Coding for QUIC
draft-swett-nwcrg-coding-for-quic-01

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Last updated 2018-06-22
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nwcrg                                                           I. Swett
Internet-Draft                                                    Google
Intended status: Informational                            M-J. Montpetit
Expires: December 23, 2018                                Triangle Video
                                                                 V. Roca
                                                                   INRIA
                                                           June 21, 2018

                            Coding for QUIC
                  draft-swett-nwcrg-coding-for-quic-01

Abstract

   This document focusses on the integration of FEC coding in the QUIC
   transport protocol, in order to recover from packet losses.  This
   document does not specify any FEC code but defines mechanisms to
   negotiate and integrate FEC Schemes in QUIC.  By using proactive loss
   recovery, it is expected to improve QUIC performance in sessions
   impacted by packet losses.  More precisely it is expected to improve
   QUIC performance with real-time sessions (since FEC coding makes
   packet loss recovery insensitive to the round trip time), with
   multicast sessions (since the same repair packet can recover several
   different losses at several receivers), and with multipath sessions
   (since repair packets add diversity).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on December 23, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Swett, et al.           Expires December 23, 2018               [Page 1]
Internet-Draft               Coding for QUIC                   June 2018

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Definitions and Abbreviations . . . . . . . . . . . . . . . .   3
   3.  General Design Considerations . . . . . . . . . . . . . . . .   4
     3.1.  FEC Code versus FEC Scheme, Block Codes versus Sliding
           Window Codes  . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  FEC Scheme Negotiation  . . . . . . . . . . . . . . . . .   4
     3.3.  FEC Protection Within an Encrypted Channel  . . . . . . .   5
     3.4.  About Middleboxes . . . . . . . . . . . . . . . . . . . .   5
     3.5.  FEC Protection at the Stream Level  . . . . . . . . . . .   5
     3.6.  About Gaps in the Set of Source Symbols Considered During
           Encoding  . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  FEC Scheme Negotiation in QUIC  . . . . . . . . . . . . . . .   6
     4.1.  FEC Scheme Selection Process  . . . . . . . . . . . . . .   7
     4.2.  FEC Scheme Configuration Information  . . . . . . . . . .   7
   5.  Procedures when Protecting a Single QUIC Stream . . . . . . .   8
     5.1.  Application data, STREAM Frame data and Source Symbols  .   8
     5.2.  Signaling Considerations within STREAM and REPAIR Frames    9
     5.3.  Management of Silent Periods and End of Stream  . . . . .  10
   6.  Procedures when Protecting Several QUIC Streams . . . . . . .  11
     6.1.  Application data, STREAM Frame data and Source Symbols  .  11
     6.2.  Block or Encoding Window Management . . . . . . . . . . .  11
     6.3.  Signaling Considerations within STREAM and REPAIR Frames   12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  13
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     10.2.  Informative References . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14
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