期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2013
卷号：57
期号：3
出版社：Journal of Theoretical and Applied
摘要：Mobile Ad hoc Networks (MANETs) is a collection of mobile nodes forming the network dynamically for exchange of information using the multi-hop wireless communications. It is difficult to find the optimal route between source and destination due to the changing topology and dynamic nature of the mobile nodes. Routing protocols for mobile ad hoc networks are designed with an assumption that the nodes will cooperate in packet forwarding to establish communication between distant nodes using multi-hop communication. The cooperation between nodes does not exist always. In order to save scarce resources like battery power, bandwidth etc., the nodes may misbehave. A particular misbehavior, called malicious behavior, severely affects the performance of the ad hoc routing protocols. The malicious attack is carried out as a two phase attack launched by one or more malicious nodes. In the first phase, the malicious nodes try to lure legitimate node to send packets via them by participating in the network. In the second phase, these nodes drop all the data packets send via them thereby affecting the overall communication. In this paper, we have simulated the malicious behavior in Ad hoc On-demand Distance Vector (AODV) routing protocol using NS-2 and studied the impact of it on the performance of the mobile ad hoc networks with and without malicious behavior. The analysis was carried out using various metrics like packet delivery ratio, normalized routing load, average end-to-end delay and percentage of packet loss. Based on the analysis, we conclude that the steps have to be taken to thwart the malicious behavior otherwise it would be difficult to find routes longer than one or two hops.
关键词：Mobile Ad Hoc Networks; Malicious nodes; AODV; Malicious Behavior; NS-2
