Method for determining sidelink transmission power in NR V2X, and synchronization

A first device configured to perform wireless communication, the first device comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• obtaining synchronization related to sidelink (SL) communication from a synchronization reference;
• obtaining first information related to a first power control parameter;
• obtaining second information related to a second power control parameter;
• obtaining third information related to a third power control parameter;
• determining a first transmit power value based on the first information and a downlink (DL) pathloss between a base station and the first device;
• determining a fourth transmit power value based on a minimum value between a second transmit power value and a third transmit power value, wherein the second transmit power value is related to the second information and the DL pathloss, and the third transmit power value is related to the third information and a SL pathloss between the first device and a second device;
• transmitting, to the second device, a sidelink synchronization signal block (S-SSB) based on the first transmit power value and the synchronization;
• and
• transmitting, to the second device, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) based on the fourth transmit power value.

A processing device configured to control a first device, the processing device comprising:

• at least one processor;
• and
• at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• obtaining synchronization related to sidelink (SL) communication from a synchronization reference;
• obtaining first information related to a first power control parameter;
• obtaining second information related to a second power control parameter;
• obtaining third information related to a third power control parameter;
• determining a first transmit power value based on the first information and a downlink (DL) pathloss between a base station and the first device;
• determining a fourth transmit power value based on a minimum value between a second transmit power value and a third transmit power value, wherein the second transmit power value is related to the second information and the DL pathloss, and the third transmit power value is related to the third information and a SL pathloss between the first device and a second device;
• transmitting, to the second device, a sidelink synchronization signal block (S-SSB) based on the first transmit power value and the synchronization;
• and
• transmitting, to the second device, a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) based on the fourth transmit power value.