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Improving OPC UA Publish-Subscribe Mechanism over UDP with Synchronization Algorithm and Multithreading Broker
Alexandru Ioana1, Adrian Korodi1
1Department of Automation and Applied Informatics, Faculty of Automation and Computers, University Politehnica Timisoara, 300223 Timisoara, Romania.
Sensors (Basel, Switzerland)
|October 2, 2020
Summary
This study enhances Open Platform Communication Unified Architecture (OPC UA) interfacing for Industry 4.0 and Industrial Internet of Things (IIoT) using Publish-Subscribe over User Datagram Protocol (UDP). The developed solution improves real-time responsiveness and efficiency for industrial communication.
Area of Science:
- Industrial automation and control systems.
- Industrial Internet of Things (IIoT) and Industry 4.0.
- Communication protocols and network engineering.
Background:
- Industry 4.0 and IIoT rely on robust communication protocols for interfacing and interoperability.
- Open Platform Communication Unified Architecture (OPC UA) is a key technology, but requires enhancements for real-time applications.
- Existing OPC UA implementations face challenges with real-time constraints, data volume, and computational footprint.
Purpose of the Study:
- To improve OPC UA interfacing by integrating Publish-Subscribe (Pub/Sub) mechanisms.
- To address real-time constraints and optimize role distribution for industrial communication.
- To leverage automotive sector interfacing strategies for enhanced OPC UA performance.
Main Methods:
- Conceptual analysis of OPC UA interfacing using Pub/Sub.
- Development of a synchronization algorithm for real-time responsiveness.
- Implementation of a multithreading broker application for increased efficiency.
- Utilizing OPC UA Pub/Sub over User Datagram Protocol (UDP).
Main Results:
- Achieved real-time responsiveness in OPC UA communication.
- Demonstrated increased efficiency by reducing publisher and subscriber footprint.
- Successfully managed larger data volumes for multiple subscribers.
- Reduced network and service load by optimizing polling and filtering.
Conclusions:
- The proposed solution significantly enhances OPC UA Pub/Sub over UDP for real-time industrial applications.
- The developed synchronization algorithm and broker application improve efficiency and reduce computational effort.
- This approach offers a viable path for advanced industrial communication in Industry 4.0 and IIoT environments.
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