A survey on fault node identification

In recent years, Wireless Sensor Networks (WSNs) are widely used in different applications for information gathering and monitoring purpose. Large numbers of sensor nodes are deployed in the environment to increase the quality of service (QoS). A critical issue found in Wireless Sensor Network is node failure. Failure of nodes occurs due to various reasons like hardware failure, energy depletion, harsh environment, malicious attack, etc. To increase the Quality of service, it is important to identify the failure node and take necessary actions to avoid further ruin of the service. The current research work is based on learning different techniques used to identify and recover the failure node which spontaneously improves the Quality of Service.