Dynamic Latency Guarantee
draft-liu-detnet-dynamic-latency-guarantee-01

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Deterministic Networking Working Group                            P. Liu
Internet-Draft                                                   L. Geng
Intended status: Informational                              China Mobile
Expires: January 9, 2020                                   July 08, 2019

                       Dynamic Latency Guarantee
             draft-liu-detnet-dynamic-latency-guarantee-01

Abstract

   Aiming at the deterministic demand for network latency in future
   vertical industry applications, this document analyzes the existing
   latency control methods for data transmission, points out the
   possible shortcomings, and proposes some directions for optimizing
   the latency control method. .

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on January 9, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

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   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Technologies of Latency Control . . . . . . . . . . . . . . .   2
     2.1.  IEEE 802.1Qav Forwarding and Queuing Enhancements for
           Time-Sensitive Streams  . . . . . . . . . . . . . . . . .   3
     2.2.  IEEE 802.1Qbv Enhancements for Scheduled Traffic  . . . .   3
     2.3.  IEEE 802.1Qbu Frame Preemption  . . . . . . . . . . . . .   3
   3.  Problems and Requirments  . . . . . . . . . . . . . . . . . .   3
     3.1.  Problems in Bounded Latency . . . . . . . . . . . . . . .   4
     3.2.  Requirments of Deterministic latency  . . . . . . . . . .   4
   4.  Solutions . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   New types of services such as AR/VR, V2X, industrial motion control,
   etc. have stringent requirements for latency and stability.  In order
   to meet those requirements, some network technologies such as time-
   sensitive network, deterministic network, etc., have proposed
   corresponding technical means to provide network bearers with
   deterministic latency and packet loss rate to guarantee the service
   experience.  TSN includes a set of standards developed by the IEEE
   802.1 Working Group's.  Deterministic network (DETNET) is based on
   the mechanism of TSN and committed to applying the method to the IP
   layer to provide more reliable and stable network transmission.  This
   document will present some problems when applying TSN in DETNET, and
   try to propose reference methods to solve the corresponding problems.

2.  Technologies of Latency Control

   Based on time synchronization, TSN has a range of bounded latency
   technologies.

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2.1.  IEEE 802.1Qav Forwarding and Queuing Enhancements for Time-
      Sensitive Streams
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