【作者】 李瑞芳；

【导师】 谭永东；

【作者基本信息】 西南交通大学 ， 检测技术与自动化装置， 2005， 硕士

【摘要】 集成了传感器、嵌入式计算、网络和无线通信四大技术而形成的无线传感器网络是一种全新的信息获取和处理技术,它是一种新型的无基础设施的无线网络,能够协作地实时监测、感知和采集各种环境或监测对象的信息,并对其进行处理,传送到需要这些信息的用户。无线传感器网络是计算机科学技术的一个新的研究领域,具有十分广阔的应用前景,引起了学术界和工业界的高度重视。 由于无线传感器网络面临通信能力有限、能源有限和网络动态性等方面的难题,所以设计合适的路由协议非常重要。本文在分析传感器网络体系结构的基础上,分析和比较了国外提出的几种无线传感器网络的路由协议,仿真计算结果表明,定向扩散是一种较为合适的路由方式。 定向扩散是以数据为中心的,因为所有的通信以数据命名。在定向扩散中所有基于网络的节点是应用可知的,这就使得扩散能够通过选择有经验的好路径并通过缓存和处理内部网络的数据来获得能量的节省。本文在分析定向扩散具体的传播方式基础上,对定向扩散与组播和泛洪这两种路由方式进行了理论上的比较,得出定向扩散较传统方式的优势所在,然后经NS2平台的仿真测试,证明定向扩散协议是一种较为理想的无线传感器网络的路由协议。 最后对本文所做的工作进行了总结,并对未来的研究工作进行了展望。更多还原

【Abstract】 Wireless Sensor Network(WSN), which is made by the convergence of sensor , nested computation, networks and wireless communication technologies, is a novel technology about acquiring and processing information. It is a late-model wireless network of infrastructure less network and can be used for testing, sensing, collecting and processing information of monitored objects. WSN is a new research area of computer science and technology and has a wide application future. Both academia and industries are very interested in it.Because WSN is confronted with many difficulties, such as limited communication ability, limited resources and mobile network etc, so designing reasonable routing protocol is very important. The author analyzed and compared some routing protocols that proposed by oversea researcher, taking for directed diffusion as an appropriate method.Directed diffusion is data-centric in that all communication is for named data. All nodes in a directed diffusion -based network are application-aware. This enables diffusion to achieve energy savings by selecting empirically good paths and by caching and processing data in-network. The paper firstly analysis propagation mode of directed diffusion, then compare directed diffusion to multicast and flooding, the results which simulated on the NS2 show that Directed diffusion is an ideal routing mode for WSN.In the last, we have a summary on the thesis, and look into the prospect of future research work.更多还原