1、 毕业设计（论文）毕业设计（论文） 课题名称 有线电视网络双向改造设计 1 摘 要 本文描述了南宁有线电视网络的现状和正在进行的改造采取方案，对新 旧网络进行了比较，新旧网中双向业务的实现。 广电网络是基于 CATV 发展起来的 HFC 网络，传统的 HFC 网络主要是为 传输有线电视服务的，所以是以单向下行广播式的传输方式。有线电视经过 近十年的发展，光缆已经越来越靠近用户，许多光节点覆盖的用户在 500 200 户之间。广电网络为了提供如宽带接入、数字电视点播等更多增值业务， 所以必须对传统的 HFC 网络进行双向网改造。从目前技术选择来看，采用 Cable modem 方式和采用 IPQ
2、AM 方式实现双向业务的接入是较多为用户所接 受和选择的改造方案。 关键字：双向网改造、光缆、HFC、Cable modem、IPQAM。 2 Summary This text description the city of Nan Ning numeral the present condition of the television network with under way of reformation adopt a project, rightness new the old network carried on comparison, in the old net double
3、 to business of realization, new the receive of program in the system with delivered to carry on analysis. The brocasting network is the HFC network which get up according to the CATV development, tradition of HFC network main is in order to deliver cabled T.V. service, so with one-way bottom line b
4、roadcasting deliver of type way.Cabled T.V. through the development in decade, the fiber optic cable have already more and more closed to a customer, many light the node overlay of customer at 500 of 200, the electric cable radius be or so in the 500 m.Brocasting network for providing to take to con
5、nect to go into such as the breadth, numeral television point sow etc. be more to increase in value business, so have to tradition of the HFC network carry on a double toward the net reformation.From currently technique choice to see, The adoptionIPQAM way and way of the Cable modem are more to is accept by customer with choice of reformation project. Keyword: Double to net reformation、Fiber optic cable、HFC、Cable modem、IPQAM。 3 目 录 第一章 绪论 5 1.1 网络现状 5 1.2 改造必要性 5 1.3 改造目标 7 第二章 网络改造前双向业务的实现 8 1、系统概述 8 2、系统频谱规划 9 3、系统特点 9 4、系统功能模块简介 10 5、 UCLink 接入技术特点 11 第三章 网络
