Performability in wireless sensors network

Abstract

This thesis tackles Performability issues in Wireless sensors networks. Performability is a mission-specific measure of system effectiveness that seeks to combine the traditional reliability and performance measures of a system. Wireless Sensor networks consist of a huge number of small sensor nodes, which communicate wirelessly. These sensor nodes can be spread out in hard accessible areas by what new applications fields can be pointed out [13]. This thesis aims to provide wireless communication architecture for Petroleum installations, such as off shore platforms and on shore processing units, which are characterized by high density of temperature and pressure sensors [24]. There are many challenges related to this work, such as time synchronization, radio resource management and routing. In this thesis we design a routing protocol for wireless sensors networks, namely Smart Routing in Wireless Sensors Networks (SR-WSN). We utilize NS2 networks simulation tool to evaluate the performability of the SR-WSN. In particular, these simulations study the impact of nodes failure on the total delay and power consumption. Finally, we build up a Markovian Reward Model (MRM) to compare the performability between SR-WSN and a typical broadcast system. The found results prove that our system outperforms broadcast system.