The Problem Statement for Precise Transport Networking
draft-xiong-rtgwg-precise-tn-problem-statement-00

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RTGWG                                                           Q. Xiong
Internet-Draft                                           ZTE Corporation
Intended status: Standards Track                                  P. Liu
Expires: October 26, 2020                                   China Mobile
                                                          April 24, 2020

         The Problem Statement for Precise Transport Networking
           draft-xiong-rtgwg-precise-tn-problem-statement-00

Abstract

   As described in [xiong-rtgwg-precise-tn-requirements], the
   deterministic networks not only need to offer the Service Level
   Agreements (SLA) guarantees such as low latency and jitter, low
   packet loss and high reliability, but also need to support the
   precise services such as flexible resource allocation and service
   isolation so as to the Precise Transport Networking.  However, under
   the existing IP network architecture with statistical multiplexing
   characteristics, the existing deterministic technologies are facing
   long-distance transmission, queue scheduling, dynamic flows and per-
   flow state maintenance and other controversial issues especially in
   Wide Area Network (WAN) applications.

   This document analyses the problems in existing deterministic
   technologies to provide precise services in various industries such
   as 5G networks.

Status of This Memo

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   This Internet-Draft will expire on October 26, 2020.

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Copyright Notice

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions used in this document . . . . . . . . . . . . . .   4
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   3.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Problem with Traffic Scheduling Mechanisms  . . . . . . .   4
     3.2.  Problem with Long-distance Transmission Delay and Jitter    5
     3.3.  Problem with SLA Guarantees of Dynamic Flows  . . . . . .   5
     3.4.  Problem with Service Isolation  . . . . . . . . . . . . .   6
     3.5.  Problem with Precise Resource Allocation  . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

1.1.  Overview

   5G network is oriented to the internet of everything.  In addition to
   the Enhanced Mobile Broadband (eMBB) and Massive Machine Type
   Communications(mMTC) services, it also supports the Ultra-reliable
   Low Latency Communications (uRLLC) services.  The uRLLC services
   cover the industries such as intelligent electrical network,
   intelligent factory, internet of vehicles, industry automation and
   other industrial internet scenarios, which is the key demand of
   digital transformation of vertical domains.  These uRLLC services

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   demand SLA guarantees such as low latency and high reliability and
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