ارتباطات دستگاه ها در صنعت شبکه های بی سیم
Abstract
1- Introduction
2- Background
3- Related work
4- Proposed solution
5- Performance evaluation
6- Conclusion and future work
References
Abstract
Internet of Things (IoT) and cyberphysical system (CPS) technologies play huge roles in the context of Industry 4.0. These technologies introduce cognitive automation to implement the concept of intelligent production, leading to smart products and services. One of the technological challenges related to Industry 4.0 is to provide support to big data cloud based applications which demand QoS-enabled Internet connectivity for information gathering, exchange, and processing. In order to deal with this challenge, in this article, a QoS-aware cloud based solution is proposed by adapting a recently proposed seamless resources sharing architecture to the IoT scenario. The resulting solution aims at improving device to cloud communications considering the coexistence of different wireless networks technologies, particularly in the domain of Industry 4.0. Results are obtained via simulations of three QoS demanding industrial applications. The outcomes of the simulations show that both delay and jitter QoS metrics are kept below their specific thresholds in the context of VoIP applications used for distributed manipulators fine tuning control. In the case of video-based production control, the jitter was controlled to meet the application demands, and even the throughput for best-effort supervisory systems HTTP access is guaranteed.
Introduction
Industry 4.0 introduces several changes to the original approach of industrial automation. IoT and CPS technologies play huge roles in this context introducing cognitive automation and consequently implementing the concept of intelligent production, leading to smart products and services (Drath and Horch, 2014). Besides the aforementioned technologies, Industry 4.0 typically relies on big-data cloud based applications which demand QoS-enabled Internet connectivity for information gathering, exchange and processing. Flexibility and scalability are important requirements of Industry 4.0, since the physical environment of the factories is in constant change. Implementing these requirements demands dealing with the disposition of the sensors and actuator devices in the factories, and how easily they can be displaced, introduced, and reorganized (Freitas et al., 2013). This flexible environment can be attained by diminishing the needs for cabling to connect the devices, which is possible using wireless technologies. Implementing a QoS-aware cloud based solution is challenging in the context of wireless connections and demands three main issues to be tackled (Wollschlaeger et al., 2017): (I) the coexistence of different wireless protocols and systems, (II) interoperability between communication systems, and (III) seamless engineering to allow adaptive factory operation. In order to deal with these issues, in this article, a recently proposed seamless resources sharing architecture (Kunst et al., 2016a,b; Fernandez et al., 2017) is adapted to the IoT scenario aiming at improving the device to cloud communications considering the coexistence of different wireless networks technologies, particularly in the domain of Industry 4/0.