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Bảo hiểm yêu cầu xác suất cho 8 kbps, 64 kbps và 384 kbps dịch vụ của nhà điều hành đã được thiết lập, tương ứng 95%, 80% và 50%, hoặc tốt hơn. Giai đoạn lập kế hoạch bắt đầu với đài phát thanh dự toán ngân sách liên kết và lựa chọn vị trí trang web. | Radio Network Planning 211 Figure 8.18. The network scenario. The area measures 12 X 12 km2 and is covered with 19 sites each with three sectors The operator s coverage probability requirement for the 8 kbps 64 kbps and 384 kbps services was set respectively to 95 80 and 50 or better. The planning phase started with radio link budget estimation and site location selections. In the next planning step the dominance areas for each cell were optimised. In this context the dominance is related only to the propagation conditions. Antenna tilting bearing and site locations can be tuned to achieve clear dominance areas for the cells. Dominance area optimisation is crucial for interference and soft handover area and soft handover probability control. The improved soft softer handover and interference performance is automatically seen in the improved network capacity. The plan consists of 19 three-sectored macro sites and the average site area is 7.6 km2. In the city area the uplink loading limitation was set to 75 corresponding to a 6 dB noise rise. In case the loading was exceeded the necessary number of mobile stations was randomly set to outage or moved to another carrier from the highly loaded cells. Table 8.15 shows the user distribution in the simulations and the other simulation parameters are listed in Table 8.16. In all three simulation cases the cell throughput in kbps and the coverage probability for each service were of interest. Furthermore the soft handover probability and loading results were collected. Tables 8.17 and 8.18 show the simulation results for cell throughput 212 WCDMA for UMTS Table 8.15. The user distribution Service in kbps Users per service 8 1735 64 250 384 15 Table 8.16. Parameters used in the simulator Uplink loading limit 75 Base station maximum transmission power 20 W 43 dBm Mobile station maximum transmission power 300 mW 25 dBm Mobile station power control dynamic range 70 dB Slow log-normal fading correlation between base stations 50 .
