There is provided a method of calculating a maximum allowed transmit power for a user equipment within a cellular network system. The cellular network system includes a first cell having a first base station and a second cell having a second base station. The user equipment is served by the first base station. The method includes determining, by the first base station, a maximum degree of interferences being tolerable by the first base station, wherein the interferences are caused by the user equipment following a handover of the user equipment from the first base station to the second base station, and calculating a maximum allowed transmit power for the user equipment to be used following the handover based on the determined maximum degree of interferences.