Aspects of the disclosure provide a control apparatus that includes transceiver circuitry and processing circuitry. The transceiver circuitry is configured to transmit/receive signals from a plurality of terminal devices using a shared channel. The processing circuitry is configured to determine distances to the plurality of terminal devices, allocate resource elements in the shared channel according to the distances, and communicate, via the transceiver circuitry, with the plurality of terminal devices according to the allocation of the resource elements in the shared channel.