Method and device for transmitting or receiving information on basis of resource in NR V2X

1 . A method comprising:

determining, by a first apparatus, a selection window;

selecting, by the first apparatus, a first resource and a second resource within the selection window based on sensing;

transmitting, by the first apparatus to a second apparatus, first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH), through a first physical sidelink control channel (PSCCH), based on the first resource, wherein the first SCI includes information related to a frequency domain of the second resource and information related to a time domain of the second resource; and

transmitting, by the first apparatus to the second apparatus, a medium access control protocol data unit (MAC PDU), through the first PSSCH, based on the first resource,

wherein a time gap between the first resource and the second resource is selected, by the first apparatus, to be smaller than or equal to a threshold value which is a processing time required by the first apparatus for completing resource selection or resource re-selection.

2 . The method of claim 1 , further comprising:

determining, by the first apparatus, a first difference value between the time gap between the first resource and the second resource and the threshold value.

3 . The method of claim 2 , wherein the first apparatus is not allowed to select the second resource after the threshold value, starting from the first resource.

4 . The method of claim 1 ,

wherein the first SCI includes information related to a frequency domain of a re-selected second resource and information related to a time domain of the re-selected second resource, based on a re-selection of the second resource.

5 . The method of claim 1 , further comprising:

selecting, by the first apparatus, a third resource; and

transmitting, by the first apparatus to the second apparatus, second SCI for scheduling a second PSSCH and fourth SCI, through a second PSCCH, based on the second resource,

wherein the second SCI includes information related to a frequency domain of the third resource and information related to a time domain of the third resource.

6 . The method of claim 5 ,

wherein the second SCI includes information related to a frequency domain of a re-selected third resource and information related to a time domain of the re-selected third resource, based on a re-selection of the third resource.

7 . The method of claim 4 , wherein the re-selected second resource is re-selected based on re-evaluation or pre-emption checking.

8 . The method of claim 5 , wherein a time gap between the second resource and the third resource is selected, by the first apparatus, to be smaller than or equal to to the threshold value.

9 . The method of claim 4 , wherein the re-selected second resource is re-selected before a reception point of the first SCI, inclusive.

10 . The method of claim 1 , wherein the MAC PDU is hybrid automatic repeat request (HARQ) feedback disabled.

11 . A first apparatus 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, cause the first apparatus to perform operations comprising:

determining a selection window;

selecting a first resource and a second resource within the selection window based on sensing;

transmitting, to a second apparatus, first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH), through a first physical sidelink control channel (PSCCH), based on the first resource,

wherein the first SCI includes information related to a frequency domain of the second resource and information related to a time domain of the second resource; and

transmitting, to the second apparatus, a medium access control protocol data unit (MAC PDU), through the first PSSCH, based on the first resource,

wherein a time gap between the first resource and the second resource is selected, by the first apparatus, to be smaller than or equal to a threshold value which is a processing time required by the first apparatus for completing resource selection or resource re-selection.

12 . A processing 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, cause a first user equipment (UE) to perform operations comprising:

determining a selection window;

selecting a first resource and a second resource within the selection window based on sensing;

transmitting, to a second UE, first sidelink control information (SCI) for scheduling a first physical sidelink shared channel (PSSCH), through a first physical sidelink control channel (PSCCH), based on the first resource,

wherein the first SCI includes information related to a frequency domain of the second resource and information related to a time domain of the second resource; and

transmitting, to the second UE, a medium access control protocol data unit (MAC PDU), through the first PSSCH, based on the first resource,

wherein a time gap between the first resource and the second resource is selected, by the first UE, to be smaller than or equal to a threshold value which is a processing time required by the first UE for completing resource selection or resource re-selection.

13 . The first apparatus of claim 11 , wherein the operations further comprise:

determining a first difference value between the time gap between the first resource and the second resource and the threshold value.

14 . The processing device of claim 12 , wherein the first UE is not allowed to select the second resource after the threshold value, starting from the first resource.