Limited uplink bandwidth radio network devices (30) are supported on wide bandwidth uplink carriers by configuring and controlling the use of multiple control regions within the uplink carrier bandwidth. In some embodiments, the total bandwidth of the uplink carrier is divided into a plurality of sub-band portions, wherein at least one sub-band portion includes at least one control region nominally dedicated to the transmission of uplink control signaling. The control regions may be configured at one or both edges of sub-band portions, or elsewhere within a sub-band portions. Sub-band portions may share a control region. Radio network devices (30) are configured with a specified portion of the uplink carrier bandwidth for use for uplink transmission, which includes at least one control region. The specified portion may comprise an integer number of sub-band portions, or may span only part of one or more sub-band portions. Radio network devices (30) may be dynamically configured to allow or suppress data signaling in control regions.