Various communication systems may benefit from improved HARQ. For example, it may be helpful to improve HARQ in non-terrestrial networks. A method may include receiving at a user equipment a configuration from a network entity. The configuration may include a hybrid automatic repeat request virtual process number. The method may also include receiving at the user equipment a downlink control information from the network entity. The downlink control information may include a hybrid automatic repeat request virtual process identification. In addition, the method may include receiving at the user equipment another downlink control information. The another downlink control information may include the hybrid automatic repeat request virtual process identification. Further, the method may include determining at the user equipment a difference between a timing of a transmission indicated by the downlink control information and another timing of another transmission indicated by the another downlink control information.