Operation method of UE related to sidelink communication and feedback in wireless communication system

A method of operating a sidelink transmitting user equipment (Tx UE) in a wireless communication system, the method comprising:

• transmitting, by a sidelink Tx UE, a plurality of (Physical Sidelink Shared Channel) PSSCH;
• receiving, by the sidelink transmission terminal, feedback for each of the plurality of PSSCH through a plurality of Frequency Division Multiplexed (FDMed) Physical Sidelink Feedback Channel (PSFCH) related resource;
• wherein, for sidelink feedback, each of the plurality of PSSCH has a first resource unit, and each of the plurality of PSFCH-related resources has a second resource unit,
• wherein the plurality of second resource units are sequentially allocated from smallest frequency index of the plurality of second resource units,
• wherein the plurality of second resource units are preferentially allocated from a first resource unit having a smallest time index in one frequency band,
• wherein the plurality of second resource units are preferentially allocated to a first resource unit having a largest time index in the one frequency band than a first resource unit having a smallest time index in next frequency band which has larger frequency than the one frequency band.

A receiving user equipment (Rx UE) in a wireless communication system, comprising:

• at least one processor;
• and
• at least one computer memory operably coupled to the at least one processor and storing instructions which when executed, cause the at least one processor to perform operations,
• wherein the operations include:
• receiving, by a sidelink Rx UE, a plurality of (Physical Sidelink Shared Channel) PSSCH;
• transmitting, by the sidelink Rx UE, feedback for each of the plurality of PSSCH through a plurality of Frequency Division Multiplexed (FDMed) Physical Sidelink Feedback Channel (PSFCH) resource and a second PSFCH related resource;
• wherein, for sidelink feedback, each of the plurality of PSSCH has a first resource unit, and each of the plurality of PSFCH-related resources has a second resource unit,
• wherein the plurality of second resource units are sequentially allocated from smallest frequency index of the plurality of second resource units,
• wherein the plurality of second resource units are preferentially allocated from a first resource unit having a smallest time index in one frequency band,
• wherein the plurality of second resource units are preferentially allocated to a first resource unit having a largest time index in the one frequency band than a first resource unit having a smallest time index in next frequency band which has larger frequency than the one frequency band.

A processor for receiving user equipment (Rx UE) in a wireless communication system, the processor perform operations for a user equipment (UE)

• wherein the operations include
• receiving, by a sidelink Rx UE, a plurality of Physical Sidelink Shared Channel (PSSCH);
• transmitting, by the sidelink Rx UE, feedback for each of the plurality of PSSCH through a plurality of Frequency Division Multiplexed (FDMed) Physical Sidelink Feedback Channel (PSFCH) related resources;
• wherein, for sidelink feedback, each of the plurality of PSSCH has a first resource unit, and each of the plurality of PSFCH-related resources has a second resource unit,
• wherein the plurality of second resource units are sequentially allocated from smallest frequency index of the plurality of second resource units,
• wherein the plurality of second resource units are preferentially allocated from a first resource unit having a smallest time index in one frequency band,
• wherein the plurality of second resource units are preferentially allocated to a first resource unit having a largest time index in the one frequency band than a first resource unit having a smallest time index in next frequency band which has larger frequency than the one frequency band.

A non-transitory computer-readable storage medium storing at least one computer program including instructions which, when executed by at least one processor, cause the at least one processor to perform operations for a sidelink receiving User Equipment (Rx UE),

• wherein the operations include
• receiving, by a sidelink Rx UE, a plurality of Physical Sidelink Shared Channel (PSSCH);
• transmitting, by the sidelink Rx UE, feedback for each of the plurality of PSSCH through a plurality of Frequency Division Multiplexed (FDMed) Physical Sidelink Feedback Channel (PSFCH) related resources;
• wherein, for sidelink feedback, each of the plurality of PSSCH has a first resource unit, and each of the plurality of PSFCH-related resources has a second resource unit,
• wherein the plurality of second resource units are sequentially allocated from smallest frequency index of the plurality of second resource units,
• wherein the plurality of second resource units are preferentially allocated from a first resource unit having a smallest time index in one frequency band,
• wherein the plurality of second resource units are preferentially allocated to a first resource unit having a largest time index in the one frequency band than a first resource unit having a smallest time index in next frequency band which has larger frequency than the one frequency band.