Method and device for performing partial sensing on basis of multi-hop in NR V2X
An operation method of a first device ( 100 ) in a wireless communication system is proposed. The method may comprise the steps of: receiving, on a sensing slot related to one or more candidate slots, first sidelink control information (SCI) including information related to a resource reservation period of a second device ( 200 ) from the second device ( 200 ); acquiring an integer value on the basis of a value acquired by dividing a time interval between a first slot and a last slot among the one or more candidate slots by the resource reservation period of the second device ( 200 ); and selecting a sidelink (SL) resource within the one or more candidate slots on the basis of the integer value.
1 . A method for performing, by a first device, wireless communication, the method comprising:
obtaining information related to partial sensing;
determining at least one candidate slot for the partial sensing;
receiving, from a second device, first sidelink control information (SCI) including information related to a resource reservation period of the second device, on a sensing slot related to the at least one candidate slot;
obtaining an integer value, based on a value derived by dividing a time between a first slot and a last slot of the at least one candidate slot by the resource reservation period of the second device;
selecting a sidelink (SL) resource within the at least one candidate slot, based on the integer value;
transmitting, to a third device, second SCI for scheduling of a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), based on the SL resource; and
transmitting, to the third device, a medium access control (MAC) protocol data unit (PDU) through the PSSCH, based on the SL resource.
2 . The method of claim 1 , wherein the integer value is an integer value greater than or equal to the value derived by dividing the time between the first slot and the last slot by the resource reservation period of the second device.
3 . The method of claim 2 , wherein the integer value is a smallest value among integer values greater than or equal to the value derived by dividing the time between the first slot and the last slot by the resource reservation period of the second device.
4 . The method of claim 1 , further comprising:
obtaining information related to a resource pool;
triggering resource selection for transmitting the MAC PDU, within the resource pool; and
determining at least one candidate resource related to the resource selection,
wherein the partial sensing is related to the resource selection.
5 . The method of claim 4 , further comprising:
determining a resource to exclude among the at least one candidate resource, based on the first SCI; and
excluding the resource to exclude from the at least one candidate resource.
6 . The method of claim 5 , further comprising:
determining at least one resource related to the second device, based on the first SCI,
wherein the resource to exclude is determined based on the at least one resource related to the second device.
7 . The method of claim 6 , wherein the resource to exclude includes a resource that follows the at least one resource related to the second device by a value derived by multiplying the resource reservation period of the second device and an integer greater than or equal to 0, which is smaller than or equal to the integer value.
8 . The method of claim 6 , wherein the resource to exclude includes a first resource, based on i) a resource that follows the at least one resource related to the second device by a value multiplying the resource reservation period of the second device and an integer greater than or equal to 0, which is smaller than or equal to the integer value and ii) a second resource that follows the first resource among the at least one candidate resource by a zero or greater integer multiple of a resource reservation period of the first device overlapping.
9 . The method of claim 5 , wherein the at least one candidate resource is transferred from a physical layer of the first device to a MAC layer of the first device.
10 . The method of claim 5 , wherein the at least one candidate slot includes the at least one candidate resource, and
wherein the SL resource is selected from the at least one candidate resource.
11 . The method of claim 1 , wherein the sensing slot is determined based on a resource reservation period of the first device and the at least one candidate slot.
12 . The method of claim 1 , wherein integer value is obtained based on a value derived by dividing a time between a time point that precedes the first slot by a processing time and the last slot by the resource reservation period of the second device.
13 . The method of claim 1 , wherein the sensing slot is a last slot among slots that precede a time that precedes the first slot among the at least one candidate slot by a processing time, among slots before positive integer multiple of a resource reservation period of the first device from the at least one candidate slot.
14 . A first device for performing 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:
obtain information related to partial sensing;
determine at least one candidate slot for the partial sensing;
receive, from a second device, first sidelink control information (SCI) including information related to a resource reservation period of the second device, on a sensing slot related to the at least one candidate slot;
obtain an integer value, based on a value derived by dividing a time between a first slot and a last slot of the at least one candidate slot by the resource reservation period of the second device;
select a sidelink (SL) resource within the at least one candidate slot, based on the integer value;
transmit, to a third device, second SCI for scheduling of a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), based on the SL resource; and
transmit, to the third device, a medium access control (MAC) protocol data unit (PDU) through the PSSCH, based on the SL resource.
15 . A device adapted to control a first user equipment (UE), the device comprising:
one or more processors; and
one or more memories operably connectable to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
obtain information related to partial sensing;
determine at least one candidate slot for the partial sensing;
receive, from a second UE, first sidelink control information (SCI) including information related to a resource reservation period of the second UE, on a sensing slot related to the at least one candidate slot;
obtain an integer value, based on a value derived by dividing a time between a first slot and a last slot of the at least one candidate slot by the resource reservation period of the second UE;
select a sidelink (SL) resource within the at least one candidate slot, based on the integer value;
transmit, to a third UE, second SCI for scheduling of a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), based on the SL resource; and
transmit, to the third UE, a medium access control (MAC) protocol data unit (PDU) through the PSSCH, based on the SL resource.
16 . A non-transitory computer-readable storage medium storing instructions that, when executed, cause a first device to:
obtain information related to partial sensing;
determine at least one candidate slot for the partial sensing;
receive, from a second device, first sidelink control information (SCI) including information related to a resource reservation period of the second device, on a sensing slot related to the at least one candidate slot;
obtain an integer value, based on a value derived by dividing a time between a first slot and a last slot of the at least one candidate slot by the resource reservation period of the second device;
select a sidelink (SL) resource within the at least one candidate slot, based on the integer value;
transmit, to a third device, second SCI for scheduling of a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), based on the SL resource; and
transmit, to the third device, a medium access control (MAC) protocol data unit (PDU) through the PSSCH, based on the SL resource.