软交换技术在下一代网络演进中的应用

软交换是支持现有网络向下一代网络(NGN)过渡的核心技术，它以业务控制与网络控制相分离、呼叫控制与承载控制相分离的思想为基础，提出了一种以分组网为平台向任何网络用户提供统一业务接口的实现途径。首先介绍了软交换技术的引入、软交换网络的构成，然后讨论了软交换所涉及到的关键技术，最后介绍了软交换技术在向NGN平滑演进中的应用。

The Application of Softswitch Technology in the Transition into NGN

Softswitch is the core technique for supporting the transition of the existing networks into next generation network(NGN) smoothly. It is based on the idea that the service control separates from the network management, and the call control from the bearer. Thereby, one kind of method is given to provide universal service interfaces by the packet network for all network users. Firstly, this paper gives the introduction and the network structure of softswitch. Then the key technologies of softswitch are talked over in detail. At last, the paper describes the use of softswitch technique in smooth moving into NGN briefly.