Priority-MAC: A priority based medium access control solution with QoS for WSN

WSNs are composed of sensors that collect, process, and send data to a sink. To communicate, sensors use a shared medium. Thus, a robust MAC layer protocol has to be implemented for transmission management. This paper presents a QoS based WSNs MAC protocol that ensures service differentiation and less energy consumption. It is based on a duty-cycle approach that combines TDMA and CSMA/CA schemes. The proposed Priority-MAC protocol introduces also an EDF queue scheduling policy that aims to give priority to the urgent traffic taking into consideration the packet deadline. Simulations were conducted to evaluate the performances of our solution. Results have shown better performances in terms of energy consumption.