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Sensors 2018, 18(12), 4284; https://doi.org/10.3390/s18124284

Transmission Scheduling Schemes of Industrial Wireless Sensors for Heterogeneous Multiple Control Systems

1
Department of Radio and Information Communications Engineering, Chungnam National University, Daejeon 34134, Korea
2
Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
*
Author to whom correspondence should be addressed.
Received: 14 November 2018 / Revised: 30 November 2018 / Accepted: 1 December 2018 / Published: 5 December 2018
(This article belongs to the Special Issue Real-Time Sensor Networks and Systems for the Industrial IoT)
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Abstract

The transmission scheduling scheme of wireless networks for industrial control systems is a crucial design component since it directly affects the stability of networked control systems. In this paper, we propose a novel transmission scheduling framework to guarantee the stability of heterogeneous multiple control systems over unreliable wireless channels. Based on the explicit control stability conditions, a constrained optimization problem is proposed to maximize the minimum slack of the stability constraint for the heterogeneous control systems. We propose three transmission scheduling schemes, namely centralized stationary random access, distributed random access, and Lyapunov-based scheduling scheme, to solve the constrained optimization problem with a low computation cost. The three proposed transmission scheduling schemes were evaluated on heterogeneous multiple control systems with different link conditions. One interesting finding is that the proposed centralized Lyapunov-based approach provides almost ideal performance in the context of control stability. Furthermore, the distributed random access is still useful for the small number of links since it also reduces the operational overhead without significantly sacrificing the control performance. View Full-Text
Keywords: transmission scheduling scheme; industrial internet of things; wireless networks; industrial control systems; wireless networked control systems transmission scheduling scheme; industrial internet of things; wireless networks; industrial control systems; wireless networked control systems
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Park, B.; Nah, J.; Choi, J.-Y.; Yoon, I.-J.; Park, P. Transmission Scheduling Schemes of Industrial Wireless Sensors for Heterogeneous Multiple Control Systems. Sensors 2018, 18, 4284.

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