Method and device for performing wireless communication related to SL DRX in NR V2X
Proposed are a method for a first device to perform wireless communication and a device supporting same. For example, the first device may acquire an SL DRX configuration including information related to the active period of a second device. For example, the first device may receive CG configuration information including a plurality of CGs from a base station through an RRC message. For example, the first device may receive information, related to activation of a first CG among the plurality of CGs, from the base station through a first PDCCH. For example, the first device may transmit CG index information including index information about the first CG to the base station on the basis that the first CG is not in the active period of the second device.
1 . A method for performing wireless communication by a first device, the method comprising:
obtaining sidelink (SL) discontinuous reception (DRX) configuration including information related to an active time of a second device,
wherein the SL DRX configuration includes at least one of information related to SL DRX cycle or information related to SL DRX timer,
wherein the SL DRX timer includes at least one of SL DRX onduration timer, SL DRX inactivity timer, SL DRX retransmission timer, or SL DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer, and
wherein at least one of a time that the SL DRX onduration timer is running, a time that the SL DRX inactivity timer is running, or a time that the SL DRX retransmission timer is running, is included within the active time of the second device;
receiving, from a base station, configured grant (CG) configuration information including a plurality of CGs via a radio resource control (RRC) message;
receiving, from the base station, information related to an activation of a first CG among the plurality of CGs via a first physical downlink control channel (PDCCH); and
transmitting, to the base station, CG index information including index information of the first CG, based on that the first CG is not within the active time of the second device.
2 . The method of claim 1 ,
wherein the CG index information is transmitted to the base station, based on that at least one resource among a plurality of resources allocated by the first CG is not within the active time of the second device.
3 . The method of claim 1 ,
wherein the index information of the first CG includes information representing at least one CG that is not within the active time of the second device.
4 . The method of claim 1 ,
wherein the index information of the first CG includes information representing at least one CG that is within the active time of the second device.
5 . The method of claim 1 ,
wherein the index information of the first CG includes a bitmap related to an index of the first CG,
wherein, on the bitmap, at least one CG that is not within the active time of the second device is configured as either 0 or 1, and
wherein, on the bitmap, the first CG that is within the active time of the second device is configured as either 0 or 1 and is configured differently with the at least one CG.
6 . The method of claim 1 , further comprising:
discarding the at least one CG, based on that at least one resource among a plurality of resources allocated by the first CG is not within the active time of the second device.
7 . The method of claim 1 ,
wherein the CG index information is transmitted to the base station via physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH), and
wherein the CG index information includes hybrid automatic repeat request (HARQ) acknowledgement (ACK) information related to the at least one CG.
8 . The method of claim 7 ,
wherein the HARQ ACK information related to the at least one CG includes at least one of information for activation of the at least one CG by the base station or information for deactivation of the at least one CG by the base station.
9 . The method of claim 1 ,
wherein the CG index information is transmitted to the base station via PUCCH or PUSCH, and
wherein the CG index information includes HARQ-NACK (negative acknowledgement) information that is related to the first CG that is within the active time of the second device.
10 . The method of claim 9 ,
wherein HARQ NACK information related to the at least one CG includes information for activation of the first CG within the active time of the second device by the base station.
11 . The method of claim 1 , further comprising:
receiving, from the base station, information related to activation of the CG that is excepted at least one CG that is not within the active time of the second device among the plurality of CGs, via a second PDCCH.
12 . The method of claim 1 ,
wherein the CG index information is transmitted to the base station, based on SL CG confirmation medium access control (MAC) control element (CE), and
wherein the SL CG confirmation MAC CE is a MAC CE for representing whether the information related to the activation of the first CG is received from the base station.
13 . The method of claim 1 , further comprising:
wherein the CG index information includes second CG index information that is within the active time of the second device among the plurality of CGs, and
receiving, from the base station, information related to an activation of the second CG that is within the active time of the second device among the plurality of CGs via a third PDCCH.
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 an active time of a second device,
wherein the SL DRX configuration includes at least one of information related to SL DRX cycle or information related to SL DRX timer,
wherein the SL DRX timer includes at least one of SL DRX onduration timer, SL DRX inactivity timer, SL DRX retransmission timer, or SL DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer, and
wherein at least one of a time that the SL DRX onduration timer is running, a time that the SL DRX inactivity timer is running, or a time that the SL DRX retransmission timer is running, is included within the active time of the second device;
receiving, from a base station, configured grant (CG) configuration information including a plurality of CGs via a radio resource control (RRC) message;
receiving, from the base station, information related to an activation of a first CG among the plurality of CGs via a first physical downlink control channel (PDCCH); and
transmitting, to the base station, CG index information including index information of the first CG, based on that the first CG is not within the active time of the second device.
15 . An apparatus adapted to control a first device, 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 at least one processor to perform operations comprising:
obtaining sidelink (SL) discontinuous reception (DRX) configuration including information related to an active time of a second device,
wherein the SL DRX configuration includes at least one of information related to SL DRX cycle or information related to SL DRX timer,
wherein the SL DRX timer includes at least one of SL DRX onduration timer, SL DRX inactivity timer, SL DRX retransmission timer, or SL DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer, and
wherein at least one of a time that the SL DRX onduration timer is running, a time that the SL DRX inactivity timer is running, or a time that the SL DRX retransmission timer is running, is included within the active time of the second device;
receiving, from a base station, configured grant (CG) configuration information including a plurality of CGs via a radio resource control (RRC) message;
receiving, from the base station, information related to an activation of a first CG among the plurality of CGs via a first physical downlink control channel (PDCCH); and
transmitting, to the base station, CG index information including index information of the first CG, based on that the first CG is not within the active time of the second device.
16 . The apparatus of claim 15 ,
wherein the CG index information is transmitted to the base station, based on that at least one resource among a plurality of resources allocated by the first CG is not within the active time of the second device.
17 . The apparatus of claim 15 ,
wherein the index information of the first CG includes information representing at least one CG that is not within the active time of the second device.
18 . The apparatus of claim 15 ,
wherein the index information of the first CG includes information representing at least one CG that is within the active time of the second device.
19 . The apparatus of claim 15 ,
wherein the index information of the first CG includes a bitmap related to an index of the first CG,
wherein, on the bitmap, at least one CG that is not within the active time of the second device is configured as either 0 or 1, and
wherein, on the bitmap, the first CG that is within the active time of the second device is configured as either 0 or 1 and is configured differently with the at least one CG.
20 . The apparatus of claim 15 , the operations further comprising:
discarding the at least one CG, based on that at least one resource among a plurality of resources allocated by the first CG is not within the active time of the second device.