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Secure and Reliable Ad-Hoc on Demand Multipath Distance Vector Routing Protocol for Mobile Ad Hoc Networks

In a MANET, Node misbehavior is any such behavior that proves harmful to co-operative environment of MANET. Many schemes have been recently proposed for the detection and avoidance of misbehavior nodes, but still there are many issues like false detection due to network layer factors, packet dropping and packet delaying misbehavior which are yet to be addressed completely. The aim of the proposed approach is to mitigate the above mentioned problems of network layer misbehavior shown by mobile nodes in MANET. Based on AOMDV protocol, the proposed approach achieves this by finding reliable and secure paths for data packets before transmitting them. Since paths are verified for security and reliability at the beginning of data transmission, hence probability of packet loss/delay misbehavior is minimum. If any node in any path shows misbehavior, then that path is avoided and behavior check mechanism is triggered over that path so as to detect and check misbehaving nodes for misbehavior reasons. If misbehavior is due congestion, collision, transmitted power level or buffer overflow then the node is temporarily avoided but not blacklisted as 'misbehaving node' and thus avoiding false detection. In the proposed approach, two types of control packets viz. TPI and PFI control packets are used to detect and avoid misbehaving nodes. Also it eliminates reputation based system and promiscuous overhearing. Hence, the network throughput can be optimized in terms of security, reliability, processor and energy consumption as well as end to end delay.