Enhancing QoS of Wireless Sensor Network by detection of faulty sensor node

In nigh application, it is indispensable to discover or supervise the behavior of the surrounding situation at a fine resolution over large spatial-temporal scales therefore WSN (Wireless Sensor Network) is well-advised. Because of smaller size and low power requirement of sensor device use of WSN for watching the surrounding action is increased time to time. Numeral of sensor inside WSN is proportionate to the WSN accuracy. As WSN may be operated in unsupervised and aggressive environment because of this probability of failure of sensor node inside WSN is increased. If any of the sensor node is failed, this will lead to the change the WSN topology, also create network separation, increases the distance between a node pair and reduce secondary available shortest routes. Due to this quality of service (QoS) of WSN will be degraded, to improve QoS of WSN, we have to find out faults within the network. This paper represents the easiest way for finding the defective sensing element inside the network. This method measure Round Trip Time (RTT) and throughput of the Round Trip Path (RTP) and compare the calculated RTT and throughput with threshold values (threshold value for RTT (Th (rtt)) and throughput (Th (throughput))) based on a comparison result we will find a faulty sensor within the network.