note:* Please remove this section prior to *RFC Editor's Note:* Please remove this section prior to
publication of a final version of this document. publication of a final version of this document.
B.1. Since draft-ietf-quic-recovery-10 A.1. Since draft-ietf-quic-recovery-10
o Improved text on ack generation (#1139, #1159) o Improved text on ack generation (#1139, #1159)
o Make references to TCP recovery mechanisms informational (#1195) o Make references to TCP recovery mechanisms informational (#1195)
o Define time_of_last_sent_handshake_packet (#1171) o Define time_of_last_sent_handshake_packet (#1171)
o Added signal from TLS the data it includes needs to be sent in a o Added signal from TLS the data it includes needs to be sent in a
Retry packet (#1061, #1199) Retry packet (#1061, #1199)
o Minimum RTT (min_rtt) is initialized with an infinite value o Minimum RTT (min_rtt) is initialized with an infinite value
(#1169) (#1169)
B.2. Since draft-ietf-quic-recovery-09 A.2. Since draft-ietf-quic-recovery-09
No significant changes. No significant changes.
B.3. Since draft-ietf-quic-recovery-08 A.3. Since draft-ietf-quic-recovery-08
o Clarified pacing and RTO (#967, #977) o Clarified pacing and RTO (#967, #977)
B.4. Since draft-ietf-quic-recovery-07 A.4. Since draft-ietf-quic-recovery-07
o Include Ack Delay in RTO(and TLP) computations (#981) o Include Ack Delay in RTO(and TLP) computations (#981)
o Ack Delay in SRTT computation (#961) o Ack Delay in SRTT computation (#961)
o Default RTT and Slow Start (#590) o Default RTT and Slow Start (#590)
o Many editorial fixes. o Many editorial fixes.
B.5. Since draft-ietf-quic-recovery-06 A.5. Since draft-ietf-quic-recovery-06
No significant changes. No significant changes.
B.6. Since draft-ietf-quic-recovery-05 A.6. Since draft-ietf-quic-recovery-05
o Add more congestion control text (#776) o Add more congestion control text (#776)
B.7. Since draft-ietf-quic-recovery-04 A.7. Since draft-ietf-quic-recovery-04
No significant changes. No significant changes.
B.8. Since draft-ietf-quic-recovery-03 A.8. Since draft-ietf-quic-recovery-03
No significant changes. No significant changes.
B.9. Since draft-ietf-quic-recovery-02 A.9. Since draft-ietf-quic-recovery-02
o Integrate F-RTO (#544, #409) o Integrate F-RTO (#544, #409)
o Add congestion control (#545, #395) o Add congestion control (#545, #395)
o Require connection abort if a skipped packet was acknowledged o Require connection abort if a skipped packet was acknowledged
(#415) (#415)
o Simplify RTO calculations (#142, #417) o Simplify RTO calculations (#142, #417)
B.10. Since draft-ietf-quic-recovery-01 A.10. Since draft-ietf-quic-recovery-01
o Overview added to loss detection o Overview added to loss detection
o Changes initial default RTT to 100ms o Changes initial default RTT to 100ms
o Added time-based loss detection and fixes early retransmit o Added time-based loss detection and fixes early retransmit
o Clarified loss recovery for handshake packets o Clarified loss recovery for handshake packets
o Fixed references and made TCP references informative o Fixed references and made TCP references informative
B.11. Since draft-ietf-quic-recovery-00 A.11. Since draft-ietf-quic-recovery-00
o Improved description of constants and ACK behavior o Improved description of constants and ACK behavior
B.12. Since draft-iyengar-quic-loss-recovery-01 A.12. Since draft-iyengar-quic-loss-recovery-01
o Adopted as base for draft-ietf-quic-recovery o Adopted as base for draft-ietf-quic-recovery
o Updated authors/editors list o Updated authors/editors list
o Added table of contents o Added table of contents
Acknowledgments
Authors' Addresses Authors' Addresses
Jana Iyengar (editor) Jana Iyengar (editor)
Fastly Fastly
Email: jri.ietf@gmail.com Email: jri.ietf@gmail.com
Ian Swett (editor) Ian Swett (editor)
Google Google
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