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In order to solve the problem of the node flip ambiguity generated by using classical least squares method in wireless sensor networks node localization, an iterative method based on triangular node blocks (IP-TNB) to process node flip ambiguity is proposed in this paper. At first, orthogonal projection detection method is adopted to detect an unknown node needed to be positioned. If the node would...
To overcome the threats of internal malicious nodes in wireless sensor networks(WSNs), a trust-based secure routing algorithm is proposed in this paper. It uses μTESLA(micro Timed, Efficient, Streaming, Loss tolerant Authentication) algorithm to ensure that the data should not be tampered by malicious nodes. Using the improved D-S evidence theory to evaluate the trust degree of internal nodes and...
To solve the problem of congestion which often occurs in the process of the large data transmission in large-scale wireless senator networks, a multipath routing protocol based on congestion control mechanism implemented by cross-layer design concept is proposed. Realizing the multipath routing protocol on the basis of AODV protocol, congestion control mechanism with active congestion avoidance, real-time...
Nodes in low-rate wireless sensor networks (LR-WSN) are often placed in the bad environment intensively, and node energy consumption makes the network topology structure change dynamically, resulting in coverage of the case in which the actual testing process can not meet the requirements. In order to facilitate users' remote testing, this paper builds a conformance test platform of LR-WSN, proposes...
The characteristic of the IEEE802.11 protocol and the principle of the DoS attack against 802.11 WLAN is analyzed in this paper. a general system model for WLAN network intrusion detection and 802.11 DoS attack analysis based on the intelligent terminal is advanced. On the base of the research on using NDIS IMD to realize packet capturing and its developing process, a system of intrusion detection...
Node positions in a wireless sensor network are required to track the nodes in real-time, but normally no prior information is given on deployment. A locating mechanism is required for such a purpose and in this paper a method is described to determine the point-to-point distance between two sensor nodes in an asynchronous location positioning system. A time-of-flight (TOF) based two-way ranging method,...
In the design and application of wireless body area network (WBAN) system, one main requirement is to improve the performance of the system under low signal to noise ratio scenario and more emphasis is put on the improvement in data link layer and network layer rather than physical layer. In this paper, the idea of applying cognitive radio (CR) technology, one promising technology in recent wireless...
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