共查询到19条相似文献,搜索用时 78 毫秒
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由于城市中车辆增多,车流量检测在现代交通中已成为重要的一部分。掌握车流量信息,可以了解路面状况从而对做出合理决策有极大的帮助。如何准确实时地得到车流量数据成为道路交通的显著要求,本文中用TI公司的CC2530作为核心处理器单元,通过在主要路段设置热释电红外传感器检测节点,用ZigBee无线传输技术构建无线传感器网络,来实现对车流量的准确检测。本文网络版地址:http://www.eepw.com.cn/article/276361.htm 相似文献
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目标检测是无线传感器网络中的一种重要应用,文中提出了一种能量有效分布式多传感器目标检测方法,该方法区别于以往的单目标方法,通过多个节点相互协作对目标进行检测,算法1给出了时间序列离散法,求得目标被测距离,且多节点将检测到的信息在聚合节点进行聚合,并通过算法2找到一条最优传输路径将聚合数据包传送至sink节点。此外通过仿真比较了单节点检测目标和多节点协同检测目标的概率、权系数α对检测节点平均能量消耗的影响,并给出了目标检测数据的最佳采样周期。 相似文献
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无线传感器网络分布式频谱检测研究 总被引:1,自引:1,他引:0
传统单节点频谱检测由于受到阴影效应、多径效应和隐藏终端问题的影响,使得检测性能受到影响。基于无线传感器网络的分布式频谱检测技术能有效克服这一缺陷。在简要分析频谱检测技术的特点和要求的基础上,讨论了基于无线传感器网络的分布式频谱检测系统的结构,从本地检测和融合算法两个角度,对现有的几种基于无线传感器网络的分布式频谱检测方法进行了综述,并对其发展方向给出了建议。 相似文献
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《电子技术与软件工程》2019,(24)
本文重要阐述了在进行无线传感器网络得到的异常数据时,如何针对其异常数据进行检测。也阐述了一般情况下,出现异常数据时,无线传感器网络的大致范围,并利用图模型、相邻节点之间的属性相似、当前接收到的数据与历史数据进行的对比验证,以此来推断出,异常数据出现的大致因素、并借此能准确推断出相关的地理区域出现异常信息的大概位置,又或者是设备本身可能出现故障的大概范围,为维护管理人员在网络异常判识和原因分析方面提供指导。 相似文献
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范荣真 《微电子学与计算机》2012,29(3):113-116
提出一种局部联系对比搜索算法.通过把节点刷新定位过程,与其相邻的小范围分布网络的均值特征节点做比较,利用局部无线网络节点最优信息,检测异常入侵节点信息,避免了传统集中式方法对全部节点搜索的耗时.实验证明,这种局部联系对比定位算法能够有效利用网络信息,对异常节点实现准确入侵检测,缩短了检测时间. 相似文献
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定义了新的异常因子,将数据分为正常、异常、临界3种状态,并在此基础上构建了一个基于动态阈值的异常值检测模型。在修正马尔科夫假设的基础上,给出动态阈值的更新方法。算法在无需训练集的条件下,实现了在线的实时异常值检测。仿真实验表明,算法在保持较高检测精度的同时,维持了较低的误报率。 相似文献
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集中传感器、计算机以及通信技术的无线传感器网络技术由于其良好的性能以及广阔的运用空间,得到了广大学者的关注和研究。基于此介绍了无线传感器网络的基本概念、属性,讨论了无线传感器网络的关键技术,并就使用领域进行了阐述。 相似文献
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Eduardo F. Nakamura Fabiola G. Nakamura Carlos M. S. Figueiredo Antonio A. F. Loureiro 《Telecommunication Systems》2005,30(1-3):237-254
Data dissemination is a fundamental task in wireless sensor networks. Because of the radio range limitation and energy consumption
constraint, sensor data is commonly disseminated in a multihop fashion (flat networks) through a tree topology. However, to
the best of our knowledge none of the current solutions deals with the moment when the dissemination topology needs to be
rebuilt. This work addresses such a problem introducing the use of information fusion mechanisms, where the traffic is handled
as a signal that is filtered and translated into evidences that indicate the likelihood of critical failures occurrence. These
evidences are combined by a Dempster-Shafer engine to detect the need for a topology reconstruction. Our solution, called
Topology Rebuilding Algorithm (TRA), is evaluated through a set of simulations. In the experiments, TRA showed to be efficient
in avoiding unnecessary topology reconstructions. Compared to the periodic rebuilding, in some cases, TRA could reduce the
traffic overhead in nearly 35% of the traffic produced by the periodicu rebuilding. 相似文献
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介绍了无线传感器网络的概念、几种主要的无线传感器网络协议,尤其是MAC层协议的研究情况,给出了一些比较经典的无线传感器网络MAC协议的思想。 相似文献
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A forest fire is a severe threat to forest resources and human life. In this paper, we propose a forest?fire detection system that has an artificial neural network algorithm implemented in a wireless s... 相似文献
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To reduce excessive computing and communication loads of traditional fault detection methods, a neighbor-data analysis based node fault detection method is proposed. First, historical data is analyzed to confirm the confidence level of sensor nodes. Then a nodes reading data is compared with neighbor nodes which are of good confidence level. Decision can be made whether this node is a failure or not. Simulation shows this method has good effect on fault detection accuracy and transient fault tolerance, and never transfers communication and computing overloading to sensor nodes. 相似文献
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Directional Controlled Fusion in Wireless Sensor Networks 总被引:3,自引:2,他引:1
Though data redundancy can be eliminated at aggregation point to reduce the amount of sensory data transmission, it introduces
new challenges due to multiple flows competing for the limited bandwidth in the vicinity of the aggregation point. On the
other hand, waiting for multiple flows to arrive at a centralized node for aggregation not only uses precious memory to store
these flows but also increases the delays of sensory data delivery. While traditional aggregation schemes can be characterized
as “multipath converging,” this paper proposes the notation of “multipath expanding” to solve the above problems by jointly
considering data fusion and load balancing. We propose a novel directional-controlled fusion (DCF) scheme, consisting of two
key algorithms termed as directional control and multipath fusion. By adjusting a key parameter named multipath fusion factor
in DCF, the trade-offs between multipath-converging and multipath-expanding can be easily achieved, in order to satisfy specific
QoS requirements from various applications. We present simulations that verify the effectiveness of the proposed scheme.
Min Chen received the Ph.D degree in Electrical Engineering from South China University of Technology in 2004, when he was 23 years old. Since Mar. 2006, he is Post-Doctoral Fellow in Department of Electrical and Computer Engineering at University of British Columbia. Before joining UBC, he has been a Post-Doctoral Fellow in School of Computer Science and Engineering at Seoul National University for one and half years. Dr. Chen’s research interests include algorithmic, optimization and performance issues in wireless ad hoc and sensor networks and multimedia communications over wireless networks. He was interviewed by Chinese Canadian Times where he appeared on the celebrity column in 2007. He is the author of a textbook OPNET Network Simulation (Tsinghua Univ. Press, 2004). Dr. Chen received the Best Paper Runner-up Award from The Fifth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (QShine) 2008. Victor C.M. Leung received the B.A.Sc. (Hons.) and PhD degrees, both in electrical engineering, from the University of British Columbia (UBC) in 1977 and 1981, respectively. He was the recipient of many academic awards, including the APEBC Gold Medal as the head of the 1977 graduate class in the Faculty of Applied Science, UBC, and the NSERC Postgraduate Scholarship. From 1981 to 1987, Dr. Leung was a Senior Member of Technical Staff and satellite systems specialist at MPR Teltech Ltd. In 1988, he was a Lecturer in Electronics at the Chinese University of Hong Kong. He returned to U.B.C. as a faculty member in 1989, where he is a Professor and holder of the TELUS Mobility Research Chair in Advanced Telecommunications Engineering in the Department of Electrical and Computer Engineering. His research interests are in mobile systems and wireless networks. Dr. Leung is a Fellow of IEEE and a voting member of ACM. He is an editor of the IEEE Transactions on Wireless Communications, an associate editor of the IEEE Transactions on Vehicular Technology, and an editor of the International Journal of Sensor Networks. Shiwen Mao received the Ph.D. degree in Electrical and Computer Engineering (ECE) from Polytechnic University, Brooklyn, NY in 2004. He was a Research Scientist at Virginia Tech, Blacksburg, VA from December 2003 to April 2006. Currently, he is an Assistant Professor in ECE at Auburn University, Auburn, AL. Dr. Mao’s research interests include modeling and optimization of wireless networks, cognitive networks, and multimedia communications. He is on the Editorial Board of the Hindawi Advances in Multimedia Journal and the Wiley International Journal of Communication Systems. Dr. Mao received the 2004 IEEE Communications Society Leonard G. Abraham Prize in the Field of Communications Systems and the Best Paper Runner-up Award from The Fifth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (QShine) 2008. He is the co-author of a textbook TCP/IP Essentials: A Lab-Based Approach (Cambridge Univ. Press, 2004). 相似文献
Min ChenEmail: |
Min Chen received the Ph.D degree in Electrical Engineering from South China University of Technology in 2004, when he was 23 years old. Since Mar. 2006, he is Post-Doctoral Fellow in Department of Electrical and Computer Engineering at University of British Columbia. Before joining UBC, he has been a Post-Doctoral Fellow in School of Computer Science and Engineering at Seoul National University for one and half years. Dr. Chen’s research interests include algorithmic, optimization and performance issues in wireless ad hoc and sensor networks and multimedia communications over wireless networks. He was interviewed by Chinese Canadian Times where he appeared on the celebrity column in 2007. He is the author of a textbook OPNET Network Simulation (Tsinghua Univ. Press, 2004). Dr. Chen received the Best Paper Runner-up Award from The Fifth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (QShine) 2008. Victor C.M. Leung received the B.A.Sc. (Hons.) and PhD degrees, both in electrical engineering, from the University of British Columbia (UBC) in 1977 and 1981, respectively. He was the recipient of many academic awards, including the APEBC Gold Medal as the head of the 1977 graduate class in the Faculty of Applied Science, UBC, and the NSERC Postgraduate Scholarship. From 1981 to 1987, Dr. Leung was a Senior Member of Technical Staff and satellite systems specialist at MPR Teltech Ltd. In 1988, he was a Lecturer in Electronics at the Chinese University of Hong Kong. He returned to U.B.C. as a faculty member in 1989, where he is a Professor and holder of the TELUS Mobility Research Chair in Advanced Telecommunications Engineering in the Department of Electrical and Computer Engineering. His research interests are in mobile systems and wireless networks. Dr. Leung is a Fellow of IEEE and a voting member of ACM. He is an editor of the IEEE Transactions on Wireless Communications, an associate editor of the IEEE Transactions on Vehicular Technology, and an editor of the International Journal of Sensor Networks. Shiwen Mao received the Ph.D. degree in Electrical and Computer Engineering (ECE) from Polytechnic University, Brooklyn, NY in 2004. He was a Research Scientist at Virginia Tech, Blacksburg, VA from December 2003 to April 2006. Currently, he is an Assistant Professor in ECE at Auburn University, Auburn, AL. Dr. Mao’s research interests include modeling and optimization of wireless networks, cognitive networks, and multimedia communications. He is on the Editorial Board of the Hindawi Advances in Multimedia Journal and the Wiley International Journal of Communication Systems. Dr. Mao received the 2004 IEEE Communications Society Leonard G. Abraham Prize in the Field of Communications Systems and the Best Paper Runner-up Award from The Fifth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness (QShine) 2008. He is the co-author of a textbook TCP/IP Essentials: A Lab-Based Approach (Cambridge Univ. Press, 2004). 相似文献
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Lightweight Deployment-Aware Scheduling for Wireless Sensor Networks 总被引:14,自引:0,他引:14
Wireless sensor networks consist of a large number of tiny sensors that have only limited energy supply. One of the major
challenges in constructing such networks is to maintain long network lifetime as well as sufficient sensing areas. To achieve
this goal, a broadly-used method is to turn off redundant sensors. In this paper, the problem of estimating redundant sensing
areas among neighbouring wireless sensors is analysed. We present simple methods to estimate the degree of redundancy without
the knowledge of location or directional information. We also provide tight upper and lower bounds on the probability of complete
redundancy and on the average partial redundancy. With random sensor deployment, our analysis shows that partial redundancy
is more realistic for real applications, as complete redundancy is expensive, requiring up to 11 neighbouring sensors to provide
a 90 percent chance of complete redundancy. Based on the analysis, we propose a scalable Lightweight Deployment-Aware Scheduling
(LDAS) algorithm, which turns off redundant sensors without using accurate location information. Simulation study demonstrates
that the LDAS algorithm can reduce network energy consumption and provide desired QoS requirement effectively.
This research was partially supported by Natural Sciences and Engineering Research Council of Canada.
Kui Wu received his Ph.D. in Computing Science from the University of Alberta, Canada, in 2002. He joined the Department of Computer
Science at the University of Victoria, Canada in the same year and is currently an Assistant Professor there. His research
interests include mobile and wireless networks, network performance evaluation, and network security.
Yong Gao received his Master's degree and Ph.D. degree in computer science from University of Alberta, Canada, in 2000 and 2005 respectively.
He is currently with the Irving K. Barber School of Arts and Sciences, UBC Okanagan, Canada. His research interests include
search algorithms and AI, communication networks, and computational biology.
Yang Xiao worked at Micro Linear as an MAC (Medium Access Control) architect involving the IEEE 802.11 standard enhancement work before
he joined Department of Computer Science at The University of Memphis in 2002. Dr. Xiao is an IEEE Senior member. He was a
voting member of IEEE 802.11 Working Group from 2001 to 2004. He currently serves as Editor-in-Chief for International Journal
of Security and Networks (IJSN) and for International Journal of Sensor Networks (IJSNet). He serves as an associate editor
or on editorial boards for the following refereed journals: (Wiley) International Journal of Communication Systems, (Wiley)
Wireless Communications and Mobile Computing (WCMC), EURASIP Journal on Wireless Communications and Networking, and International
Journal of Wireless and Mobile Computing. He serves as five lead/sole guest editor for five journal special issues. He serves
as a referee/reviewer for many funding agencies, as well as a panelist for NSF. His research interests are Security/ Reliable
Communications, Medium Access Control, Mobility/Location/Paging Managements, Cache Access and Replacement Policies, Quality
of Service, Energy Efficiency, and Routing in wireless networks and mobile computing. 相似文献