Wireless Sensor Networks (WSNs), due to their vital importance, are emerging as a
ubiquitous networking arena which pervades some of the old applications and also
enables many new ones. The credit for the rapid growth in WSN technology goes to
its self-organising and self-configuring abilities. Generally, the distributed
environment ofWSNs with little or no predetermined infrastructure, mobility, lack of
bandwidth and scalability are the issues that affect network performance. In WSNs,
lifetime is considered as the key challenging issues because all of the sensors are
battery powered. Physically, it is infeasible to recharge or replace the battery. Most of
the energy in WSN is wasted due to idle listening, collision, message overhearing,
and message overhead
