Identification and recovery of repaired nodes based on distributed hash table in WSN

Wireless sensor networks are used to monitor physical and environmental conditions in various areas in order to reduce the manpower. The deployment of sensor nodes becomes increased in WSN since it provides the high quality of service (QoS). But such network can be affected by failures such as hardware, battery failure or some environmental factors. This affects the QoS and leads to failure or malfunctioning of sensor nodes and so increases the usage of sensor node. To avoid such problems, identifying the repaired nodes and recovering the malfunctioning node is essential. This goal is achieved by framing WSN with distributed hash table (DHT) which provides an efficient recovery method known as Checkpoint recovery and the topology is constructed using this table in a decentralised approach. The randomly directed exploration (RDE) of this approach uses the Adhoc on Demand distance Vector (AODV) routing protocol to find the repaired node directly. The proposed method finds the repaired node directly and recovers malfunctioning node, consumption of time and energy is reduced thereby increases the performance level.