基于剩余能量和节点度的多跳分簇算法的研究

LEACH协议是第一个在无线传感器网络中提出的分簇路由协议,由于其簇头产生的随机性,产生了一些不足,因此为了均衡整个网络的能耗,延长WSN的生命周期,提出了基于节点剩余能量和节点度的多跳分簇路由协议。其基本思想是在LEACH中加入门限,让剩余能量高且节点度高的节点优先成为簇头,簇头之间采用多跳路由传输机制。仿真结果表明,该协议能够有效地延长网络的生命期。     

矿井无线通信网络中LEACH协议的改进

针对矿井下无线传感器网络通信的特点,对LEACH协议分簇进行优化,并充分考虑能量和距离的因素,对簇头节点的选取进行优化,提出基于K-means++聚类的路由算法LEACH-KPPE,有效地改善了LEACH算法中簇头节点分布不均、能耗不均以及网络的稳定性等问题。仿真实验结果表明,该算法有效地改善了整个网络的能耗,提高了能量的利用率,有效延长了网络的生命周期。     

无线传感器网络分簇路由协议研究

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。     

一种LEACH路由协议算法的改进与分析

基于传统的LEACH协议,提出了一种改进协议LEACH-CND。对无线传感器网络的簇头选举进行了优化,主要依据节点的剩余能量选举簇头,并求出网络的最佳簇头数。其次,基于椭圆曲线密码体制的优势,针对无线传感器网络节点轻量级身份密钥加密算法进行了探讨。最后,在MATLAB环境下对优化后的协议进行了仿真,证明了其可行性。达到了延长网络生存时间的目的。     

基于节点位置的无线传感器网络分簇路由协议

针对LEACH协议生成非均匀簇造成能量损耗的问题,以网络簇头分布最优和降低能量损耗为目的,从选择簇头节点、形成簇、簇间路由等方面做了改进。经过理论分析和仿真实验与LEACH和LEACH-C算法比较,结果表明,该路由协议的设计使各节点较均衡地消耗能量,节点生存时间更长,延长了整个无线传感器网络的生命周期。     

基于能量均衡的LEACH改进协议

能量有限性是无线传感器网络（WSN）的最重要的特性,在网络路由算法中也是优先考虑的一个主要因素。LEACH路由协议是无线传感器网络中被广泛应用的分层协议,但其簇头选取的随机性,不可避免的使该协议存在着簇头选择不合理,节点能耗不均衡的缺点。本文对一些LEACH的改进协议进行研究,在此基础上提出了一种新的LEACH改进协议,并通过理论分析证明了该协议的可靠性。     

基于混沌粒子群与蚁群算法的WSN路由协议

为了降低无线传感器网络（WSN）能量消耗,延长网络生存周期,提出了一种基于混沌粒子群（CPSO）和蚁群算法相结合的路由协议。该协议针对典型的分簇协议LEACH（Low-Energy Adaptive Clustering Hierarchy）协议的簇头选择进行了优化,考虑了节点剩余能量和簇内密集性等因素,采用新的混沌粒子群算法对簇头选择进行优化。然后,针对LEACH协议簇头到基站采用单跳通信,容易使簇头早亡的问题,采用蚁群算法优化簇头到基站的路由路径,减少通信消耗的能量。仿真结果表明,与传统的LEACH协议相比,新的协议能有效减少能量消耗,延长网络生命周期。     

基于LEACH协议的无线传感器网络路由算法的改进与仿真

针对无线传感器网络中传感器能量有限的问题,从路由算法的角度出发,提出LEACH协议的低功耗改进方案.本文采用划定区域的方式对LEACH协议中的簇头选举进行改进,从而减少网络中节点分布不均匀的情况对簇头节点能量损耗所造成的影响,并使用NS-2进行协议改进前后的仿真.仿真实验结果表明,协议改进后网络生存期有效增长,能量消耗...     

无线传感器网络LEACH路由协议改进

由于无线传感器网络(Wireless Sensor Networks,WSN)中节点能量有限,需要设计能量有效的协议,以延长网络的生存时间。在LEACH路由协议的基础上,综合考虑节点已经充当簇头的次数、剩余能量和地理位置参数来优化簇头的选择机制,提出了LEACH-W路由协议算法。实验结果表明,LEACH-W算法具有更长的网络生命周期。     

无线传感器网络LEACH协议的研究与改进

无线传感器网络(WSN)的数据传输不能与路由协议分离,高效的能量传输是无线传感器网络中最重要的因素之一。针对LEACH簇头分布的不均匀以及与基站距离的不同,提出了一种改进的LEACH算法,该算法考虑剩余能量和最优簇头,与现有的LEACH协议相比,该协议降低了能耗。     

基于改进SSA优化WSN分簇协议

无线传感器网络(Wireless Sensor Networks,WSN)的路由协议是无线传感器网络领域中的一个研究热点.针对LEACH协议的不足,提出一种基于自适应t分布改进麻雀搜索算法(Improved Sparrow Search Algorithm,ISSA)的改进LEACH协议(LEACH?ISSA),以解决...     

An efficient cluster-based communication protocol for wireless sensor networks

A wireless sensor network is a network of large numbers of sensor nodes, where each sensor node is a tiny device that is equipped with a processing, sensing subsystem and a communication subsystem. The critical issue in wireless sensor networks is how to gather sensed data in an energy-efficient way, so that the network lifetime can be extended. The design of protocols for such wireless sensor networks has to be energy-aware in order to extend the lifetime of the network because it is difficult to recharge sensor node batteries. We propose a protocol to form clusters, select cluster heads, select cluster senders and determine appropriate routings in order to reduce overall energy consumption and enhance the network lifetime. Our clustering protocol is called an Efficient Cluster-Based Communication Protocol (ECOMP) for Wireless Sensor Networks. In ECOMP, each sensor node consumes a small amount of transmitting energy in order to reach the neighbour sensor node in the bidirectional ring, and the cluster heads do not need to receive any sensed data from member nodes. The simulation results show that ECOMP significantly minimises energy consumption of sensor nodes and extends the network lifetime, compared with existing clustering protocol.     

A new algorithm for cluster head selection in LEACH protocol for wireless sensor networks

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.     

基于冗余节点的LEACH协议的改进

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...     

Multi-factor and Distributed Clustering Routing Protocol in Wireless Sensor Networks

One of important issues in wireless sensor networks is how to effectively use the limited node energy to prolong the lifetime of the networks. Clustering is a promising approach in wireless sensor networks, which can increase the network lifetime and scalability. However, in existing clustering algorithms, too heavy burden of cluster heads may lead to rapid death of the sensor nodes. The location of function nodes and the number of the neighbor nodes are also not carefully considered during clustering. In this paper, a multi-factor and distributed clustering routing protocol MFDCRP based on communication nodes is proposed by combining cluster-based routing protocol and multi-hop transmission. Communication nodes are introduced to relay the multi-hop transmission and elect cluster heads in order to ease the overload of cluster heads. The protocol optimizes the election of cluster nodes by combining various factors such as the residual energy of nodes, the distance between cluster heads and the base station, and the number of the neighbor nodes. The local optimal path construction algorithm for multi-hop transmission is also improved. Simulation results show that MFDCRP can effectively save the energy of sensor nodes, balance the network energy distribution, and greatly prolong the network lifetime, compared with the existing protocols.     

无线传感器网络的分区异构分簇协议研究

针对无线传感器网络能量受限和路由协议中节点能量消耗不均衡的问题,提出一种新的无线传感器网络的分区异构分簇协议(PHC协议).该协议的核心是将3种不同能量等级的节点根据能量的不同分别部署在不同区域,能量较高的高级节点和中间节点使用聚类技术通过簇头直接传输数据到汇聚点,能量较低的普通节点则直接传输数据到汇聚点.仿真结果表明,该协议通过对节点合理的分配部署,使簇头分布均匀,更好地均衡了节点的能量消耗,延长了网络的稳定期,提高了网络的吞吐量,增强了网络的整体性能.     

基于TinyOS的无线传感器网络LEACH算法的改进

LEACH协议是无线传感器网络中最流行的分簇路由协议之一.针对LEACH算法簇分布不均匀以及网络能耗不均衡等问题提出了一种高效节能多跳路由算法.在簇建立阶段,新算法根据网络模型计算出最优簇头间距值,调整节点通信半径以控制簇的大小,形成合理网络拓扑结构;在数据传输阶段,簇头与基站之间采用多跳的通信方式,降低了节点能耗.在TinyOS操作系统下,使用nesC语言设计实现了LEACH-EEMH算法.基于TOSSIM平台的仿真结果表明,新算法较LEACH算法在均衡网络能耗、延长网络寿命方面具有显著优势.     

Clustering routing protocol based on improved PSO algorithm in WSN

Aiming at the problem that the location distribution of cluster head nodes filtered by wireless sensor network clustering routing protocol was unbalanced and the data transmission path of forwarding nodes was unreasonable,which would increase the energy consumption of nodes and shorten the network life cycle,a clustering routing protocol based on improved particle swarm optimization algorithm was proposed.In the process of cluster head election,a new fitness function was established by defining the energy factor and position equalization factor of the node,the better candidate cluster head node was evaluated and selected,the position update speed of the candidate cluster head nodes was adjusted by the optimized update learning factor,the local search and speeded up the convergence of the global search was expanded.According to the distance between the forwarding node and the base station,the single-hop or multi-hop transmission mode was adopted,and a multi-hop method was designed based on the minimum spanning tree to select an optimal multi-hop path for the data transmission of the forwarding node.Simulation results show that the clustering routing protocol based on improved particle swarm optimization algorithm can elect cluster head nodes and forwarding nodes with more balanced energy and location,which shortened the communication distance of the network.The energy consumption of nodes is lower and more balanced,effectively extending the network life cycle.     

无线传感网络中基于蚁群的路由算法

In the wireless sensor networks, high efficient data routing for the limited energy resource networks is an important issue. By introducing Ant-colony algorithm, this paper proposes the wireless sensor network routing algorithm based on LEACH. During the construction of sensor network clusters, to avoid the node premature death because of the energy consumption, only the nodes whose residual energy is higher than the average energy can be chosen as the cluster heads. The method of repeated division is used to divide the clusters in sensor networks so that the numbers of the nodes in each cluster are balanced. The basic thought of ant-colony algorithm is adopted to realize the data routing between the cluster heads and sink nodes, and the maintenance of routing. The analysis and simulation showed that the proposed routing protocol not only can reduce the energy consumption, balance the energy consumption between nodes, but also prolong the network lifetime.