Gray Hole Detection and Removal in MANET by Pool Tile Method

Nowadays Mobile Ad-hoc networks are widely in use. Such networks are infrastructure less which invites multiple threats to the network. As a result it decreases the performance level of network. Among these threats gray hole is the silent but more vulnerable attack which keeps attacking the network in the repetition mode. Many techniques invented to detect and remove these gray holes, where nodes in the pool themselves need to work together to find out the malicious node. If the neighbor nodes of the gray hole node itself is malicious or it is not functioning due to some other technical reasons then it is hard to detect the gray hole node in the network pool. So a pool tile method is introduced where tile represent the time t in which a pool manager of the pool performs iterations in t to keep the record of routing history and to decide gray hole node.