【摘要】 本文阐述了下一代公用通信网络的基本结构和核心网络演进的几种主要技术方案 ,着重分析了我国核心网络的发展步骤。更多还原

【Abstract】 The article describes the basic structure of next generation public telecommunication network and several solutions for evolution of core network. Development steps of core network in china are also presented.更多还原