Method and device for entering sleep mode by terminal in nr v2x

A method for performing wireless communication by a first device, the method comprising:

• receiving, from a second device, a physical sidelink control channel (PSCCH);
• receiving, from the second device, a physical sidelink shared channel (PSSCH) related to the PSCCH,
• wherein sidelink control information (SCI) is received through the PSCCH or the PSSCH related to the PSCCH, and
• wherein the SCI includes information representing whether the PSSCH is a last PSSCH transmission;
• determining a physical sidelink feedback channel (PSFCH) resource based on an index of a slot and an index of a sub-channel related to the PSSCH;
• transmitting, to the second device, sidelink (SL) hybrid automatic repeat request (HARQ) acknowledgment (ACK) information through the PSFCH resource;
• and
• entering a sleep state, based on the SCI including information representing that the PSSCH is the last PSSCH transmission and the SL HARQ ACK information being transmitted through the PSFCH resource by the first device.

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 second device, a physical sidelink control channel (PSCCH);
• control the one or more transceivers to receive, from the second device, a physical sidelink shared channel (PSSCH) related to the PSCCH,
• wherein sidelink control information (SCI) is received through the PSCCH or the PSSCH related to the PSCCH, and
• wherein the SCI includes information representing whether the PSSCH is a last PSSCH transmission;
• determine a physical sidelink feedback channel (PSFCH) resource based on an index of a slot and an index of a sub-channel related to the PSSCH;
• control the one or more transceivers to transmit, to the second device, sidelink (SL) hybrid automatic repeat request (HARQ) acknowledgment (ACK) information through the PSFCH resource;
• and
• enter a sleep state, based on the SCI including information representing that the PSSCH is the last PSSCH transmission and the SL HARQ ACK information being transmitted through the PSFCH resource by the first device.

A processing device adapted to control a first device, 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 second device, a physical sidelink control channel (PSCCH);
• receive, from the second device, a physical sidelink shared channel (PSSCH) related to the PSCCH,
• wherein sidelink control information (SCI) is received through the PSCCH or the PSSCH related to the PSCCH, and
• wherein the SCI includes information representing whether the PSSCH is a last PSSCH transmission;
• determine a physical sidelink feedback channel (PSFCH) resource based on an index of a slot and an index of a sub-channel related to the PSSCH;
• transmit, to the second device, sidelink (SL) hybrid automatic repeat request (HARQ) acknowledgment (ACK) information through the PSFCH resource;
• and
• enter a sleep state, based on the SCI including information representing that the PSSCH is the last PSSCH transmission and the SL HARQ ACK information being transmitted through the PSFCH resource by the first device.