Mobile jammer localization and tracking in multi-hop wireless network

The shared nature and open access to the wireless medium make the wireless network vulnerable to different kinds of security threats. Jamming attack may pose a significant threat to the wireless network by occupying the communication channel used by legal nodes. To tackle this security threat, a few anti-jamming schemes have been put forward, such as channel hopping, spatial retreat, etc. Among these strategies, jammer localization has attracted much attention in recent years since it is very helpful for jamming-avoidance routing or even jammer elimination. However, existing algorithms mainly focus on the localization of the stationary jammer, which fail to cope with the scenario where mobile one exists. Besides, the cooperative assumption in sensor localization and object tracking problems in cooperative network configurations will not hold for the jammer localization scenario since jamming attacks can seriously affect normal network transmission. In order to bridge this gap, a Mobile Jammer Localization and Tracking Scheme (MJLTS) is put forward, which contains four steps, i.e., Initial monitoring nodes selection, Cooperative nodes determination, Trilateration localization and Monitoring group handover. In order to evaluate the effectiveness of the proposed scheme, a series of simulation experiments have been conducted. Experimental results show that MJLTS can locate and track mobile jammer effectively and accurately.