TO ENHANCE THE SECURITY AND IMPROVE THE PERFORMANCE OF AODV PROTOCOL IN MANET USING DELAY PER HOP TECHNIQUE

The mobile adhoc network is the decentralized type of network in which mobile nodes can join or leave the network when they want. The ad hoc network is a decentralized type of wireless network. There is no pre-existing infrastructure such as routers in wired networks or access points in wireless networks on which it is depended. The ad-hoc networks are a new standard of wireless communication for mobile hosts.. No fixed infrastructure in ad hoc network like base stations is required. Nodes within each other radio range communicate directly via wireless links while these which are far apart rely on other nodes to relay messages.. As MANETs are illustrate by limited bandwidth and node mobility, there is demand to take into account the energy efficiency of the nodes, topology changes and unreliable communication in the design. There are many types of protocol are available in MANET. Its efficiency of a routing protocol is determined by its battery power consumption of a participating node and routing of traffic into the network. The security attacks are broadly into active and passive attacks. The wormhole attack is the active type of attack which increase delay in the network. In this research work, technique of delay per hop will be proposed which detect malicious nodes from the network. The proposed algorithm is implemented in Ns2 and results are analyzed in terms of certain parameter. The proposed algorithm performs well in terms of throughput, delay and packet loss.