| Nowadays,as the standard of the third generation mobile communication system proposed by China, TD-SCDMA system has been commercially available and could provide users with various data services.The statistics has shown that, most of the mobile communication occurs in indoor low-speed environments.However, the signal quality for indoor user is not very well, which would reduce the users'quality of service.To improve the coverage, Home NodeB(HNB) has been proposed into 3G system to provide indoor high-speed wireless accessing service.HNB can expand the coverage of 3G system, reduce the blind coverage, and lighten the load of macrocell greatly. However, new interference for macrocell will emerge because of the deployment of HNB.And the interference may affect the performance of existing network.In this paper, the interference of macrocell caused by HNB has been analyzed firstly. Based on the HNB interference models and the different deployment scenarios,different interference situations have been researched. Meanwhile, based on Monte Carlo static simulation method, a simulation platform has been set up to analyze the interference problem. This platform includes macrocell system and HNB.The simulation focuses on the interference scenarios caused by HNB deployment in different locations, densities and transmitting power. Finally, based on the simulation results, some valuable advices about HNB deployment have also been proposed. |
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