Frequency planning is a very important part of GSM radio network

it will directly affect the capacity and quality of radio communications services.In frequency planning

the planning of the frequency reuse and utilization also depends on the quality of site planning.A good site planning can make the maximum effect of frequency reuse

raise the overall resource utilization rate of frequency

increase network capac- ity and guarantee the quality of the network.We must consider the characteristics of BCCH and TCH in frequency reuse

planning a different mode of frequency reuse.The mode of frequency reuse depends on the amount of frequency resources and the design of largest configuration of base station

the largest configuration of base station also depends on the frequency reuse model of network

they are closely related.