有线电视网络扩容与双向改造

发布时间：2018-07-01 07:56

本文选题：有线电视 + 双向传输　；参考：《福州大学》2014年硕士论文

【摘要】：在现代社会生活中有线电视网络是人们生活中一个不可或缺的重要组成部分,例如：酒店、公共场所、汽车、飞机、轮船和火车等诸多场所中,人们都可以发现电视的踪影。有线电视网络担负着传播信息,提供人们娱乐节目的重要功能,伴随着人们生活质量的提高,人们对于广播电视网络提出了越来越高的要求,广电运营商也相应的推出了数字电视、视频点播、宽带上网等新的业务来满足要求。本课题主要基于通过增加以及更换器件,同时通过比较CMTS+CM、EPON+LAN、EPON+EOC、 RFoG、Fiber Deep HFC五种不同的接入网技术,来选择一种对原有线电视单向网络做出一定的改变,以实现网络的双向化改造。论文选取某小区双向化改造实例,从其改造需求、改造方案的选定、以及施工进行详细的分析介绍。同时详细的分析EPON+EOC技术方案特点、适用范围、技术实现方式等。双向改造以PON技术为主干,通过增加新的光设备OLT和ONU,在前端机房通过波分复用技术将广播和窄播信号混合后传输至OLT,经由OLT再传输至光节点,广播信号直接进入光站,窄播数据信号经由ONU转换成射频信号后,在光站中与广播信号相互混合,再传输至用户家中。到达用户家中后,电视信号直接传输至机顶盒用于收看电视,数据信号送至用户家中的EOC终端以供上网。对于网络的扩容问题,将整个网络分成三个部分,前端机房、传输网络、分配网络分别进行探讨。前端机房的扩容采用了增加机房使用面积、设立分机房、提高信道调制效率的方法,对于传输段部分使用增加光缆的使用数量、运用波分复用技术,对于分配网络的扩容采用减少每个光节点所覆盖用户数量,以及将网络升级为1GHz传输带宽的方法,以此来实现网络的扩容。论文选取福州市广电网络万隆机房扩容实例,从其改造需求、改造方案的选定、以及施工进行详细的分析介绍。本课题所选取的小区双向改造和网络扩容实例,均达到了预期的目的,双向改造成功实现了单向网络转变为双向传输网络,机房扩容实现了新增36个下行光输出口,新增40个上行接入口的目标。两个实例均符合设计和施工规范,为运营商更好的为用户服务创造了良好的条件,为运营商增加户均收入奠定了基础。
[Abstract]:In modern society, cable television network is an indispensable part of people's life, such as: hotels, public places, cars, planes, ships and trains, people can find television. CATV network plays an important role in spreading information and providing entertainment programs for people. With the improvement of people's quality of life, people put forward higher and higher requirements for radio and television networks. Radio and television operators have also introduced new services such as digital television, video on demand and broadband Internet access to meet the requirements. This thesis is mainly based on the comparison of five different access network technologies: CMTS CMN EPON EPON EPON EOC, RFoG Fiber Deep HFC, to choose one of the original CATV one-way network to make certain changes, in order to realize the bidirectional transformation of the network. In this paper, a bidirectional transformation example of a certain district is selected, and detailed analysis and introduction are made from its reconstruction demand, the selection of transformation scheme, and the construction. At the same time, the characteristics of EPON EOC technology scheme, the scope of application, the implementation of technology and so on are analyzed in detail. By adding new optical devices OLT and ONUUN, the broadcast and narrow broadcast signals are mixed and transmitted to OLTs in the front-end computer room through the PON technology, and then transmitted to the optical node via OLT, and the broadcast signals directly enter the optical station. After the narrow broadcast data signal is converted into radio frequency signal by ONU, the broadcast signal is mixed with each other in the optical station and transmitted to the user's home. After arriving at the user's home, the TV signal is transmitted directly to the set-top box for watching TV, and the data signal is sent to the EOC terminal in the user's home for Internet access. For the problem of network expansion, the whole network is divided into three parts: front computer room, transmission network and distribution network. The expansion of the front-end computer room adopts the method of increasing the area of the computer room, setting up the sub-computer room and improving the efficiency of the channel modulation. For the part of the transmission section, the use of increasing the number of optical cables is increased, and the technology of wavelength division multiplexing is used. The expansion of the network is realized by reducing the number of users covered by each optical node and upgrading the network to 1GHz transmission bandwidth. The paper selects Fuzhou broadcast network Wan Long computer room expansion example, from its transformation demand, the transformation plan selection, as well as the construction carries on the detailed analysis and introduction. The bidirectional transformation and network expansion examples selected in this paper have achieved the desired purpose. The two-way transformation has successfully transformed the one-way network into a two-way transmission network, and the computer room has expanded its capacity to realize 36 additional downlink optical transmission outlets. Add 40 additional targets for uplink access. The two examples are in line with the design and construction specifications, which create good conditions for operators to better serve users, and lay the foundation for operators to increase average household income.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN943.6

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