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

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QUIC Working Group                                         Q. De Coninck
Internet-Draft                                            O. Bonaventure
Intended status: Standards Track                               UCLouvain
Expires: May 3, 2018                                    October 30, 2017

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

Abstract

   Multipath TCP has shown how a reliable transport protocol can
   efficiently use multiple paths for a given connection.  We leverage
   the experience gained with Multipath TCP to propose simple extensions
   that enable QUIC to efficiently use multiple paths during the
   lifetime of a QUIC connection.

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De Coninck & Bonaventure   Expires May 3, 2018                  [Page 1]
Internet-Draft                   MP-QUIC                    October 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions and Definitions . . . . . . . . . . . . . . . . .   3
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  What is a Path? . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Going Further than Connection Migration . . . . . . . . .   4
     3.3.  Starting a Multipath QUIC Connection  . . . . . . . . . .   6
     3.4.  Multipath QUIC Architecture . . . . . . . . . . . . . . .   7
     3.5.  Exchanging Data over Multiple Paths . . . . . . . . . . .   7
     3.6.  Starting to Use Paths . . . . . . . . . . . . . . . . . .   8
     3.7.  Communicating New Addresses . . . . . . . . . . . . . . .   9
     3.8.  Path Migration  . . . . . . . . . . . . . . . . . . . . .   9
     3.9.  Coping with Address Removals  . . . . . . . . . . . . . .  10
     3.10. Congestion Control  . . . . . . . . . . . . . . . . . . .  11
   4.  Packet Format Changes . . . . . . . . . . . . . . . . . . . .  11
   5.  Using Multiple Paths  . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Multipath Negotiation . . . . . . . . . . . . . . . . . .  12
       5.1.1.  Transport Parameter Definition  . . . . . . . . . . .  13
     5.2.  Path State  . . . . . . . . . . . . . . . . . . . . . . .  13
   6.  Modifications to QUIC frames  . . . . . . . . . . . . . . . .  14
     6.1.  ACK Frame . . . . . . . . . . . . . . . . . . . . . . . .  14
   7.  New Frames  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     7.1.  ADD_ADDRESS Frame . . . . . . . . . . . . . . . . . . . .  15
     7.2.  REMOVE_ADDRESS Frame  . . . . . . . . . . . . . . . . . .  16
     7.3.  PATHS Frame . . . . . . . . . . . . . . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
     8.1.  Nonce Computation . . . . . . . . . . . . . . . . . . . .  17
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
     9.1.  QUIC Transport Parameter Registry . . . . . . . . . . . .  18
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  18
     10.2.  Informative References . . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  20

1.  Introduction

   Endhosts have evolved.  Today's endhosts are equipped with several
   network interfaces and users expect to be able to seamlessly switch
   from one to another or use them simultaneously to aggregate
   bandwidth.  During the last years, several multipath extensions to
   transport protocols have been proposed [RFC6824],[MPRTP],[SCTPCMT].
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