A Comparison between SCTP and QUIC
draft-joseph-quic-comparison-quic-sctp-00

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QUIC working group                                             A. Joseph
Internet-Draft                                                     T. Li
Intended status: Informational                                      UCLA
Expires: September 6, 2018                                         Z. He
                                                                  Y. Cui
                                                     Tsinghua University
                                                                L. Zhang
                                                                    UCLA
                                                           March 5, 2018

                   A Comparison between SCTP and QUIC
               draft-joseph-quic-comparison-quic-sctp-00

Abstract

   To cumulate design lessons from our protocol development efforts,
   this document provides a preliminary comparison between two transport
   protocol designs, Stream Control Transport Protocol (SCTP) and Quick
   UDP Internet Connections (QUIC).  We identify their commonalities and
   differences, summarize the characteristics of QUIC which we believe
   represent progresses in transport protocol designs.  We hope this
   draft useful in helping others to gain further understanding of both
   SCTP and QUIC, and in future protocol design efforts.

Status of This Memo

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   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.

Joseph, et al.          Expires September 6, 2018               [Page 1]
Internet-Draft          QUIC and SCTP comparison              March 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  A High Level Overview of the Two Protocols  . . . . . . . . .   4
     3.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  A Comparative Examination of Specific Protocol Mechanisms . .   5
     4.1.  Packet Structure  . . . . . . . . . . . . . . . . . . . .   5
       4.1.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .   5
       4.1.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  Connection Setup  . . . . . . . . . . . . . . . . . . . .   8
       4.2.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .   9
       4.2.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  10
     4.3.  Substreams  . . . . . . . . . . . . . . . . . . . . . . .  11
       4.3.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .  12
       4.3.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  12
     4.4.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .  13
       4.4.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .  14
       4.4.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  14
     4.5.  Reliability and Congestion Control  . . . . . . . . . . .  14
       4.5.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .  15
       4.5.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  16
     4.6.  Flow Control  . . . . . . . . . . . . . . . . . . . . . .  17
       4.6.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .  18
       4.6.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  18
     4.7.  Connection Teardown . . . . . . . . . . . . . . . . . . .  19
       4.7.1.  SCTP  . . . . . . . . . . . . . . . . . . . . . . . .  19
       4.7.2.  QUIC  . . . . . . . . . . . . . . . . . . . . . . . .  19
     4.8.  Other Differences between QUIC and SCTP . . . . . . . . .  19
   5.  Current Situations of SCTP and QUIC . . . . . . . . . . . . .  20
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