In a radio communication system comprising a primary station (100) and a secondary station (110), the primary station is able to employ one of a plurality of transmission schemes for transmissions to the secondary station. The secondary station determines a quality parameter relating to a downlink channel (122) and from this parameter determines a measurement report to signal to the primary station. The measurement report indicates a suitable transmission power for one transmission scheme, and the primary station is able to determine from a plurality of power offsets between transmission schemes respective transmission powers for a plurality of transmission schemes. The power offsets may be signalled to the primary station by the secondary station. Such a scheme provides sufficient flexibility to handle a wide range of receiver capabilities without the need for excessive signalling.