Jinzhong Mobile Communications Corporation GSM/TD-SCDMA Indoor Distributed System Design And Optimization

This article describes the design and construction of TD-SCDMA network indoor distribution system engineering in Jinzhong Mobile Communications Corporation, analyses the current situation of GSM network indoor distribution system, and gives a brief description of the GSM and TD-SCDMA network standard which are carried within the indoor distribution system.According to the design flow of indoor distribution system, the paper makes a deeply study of prior preparation, program planning, site survey, simulation tests. In particular, the program planning is carried a detailed study. The paper accounts for signal source capacity on the basis of covering domain features, such as the scene structure, the user composition, the number of users and so on, takes frequency planning and region division according to size and characteristics. In the distribution system design, first setting the antenna port power, accounting distribution system power, and determining the number of RRU needs. The switch sub regional between indoor distribution system and wireless signal transmission base station has to be planed, taking strict control of the indoor distribution system power in accordance with the "multi-antenna, low-power" principle, preventing signal leakage under the premise of assuring the covering level. The guiding principle is proposed to engineering construction after designing.The device of indoor distribution system have to be selected supportting TD-SCDMA network band. Feeder lines, couplers and antenna selection should be the focus of attention in rebuilding or building of indoor distribution system. The appropriate signal way is determined by the design of source signal. Finally, equipment and cable of TD-SCDMA indoor distribution system should be strict in installation work.Optimization design of indoor distribution system is taken in accordance with different domain such as hotel, residential area and commercial building. The selection of antenna, location of antenna installation, domain switching, the control of signal revealing are researched in the light of different domain, in accordance with needs and characteristics of wireless network usageFinally, the feasibility and design result of optimization proposal are fully proved by three different conditions.