Service Differentiation based Medium Access Control protocol for Real-time Application

Today Wireless Sensor Networks are increasingly used for real-time applications, which leads to take up scientist focus as a promising technology in the field of embedded systems. The toughest challenge of these networks is the energy conservation. So, most of MAC protocols designed for WSNs, aim to reduce energy consumption, which affects negatively the latency, especially if these networks are deployed in emergency response applications. In this paper we present a strategy that respects energy constraint and, in the same time, aims to manage the medium access according to the priority of messages. Our results prove that our algorithm enhances the quality of service (QoS) in terms of prioritized message latency, as well in other performance criteria.