Modelo de Sistema de Comunicaciones para Sistemas de Control en Red Inalámbrico (WNCS)

The generation of traffic for wireless network control systems (WNCS) is a very important design parameter that directly affects the stability of the control systems and the level of congestion of the communication systems. In the present work, a modeling framework of wireless sensor and actuator networks is proposed in the WNCS, where the exchange of data from the sensor to the controller and from the controller to the actuator is communicated through a lossy network. The performance model is then used to derive the optimal traffic generation speed from sensors and controllers to minimize the maximum probability of interruption of the stability restriction of the control systems. The resulting problem is a non-linear optimization problem that allows obtaining the global optimum. An efficient approach converts the proposed optimization problem into a linear programming problem. From the respective simulation it is proposed that the optimal solution allocates higher traffic generation speed in the controller-actuator link in comparison with the sensor-controller link, since the action link is more critical to guarantee the stability of the systems control.