TRIDNT: Isolating dropper nodes with some degree of selfishness in MANET

Abstract

In Mobile ad-hoc network, nodes must cooperate to achieve the routing purposes. Therefore, some network nodes may decide against cooperating with others; selfish nodes; to save their resources. Also these networks are extremely under threat to insider; malicious nodes; especially through packet dropping attacks. In this paper, we design a novel monitoring and searching scheme to detect and isolate the dropper nodes in ad-hoc networks, called TRIDNT (Two nodedisjoint Routes scheme for Isolating Dropper Node in MANET). TRIDNT allows some degree of selfishness to give an incentive to the selfish nodes to declare itself to its neighbors, which reduce the misbehaving nodes searching time. In TRIDNT two node-disjoint routes between the source and destination are selected based on their trust values. We use both DLL-ACK and end-to-end TCP-ACK to monitor the behavior of routing path nodes: if a malicious behavior is detected then the path searching tool starts to identify the malicious nodes and isolate them. Finally our scheme reduces the searching time of malicious nodes, and avoids the isolated misbehaving node from sharing in all future routes, which improve the overall network throughput. © Springer-Verlag Berlin Heidelberg 2011.