Research On WCDMA And GSM Radio Common Network

The GSM network has already been reaching higher coverage rates after developing and building for many years afterwards. At the beginning of the 3G construction, it is hard to achieve the continuous coverage and the same coverage as the 2G network in the covering area. That WCDMA/GSM systems forms a network through the Inter operation, realizes roaming and the service intercommunication between the two systems, we must bring into full play the advantages of WCDMA in the new service development and must fully utilize the existing GSM network.This paper mainly research on the WCDMA/GSM Inter operation technology analysis, the implementation strategy, the performance optimization and the test in view of the wireless access network; the Inter operation technology and the main points of the GSM BSS system reforms is introduced; According to the principle of the Inter operation , make a concrete analysis of dual mode cell phone to stay tactics of staying, the network choose tactics under the idle mode, link operational mode switch / re-election strategy, load balancing strategy and the project of the videophone fall after rise between the systems; Analysis of the performance of Inter operation, discussing the parameter optimization and time delay separately; the method of setting the neighboring area between the WCDMA and GSM systems is studied; the suggestion of optimization the Inter operation performance and neighboring area configuration is given. Finally, a detailed requirements and analysis for GSM equipment upgrading is done, the Statistics of China Unicom GSM BSS equipment existing versions and the versions to meet the Inter operation requirements are done, and the strategy of the users upgrading from 2G to 3G , the differences between SIM and USIM cards ,and the restriction project of 2G users roaming are introduced.