住宅小区双向HFC系统的组网与设计

简述数字电视功能,用框图呈现有线电视承载网的总体架构,并对其中的主流技术EPON(以太无源光网络)的网络构成作了解释;介绍了三种双向HFC(混合光纤同轴电缆网)接入方案,即CMTS(有线调制解调器终端系统)方案、EPON 无源EoC(基于同轴的以太网)方案、EPON LAN(局域网)方案;对三种方案的工作原理、组网特性、适用范围以及各自的优劣势作了一些分析;结合市场应用得出结论:EPON LAN是新建小区双向HFC网络的最佳解决方案,并绘出了该方案的简要系统框图。

Network Configuration and Design of Bidirectional HFC System in Residential District

In this paper,the functions of digital television are briefly described. The ensemble frame of cable TV load-carrying network is presented in block diagram and the network configuration of the mainstream technology EPON(Ethernet over Passive Optical Network)in the system is explained. Three kinds of HFC(Hybrid Fiber-coaxial Cable)access schemes have been introduced,which are CMTS(Cabled Modem Terminal System)scheme,EPON passive EoC(Ethernet over Coax)scheme and EPON LAN (Local Area Network)scheme. The operating principles,network configuration features,application scope,the merits and faults for three kinds of schemes have been partially analyzed. The conclusion is drawn by combining with the market application: EPON LAN is the optimum solution for bidirectional HFC network in the newly-built residential district. And the concise block diagram of the system has been plotted.