| With the rapid development of triple-play business, three major communications operators to carry out all operations, the face of China Unicom, China Mobile and China Radio and Television of the competitive pressure,China Telecom to open up new business is undoubtedly determine whether the tight encirclement and weight for final victory, of which the exploration and development of IPTV business in the future development of China Telecom's broadband market will play a key role.To ensure business quality IPTV, IPTV is undoubtedly on the IP bearer network made high demands. This paper focuses on the IPTV network key when the broadband access network technology. Paper first outlines the current mainstream broadband access technology ADSL/ADSL2+, Fibre+LAN, as well as the emerging fiber access networks Technology FTTX, then discusses the IPTV platform, system architecture, allowing the reader a macro level IPTV service on the understanding, IPTV services and through analysis of the bandwidth, multicast, QOS of the bearer network such as the requirements of IPTV services proposed to guarantee the quality of three different technical solutions for network access (ADSL2+, Fibre+LAN, EPON), and finally it build a variety of Network access test environment, the environment test IPTV quality of service. Through analysis and comparison of various parameters and network Status of Xian, it identified the best IPTV network access technology at this stage. It is EPON.Then, I have the application of theory in practice, By analyzing the causes of IPTV in Xi'an, it provide an effective and realistic solutions to the access network side.Finally, the article puts forward the construction and reform ideas of IPTV access network. Finally, the conclusion put forward the idea of IPTV access network construction and transformation in the future and the next step is to research. |
