【作者】 张奕；

【导师】 田红心； 刘群辉；

【作者基本信息】 西安电子科技大学 ， 电子与通信工程， 2007， 硕士

【摘要】 随着网络技术的发展普及,计算机网、电视网和通信网日益趋向融合。西安电信以ADSL和FTTX+LAN为代表的宽带接入业务,在其它宽带运营商的竞争下,发展前景受限。电信运营商需要开展新的增值业务来提升其宽带接入业务的盈利能力。电信的宽带接入与电视业务的融合—IPTV就是一种发展前景看好的新的增值业务。西安电信目前正积极开展IPTV实验,为IPTV商用打下基础。在本论文的研究过程中,作者主要做了以下工作:1.研究了IPTV系统的关键技术——组播技术,包括组播技术的发展、组播协议结构、组播成员管理、组播报文转发、域内组播路由和域间组播路由等。2.通过对比组播复制点的不同位置以及IP DSLAM、ATM DSLAM上的组播实现方案,并结合承载网的网络现状的IPTV的流量分析,提出了IPTV承载网的改造方案。3.通过对试验网的测试,对实验结果进行整理分析,总结试验网建设和可实施性经验及存在问题,提出了IPTV承载网一种远景规划,对将来IPTV的大规模商用和IP网的演进有一定的参考价值。更多还原

【Abstract】 With the developing and popularizing of network technology, computer network, television network and telecommunication network tending gradually. The broadband access business of Xi’an telecom, which takes ADSL and FTTX+LAN as representative, is restricted in developing a prospect under the business competition others. The telecom carriers need to improve the profitability of broadband access business though carrying out new value-added service. IPTV, which combining telecommunication broadband with TV business, is a new value-added service that has a fine prospection.Xi’an telecom does the IPTV experience for promoting the value of IP network and has a good base for IPTV commercial application. In the research tasks, the autheor does the following main work:1. Analyzing the main technique of IPTV system——multicast, which includes its development, protocol structure, member management, message repeat, intra-area route and extra-area route.2. Offersed the project of IPTV bearer network by comparing different position on multicast perform project of IP, DSLAM,ATM with current network and analyzing the IPTV network flux.3. According to the test of experimental network, the author analyzes the result of the experience and summarizes gain of the experimental network and finds some problems in it. Finally the author puts forward a kind of prospective layout for IPTV bearer network.All we do will provide good reference to the large-scale commercial application of IPTV bearer network and the evolution of IP network.更多还原