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LOCALIZATION ALGORITHM BASED ON MINIMUM CONDITION NUMBER FOR WIRELESS SENSOR NETWORKS

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Journal of Electronics(China) 2013年第1期30卷 25-32页

作者： Du Xiaoyu Sun Lijuan Xiao Fu wang ruchuan College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks

During range-based self-localization of Wireless Sensor Network (WSN) nodes, the number and placement methods of beacon nodes have a great influence on the accuracy of localization. This paper proves a theorem which describes the relationship between the placement of beacon nodes and whether the node can be located in 3D indoor environment. In fact, as the highest locating accuracy can be acquired when the beacon nodes form one or more equilateral triangles in 2D plane, we generalizes this conclusion to 3D space, and proposes a beacon nodes selection algorithm based on the minimum condition number to get the higher locating accuracy, which can minimize the influence of distance measurement error. Simulation results show that the algorithm is effective and feasible.

关键词： Wireless Sensor Network (WSN) 3D location Beacon node Fractional steps maximumlikelihood algorithm

PChord:a distributed hash table for P2P network

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Frontiers of Electrical and Electronic Engineering in China 2010年第1期5卷 49-58页

作者： Haiping HUANG Yan ZHENG Hongwei CHEN ruchuan wang College of Computer Nanjing University of Posts and TelecommunicationsNanjing 210003China

As a solution for data storage and information sharing for peer-to-peer(P2P)networks,a novel distributed hash table(DHT)structure called PChord is presented in this *** adopts a bi-directional searching mechanism superior to Chord and enhances the structure of the finger *** on Hilbert space filling curve,PChord realizes the mapping mechanism for multikeyword approximate *** with the Chord and Kademlia protocols,PChord evidently increases speed on resource searching and message spreading via theoretic proof and simulation results,while maintaining satisfactory load balance.

关键词： distributed hash table(DHT) peer-to-peer(P2P) bi-directional searching

Topology control based on quantum genetic algorithm in sensor networks

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Frontiers of Electrical and Electronic Engineering in China 2007年第3期2卷 326-329页

作者： SUN Lijuan GUO Jian LU Kai wang ruchuan College of Computer Nanjing University of Posts and TelecommunicationsNanjing 210003China

Nowadays,two trends appear in the application of sensor networks in which both multi-service and quality of service(QoS)are *** terms of the goal of low energy consumption and high connectivity,the control on topology is *** algorithm of topology control based on quantum genetic algorithm in sensor networks is *** advantage of the quantum genetic algorithm over the conventional genetic algorithm is demonstrated in simulation *** goals of high connectivity and low consumption of energy are reached.

关键词： sensor network topology control power control genetic algorithm quantum genetic algorithm

A NEW PRIVACY-PRESERVING EUCLID-DISTANCE PROTOCOL AND ITS APPLICATIONS IN WSNS

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Journal of Electronics(China) 2013年第2期30卷 190-197页

作者： Chen Ping Ji Yimu wang ruchuan Huang Haiping Zhang Dan College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications

Recently, privacy concerns become an increasingly critical issue. Secure multi-party computation plays an important role in privacy-preserving. Secure multi-party computational geometry is a new field of secure multi-party computation. In this paper, we devote to investigating the solutions to some secure geometric problems in a cooperative environment. The problem is collaboratively computing the Euclid-distance between two private vectors without disclosing the private input to each other. A general privacy-preserving Euclid-distance protocol is firstly presented as a building block and is proved to be secure and efficient in the comparison with the previous methods. And we proposed a new protocol for the application in Wireless Sensor Networks (WSNs), based on the novel Euclid-distance protocol and Density-Based Clustering Protocol (DBCP), so that the nodes from two sides can compute cooperatively to divide them into clusters without disclosing their location information to the opposite side.

关键词： Secure multi-party computation Privacy-preserving Euclid-distance protocol Wireless Sensor Networks (WSNs) Density-Based Clustering Protocol (DBCP)

A Multipath Routing Algorithm Based on Traffic Prediction in Wireless Mesh Networks

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Communications and Network 2009年第2期1卷 82-90页

作者： Zhiyuan LI ruchuan wang 不详

The technology of QoS routing has become a great challenge in Wireless Mesh Networks (WMNs). There exist a lot of literatures on QoS routing in WMNs, but the current algorithms have some deficiencies, such as high complexity, poor scalability and flexibility. To solve the problems above, a multipath routing algorithm based on traffic prediction (MRATP) is proposed in WMNs. MRATP consists of three modules including an algo-rithm on multipath routing built, a congestion discovery mechanism based on wavelet-neural network and a load balancing algorithm via multipath. Simulation results show that MRATP has some characteristics, such as better scalability, flexibility and robustness. Compared with the current algorithms, MRATP has higher success ratio, lower end to end delay and overhead. So MRATP can guarantee the end to end QoS of WMNs.

关键词： Wireless Mesh Networks Non-Linear Traffic Prediction Model Multipath Routing QoS

Agent-Oriented Architecture for Ubiquitous Computing in Smart Hyperspace

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Wireless Sensor Network 2010年第1期2卷 74-84页

作者： Yichao JIN ruchuan wang Haiping HUANG Lijuan SUN 不详

Agent-oriented approach is increasingly showing its magic power in a diversity of fields, specifically, ubiquitous computing and smart environment. Meanwhile, it is considered the next creative issue is to interconnect and integrate isolated smart spaces in real world together into a higher level space known as a hyperspace. In this paper, an agent-oriented architecture, which involves the techniques of mobile agents, middleware, and embedded artificial intelligence, is proposed. Detailed implementations describe our efforts on the design of terminal device, user interface, agents, and AI

关键词： Agent-Oriented Ubiquitous Computing Smart Hyperspace Middleware Embedded Artificial Intelligence

Voronoi-Based Coverage Optimization for Directional Sensor Networks

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Wireless Sensor Network 2009年第5期1卷 417-424页

作者： Jing LI ruchuan wang Haiping HUANG Lijuan SUN 不详

Sensing coverage is a fundamental problem in sensors networks. Different from traditional isotropic sensors with sensing disk, directional sensors may have a limited angle of sensing range due to special applications. In this paper, we study the coverage problem in directional sensor networks (DSNs) with the rotatable orientation for each sensor. We propose the optimal coverage in directional sensor networks (OCDSN) problem to cover maximal area while activating as few sensors as possible. Then we prove the OCDSN to be NP-complete and propose the Voronoi-based centralized approximation (VCA) algorithm and the Voronoi-based distributed approximation (VDA) algorithm of the solution to the OCDSN problem. Finally, extensive simulation is executed to demonstrate the performance of the proposed algorithms.

关键词： Directional Sensor Networks Coverage Deployment Voronoi Diagram

Distributed Image Compression Algorithm in Wireless Multimedia Sensor Networks

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ZTE Communications 2010年第1期8卷 50-54页

作者： Yang Xiaobo Sun Lijuan wang ruchuan College of Computers Nanjing University of Posts and Telecommunications Nanjing 210003 P. R. China

Because of the high bandwidth demands of multimedia data, the transmission of raw data collected at sensor nodes consumes a large amount of resources. Distributed image compression is proposed as a means of overcoming the computation and energy limitation of individual nodes by sharing the processing of tasks. In addition, it prolongs the overall lifetime of the network by assigning compression tasks to idle nodes.

关键词： Multimedia image compression multimedia data individual raw data addition sharing network energy means high

An Object Oriented Approach for Extraction Data from CAD Systems

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The Journal of China Universities of Posts and Telecommunications 1998年第2期5卷 30-36页

作者： wang ruchuan (Department of Computer Science and technology, Naming University of Posts and Telecommunications, Naming, 210003,P.R.China)

Based on object oriented method,this paper mainly discusses Process planning. In most cases, CAD systems are used for design and drafting purpose only. The described research work relates to the development of object... 详细信息

关键词： object oriented approach CG CAD CAM