共查询到19条相似文献,搜索用时 140 毫秒
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经典的分簇路由协议LEACH在无线传感器网络中有着非常广泛的应用,针对LEACH协议在成簇时没有考虑簇头节点的能量等因素的缺陷,为延长网络生存期在LEACH协议基础之上,在簇头选择公式中加入节点剩余能量的参数,使得选举能量较高的节点为簇头,提出改进的LEACH协议。并在网络模拟软件NS2平台下,对改进的LEACH协议与原LEACH协议进行仿真比较分析,结果表明改进后的协议中各个节点能耗均衡,避免个别节点过早衰亡,可以延长网络生存期。 相似文献
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针对无线传感器网络低功耗自适应集簇分层(Low Energy Adaptive Clustering Hierarchy, LEACH)路由协议因能耗不均衡导致节点过早死亡的问题,提出了一种基于遗传算法和蚁群算法改进的LEACH路由协议。在分簇阶段,通过遗传算法选举合理的簇头节点并根据节点的分布划分簇群;在数据传输阶段,通过蚁群算法使簇头节点尽可能选择能量充足且距离较短的路径进行数据传输。仿真结果表明,与传统的分簇路由协议LEACH和LEACH-C相比,改进算法可以使网络的能量消耗更加均衡,并延长网络的生命周期。 相似文献
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传统LEACH协议在选举簇头节点时,采用动态簇头选举算法,每轮选举产生簇头节点个数为最佳簇头数的概率并不是最大,使得每轮选举的簇头数偏差较大,不能使节点能量达到最优化。针对这一问题,提出了改进的LEACH-P协议,该协议在簇头选举阶段通过簇头节点间的相互协作,以少量的能量消耗来获取全局信息,消除了LEACH协议簇头选举算法的盲目性,从而改善簇头选举算法。实验结果表明,LEACH—P协议相比传统LEACH协议有效地节省了节点能量,延长了网络生命周期。 相似文献
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近年来,协同通信在无线传感器网络中取得了很大的应用,重点分析和研究了一种基于低功耗自适应集簇分层型协议(LEACH)的协同通信算法;在该算法中,通过选择合适的协同节点来发送数据可以有效的减少簇头节点的能量消耗,并且与多跳传输相比,又节省了路由更新耗费的能量,实验仿真证明基于LEACH的协同算法(LEACH-COOP)在能量消耗上与LEACH和基于LEACH的簇头多跳算法(LEACH-MH)相比表现出了更优的性能。 相似文献
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LEACH路由协议是无线传感器网络中经典的层次型拓扑组织算法。对LEACH协议进行研究和分析,指出LEACH协议在簇的区域分布和簇头负载不均衡等方面问题。文章通过节点剩余能量和与基站的距离对簇头选择、构造分簇以及非簇节点选择簇头进行改进。并利用MATLAB对改进后的算法进行仿真,表明改进后的算法有效地均衡节点能量消耗,并延长网络生存时间。 相似文献
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LEACH路由协议是无线传感器网络中经典的层次型拓扑组织算法。对LEACH协议进行研究和分析,指出LEACH协议在簇的区域分布和簇头负载不均衡等方面问题。文章通过节点剩余能量和与基站的距离对簇头选择、构造分簇以及非簇节点选择簇头进行改进。并利用MATLAB对改进后的算法进行仿真,表明改进后的算法有效地均衡节点能量消耗,并延长网络生存时间。 相似文献
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无线传感器网络中LEACH协议是一种典型的能有效延长网络生命周期的节能通信协议。因为其优秀的节能效果和其简单的规程得到了广泛的认可。但是LEACH簇头算法存在簇头开销大、簇头没有确定的数量和位置等不足。而在成簇后的稳定阶段,节点通过一跳通信将数据传送给簇头,簇头也通过一跳通信将聚合后的数据传送给基站,这样会造成簇头节点... 相似文献
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In wireless sensor network, a large number of sensor nodes are distributed to cover a certain area. Sensor node is little in size with restricted processing power, memory, and limited battery life. Because of restricted battery power, wireless sensor network needs to broaden the system lifetime by reducing the energy consumption. A clustering‐based protocols adapt the use of energy by giving a balance to all nodes to become a cluster head. In this paper, we concentrate on a recent hierarchical routing protocols, which are depending on LEACH protocol to enhance its performance and increase the lifetime of wireless sensor network. So our enhanced protocol called Node Ranked–LEACH is proposed. Our proposed protocol improves the total network lifetime based on node rank algorithm. Node rank algorithm depends on both path cost and number of links between nodes to select the cluster head of each cluster. This enhancement reflects the real weight of specific node to success and can be represented as a cluster head. The proposed algorithm overcomes the random process selection, which leads to unexpected fail for some cluster heads in other LEACH versions, and it gives a good performance in the network lifetime and energy consumption comparing with previous version of LEACH protocols. 相似文献
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Reducing the energy consumption of sensor nodes and prolonging the life of the network is the central topic in the research of wireless sensor network (WSN) protocol. The low-energy adaptive clustering hierarchy (LEACH) is one of the hierarchical routing protocols designed for communication in WSNs. LEACH is clustering based protocol that utilizes randomized rotation of local cluster-heads to evenly distribute the energy load among the sensors in the network. But LEACH is based on the assumption that each sensor nodes contain equal amount of energy which is not valid in real scenarios. A developed routing protocol named as DL-LEACH is proposed. The DL-LEACH protocol cluster head election considers residual energy of nodes, distance from node to the base station and neighbor nodes, which makes cluster head election reasonable and node energy consumption balance. The simulation results of proposed protocols are compared for its network life time in MATLAB with LEACH protocol. The DL-LEACH is prolong the network life cycle by 75 % than LEACH. 相似文献
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黄珍珍 《微电子学与计算机》2011,28(10):101-104
设计了一种基于投票的簇头选举方法,该方法使节点向能量大的节点投票,并且选票的传播距离只有一跳,不被转发,确保了邻居较多、剩余能量大的节点能够获得较多的选票.结合网络能耗来计算最优簇头个数,有效克服了LEACH协议中分簇个数和簇头选择机制上存在不足.仿真结果表明,本方法能较好适用于图书馆环境,达到监测目的. 相似文献
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Aiming at the defects of the nodes in the low energy adaptive clustering hierarchy (LEACH) protocol, such as high energy consumption and uneven energy consumption, a two-level linear clustering protocol is built. The protocol improves the way of the nodes distribution at random. The terminal nodes which have not been a two-level cluster head in the cluster can compete with the principle of equivalent possibility, and on the basis of the rest energy of nodes the two-level cluster head is selected at last. The single hop within the cluster and single hop or multiple hops between clusters are used. Simulation experiment results show that the performance of the two-level linear clustering protocol applied to the Hexi corridor agricultural field is superior to that of the LEACH protocol in the survival time of network nodes, the ratio of success, and the remaining energy of network nodes. 相似文献
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Clustering technique in wireless sensor networks incorporate proper utilization of the limited energy resources of the deployed sensor nodes with the highest residual energy that can be used to gather data and send the information. However, the problem of unbalanced energy consumption exists in a particular cluster node in the network. Some more powerful nodes act as cluster head to control sensor network operation when the network is organized into heterogeneous clusters. It is important to assume that energy consumption of these cluster head nodes is balanced. Often the network is organized into clusters of equal size where cluster head nodes bear unequal loads. Instead in this paper, we proposed a new protocol low-energy adaptive unequal clustering protocol using Fuzzy c-means in wireless sensor networks (LAUCF), an unequal clustering size model for the organization of network based on Fuzzy c-means (FCM) clustering algorithm, which can lead to more uniform energy dissipation among the cluster head nodes, thus increasing network lifetime. A heuristic comparison between our proposed protocol LAUCF and other different energy-aware protocol including low energy adaptive clustering hierarchy (LEACH) has been carried out. Simulation result shows that our proposed heterogeneous clustering approach using FCM protocol is more effective in prolonging the network lifetime compared with LEACH and other protocol for long run. 相似文献
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