Method and apparatus for performing sidelink communication based on data link in NR V2X
Provided herein are a method for performing wireless communication by a first apparatus and an apparatus for supporting the same. The method may include the steps of receiving a service from a second apparatus, through a data link including multiple data paths, and determining whether or not to transmit a sidelink hybrid automatic repeat request (SL HARQ) feedback being related to the service to the second apparatus. Herein, based on Quality of Service (QoS) requirements of a service being transmitted through the multiple data paths, the data link may include the multiple data paths.
1. A method for transmitting, by a first apparatus, hybrid automatic repeat request (HARQ) feedback, the method comprising:
receiving, from a second apparatus, sidelink control information (SCI) including information that enables the HARQ feedback related to a first Medium Access Control Protocol Data Unit (MAC PDU);
receiving, from the second apparatus, the first MAC PDU including data related to enabling of the HARQ feedback; and
transmitting, to the second apparatus, the HARQ feedback in response to the first MAC PDU,
wherein the first MAC PDU includes no data related to disabling of the HARQ feedback.
2. The method of claim 1 , wherein the data related to enabling of the HARQ feedback and the data related to disabling of the HARQ feedback is not multiplexed into the first MAC PDU.
3. The method of claim 1 , wherein the data related to enabling of the HARQ feedback is data related to high Quality of Service (QoS) requirement.
4. The method of claim 1 , wherein the data related to enabling of the HARQ feedback is data within predetermined Quality of Service (QoS) requirement range.
5. The method of claim 1 , further comprising:
receiving, from the second apparatus, a second MAC PDU including data related to disabling of the HARQ feedback,
wherein the second MAC PDU includes no data related to enabling of the HARQ feedback.
6. The method of claim 5 , wherein the HARQ feedback in response to the second MAC PDU is not transmitted to the second apparatus.
7. The method of claim 5 , further comprising:
receiving, from the second apparatus, sidelink control information (SCI) including information that disables the HARQ feedback related to the second MAC PDU.
8. The method of claim 5 , wherein the data related to disabling of the HARQ feedback is data related to low Quality of Service (QoS) requirements.
9. A first apparatus for transmitting hybrid automatic repeat request (HARQ) feedback, the first apparatus comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:
receive, from a second apparatus, sidelink control information (SCI) including information that enables the HARQ feedback related to a first Medium Access Control Protocol Data Unit (MAC PDU);
receive, from the second apparatus, the first MAC PDU including data related to enabling of the HARQ feedback; and
transmit, to the second apparatus, the HARQ feedback in response to the first MAC PDU,
wherein the first MAC PDU includes no data related to disabling of the HARQ feedback.
10. The first apparatus of claim 9 , wherein the data related to enabling of the HARQ feedback and the data related to disabling of the HARQ feedback is not multiplexed into the first MAC PDU.
11. The first apparatus of claim 9 , wherein the data related to enabling of the HARQ feedback is data related to high Quality of Service (QoS) requirement.
12. The first apparatus of claim 9 , wherein the data related to enabling of the HARQ feedback is data within predetermined Quality of Service (QoS) requirement range.
13. The first apparatus of claim 9 , wherein the one or more processors execute the instructions to:
receive, from the second apparatus, a second MAC PDU including data related to disabling of the HARQ feedback,
wherein the second MAC PDU includes no data related to enabling of the HARQ feedback.
14. The first apparatus of claim 13 , wherein the HARQ feedback in response to the second MAC PDU is not transmitted to the second apparatus.
15. The first apparatus of claim 13 , wherein the one or more processors execute the instructions to:
receive, from the second apparatus, sidelink control information (SCI) including information that disables the HARQ feedback related to the second MAC PDU.
16. The first apparatus of claim 13 , wherein the data related to disabling of the HARQ feedback is data related to low Quality of Service (QoS) requirements.
17. An apparatus configured to control a first user equipment (UE), the apparatus comprising:
one or more processors; and
one or more memories being operably connectable to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
receive, from a second UE, sidelink control information (SCI) including information that enables the HARQ feedback related to a first Medium Access Control Protocol Data Unit (MAC PDU);
receive, from the second UE, the first MAC PDU including data related to enabling of the HARQ feedback; and
transmit, to the second UE, the HARQ feedback in response to the first MAC PDU,
wherein the first MAC PDU includes no data related to disabling of the HARQ feedback.
18. The apparatus of claim 17 , wherein the data related to enabling of the HARQ feedback and the data related to disabling of the HARQ feedback is not multiplexed into the first MAC PDU.