The present invention refers to an apparatus for controlling data traffic in a cell of a cellular network wherein the apparatus comprises means for determining the data rate of an ongoing data session established between a first client device located in a cell and a network device wherein said data session is used for receiving streaming data, means for determining the data rate of an ongoing data session established between a second client device located in the same cell and a network device wherein said data session is used for receiving non streaming data, means for determining a Quality of Experience of the data stream of the first client device and means for adjusting the data rate of the first and/or second client device if the determined Quality of Experience of said data stream of the first client device is lower than a predetermined threshold.