一种“三网合一”实现方案

A realizing scheme for unified network

在分析 CATV、计算机、电信三网的特点和互连存在问题的基础上 ,提出了基于 HFC的三网合一实现方案 ,该方案能将 CATV、电信和计算机三网融合在一起 ,以实现语音、视频、数据等多媒体信息的综合传输 .详细介绍了三网合一的网络结构、系统功能业务和频谱分配 .系统的网络结构主要由路由器、交换机、前端单元(HEU )和远端接口单元 (RIU )组成 ;功能业务主要包括模拟专线业务、ISDN业务、高速 Internet和数据信息服务业务、多媒体信息服务和视频点播业务、视频会议和可视电话业以及遥测服务 ;频谱分配为三段 ,即 0～ 5 0 MHz,5 0～ 5 5 0 MHz和5 5 0～ 75 0 MHz.

After analyzing the characteristic of CATV,computer,telecom network and the problem of their internetworking,a realizing scheme for unified network on the base of HFC is proposed in this paper.The CATV,computer,telecom networks can be integrated in order to transmit multimedia information such as voice,video,image and data within one network.It also introduced the network structure which consists of router,switch,HEU and RIU,service provisions such as ISDN, Internet information,VOD,video meeting and telemetering,spectrum allocation for HFC which can be divided into three parts,that is,0~50,50~550 and 550~750 MHz.