Method and apparatus for determining sidelink resources in nr v2x

A first device adapted to perform sidelink communication, the first device comprising:

• at least one memory storing instructions;
• at least one transceiver;
• and
• at least one processor connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes the instructions to:
• control the at least one transceiver to receive first synchronization information from a first synchronization source related to a global navigation satellite system (GNSS);
• control the at least one transceiver to receive second synchronization information from a second synchronization source related to a base station;
• determine a first resource for transmission of a physical sidelink control channel (PSCCH) based on a second time, based on that a difference value between a first time related to the first synchronization information and the second time related to the second synchronization information is greater than a pre-configured threshold value;
• control the at least one transceiver to transmit, to a second device through the PSCCH, first sidelink control information (SCI) based on the first resource;
• and
• control the at least one transceiver to transmit, through a physical sidelink shared channel (PSSCH) related to the PSCCH, second SCI different from the first SCI and data based on a second resource determined based on the first SCI.

A processing device adapted 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, wherein the at least one processor executes the instructions to:
• receive first synchronization information from a first synchronization source related to a global navigation satellite system (GNSS);
• receive second synchronization information from a second synchronization source related to a base station;
• determine a first resource for transmission of a physical sidelink control channel (PSCCH) based on a second time, based on that a difference value between a first time related to the first synchronization information and the second time related to the second synchronization information is greater than a pre-configured threshold value;
• transmit, to a second device through the PSCCH, first sidelink control information (SCI) based on the first resource;
• and
• transmit, through a physical sidelink shared channel (PSSCH) related to the PSCCH, second SCI different from the first SCI and data based on a second resource determined based on the first SCI.