Method and apparatus for performing SL DRX operation in NR V2X
Provided are a method by which a first device performs wireless communication, and an apparatus supporting same. The method may comprise the steps of: acquiring at least one sidelink (SL) discontinuous reception (DRX) configuration; receiving, from a second device, first sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), on the basis of an SL DRX configuration from among the at least one SL DRX configuration; and receiving, from the second device, second SCI including a source ID and a destination ID, and a medium access control (MAC) protocol data unit (PDU) through the PSSCH.
1 . A method, comprising:
obtaining, by a first device, sidelink (SL) discontinuous reception (DRX) related parameters;
determining, by the first device, a destination identifier (ID) based on a service type related to SL communication;
based on the first device being interested for reception for the destination ID, selecting, by the first device, a parameter for an SL DRX active time related to the destination ID among the SL DRX related parameters;
receiving, by the first device from a second device, through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH), based on the parameter for the SL DRX active time; and
receiving, by the first device from the second device, through the PSSCH, a medium access control (MAC) protocol data unit (PDU), based on the parameter for the SL DRX active time.
2 . The method of claim 1 , wherein the parameter for the SL DRX active time is selected based on a Quality of Service (QoS) requirement related to the destination ID.
3 . The method of claim 1 , wherein the SCI is detected within the SL DRX active time.
4 . The method of claim 1 , further comprising:
transmitting, to a base station, assistance information related to an SL DRX configuration.
5 . The method of claim 4 , wherein the assistance information includes information regarding the SL DRX configuration related to a service of interest.
6 . The method of claim 5 , wherein the information regarding the SL DRX configuration includes an active time of the SL DRX configuration or a parameter related to an SL DRX operation.
7 . The method of claim 4 , wherein the assistance information includes information regarding a type of a service of interest.
8 . The method of claim 4 , wherein the assistance information includes information regarding a Quality of Service (QoS) requirement related to a service of interest or a PC5 QoS Identifier (PQI) related to the service of interest.
9 . The method of claim 4 , wherein the assistance information includes information regarding whether an SL DRX operation is applied for each destination ID or a PQI related to a service of interest.
10 . The method of claim 1 , wherein, based on establishment of a radio resource control (RRC) connection between the second device and a base station, the SL DRX related parameters are determined by the base station, and the first device obtains the SL DRX related parameters determined by the base station from the base station through the second device, and
wherein, based on no establishment of the RRC connection between the second device and the base station, the SL DRX related parameters are determined by the second device, and the first device obtains the SL DRX related parameters determined by the second device from the second device.
11 . The method of claim 1 , wherein information reported to a base station by the second device includes information regarding whether an SL DRX operation is applied for each destination ID or a PQI related to a service of interest.
12 . The method of claim 1 , further comprising:
determining, based on a relationship between the first device and the second device, whether the second device satisfies qualification as an entity that determines the parameter for the SL DRX active time; and
selecting, based on the determination that the second device satisfies the qualification, the parameter for the SL DRX active time determined by the second device among the SL DRX related parameters.
13 . A first 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 the first device to perform operations comprising:
obtaining sidelink (SL) discontinuous reception (DRX) related parameters;
determining a destination identifier (ID) based on a service type related to SL communication;
based on the first device being interested for reception for the destination ID, selecting a parameter for an SL DRX active time related to the destination ID among the SL DRX related parameters;
receiving, from a second device, through a physical sidelink control channel (PSCCH), sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH), based on the parameter for the SL DRX active time; and
receiving, from the second device, through the PSSCH, a medium access control (MAC) protocol data unit (PDU), based on the parameter for the SL DRX active time.
14 . The first device of claim 13 , wherein the parameter for the SL DRX active time is selected based on a Quality of Service (QoS) requirement related to the destination ID.
15 . The first device of claim 13 , wherein the first SCI is detected within the SL DRX active time.
16 . A processing device, 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, cause a first device to perform operations comprising:
obtaining sidelink (SL) discontinuous reception (DRX) related parameters;
determining a destination identifier (ID) based on a service type related to SL communication;
based on the first device being interested for reception for the destination ID, selecting a parameter for an SL DRX active time related to the destination ID among the SL DRX related parameters;
receiving, from a second device, through a physical sidelink control channel (PSCCH), sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH), based on the parameter for the SL DRX active time; and
receiving, from the second device, through the PSSCH, a medium access control (MAC) protocol data unit (PDU), based on the parameter for the SL DRX active time.
17 . The processing device of claim 16 , wherein the parameter for the SL DRX active time is selected based on a Quality of Service (QoS) requirement related to the destination ID.
18 . The processing device of claim 16 , wherein the SCI is detected within the SL DRX active time.