在面对NGN时,电信是非常迷惑和痛苦的当前,全球电信业处于重大的变革期,以无所不在、无所不能为特征的下一代U网络成为全球性的研究热点。电信网、互联网、广电网;固定网、移动网、无线接入网等各个层面的网络融合正在不断加快和走向深入,用户需求 In the face of NGN, telecommunications is very confusing and painful At present, the global telecommunications industry is in a period of major changes, with ubiquitous, omnipotent features of the next generation of U networks become a global research hotspot. Telecommunications networks, the Internet, broadcasting network; fixed network, mobile network, wireless access networks and other aspects of network convergence is accelerating and deepening, user needs