Technical Requirements of Bounded Latency in Large-scale DetNet Deployment
draft-geng-detnet-requirements-bounded-latency-00

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Network Working Group                                            L. Geng
Internet-Draft                                                   L. Wang
Intended status: Informational                              China Mobile
Expires: January 3, 2019                                        L. Qiang
                                                     Huawei Technologies
                                                            July 2, 2018

    Technical Requirements of Bounded Latency in Large-scale DetNet
                               Deployment
           draft-geng-detnet-requirements-bounded-latency-00

Abstract

   This document summarizes the technical requirements of bounded
   latency of DetNet system in large-scale deployment.

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   This Internet-Draft will expire on January 3, 2019.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology & Abbreviations . . . . . . . . . . . . . . .   3
   2.  End-to-end bounded latency requirements . . . . . . . . . . .   3
   3.  Tolerance of time deviation . . . . . . . . . . . . . . . . .   4
   4.  Massive number of deterministic flows . . . . . . . . . . . .   4
   5.  Stable jitter with long transmission delay  . . . . . . . . .   4
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   Deterministic Networking (DetNet) enables the transmission of
   specific data flows in large scale networks with extremely low data
   loss rates and bounded latency. [draft-ietf-detnet-problem-statement]
   outlines the problems that need to be resolved in DetNet, and
   [draft-ietf-detnet-use-cases] presents the use cases in which DetNet
   deployment is found beneficial and useful.

   In DetNet WG, many of the technical requirements and solution have
   been discussed In order to achieve deterministic networking
   performance in large-scale network.  This mainly include the
   following aspect.

   o  DetNet Definition and architecture are discussed in
      [draft-ietf-detnet-architecture]

   o  Encapsulation methods are discussed in[draft-ietf-detnet-dp-sol]
      with specific mechanisms for identification of DetNet services and
      approaches for reliable transmission (i.e.  Replication of
      packets).

   o  Security requirements are specially discussed in
      [draft-ietf-detnet-security].

   To some extend, TSN is assumed to be used for Layer 2 underlay for
   DetNet services to guarantee the bounded latency performance.
   However, TSN is originally designed for LAN scenario which suffers
   from scalability problems (i.e. end-to-end time synchronization,
   sensitive jitter performance subject to transmission latency).
   Meanwhile, it is also considered challenging to using MPLS/IP
   encapsulation for DetNet service in which the forwarding plane is
   purely based on Layer 2 TSN technology.  There is yet a document

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   which specifically discusses the requirements of bounded latency with
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