Hi Vladimir,
Common BCCH is not activated/Deactivated in the BSC. It will be available in the BSC if the licensed were bought by the operator. Common BCCH control is activated on the cell by creating/configuring TRXs of different bands as separate BTS objects in a cell, adding another object in the network which is the segment. As for statistics, this can be taken on segment or bts level.
rgds.