Method and device for performing SL DRX operation in NR V2X
A method by which a first device performs wireless communication, and a device for supporting same are presented. The method comprises the steps of: acquiring an SL DRX configuration including information related to an SL DRX activation time of a first device; receiving, from a second device, information related to a plurality of resources, the information including information related to a frequency resource of the plurality of resources and information related to a time resource of the plurality of resources; performing a monitoring operation within the SL DRX activation time based on resource information; and determining, in N resources from among the plurality of resources, on the basis that the first SCI has not been received from the second device, resources after the N resources, for scheduling of a first PSSCH and second SCI, to be non-valid resources through the first PSCCH, wherein N can be a positive integer.
1 . A method for performing wireless communication by the first device, the method comprising:
obtaining sidelink (SL) discontinuous reception (DRX) configuration including information related to SL DRX active time of the first device;
receiving, from a second device, information related to a plurality of resources,
wherein the information related to the plurality of resources includes information related to a frequency resource of the plurality of resources and information related to a time resource of the plurality of resources;
performing a monitoring operation within SL DRX active time based on resource information; and
based on not receiving, from the second device, first sidelink control information (SCI) through first physical sidelink control channel (PSCCH), for scheduling a first physical sidelink shared channel (PSSCH) and a second SCI, on N resources among the plurality of resources, determining a resource after the N resources as a non-valid resource,
wherein N is a positive integer.
2 . The method of claim 1 , further comprising:
based on that the resource after the N resources is the non-valid resource, skipping the monitoring operation within the SL DRX active time based on the resource information.
3 . The method of claim 2 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes a monitoring for reception of information transmitted from the second device on the plurality of resources.
4 . The method of claim 3 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes the monitoring and a start of the SL DRX timer based on a success of a reception based on the monitoring.
5 . The method of claim 4 ,
wherein the SL DRX timer includes at least one of SL DRX inactivity time or SL DRX retransmission timer.
6 . The method of claim 3 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes the monitoring and a skipping of the start of the SL DRX timer based on a success of a reception based on the monitoring.
7 . The method of claim 1 ,
wherein the information related to the plurality of resources includes information for a resource reservation period, and
wherein the N resources is a resource within a first period among the resource reservation period.
8 . The method of claim 7 ,
wherein, based on that any of the first SCI is not received on the N resources, the resource after the N resources is determined as the non-valid resource.
9 . The method of claim 8 ,
wherein a time interval among the N resources the is identical, and
wherein the N is 3.
10 . The method of claim 7 ,
wherein a resource related to the resource reservation period among the resource after the N resources is determined as the non-valid resource.
11 . The method of claim 7 ,
wherein M resources among the N resources are the resource within the first period,
wherein M is the positive integer, smaller than the N, and
wherein a resource after the M resources is included in a second period next to the first period.
12 . The method of claim 1 ,
wherein, based on that the first SCI is not successfully received from the second device based on a resource reselection of the second device or a transmission drop of the second device, the resource after the N resources is determined as the non-valid resource,
wherein the resource reselection is a resource reselection based on a resource reselection based on a re-evaluation or based on a resource reselection based on a pre-emption checking, and
wherein the transmission drop is at least one of a transmission drop based on a uplink (UL)-SL prioritization or a transmission drop based on a congestion control.
13 . The method of claim 1 ,
wherein, based on that the first SCI is not successfully received from the second device based on a failure of a decoding of the first device, the resource after the N resources is determined as the non-valid resource.
14 . A first device performing wireless 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 is adapted to execute instructions to perform operations comprising:
obtaining sidelink (SL) discontinuous reception (DRX) configuration including information related to SL DRX active time of the first device;
receiving, from a second device, information related to a plurality of resources,
wherein the information related to the plurality of resources includes information related to a frequency resource of the plurality of resources and information related to a time resource of the plurality of resources;
performing a monitoring operation within SL DRX active time based on resource information; and
based on not receiving, from the second device, first sidelink control information (SCI) through first physical sidelink control channel (PSCCH), for scheduling a first physical sidelink shared channel (PSSCH) and a second SCI, on N resources among the plurality of resources, determining a resource after the N resources as a non-valid resource,
wherein N is a positive integer.
15 . An apparatus adapted to perform a first user equipment, the apparatus comprising:
at least one processor; and
at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the first user equipment to perform operations comprising:
obtaining sidelink (SL) discontinuous reception (DRX) configuration including information related to SL DRX active time of the first device;
receiving, from a second device, information related to a plurality of resources,
wherein the information related to the plurality of resources includes information related to a frequency resource of the plurality of resources and information related to a time resource of the plurality of resources;
performing a monitoring operation within SL DRX active time based on resource information; and
based on not receiving, from the second device, first sidelink control information (SCI) through first physical sidelink control channel (PSCCH), for scheduling a first physical sidelink shared channel (PSSCH) and a second SCI, on N resources among the plurality of resources, determining a resource after the N resources as a non-valid resource,
wherein N is a positive integer.
16 . The apparatus of claim 15 , the operations further comprising:
based on that the resource after the N resources is the non-valid resource, skipping the monitoring operation within the SL DRX active time based on the resource information.
17 . The apparatus of claim 16 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes a monitoring for reception of information transmitted from the second device on the plurality of resources.
18 . The apparatus of claim 17 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes the monitoring and a start of the SL DRX timer based on a success of a reception based on the monitoring.
19 . The apparatus of claim 18 ,
wherein the SL DRX timer includes at least one of SL DRX inactivity time or SL DRX retransmission timer.
20 . The apparatus of claim 17 ,
wherein the monitoring operation within the SL DRX active time based on the resource information includes the monitoring and a skipping of the start of the SL DRX timer based on a success of a reception based on the monitoring.