“…Wireless sensor network(WSN) attained a world wide attention and is one of most promising research areas because of its diverse applications and a number of advantages over conventional networks such as ease of deployment, low cost, scalability, flexibility, reliability, etc. Application areas of WSN are military, security, agriculture [2], industrial, medical [3], [4], [5], [6], [7], environmental monitoring and home and office automation etc [8]. Some other examples of WSN applications are real time monitoring of wheel condition of train [9], exploration of underwater environment [10], monitoring of concentration of volatile organic compound at risky sites [11] and fire monitoring [12] etc.…”