Patent attributes
It is determined that a first feedback for a first downlink data transmission is to be sent (or received) in a subframe n. If it is further determined that a second feedback for a second downlink data transmission is to be sent (or received) in a first slot of the subframe n, the first feedback is transmitted (or received) within a predetermined short transmission time interval within the first slot. As an addition, if it is further determined there is no second downlink data for which corresponding feedback is to be sent (or received) in the first slot of the subframe n, the first feedback is transmitted (or received) in at least the first slot.