A user equipment device - UE -, comprising: at least one antenna (335, 336, 337, 338); at least one radio, wherein the at least one radio is configured to perform cellular communication; one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications, wherein the one or more processors are configured to cause the UE to: receive a first set and a second set of hybrid automatic repeat request - HARQ - process numbers, the first set and the second set of HARQ process numbers corresponding to a first set and a second set of HARQ processes respectively, each HARQ process in the first set of HARQ processes is configured to enable a HARQ feedback; receive a Radio Resource Control - RRC - configuration message or a Medium Access Control Control Element - MAC CE - message to semi-statically enable or disable HARQ feedback for the HARQ processes in the second set of HARQ processes; receive a downlink control information - DCI - wherein a radio network temporary identifier - RNTI - is scrambled with cyclic redundancy check - CRC - bits of the DCI, the DCI including information to specify whether to disable or enable HARQ feedback for a specific downlink - DL - transmission; determine a HARQ process number in the first set or the second set of HARQ process numbers based on at least one of the RNTI or a field in the DCI; and configure the HARQ process to disable or enable a HARQ-based transmission from the UE in response to the RRC configuration message or the MAC CE message and in response to determining the HARQ process number is in the second set of HARQ process numbers. at least one antenna (335, 336, 337, 338); at least one radio, wherein the at least one radio is configured to perform cellular communication; one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications, wherein the one or more processors are configured to cause the UE to: receive a first set and a second set of hybrid automatic repeat request - HARQ - process numbers, the first set and the second set of HARQ process numbers corresponding to a first set and a second set of HARQ processes respectively, each HARQ process in the first set of HARQ processes is configured to enable a HARQ feedback; receive a Radio Resource Control - RRC - configuration message or a Medium Access Control Control Element - MAC CE - message to semi-statically enable or disable HARQ feedback for the HARQ processes in the second set of HARQ processes; receive a downlink control information - DCI - wherein a radio network temporary identifier - RNTI - is scrambled with cyclic redundancy check - CRC - bits of the DCI, the DCI including information to specify whether to disable or enable HARQ feedback for a specific downlink - DL - transmission; determine a HARQ process number in the first set or the second set of HARQ process numbers based on at least one of the RNTI or a field in the DCI; and configure the HARQ process to disable or enable a HARQ-based transmission from the UE in response to the RRC configuration message or the MAC CE message and in response to determining the HARQ process number is in the second set of HARQ process numbers. receive a first set and a second set of hybrid automatic repeat request - HARQ - process numbers, the first set and the second set of HARQ process numbers corresponding to a first set and a second set of HARQ processes respectively, each HARQ process in the first set of HARQ processes is configured to enable a HARQ feedback; receive a Radio Resource Control - RRC - configuration message or a Medium Access Control Control Element - MAC CE - message to semi-statically enable or disable HARQ feedback for the HARQ processes in the second set of HARQ processes; receive a downlink control information - DCI - wherein a radio network temporary identifier - RNTI - is scrambled with cyclic redundancy check - CRC - bits of the DCI, the DCI including information to specify whether to disable or enable HARQ feedback for a specific downlink - DL - transmission; determine a HARQ process number in the first set or the second set of HARQ process numbers based on at least one of the RNTI or a field in the DCI; and configure the HARQ process to disable or enable a HARQ-based transmission from the UE in response to the RRC configuration message or the MAC CE message and in response to determining the HARQ process number is in the second set of HARQ process numbers.