省级数字电视组播网络的设计与维护

Design and Maintenance of Provincial Digital TV Multicast Network

论述各级广电运营商的网络核心部分,对于省级广电网络而言,其核心区域是省至市之间的互联区域,这是广电运营商主营业务的分发与运行枢纽。总结了辽宁省有线数字电视核心网的建设与维护经验,以广电总局62号令的要求作为设计依据,提出了指定信源组播才是适合广电运营商的网络模型。论证了组播网络易于采取的安全策略,包括UDP过滤、单向静态路由、边界隔离等技术,并提出需要重视网管交换机的观点。

This paper discusses the network core part of radio and television operators.For the network at the provincial level,its core area is the area between the provinces and cities,which is the main business hub of radio and television operators.This paper summarizes the construction and maintenance experience of the core digital cable TV network in Liaoning province.Based on conforming to the requirements of the administration＇s decree 62,the article puts forward that the network model is suitable for broadcast TV operators and proves the practicability of the security strategies which can be easily adopted by the multicast network system,including UDP filtering,one-way static routing,border isolation,and other technologies,and puts forward the need to attach importance to management switch.