Communication in vehicular ad hoc networks on highways is highly affected by nodes distributing falsified position information. This paper shows that malicious nodes are able to divert and drop regular traffic, which results in serious network performance degradation. Our simulation results show that in highway scenarios the impact is even more severe than in city scenarios. In general highway scenarios, position faking can result in an overall delivery ratio decrease up to approximately 90%, relatively independent of the number of maliciously acting nodes in case theses nodes drop intercepted packets. In the special case where all packets have to traverse an area with a single stationary attacker, delivery ratio even decreases to zero. As in city scenarios, the reasons for decreased delivery ratio depend on the forwarding behavior of malicious nodes. Whereas for scenarios without packet dropping by position faking nodes, decreased delivery ratio results from routing loops, in scenarios with packet dropping by position faking nodes, the dropping itself is of course the actual reason. In this paper, the authors analyze the potential impact of false position information in beacon messages on geographic routing. It will be assumed that false position information is distributed either by malicious nodes or by defective nodes. For the analysis, the research is focused on highway scenarios with respective vehicular movement patterns. The results show severe performance degradation even in case there is only a low percentage (10%) of maliciously acting nodes that combine position information falsification with subsequent message dropping.
Greedy routing in highway scenarios: the impact of position faking nodes
Vorrangige Wegewahl bei Autobahn-Szenarien: der Einfluss verfälschender Knotenpunkte auf die Positionsbestimmung
2006
6 Seiten, 4 Bilder, 1 Tabelle, 13 Quellen
Conference paper
English
Greedy Routing in Highway Scenarios: The Impact of Position Faking Nodes
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