Emergency Support Based Hybrid MAC Protocol for Wireless Sensor Networks

The wireless sensor network (WSN) has been gaining attraction in all fields. The range of sensors integrated into related applications is exploding. In fact, the future is moving towards the Internet of Things (IoT) and it is predicable to need deploying billions of sensors for monitoring. Such considerable amount of connected devices must offer efficient services for diverse applications. This vision directly depends on the efficiency of WSN protocols. In this way, our idea is to enhance the medium access scheme exploiting typical Medium Access Control (MAC) protocols. We propose a flexible hybrid MAC protocol that combines contention and scheduling aspects. It is designed to overcome traffic changes constraints, especially emergency cases. To achieve our goals, we join Career Sense Multiple Access / Collision Avoidance (CSMA/CA) and Time Division Multiple Access (TDMA) behaviors, and we adapt the channel access strategy according to traffic priorities. Such access scheme permits to guarantee transmitting urgent data efficiently.