Wireless sensor networks (WSNs) have great practical importance forsurveillance systems to perform monitoring by acquiring and sending informationon any intrusion in a secured area. Requirement of very little humanintervention is one of the most desirable features of WSNs, thus making it acheaper and safer alternative for securing large areas such as internationalborders. Jamming attacks in WSNs can be applied to disrupt communications amongthe sensor nodes in the network. Since it is difficult to prevent jammingattacks, detection and mapping out the jammed regions is critical to overcomethis problem. In a security monitoring scenario, the network operators will beable to take proper measures against jamming once the jammed regions in thenetwork are known to them. It is also desirable to keep the interactions of thesensor nodes in the network minimal, as they are low powered devices and needto conserve their resources. In this paper we propose a light-weight techniquefor faster mapping of the jammed regions. We minimize the load on the sensorsby removing the actual responsibility of mapping from the network to thecentral base station (BS). After a few nodes report to the BS, it carries outthe task of mapping of the jammed regions in the network. We use our simulationresults to compare our proposed system with the existing techniques and also tomeasure the performance of our system. Our results show that the jammed regionsin a network can be mapped from fewer nodes reporting to the base station.
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