Method and apparatus for carrying out partial sensing on basis of transmission period of user equipment in NR V2X
Proposed is a method for operation of a first device ( 100 ) in a wireless communication system. The method may comprise the steps of: triggering resource selection; determining at least one candidate slot for periodic based partial sensing (PBPS) related to the resource selection; selecting a sidelink (SL) resource on the basis of a candidate resource set related to the at least one candidate slot; and transmitting, on the basis of the SL resource, sidelink control information (SCI) to a second device ( 200 ), wherein, on the basis of the PBPS related to a transmission period of an MAC PDU, having not been completed, the SCI does not include information related to a reservation period of the MAC PDU.
1 . A method comprising:
performing synchronization with a synchronization source;
obtaining information related to a resource pool;
triggering resource selection for an inter-device physical control channel resource or an inter-device physical shared channel resource for transmitting a medium access control protocol data unit, within the resource pool;
determining at least one candidate slot for periodic based partial sensing related to the resource selection;
selecting an inter-device resource, based on a candidate resource set related to the at least one candidate slot; and
transmitting, to a second device, inter-device control information based on the inter-device resource,
wherein the inter-device control information does not include information related to a reservation period of the medium access control protocol data unit, when the periodic based partial sensing related to a transmission period of the medium access control protocol data unit is not completed.
2 . The method of claim 1 , further comprising:
attempting the periodic based partial sensing on at least one first sensing slot related to the at least one candidate slot; and
determining that the periodic based partial sensing is not completed on a second sensing slot among the at least one first sensing slot,
wherein the inter-device resource is a resource related to the second sensing slot, and
wherein the inter-device control information does not include the information related to the reservation period of the medium access control protocol data unit, when it is determined that the periodic based partial sensing is not completed.
3 . The method of claim 2 , wherein a third sensing slot among the at least one first sensing slot is determined based on a transmission period related to the medium access control protocol data unit.
4 . The method of claim 3 , wherein the at least one first sensing slot is at least one slot that precedes the at least one candidate slot by k times the transmission period.
5 . The method of claim 1 , wherein the inter-device resource is selected based on contiguous partial sensing, when the periodic based partial sensing is not completed.
6 . The method of claim 1 , further comprising:
determining a resource selection window for the resource selection within the resource pool,
wherein the inter-device resource is randomly selected within the selection window, when the periodic based partial sensing is not completed.
7 . The method of claim 1 , wherein the periodic based partial sensing is attempted within a time duration which is determined based on a threshold value.
8 . The method of claim 1 , wherein a first device including information related to the reservation period of the medium access control protocol data unit in the inter-device control information is not allowed, when the periodic based partial sensing is not completed.
9 . The method of claim 1 , wherein a resource reservation period field value of the inter-device control information is 0, when the periodic based partial sensing is not completed.
10 . The method of claim 1 , further comprising:
performing sensing for at least one sensing slot related to the at least one candidate slot; and
excluding a resource with a reference signal received power greater than or equal to a threshold value from the candidate resource set, based on the performed sensing.
11 . The method of claim 10 , wherein the inter-device resource is selected within the candidate resource set from which the resource with the reference signal received power greater than or equal to the threshold value is excluded.
12 . The method of claim 1 , wherein the resource selection is related to a periodic transmission.
13 . The method of claim 1 , further comprising:
determining a resource selection window for the resource selection within the resource pool,
wherein the candidate resource set is included within the resource selection window.
14 . A first device comprising:
one or more processors;
one or more transceivers; and
one or more memories connected to the one or more processors and storing instructions,
wherein the instructions, based on being executed by the one or more processors, cause the first device to:
perform synchronization with a synchronization source;
obtain information related to a resource pool;
trigger resource selection for an inter-device physical control channel resource or an inter-device physical shared channel resource for transmitting a medium access control protocol data unit, within the resource pool;
determine at least one candidate slot for periodic based partial sensing related to the resource selection;
select an inter-device resource, based on a candidate resource set related to the at least one candidate slot; and
transmit, to a second device, inter-device control information based on the inter-device resource,
wherein the inter-device control information does not include information related to a reservation period of the medium access control medium access control, when the periodic based partial sensing related to a transmission period of the medium access control protocol data unit is not completed.
15 . A processing device adapted to control a first device, the processing device comprising:
one or more processors; and
one or more memories connected to the one or more processors and storing instructions, wherein the instructions, based on being executed by the one or more processors, cause the first device to:
perform synchronization with a synchronization source;
obtain information related to a resource pool;
trigger resource selection for an the instructions, based on being executed by resource or an inter-device physical shared a channel resource for transmitting a medium access control protocol data unit, within the resource pool;
determine at least one candidate slot for periodic based partial sensing related to the resource selection;
select an inter-device resource, based on a candidate resource set related to the at least one candidate slot; and
transmit, to a second UE, inter-device control information based on the inter-device resource,
wherein the inter-device control information does not include information related to a reservation period of the medium access control medium access control, when the periodic based partial sensing related to a transmission period of the medium access control protocol data unit is not completed.