Configuring an acknowledgement/negative acknowledgement transmission using a physical sidelink feedback channel in unlicensed spectrum

A method of wireless communication performed by a user equipment (UE), comprising:

• receiving a physical sidelink control channel (PSCCH) transmission that uses unlicensed spectrum;
• selecting a resource block (RB) configuration for one or more resource blocks (RBs) that are associated with a physical sidelink feedback channel (PSFCH) transmission, the RB configuration being based at least in part on the unlicensed spectrum, wherein the RB configuration for one or more RBs is based at least in part on a resource pool and a PSFCH capacity demand;
• and
• transmitting an acknowledgement (ACK)/negative acknowledgement (NACK) response to the PSCCH transmission based at least in part on using the PSFCH and the RB configuration for the one or more RBs.

A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
• receive a physical sidelink control channel (PSCCH) transmission that uses unlicensed spectrum;
• select a resource block (RB) configuration for one or more resource blocks (RBs) that are associated with a physical sidelink feedback channel (PSFCH) transmission, the RB configuration being based at least in part on the unlicensed spectrum, wherein the RB configuration for one or more RBs is based at least in part on a resource pool and a PSFCH capacity demand;
• and
• transmit an acknowledgement (ACK)/negative acknowledgement (NACK) response to the PSCCH transmission based at least in part on using the PSFCH and the RB configuration for the one or more RBs.

An apparatus for wireless communication, comprising:

• means for receiving a physical sidelink control channel (PSCCH) transmission that uses unlicensed spectrum;
• means for selecting a resource block (RB) configuration for one or more resource blocks (RBs) that are associated with a physical sidelink feedback channel (PSFCH) transmission, the RB configuration being based at least in part on the unlicensed spectrum, wherein the RB configuration for one or more RBs is based at least in part on a resource pool and a PSFCH capacity demand;
• and
• means for transmitting an acknowledgement (ACK)/negative acknowledgement (NACK) response to the PSCCH transmission based at least in part on using the PSFCH and the RB configuration for the one or more RBs.