Multipath Extension for QUIC
draft-deconinck-quic-multipath-00

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02

QUIC Working Group                                         Q. De Coninck
Internet-Draft                                            O. Bonaventure
Intended status: Standards Track                               UCLouvain
Expires: September 6, 2018                                 March 5, 2018

                      Multipath Extension for QUIC
                   draft-deconinck-quic-multipath-00

Abstract

   This document proposes extensions to the QUIC protocol to enable the
   usage of multiple paths over a single connection.  Those changes
   remain compliant with the current single-path QUIC design.  They
   allow devices to benefit from multiple network paths while preserving
   the privacy features of QUIC.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 6, 2018.

Copyright Notice

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

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

De Coninck & BonaventureExpires September 6, 2018               [Page 1]
Internet-Draft                   MP-QUIC                      March 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions and Definitions . . . . . . . . . . . . . . . . .   3
     2.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  What is a Path? . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Beyond Connection Migration . . . . . . . . . . . . . . .   5
     3.3.  Establishment of a Multipath QUIC Connection  . . . . . .   6
     3.4.  Architecture of Multipath QUIC  . . . . . . . . . . . . .   7
     3.5.  Path Establishment  . . . . . . . . . . . . . . . . . . .   7
     3.6.  Exchanging Data over Multiple Paths . . . . . . . . . . .   8
     3.7.  Exchanging Addresses  . . . . . . . . . . . . . . . . . .   9
     3.8.  Coping with Address Removals  . . . . . . . . . . . . . .  10
     3.9.  Path Migration  . . . . . . . . . . . . . . . . . . . . .  10
     3.10. Congestion Control  . . . . . . . . . . . . . . . . . . .  11
   4.  Mapping Path ID to Connection ID  . . . . . . . . . . . . . .  11
   5.  Using Multiple Paths  . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Multipath Negotiation . . . . . . . . . . . . . . . . . .  12
       5.1.1.  Transport Parameter Definition  . . . . . . . . . . .  13
     5.2.  Variable-Length Encoding of the Path ID . . . . . . . . .  13
     5.3.  Coping with Additional Remote Addresses . . . . . . . . .  13
     5.4.  Path State  . . . . . . . . . . . . . . . . . . . . . . .  14
     5.5.  Dynamic Management of Paths . . . . . . . . . . . . . . .  16
     5.6.  Loosing Addresses . . . . . . . . . . . . . . . . . . . .  17
     5.7.  Scheduling Strategies . . . . . . . . . . . . . . . . . .  17
   6.  Modifications to QUIC frames  . . . . . . . . . . . . . . . .  18
     6.1.  NEW_CONNECTION_ID Frame . . . . . . . . . . . . . . . . .  18
     6.2.  ACK Frame . . . . . . . . . . . . . . . . . . . . . . . .  20
   7.  New Frames  . . . . . . . . . . . . . . . . . . . . . . . . .  20
     7.1.  MAX_PATHS Frame . . . . . . . . . . . . . . . . . . . . .  20
     7.2.  PATH_UPDATE Frame . . . . . . . . . . . . . . . . . . . .  21
     7.3.  ADD_ADDRESS Frame . . . . . . . . . . . . . . . . . . . .  22
     7.4.  REMOVE_ADDRESS Frame  . . . . . . . . . . . . . . . . . .  23
     7.5.  PATHS Frame . . . . . . . . . . . . . . . . . . . . . . .  23
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  25
     8.1.  Nonce Computation . . . . . . . . . . . . . . . . . . . .  25
     8.2.  Validation of Exchanged Addresses . . . . . . . . . . . .  25
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  26