共查询到19条相似文献,搜索用时 62 毫秒
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射频能量捕获技术是解决传统无线传感网由于节点电量有限而生命周期受限的有效方法。现有的射频能量源移动供电方案中,能量源可以无限制地沿任何方向行进到网络区域内的任一位置来给节点供电。然而在现实场景中,能量源通常只能沿着既有道路行进。考虑能量源行进路径约束下的供电总时延最小化问题,分别提出全程移动供电方案和部分位置停留供电方案,并提出高效算法来确定这两个方案的最佳行进路径和供电时间。仿真结果表明,两种方案的供电总时延均显著优于转折点供电基准方案。相比于部分位置停留供电方案,全程移动供电方案的计算复杂度较低,但供电总时延更长一些。 相似文献
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交通路灯监控系统的无线传感网链状路由算法 总被引:1,自引:0,他引:1
在交通路灯监控系统中为节省网络节点能耗和降低数据传输时延,提出一种无线传感网链状路由算法(CRASMS)。该算法根据节点和监控区域的信息将监控区域分成若干个簇区域,在每一个簇区域中依次循环选择某个节点为簇头节点,通过簇头节点和传感节点的通信建立簇内星型网络,最终簇头节点接收传感节点数据,采用数据融合算法降低数据冗余,通过簇头节点间的多跳路由将数据传输到Sink节点并将用户端的指令传输到被控节点。仿真结果表明,CRASMS算法保持了PEGASIS算法在节点能耗方面和LEACH算法在传输时延方面的优点,克服了PEGASIS算法在传输时延方面和LEACH算法在节点能耗方面的不足,将网络平均节点能耗和平均数据传输时延保持在较低水平。在一定的条件下,CRASMS算法比LEACH和PEGASIS算法更优。 相似文献
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在交通路灯监控系统中为节省网络节点能耗和降低数据传输时延,提出一种无线传感网链状路由算法(CRASMS)。该算法根据节点和监控区域的信息将监控区域分成若干个簇区域,在每一个簇区域中依次循环选择某个节点为簇头节点,通过簇头节点和传感节点的通信建立簇内星型网络,最终簇头节点接收传感节点数据,采用数据融合算法降低数据冗余,通过簇头节点间的多跳路由将数据传输到Sink节点并将用户端的指令传输到被控节点。仿真结果表明:CRASMS算法保持了PEGASIS算法在节点能耗方面和LEACH算法在传输时延方面的优点,克服了PEGASIS 算法在传输时延方面和LEACH算法在节点能耗方面的不足,将网络平均节点能耗和平均数据传输时延保持在较低水平。在一定的条件下,CRASMS算法比LEACH和PEGASIS算法更优。 相似文献
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分簇结构是大规模无线传感网(WSN)的一种有效的拓扑管理方法。在这种结构下,由于簇头(Cluster Head,CH)节点的能耗速率远高于簇成员节点(Cluster Member,CM),需要做簇头轮换以平衡网络能耗。该文分析了基于能量驱动的簇头轮换策略,并提供一种基于簇头节点实时负载来估计其启动轮换的能量阈值的自适应簇头轮换算法(Adaptive Cluster Rotation Algorithm,ACRA)。仿真结果表明,与现有算法如LEACH,EDAC等比较,ACRA算法最少化簇头轮换次数,延长了网络生存时间。 相似文献
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本文针对移动无线传感网提出一种结合节点移动向量和接收信号强度指示值RSSI(Received Signal Strength Indicator)信息的机会主义路由OR-RSSI,利用Sink节点Beacon报文的RSSI信息建立并更新机会概率值,使用报文广播后所能到达的具有最大机会概率值的最佳节点进行存储转发,完成移动无线传感网信息收集.OR-RSSI是一种良好的后择路由,不以既存路径为基础,不需额外设备支持,具有报文成功传输率高、网络有效吞吐量大以及能耗低等优点. 相似文献
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针对无线传感网节点电池供电的弊端,提出了一种基于环境能量的收集方案。在简单评估了一些主流的环境能源的基础上,详细介绍了三种环境能量源的收集方案,包括整流、滤波以及稳压等环节的设计,并结合能量收集芯片给出具体电路。通过各种方案的实验数据,给出了各方案适用的场合以及效果。 相似文献
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时延和时延抖动约束的低费用多播路由算法 总被引:3,自引:0,他引:3
为了有效支持交互式实时组播业务,不仅要考虑时延约束,而且要考虑时延抖动约束,同时还需高效管理网络资源,以降低多播费用。本文提出了一种新的时延和时延抖动约束的低费用我播路由启发式算法,仿真结果表明该算法复杂度较低,时延抖动较小,又降低了网络费用,是一种快速有效的多播路由算法。 相似文献
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无线传感器网络中基于空间相关性的移动代理路由算法 总被引:1,自引:0,他引:1
资源受限的传感器节点密集分布在无线传感器网络监控区域,sink节点通过收集节点间观测信息对监控区域内发生的事件进行感知.本文提出SCMAR(Spatial Correlation-based Mobile Agent Routing)路由算法,在移动代理架构内,利用节点观测数据的空间相关性以能量有效的方式对感知事件进行... 相似文献
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Mohammad Abdul Azim M. Rubaiyat Kibria Abbas Jamalipour 《Wireless Communications and Mobile Computing》2009,9(1):103-115
Optimized routing (from source to sink) in wireless sensor networks (WSN) constitutes one of the key design issues in prolonging the lifetime of battery‐limited sensor nodes. In this paper, we explore this optimization problem by considering different cost functions such as distance, remaining battery power, and link usage in selecting the next hop node among multiple candidates. Optimized selection is carried out through fuzzy inference system (FIS). Two differing algorithms are presented, namely optimized forwarding by fuzzy inference systems (OFFIS), and two‐layer OFFIS (2L‐OFFIS), that have been developed for flat and hierarchical networks, respectively. The proposed algorithms are compared with popular routing protocols that are considered as the closest counterparts such as minimum transmit energy (MTE) and low energy adaptive clustering hierarchy (LEACH). Simulation results demonstrate the superiority of the proposed algorithms in extending the WSN lifetime. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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针对一类基于移动代理的无线传感器网络内移动代理的迁移路由问题,提出了一种基于网格和遗传算法的移动代理迁移路由算法.该方法通过改进的自适应遗传算法获取迁移的基路径信息,再结合网络网格化和路由修复策略来实现路由节点失效时的路由修复,从而有效降低能耗和实现成功迁移. 相似文献
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Chunsheng Zhu Lei Shu Takahiro Hara Lei Wang Shojiro Nishio Laurence T. Yang 《Wireless Communications and Mobile Computing》2014,14(1):19-36
Wireless sensor networks (WSNs) which is proposed in the late 1990s have received unprecedented attention, because of their exciting potential applications in military, industrial, and civilian areas (e.g., environmental and habitat monitoring). Although WSNs have become more and more prospective in human life with the development of hardware and communication technologies, there are some natural limitations of WSNs (e.g., network connectivity, network lifetime) due to the static network style in WSNs. Moreover, more and more application scenarios require the sensors in WSNs to be mobile rather than static so as to make traditional applications in WSNs become smarter and enable some new applications. All this induce the mobile wireless sensor networks (MWSNs) which can greatly promote the development and application of WSNs. However, to the best of our knowledge, there is not a comprehensive survey about the communication and data management issues in MWSNs. In this paper,focusing on researching the communication issues and data management issues in MWSNs, we discuss different research methods regarding communication and data management in MWSNs and propose some further open research areas in MWSNs.Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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The application of wireless sensor networks (WSNs) technology in monitoring systems is demanding more efficient services to fulfill the requirements of the monitoring task. For this purpose, the simultaneous presence of features such as different communication mediums (air and water) used by nodes and various sizes of data generated by heterogeneous nodes are the key obstacles to build a communication protocol, which can ensure the reliable data delivery. This work terms such WSNs as mixed wireless sensor networks (MWSNs) which contains the aforementioned features. In this paper, we introduce a new cross‐layer protocol for mixed wireless sensor network (XMSN) which can adapt these features. The proposed cross layer protocol XMSN for such mixed environment is implemented and analyzed extensively in Castalia simulator. The performance of XMSN is compared with composition of well‐known protocols, namely, CTP plus BoX‐MAC‐2. The result shows that XMSN has better efficiency in terms of end‐to‐end delay, energy consumption, and goodput than that of CTP plus BoX‐MAC‐2 protocol. 相似文献
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Considering severe resources constraints and security threat hierarchical routing protocol algorithm. The proposed routing of wireless sensor networks (WSN), the article proposed a novel protocol algorithm can adopt suitable routing technology for the nodes according to the distance of nodes to the base station, density of nodes distribution, and residual energy of nodes. Comparing the proposed routing protocol algorithm with simple direction diffusion routing technology, cluster-based routing mechanisms, and simple hierarchical routing protocol algorithm through comprehensive analysis and simulation in terms of the energy usage, packet latency, and security in the presence of node protocol algorithm is more efficient for wireless sensor networks. compromise attacks, the results show that the proposed routing 相似文献
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An Energy-Efficient Routing and Self-Organization Algorithm in Wireless Sensor Networks 总被引:3,自引:5,他引:3
LIU Li-feng ZOU Shi-hong ZHANG Lei CHENG Shi-duan State Key Laboratory of Networking Switching Beijing University of Posts Telecommunications Beijing P.R. China 《中国邮电高校学报(英文版)》2005,12(2)
1IntroductionAs the development of MEMStechnology,the microsensors whichintegrate manyfunctions such as sensing,signal processing and communication have been widelyused[1]. Wireless Sensor Network ( WSN) is construct-ed with hundreds to thousands of sensors and one ormore SINKs .Sensors can sense (monitor) many physi-cal signals such as sound,light ,electronics ,tempera-ture and humidity of the objects in a given region[2 ~3].Sensors transfer these signalsinto sensing data and sendsensin… 相似文献
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