The Research Of Network Optimization For TD-SCDMA Drive Test System

With the development of the industry of mobile communications and the ever-increasing competition, the quality of the network is the key to the success of network operators. TD-SCDMA is one of the criteria of the third generation of mobile communication technology about which we have our own intellectual property rights. For the future TD-SCDMA network operators, their major concern is how to build a TD-SCDMA network efficiently and how to optimize the network in order to ensure high performance at low cost. Consequently, the network planning and optimization of TD-SCDMA becomes more and more important.As the typical example of the tools of network optimization, drive test is one fundamental and very important method in network planning and optimization. Based on the theory of TD-SCDMA system and the technology of drive test, this thesis designs and realizes the model of diagnosis analysis in AirWisdom drive test system, which helps to analyze the problems and guides the specific examples of network optimization. The thesis mainly focuses on the research of network optimization in drive test model.After the brief introduction of the third generation of mobile communication system and the key characteristics of TD-SCDMA system, the thesis points out the importance and necessity of TD-SCDMA network optimization and the challenges we are facing now and puts forward that drive test could be used in network optimization at the beginning stage of TD-SCDMA planning. Then the thesis analyzes the methods, contents, procedures and general principles of drive test in network optimization and points out some common problems in drive test. To solve the current problems in TD-SCDMA network optimization efficiently, the thesis designs and realizes the models of pilot pollution, over coverage and neighbor cell optimization for diagnosis analysis in AirWisdom drive test system. The thesis elaborates the procedures, designing proposals and realizing methods of the diagnosis analysis. Subsequently from the specific case study of network optimization, it can be seen that the system designed in this thesis could detect the problems such as pilot pollution, over coverage, drop call and neighbor cell missing, analyze the causes and their effects on the network, and provide solutions to these problems. From the final results we can see that these solutions can guide the network optimization engineer to locate and solve network problems very quickly and help to improve the quality of the network.