There is disclosed a user equipment for a Radio Access Network. The user equipment is adapted for communicating utilizing a first transmission timing structure having a first number of symbols, and for communicating utilizing a second transmission timing structure comprising a second number of symbols. The user equipment further is adapted for receiving first signaling based on the first transmission timing structure and for transmitting acknowledgement signaling pertaining to the first signaling based on the second transmission timing structure, wherein the user equipment is adapted to start transmitting the acknowledgement signaling at a starting symbol of the second transmission timing structure, the starting symbol being determined based on a configuration of the user equipment.