下一代网络下一代网络(NGN)是可以提供包括话音、数据和多媒体等各种业务的综合开放的网络构架,它采用分层结构实现网络业务、呼叫控制和承载的分离。从业务层来看,下一代网络为传统电信网、移动通信网和Internet等网络提供统一的业务平台,通过各种网络技术的融合和协作,提供比 NGN Next Generation Network (NGN) is a comprehensive and open network architecture that can provide various services including voice, data and multimedia. It adopts hierarchical structure to separate network services, call control and bearer. From the business point of view, the next generation of networks for the traditional telecommunications networks, mobile communications networks and Internet networks provide a unified business platform, through a variety of network technology integration and collaboration, to provide more than