EPON网络规划研究与分析.doc

EPON网络规划研究与分析 Research and analysis of EPON network planning 摘要 随着信息科技的高速发展,用户对传送信息网络的要求日益趋向高速化和精确化。严峻的形式对传统的中国电信宽带网络提出了挑战,迫使传统接入网面临转型局面。以太网无源光网络(EPON)是一个点到多点的光接入网,利用无源光网络的树型拓扑结构,采用以太网信号方式来完成多种业务的传输。EPON是几种最佳技术和网络结构的结合,EPON技术由于其维护简单,具有节省光纤资源、传输带宽较高、对网络协议透明以及较高性价比的特点,在光接入网中扮演着越来越重要的角色,并在未来很长时间内将保持竞争优势。 本文首先介绍了宽带接入技术的几种主要方式和它们的特点,并在比较了三种光纤到户技术中EPON、GP0N和P2P-Ethernet的基础上总结了 EPON技术的优势。其次,阐述了 EPON 的网络结构、工作原理及关键技术,并对几种成熟的EPON组网方式进行了分析。最后本文研 究讨论了 EPON网络的设计与规划,并在此基础上分析比较了三个工程案例,总结了 FTTN、 FTTB和FTTH三种方式在实际建设中的适用场景和工程效果。 关键词:EPON, OLT,ONU,动态带宽分配(DBA),多点控制协议(MPCP) 测距与延迟技术  Abstract With the high-speed development of information technology, peoples demands to information network increasingly trend to high speed and high precision. Severe form poses challenges to traditional China telecom broadband network, forcing traditional access network to transit. Ethernet Passive Optical Network (EPON) is a point to multiple-point optical access network which uses the tree topology configuration to supply multi-service transition with Ethernet signal form. EPON is a combination of several best technologies and the network structure. Because of its simple maintenance and characteristics such as saving fiber resources, high bandwidth, high performance-cost ratio, and etc, EPON technology plays a more and more important role in optical access network, and will maintain a competitive advantage in the future for a long time. Firstly, several main access ways of broadband access network are introduced in this thesis. Based on comparing three kinds of fiber to the home technologies (EPON, GPON and P2P-Ethernet),the advantages of EPON technology is stated. Secondly, the EPON network structure, working principle and key technologies of EPON network are expounded, and several mature EPON network modes are analyzed. Finally, the EPON network design and planning are studied and discussed in this thesis. Based on the analysis and comparison of the three engineering examples, the applying scene