基于EPON的宽带网接入技术1.doc

基于EPON的新型宽带接入技术研究 A New Broadband Access Technology Based on EPON XXX （中国民航大学通信与信息系统 研一） 摘要：FTTH（Fiber to the Home）（ONU）FTTx 的一种接入方式，是最靠近用户的光接入网应用类型。EPON是 PON 技术中技术最成熟，应用最广的一种，以其成本低、维护简单、容易扩展、易于升级，提供非常高的带宽，服务范围大，带宽分配灵活，使得 FTTH商用成为一种可能，并成为未来 4～5 年我国电信产业发展的一个新亮点。 本论文首先对近几年来宽带接入及其相关领域出现的新概念、新技术和新系统作了一个简单介绍，其中概述了光接入网的拓扑结构和应用类型，以及 FTTH 中点对点，点对多点的两种技术模式。其次，对组建 FTTH 可以用到的几种技术如 APONE、PON、GPON 等作了较为详细的论述和比较，分析了其中的关键技术,如 OLT 的测距，带宽的分配，快速比特同步等。并阐述了选用 EPON 实现 FTTH 的理由。接下来，作者通过自己亲自参加的辽宁石油化工大学教师公寓接入校园网工程规划、部署及工程实施，详细介绍了用 EPON 实现 FTTH、FTTB 的宽带接入技术理论，设备构建及工程测试等具体工作。并结合实际情况，解决了现场施工中存在的其它问题，通过各种专业测试，该工程完全满足技术指标要求。 关键词：FTTH EPON 宽带接入网 基于以太网的无源光网络 Abstract: FTTH (Fiber to the Home) is the optical network unit (ONU) installed on the home user or business user, is a FTTx access, is the closest to the users application of the type of optical access network. FTTH is being promoted in China, at the same time, with the gradual maturity of PON technology, particularly EPON (Ethernet Passive Optical Network) is the PON technology in the most mature technology, the most widely used one by IEEE802.3EFM (Ethernet for the First Mile) Put forward. It is its low cost, simple maintenance, easy expansion, easy upgrade, to provide very high bandwidth services, bandwidth allocation and flexible, making FTTH may be a business and become the next 4 to 5 years of Chinas telecom industry development The new bright spot. EPON is the use of so-called passive optical network (PON) topology of the realization of carrying a variety of business Ethernet signal transmission in the form of a network, that is, the PON fiber-optic transmission of the changes in the length of the Ethernet frame signal, the basic principles of APON with a similar structure and G. .983 on the basis of trying to retain the essence of the APON - physical layer PON, and Ethernet to replace the ATM as a data link layer protocol. So as to provide a greater bandwidth, lower cost and wider opera