Requirements Analysis for OPC UA over CoAP
draft-wang-core-opcua-transmition-requirements-01
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Core H. Wang
Internet Draft C. Pu
Intended status: Standards Track P. Wang
Expires: December 23, 2017 Y. Yang
D. Xiong
Chongqing University of
Posts and Telecommunications
June 21, 2017
Requirements Analysis for OPC UA over CoAP
draft-wang-core-opcua-transmition-requirements-01
Abstract
Constrained Application Protocol (CoAP) is a application protocol
for use with constrained nodes and constrained networks that is
attractive to be applied In the Industrial Internet of Things (IIoT).
OPC Unified Architecture (OPC UA) defines a semantic-based
information model for industrial control system that can satisfy the
requirements of Industry 4.0, which is based on semantic information
exchange. This document analyses requirements for transmitting OPC
UA over CoAP.
Status of this Memo
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This Internet-Draft will expire on December 23, 2017.
Wang, et al. Expires December 23, 2017 [Page 1]
Internet-Draft OPC UA Over CoAP June 2017
Copyright Notice
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Table of Contents
1. Introduction ................................................ 2
2. Architecture of OPC UA over CoAP ............................ 3
3. Requirements for OPC UA over CoAP ........................... 4
3.1. Encoding ............................................... 4
3.2. Application Sublayer Optimization ...................... 4
3.3. Consistency ............................................ 4
3.4. Reliability ............................................ 5
4. Security Considerations ..................................... 5
5. IANA Considerations ......................................... 6
6. References .................................................. 6
6.1. Normative References ................................... 6
6.2. Informative References ................................. 6
Authors' Addresses ............................................. 7
1. Introduction
CoAP is a web application protocol designed for resource constrained
devices and constrained networks that has been widely used in
machine-to-machine (M2M) communications [RFC7252].The purpose of
applying CoAP to the Industrial Internet of Things (IIoT) is to
provide connectivity for the devices. Whereas the communication of
Industry 4.0 not only requires data value transmission, but also
requires semantic information exchange. Driven by this, to use CoAP
in the IIoT, there is a need to provide good support for messages
transmission of the application layer in the automation field.
According to the definition of Industry 4.0 for communication, CoAP
needs to support the exchange of semantic information, namely the
semantic information model. For the current protocols supporting
semantic information model in the IIoT, the information model
defined by OPC UA [IEC TR 62541-1] is very promising and its
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