共查询到20条相似文献,搜索用时 525 毫秒
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异构传感器网络中一种能量有效的簇头选择算法 总被引:2,自引:0,他引:2
针对无线传感器网络的异构性,提出了一种能量有效的双簇头产生算法DCHsS(Double Cluster Heads Selection Al-gorithm)以减轻簇头负担以及均衡网络能耗.与已有簇头选择算法相比,DCHsS基于双簇头思想进行改进,在每个簇中选出两个节点(分别定义为"中转"簇头和"通信"簇头),分别承担簇头节点的任务-簇内数据处理和簇外数据通信.此外,DCHsS采用了一种全新的簇头竞争参数,使得拥有较高剩余能量、较低通信能耗和较强数据处理能力的节点优先成为簇头,以更好地解决节点能量异构网络的负载均衡问题.实验结果表明,在异构网络中,DCHsS算法在能量消耗上优于单簇头方案,能更有效的利用节点能量和减少簇头能耗. 相似文献
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为了解决分簇路由协议中簇头由于管理簇内数据和传输簇间数据导致簇头消耗过多能量而缩短网络生存周期的问题,提出了一种基于簇间冗余路径和簇内节点密度的分簇路由协议;首先,加入能量因素以改进簇头选举方式,提出了一种基于节点密度和基站距离的非均匀分簇方法以减少靠近基站和节点密集区的簇头负载,采用节点存储多条从簇头到基站的冗余路径以增强路径的可靠性;仿真实验证明基于冗余路径和节点密度的分簇路由,能实现网络区域的非均匀分簇、最大程度地均衡节点负载,且较其它方法具有较长的网络生命期和较多的信息传输量. 相似文献
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为了减少无线传感器网络(WSNs)分簇路由中簇头的能量消耗,提出了一种基于布谷鸟搜索(CS)优化的双簇头分簇路由算法.CS通过采用节点的剩余能量和节点之间的位置关系来构造适应值函数并选举出最优双簇头.其中,主簇头将数据进行融合,副簇头将融合的数据发送给基站,缓解了以往单簇头同时负责数据融合和传输的双重压力,使得整体能耗在各个节点的分配更均衡.仿真实验表明:与LEACH算法、粒子群优化(PSO)算法相比,CS算法在减小网络能耗以及延长网络生存周期上更具优势. 相似文献
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分簇技术主要目标是延长整个传感器网络的生存时间。好的分簇技术可以提高无线传感器网络的可扩展性。就"热区"内的负载平衡问题,以及频繁的簇头轮换和簇重组问题,对基于GAF算法的完全簇头选择算法进行改进,结合双簇头模型和单簇头模型的优点,提出了一种无线传感器网络簇头非均匀分布算法,有效地平衡"热区"内节点的能耗,延长了无线传感器网络的生命期。 相似文献
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优化分簇的无线传感器网络路由算法 总被引:1,自引:0,他引:1
延长传感器网络的生存周期,降低网络节点的能耗成为无线传感器网络(WSN)研究的关键.由于无线传感器网络能量有限,针对LEACH算法中簇首分布不均、簇首数目偏离最优值等对网络能耗的影响,提出了一种同时考虑节点剩余能量、最优簇数和簇首分布状况来选择簇首的算法EBCS-LEACH.新算法使簇首数目为最佳,以满足能量阈值的节点才能当选为簇首和对簇首的分布进行了相应调整.仿真结果表明,EBCS-LEACH算法延长了网络的生存周期,相比LEACH算法生命周期延长19.5%,同时能耗也更加均衡. 相似文献
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Dynamic cluster head for lifetime efficiency in WSN 总被引:3,自引:0,他引:3
Saving energy and increasing network lifetime are significant challenges in wireless sensor networks (WSNs). In this paper, we propose a mechanism to distribute the responsibility of cluster-heads among the wireless sensor nodes in the same cluster based on the ZigBee standard, which is the latest WSN standard. ZigBee supports ad hoc on-demand vector (AODV) and cluster-tree routing protocols in its routing layer. However, none of these protocols considers the energy level of the nodes in the network establishing process or in the data routing process. The cluster-tree routing protocol supports single or multi-cluster networks. However, each single cluster in the multi-cluster network has only one node acting as a cluster head. These cluster-heads are fixed in each cluster during the network lifetime. Consequently, using these cluster-heads will cause them to die quickly, and the entire linked nodes to these cluster-heads will be disconnected from the main network. Therefore, the proposed technique to distribute the role of the cluster head among the wireless sensor nodes in the same cluster is vital to increase the lifetime of the network. Our proposed technique is better in terms of performance than the original structure of these protocols. It has increased the lifetime of the wireless sensor nodes, and increased the lifetime of the WSN by around 50% of the original network lifetime. 相似文献
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针对最大连通度算法簇头节点负载过重,各簇头间负载极不均衡的问题,提出一种双簇头分簇算法。该算法根据节点度和剩余能量优化簇头选取,提高了网络体系的稳定性。同时剩余能量最大的网关节点作为另一簇头分担一部分节点,即保持了原算法分组投递时延少的优点,又减轻了负载过重簇头节点的负担。通过仿真试验验证,新算法显著延长了网络生命周期。 相似文献
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MANET网关辅助抑制开销分群路由协议研究 总被引:2,自引:0,他引:2
针对MANET现有分群路由协议中群首负担过重,群合并时引发全网泛洪甚至连锁反应等问题,提出一种MANET网关辅助抑制开销分群路由协议GORP。在该协议中,网关在路由维护与数据传送中分担群首的部分工作,以降低群首的负担,使得群首不再成为整个网络的瓶颈;当群首移动导致群合并时,让运动群首作为第二个群的普通成员,原来静止的群首担任新群的群首,最大限度保证群的稳定性。仿真结果表明GORP协议在节点移动或节点数少和多的情况下都能获得好的性能,能满足MANET路由需求。群结构的稳定还将有利于MANET基于群的路由安全策略的实施。 相似文献
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基于能量感知的双簇头数据收集协议 总被引:2,自引:0,他引:2
针对无线传感器网络的簇结构中簇头节点消耗能量过快而容易成为死亡节点的问题,提出了一种能量感知的双簇头数据收集协议EADC,通过在簇内增加一个副簇头来负责主簇头节点的数据转发功能,分担了主簇头的能量消耗,使主簇头成为死亡节点的概率降低,从而有效延长了网络寿命。实验分析结果表明,与EADEEG算法相比,EADC能够将死亡节点出现的时间有效延长30轮,使网络使用寿命明显延长。 相似文献
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针对无线传感器网络中多跳通信造成的“热区”问题,改进EEUC路由协议,提出基于非均匀分簇的WSN双簇头路由算法。将数据监测区域分为近区与远区,各区域的簇内可产生主副两个簇头,近区的副簇头负责转发数据,以分担主簇头的能耗;远区的副簇头负责采集数据和融合数据,以减少簇内节点通信代价。仿真结果表明,与LEACH和EEUC算法相比,所提算法网络生存期分别延长了22.9%和10.1%,平均能量消耗减少了29.3%和8.6%,有效地均衡了网络负载,延长了网络的生命周期。 相似文献
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In order to gather information more efficiently in terms of energy consumption, wireless sensor networks (WSNs) are partitioned into clusters. In clustered WSNs, each sensor node sends its collected data to the head of the cluster that it belongs to. The cluster-heads are responsible for aggregating the collected data and forwarding it to the base station through other cluster-heads in the network. This leads to a situation known as the hot spots problem where cluster-heads that are closer to the base station tend to die earlier because of the heavy traffic they relay. In order to solve this problem, unequal clustering algorithms generate clusters of different sizes. In WSNs that are clustered with unequal clustering, the clusters close to the base station have smaller sizes than clusters far from the base station. In this paper, a fuzzy energy-aware unequal clustering algorithm (EAUCF), that addresses the hot spots problem, is introduced. EAUCF aims to decrease the intra-cluster work of the cluster-heads that are either close to the base station or have low remaining battery power. A fuzzy logic approach is adopted in order to handle uncertainties in cluster-head radius estimation. The proposed algorithm is compared with some popular clustering algorithms in the literature, namely Low Energy Adaptive Clustering Hierarchy, Cluster-Head Election Mechanism using Fuzzy Logic and Energy-Efficient Unequal Clustering. The experiment results show that EAUCF performs better than the other algorithms in terms of first node dies, half of the nodes alive and energy-efficiency metrics in all scenarios. Therefore, EAUCF is a stable and energy-efficient clustering algorithm to be utilized in any WSN application. 相似文献