A Transport Layer for Deterministic Networks
draft-thubert-tsvwg-detnet-transport-00

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TSVWG                                                    P. Thubert, Ed.
Internet-Draft                                                     Cisco
Intended status: Standards Track                        October 24, 2017
Expires: April 27, 2018

              A Transport Layer for Deterministic Networks
                draft-thubert-tsvwg-detnet-transport-00

Abstract

   This document specifies the behavior of a Transport Layer operating
   over a Deterministic Network and implementing a DetNet Service Layer
   and a Northbound side of the DetNet User-to-Network Interface.

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Thubert                  Expires April 27, 2018                 [Page 1]
Internet-Draft                  DetTrans                    October 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  On Deterministic Networking . . . . . . . . . . . . . . . . .   5
     3.1.  Applications and Requirements . . . . . . . . . . . . . .   5
     3.2.  The DetNet User-to-Network Interface (UNI)  . . . . . . .   7
     3.3.  The DetNet Stack  . . . . . . . . . . . . . . . . . . . .   8
     3.4.  The DetNet Service Model  . . . . . . . . . . . . . . . .   8
   4.  DetTrans Operations . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  DetTrans Overview . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Application Requirements  . . . . . . . . . . . . . . . .  10
       4.2.1.  Packet Normalization  . . . . . . . . . . . . . . . .  10
       4.2.2.  Packet Streaming  . . . . . . . . . . . . . . . . . .  10
     4.3.  Deterministic Flow Services . . . . . . . . . . . . . . .  10
       4.3.1.  Deterministic Flows . . . . . . . . . . . . . . . . .  10
       4.3.2.  Local Loop Flow Control . . . . . . . . . . . . . . .  11
         4.3.2.1.  Dichotomy of a DetNet End System  . . . . . . . .  11
         4.3.2.2.  Local Loop Location . . . . . . . . . . . . . . .  12
         4.3.2.3.  Network Pull vs. Rate Based Flow Control  . . . .  14
       4.3.3.  Load Sharing  . . . . . . . . . . . . . . . . . . . .  14
       4.3.4.  PRE vs. 1+1 Redundancy  . . . . . . . . . . . . . . .  15
       4.3.5.  Network Coding  . . . . . . . . . . . . . . . . . . .  15
       4.3.6.  Multipath DetTrans Services . . . . . . . . . . . . .  15
   5.  The DetNet-UNI  . . . . . . . . . . . . . . . . . . . . . . .  16
     5.1.  the "More" Message  . . . . . . . . . . . . . . . . . . .  17
     5.2.  the "Time-Correction" Message . . . . . . . . . . . . . .  17
     5.3.  Loss of a Control Message . . . . . . . . . . . . . . . .  18
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  19
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  19
   9.  Informative References  . . . . . . . . . . . . . . . . . . .  19
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   Over last twenty years, voice, data and video networks have converged
   to digital over IP.  Mail delivery has become quasi-immediate and
   volumes have multiplied; long distance voice is now mostly free and
   the videophone is finally a reality; TV is available on-demand and
   games became interactive and massively multi-player.  The convergence
   of highly heterogeneous networks over IP resulted in significant
   drops in price for the end-user while adding new distinct value to
   the related services.  Yet, and even though similar benefits can be
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