A base station (2a,2b,2c) which can communicate with radio terminals on common and dedicated channels according to specific speeds, is provided with a band-pass which is available according to the use of the common and dedicated channels in order to receive data from a radio terminal on a high-speed uplink channel. An available band-pass is determined in the base station in order to receive the data from at least one radio terminal (1) on at least one high-speed dedicated uplink channel. A first indication relating to the available band-pass is subsequently transmitted on a common downlink channel. At least one second indication relating to a percentage of the available band-pass which should not be exceeded by the radio terminal during a forthcoming transmission on said high-speed dedicated uplink channel is then transmitted independently for each radio terminal.