A telecommunication system includes one or more radio access network controllers and one or more radio base stations. A radio access network controller supervises the operation of a radio base station. To facilitate the supervision process, the radio access network controller receives a measurement capacity report from the radio base station and determines measurement control parameters specifying reporting requirements of the radio base station. The measurement control parameters are continually adjusted so that the capacity of the radio base station is not exceeded. Also, the capacity of the radio network controller is also considered in determining the measurement control parameters.