Thank you PIx and Ajay,
Pix,by 4/4/4 I mean there are totally 12 TRXs and 4 TRX per each cell so TRX 7&8 belong to second sector (cell) and yes by blocking the other 2 TRX in that cell(5&6) these 2 TRX took traffic!
May be there is really no traffic to take!! how can I find out this?
Thanks.