Method for transmitting and receiving data in wireless communication system, and device for same
The present specification relates to a method for transmitting and receiving data in a wireless communication system supporting device-to-device (D2D) communication, and the method performed by a first terminal comprises the steps of: acquiring a resource pool used for D2D communication, wherein the resource pool includes either a scheduling assignment (SA) resource pool indicating a resource region through which an SA is transmitted or a data resource pool indicating a resource region through which D2D data is transmitted; transmitting, to a second terminal through the SA resource pool, the SA including information related to D2D data transmission; and transmitting the D2D data to the second terminal.
1. A method for transmitting, by a first terminal, device-to-device (D2D) data in a wireless communication system, the method comprising:
receiving, from a base station, a resource pool used in a D2D communication via a higher layer signaling,
wherein the resource pool includes first resource information related to a first control information transmission and second resource information related to a D2D data transmission;
receiving, from the base station, a first downlink control information (DCI) format defined for the D2D communication;
generating the first control information based on the received first DCI format;
transmitting, to a second terminal, the generated first control information,
wherein the generated first control information includes information related to the D2D data transmission; and
transmitting the D2D data to the second terminal,
wherein the first DCI format is CRC (Cyclic Redundancy Check) scrambled by a specific RNTI (Radio Network Temporary Identifier),
wherein the specific RNTI is a D2D RNTI, and
wherein at least one padding bit is appended until a size of the first DCI format is equal to a size of a second DCI format.
2. The method of claim 1 , wherein the first DCI format is CRC (cyclic redundancy check)-masked with a separate RNTI (radio network temporary identifier) which is distinguished from a C (cell)-RNTI.
3. The method of claim 1 , wherein the first DCI format is DCI format 5.
4. The method of claim 1 , wherein the second DCI format is a DCI format 0.
5. The method of claim 1 , wherein the at least one padding bit is appended to the first DCI format.
6. The method of claim 1 , wherein the receiving the first DCI format comprises blind-decoding PDCCH in a search space.
7. The method of claim 6 , wherein the blind-decoding comprises performing a CRC-check for the PDCCH with a C-RNTI and the D2D-RNTI, respectively.
8. A first terminal for transmitting device-to-device (D2D) data in a wireless communication system, the first terminal comprising:
a radio frequency (RF) unit for transmitting and receiving a wireless signal; and
a processor functionally connected to the RF unit,
wherein the processor is configured to:
receive, from a base station, a resource pool used in a D2D communication via a higher layer signaling,
wherein the resource pool includes first resource information related to a first control information transmission and second resource information related to a D2D data transmission;
receive, from the base station, a first downlink control information (DCI) format defined for the D2D communication;
generate the first control information based on the received first DCI format;
transmit, to a second terminal, the generated first control information,
wherein the generated first control information includes information related to the D2D data transmission; and
transmit the D2D data to the second terminal,
wherein the first DCI format is CRC (Cyclic Redundancy Check) scrambled by a specific RNTI (Radio Network Temporary Identifier),
wherein the specific RNTI is a D2D RNTI, and
wherein at least one padding bit is appended until the size of the first DCI format is equal to the size of a second DCI format.
9. The first terminal of claim 8 , wherein the at least one padding bit is appended to the first DCI format.
10. The first terminal of claim 8 , wherein the processor is configured to perform a CRC-check for a PDCCH (physical downlink control channel) with a C-RNTI and the D2D-RNTI in a search space.