Method and apparatus for reporting HARQ feedback to base station in NR V2X
Methods, and devices capable of performing such methods, involving a device that receives information related to a physical uplink control channel resource for reporting hybrid automatic repeat request (HARQ) feedback information, as well as information related to sidelink (SL) resources. Based on the device not performing a physical sidelink control channel (PSCCH) transmission, the device generates the HARQ feedback information in the form of an acknowledgement (ACK). Further, a maximum priority value is associated with the ACK, among possible priority values, related to the SL resources, such that, a PUCCH is transmitted with the ACK based on the priority value.
1. A method for performing wireless communication by a device, the method comprising:
receiving, from a base station, information related to a physical uplink control channel (PUCCH) resource and information related to sidelink (SL) resources;
generating hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information; and
performing, based on a priority value of the HARQ-ACK information, a PUCCH transmission with the HARQ-ACK information on the PUCCH resource,
wherein, based on that the device does not perform a physical sidelink control channel (PSCCH) transmission in the SL resources and for which the device is provided the PUCCH resource to report the HARQ-ACK information, the HARQ-ACK information is generated as ACK and the priority value of the ACK is the same as a maximum priority value among possible priority values related to the SL resources, and
wherein, based on that the device performs a physical sidelink shared channel (PSSCH) transmission in the SL resources, the priority value of the HARQ-ACK information is determined based on a priority of the PSSCH transmission related to the HARQ-ACK information.
2. The method of claim 1 ,
wherein the SL resources are allocated by a dynamic grant, and
wherein, based on that the device does not perform the PSCCH transmission in the SL resources allocated by the dynamic grant, the HARQ-ACK information is generated as the ACK and the priority value of the ACK is the same as the maximum priority value among the possible priority values related to the SL resources.
3. The method of claim 1 , wherein SL communication of the device overlaps in time domain with the PUCCH transmission on the PUCCH resource.
4. The method of claim 3 , wherein the PUCCH transmission is performed based on that the priority value is smaller than a priority value of the SL communication.
5. The method of claim 3 , wherein the SL communication is performed based on that the priority value is larger than a priority value of the SL communication.
6. The method of claim 3 , wherein, based on that (i) the priority value is smaller than a priority value of the SL communication and (ii) a sum of power related to the PUCCH transmission and power related to the SL communication exceeds maximum transmit power of the device, the power related to the SL communication is reduced such that the sum does not exceed the maximum transmit power.
7. The method of claim 3 , wherein, based on that (i) the priority value is larger than a priority value of the SL communication and (ii) a sum of power related to the PUCCH transmission and power related to the SL communication exceeds maximum transmit power of the device, the power related to the PUCCH transmission is reduced such that the sum does not exceed the maximum transmit power.
8. The method of claim 1 , further comprising:
performing physical random access channel (PRACH) transmission to the base station, wherein a priority related to the PRACH transmission is higher than a priority related to physical sidelink feedback channel (PSFCH) transmission or a priority related to sidelink-synchronization signal block (S-SSB) transmission.
9. A device adapted to perform wireless communication, the device comprising:
at least one transceiver;
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause the first device to perform operations comprising:
receiving, from a base station, information related to a physical uplink control channel (PUCCH) resource and information related to sidelink (SL) resources;
generating hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information; and
performing, based on a priority value of the HARQ-ACK information, a PUCCH transmission with the HARQ-ACK information on the PUCCH resource,
wherein, based on that the device does not perform a physical sidelink control channel (PSCCH) transmission in the SL resources and for which the device is provided the PUCCH resource to report the HARQ-ACK information, the HARQ-ACK information is generated as ACK and the priority value of the ACK is the same as a maximum priority value among possible priority values related to the SL resources, and
wherein, based on that the device performs a physical sidelink shared channel (PSSCH) transmission in the SL resources, the priority value of the HARQ-ACK information is determined based on a priority of the PSSCH transmission related to the HARQ-ACK information.
10. The device of claim 9 ,
wherein the SL resources are allocated by a dynamic grant, and
wherein, based on that the device does not perform the PSCCH transmission in the SL resources allocated by the dynamic grant, the HARQ-ACK information is generated as the ACK and the priority value of the ACK is the same as the maximum priority value among the possible priority values related to the SL resources.
11. A processing device adapted to control a device performing wireless communication, the processing device comprising:
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause the first device to perform operations comprising:
receiving, from a base station, information related to a physical uplink control channel (PUCCH) resource and information related to sidelink (SL) resources;
generating hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information; and
performing, based on a priority value of the HARQ-ACK information, a PUCCH transmission with the HARQ-ACK information on the PUCCH resource,
wherein, based on that the device does not perform a physical sidelink control channel (PSCCH) transmission in the SL resources and for which the device is provided the PUCCH resource to report the HARQ-ACK information, the HARQ-ACK information is generated as ACK and the priority value of the ACK is the same as a maximum priority value among possible priority values related to the SL resources, and
wherein, based on that the device performs a physical sidelink shared channel (PSSCH) transmission in the SL resources, the priority value of the HARQ-ACK information is determined based on a priority of the PSSCH transmission related to the HARQ-ACK information.
12. The processing device of claim 11 ,
wherein the SL resources are allocated by a dynamic grant, and
wherein, based on that the device does not perform the PSCCH transmission in the SL resources allocated by the dynamic grant, the HARQ-ACK information is generated as the ACK and the priority value of the ACK is the same as the maximum priority value among the possible priority values related to the SL resources.