International Journal of Emerging Technology and Advanced Engineering (IJETAE)
Wireless Sensor Networks (WSNs) are comprised of large number of sensor nodes which can be used for monitoring and controlling physical phenomena in an environment such as healthcare monitoring, battlefield monitoring, enemy detection, tactical surveillance and disaster monitoring. A wireless sensor network consists of many small sensors which is capable of sensing, processing and communicating the events in wireless communication system. The vital role of the sensor networks is data delivery. The sensor nodes in a WSN have typically short battery life. However most of the WSN applications have to run for months or years.