Method and apparatus for selecting resources based on partial sensing in NR V2X

A first device configured 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:
• trigger resource selection in a slot;
• and
• based on the trigger:
• determine a time interval of a selection window from the slot based on a remaining packet delay budget (PDB),
• wherein the selection window includes Y candidate slots;
• perform partial sensing of slots related to the selection window;
• select at least one resource for sidelink (SL) transmission within the selection window;
• transmit, to a second device through a physical sidelink control channel (PSCCH), a first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and a second SCI;
• and
• transmit, to the second device through the PSSCH, the second SCI and data;
• wherein, based on a number of slots, L, from the slot and before a first slot of the Y candidate slots of the selection window being smaller than a predetermined minimum number of slots configured for the partial sensing, the at least one resource is:
• randomly selected within the selection window, or
• selected within the Y candidate slots based on the sensing for the L slots from the slot and before the first slot of the Y candidate slots of the selection window,
• wherein the Y is a positive integer, and
• wherein the L is a positive integer.

A processing device configured to control a first device performing wireless communication, 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:
• trigger resource selection in a slot;
• and
• based on the trigger:
• determine a time interval of a selection window from the slot based on a remaining packet delay budget (PDB),
• wherein the selection window includes Y candidate slots;
• perform partial sensing of slots related to the selection window;
• select at least one resource for sidelink (SL) transmission within the selection window;
• transmit, to a second device through a physical sidelink control channel (PSCCH), a first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and a second SCI;
• and
• transmit, to the second device through the PSSCH, the second SCI and data;
• wherein, based on a number of slots, L, from the slot and before a first slot of the Y candidate slots of the selection window being smaller than a predetermined minimum number of slots configured for the partial sensing, the at least one resource is:
• randomly selected within the selection window, or
• selected within the Y candidate slots based on the sensing for the L slots from the slot and before the first slot of the Y candidate slots of the selection window,
• wherein the Y is a positive integer, and
• wherein the L is a positive integer.