Method for controlling a feedback process in a communication between nodes of a communication system, comprising selectively employing one or both of a first feedback process and a second feedback process , said first and second feedback processes being Hybrid Automatic Repeat Request, HARQ, processes, wherein the first feedback process provides faster feedback than the second feedback process and the second feedback process provides more reliable feedback than the first feedback process , wherein the first feedback process is a self-contained HARQ feedback process, wherein the self-contained HARQ feedback process is implemented such that a subframe contains a downlink part and an uplink part, allowing for the first HARQ feedback process in the uplink part of the data transmission (31a; 31b) just having occurred in the downlink part, and feedback messages in the first feedback process are periodically transmitted using a preconfigured transmission resource, and the second feedback process is a scheduled HARQ feedback process, and said selectively employing is done based on a required level of reliability and timing constraints, wherein - if a low latency is required the first feedback process is selected and - if a high reliability is required the second feedback process is selected and - if both low latency and high reliability is required a combination of both feedback processes is selected, and wherein feedback messages in the first feedback process contain feedback to a single HARQ process while feedback messages in the second feedback process contain feedback to all active HARQ processes, and wherein the first and second feedback processes operate at least partly on the same transmission buffers or queues. wherein the first feedback process provides faster feedback than the second feedback process and the second feedback process provides more reliable feedback than the first feedback process , wherein the first feedback process is a self-contained HARQ feedback process, wherein the self-contained HARQ feedback process is implemented such that a subframe contains a downlink part and an uplink part, allowing for the first HARQ feedback process in the uplink part of the data transmission (31a; 31b) just having occurred in the downlink part, and feedback messages in the first feedback process are periodically transmitted using a preconfigured transmission resource, and the second feedback process is a scheduled HARQ feedback process, and said selectively employing is done based on a required level of reliability and timing constraints, wherein - if a low latency is required the first feedback process is selected and - if a high reliability is required the second feedback process is selected and - if both low latency and high reliability is required a combination of both feedback processes is selected, - if a low latency is required the first feedback process is selected and - if a high reliability is required the second feedback process is selected and - if both low latency and high reliability is required a combination of both feedback processes is selected, and wherein feedback messages in the first feedback process contain feedback to a single HARQ process while feedback messages in the second feedback process contain feedback to all active HARQ processes, and wherein the first and second feedback processes operate at least partly on the same transmission buffers or queues. <EOS>