In general Mobile Ad-hoc Networks (MANETs) deploy multi-hopping techniques to pass messages to nodes far beyond their communication ranges. Several protocols and routing algorithms have been proposed in this context. However, most of these proposals assume that nodes on their communication path are willing to relay messages to each other without obstructions. Therefore, these schemes are not immune against selfish or black-holes attacks. There are no clear rules of defense against this misbehavior, since routes in MANETs are not known in advance as the topology is highly dynamic. In this paper we propose, model, simulate and verify a variant of the Optimized Link State Routing (OLSR) protocol, named Reliable (R-OLSR) to detect and isolate selfish behavior during packet forwarding. The main contribution is the traffic monitoring in time on each multiple relay point (MRP). The abnormality in traffic patterns on MRPs in vicinity indicates for selfishness and trigger topology update in order to isolate such nodes. The proposed rules for defense are general enough to be applied to other proactive or hybrid routing protocols disseminating full or partial link state information throughout the MANETs.
|Number of pages||9|
|Journal||Complex Control Systems|
|Publication status||Published - 2013|