Research And Application On CDMA Network Optimization Technology

There are some unexpected reasons in network planning and construction, such as municipal construction leads to changes in the wireless environment, the development of mobile communication services causes a jump in the number of users and user behavior continuous changing and some uncertain factors, affect the quality of network operation. In order to make the network always running in top condition, and continuously improving network quality, it requires optimizing the network continuously at the existing network.The main purpose of network optimization is that identifying reasons of the impact of network quality or resource utilization rate is not high, through data collection and analysis for a putting into operation wireless network, then achieving the best running condition of the network through technical means or parameter adjustment, receiving the best benefits of the network resources, simultaneously finding out the network growth trend, providing the basis for the expansion.The gains of problems in the network need drive test, monitoring of network management system, user complaints and receiving signaling of port A through signaling instruments and so on, analyze the problems in network, further improve the system performance through parameter adjustment of the system basing on the analysis, provide the best quality of service at the existing system configuration, namely the best coverage, the satisfying signal strength, the best voice quality and the lowest call drop rates.Firstly, briefly describing the historical development of CDMA and the main features of CDMA technology, summarizing and analyzing the source of the data on CDMA network optimization. Then specific studying on CDMA network optimization technology, through controlling pilot pollution, reducing congestion, interference investigation, parameter optimization, PN planning, coverage optimization. Finally, analyzing in-depth and researching problems of dropped calls and paging success rate in the existing telecommunications network in Daqing, explaining the entire process of the problem analysis and treatment through specific case.For the dropped calls problem, analyzing the specific reasons through the chart receiving from the drive test software, such as interference causing dropped calls, coverage problems causing dropped calls, switching problem causing dropped calls and so on, then drafting specific solutions in connection with the specific cause of the problem, finally discussing the improvement of the optimized network quality by means of comparing the chart paper of road test data.For the low success rate of paging problem, by means of analyzing performance data through of the network management system, the reasons for positioning are parameters equipment problems and tommyrot of the LAC zoning dividing, and developing detailed reform proposals to specific issues, finally contrasting the improvement of the network after the rectification through performance data of network management.