Abstract
The digital revolution affects every aspect of society and economy. In particular, the manufacturing industry faces a new age of production processes and connected collaboration. The underlying ideas and concepts, often also framed as a new “Internet of Things”, transfer IT technologies to the shop floor, entailing major challenges regarding the heterogeneity of the domain. On the other hand, web technologies have already proven their value in distributed settings. SOLID (derived from “social linked data”) is a recent approach to decentralize data control and standardize interactions for social applications in the web. Extending this approach towards industrial applications has the potential to bridge the gap between the World Wide Web and local manufacturing environments. This paper proposes SOLIOT—a combination of lightweight industrial protocols with the integration and data control provided by SOLID. An in-depth requirement analysis examines the potential but also current limitations of the approach. The conceptual capabilities are outlined, compared and extended for the IoT protocols CoAP and MQTT. The feasibility of the approach is illustrated through an open-source implementation, which is evaluated in a virtual test bed and a detailed analysis of the proposed components.
Highlights
Technologies and practices from the Web increasingly find their way into industrial manufacturing processes
At the core of the proposed SOLIOT approach is the combination of the uniform interfaces of the Linked Data Platform (LDP) specification with the mature access control regime as defined by SOLID with the restricted resources of Internet of Things (IoT) applications
This paper presents SOLIOT, an approach to merge concepts following Linked Data Platform and SOLID patterns aligned with IoT requirements
Summary
Technologies and practices from the Web increasingly find their way into industrial manufacturing processes. Regarding the distributed character of IoT scenarios is crucial for any implementation This requires clear interaction patterns, interfaces and a shared understanding of the meaning and implications of entities, states, and interactions. SOLIOT presents a Digital Twin concept primarily based on the standardized Web of Things data model, the self-descriptive interaction patterns of LDP and the data protection mechanism as developed by the SOLID approach. Several works have already translated the concepts and patterns for Web-based architectures and map them to IoT protocols This work extends these activities with the following core contributions:. The mapping of SOLID features to two different IoT protocols, the Message Queuing Telemetry Transport (MQTT, [3]) and the Constraint Application Protocol (CoAP, [4]) illustrates the potential of SOLIOT Both protocols explicitly target different communication patterns.
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