Method for transmitting and receiving signal through sidelink in next generation wireless communication system, and apparatus therefor
The present application provides a method for transmitting and receiving, by a terminal, a sidelink signal through a subframe including a plurality of symbols in a wireless communication system. Specifically, the method comprises the steps of receiving a first sidelink control signal including symbol information for a sidelink data signal, on a predetermined first symbol of a subframe; receiving the sidelink data signal on the subframe according to the first sidelink control signal; and transmitting a second sidelink control signal including response information for the sidelink data signal, on a second symbol of the subframe, wherein the first symbol is determined under the assumption that a maximum number of symbols reserved for a downlink control signal exist on the subframe, and the second symbol is a symbol immediately before a symbol reserved for an uplink control signal on the subframe.
1. A method performed by a user equipment operating in a wireless communication system, the method comprising:
receiving, in a first symbol of a subframe configured with a plurality of symbols, a first sidelink control signal including symbol information for a sidelink data signal;
receiving the sidelink data signal in the subframe according to the first sidelink control signal; and
transmitting, in a second symbol of the subframe, a second sidelink control signal including response information regarding the sidelink data signal,
wherein a location of the first symbol is determined based on an assumption that a number of symbols that are reserved for a downlink control signal exist in the subframe as many as a maximum number, and
wherein a location of the second symbol is immediately before a third symbol that is reserved for an uplink control signal in the subframe.
2. The method of claim 1 , wherein the first symbol comprises a symbol reserved for the downlink control signal and a symbol defined next to one symbol reserved as a guard period for timing advance application among a plurality of symbols.
3. The method of claim 2 , wherein information on the number of symbols reserved for the downlink control signal is received from a base station through a higher layer.
4. The method of claim 1 , further comprising transmitting a third sidelink control signal through a specific symbol of the subframe before receiving the sidelink data signal,
wherein the third sidelink control signal comprises second response information regarding a second sidelink data signal that is received in a different subframe before the subframe.
5. The method of claim 1 , wherein the symbols that are reserved for the downlink control signal are reserved by starting from an initial symbol of the subframe.
6. The method of claim 1 , wherein the third symbol that is reserved for the uplink control signal is a last symbol of the subframe.
7. A user equipment configured to operate in a wireless communication system, the user equipment comprising:
a wireless communication module;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
receiving, in a first symbol of a subframe through the wireless communication module, a first sidelink control signal including symbol information for a sidelink data signal;
receiving, through the wireless communication module, receive the sidelink data signal in the subframe according to the first sidelink control signal;
transmitting, in a second symbol of the subframe, a second sidelink control signal including response information regarding the sidelink data signal,
wherein a location of the first symbol is determined based on an assumption that a number of symbols that are reserved for a downlink control signal exist in the subframe as many as a maximum number, and
wherein a location of the second symbol is immediately before a third symbol that is reserved for an uplink control signal in the subframe.
8. The user equipment of claim 7 , wherein the first symbol comprises a symbol reserved for the downlink control signal and a symbol defined next to one symbol reserved as a guard period for timing advance application among a plurality of symbols.
9. The user equipment of claim 8 , wherein information on the number of symbols reserved for the downlink control signal is received from a base station through a higher layer.
10. The user equipment of claim 7 , wherein the operations further comprise:
transmitting processor transmits a third sidelink control signal through a specific symbol of the subframe before receiving the sidelink data signal, and
wherein the third sidelink control signal comprises second response information regarding a second sidelink data signal that is received in a different subframe before the subframe.
11. The user equipment of claim 7 , wherein the symbols that are reserved for the downlink control signal are reserved by starting from an initial symbol of the subframe.
12. The user equipment of claim 7 , wherein the third symbol that is reserved for the uplink control signal is a last symbol of the subframe.