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摘要无线传感器网络是是传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术相结合的产物，与传统网络相比，对能量效率及数据汇聚等具有更高要求。本文重重点研究LEACH和SEP两种经典分簇算法在不同类型网络下对网络生存周期及数据汇聚等性能的影响，28074
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本文首先介绍了传感器网络的概念、结构、特点及应用；总结了其网络协议体系和路由协议的分类，分析比较了目前国内外学者提出的几种有代表性的路由协议及其性能优缺点；然后重点介绍了LEACH算法的工作原理，并仿真分析了LEACH算法在能量同构网络中网络生存周期及吞吐率等性能指标；最后介绍了SEP算法的主要机制，并在能量异构网络模型中仿真分析对比了SEP及LEACH算法对网络性能的影响，证明了SEP算法的优越性。
关键字：无线传感器网络；LEACH路由协议；SEP路由协议；MATLAB仿真
毕业论文设计说明书外文摘要
Title A performance study on the impact of clustered topology on data aggregation in wireless sensor networks
Abstract
Wireless sensor network is the combination of the sensor technology, embedded computing technology, distributed information processing technology and the wireless communication technology. Compared with the traditional network, it has higher requirements on energy efficiency, data gathering, etc. This paper focuses on the research of the two classical clustering algorithm ,LEACH and SEP, about the properties of the network life cycle and data gathering under different types of network,
This paper first introduces the concept, structure, characteristics and application of sensor networks, summarizes the network protocol architecture and the classification of routing protocols, analyzes and compare several kinds of typical routing protocol and its performance advantages and disadvantages which are put forward by the current domestic and foreign scholars. Then the paper mainly introduces the working mechanism of the LEACH algorithm and the study the LEACH algorithm in homogeneous networks by simulation considering data aggregation. Finally the paper introduces the main mechanism of SEP algorithm, and the make a comparative study by simulation between the SEP algorithm and LEACH algorithm in the energy heterogeneous network model. Simulation results show the superiority of SEP.
Keywords：WSN; LEACH routing protocols; SEP routing protocols; MATLAB Simulation
目 次
1 引言 1
1.1 研究背景及意义 1
1.2 国内外研究现状 2
1.3 毕业设计工作 2
2 无线传感器网络分簇算法 4
2.1 无线传感器的网络结构 4
2.2 无线传感网拓扑控制概述 6
2.3 分簇算法的特点 7
2.4 分簇算法的设计要求 7
3 LEACH分簇算法的分析研究 9
3.1 能量同构网络 9
3.2 LEACH协议 9
3.2.1 最优簇头数 10
3.2.2 簇头选举 12
3.2.3 选簇机制 14
3.3 LEACH协议的仿真 14
3.3.1 网络稳定阶段 15
3.3.2 簇头个数的变化 16
3.3.3 网络吞吐量 17
3.4 本章小结 18
4 SEP分簇算法的分析研究 19
4.1 能量异构网络 19
4.2 SEP协议 19
4.2.1 最佳簇头数 20
4.2.2 簇头选举 21
4.2.3 选簇机制 22