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Ali Khalid Rasid Mohd Fadlee A. Sali Aduwati Ali Borhanuddin 《Wireless Personal Communications》2020,111(3):1853-1870
Wireless Personal Communications - A prediction-based method is presented to track mobile object and its location in a sensor network area. In recent years, energy consumption and high accuracy... 相似文献
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无线传感网络(WSN)研究 总被引:15,自引:0,他引:15
随着智能化、网络化传感器技术的日益成熟,具有潜在的巨大应用价值的无线传感网络引起人们的重视与研究.文章介绍了无线传感网络的特点和结构形式,并对传感网络目前的研究动态、研究方向以及挑战作了重点介绍,同时对其广泛的应用前景做了描述. 相似文献
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本文提出了一种基于分簇结构的无线传感器网络MAC协议.在基于层次式路由协议的分簇网络结构中,通过综合基于竞争和基于时分复用协议的优缺点,将时间划分为交替的随机访问和调度访问两个阶段,在随机访问阶段簇内节点采用CSMA/CA实现无线信道共享.在调度访问阶段,节点根据簇首分配的时隙实现数据无冲突通信.在簇与簇之间采用FDMA避免信道干扰实现网络的扩展.分析和仿真结果表明本协议在能量效率、时间同步和网络扩展上都有所改进. 相似文献
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为了提高无线广播网络中数据包的传输效率,提出了一种新的基于二进制网络编码的高效无线广播重传方法(WBRBNC).法基于数据包分布矩阵(PDM),在广播重传过程中使用一种新的数据包算法选取编码包,对这些丢包采用二进制网络编码方法进行编码,然后再进行广播,使一次广播重传可以使多个具有不同丢包的接收机受益.分析和仿真表明,该方法能有效保证接收节点的编码可解性,使重传次数显著减少,更接近于理论值,从而大大提高了传输效率.另外,该方法计算开销小,很适合应用在卫星广播网和无线传感器网等资源受限的系统中. 相似文献
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无线传感器网络的安全技术研究 总被引:2,自引:1,他引:2
无线传感器网络(WSN)是通过无线通信方式形成的一个多跳自组织网络,是集信息采集、信息传输、信息处理于一体的智能化信息系统。由于其本身资源方面存在的局限性和脆弱性,使其安全问题成为一大挑战。文中分析了无线传感器网络的安全需求、可能受到的安全攻击,给出了防御方法和解决方案。通过安全加密协议、认证流广播和多种密钥机制实现传感器网络的数据机密性、完整性和系统鲁棒性。 相似文献
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针对无线传感器网络环境下低功耗路由问题,根据无线传感器网络是一种以数据为中心的网络的特点,提出了一种基于内容的低功耗路由协议CBP。其基本思想是:Sink节点根据上层应用构造谓词,并对谓词进行广播,网络中所有传感节点以Sink节点的谓词为依据建立路由表,实现数据路由。与现有无线传感器网络路由协议相比较,此路由协议具有低功耗,占用节点资源少,网络容错能力强等特点。仿真结果表明,在节点数量大于100的大规模网络中,基于内容的无线传感器网络路由协议功耗比定向扩散协议功耗降低19%。 相似文献
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针对无线传感器网络容易受噪音干扰的问题,在以往的工作基础上提出了一种新的业务流预测算法CAWP(Cellular Annealing-based Wavelet Prediction)。该算法首先利用小波变换对业务流进行分解,并将其小波系数作为抗体群。同时,采用定义的元胞演化规则代替免疫克隆退火中的交叉和变异操作,以获得下一时刻最优的小波系数。最后,通过仿真实验对比分析了该算法与其他算法之间的性能状况,结果表明CAWP具有较好的适应性。 相似文献
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博弈模型在传感器网络安全中的应用 总被引:1,自引:0,他引:1
入侵检测是传感器网络安全的重要研究内容,论文基于博弈论中的非合作模型提出了一种新型传感器网络入侵检测方案。该方案用一种只有两个参与者(攻击者和传感器网络)的非零非合作博弈模型来描述传感器网络中入侵检测问题,并证明了这个博弈模型可以达到纳什均衡,据此可以制定一个防御策略有效地提高入侵被检测到的概率。模拟试验证明这一模型是有效可行的。 相似文献
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The MACORA is presented to solve the collision between mobile agent and multicast suppression in channel competitive process. With two-layer graph model, the channel converter problem in the dual-channel wireless sensor networks can be simplified into a routing problem over the two-layered graph, so we can search for routes in the control plane and transport traffic in the data plane synchronously. Then, the control plane and the data plane are integrated into a two-layered network, and searching for route for each traffic in the two-layer networks synchronously. The MACORA can make full use of the idle resource in different layers, this strategy deals with the collision between mobile agent and multicast suppression in channel competitive process well, so the blocking probability of networks and the error rate of packet transmission can be cut down. Simulation results show that the MACORA performs better in improving success rate of packet transmission. 相似文献
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The objective of this paper is to develop a new adaptive iterative linear regression based clustering algorithm for wireless sensor network. According to this, the initial cluster is classified horizontally and vertically in parallel, each resulting in two sub-clusters. Of these two, the best is selected based on the proposed similarity index and with this selected cluster as reference, iteration continues until the convergence criterion ‘Delta’ is met. The similarity index is designed based on the intra cluster similarity and inter cluster dissimilarity. Delta is the difference between the similarity index of the current iteration and the previous iteration. The proposal is implemented in MATLAB and simulations are carried out under different network scenarios. The cluster quality is evaluated through external and internal indices using the Cluster Validity Analysis Platform tool. The cluster obtained by the proposal is studied and its quality is compared with the well-established k-means and hierarchical clustering. The performance indices confirm the supremacy of the proposal. 相似文献
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在基于分簇的无线传感器网络中,为了有效地转发数据,研究者们提出了各种簇组织和簇首选举机制,但是这些机制缺少关注簇首与汇聚节点之间数据传输的可靠性.针对该问题,提出一种可靠的数据路由方案,通过链路代价函数和动态的簇首间路由,控制簇首到汇聚节点的数据转发.仿真结果表明,该方案不仅有效地增加数据包的投递率,也能够均衡网络的能量消耗. 相似文献
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毫米波技术和无线传感器网络是目前各国研究的热点。随着毫米波器件的发展,使得其应用于无线传感器网络成为可能。从国内外公开发表的文献资料来看,这项应用虽然不甚成熟,但是其发展潜力巨大,有很多复杂问题有待研究解决。简要阐述了毫米波通信技术在无线传感器网络,特别是军用无线传感器网络中应用所具有的优势,对需要进一步解决的问题进行了研究分析。 相似文献
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面向应用的无线传感器网络 总被引:1,自引:0,他引:1
结合具体的应用环境分析了无线传感器网络发展到第二阶段需要考虑的重点问题;探讨了基于上述应用需求的无线传感器网络的协议栈结构和今后的研究方向。 相似文献
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In recent times, there have been many advances in the field of information theory and wireless sensor network (WSN) technologies. Network coding is a new paradigm in data transport and promises to change many aspects of WSN. This paper proposes a network coding multipath routing algorithm in WSN (NC-WSN). It is typically proposed in order to increase the reliability of data transmission or to provide load balancing. We evaluate and compare our technique with several existing approaches by a set of simulations, using different scenarios and topologies. The simulations results suggest that the multipath diversity achieved with our proposition can significantly improve the network response time. 相似文献