| The second generation mobile communication system of GSM uses time/frequency division multiple access wireless access mode, the wireless network planning basically can be divided into two steps。The first step in planning is no path loss prediction, the purpose is to make the network to ensure that the required business area of wireless coverage; the second step is based on business business volume estimation of frequency planning, in order to determine the capacity of the system.。Usually in the GSM system wireless planning, the main consideration is the voice service and a data service (for example SMS service), so that for a given number of channels, the capacity of the cell is a constant. Therefore, in GSM wireless coverage and capacity planning, planning can be independently and planning。Because WCDMA system is a self interference system, the capacity and coverage, interference between closely related, while the WCDMA system is a multi service, multirate systems, different business on system capacity occupancy is dynamic allocation process, WCDMA system network planning in capacity, coverage, different quality of service among the three best point, so the WCDMA network planning with narrowband frequency planning complexity will be greatly improved。 In the3G entered a period of rapid development, the network pre planning to the construction investment and the network quality is very important。This article in view of the network planning of coverage and capacity planning, analyzes the important parameters,considering the various interference effects, come in a variety of different environments and operations under the system coverage, and through theoretical analysis, calculate the capacity of the formula and the influence factors, and an analysis of the mixed business capacity changes, finally by using Monte-Carlo simulation method, combined with the actual case on the above analyses, so as to achieve more reliable objective planning。... |
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