Requirements Analysis for OPC UA over CoAP
draft-wang-core-opcua-transmition-requirements-00
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Core H. Wang
Internet Draft C. Pu
Interned status: Standards Track P. Wang
Expires: July 1, 2017 Y. Yang
D. Xiong
Chongqing University of
Posts and Telecommunications
December 28, 2016
Requirements Analysis for OPC UA over CoAP
draft-wang-core-opcua-transmition-requirements-00
Abstract
Industrial Internet of Things is an attractive application area for
Constrained Application Protocol (CoAP). OPC Unified Architecture
(OPC UA) defines a semantic-based information model for industrial
control system that can satisfy the requirements of Industry 4.0
based on semantic information exchange. This document analyses
requirements for OPC UA transmission 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 July 1, 2017.
Wang, et al. Expires July 1, 2017 [Page 1]
Internet-Draft OPC UA Over CoAP December 2016
Copyright Notice
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This document is subject to BCP 78 and the IETF Trust's Legal
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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 ......................................... 5
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 limited networks that has been widely used in machine-
to-machine (M2M) communications [RFC7252]. However, 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 is not only based on data transmission, but also based
on semantic information exchange. Driven by this, using CoAP in the
IIoT, there is a need to provide good support for data 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 62541-1] is very promising and its transmission mode is
Wang, et al. Expires July 1, 2017 [Page 2]
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