In most Wireless Sensor Networks applications
users would expect to achieve good service in terms of reliable
retrieved accurate data. One technique to improve the level of
data accuracy is to use fault tolerance techniques such as
redundancy that would cause the energy of the system to deplete
quickly. In this paper we address the problem of reliable wireless
sensor network and provide the design and the analysis of an
algorithm that model cluster-based structured Wireless Sensor
Networks with the objective of achieving suitable reliability level
requirements to extend the whole system lifetime. Reliability is
defined as the probability that a sensor node will perform its
intended function during a specified period of time under stated
conditions. We analyze the effect of redundancy on the system
reliability and the energy consumption level of the Wireless
Sensor Networks model. Throughout the analysis we derived an
expression for both the reliability and the energy consumption in
terms of redundancy level parameter. Parameterizing the
reliability and energy consumption would give the system
designer the ability to select the suitable value of the redundancy
level in order to satisfy different performance criteria such as
maximizing the system reliability and achieving minimum energy
consumption at the same time. |
