Method and device for transmitting reception confirmation response in wireless communication system
One embodiment of the present invention relates to a method for transmitting and receiving signals between devices in a wireless communication system, the signal transmission and reception method comprising the steps of: receiving, by a first device, a signal from a second device; and transmitting, by the first device, a reception confirmation response to the signal, wherein a resource region in which the reception confirmation response is transmitted is differentiated according to whether the reception confirmation response is ACKnowledgement (ACK) or Negative ACKnowledgement (NACK), and the resource region in which the reception confirmation response is transmitted is commonly used for devices which have received the signal.
1. As a method for transmitting and receiving signals between devices in a wireless communication system, the signal transmission and reception method comprises the steps of:
receiving, by a first device, a signal from other devices; and
transmitting, by the first device, a reception confirmation in response to the signal,
wherein a resource region in which the reception confirmation is transmitted is differentiated according to whether the reception confirmation is ACKnowledgement (ACK) or Negative ACKnowledgement (NACK),
wherein the resource region in which the reception confirmation is transmitted is commonly used for devices which have received the signal, and
wherein the resource region is allocated only to devices having a pathloss of the signal greater than a predetermined value.
2. The method of claim 1 , wherein, among the resource regions in which a reception confirmation is transmitted, when energy equal to or greater than a predetermined value is detected in a resource region corresponding to the Negative ACKnowledgement (NACK), the signal transmission and reception method further comprises the step of:
receiving a re-transmission related to the signal.
3. The method of claim 2 , wherein the re-transmission related to the signal is broadcasted by the first device.
4. The method of claim 1 , wherein the signal is multi-casted to the other devices.
5. The method of claim 1 , wherein the transmission power the first device uses to transmit the reception confirmation is proportional to a pathloss between the first device and each of the other devices.
6. A D2D device for transmitting and receiving signals between devices in a wireless communication system, the device comprising:
a radio frequency (RF) unit; and
a processor that:
controls the RF unit to receive a signal from other devices, and
controls the RF unit to transmit a reception confirmation in response to the signal,
wherein a resource region in which the reception confirmation is transmitted is differentiated according to whether the reception confirmation is ACKnowledgement (ACK) or Negative ACKnowledgement (NACK),
wherein the resource region in which the reception confirmation is transmitted is commonly used for devices which have received the signal, and
wherein the resource region is allocated only to devices having a pathloss of the signal greater than a predetermined value.