Dynamic Latency Guarantee
draft-liu-detnet-dynamic-latency-guarantee-00

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Deterministic Networking Working Group                            P. Liu
Internet-Draft                                                   L. Geng
Intended status: Informational                              China Mobile
Expires: September 11, 2019                               March 10, 2019

                       Dynamic Latency Guarantee
             draft-liu-detnet-dynamic-latency-guarantee-00

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.

   Internet-Drafts are working documents of the Internet Engineering
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

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   This Internet-Draft will expire on September 11, 2019.

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
   to this document.  Code Components extracted from this document must
   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.  Core Technology of Bounded Latency  . . . . . . . . . . . . .   3
     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  . . . . . . . . . . . . . . . . . .   4
     3.1.  Problems  . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Requirments . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Solutions . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Dynamic Latency Guarantee . . . . . . . . . . . . . . . .   6
     4.2.  Feedback System . . . . . . . . . . . . . . . . . . . . .   7
   5.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   With the vigorous development of 5G and industrial Internet, network
   technology has become more and more important to support new types of
   services, such as AR/VR, V2X, industrial motion control, etc., which
   have stringent requirements for latency and stability.  In order to
   meet the requirements of the above applications, new network
   technologies such as time-sensitive network TSN, deterministic
   network DETNET, etc., have proposed corresponding technical means to
   provide network bearers with deterministic latency and packet loss
   rate and guarantee the user's business experience.

   TSN includes a set of standards developed by the IEEE 802.1 Working
   Group's.  The TSN task group inherited from the previous Audio/Video
   Bridging working group and has expanded its applications to in-
   vehicle, industrial, and mobile networks.  Deterministic network
   (DETNET) is based on the mechanism of TSN.  The difference is that
   TSN is applied to the data link layer and below.  DETNET is committed

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