GSM Frequency Planning

Frequency planning is one of the several most important factors which influence the wireless network quality. The frequency planning strongly affect the capacity, quality voice and reduce neighboring interference.
General Form Frequency Planning such as: 4x3, 3x3, 2x6, 1x3, 1x1 for using in the present. Each form depends on the quantity of users.
Revise last calculation in GSM Network Coverage Planning II, we got number of Base Station 59BS 
Please see GSM Frequency 
For example: we have frequency bandwidth 10MHz (ARFNC: 45-94) and form 4x3
4 is Base Station number and 3 is Cell number of Base Station.
We use 4x3 model Reuse frequency.
We suppose:
- BCCH from 81-94 (14 channels)
- TCH from 45-80 (36 channels)
- Channel 81 and 82 is reserved channel of BCCH for micro cell BTS (indoor planning).
Table Frequency Reuse (4x3)

From above table 4x3 = 12 Cells so once cluster for frequency group A{A1,A2,A3}, B{B1,B2,B3}, C{C1,C2,C3} and D{D1,D2,D3}.
Base on above table: one Base Station Cell A1 Channel 94 is BCCH and channel 80, 68 and 56 are TCH so max configuration for one BTS S(4/4/4).

Table Frequency Reuse (3x3)
 

  Max configuration per BTS S(5/5/5)