Hierarchical Event-Triggered Online Transmission Scheduling for Wireless Control Systems

Event-triggered state estimation scheduling has been fully studied, where the local sensor transmits to a remote estimator when some triggering conditions are satisfied. Different from the existing literature, we take the sensors' sleep state into consideration in the traditional framework with the sleep schedule, consisting of three transmission power levels: the higher-power level, the lower-power level and zero. Thus, a new scheduling scheme is required adapt to this characteristic. A double-phase based event-triggered scheduling algorithm is presented to coordinate these three levels under power constraints. The optimal offline scheduling scheme is proposed with the rigorous proof of optimality. Comparison study is conducted to show the advantage of the online scheduling scheme.

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