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基于分环多跳的无线传感网分簇路由算法 总被引:15,自引:0,他引:15
为了提高无线传感网在大区域情形下的能量效率,提出了一种分环多跳分簇路由算法RBMC(ring based multi-hop clustering routing algorithm).RBMC算法采用分环的方式实现簇头间的多跳通信,通过在不同环内构建大小不同的簇解决传感器网络中存在的"热点"问题,在不同的簇头选举策略下,能够同时满足节点能量同构及异构两种情形.仿真结果表明,在大区域环境下,分环多跳分簇路由算法能在很大程度上均衡节点能量消耗,延长网络的生命周期. 相似文献
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在无线多媒体传感器网络(Wireless Multimedia Sensor Networks,WMSNs)中,由于节点部署的不合理,往往存在较多的监控盲区,影响了网络的服务质量。为了提高网络的覆盖率,在有向感知模型基础的基础上,提出了一种基于粒子群算法的WMSNs覆盖增强算法PSOCE。PSOCE算法以网络覆盖率为优化目标,以粒子群算法为计算工具,同时对节点的位置与主感知方向进行调整。仿真试验表明,PSOCE算法能够有效地改进WMSNs的覆盖质量,网络的覆盖率能提高6%~12%。 相似文献
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In this paper, a Tabu search based routing algorithm is proposed to efficiently determine an optimal path from a source to a destination in wireless sensor networks (WSNs). There have been several methods proposed for routing algorithms in wireless sensor networks. In this paper, the Tabu search method is exploited for routing in WSNs from a new point of view. In this algorithm (TSRA), a new move and neighborhood search method is designed to integrate energy consumption and hop counts into routing choice. The proposed algorithm is compared with some of the ant colony optimization based routing algorithms, such as traditional ant colony algorithm, ant colony optimization-based location-aware routing for wireless sensor networks, and energy and path aware ant colony algorithm for routing of wireless sensor networks, in term of routing cost, energy consumption and network lifetime. Simulation results, for various random generated networks, demonstrate that the TSRA, obtains more balanced transmission among the node, reduces the energy consumption and cost of the routing, and extends the network lifetime. 相似文献
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During range-based self-localization of Wireless Sensor Network (WSN) nodes, the number and placement methods of beacon nodes have a great influence on the accuracy of localization. This paper proves a theorem which describes the relationship between the placement of beacon nodes and whether the node can be located in 3D indoor environment. In fact, as the highest locating accuracy can be acquired when the beacon nodes form one or more equilateral triangles in 2D plane, we generalizes this conclusion to 3D space, and proposes a beacon nodes selection algorithm based on the minimum condition number to get the higher locating accuracy, which can minimize the influence of distance measurement error. Simulation results show that the algorithm is effective and feasible. 相似文献
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提出了基于有界增长图的虚拟骨干近似形成算法(VBF).算法采用网络划分机制构建极大独立集,使用染色过程形成簇图;以2分离集合子集递归计算(1 ε)近似局部最小支配集,合并局部最优解构造全局最优解:然后调整簇头传输范围直接以全局最优解形成最小近似连通支配集,无须加入网关节点,降低计算开销.构造的连通支配集具有常量扩展因子和常量度,并且算法运行时节点仅需直接邻域信息.理论分析和仿真比较证明了算法的正确性和有效性. 相似文献
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经典分簇路由算法在每轮的数据采集过程中均需要重新选举簇头和簇的划分,使得网络的拓扑结构极不稳定以及增加了不必要的网络开销,因此提出了一种基于半固定分区的无线传感器网络分簇算法.该算法在首轮,对传感器网路进行簇头的随机选举和簇的划分且其它轮不再重新分簇,然后在各个簇内依据节点的剩余能量和到汇聚节点的距离进行簇头的选举.实验结果表明,与传统分簇协议中的全网广播簇头选举机制相比,该算法不仅拥有稳定的簇结构,而且网络工作稳定期延长了约69.62%,有效地提高了无线传感器网络的可靠性. 相似文献
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For the redundancy coverage of nodes leads to the phenomenon of low energy efficiency,Non-cooperative game theory was used to solve it.A revenue function was proposed,which considering the coverage of nodes and the residual energy.The lifetime of the node and network path gain were applied to revenue function.The network topology was built by nodes with the appropriate work strategy.Control algorithm coverage in wireless sensor network was proposed based on Non-cooperative game theory.A Nash equilibrium between the coverage rate and the residual energy was proved,and the return function converged to the Pareto optimal.Experiments show that the algorithm can provide reasonable coverage of network nodes and ensure energy efficiency. 相似文献
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Photonic Network Communications - In this paper, we consider the problem of clustering nodes in a wireless visible light communication (VLC) network while simultaneously forming a spanning tree... 相似文献
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基于RSSI无线传感器网络空间定位算法 总被引:11,自引:1,他引:11
RSSI测距技术在实际应用环境中,由于多径、绕射、障碍物等因素,无线电传播路径损耗使得定位过程中产生距离误差.通过对三维空间定位过程中产生距离误差区域进行分析,提出了基于RSSI新的空间定位算法ERSS,该定位算法计算简单,定位过程中节点间不增加通信开销,无需硬件扩展.仿真实验表明该算法较普通的基于RSSI的测距方法定位精度和响应时间有了明显的改进,适合在通信开销小、硬件要求低的传感器网络节点上应用. 相似文献
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新的无线传感器网络分簇算法 总被引:10,自引:1,他引:9
针对无线传感器网络节点能量受限的特点,提出了一种响应式分布分簇算法(RDCA,responsive distributedclustering algorithm).该算法不需预先得知节点自身及其他节点的位置信息,而仅根据局部拓扑信息快速进行分布式的簇头选举,并根据代价函数进行簇的划分,适用于周期性获取信息的无线传感器网络.分析与仿真表明,该算法具有良好的负载平衡性能和较小的协议开销,与LEACH协议相比,能够减少能量消耗,网络生存期大约延长了40%. 相似文献
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Jie Wang Qinghua Gao Hongyu Wang Hongyang Chen Minglu Jin 《Wireless Communications and Mobile Computing》2012,12(10):891-900
Benefitting from its ability to estimate the target state's posterior probability density function (PDF) in complex nonlinear and non‐Gaussian circumstance, particle filter (PF) is widely used to solve the target tracking problem in wireless sensor networks. However, the traditional PF algorithm based on sequential importance sampling with re‐sampling will degenerate if the latest observation appear in the tail of the prior PDF or if the observation likelihood is too peaked in comparison with the prior. In this paper, we propose an improved particle filter which makes full use of the latest observation in constructing the proposal distribution. The quality prediction function is proposed to measure the quality of the particles, and only the high quality particles are selected and used to generate the coarse proposal distribution. Then, a centroid shift vector is calculated based on the coarse proposal distribution, which leads the particles move towards the optimal proposal distribution. Simulation results demonstrate the robustness of the proposed algorithm under the challenging background conditions. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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针对无线传感器网络的节点能量有限,且在进行信息传输时存在数据冲突、传输延时等问题,提出并设计了基于最大生存周期的无线传感器网络数据融合算法。该算法将整个网络中的节点分成多个簇,并根据节点的传输范围,将每个簇中的节点均匀分布,每个节点根据自己的本地信息和剩余能量选择通信方式向簇头节点传输数据,从而形成传输数据的最短路径;并根据集中式TDMA(时分多址)调度模型,运用基于微粒群的Pareto优化方法,使得网络在完成规定的信息传输时每个节点耗费的平均时隙和平均能耗最优。仿真结果表明,上述算法不但可以最大化网络的生存时间,还可以有效的降低数据融合时间,减少网络延时。 相似文献
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基于矢量的无线传感器网络节点定位综合算法 总被引:2,自引:0,他引:2
基于DV-hop设计了一种节点的定位综合算法,并将其应用于移动节点.利用节点间估计距离和测量距离的差异构建位置校正矢量;通过改进的粒子群优化方法得到节点的校正步长;节点将其与位置校正矢量的乘积作为自身位置的校正值.通过仿真进行算法验证并分析了复杂度和有效性,结果证明该算法可以将DV-hop的定位误差下降75%,并且适用于稀疏网络. 相似文献