Distributed synchronization for charging sensors based on service priority in WSAN

Wireless sensor and actuator networks are based on the collaboration of sensor and actuator nodes, relying on low power consumption, low cost, and wireless communication. One of the significant limitations of sensor and actuator networks is low power supply. In this paper, an algorithm based on the cooperation of actuators and sensors extends the life of nodes. Since the actuators are more energy-efficient and capable of moving and charging immobile sensor nodes, prevent a network from splitting, and can extend network life by identifying and charging the sensor nodes whose energy is running out. Our goal is to identify and charge the low-energy sensors by the actuators. In the proposed method, based on the priority of each sensor and considering the amount of remaining charge, the actuator moves to the desired sensor. A distributed algorithm is presented in this paper that its aim is to identifies the desired sensor nodes and with the coordination between the actuators, serves the sensor nodes and extends their life.