A method of controlling radio transmission in a cellular network, the method comprising: a node of the cellular network sending an uplink grant (203; 701; 803) to a communication device, the uplink grant (203; 701; 803) indicating uplink radio resources allocated to the communication device in re-occurring time intervals; for each of said time intervals, detecting by the node if there is a signal on the indicated uplink radio resources, and in response to the detection, selecting by the node, between: - an active mode, wherein the node selects the active mode when the node detects that the communication device performed an uplink transmission in the allocated uplink radio resources, wherein the node in the active mode, receives an uplink transmission including uplink data and provides a hybrid automatic repeat request, HARQ, feedback accompanied with a dynamic uplink grant, and wherein during the transmission of the dynamic uplink grant, the node performs a link adaptation of a radio link between the node and the communication device, by selecting a modulation and coding scheme and a transmission power, and - an inactive mode, wherein the node selects the inactive mode when the node detects that the communication device performed no uplink transmission in the allocated uplink radio resources, wherein in the inactive mode, the node refrains from providing the HARQ feedback; and in response to detecting a need for an uplink retransmission by a further communication device in at least a part of the allocated uplink radio resources in one of said time intervals, the node sending control information to the communication device, said control information temporarily disabling utilization of at least said part of the allocated uplink radio resources in at least said one of the time intervals by the communication device. for each of said time intervals, detecting by the node if there is a signal on the indicated uplink radio resources, and in response to the detection, selecting by the node, between: - an active mode, wherein the node selects the active mode when the node detects that the communication device performed an uplink transmission in the allocated uplink radio resources, wherein the node in the active mode, receives an uplink transmission including uplink data and provides a hybrid automatic repeat request, HARQ, feedback accompanied with a dynamic uplink grant, and wherein during the transmission of the dynamic uplink grant, the node performs a link adaptation of a radio link between the node and the communication device, by selecting a modulation and coding scheme and a transmission power, and - an inactive mode, wherein the node selects the inactive mode when the node detects that the communication device performed no uplink transmission in the allocated uplink radio resources, wherein in the inactive mode, the node refrains from providing the HARQ feedback; and - an active mode, wherein the node selects the active mode when the node detects that the communication device performed an uplink transmission in the allocated uplink radio resources, wherein the node in the active mode, receives an uplink transmission including uplink data and provides a hybrid automatic repeat request, HARQ, feedback accompanied with a dynamic uplink grant, and wherein during the transmission of the dynamic uplink grant, the node performs a link adaptation of a radio link between the node and the communication device, by selecting a modulation and coding scheme and a transmission power, and - an inactive mode, wherein the node selects the inactive mode when the node detects that the communication device performed no uplink transmission in the allocated uplink radio resources, wherein in the inactive mode, the node refrains from providing the HARQ feedback; and in response to detecting a need for an uplink retransmission by a further communication device in at least a part of the allocated uplink radio resources in one of said time intervals, the node sending control information to the communication device, said control information temporarily disabling utilization of at least said part of the allocated uplink radio resources in at least said one of the time intervals by the communication device.