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In cognitive radio networks (CRNs), spectrum sensing data falsification (SSDF) is one of the most typical attack which hugely degrades the detection performance of cooperative spectrum sensing (CSS). SSDF and defense strategies have been an active field of research, but countermeasures of existing researches are sensitive to the number of malicious users (MUs). In this paper, we propose a two-stage...
Most of the existing trust evaluation methodsof wireless sensor networks focus on communication behaviorsin building paths without considering transmission behaviors in sensing environment. Therefore, a potential threat tothe network security exists in wireless sensor networks. Wepropose a dynamic trust evaluation methodbased on multi-factor including direct trust factor and indirect trustfactor in...
In the wireless sensor network (WSN), the operation reliability is usually evaluated by processing measured datas at network nodes. As the traditional algorithms exist the problems of the complex calculation and large energy consumption, a method for fault diagnosis of nodes in WSN based on rough set theory (RS) and support vector machine (SVM) is proposed in this paper. In this paper, we collect...
A wireless sensor network (WSN) may interfere with the coexistent network when it plays a part in environmental monitoring, clinical care and so on. For the sake of interference mitigation, a cooperative analog network coding (CANC) technique is studied in the heterogeneous WSN. Furthermore, an optimal algorithm named S-CANC is proposed by combining the source node selection and CANC to minimize the...
Recently, Wireless Sensor Networks (WSNs) which consist of thousands of sensor nodes have become one of the most popular topics. Different from the common Ad-hoc networks, energy efficient routing protocol is the most important issue in WSNs. LEPS (Link Estimation and Parent Selection) is the routing protocol used in the TinyOS, which is widely used in many kinds of WSNs platforms. But in LEPS protocol,...
Wireless Sensor Networks (WSNs) which consist of thousands of sensor nodes has become one of the most popular topics. As the deployment of outdoor wireless sensor networks continues to accelerate, it has been clear that a proper deployment may achieve both the sound networks performance and the low cost. A basic criterion for selecting nodes location is the path loss which has essential impact on...
In most sensor network applications, the information gathered by sensors will be meaningless without the location of the sensor nodes. Node localization has been a topic of active research in recent years. Accurate self-localization capability is highly desirable in wireless sensor network. A fundamental problem in distance-based sensor network localization is whether a given sensor network is uniquely...
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