[信息与通信]XX市XX村HFC双向网分析与改造.doc

摘 要 目前我国有线电视网存在着大量的HFC网络，多数中小城市的有线电视网都没有完成双向改造，这样的网络既不能承载多媒体交互业务，也不能有效实现网络、业务和用户管理，它仅能满足基本广播电视节目的传送。特别是随着IPTV、直播电视、手机电视、网络电视等新兴媒体的出现，有线电视赖以生存的空间不断受到挤压。因此，尽快建成宽带双向、稳定可靠的综合信息网，全面提升有线电视网络承载业务的能力就成了当务之急。 本文以溧阳市有线电视网络的双向改造为例，简要说明HFC网络存在的问题，介绍了HFC 网络双向改造的依据、原则，分析了目前国内有线电视双向网改造的三种主要技术方案（双向HFC技术 EPON+EOC EPON+LAN）。选择一种充分利用广播电视系统现有的机房和线缆资源，尽量低成本地把有线电视单向网络改造为交互式双向网络该方式为双向HFC。最后设计一个小区给出了方案的具体设计图纸，并进行工程概预算。 本方案是一种经济适用、优质高效的网络改造方案，具有很好的社会效益和经济效益。它可以节省大量建设资金，加快有线电视网络双向升级改造步伐，促进整个数字电视整体转换系统工程快速向前推进和发展。 通过本文的研究，对我国中小城市的有线电视网络双向改造提供一种具体的模式，切实可行地解决目前有线电视系统HFC 网络双向改造存在的问题。 关键词：有线电视网；双向HFC技术；EPON+EOC；EPON+LAN ABSTRACT At present, there are a great number of HFC networks in Cable TV network in China.Most of Cable TV networks in our small and medium-sized citie haven’t experienced two-way cable television network reconstruction. Such net works can neither conductingmultimedia interactive services nor achieves the management of network, business and users effectively, it only satisfies the basic requirements of the transmission of radio and televisionprograms. Especially as IPTV, Live television, mobile TV, Internet TV and some otherpopular media have sprung up, cable TV meets challenges for survival. As a result, it’s anurgent and imperative task to establish broadband two-way, stable and reliable comprehensive information network. This article take the Liyang City CATV Network Bidirectional Transformation as an example, a brief description of HFC network problems, introduces HFC Network Bidirectional Transformation of the basis, principle, analysis of the current domestic cable television bidirectional network transformation of three kinds of main technical scheme ( bidirectional HFC technology EPON+EOC EPON+LAN ). A choice of making full use of radio and television system of the existing rooms and cable resources as low cost, the unidirectional cable TV network transformation for interactive two-way network the way for two-way HFC. The final design of a community gives detail design