Method and apparatus for device-to-device UE for transceiving signal in wireless communication system
An embodiment according to the present invention, with respect to a method for a device-to-device (D2D) UE for transceiving a signal, comprises the steps of: receiving a D2D communication resource configuration; and transmitting a D2D communication signal on the basis of the D2D communication resource configuration, wherein if the UE transmits a D2D communication signal by means of a resource indicated by a base station, then the D2D communication signal is transmitted in a first timing determined from a value indicating a timing offset between uplink and downlink radio frames (N TA ), and if the UE selects a resource which will transmit the D2D communication signal, then the D2D communication signal is transmitted in a second timing determined without regard to the value indicating the timing offset between the uplink and downlink radio frames (N TA ).
1. A method for transmitting and receiving a signal by a Device-to-Device (D2D) User equipment (UE) in a wireless communication system, the method comprising:
receiving a D2D communication resource configuration; and
transmitting a D2D communication signal based on the D2D communication resource configuration,
wherein when the D2D UE transmits the D2D communication signal by using resources indicated by a base station, the D2D communication signal is transmitted at a first timing determined from a Timing Advance (TA), and when the D2D UE selects resources for transmission of the D2D communication signal, the D2D communication signal is transmitted at a second timing determined irrespective of the TA.
2. The method according to claim 1 , wherein the first timing is determined from a value (N TA ) determined from the TA and a fixed TA offset (N TAoffset ).
3. The method according to claim 2 , wherein the first timing is defined by (N TA +N TAoffset )*Ts, where N TA is 16*TA, N TAoffset is a fixed TA offset, and Ts is a basic time unit.
4. The method according to claim 3 , wherein N TAoffset is 625 in Time Division Duplex (TDD) and 0 in Frequency Division Duplex (FDD).
5. The method according to claim 1 , wherein the first timing is an uplink timing of the D2D UE.
6. The method according to claim 1 , wherein when the first timing is used, the D2D UE is in transmission mode 1.
7. The method according to claim 1 , wherein the second timing is not related to a TA command.
8. The method according to claim 1 , wherein the second timing is predetermined.
9. The method according to claim 1 , wherein the second timing is defined by N TAoffset *Ts where N TAoffset is a fixed TA offset and Ts is a basic time unit.
10. The method according to claim 1 , wherein the second timing is a downlink timing.
11. The method according to claim 1 , wherein when the second timing is used, the D2D UE is in transmission mode 2.
12. A Device-to-Device (D2D) User equipment (UE) for transmitting and receiving a D2D signal in a wireless communication system, the D2D UE comprising:
a transmitter and a receiver; and
a processor, operably coupled to the transmitter and the receiver, that:
controls the receiver to receive a D2D communication resource configuration, and the transmitter to transmit a D2D communication signal based on the D2D communication resource configuration,
wherein when the D2D UE transmits the D2D communication signal by using resources indicated by a base station, the D2D communication signal is transmitted at a first timing determined from a Timing Advance (TA), and when the D2D UE selects resources for transmission of the D2D communication signal, the D2D communication signal is transmitted at a second timing determined irrespective of the TA.