METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS COMMUNICATIONS SYSTEM AND APPARATUS THEREFOR

摘要

According to an embodiment of the present invention, a method for transmitting and receiving a signal in a wireless communications system includes the steps of: transmitting an uplink data from a first sub-frame to a base station; and receiving a reception confirmation response to the uplink data on a downlink time-frequency resource of a second sub-frame associated with the first sub-frame, wherein if the second sub-frame transmits a shortened DMRS (Demodulation Reference Signal), the downlink time-frequency resource is included in at least a part of REs (Resource Elements) adjacent to the RE (Resource Element) transmitting the shortened DMRS, and the RE transmitting the shortened DMRS is the cell specified one of the REs capable of being reserved for the DMRS.