Method for controlling traffic over an interface between a base station and a radio network controller of a radiocommunication system, the base station being arranged for receiving information from terminals over radio channels and for forwarding said information to the radio network controller over said interface through at least one buffer having a limited size. According to the method, a level of traffic on said interface is estimated and the quantity of information forwarded to the radio network controller over said interface is varied according to the traffic level estimate.