共查询到19条相似文献,搜索用时 78 毫秒
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无线传感器网络(WSN)的许多应用都是基于节点的位置信息.本文从WSN的基于测距的定位算法和无需测距的定位算法对其定位算法进行详细的说明.并分析比较各定位算法的优缺点.最后还指出了WSN的自身定位问题的研究方向. 相似文献
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研究无线传感器网络节点定位的方法。首先介绍了节点定位的基本原理,在总结节点定位原理的基础上,对节点定位方法的分类依据进行了归纳。在对无线传感器网络节点定位方法的研究中,主要对是否基于测距的节点定位方法进行具体分析,介绍了2种类型的定位方法的基本原理,并对2种类型的定位方法中的典型算法做了具体说明,最后介绍了定位算法的评价标准。 相似文献
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无线传感器网络(WSN)是由大量靠无线多跳方式通信的智能传感器节点构成的网络,围绕WSN出现了许多新的研究内容,节点定位是其中一个很重要的方面。本文综述了无线传感网络近年来的自定位算法,分别分析了各种算法的优缺点。最后还讨论了节点自定位算法所采取的一些安全措施。 相似文献
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RSSI理论下无线传感器网络节点定位算法探究 总被引:1,自引:0,他引:1
节点定位作为无线传感器网络的一个基础性问题,同时随着微处理技术、网络通信技术、嵌入式计算技术以及传感技术的快速发展和日臻完善,具有超强感知能力、通信和计算能力的无线传感器网络节点的定位技术开始越来越多地受到人们的关注.本文在这一背景下提出了一种基于接收信号强度指示的无线传感器网络节点的自身定位算法即RSSI算法.全文从RSSI算法的介绍谈起,然后对RSSI算法的误差进行了细致的分析,最后就改进的RSSI算法作了详细的说明. 相似文献
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移动无线传感器网络(MWSN)是一种全新的信息获取和处理技术,可以在广泛的应用领域内实现复杂的大规模监测和追踪任务,而移动节点的位置信息则是其应用的基础。针对这一特征,文章深入探讨了移动节点自定位算法的研究现状,介绍了移动无线传感器网络节点定位的基本方法,讨论了定位算法的性能评价指标,并对各种算法性能进行了比较,最后指出了算法存在的问题和解决办法。文章认为三维全节点移动的定位算法将成为以后的研究趋势。 相似文献
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Wireless Personal Communications - Wireless sensor networks (WSN) are widely used in various domains such as military, health applications, environmental applications, structural monitoring,... 相似文献
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作为一种全新的信息获取和处理技术,拥有十分广泛的应用前景,其中,节点定位是重要的核心技术之一,同时也是无线传感器网络技术及应用的最核心的技术基础。目前已有的定位方法主要是按照基于测距和非基于测距进行分类总结。在研究大量相关文献的基础上,用一种全新的视角对目前现有的定位方法进行重新分类,介绍了WSN无线信号衰减模型,提出一种基于RSSI校验的加权质心节点定位算法,且与相关定位算法进行了比较分析和仿真实验得出结论。 相似文献
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一种无线传感网终端系统设计 总被引:2,自引:0,他引:2
对无线传感器网络的特点进行了分析和总结。以低功耗、短距离多跳通信为出发点提出了系统设计思路和方法,讨论了系统设计中的关键技术和问题并给出相应的解决策略。在设计中采用了超低功耗的单片机并提出了超帧异步的通信方式。分析了系统设计上的一些问题,给出了相应的解决方法。 相似文献
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Xu Kenan Hassanein Hossam Takahara Glen Wang Quanhong 《Mobile Computing, IEEE Transactions on》2010,9(2):145-159
In a heterogeneous wireless sensor network (WSN), relay nodes (RNs) are adopted to relay data packets from sensor nodes (SNs) to the base station (BS). The deployment of the RNs can have a significant impact on connectivity and lifetime of a WSN system. This paper studies the effects of random deployment strategies. We first discuss the biased energy consumption rate problem associated with uniform random deployment. This problem leads to insufficient energy utilization and shortened network lifetime. To overcome this problem, we propose two new random deployment strategies, namely, the lifetime-oriented deployment and hybrid deployment. The former solely aims at balancing the energy consumption rates of RNs across the network, thus extending the system lifetime. However, this deployment scheme may not provide sufficient connectivity to SNs when the given number of RNs is relatively small. The latter reconciles the concerns of connectivity and lifetime extension. Both single-hop and multihop communication models are considered in this paper. With a combination of theoretical analysis and simulated evaluation, this study explores the trade-off between connectivity and lifetime extension in the problem of RN deployment. It also provides a guideline for efficient deployment of RNs in a large-scale heterogeneous WSN. 相似文献
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Selection and rotation of cluster head (CH) is a well known optimization problem in hierarchical Wireless sensor networks (WSNs), which affects its overall network performance. Population-based metaheuristic particularly Artificial bee colony (ABC) has shown to be competitive over other metaheuristics for solving optimization problems in WSNs. However, its search equation contributes to its insufficiency due to poor exploitation phase and low convergence rate. This paper, presents an improved artificial bee colony (iABC) metaheuristic with an improved search equation, which will be able to search an optimal solution to improve its exploitation capabilities moreover, in order to increase the global convergence of the proposed metaheuristic, an improved approach for population sampling is introduced through Student’s-t distribution. The proposed metaheuristic maintain a balance between exploration and exploitation search abilities with least memory requirements, with the use of first of its kind compact Student’s-t distribution, which is particularly suitable for WSNs limited hardware environment. Further utilising the capabilities of the proposed metaheuristic, an improved artificial bee colony based clustering and scheduling (iABC-CS) scheme is introduced, to obtain optimal cluster heads (CHs) along with optimal CH scheduling in WSNs. Simulation results manifest that iABC-CS outperform over other well known clustering algorithms on the basis of packet delivery ratio, energy consumption, network lifetime and end to end delay. 相似文献
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Sheikhi Hemmat Hoseini Mohamad Sabaei Masoud 《Wireless Personal Communications》2021,116(4):3277-3289
Wireless Personal Communications - Compressive sensing (CS) is a new sampling theory used in many signal processing applications due to its simplicity and efficiency. However, signal reconstruction... 相似文献