A method is provided for congestion control in a network node (114; 510; 900) of a communication network. The network node handles a plurality of data connections for conveying data packets travelling between a core side and a terminal side of the communication network. The method is performed in the network node and comprises detecting (210) a condition indicative of a congestion for any of the data connections, selecting (220), among the data connections, a data connection (RABdrop) for which a bit-rate reduction is to be caused, and determining (230) a number (Xi) of data packets to be discarded for the selected data connection. The determined number depends on a time-integrated difference between experienced and targeted bit-rates for the selected data connection. Then, the reduction of the bit-rate is initiated (240) for the selected data connection by causing discarding of the determined number of data packets.