随着网络通信技术的发展，传统的网络通信技术在网络和通信技术的发展中不断发展。

Following the development of network and communication technology, traditional telecommunication network meets with great challenges currently. In order to overcome the disadvantages of traditional telecom network, next generation network was put forward in recent years, which bases on IP packet network and soft-switch technology is used. The same problem is also existed in power communication system, so how to build next generation communication system become more and more important.