Reliable Control through Wireless Networks

submitted paperReliability is one of the biggest challenges when using Wireless Sensor-Actuator Networks in control systems. This paper exploits the transactional guarantees offered by the LINC coordination environment to provide reliability and robustness in wireless control systems. First, LINC transactions were embedded in the mirco-controllers to deal with possible communication errors, faulty devices, and concurrent access to the devices. Then, an active replication mechanism was provided so that the system can be correctly recovered from hardware and communication failures. A case study of a ball and plate problem is detailed. The plate is lift up and down by three motors. Each motor is controlled by a micro-controller communicating in wireless with the system controller