| With the development of information technology, mobile communication systems have gone through the analog era to the development of the digital age. ITU is currently open standard third-generation mobile communication systems have the WCDMA standard, CDMA2000 and TD-SCDMA standard criteria. TD-SCDMA is China with independent intellectual property rights of third generation mobile communications standards, providing operators with a variety of operational capacity, to provide a broad market space and a solid technology platform, but also because of China's technological level is poor, the network construction and optimization, there are still some shortcomings.In this paper, take the W city of TD-SCDMA network construction for example, Firstly, divided the W City into dense urban areas, usually urban, suburban and rural four regions and four regions were analyzed for TD-SCDMA network needs; then, according to regional demand for TD-SCDMA network is different for various regions of the network planning, in the pre-planning must be used for network planning simulation software to simulate and analyze the simulation results, and after analyzing the results to adjust the network planning, the city early in the W network planning simulation process, and generally found in dense urban areas covered by the more urban existence of the problem, so that these areas will receive more signal strength to reach or exceed the requirements of the downlink pilot signal, making UE within the district in frequent switching between these signals, leading to UE in the downlink channel time slot is there to accept the level failures, and broad network coverage and quality can meet the needs of users W City, for which, during the simple near the cell reselection and cell load balancing after the W City TD-SCDMA network construction; simulation network planning process to identify possible problems, but can not guarantee to solve all the problems which, although the simulation results show that planning program to better meet the W City regional wireless data transmission, but the simulation can only react to some extent the merits of the program, in practice, due to high-rise near the base station, radio sources and the terrain and other factors, making the actual construction of the wireless network will be there are some flaws, for the construction of a wireless network late, but also based on the actual situation, the construction of wireless network optimization. To this end, the network construction is complete, this according to the W City TD-SCDMA network implementation of the specific field testing, test results show that the W over the city there are still some areas with weak coverage covers issues such as network coverage, and out if the quality of and access failures, for which, in the optimization process in accordance with the testing process in the specific situation of the corresponding optimization problem, with a view to achieve the best wireless networking effect. |
