| As the China Unicom CDMA network transferred to China Telecom took over the operation of China Telecom CDMA base stations to the existing building, expansion, upgrading, reconstruction has fully started. China Telecom's CDMA network construction on the pace from the start the following areas:New large outdoor base stations; increase network optimization efforts; a positive solution to the problem of insufficient coverage of rural areas; use of existing fixed-line resources, increase the intensity of indoor coverage.With the Telecom took over the CDMA network, with existing PHS, wireless broadband WLAN,800 MB digital trunking and 3G reserve point networks, wireless communications, telecom network capacity and network coverage than the original scale has been significantly enhanced. Embarking on the network, while a large-scale construction projects, telecommunications networks are also attached great importance to the quality of the early stage of forecasting. In 2008 before taking over the network, Telecom has organized relevant departments of the whole network for large-scale DT (Drive Test, driving test) test, followed again by a telecommunications network to the network organized by the Center to conduct a comprehensive road test. The purpose of these efforts are committed to the network construction, look for problems in the existing network and the accumulation of relevant experience, to provide a basis for further work and recommendations.In this context, this article primarily through dense urban areas in Shanghai characteristics of 3G radio network coverage analysis and research, as well as CDMA2000 1x and EV-DO standard in the two kinds of link budget differences between periods, and proposes use of the existing 2G network coverage under the DT drive test data, through specific algorithms for future 3G wireless networks to predict coverage.Dense urban area of Shanghai through the organization of large-scale DT tests on existing 2G networks, the wireless environment, making blanket geographical research thoroughly, and can be targeted at different population and building density in urban areas to conduct research tests, and in the light on-site road test data, using GIS (Geographic Information System, Geographic Information System) software provides user system MapInfo and MapBasic development tools for programming, forming dense urban areas covered by 3G wireless network forecasting process, and then use the program, combined with on-site road test the measured data, calculated from data by MapInfo software, function, accuracy under various sampling data calculation and analysis, to determine the dense urban areas like Shanghai in the case of wireless networks, using 10 meters and 6 related to the accuracy of base stations data analysis, it is the premise of guaranteeing the quality of the conclusions of the highest efficiency, so that forecasting methods using computer-aided tools will be transformed into the process and presents the results of cost-effective.. And, ultimately, in conjunction with the program and its data, you can MapInfo software systems, the visual display of DT test results and the existing 2G networks and their base stations in the geographical environment problems, for the existing networks and base stations in less than, and wireless network and its base stations in the city within a dense urban areas the special nature of the future 3G network planning and the distribution of base stations provide a strong basis for planning and construction.As a software application class papers, the main results of this paper include the analysis of the status quo CDMA wireless networks, CDMA business prediction analysis, CDMA wireless network coverage analysis. I am in this project is mainly responsible for on-site road test, auxiliary program production and network planning of the work, the use of the entire project to the major software tools:MapInfo. MapBasic. |
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