Traffic-Aware Configuration of OPC UA PubSub in Industrial Automation Networks

TL;DR

This paper proposes traffic-aware guidelines for configuring OPC UA PubSub in industrial networks to improve interoperability, real-time performance, and network reliability in Industry 4.0 environments.

Contribution

It introduces a novel set of guidelines for mapping industrial traffic types to PubSub configurations, addressing a key gap in current practices.

Findings

Proper configuration improves latency and throughput.

Incorrect configurations can cause performance degradation.

Traffic-aware configuration enhances interoperability.

Abstract

Interoperability across industrial automation systems is a cornerstone of Industry 4.0. To address this need, the OPC Unified Architecture (OPC UA) Publish-Subscribe (PubSub) model offers a promising mechanism for enabling efficient communication among heterogeneous devices. PubSub facilitates resource sharing and communication configuration between devices, but it lacks clear guidelines for mapping diverse industrial traffic types to appropriate PubSub configurations. This gap can lead to misconfigurations that degrade network performance and compromise real-time requirements. This paper proposes a set of guidelines for mapping industrial traffic types, based on their timing and quality-of-service specifications, to OPC UA PubSub configurations. The goal is to ensure predictable communication and support real-time performance in industrial networks. The proposed guidelines are evaluated through an industrial use case that demonstrates the impact of incorrect configuration on latency and throughput. The results underline the importance of traffic-aware PubSub configuration for achieving interoperability in Industry 4.0 systems.