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 of transmitting, by a first terminal, device-to-device (D2D) data in a wireless communication system the method comprising:
receiving, from a base station, information for resource pool used in a D2D communication via a higher layer signaling,
wherein the information for the resource pool includes first resource information related to control information transmission and second resource information related to a D2D data transmission;
receiving, from the base station, a first downlink control information (DCI) related to the D2D communication;
generating the control information based on the first DCI;
transmitting, to a second terminal, the control information,
wherein the control information includes information related to the D2D data transmission; and
transmitting the D2D data to the second terminal,
wherein at least one padding bit is appended until a size of a second DCI related to a communication with the base station is equal to a size of the first DCI.
2. The method of claim 1 , wherein the at least one padding bit is appended to the second DCI.
3. The method of claim 1 , wherein a format of the second DCI is a DCI format 0 or a DCI format 1A.
4. The method of claim 1 , wherein a format of the first DCI is a DCI format 5.
5. The method of claim 1 , wherein the first DCI is CRC (Cyclic Redundancy Check)-masked with a separate RNTI (Radio Network Temporary Identifier) which is distinguished from a C (Cell)-RNTI.
6. The method of claim 1 , wherein the first DCI is CRC (Cyclic Redundancy Check) scrambled by a D2D RNTI (Radio Network Temporary Identifier).
7. The method of claim 1 , wherein the receiving the first DCI comprises blind-decoding PDCCH in a search space.
8. The method of claim 7 , wherein the blind-decoding comprises performing a CRC-check for the PDCCH with a C-RNTI and a D2D-RNTI, respectively.
9. A first terminal for transmitting device-to-device (D2D) data in a wireless communication system, the first terminal comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor functionally connected to the at least one transceiver,
wherein the at least one processor is configured to:
receive, from a base station, information for resource pool used in a D2D communication via a higher layer signaling,
wherein the information for the resource pool includes first resource information related to a control information transmission and second resource information related to a D2D data transmission;
receive, from the base station, a first downlink control information (DCI) related to the D2D communication;
generate the control information based on the first DCI;
transmit, to a second terminal, the control information,
wherein the control information includes information related to the D2D data transmission; and
transmit the D2D data to the second terminal,
wherein at least one padding bit is appended until the size of a second DCI related to a communication with the base station is equal to the size of the first DCI.
10. The first terminal of claim 9 , wherein the at least one padding bit is appended to the second DCI.
11. The first terminal of claim 9 , wherein a format of the second DCI is a DCI format 0 or a DCI format 1A.
12. The first terminal of claim 9 , wherein a format of the first DCI is a DCI format 5.
13. The first terminal of claim 9 , wherein the first is CRC (Cyclic Redundancy Check)-masked with a separate RNTI (Radio Network Temporary Identifier) which is distinguished from a C (Cell)-RNTI.
14. The first terminal of claim 9 , wherein the first DCI format is CRC (Cyclic Redundancy Check) scrambled by a D2D RNTI (Radio Network Temporary Identifier).
15. The first terminal of claim 9 , wherein the at least one processor is configured to perform a CRC-check for a PDCCH (physical downlink control channel) with a C-RNTI and a D2D-RNTI in a search space.