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Wireless Networked Control Systems With Coding-Free Data Transmission for Industrial IoT
IEEE Internet of Things Journal ( IF 9.515 ) Pub Date : 2019-12-04 , DOI: 10.1109/jiot.2019.2957433
Wanchun Liu; Petar Popovski; Yonghui Li; Branka Vucetic

Wireless networked control systems for the Industrial Internet of Things (IIoT) require low-latency communication techniques that are very reliable and resilient. In this article, we investigate a coding-free control method to achieve ultralow latency communications in single-controller-multiplant networked control systems for both slow- and fast-fading channels. We formulate a power allocation problem to optimize the sum cost functions of multiple plants, subject to the plant stabilization condition and the controller’s power limit. Although the optimization problem is a nonconvex one, we derive a closed-form solution, which indicates that the optimal power allocation policy for stabilizing the plants with different channel conditions is reminiscent of the channel-inversion policy. We numerically compare the performance of the proposed coding-free control method and the conventional coding-based control methods in terms of the control performance (i.e., the cost function) of a plant, which shows that the coding-free method is superior in a practical range of signal-to-noise ratios.
更新日期:2020-03-16

 

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