Research Of WCDMA Network Planning

As an important part of the third generation mobile communication technology, the network planning and network optimization of WCDMA study is very important.This paper mainly studies the WCDMA network planning.Firstly reviewed the WCDMA network planning, including WCDMA network planning and GSM network planning, the difference of network planning WCDMA technology, system analysis and isolation interference between requirements, including WCDMA and GSM/CDMA2000/td-scdma system of interference, the days between the choice of system, feed base construction and the location of the optimization principle, planning and methods, including link budget, cover and capacity planning, site survey, introduces the WCDMA network planning;work flow, planning software etc.Foucs on the WCDMA network simulation and analysis of one city. At first, choose the latest Digital Terrain Map (DTM) of the city, Divided the whole city into serval distribution planning area based on city construction layout, population distribution. WCDMA sites planning According to the existing GSM network sites. Capacity simulation based on the link budget calculation for the simulation area. Compare with the sites number between the capacity simulation and the existing GSM network sites,we can get the new sites number. The new sites should be builded in the coverage poor area from the coverage simulation. To insure the accuracy of coverage prediction, the propagation model tuning is very important. The subscriber of Simulation according to the accuracy of the crucial for GSM users and traffic model analysis, using special tools for WCDMA subscriber forecast. Finally using special planning software NetAct WCDMA network planning, and according to the simulation results, the user base station layout adjusting adjustment, distribution density finally achieved the perfect simulation results. Analysis the results based on the simulation.AMR12.2K including the RSCP, EC/IO, the pollution, its business covers, soft handoff analysis, uplink capacity analysis. These services directly related to the prediction results after completion of the network, the network quality is an important basis for the optimization in good simulation results are network quality guarantee.finally summarized the WCDMA network planning of all process and key points.The WCDMA network planning is a complicated process, this paper comprehensively the content may not be late, including network of research work after the completion of the real network stations, subscribers, traffic into NetAct, again, adjust, simulation, optimization network construction provides important support.