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2010 3rd International Conference on Future BioMedical Information Engineering (FBIE 2010)

作者： JIANG Yong-zeng 1 Yao Zhong-min 2 Department of computer 1 communication and Electronic Engineering Institute 2 Qiqihar University Qiqihar Heilongjiang china SONG Guang-jun 3 Dong Jing 4 Department of computer 3 Department of Modern education technology 4 Qiqihar University Qiqihar Heilongjiang china

The application of wireless sensor network technology in the field of medical and health,especially in remote monitoring applications,has an important practical significance to our country entered old age.A design of wireless remote health monitoring system based on nRF24E1 was studied,completed the wireless sensor network node’s circuit of hardware,operating principle and design method of *** a simple application of the design,the resources of the hardware is saved,the complexity of the software is *** the hardware of the system is simple,low power consumption and practical.

关键词： nRF24E1 wireless sensor network network node remote health monitoring system low power consumption

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A DISTRIBUTED METHOD FOR RELAY SELECTION IN COOPERATIVE COGNITIVE RADIO networkS

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Journal of Electronics(china) 2010年第5期27卷 715-722页

作者： Zhao Junhui Chen Ximei School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Faculty of Science and technology Macao UniversityMacaoChina National Mobile communications Research laboratory Southeast UniversityNanjing 210096China

We analyze the performance of a fully decentralized relay-selection method for the re-lay-assisted Cognitive Radio(CR) *** method requires no explicit communication among relay,assumes no prior knowledge of *** particular,we assume that the frequencies chosen by the relay-assisted CR network overlapped with an active primary *** proposed relay-selection scheme decreases the outage probability by considering both the channel scenario and the interference to the primary link compared with the non-cooperative *** of cooperative diversity are increased with the increased number of relays.

关键词： Relay-selection Cognitive Radio (CR) Outage probability

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Propagation Characteristics of 2.4GHz wireless Channel in Cornfields

Propagation Characteristics of 2.4GHz Wireless Channel in Co...

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2011 IEEE 13th International Conference on communication technology(ICCT 2011)

作者： Siyu Li Hongju Gao key laboratory of Modern Precision Agriculture System Integration Research ministry of education College of Information and Electrical Engineering china Agricultural University Beijing 100083

Researches on propagation characteristics of wireless channel in cropland environments will lay the foundation for network deployments of wireless sensor network （WSN） for agricultural information *** this study,cropland with corn in maturity stage was selected as the representative of worst-case scenarios for radio propagation within cropland,and the propagation mechanisms and the impact factors on the propagation characteristics of wireless channel in this environment were *** addition,the power strength Radio Signal Strength Indicator （RSSI） and Packet Loss Rate （PLR） were measured in cornfields,and the node’s coverage was further *** experimental results were analyzed to provide the guidance and suggestion for the WSN *** the engineering practice,the nodes shall be placed in open area such as wide walkways when it is possible in order to minimize propagation loss and increase the node’s coverage *** the antenna height of 1.4m to 1.6m is a good option,which will be more economic and ***,experimental results also verified that rainfall doesn’t have much effect on the propagation of 2.4GHz wireless *** although raising the transmitted power can increase the transmission range significantly,both the power usage of battery and the radio surveillance regulations have to be taken into account.

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Robust cooperative spectrum sensing schemes for fading channels in cognitive radio networks

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Science china(Information Sciences) 2011年第2期54卷 348-359页

作者： YUE WenJing1,2, ZHENG BaoYu1,2, MENG QingMin1, CUI JingWu1 & XIE PeiZhong1 1Institute of Signal Processing and Transmission, nanjing University of Posts and Telecommunications, nanjing 210003, china 2Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, china 1. Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing 210003 China2. Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200240 China

In cognitive radio systems, cooperative spectrum sensing can detect the presence of the primary user accurately. In practice, however, since the sensing observations are forwarded to a data collector through fading channels, the sensing performance is severely degraded. To deal with this problem, in this paper, we first propose a secondary user selection based cooperative spectrum sensing method to improve sensing performance by decreasing the reporting errors introduced by the fading channels. More specifically, only the secondary users with better signal-to-noise ratio (SNR) for reporting channels are allowed to send their local binary decisions (0 or 1) to the data collector while the others will send nothing. Additionally, we further propose a diversity based cooperative spectrum sensing method which applies existing space-time coding. By exploiting space diversity in CR network, the reporting errors introduced by the fading channel can be decreased and then the sensing performance is improved significantly. For either proposed cooperative spectrum sensing method, the sensing performance is derived and the analytical performance results are given. Our analysis and numerical results verify that proposed methods outperform the conventional cooperative spectrum sensing with OR-rule by taking into account the error effect on the reporting channels.

关键词： cognitive radio (CR) spectrum sensing energy detection diversity technique space-time coding

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Design and Implement of wireless Measure and Control System for Greenhouse

Design and Implement of Wireless Measure and Control System ...

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第三十届中国控制会议

作者： DU Xiaodong,WANG Jun~*,JI Ping,GAN Kaifeng key lab of Machine Vision and Intelligence Control technology,Hefei University,Hefei 230601,P.R.china

With the rapid development of computer technology,MEMS technology,network technology,and so on,sensors are becoming miniaturization,intelligence,and integration,and has bring out a new network--wireless sensor networks(WSN).Based on the existent CAN-bus measure and control system which can achieve automatic measure and control of the greenhouse environment and nutrient solution in our lab,this paper studies wireless sensor networks,mainly including multifunctional wireless sensor nodes,wireless control nodes,main node,and system integration demonstration. We design and study the wireless sensor networks node’s hardware platform deeply,consider low-power characteristics in node hardware and software design,analyze the consumption of the node generally and give out the corresponding energy-saving strategies supplied with solar power and battery,and compose star *** results of the experiment in the greenhouse environment show that the wireless sensor network will bring a lot of convenience for the greenhouse environment monitoring and control.

关键词： MSP430 IP-LINK1200 Solar power Zigbee protocol Greenhouse

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An Distributed Parallel Aggregation Scheduling in Multihop sensorNet

An Distributed Parallel Aggregation Scheduling in Multihop S...

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2010 4th International Conference on Intelligent Information technology Application (IITA2010)

作者： Liqun Shan1 2Jinkuan Wang1 3 1School of Information Science & Engineering Northeastern University Shenyang china Zhigang Liu1 3Ruiyan Du1 3 2 Northeastern Petroleum University Daqing china 3Engineering Optimization & Smart Antenna Institute Northeastern University at Qinhuangdao Qin huang dao china

Data aggregation is a primitive operation in wireless sensor network applications. This paper focuses on data aggregation scheduling problem to minimize the latency. An efficient distributed method is proposed to structure a collision-free schedule for parallel data aggregation in WSNs. We prove that the latency of the aggregation schedule generated by our algorithm is at most 4Δ+15R-16 time-slots where R is the network radius and Δ is the maximum node degree in the communication graph of the original network.

关键词： wireless sensor networks connected dominating set parallel aggregation scheduling latency

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wireless sensor networks Research in Medical Assistant Application

Wireless Sensor Networks Research in Medical Assistant Appli...

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2009 IEEE International Symposium on IT in Medicine & education(ITME2009)

作者： WANG Xin-sheng ZHAN Yong-zhao XIONG Shu-ming WANG Liang-min School of Computer Science and communication Engineering Jiangsu University Zhenjiang 212013 china

In view of the existing situation that patients’ physiological information is not timely and securely acquired and medical workers is easy infected in some particular large scale medical assistance application,a feasible solution based on wireless sensor networks is *** the solution,a secure network topology based on hexagonal mesh is constructed according to node locations for acquiring patients’ information and an secure and energy-efficient routing algorithm is designed according to characters of hops for transmission of patients’ *** security is realized by one-way hash key chain and symmetric key *** shows that the solution has better performance on saving energy,traffic load and security.

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A Clonal Chaos Adjustment Algorithm for Multi-modal Function Optimization

A Clonal Chaos Adjustment Algorithm for Multi-modal Function...

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第二十七届中国控制会议

作者： Hong Lu1,Mu Zhichun 2 1.Department of Electronic Engineering,Huaihai Institute of technology,Lianyungang 222005,P.R.china 2.School of Information Engineering,University of Science and technology Beijing,Beijing 10083,P.R.china

By integrating chaos mechanism and niche technique,a novel immune algorithm--the Clonal Chaos Adjustment Algorithm（CCAA） is proposed based on the clonal selection principle and idiotypic immune network theory exhibited in bio-logical immune *** advantages of the ergodic and stochastic properties of chaotic variable,an adaptive chaos mu-tation operator is designed by the combination of prior knowledge of antibody and evolution *** operator can avoid blind search effectively and enhance the convergence *** using stochastic processes martingale theory,the martingale characteristic of the average fitness of the population is analyzed and the almost sure strong convergence of CCAA is deduced. Furthermore,it is proved that the algorithm is globally convergent with probability 1 in a finite number of steps when the state space is *** simulation results of multi-modal function optimization show that CCAA can inhibit prematurity and has preferable global convergence performance.

关键词： Clonal selection principle Chaos Martingale Almost sure strong convergence

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An Energy Minimization Algorithm based on Synergy Choice for Resourceconstrained wireless Senor network

An Energy Minimization Algorithm based on Synergy Choice for...

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2009 ISECS International Colloquium on Computing, communication, Control, and Management

作者： Long Cheng-zhi 1,2,Chen Hui3,Li Li-hong 4,Wu Wei-ling 2,Xiang Man-tian5 1 School of Information Engineering,Nanchang University,Nanchang,330031 china 2 School of Information Engineering,Beijing University of Posts and Telecommunications,Beijing,100876 china 3 School of Foreign Studies,Nanchang University,Nanchang,330031 china 4 Software College,Nanchang University,Nanchang,330031 china 5 School of Electronicsand Information,Northwestern PolytechnicalUniversity,Xian,710072 china

Cooperative diversity can be applied to energyconstrained resource-constrained wireless sensor network s to significantly reduce node energy ***,cooperation synergy must be carefully selected and coordinated to practically exploit this energy saving *** this paper we investigate synergy choice for energy minimization algorithm in a resource-constrained wireless sensor *** formulate novel and computationally efficient synergy choice heuristics for sensor nodes based on either global or local knowledge of average path loss values in the *** present extensive simulation results of cooperation in a resource-constrained wireless sensor network to show that the proposed heuristics achieve near-optimally energy efficient synergy ***,our simple synergy choice heuristics form the basis of an effective distributed cooperation protocol for improving the energy efficiency of a resource-constrained wireless sensor *** importantly from the point of view of practical implementation,we show that our synergy choice heuristic based on local information is the most effective cooperation strategy for resource-constrained resource-constrained wireless sensor networks,as it yields superior energy conservation results while enabling fully distributed and scalable cooperation.

关键词： cooperative diversity synergy choice energy efficiency resource-constrained wireless sensor networks

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Application of wireless sensor network in Dam Safety Monitoring System Design

Application of Wireless Sensor Network in Dam Safety Monitor...

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International Conference on Broadcast technology and Multimedia communication(BTMC 2010)

作者： Yuhong Li and Xinhuan Cheng Digital Engineering and Simulation Centre College of Hydropower and Information Engineering Huazhong University of Science and technology Wuhan 430074 P.R.china

As the potential for loss of life in the event of a dam failure is very dependent on the warning time available to evacuate the population at risk downstream of the dam,it has important implications for the monitoring of dam *** efforts have been carried out over the decades to produce methods for monitoring and determination of the extent and timing of the dam *** this paper,a novelty design of a WSN-based dam safety monitoring system is *** for energy saving of WSN-based dam safety monitoring are given:reasonable nodes of instruments settlement,and feasible routing strategy.

关键词： WSN Dam Safety Monitoring Routing Strategy System Design.

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