Method and apparatus for transmitting HARQ feedback to base station in NR V2X

A first device adapted to perform wireless communication, the first device 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:
• control the one or more transceivers to receive, from a base station, information related to a physical uplink control channel (PUCCH) resource and information related to M sidelink (SL) slots;
• control the one or more transceivers to perform N physical sidelink shared channel (PSSCH) transmissions, based on N SL slots among the M SL slots;
• determine one physical sidelink feedback channel (PSFCH) slot related to the N PSSCH transmissions;
• control the one or more transceivers to receive information on K SL hybrid automatic repeat request (HARQ) feedbacks on the one PSFCH slot, in response to the N PSSCH transmissions;
• and
• control the one or more transceivers to transmit, to the base station, HARQ feedback information based on the PUCCH resource,
• wherein information on L HARQ feedbacks related to the one PSFCH slot is included in the HARQ feedback information,
• wherein the L is a number of SL slots related to the one PSFCH slot, and
• wherein the M, the N, the K and the L are positive integers, and the L is greater than or equal to the M, and the M is greater than or equal to the N, and the N is greater than or equal to the K.

A processing device adapted to control a first device performing wireless communication, the processing device comprising:

• one or more processors;
• and
• one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
• receive, from a base station, information related to a physical uplink control channel (PUCCH) resource and information related to M sidelink (SL) slots;
• perform N physical sidelink shared channel (PSSCH) transmissions, based on N SL slots among the M SL slots;
• determine one physical sidelink feedback channel (PSFCH) slot related to the N PSSCH transmissions;
• receive information on K SL hybrid automatic repeat request (HARQ) feedbacks on the one PSFCH slot, in response to the N PSSCH transmissions;
• and
• transmit, to the base station, HARQ feedback information based on the PUCCH resource,
• wherein information on L HARQ feedbacks related to the one PSFCH slot is included in the HARQ feedback information,
• wherein the L is a number of SL slots related to the one PSFCH slot, and
• wherein the M, the N, the K and the L are positive integers, and the L is greater than or equal to the M, and the M is greater than or equal to the N, and the N is greater than or equal to the K.