| Third-generation (3G) mobile communications is the main mobile communications direction.TD-SCDMA is Chinese independent intellectual property rights with the 3G communication standard. Planning and constructing the network of TD-SCDMA which is manageable, operational and repairable, is an important research topic.According to the statistics from NTT DoCoMo, the indoor traffic accounts for 70% of the total traffic.Therefore, the indoor coverage system is a very important part of the TD-SCDMA network.TD-SCDMA is working on 2GHz band, and compared with GSM800MHz, it would more easily form network blind area of coverage, which should be solved by the construction of indoor distribution system.This article introduced the design of TD-SCDMA indoor distribution system approach according to typical scenes such as exhibition centre and subway. Based on the discussion of indoor distribution system's far-reaching significance in TD-SCDMA indoor deep coverage, the paper has introduced the key technologies of TD-SCDMA and the feature of indoor distribution construction. With an in-depth study on wireless signal propagation of TD-SCDMA indoor system, it worked out the actual coverage power of single antenna. The paper has introduced several scenes of traffic model, the indoor propagation model, frequency planning, and cell assignment. Based on the research above, the paper discussed the TD-SCDMA indoor coverage on the aspects of the newly construction and transformation. Through the analysis, this article introduced the construction of TD-SCDMA exhibition centre and subway coverage system, including coverage planning and capacity planning. Finally the paper cited a few examples of typical scenes, such as Beijing New China International Exhibition Convention Centre and No.10 subway. |
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