draft-ietf-quic-recovery-26.txt   draft-ietf-quic-recovery-27.txt 
QUIC J. Iyengar, Ed. QUIC J. Iyengar, Ed.
Internet-Draft Fastly Internet-Draft Fastly
Intended status: Standards Track I. Swett, Ed. Intended status: Standards Track I. Swett, Ed.
Expires: 24 August 2020 Google Expires: 10 September 2020 Google
21 February 2020 9 March 2020
QUIC Loss Detection and Congestion Control QUIC Loss Detection and Congestion Control
draft-ietf-quic-recovery-26 draft-ietf-quic-recovery-27
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
skipping to change at page 1, line 44 skipping to change at page 1, line 44
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 24 August 2020. This Internet-Draft will expire on 10 September 2020.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 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 (https://trustee.ietf.org/ Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
skipping to change at page 3, line 32 skipping to change at page 3, line 32
Appendix B. Congestion Control Pseudocode . . . . . . . . . . . 31 Appendix B. Congestion Control Pseudocode . . . . . . . . . . . 31
B.1. Constants of interest . . . . . . . . . . . . . . . . . . 31 B.1. Constants of interest . . . . . . . . . . . . . . . . . . 31
B.2. Variables of interest . . . . . . . . . . . . . . . . . . 32 B.2. Variables of interest . . . . . . . . . . . . . . . . . . 32
B.3. Initialization . . . . . . . . . . . . . . . . . . . . . 33 B.3. Initialization . . . . . . . . . . . . . . . . . . . . . 33
B.4. On Packet Sent . . . . . . . . . . . . . . . . . . . . . 33 B.4. On Packet Sent . . . . . . . . . . . . . . . . . . . . . 33
B.5. On Packet Acknowledgement . . . . . . . . . . . . . . . . 33 B.5. On Packet Acknowledgement . . . . . . . . . . . . . . . . 33
B.6. On New Congestion Event . . . . . . . . . . . . . . . . . 34 B.6. On New Congestion Event . . . . . . . . . . . . . . . . . 34
B.7. Process ECN Information . . . . . . . . . . . . . . . . . 34 B.7. Process ECN Information . . . . . . . . . . . . . . . . . 34
B.8. On Packets Lost . . . . . . . . . . . . . . . . . . . . . 35 B.8. On Packets Lost . . . . . . . . . . . . . . . . . . . . . 35
Appendix C. Change Log . . . . . . . . . . . . . . . . . . . . . 35 Appendix C. Change Log . . . . . . . . . . . . . . . . . . . . . 35
C.1. Since draft-ietf-quic-recovery-25 . . . . . . . . . . . . 35 C.1. Since draft-ietf-quic-recovery-26 . . . . . . . . . . . . 35
C.2. Since draft-ietf-quic-recovery-24 . . . . . . . . . . . . 35 C.2. Since draft-ietf-quic-recovery-25 . . . . . . . . . . . . 35
C.3. Since draft-ietf-quic-recovery-23 . . . . . . . . . . . . 35 C.3. Since draft-ietf-quic-recovery-24 . . . . . . . . . . . . 35
C.4. Since draft-ietf-quic-recovery-22 . . . . . . . . . . . . 36 C.4. Since draft-ietf-quic-recovery-23 . . . . . . . . . . . . 36
C.5. Since draft-ietf-quic-recovery-21 . . . . . . . . . . . . 36 C.5. Since draft-ietf-quic-recovery-22 . . . . . . . . . . . . 36
C.6. Since draft-ietf-quic-recovery-20 . . . . . . . . . . . . 36 C.6. Since draft-ietf-quic-recovery-21 . . . . . . . . . . . . 36
C.7. Since draft-ietf-quic-recovery-19 . . . . . . . . . . . . 36 C.7. Since draft-ietf-quic-recovery-20 . . . . . . . . . . . . 36
C.8. Since draft-ietf-quic-recovery-18 . . . . . . . . . . . . 37 C.8. Since draft-ietf-quic-recovery-19 . . . . . . . . . . . . 36
C.9. Since draft-ietf-quic-recovery-17 . . . . . . . . . . . . 37 C.9. Since draft-ietf-quic-recovery-18 . . . . . . . . . . . . 37
C.10. Since draft-ietf-quic-recovery-16 . . . . . . . . . . . . 38 C.10. Since draft-ietf-quic-recovery-17 . . . . . . . . . . . . 37
C.11. Since draft-ietf-quic-recovery-14 . . . . . . . . . . . . 38 C.11. Since draft-ietf-quic-recovery-16 . . . . . . . . . . . . 38
C.12. Since draft-ietf-quic-recovery-13 . . . . . . . . . . . . 38 C.12. Since draft-ietf-quic-recovery-14 . . . . . . . . . . . . 38
C.13. Since draft-ietf-quic-recovery-12 . . . . . . . . . . . . 39 C.13. Since draft-ietf-quic-recovery-13 . . . . . . . . . . . . 38
C.14. Since draft-ietf-quic-recovery-11 . . . . . . . . . . . . 39 C.14. Since draft-ietf-quic-recovery-12 . . . . . . . . . . . . 39
C.15. Since draft-ietf-quic-recovery-10 . . . . . . . . . . . . 39 C.15. Since draft-ietf-quic-recovery-11 . . . . . . . . . . . . 39
C.16. Since draft-ietf-quic-recovery-09 . . . . . . . . . . . . 39 C.16. Since draft-ietf-quic-recovery-10 . . . . . . . . . . . . 39
C.17. Since draft-ietf-quic-recovery-08 . . . . . . . . . . . . 39 C.17. Since draft-ietf-quic-recovery-09 . . . . . . . . . . . . 39
C.18. Since draft-ietf-quic-recovery-07 . . . . . . . . . . . . 39 C.18. Since draft-ietf-quic-recovery-08 . . . . . . . . . . . . 39
C.19. Since draft-ietf-quic-recovery-06 . . . . . . . . . . . . 40 C.19. Since draft-ietf-quic-recovery-07 . . . . . . . . . . . . 39
C.20. Since draft-ietf-quic-recovery-05 . . . . . . . . . . . . 40 C.20. Since draft-ietf-quic-recovery-06 . . . . . . . . . . . . 40
C.21. Since draft-ietf-quic-recovery-04 . . . . . . . . . . . . 40 C.21. Since draft-ietf-quic-recovery-05 . . . . . . . . . . . . 40
C.22. Since draft-ietf-quic-recovery-03 . . . . . . . . . . . . 40 C.22. Since draft-ietf-quic-recovery-04 . . . . . . . . . . . . 40
C.23. Since draft-ietf-quic-recovery-02 . . . . . . . . . . . . 40 C.23. Since draft-ietf-quic-recovery-03 . . . . . . . . . . . . 40
C.24. Since draft-ietf-quic-recovery-01 . . . . . . . . . . . . 40 C.24. Since draft-ietf-quic-recovery-02 . . . . . . . . . . . . 40
C.25. Since draft-ietf-quic-recovery-00 . . . . . . . . . . . . 40 C.25. Since draft-ietf-quic-recovery-01 . . . . . . . . . . . . 40
C.26. Since draft-iyengar-quic-loss-recovery-01 . . . . . . . . 41 C.26. Since draft-ietf-quic-recovery-00 . . . . . . . . . . . . 40
C.27. Since draft-iyengar-quic-loss-recovery-01 . . . . . . . . 41
Appendix D. Contributors . . . . . . . . . . . . . . . . . . . . 41 Appendix D. Contributors . . . . . . . . . . . . . . . . . . . . 41
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 41 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 41
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 41 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 41
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].
skipping to change at page 21, line 28 skipping to change at page 21, line 28
8. IANA Considerations 8. IANA Considerations
This document has no IANA actions. Yet. This document has no IANA actions. Yet.
9. References 9. References
9.1. Normative References 9.1. Normative References
[QUIC-TLS] Thomson, M., Ed. and S. Turner, Ed., "Using TLS to Secure [QUIC-TLS] Thomson, M., Ed. and S. Turner, Ed., "Using TLS to Secure
QUIC", Work in Progress, Internet-Draft, draft-ietf-quic- QUIC", Work in Progress, Internet-Draft, draft-ietf-quic-
tls-26, 21 February 2020, tls-27, 9 March 2020,
<https://tools.ietf.org/html/draft-ietf-quic-tls-26>. <https://tools.ietf.org/html/draft-ietf-quic-tls-27>.
[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", Work in Progress, Multiplexed and Secure Transport", Work in Progress,
Internet-Draft, draft-ietf-quic-transport-26, 21 February Internet-Draft, draft-ietf-quic-transport-27, 9 March
2020, <https://tools.ietf.org/html/draft-ietf-quic- 2020, <https://tools.ietf.org/html/draft-ietf-quic-
transport-26>. transport-27>.
[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>.
[RFC8085] Eggert, L., Fairhurst, G., and G. Shepherd, "UDP Usage [RFC8085] Eggert, L., Fairhurst, G., and G. Shepherd, "UDP Usage
Guidelines", BCP 145, RFC 8085, DOI 10.17487/RFC8085, Guidelines", BCP 145, RFC 8085, DOI 10.17487/RFC8085,
March 2017, <https://www.rfc-editor.org/info/rfc8085>. March 2017, <https://www.rfc-editor.org/info/rfc8085>.
skipping to change at page 22, line 11 skipping to change at page 22, line 11
May 2017, <https://www.rfc-editor.org/info/rfc8174>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
9.2. Informative References 9.2. Informative References
[FACK] Mathis, M. and J. Mahdavi, "Forward Acknowledgement: [FACK] Mathis, M. and J. Mahdavi, "Forward Acknowledgement:
Refining TCP Congestion Control", ACM SIGCOMM , August Refining TCP Congestion Control", ACM SIGCOMM , August
1996. 1996.
[RACK] Cheng, Y., Cardwell, N., Dukkipati, N., and P. Jha, "RACK: [RACK] Cheng, Y., Cardwell, N., Dukkipati, N., and P. Jha, "RACK:
a time-based fast loss detection algorithm for TCP", Work a time-based fast loss detection algorithm for TCP", Work
in Progress, Internet-Draft, draft-ietf-tcpm-rack-05, 26 in Progress, Internet-Draft, draft-ietf-tcpm-rack-07, 17
April 2019, <http://www.ietf.org/internet-drafts/draft- January 2020, <http://www.ietf.org/internet-drafts/draft-
ietf-tcpm-rack-05.txt>. ietf-tcpm-rack-07.txt>.
[RFC3168] Ramakrishnan, K., Floyd, S., and D. Black, "The Addition [RFC3168] Ramakrishnan, K., Floyd, S., and D. Black, "The Addition
of Explicit Congestion Notification (ECN) to IP", of Explicit Congestion Notification (ECN) to IP",
RFC 3168, DOI 10.17487/RFC3168, September 2001, RFC 3168, DOI 10.17487/RFC3168, September 2001,
<https://www.rfc-editor.org/info/rfc3168>. <https://www.rfc-editor.org/info/rfc3168>.
[RFC4653] Bhandarkar, S., Reddy, A. L. N., Allman, M., and E. [RFC4653] Bhandarkar, S., Reddy, A. L. N., Allman, M., and E.
Blanton, "Improving the Robustness of TCP to Non- Blanton, "Improving the Robustness of TCP to Non-
Congestion Events", RFC 4653, DOI 10.17487/RFC4653, August Congestion Events", RFC 4653, DOI 10.17487/RFC4653, August
2006, <https://www.rfc-editor.org/info/rfc4653>. 2006, <https://www.rfc-editor.org/info/rfc4653>.
skipping to change at page 35, line 37 skipping to change at page 35, line 37
if (InPersistentCongestion(largest_lost_packet)): if (InPersistentCongestion(largest_lost_packet)):
congestion_window = kMinimumWindow congestion_window = kMinimumWindow
Appendix C. Change Log Appendix C. 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.
Issue and pull request numbers are listed with a leading octothorp. Issue and pull request numbers are listed with a leading octothorp.
C.1. Since draft-ietf-quic-recovery-25 C.1. Since draft-ietf-quic-recovery-26
No changes.
C.2. Since draft-ietf-quic-recovery-25
No significant changes. No significant changes.
C.2. Since draft-ietf-quic-recovery-24 C.3. Since draft-ietf-quic-recovery-24
* Require congestion control of some sort (#3247, #3244, #3248) * Require congestion control of some sort (#3247, #3244, #3248)
* Set a minimum reordering threshold (#3256, #3240) * Set a minimum reordering threshold (#3256, #3240)
* PTO is specific to a packet number space (#3067, #3074, #3066) * PTO is specific to a packet number space (#3067, #3074, #3066)
C.3. Since draft-ietf-quic-recovery-23 C.4. Since draft-ietf-quic-recovery-23
* Define under-utilizing the congestion window (#2630, #2686, #2675) * Define under-utilizing the congestion window (#2630, #2686, #2675)
* PTO MUST send data if possible (#3056, #3057) * PTO MUST send data if possible (#3056, #3057)
* Connection Close is not ack-eliciting (#3097, #3098) * Connection Close is not ack-eliciting (#3097, #3098)
* MUST limit bursts to the initial congestion window (#3160) * MUST limit bursts to the initial congestion window (#3160)
* Define the current max_datagram_size for congestion control * Define the current max_datagram_size for congestion control
(#3041, #3167) (#3041, #3167)
C.4. Since draft-ietf-quic-recovery-22 C.5. Since draft-ietf-quic-recovery-22
* PTO should always send an ack-eliciting packet (#2895) * PTO should always send an ack-eliciting packet (#2895)
* Unify the Handshake Timer with the PTO timer (#2648, #2658, #2886) * Unify the Handshake Timer with the PTO timer (#2648, #2658, #2886)
* Move ACK generation text to transport draft (#1860, #2916) * Move ACK generation text to transport draft (#1860, #2916)
C.5. Since draft-ietf-quic-recovery-21 C.6. Since draft-ietf-quic-recovery-21
* No changes * No changes
C.6. Since draft-ietf-quic-recovery-20 C.7. Since draft-ietf-quic-recovery-20
* Path validation can be used as initial RTT value (#2644, #2687) * Path validation can be used as initial RTT value (#2644, #2687)
* max_ack_delay transport parameter defaults to 0 (#2638, #2646) * max_ack_delay transport parameter defaults to 0 (#2638, #2646)
* Ack Delay only measures intentional delays induced by the * Ack Delay only measures intentional delays induced by the
implementation (#2596, #2786) implementation (#2596, #2786)
C.7. Since draft-ietf-quic-recovery-19 C.8. Since draft-ietf-quic-recovery-19
* Change kPersistentThreshold from an exponent to a multiplier * Change kPersistentThreshold from an exponent to a multiplier
(#2557) (#2557)
* Send a PING if the PTO timer fires and there's nothing to send * Send a PING if the PTO timer fires and there's nothing to send
(#2624) (#2624)
* Set loss delay to at least kGranularity (#2617) * Set loss delay to at least kGranularity (#2617)
* Merge application limited and sending after idle sections. Always * Merge application limited and sending after idle sections. Always
skipping to change at page 37, line 13 skipping to change at page 37, line 16
packet is ack-eliciting but the largest_acked is not (#2592) packet is ack-eliciting but the largest_acked is not (#2592)
* Don't arm the handshake timer if there is no handshake data * Don't arm the handshake timer if there is no handshake data
(#2590) (#2590)
* Clarify that the time threshold loss alarm takes precedence over * Clarify that the time threshold loss alarm takes precedence over
the crypto handshake timer (#2590, #2620) the crypto handshake timer (#2590, #2620)
* Change initial RTT to 500ms to align with RFC6298 (#2184) * Change initial RTT to 500ms to align with RFC6298 (#2184)
C.8. Since draft-ietf-quic-recovery-18 C.9. Since draft-ietf-quic-recovery-18
* Change IW byte limit to 14720 from 14600 (#2494) * Change IW byte limit to 14720 from 14600 (#2494)
* Update PTO calculation to match RFC6298 (#2480, #2489, #2490) * Update PTO calculation to match RFC6298 (#2480, #2489, #2490)
* Improve loss detection's description of multiple packet number * Improve loss detection's description of multiple packet number
spaces and pseudocode (#2485, #2451, #2417) spaces and pseudocode (#2485, #2451, #2417)
* Declare persistent congestion even if non-probe packets are sent * Declare persistent congestion even if non-probe packets are sent
and don't make persistent congestion more aggressive than RTO and don't make persistent congestion more aggressive than RTO
verified was (#2365, #2244) verified was (#2365, #2244)
* Move pseudocode to the appendices (#2408) * Move pseudocode to the appendices (#2408)
* What to send on multiple PTOs (#2380) * What to send on multiple PTOs (#2380)
C.9. Since draft-ietf-quic-recovery-17 C.10. Since draft-ietf-quic-recovery-17
* After Probe Timeout discard in-flight packets or send another * After Probe Timeout discard in-flight packets or send another
(#2212, #1965) (#2212, #1965)
* Endpoints discard initial keys as soon as handshake keys are * Endpoints discard initial keys as soon as handshake keys are
available (#1951, #2045) available (#1951, #2045)
* 0-RTT state is discarded when 0-RTT is rejected (#2300) * 0-RTT state is discarded when 0-RTT is rejected (#2300)
* Loss detection timer is cancelled when ack-eliciting frames are in * Loss detection timer is cancelled when ack-eliciting frames are in
skipping to change at page 37, line 49 skipping to change at page 38, line 4
* Loss detection timer is cancelled when ack-eliciting frames are in * Loss detection timer is cancelled when ack-eliciting frames are in
flight (#2117, #2093) flight (#2117, #2093)
* Packets are declared lost if they are in flight (#2104) * Packets are declared lost if they are in flight (#2104)
* After becoming idle, either pace packets or reset the congestion * After becoming idle, either pace packets or reset the congestion
controller (#2138, 2187) controller (#2138, 2187)
* Process ECN counts before marking packets lost (#2142) * Process ECN counts before marking packets lost (#2142)
* Mark packets lost before resetting crypto_count and pto_count * Mark packets lost before resetting crypto_count and pto_count
(#2208, #2209) (#2208, #2209)
* Congestion and loss recovery state are discarded when keys are * Congestion and loss recovery state are discarded when keys are
discarded (#2327) discarded (#2327)
C.10. Since draft-ietf-quic-recovery-16 C.11. Since draft-ietf-quic-recovery-16
* Unify TLP and RTO into a single PTO; eliminate min RTO, min TLP * Unify TLP and RTO into a single PTO; eliminate min RTO, min TLP
and min crypto timeouts; eliminate timeout validation (#2114, and min crypto timeouts; eliminate timeout validation (#2114,
#2166, #2168, #1017) #2166, #2168, #1017)
* Redefine how congestion avoidance in terms of when the period * Redefine how congestion avoidance in terms of when the period
starts (#1928, #1930) starts (#1928, #1930)
* Document what needs to be tracked for packets that are in flight * Document what needs to be tracked for packets that are in flight
(#765, #1724, #1939) (#765, #1724, #1939)
skipping to change at page 38, line 39 skipping to change at page 38, line 41
* Limit ack_delay by max_ack_delay (#2060, #2099) * Limit ack_delay by max_ack_delay (#2060, #2099)
* Initial keys are discarded once Handshake keys are available * Initial keys are discarded once Handshake keys are available
(#1951, #2045) (#1951, #2045)
* Reorder ECN and loss detection in pseudocode (#2142) * Reorder ECN and loss detection in pseudocode (#2142)
* Only cancel loss detection timer if ack-eliciting packets are in * Only cancel loss detection timer if ack-eliciting packets are in
flight (#2093, #2117) flight (#2093, #2117)
C.11. Since draft-ietf-quic-recovery-14 C.12. Since draft-ietf-quic-recovery-14
* Used max_ack_delay from transport params (#1796, #1782) * Used max_ack_delay from transport params (#1796, #1782)
* Merge ACK and ACK_ECN (#1783) * Merge ACK and ACK_ECN (#1783)
C.12. Since draft-ietf-quic-recovery-13 C.13. Since draft-ietf-quic-recovery-13
* Corrected the lack of ssthresh reduction in CongestionEvent * Corrected the lack of ssthresh reduction in CongestionEvent
pseudocode (#1598) pseudocode (#1598)
* Considerations for ECN spoofing (#1426, #1626) * Considerations for ECN spoofing (#1426, #1626)
* Clarifications for PADDING and congestion control (#837, #838, * Clarifications for PADDING and congestion control (#837, #838,
#1517, #1531, #1540) #1517, #1531, #1540)
* Reduce early retransmission timer to RTT/8 (#945, #1581) * Reduce early retransmission timer to RTT/8 (#945, #1581)
* Packets are declared lost after an RTO is verified (#935, #1582) * Packets are declared lost after an RTO is verified (#935, #1582)
C.13. Since draft-ietf-quic-recovery-12 C.14. Since draft-ietf-quic-recovery-12
* Changes to manage separate packet number spaces and encryption * Changes to manage separate packet number spaces and encryption
levels (#1190, #1242, #1413, #1450) levels (#1190, #1242, #1413, #1450)
* Added ECN feedback mechanisms and handling; new ACK_ECN frame * Added ECN feedback mechanisms and handling; new ACK_ECN frame
(#804, #805, #1372) (#804, #805, #1372)
C.14. Since draft-ietf-quic-recovery-11 C.15. Since draft-ietf-quic-recovery-11
No significant changes. No significant changes.
C.15. Since draft-ietf-quic-recovery-10 C.16. Since draft-ietf-quic-recovery-10
* Improved text on ack generation (#1139, #1159) * Improved text on ack generation (#1139, #1159)
* Make references to TCP recovery mechanisms informational (#1195) * Make references to TCP recovery mechanisms informational (#1195)
* Define time_of_last_sent_handshake_packet (#1171) * Define time_of_last_sent_handshake_packet (#1171)
* Added signal from TLS the data it includes needs to be sent in a * Added signal from TLS the data it includes needs to be sent in a
Retry packet (#1061, #1199) Retry packet (#1061, #1199)
* Minimum RTT (min_rtt) is initialized with an infinite value * Minimum RTT (min_rtt) is initialized with an infinite value
(#1169) (#1169)
C.16. Since draft-ietf-quic-recovery-09 C.17. Since draft-ietf-quic-recovery-09
No significant changes. No significant changes.
C.17. Since draft-ietf-quic-recovery-08 C.18. Since draft-ietf-quic-recovery-08
* Clarified pacing and RTO (#967, #977) * Clarified pacing and RTO (#967, #977)
C.18. Since draft-ietf-quic-recovery-07 C.19. Since draft-ietf-quic-recovery-07
* Include Ack Delay in RTO(and TLP) computations (#981) * Include Ack Delay in RTO(and TLP) computations (#981)
* Ack Delay in SRTT computation (#961) * Ack Delay in SRTT computation (#961)
* Default RTT and Slow Start (#590) * Default RTT and Slow Start (#590)
* Many editorial fixes. * Many editorial fixes.
C.19. Since draft-ietf-quic-recovery-06 C.20. Since draft-ietf-quic-recovery-06
No significant changes. No significant changes.
C.20. Since draft-ietf-quic-recovery-05 C.21. Since draft-ietf-quic-recovery-05
* Add more congestion control text (#776) * Add more congestion control text (#776)
C.21. Since draft-ietf-quic-recovery-04 C.22. Since draft-ietf-quic-recovery-04
No significant changes. No significant changes.
C.22. Since draft-ietf-quic-recovery-03 C.23. Since draft-ietf-quic-recovery-03
No significant changes. No significant changes.
C.23. Since draft-ietf-quic-recovery-02 C.24. Since draft-ietf-quic-recovery-02
* Integrate F-RTO (#544, #409) * Integrate F-RTO (#544, #409)
* Add congestion control (#545, #395) * Add congestion control (#545, #395)
* Require connection abort if a skipped packet was acknowledged * Require connection abort if a skipped packet was acknowledged
(#415) (#415)
* Simplify RTO calculations (#142, #417) * Simplify RTO calculations (#142, #417)
C.24. Since draft-ietf-quic-recovery-01 C.25. Since draft-ietf-quic-recovery-01
* Overview added to loss detection * Overview added to loss detection
* Changes initial default RTT to 100ms * Changes initial default RTT to 100ms
* Added time-based loss detection and fixes early retransmit * Added time-based loss detection and fixes early retransmit
* Clarified loss recovery for handshake packets * Clarified loss recovery for handshake packets
* Fixed references and made TCP references informative * Fixed references and made TCP references informative
C.25. Since draft-ietf-quic-recovery-00 C.26. Since draft-ietf-quic-recovery-00
* Improved description of constants and ACK behavior * Improved description of constants and ACK behavior
C.26. Since draft-iyengar-quic-loss-recovery-01 C.27. Since draft-iyengar-quic-loss-recovery-01
* Adopted as base for draft-ietf-quic-recovery * Adopted as base for draft-ietf-quic-recovery
* Updated authors/editors list * Updated authors/editors list
* Added table of contents * Added table of contents
Appendix D. Contributors Appendix D. Contributors
The IETF QUIC Working Group received an enormous amount of support The IETF QUIC Working Group received an enormous amount of support
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