OPC UA Message Transmission Method over CoAP
draft-wang-core-opcua-transmission-03

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Last updated 2018-03-02
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CoRE                                                          P. Wang
Internet Draft                                                  C. Pu
Intended status: Standards Track                              H. Wang
Expires: September 4, 2018                                      J. Wu
                                                               Y.Yang
                                                              L. Shao
                                              Chongqing University of
                                         Posts and Telecommunications
                                                               J. Hou
                                                  Huawei Technologies
                                                       March 03, 2018

               OPC UA Message Transmission Method over CoAP
                   draft-wang-core-opcua-transmission-03

Abstract

   OPC Unified Architecture (OPC UA) is a data exchange specification
   that provides interoperability in industrial automation. With the
   arrival of Industry 4.0, it is of great importance to implement the
   exchange of semantic information utilizing OPC UA Transmitting in
   CoAP. This document provides some transmission methods for message
   of OPC UA over CoAP.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on September 4, 2018.

Wang, et al.          Expires September 4, 2018               [Page 1]
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   Copyright (c) 2018 IETF Trust and the persons identified as the
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Table of Contents

   1. Introduction ................................................ 2
      1.1. Conventions and Terminology ............................ 3
   2. Overview of OPC UA .......................................... 3
      2.1. Protocol Stack ......................................... 3
      2.2. Request/Response Model ................................. 5
   3. Specification of OPC UA over CoAP ........................... 6
   4. Transmission scheme ......................................... 7
      4.1. Direct transmission .................................... 7
      4.2. REST transmission for OPC UA ........................... 8
   5. Publish subscription for OPC UA over CoAP ................... 9
   6. Use Cases of OPC UA over CoAP ............................... 9
      6.1. Factory data monitoring based on web pages ............. 9
      6.2. Offline/Online diagnostic system for resource-constrained
      factories .................................................. 10
      6.3. Factory data analysis based on cloud .................. 11
   7. Security Considerations .................................... 11
   8. IANA Considerations ........................................ 11
   9. References ................................................. 11
      9.1. Normative References .................................. 11
      9.2. Informative References ................................ 12
   Authors' Addresses ............................................ 13

1. Introduction

   Internet of things is one of the attractive applications for CoAP
   [RFC7252]. Utilizing OPC UA [IEC TR 62541-1] Transmitting over CoAP
   could meet the demand for industry 4.0 based on the exchange of
   semantic information [I-D.wang-core-opcua-transmition-requirements].
   In resource-constrained scenarios, OPC UA can effectively use energy,
   improve productivity and shorten the product manufacturing cycle by

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