| CPC H04W 72/40 (2023.01) [H04L 1/1861 (2013.01); H04L 1/1893 (2013.01); H04L 5/0005 (2013.01); H04L 5/0037 (2013.01); H04L 5/0055 (2013.01); H04L 5/0092 (2013.01); H04W 4/40 (2018.02); H04W 4/70 (2018.02); H04W 28/04 (2013.01); H04W 28/0875 (2020.05); H04W 72/02 (2013.01); H04W 72/044 (2013.01); H04W 72/25 (2023.01); H04W 84/005 (2013.01); H04W 84/02 (2013.01); H04W 88/02 (2013.01); H04W 88/08 (2013.01); H04W 92/02 (2013.01); H04W 92/18 (2013.01)] | 5 Claims |

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1. A method comprising:
receiving, by a User Equipment (UE) from another UE, a data through a physical sidelink shared channel (PSSCH); and
transmitting, by the UE to the another UE, a Hybrid Automatic Repeat and request (HARQ)-ACK information through a Physical Sidelink Feedback Channel (PSFCH) in response to receiving the data through the PSSCH,
wherein a first resource pool related to the PSSCH includes PSSCH slot-subchannel based units, and a second resource pool related to the PSFCH includes PSFCH slot-PRB based units,
wherein the PSSCH slot-subchannel based units are associated with the PSFCH slot-PRB based units,
wherein the PSFCH slot-PRB based units are sequentially mapped to the PSSCH slot-subchannel based units from smallest index of the PSFCH slot-PRB based units in frequency domain, and
wherein the PSFCH slot-PRB based units are mapped to the PSSCH slot-subchannel based units, the mapping starts in ascending order of a smallest slot index of the PSSCH slot-subchannel based units and continues in ascending order of smallest subchannel index of the PSSCH slot-subchannel based units.
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