Dynamic node recovery for improved throughput in MANET

Fault-tolerance is one of the major issues in ad hoc networks. Failure probability is greater because of limited energy level of mobile nodes and dynamic topology constraints. Whenever a node is dubious to be attacked, checkpointing of data is done on some reliable and trustworthy node. So, evaluation of trust factor of a node is an important aspect that largely influences the recovery process. This paper compares the proposed dynamic node recovery technique with an existing base approach. The proposed research work ensures successful retrieval of checkpoints in case of node failures, thereby reducing the recovery time considerably. As an outcome, this improves throughput of the system. Trust factor of a cluster, in the proposed work, has significant impact on the count variable maintained by each node. The two are inversely proportional to each other. Count variable is kept track of so as to carry out the checkpointing task. When the count exceeds pre-specified threshold value, checkpointing is done. In addition, genetic algorithms are used to find an optimal path between the recovery node and checkpointing node as reliable transmission of data is of important concern. Performance analysis clearly depicts how proposed approach outperforms the existing base approach.