共查询到20条相似文献,搜索用时 2 毫秒
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基于分簇的无线传感器网络路由协议,采用多跳路由方式传输数据至基站,容易造成靠近基站的节点转发大量数据而过早失效。另外,分簇协议通常假定网络节点是能量同构的,不能有效解决节点能量异构的问题。因此,从非均匀分簇的角度出发,结合局部竞争簇首机制,提出了一种基于能量异构的分簇协议(EHUC)。仿真结果表明该协议能够有效应用于能量异构的无线传感器网络,并延长网络的生命周期。 相似文献
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提出了一种能量有效的基于聚类的传感器网络路由协议—EEHCA(an Energy-Efficient Hierarchical Clustering Algorithm for wireless sensor networks)。该协议通过最小化通信能量消耗并在所有节点之间实现能量消耗负载平衡的方式,达到了延长传感器网络生存时间的目的。协议提出了一种新颖的簇首确定机制,该机制可以避免感知区域内的节点进行频繁的簇首选举,从而节约了能量。为提高传感器网络的容错性能,引入了备用簇首的概念。在簇首与基站通信方面,采用多跳传输的方式进行,从而避免了距离基站较远的簇首进行长距离通信时所造成的能量过早耗尽的问题。仿真结果表明提出的协议拥有比LEACH和HEED协议更长的网络生存时间。 相似文献
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Several three-party password authenticated key exchange (3-PAKE) protocols have recently been proposed for heterogeneous wireless sensor networks (HWSN). These are efficient and designed to address security concerns in ad-hoc sensor network applications for a global Internet of Things framework, where a user may request access to sensitive information collected by resource-constrained sensors in clusters managed by gateway nodes. In this paper we first analyze three recently proposed 3-PAKE protocols and discuss their vulnerabilities. Then, based on Radio Frequency Identification technologies we propose a novel 3-PAKE protocol for HWSN applications, with two extensions for additional security features, that is provably secure, efficient and flexible. 相似文献
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高数据融合的非均匀分簇无线传感器网络路由协议* 总被引:1,自引:2,他引:1
探讨了基于非均匀分簇的无线传感器网络路由协议,提出了一种高数据融合的非均匀分簇无线传感器网络路由协议。仿真实验结果表明,该路由协议有效地平衡了无线传感器网络的节点能耗,延长了网络的存活时间。 相似文献
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无线传感器网络中一种能量均衡的分簇策略 总被引:4,自引:2,他引:4
以无线传感器网络中的能量消耗模型为基础,提出了一种能量均衡的无线传感器网络分簇路由协议EECHS(energy-effficient cluster-head selection)。该协议通过节点的剩余能量和节点距离基站的距离来调节其成为簇首的概率,并进一步调节簇的大小。仿真结果表明,与改进后的DCHS协议相比,该策略使网络的生命周期和稳定周期分别提高了31%和45%以上。 相似文献
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无线传感器网络分簇协议通常假定网络是同构的,即网络中所有节点具有相同的初始能量,这些协议不能充分利用异构网的特点。提出了一种适合于异构网的分布式分簇协议(EHCP),该协议优先选择剩余能量较多的节点作为簇首以平衡节点的能量,并在簇间采用多跳通信以节省能量。仿真实验结果表明:与同类协议相比,EHCP协议能显著地延长网络稳定工作的时间,具有良好的性能。 相似文献
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根据无线传感器网络节点能量消耗和网络生存周期的特点,通过建立动态规划能量优化模型,在路由总能耗满足能量阈值约束条件下,均衡消耗网络中各节点能量,在此基础上提出一种适合无线传感器网络的动态规划路由算法。仿真结果表明,提出的路由算法能充分地利用有限的能量资源,较大地延长网络生存周期并降低节点的平均能耗。 相似文献
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成簇算法是传感器网络中减少能量消耗的一种关键技术,它能够增强网络的扩展性和延长网络的生存时间。异构传感网络在能量节约方面的性能更好。提出一种适应异构无线传感器网络的分布式能量有效的成簇方案DEECUDK。该方案首先利用部署知识部署节点,使能量在整个监测区域分布比较均匀,然后以节点的剩余能量与传感半径之内的节点的剩余覆盖能量为主参数,其相邻节点个数为辅参数来选举簇头节点。较高初始能量、剩余能量和相邻节点数多的节点比其他节点拥有更多的机会成为簇头节点,并引入活动节点判别式,不需要增加任何开销来减少簇内冗余数据量,从而使网络能量均匀消耗,延长网络的生存时间。通过模拟实验结果,与现有的异构传感网络成簇算法相比,新的算法在网络生存时间与网络吞吐量方面有着更好的性能。 相似文献
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Xuejun LIU Jihong GUAN Guangwei BAI Haiming LU 《Frontiers of Computer Science in China》2009,3(3):427-434
The interest in small-world network has highlighted the applicability of both the graph theory and the scaling theory to the
analysis of network systems. In this paper, we introduce a new routing protocol, small world-based efficient routing (SWER),
dedicated to supporting sink mobility and small transfers. The method is based on the concept of the small worlds where the
addition of a small number of long-range links in highly clustered networks results in significant reduction in the average
path length. Based on the characteristic of sensor networks, a cluster-based small world network is presented, and an analytical
model is developed to analyze the expected path length. SWER adopts a simple and effective routing strategy to forward data
to the mobile sink in a small transfer scene and avoid expensive mechanisms to construct a high quality route. We also study
the routing scheme and analyze the expected path length in the case where every node is aware of the existence of p long-range links. In addition, we develop a hierarchical mechanism in which the mobile sink only transmits its location information
to the cluster heads when it enters a new cluster. Thus we also avoid expensive cost to flood the location of the mobile sink
to the whole network. 相似文献
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针对现有密钥管理方案抗俘获性差和占据存储空间大等缺点,提出了一种分层的密钥管理方案。簇头节点采用了Blom矩阵,有效提高了簇头节点抗击俘获的能力;簇内节点利用中国剩余定理,在将复杂计算转交给基站的同时,降低了组密钥的存储空间。通过对比分析,该方案较好地满足了WSNs密钥管理的相关指标,提高了安全性能。 相似文献
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The interest in small-world network has highlighted the applicability of both the graph theory and the scaling theory to the analysis of network systems. In this paper, we introduce a new routing protocol, small world-based efficient routing (SWER), dedicated to supporting sink mobility and small transfers. The method is based on the concept of the small worlds where the addition of a small number of long-range links in highly clustered networks results in significant reduction in the average path length. Based on the characteristic of sensor networks, a cluster-based small world network is presented, and an analytical model is developed to analyze the expected path length. SWER adopts a simple and effective routing strategy to forward data to the mobile sink in a small transfer scene and avoid expensive mechanisms to construct a high quality route. We also study the routing scheme and analyze the expected path length in the case where every node is aware of the existence of p longrange links. In addition, we develop a hierarchical mechanism in which the mobile sink only transmits its location information to the cluster heads when it enters a new cluster. Thus we also avoid expensive cost to flood the location of the mobile sink to the whole network. 相似文献
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在充分考虑异构无线传感器网络自身特点的基础上,针对现有无线传感器网络密钥管理中存在的问题,利用基于身份的加密算法(Identity-Based Cryptography,IBC),提出了一种异构无线传感器网络密钥管理方案(KMUIBC),并从该方案的安全性、连通性、可扩展性、有效性等方面进行分析,与现有的一些典型方案进行了分析比较,结果表明,KMUIBC有较好的性能。 相似文献
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为改善LEACH中节点能耗不均而过早失效的情况,提出了一种能量有效的无线传感器网络层次型路由协议EEHRP,它采用一种智能延迟策略选取簇头,尽可能使得剩余能量越高的节点时延越小,它们能够先于周围剩余能量较低的节点发送簇头通告。在路由算法中引入了网关节点,能有效避免簇头远距离传送数据造成的能耗过多。仿真表明,EEHRP可使节点的能量消耗更均匀,有效地延长了网络生存时间。 相似文献
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为了提高无线传感器网络的能量利用率和延长网络的生命周期,提出了基于地理位置的能量高效的动态成簇算法(GL-DC),在簇的建立阶段,采用非均匀分簇方法,解决了簇首能量消耗不均衡问题。在网络运行过程中,采用基于剩余能量和距离来动态生成新的簇首,避免了靠近SINK节点的簇头因转发大量数据而过早耗尽能量。仿真实验结果表明,该方法具有更好的性能,与EADEEG、LEACH和PEGASIS等路由协议相比,GL-DC路由协议有效地均衡了节点能量消耗,显著地延长了网络生命周期。 相似文献
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