Considerations for Unreliable Streams in QUIC
draft-tiesel-quic-unreliable-streams-01

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QUIC Working Group                                             P. Tiesel
Internet-Draft                                                 M. Palmer
Intended status: Informational                         B. Chandrasekaran
Expires: May 3, 2018                                         A. Feldmann
                                                               TU Berlin
                                                                  J. Ott
                                                               TU Munich
                                                        October 30, 2017

             Considerations for Unreliable Streams in QUIC
                draft-tiesel-quic-unreliable-streams-01

Abstract

   This memo outlines how to support unreliable streams as well as
   partially-reliable streams within QUIC.  The intention of this
   document is to collect requirements and considerations, to frame the
   design space, and to give an example how unreliable stream support
   could be realized.

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
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   This Internet-Draft will expire on May 3, 2018.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Conventions and Definitions . . . . . . . . . . . . . . . . .   2
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Modes of Unreliable Transmission  . . . . . . . . . . . . . .   3
   4.  Protocol Considerations . . . . . . . . . . . . . . . . . . .   3
     4.1.  Unreliable Stream Support Negotiation . . . . . . . . . .   4
     4.2.  Stream as a Message . . . . . . . . . . . . . . . . . . .   4
     4.3.  Stream ID 0x0 . . . . . . . . . . . . . . . . . . . . . .   4
     4.4.  Congestion Control on Unreliable Streams  . . . . . . . .   4
     4.5.  Flow Control on Unreliable Streams  . . . . . . . . . . .   4
     4.6.  Stream Open . . . . . . . . . . . . . . . . . . . . . . .   5
     4.7.  Retransmission of Partially-Reliable Stream Data  . . . .   5
     4.8.  Stream Close  . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Application Interface Considerations  . . . . . . . . . . . .   5
     5.1.  Retransmissions within Unreliable Streams . . . . . . . .   5
     5.2.  Presentation of Unreliable Streams  . . . . . . . . . . .   6
     5.3.  Prioritization of Unreliable Streams  . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Informative References  . . . . . . . . . . . . . . . . . . .   7
   Appendix A.  Implemenation Proposal . . . . . . . . . . . . . . .   8
     A.1.  Stream Identifiers  . . . . . . . . . . . . . . . . . . .   8
     A.2.  Stream Close  . . . . . . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Conventions and Definitions

   The words "MUST", "MUST NOT", "SHALL", "SHALL NOT", "SHOULD", and
   "MAY" are used in this document.  It's not shouting; when these words
   are capitalized, they have a special meaning as defined in [RFC2119].

2.  Introduction

   This memo describes how QUIC can provide reliable, partially-
   reliable, and unreliable transmissions within the same connection.
   There are many use cases for unreliable delivery of stream data,
   e.g., to meet deadlines for data delivery in the presence of short-
   time congestion by avoiding head-of-line blocking.  For partial
   reliable streams, the sender can decide which frames to retransmit.