Method for transmitting and receiving scheduling grant in wireless communication system supporting device-to-device communication, and device for same
The present invention discloses a method for transmitting a synchronization signal and a synchronization channel in a wireless communication system supporting Device-to-Device (D2D) communication; and an apparatus for the method. More specifically, a method for transmitting a D2D synchronization signal and a D2D synchronization channel in a wireless communication system supporting D2D communication comprises mapping the D2D synchronization signal and the D2D synchronization channel to a physical resource; and transmitting the mapped D2D synchronization signal and D2D synchronization channel to a UE, wherein the D2D synchronization signal is mapped to 64 subcarriers in the frequency domain, and the D2D synchronization channel is mapped to the same resource block with the D2D synchronization signal.
1. In a wireless communication system supporting Device-to-Device (D2D) communication, a method for transmitting an SA (Scheduling Assignment) including an SA 1 and an SA 2, the method comprising:
receiving, by a first user equipment (UE), resource configuration information for an SA resource pool with which the first UE transmits the SA 1 and for a data resource pool with which the first UE transmits data from an eNB;
transmitting, by the first UE, the SA 1 to a second UE by mapping the SA 1 to a specific resource region within the SA resource pool; and
transmitting, by the first UE, the SA 2 and the data to the second UE by mapping the SA 2 and the data to a specific resource region within the data resource pool,
wherein the specific resource region in which the SA 2 and the data are transmitted is specified by a position of the specific resource region in which the SA 1 is transmitted and/or contents of the SA 1.
2. The method of claim 1 , wherein the contents of the SA 1 and contents of the SA 2 are combined to specify the transmission: resource region of the data.
3. The method of claim 1 , wherein the SA 1 includes transmission resource region information of the SA 2 and the data.
4. The method of claim 3 , wherein a Modulation and Coding Scheme (MCS) of the SA 2 is predetermined.
5. The method of claim 1 , wherein the SA 1 includes transmission resource region information of the SA 2 and the data; and MCS information about the SA 2 and/or the data.
6. The method of claim 1 , wherein the SA 1 includes only transmission resource region information of the data, and the transmission resource region of the SA 2 is determined from the transmission resource region of the data.
7. The method of claim 1 , wherein the SA 1 is mapped to a resource region allocated for transmission of the SA 1 by the eNB.
8. The method of claim 1 , wherein the SA 2 and the data are mapped to a resource region allocated for transmission of the SA 2 and the data by the eNB.
9. The method of claim 1 , wherein the SA 1, the SA 2, and the data are mapped to a resource region determined arbitrarily by the first UE.
10. The method of claim 1 , wherein the SA 2 includes one or more of the following: an MCS related to the data, a New Data Indicator (NDI), a Redundancy Version (RV), Multiple Input Multiple Output (MIMO) information, and power control information.
11. The method of claim 1 , wherein blind decoding is performed on the specific resource region in which the SA 1 is transmitted in order to find the SA 1, and wherein the specific resource region in which the SA 1 is transmitted is predetermined by the eNB.
12. The method of claim 1 , wherein blind decoding is performed on the specific resource region in which the SA 1 is transmitted in order to find the SA 1, and wherein the specific resource region in which the SA 1 is transmitted is determined on the basis of an identifier shared by the first and the second UE.
13. The method of claim 1 , wherein the resource configuration information is transmitted through a System Information Block (SIB), a Physical Downlink Control Channel (PDCCH), or an Enhanced PDCCH (EPDCCH).
14. In a wireless communication system supporting D2D communication, a first user equipment (UE) transmitting an SA (Scheduling Assignment) that includes an SA 1 and an SA 2, the first UE comprising:
a Radio Frequency (RF) unit that transmits and receives a radio signal; and
a processor that controls the RF unit to:
receive resource configuration information for an SA resource pool with which the processor transmits the SA 1 and for a data resource pool with which the processor transmits data from an eNB;
transmit an SA 1 to a second UE by mapping the SA 1 to a specific resource region within the SA resource pool; and
transmit an SA 2 and data to the second UE by mapping the SA 2 and the data to a specific resource region within the data resource pool,
wherein the specific resource region in which the SA 2 and the data are transmitted is specified by a position of the specific resource region in which the SA 1 is transmitted and/or contents of the SA 1.