Comparison of Two Intrusion Detection Schemes for Sparsely Connected Ad Hoc Networks
Several approaches have been proposed for intrusion detection in mobile ad hoc networks. Most of the approaches assume that there are sufficient neighbors to help monitor the transmissions and receptions of data packets by other nodes to detect abnormality. However, in a sparsely connected ad hoc network, nodes usually have very small number of neighbors. Using a traditional intrusion detection and mitigation scheme designed for well-connected ad hoc networks, the delivery ratio in a sparsely connected ad hoc network (50 nodes over 2000x2000 m2) can only improve from 76.5% to 79.9% with selective dropping attacks. Thus, the authors propose a Ferry Based Intrusion Detection and Mitigation (FBIDM) scheme for sparsely connected ad hoc networks.