Method and device for requesting transmission resource for relay 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:
• receive, from a second device, a first physical sidelink control channel (PSCCH) and a first physical sidelink shared channel (PSSCH) related to the first PSCCH;
• receive, from a third device, a second PSCCH and a second PSSCH related to the second PSCCH;
• store data received through the first PSSCH in a first buffer;
• store data received through the second PSSCH in a second buffer;
• transmit, to a base station, at least one of a scheduling request (SR) or a buffer status report (BSR) related to the first buffer, based on available data in the first buffer;
• receive, from the base station, information related to a first resource in response to at least one of the SR or the BSR related to the first buffer;
• and
• transmit, to a fourth device, data in the first buffer by using the first resource.

An apparatus adapted to control a first user equipment (UE) performing wireless communication, the apparatus 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 UE, a first physical sidelink control channel (PSCCH) and a first physical sidelink shared channel (PSSCH) related to the first PSCCH;
• receive, from a third UE, a second PSCCH and a second PSSCH related to the second PSCCH;
• store data received through the first PSSCH in a first buffer;
• store data received through the second PSSCH in a second buffer;
• transmit, to a base station, at least one of a scheduling request (SR) or a buffer status report (BSR) related to the first buffer, based on available data in the first buffer;
• receive, from the base station, information related to a first resource in response to at least one of the SR or the BSR related to the first buffer;
• and
• transmit, to a fourth UE, data in the first buffer by using the first resource.