Methods and apparatus are disclosed for scheduling a narrowband uplink transmission from a wireless station to a wireless access point in response to a station-specific wideband downlink transmission from the access point to the station. A station-specific downlink frame includes a station identifier associated with the station, and further includes resource allocation information associated with an uplink transmission channel over which the station is to transmit an uplink frame. The station-specific downlink frame is transmitted from the access point to the station over a downlink transmission channel having an associated downlink bandwidth. Based on the resource allocation information, the access point receives the uplink frame from the station over the uplink transmission channel. The uplink transmission channel has an associated uplink bandwidth that is narrower than the downlink bandwidth of the downlink transmission channel. In some disclosed examples, the uplink transmission channel is a sub-channel of the downlink transmission channel.