This paper expounds the three levels of the integration of fixed network and mobile network, introduces the main functions of IMS (IP Multimedia Subsystem), compares IMS with soft switch, and researches the strategies and steps of the integration of China Telecom network base on IMS.

In future, the mixture of 3G and fixed network are also an inevitable trend.

IMOFN is a hybrid indexing structure which consists of a 2D R-tree built on road sectors for managing the fixed networks, a forest of 1D R-tree indexing the time interval for the past position of moving object, and a hash structure describing the current state of moving objects.

The application of the embedded TCP/IP protocol in network communication;

Analysis of the technique of network communication in telecommunication power supervision system;

Simulative research on substation automation network communication system;

Node importance evaluation based on communication network performance grads;

Study on the delay-non-determinism of communication network of digital substation;

A study of information requirements classification of power systemand needs to communication network;