Over the years, Carriers in China carried out a large-scale mobile communication network construction, size of network reached world leading level, the number of users continues to grow. After 3G licenses released, the construction of 3G network is the most important business to Carriers. How to construct the network by the most economical and most effective way ; How to build the most secure, most stable network; how to make the network transferred smoothly is the key point focused by the Carriers. Afer the 3G license releasing, the research of 3G and the softswitch sthetched out from the Lab. So the network planning is the most important to make the network secure.This article describes the function of soft switching, interface etc.; explained 3G technical standards, proposed by China Unicom's 2G, 3G network planning and coordinated development and the business strategy..Discussed the soft-switching in the WCDMA networking aspects of application. From the network deployment, the ability of evolution to IMS, the existing conditions etc. Discussed the choice of 3G core network softswitch version; put forward a variety of soft-switching networking program.From china operators in the present development , the cost-effectiveness, network stability, the soft-switching equipment, and the Networking Method of carrying capacity, we get three kinds of network disaster recovery programs.Also analyze and compare these three backup programs.
