Reliability and Lifetime Modeling of Wireless Sensors Network

Abstract

In this thesis, we mathematically model the lifetime of a wireless sensor network (WSN) that uses the prominent MELETE protocol for data dissemination. We first model the lifetime of an individual sensor node which is subsequently used to quantify the network’s connectivity and lifetime. Using the lifetime model, we study the impact of different parameters on the network lifetime, e.g., search space around a requesting node, number of responders, transmission range, etc. In addition to providing a low-complexity analytical method for evaluating network reliability, the proposed model reveals interesting insights into the parameters governing the lifetime of a practical WSN. we compare the results inferred through the proposed lifetime model with simulation results to study the affect of the simplifying assumptions on the network lifetime model.We used Tinyos-2.1.0 TOSSIM for simulation. The comparison reveals that our mathematical model provides the upper bound for transmissions and lower bound for network lifetime. We have tightened the bounds well and given suggestions to make them further tightened.