| The cable TV network in our country after20years of construction and development,from analog TV to digital TV, cable TV network has been playing a medium importantnational information infrastructure and information transmission. With the development ofinformation technology, network convergence has entered a substantive stage of development.Although, in the overall digital television conversion work in recent years, the number of usershas improved, but facing the popularization and development of the new business operators,especially the wide spread of IPTV crazy paving, network video terminal, families are facedwith diverse audience choice, for reasons that are not convenient, space is limited, the contentthe lack of such, users on the way of watching TV is gradually lost interest, one-way broadcastconventional cable has been unable to meet the diversified needs of people growing,transmission technology of radio and television of one-way access network can not meet theinteractive TV, data, voice, VPN and other business needs, and Telecom IPTV because ofadvanced technology, access flexible package, low, the impact on the traditional TV business.Therefore, in the "triple play" background, raise technical level, enhance network efficiency,improve the competitiveness of the model has become the radio and television networkscontinue to survive, the key to the development, therefore, as soon as possible full two-way,interconnection, broadband and reliable network platform, actively promote the ability ofnetwork load is a pressing matter of the moment.Cable-way network is to provide users with comprehensive business bidirectionaltransmission system, interactive services. The two-way network transformation techniquemain types CMTS+Cable modem (CMTS: Cable modem Termination Systems), EPON+EOC (Ethernet over COAX Ethernet data over coaxial cable), EPON+LAN, FTTB+LAN,etc., and this thesis, Guangdong Province around the city adopted the access networkbidirectional transformation technique: CMTS+CM and EPON+EOCFirst, two-way cable television expounded the basic principle of access networks and thenext generation of broadcast television network development ideas, clarify ideas for futurenetwork development specified direction;Secondly, CMTS+CM and EPON+EOC two kinds of network transformationtechnology technical principles, standards, networking applications for analysis; thus inpractical applications concern projects (network investment costs, bandwidth, anti-jammingcapability, system security, and system network), combined with the access rate of the idealmodel of the two techniques for analysis and comparison of network transformation clear CMTS+CM technology advantages.Finally, with the Guangdong Shanwei network transformation of the actual situation, putforward two-way network reform implementation. Such as cities and counties to providebranch network transformation guidance. |
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