光纤接入网的研究与设计EPON 接入技术-电子与通信专业论文.docxVIP

光纤接入网的研究与设计 光纤接入网的研究与设计(EPON 接入技术) I I 摘 要 近年来，骨干网的能力进一步增强，与此同时接入网方面却没有大的改进。接入网 能力的增长远远落后于 Internet 流量的快速增长，因而接入网成为高效的 LAN 和骨干 网发展的瓶颈，又被称为“最后一公里”。 随着人们对带宽需求的不断增长, 传统的铜 线接入方式已经不能满足用户的需求, 接入手段光纤化成为接入网的发展方向。EPON由 于集中了以太网设备价格低廉和光纤能够提供高带宽的优点，成为新一代接入网的最佳 选择。 本论文首先从接入网的基本概念出发，对接入网的定义与定界和拓扑结构进行介绍， 然后介绍了目前流行的几种宽带接入技术，引出 EPON 接入技术，并对 EPON 技术的产 生背景、网络结构、工作原理和技术特点作进一步介绍；进而从 EPON 业务接入出发， 分析 EPON 系统支持的业务类型以及需求，设计了一套支持多业务的接入解决方案，达 到了宽带、高速、多业务的接入要求。从 EPON 的应用角度，阐述 EPON 接入网的组网原 则，并针对不同类型的用户接入。 FTTH 光纤到户是光纤通信的一个亮点，伴随着相应技术的成熟与实用化，成本 进一步降低到家庭能承受的水平，光纤到户已是大势所趋，本论文 最后以某普通住宅 小区为实例具体设计光纤接入到户。 关键词：接入网；EPON；多业务；FTTH；普通住宅小区 II II Abstract In recent years, the capability of Backbone Network has been more increased; the access network has not much improvement in the meantime. The rate of increase of capability of the access network is far behind the flow of Internet, so the access network has become the bottleneck of the development of the high efficiency LAN and Backbone Network, and it goes the name of “the last one kilometer”. With the continuously increasing demand for bandwidth, the traditional w ay of copper cable access cannot satisfy the user requirements and FTTx has become the direction of access network development. Due to EPON is a technology with the advantages of the low-price Ethernet equipments and fiber which can provide high bandwidth, it becomes the best choice of the new access network. The article proceed from the basic concept of access network, introduces the definition and demarcation/topological structure of access network, then introduces some Broadband access technologies that are popular now, to draw the access technology of EPON, and father introduces the background of generation/ network structure/theory of operation/technique feature of EPON; And proceed from the service access of EPON, analyze the service types and demands which EPON system supports, design a access scheme which can support different services ， and the subjects supply all the u