Opportunistic Wireless Control Over State-Dependent Fading Channels

TL;DR

This paper develops a controller design method for mobile agents in wireless control systems affected by shadow fading, ensuring system performance despite channel variability and coupling effects.

Contribution

It introduces a novel approach using constrained finite field networks and algebraic state space representation to guarantee performance in coupled wireless control and mobile agent systems.

Findings

The proposed method effectively ensures system stability under shadow fading conditions.

Graphical and search techniques simplify controller design for mobile agents.

The illustrative example confirms the method's practical effectiveness.

Abstract

The heterogeneous system consisting of the wireless control system (WCS) and mobile agent system (MAS) is ubiquitous in Industrial Internet of Things (IIoT) systems. Within this system, the positions of mobile agents may lead to shadow fading on the wireless channel that the WCS is controlled over and can significantly compromise the WCS's performance. This paper focuses on the controller design for the MAS to ensure the performance of WCS in the presence of WCS and MAS coupling. Firstly, the constrained finite field network (FFN) with profile-dependent switching topology is adopted to proceed the operational control for the MAS. By virtue of the algebraic state space representation (ASSR) method, an equivalent form is obtained for the WCS and MAS coupling. A necessary and sufficient condition in terms of constrained set stabilization is then established to ensure the Lyapunov-like performance with expected decay rate. Finally, a graphical method together with the breath-first searching is provided to design state feedback controllers for the MAS. With this method, it is easy to check the constrained set stabilization of MAS and to ensure the performance requirements of WCS in the presence of WCS and MAS coupling. The study of an illustrative example shows the effectiveness of the proposed method.