قابلیت اطمینان گره های حسگر در شبکه های حسگر بی سیم سیستم های فیزیکی سایبری

Sensors are a crucial component of any intelligent control system. Wireless sensor networks are one of the most rapidly developing information technologies and promise to have a variety of applications in Next Generation Networks, Internet of Things and for mission critical and safety relevant applications. Reliability is one of the most important attribute of such systems. In the paper Markov model for reliability analyses of sensor node in wireless sensor networks is proposed. It is shown that reliability of the sensor node depends on the strategy of it monitoring and is unimodal function of test period. For passive part of sensor node, the optimal time for test of functionality is defined.