Simulation Analysis Of A Wcdma Radio Network Planning In A Number Of Engineering Problems

Being one of 3G standard, WCDMA has great different technical specialty from GSM., so principle and method of WCDMA radio network planning have changed. The self-interferenc, soft coverage, soft capacity of WCDMA system are deeply define the Complexity and synthetecallity of WCDMA network planning. This demand that the network planning engineers has to all-around analyse the technical details of planning by usage of network planner. Hence, success of network planning can be attached.WCDMA radio network planning can be divided into three phases: pre-planning, detailed planning and optimization. Detailed planning includes network configuration planning, coverage prediction, capacity analyse and so on. Together these three phases also are called topology planning. Topology planning intends to define the final network topology. The performance of a WCDMA network is highly dependent on the interference level in the system, controlling this interference is vital. Hence, interference controlling bring the three phases together tightly. Process of detailed planning is to find out the balance of network configuration and coverage and capacity in order to effectively control interference in reasonable situation.System simulation plays an important role in network detailed planning, and run through the process of network configuration, coverage prediction and capacity analyse. Only has WCDMA radio network planning simulated repeatedly, which can finally get definitions of network topology in order to meet the network requirment.This thesis points to the network topology planning phase of system simulation, analyzed the influence of base station site selection and antenna configuration on the performance of WCDMA network. Then based on this analysis, related to practical problems, we discussed of feasibility of community of base station site of GSM and WCDMA, and selection of antenna horizontal beam width, and comparation of mechanical and electrical antenna downtilt, and the effect of antenna direction error. We hope that these study work can use for reference and guidance in sight of the WCDMA radio network planning.