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当前,通信业的发展面临着移动业务对固定业务的替代加速、数据业务增量不增收、IP业务对传统电信商务模式形成冲击等诸多问题的困扰,要求电信网进行全面的技术转型。这种技术转型成为发展下一代网(NGN)的重要驱动力量。分析下一代网络的基本特点,探讨NGN主要技术方向以及交换网、传输网、接入网、移动通信网、互联网向NGN的演进策略。
At present, the development of the telecommunications industry faces many problems such as the accelerated replacement of fixed services by mobile services, the increase of incremental data services, the impact of IP services on the traditional telecom business model and the like, and requires the telecommunications network to conduct a comprehensive technological transformation. This technological transformation has become an important driving force in the development of Next Generation Networks (NGNs). Analyze the basic characteristics of the next generation of networks, explore the main technical directions of NGN and the evolution strategies of switching networks, transport networks, access networks, mobile communication networks and the Internet to NGN.