Method and apparatus for terminal type operation sl drix in nr v2x

Abstract

A method for operating a first device (100) in a wireless communication system is presented. The method can include the steps of obtaining at least one sidelink discontinuous reception (SL DRX) setting; obtaining information regarding whether a second device is to receive a service SL DRX operation related to a service data unit (SDU) is to be enabled; determining that the second device is to perform the SL DRX operation for the SDU related service based on the information regarding whether the SL DRX operation of the second device is to be enabled is indicated; determining the SL DRX setting from the one or more SL DRX settings based on a quality of service (QoS) request related to the SDU; generating a medium access control protocol data unit (MAC PDU) based on the SDU; and transmitting the MAC PDU to the second device in an active time of the SL DRX setting.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems. Background Technology

[0002] Sidelink (SL) communication is a communication scheme that establishes a direct link between user equipment (UE) and allows UEs to directly exchange voice and data without the intervention of evolved Node B (eNB). SL communication is being considered as a solution to the eNB overhead caused by the rapid growth of data services. V2X (Vehicle-to-Everything) refers to a communication technology used by vehicles to exchange information with other vehicles, pedestrians, and objects equipped with infrastructure. V2X can be divided into four types: V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-Network), and V2P (Vehicle-to-Pedestrian). V2X communication can be provided through the PC5 interface and / or the Uu interface.

[0003] Furthermore, the increasing demand for larger communication capacity from various communication devices has led to a growing need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Consequently, the design of communication systems for UEs or services sensitive to reliability and latency is under discussion. Next-generation radio access technologies based on enhanced mobile broadband communications, massive machine-type communications (MTC), and ultra-reliable low-latency communications (URLLC) can be termed novel RATs or NRs (new radio technologies). In this paper, NR can also support vehicle-to-everything (V2X) communications. Summary of the Invention

[0004] Technical solution

[0005] According to an embodiment, a method for operating a first device 100 in a wireless communication system is proposed. The method may include: obtaining at least one sidelink discontinuous reception (SL) DRX configuration; obtaining information related to whether SL DRX operation for a service associated with a second device 200 receiving a Service Data Unit (SDU) is enabled, and the SDU; determining, based on the information related to whether the SL DRX operation is enabled, whether the SL DRX operation of the second device 200 is enabled, whether the second device 200 performs SL DRX operation for the service associated with the SDU; determining the SL DRX configuration among the at least one SL DRX configuration based on the Quality of Service (QoS) requirements associated with the SDU; generating a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU; and sending the MAC PDU to the second device 200 during the active time of the SL DRX configuration.

[0006] Beneficial effects

[0007] User equipment (UE) can effectively perform SL communication. Attached Figure Description

[0008] Figure 1 The structure of an NR system based on an embodiment of this disclosure is shown.

[0009] Figure 2 A radio protocol architecture based on an embodiment of this disclosure is shown.

[0010] Figure 3 The structure of an NR radio frame based on an embodiment of this disclosure is shown.

[0011] Figure 4 The structure of a time slot for an NR frame based on an embodiment of this disclosure is shown.

[0012] Figure 5 An example of a BWP based on an embodiment of this disclosure is shown.

[0013] Figure 6 This illustrates a process by which a UE performs V2X or SL communication based on a transport mode, according to an embodiment of this disclosure.

[0014] Figure 7 Three broadcast types based on embodiments of this disclosure are shown.

[0015] Figure 8 An example is shown whereby, according to an embodiment of the present disclosure, the transmitting UE determines, based on the transmission profile, whether the receiving UE performs an SL DRX operation.

[0016] Figure 9 An example is shown whereby a transmitting UE generates and transmits a MAC PDU based on an SL DRX configuration according to an embodiment of the present disclosure.

[0017] Figure 10 This illustrates the process by which a first device performs wireless communication according to an embodiment of the present disclosure.

[0018] Figure 11 The process of a second device performing wireless communication according to an embodiment of the present disclosure is illustrated.

[0019] Figure 12 A communication system 1 based on an embodiment of the present disclosure is shown.

[0020] Figure 13 A wireless device based on an embodiment of the present disclosure is shown.

[0021] Figure 14 A signal processing circuit for transmitting signals is shown based on an embodiment of the present disclosure.

[0022] Figure 15Another example of a wireless device based on an embodiment of this disclosure is shown.

[0023] Figure 16 A handheld device based on an embodiment of the present disclosure is shown.

[0024] Figure 17 Vehicles or autonomous vehicles based on embodiments of this disclosure are shown. Detailed Implementation

[0025] In this disclosure, "A or B" may mean "A only", "B only", or "both A and B". In other words, in this disclosure, "A or B" can be interpreted as "A and / or B". For example, in this disclosure, "A, B or C" may mean "A only", "B only", "C only", or "any combination of A, B, and C".

[0026] The forward slash ( / ) or comma used in this disclosure can mean "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0027] In this disclosure, "at least one of A and B" can mean "only A", "only B" or "both A and B". Additionally, in this disclosure, the expression "at least one of A or B" or "at least one of A and / or B" can be interpreted as "at least one of A and B".

[0028] Additionally, in this disclosure, "at least one of A, B, and C" may mean "A only", "B only", "C only" or "any combination of A, B, and C". Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0029] Additionally, the brackets used in this disclosure may mean "for example". Specifically, when indicated as "Control Message (PDCCH)", this may mean that "PDCCH" is cited as an example of "control message". In other words, "control message" in this disclosure is not limited to "PDCCH", and "PDCCH" may be cited as an example of "control message". Specifically, when indicated as "control message (i.e., PDCCH)", this may also mean that "PDCCH" is cited as an example of "control message".

[0030] In the following description, “when…”, “if…”, or “in the case of…” can be replaced with “based on”.

[0031] The technical features described individually in one of the accompanying drawings of this disclosure may be implemented individually or simultaneously.

[0032] In this disclosure, higher-layer parameters can be parameters configured, pre-configured, or predefined for the UE. For example, a base station or network can send higher-layer parameters to the UE. For instance, higher-layer parameters can be sent via Radio Resource Control (RRC) signaling or Media Access Control (MAC) signaling.

[0033] The technologies described below can be used in various wireless communication systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Evolved UTRA (E-UTRA). IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with IEEE 802.16e-based systems. UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of the Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0034] 5G NR is a successor technology to LTE-A, corresponding to a new type of mobile communication system with high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low-frequency bands below 1 GHz, mid-frequency bands from 1 GHz to 10 GHz, and high-frequency bands above 24 GHz (millimeter waves).

[0035] For clarity, the following description will focus primarily on LTE-A or 5G NR. However, the technical features of the embodiments according to this disclosure are not limited thereto.

[0036] For terms and techniques not specifically described in this specification, please refer to the wireless communication standard documents published prior to the submission of this specification.

[0037] Figure 1The structure of an NR system according to an embodiment of this disclosure is shown. Figure 1 The embodiments can be combined with various embodiments of this disclosure.

[0038] refer to Figure 1 The Next Generation Radio Access Network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol termination to UE 10. For example, BS 20 may include a Next Generation Node B (gNB) and / or an Evolved Node B (eNB). For example, UE 10 may be fixed or mobile and may be referred to by other terms such as mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), radio equipment, etc. For example, BS may be referred to as a fixed station communicating with UE 10 and may be referred to by other terms such as base transceiver system (BTS), access point (AP), etc.

[0039] Figure 1 The embodiment illustrates a case involving only the gNB. BS 20 can interconnect via the Xn interface. BS 20 can interconnect via the fifth-generation (5G) core network (5GC) and the NG interface. More specifically, BS 20 can connect to the Access and Mobility Management Function (AMF) 30 via the NG-C interface and can connect to the User Plane Function (UPF) 30 via the NG-U interface.

[0040] The radio interface protocol layer between the UE and the network can be classified into Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the well-known Open Systems Interconnection (OSI) model in communication systems. The Physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, while the Radio Resource Control (RRC) layer, located in Layer 3, controls the radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0041] Figure 2 A radio protocol architecture based on an embodiment of this disclosure is shown. Figure 2 The embodiments described herein can be combined with various embodiments of this disclosure. Specifically, Figure 2 (a) shows the radio protocol stack for the user plane used for Uu communication, and Figure 2 (b) shows the radio protocol stack for the control plane used for Uu communication. Figure 2 (c) shows the radio protocol stack for the user plane used for SL communication, and Figure 2 (d) in the diagram shows the radio protocol stack for the control plane used for SL communication.

[0042] refer to Figure 2The physical layer provides information transmission services to the upper layers through physical channels. The physical layer connects to the Media Access Control (MAC) layer, which is the upper layer, via transport channels. Data is transmitted between the MAC layer and the physical layer via transport channels. Transport channels are classified according to how data is transmitted through the radio interface and what characteristics of the data are transmitted.

[0043] Data is transmitted between different physical layers (i.e., the PHY layer of the transmitter and the PHY layer of the receiver) via a physical channel. The physical channel can be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and the physical channel uses time and frequency as radio resources.

[0044] The MAC layer provides services to the Radio Link Control (RLC) layer, which is a higher layer than the MAC layer, via logical channels. The MAC layer provides the ability to map multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data delivery services through logical channels.

[0045] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). To ensure the different Quality of Service (QoS) required by the Radio Bearer (RB), the RLC layer provides three types of operating modes: Transparent Mode (TM), Non-Acknowledgment Mode (UM), and Acknowledgment Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0046] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is used to control the configuration, reconfiguration, and release of logical, transport, and physical channels associated with RBs. RBs are logical paths for data delivery between the UE and the network, provided by Layer 1 (i.e., the Physical Layer or PHY Layer) and Layer 2 (i.e., the MAC Layer, RLC Layer, Packet Data Convergence Protocol (PDCP) Layer, and Serving Data Adaptation Protocol (SDAP) Layer).

[0047] The Packet Data Convergence Protocol (PDCP) in the user plane performs functions including user data delivery, header compression, and encryption. The Packet Data Convergence Protocol (PDCP) in the control plane performs functions including control plane data delivery and encryption / integrity protection.

[0048] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs the mapping between Quality of Service (QoS) streams and Data Radio Bearers (DRBs), as well as the QoS Stream ID (QFI) tagging in both DL and UL packets.

[0049] The configuration of an Radio Bearer (RB) refers to the processing used to specify the radio protocol layer and channel attributes to provide a specific service, as well as to determine the corresponding detailed parameters and operating methods. RBs can then be classified into two types: Signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs). SRBs are used as paths for transmitting RRC messages in the control plane. DRBs are used as paths for transmitting user data in the user plane.

[0050] When an RRC connection is established between the UE's RRC layer and the E-UTRAN's RRC layer, the UE is in the RRC connected (RRC_CONNECTED) state; otherwise, the UE can be in the RRC idle (RRC_IDLE) state. In the NR case, an additional RRC inactive (RRC_INACTIVE) state is defined, and a UE in the RRC_INACTIVE state can maintain its connection with the core network while releasing its connection with the BS.

[0051] Data is transmitted from the network to the UE via downlink transport channels. Examples of downlink transport channels include the Broadcast Channel (BCH) for transmitting system information and the Shared Downlink Channel (SCH) for transmitting user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services can be transmitted on the downlink SCH or on an additional downlink multicast channel (MCH). Furthermore, data is transmitted from the UE to the network via uplink transport channels. Examples of uplink transport channels include the Random Access Channel (RACH) for transmitting initial control messages and the Shared Uplink Channel (SCH) for transmitting user traffic or control messages.

[0052] Examples of logical channels that belong to a higher layer than the transport channel and are mapped to the transport channel may include broadcast channel (BCCH), paging control channel (PCCH), common control channel (CCCH), multicast control channel (MCCH), multicast traffic channel (MTCH), etc.

[0053] Figure 3 The structure of an NR radio frame according to an embodiment of this disclosure is shown. Figure 3 The embodiments can be combined with various embodiments of this disclosure.

[0054] refer to Figure 3 In NR, radio frames can be used to perform uplink and downlink transmissions. A radio frame is 10 ms long and can be defined as consisting of two half-frames (HF). A half-frame can include five 1 ms subframes (SF). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP).

[0055] With normal CP, each time slot can include 14 symbols. With extended CP, each time slot can include 12 symbols. In this paper, symbols can include OFDM symbols (or CP-OFDM symbols) and single-carrier-FDMA (SC-FDMA) symbols (or Discrete Fourier Transform Extended OFDM (DFT-s-OFDM) symbols).

[0056] Table 1 below shows the number of symbols (N) per slot based on the SCS configuration (u) under normal CP conditions. slot symb ), Number of time slots per frame (N) frame,u slot ) and the number of time slots per subframe (N) subframe,u slot ).

[0057] [Table 1]

[0058]

[0059]

[0060] Table 2 shows examples of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe, based on SCS, when using extended CP.

[0061] [Table 2]

[0062] 60kHz (u=2) 12 40 4

[0063] In NR systems, the OFDM(A) parameter sets (e.g., SCS, CP length, etc.) of multiple cells integrated into a UE can be configured differently. Therefore, the (absolute time) duration (or interval) of time resources (e.g., subframes, slots, or TTIs) consisting of the same number of symbols (collectively referred to as time units (TUs) for simplicity) can be configured differently in the integrated cells.

[0064] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wider carrier bandwidth can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0065] NR bands can be defined as two different types of frequency ranges. These two different types of frequency ranges can be FR1 and FR2. The values ​​of the frequency ranges can be changed (or varied), for example, the two different types of frequency ranges can be as shown in Table 3 below. In the frequency ranges used in NR systems, FR1 can mean "the range below 6 GHz," and FR2 can mean "the range above 6 GHz," and can also be referred to as millimeter wave (mmW).

[0066] [Table 3]

[0067] FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0068] As mentioned above, the frequency range values ​​in an NR system can be changed (or varied). For example, as shown in Table 4 below, FR1 can include a bandwidth ranging from 410 MHz to 7125 MHz. More specifically, FR1 can include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 can include unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes; for example, unlicensed frequency bands can be used for vehicle-specific communications (e.g., autonomous driving).

[0069] [Table 4]

[0070] FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0071] Figure 4 The structure of a time slot for an NR frame according to an embodiment of this disclosure is shown. Figure 4 The embodiments can be combined with various embodiments of this disclosure.

[0072] refer to Figure 4 A time slot comprises multiple symbols in the time domain. For example, in the case of normal CP, a time slot may include 14 symbols. In the case of extended CP, a time slot may include 12 symbols. Alternatively, in the case of normal CP, a time slot may include 7 symbols. However, in the case of extended CP, a time slot may include 6 symbols. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and the BWP may correspond to a set of parameters (e.g., SCS, CP length, etc.).

[0073] A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via an active BWP. Each element can be referred to as a resource element (RE) in the resource grid, and a complex symbol can be mapped to each element.

[0074] The bandwidth portion (BWP) and carrier will be described in detail below.

[0075] A BWP can be a contiguous set of Physical Resource Blocks (PRBs) within a given set of parameters. A PRB can be a contiguous set of Common Resource Blocks (CRBs) for a given set of parameters on a given carrier.

[0076] For example, a BWP can be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, a UE may not monitor downlink radio link quality in DL BWPs other than the active DL BWP on the primary cell (PCell). For example, a UE may not receive PDCCH, Physical Downlink Shared Channel (PDSCH), or Channel State Information-Reference Signal (CSI-RS) (excluding RRM) other than the active DL BWP. For example, a UE may not trigger Channel State Information (CSI) reports for inactive DL BWPs. For example, a UE may not transmit Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) other than the active UL BWP. For example, in the downlink case, the initial BWP can be given as a continuous set of RBs (configured by the Physical Broadcast Channel (PBCH)) for the Remaining Minimal System Information (RMSI) Control Resource Set (CORESET). For example, in the uplink case, the initial BWP can be given by the System Information Block (SIB) for the random access procedure. For example, a default BWP can be configured by a higher layer. For example, the initial value of the default BWP can be the initial DL BWP. To save energy, if the UE cannot detect downlink control information (DCI) during a specified period, the UE can switch its active BWP to the default BWP.

[0077] Furthermore, a BWP can be defined for an SL. The same SL BWP can be used for both transmission and reception. For example, a transmitting UE can transmit an SL channel or SL signal on a specific BWP, and a receiving UE can receive an SL channel or SL signal on a specific BWP. Within a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have separate configuration signaling from the Uu BWP. For example, a UE can receive configuration for an SL BWP from the BS / network. Similarly, a UE can receive configuration for a Uu BWP from the BS / network. For NR V2X UEs outside coverage and RRC_IDLE UEs, the SLBWP is (pre-)configured on the carrier. For UEs in RRC_CONNECTED mode, at least one SL BWP can be activated on the carrier.

[0078] Figure 5 An example of a BWP according to an embodiment of this disclosure is shown. Figure 5 The embodiments can be combined with various embodiments of this disclosure. It is assumed that in... Figure 5 In this embodiment, the number of BWPs is 3.

[0079] refer to Figure 5 A Common Resource Block (CRB) can be a carrier resource block numbered from one end of a carrier frequency band to the other. Alternatively, a Producer Resource Block (PRB) can be a resource block numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0080] It can be determined by point A and the offset (N) relative to point A. start BWP ) and bandwidth (N size BWP To configure the BWP, point A can be an external reference point for the PRB of a carrier, with subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) aligned at point A. For example, offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, bandwidth can be the number of PRBs in a given parameter set.

[0081] The following text will describe V2X or SL communication.

[0082] Sidelink synchronization signals (SLSS) can include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS) as SL-specific sequences. The PSSS can be referred to as the primary sidelink synchronization signal (S-PSS), and the SSSS can be referred to as the secondary sidelink synchronization signal (S-SSS). For example, a 127-character M-sequence can be used for the S-PSS, and a 127-character Gold sequence can be used for the S-SSS. For example, a UE can use the S-PSS for initial signal detection and synchronization acquisition. For example, a UE can use both the S-PSS and S-SSS for detailed synchronization acquisition and for detecting the synchronization signal ID.

[0083] The Physical Sidelink Broadcast Channel (PSBCH) can be a (broadcast) channel used to transmit default (system) information that the UE must know before SL signal transmission / reception. For example, the default information could be related to SLSS, duplex mode (DM), Time Division Duplex (TDD) uplink / downlink (UL / DL) configuration, resource pool information, and application types related to SLSS, subframe offset, and broadcast information. For instance, to evaluate PSBCH performance in NR V2X, the PSBCH payload size can be 56 bits, including 24 bits of Cyclic Redundancy Check (CRC).

[0084] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP lengths) as the Physical Sidelink Control Channel (PSCCH) / Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth can exist within a (pre-)configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. Additionally, the frequency location of the S-SSB can be (pre-)configured. Therefore, the UE does not need to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0085] Figure 6 The process of a UE performing V2X or SL communication based on a transmission mode according to an embodiment of this disclosure is illustrated. Figure 6 The embodiments described herein can be combined with various embodiments of this disclosure. In various embodiments of this disclosure, the transmission mode may be referred to as a mode or resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0086] For example, Figure 6 (a) illustrates UE operation associated with LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 6 (a) illustrates UE operations associated with NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to regular SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0087] For example, Figure 6 (b) illustrates UE operation associated with LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 6 (b) illustrates UE operations associated with NR resource allocation mode 2.

[0088] refer to Figure 6 In step (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station can schedule SL resources to be used by the UE for SL transmission. For example, in step S600, the base station can send information related to SL resources and / or information related to UL resources to the first UE. For example, UL resources may include PUCCH resources and / or PUSCH resources. For example, UL resources may be resources used to report SL HARQ feedback to the base station.

[0089] For example, the first UE can receive information related to Dynamic Grant (DG) resources and / or Configuration Grant (CG) resources from the base station. For example, CG resources may include CG Type 1 resources or CG Type 2 resources. In this disclosure, DG resources can be resources configured / assigned to the first UE by the base station via Downlink Control Information (DCI). In this disclosure, CG resources can be (periodic) resources configured / assigned to the first UE by the base station via DCI and / or RRC messages. For example, in the case of CG Type 1 resources, the base station can send an RRC message to the first UE including information related to the CG resources. For example, in the case of CG Type 2 resources, the base station can send an RRC message to the first UE including information related to the CG resources, and the base station can send a DCI related to the activation or release of the CG resources to the first UE.

[0090] In step S610, the first UE can send a PSCCH (e.g., Side Link Control Information (SCI) or Phase 1 SCI) to the second UE based on resource scheduling. In step S620, the first UE can send a PSSCH related to the PSCCH (e.g., Phase 2 SCI, MAC PDU, data, etc.) to the second UE. In step S630, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, it can receive HARQ feedback information (e.g., NACK or ACK information) from the second UE via the PSFCH. In step S640, the first UE can send / report HARQ feedback information to the base station via PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station can be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station can be information generated by the first UE based on pre-configured rules. For example, the DCI can be a DCI used for SL scheduling. For example, the DCI format can be DCI format 3_0 or DCI format 3_1.

[0091] refer to Figure 6 (b) In LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE can determine the SL transmission resource within the SL resources configured or pre-configured by the base station / network. For example, the configured or pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE can autonomously select resources within a selection window by performing a sensing process and a resource (re)selection process. For example, sensing can be performed on a sub-channel basis. For example, in step S610, the first UE, which has already selected resources from the resource pool, can send a PSCCH (e.g., Side Link Control Information (SCI) or Phase 1 SCI) to the second UE using that resource. In step S620, the first UE can send a PSSCH (e.g., Phase 2 SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S630, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0092] refer to Figure 6(a) or (b), for example, the first UE can send an SCI to the second UE via PSCCH. Alternatively, for example, the first UE can send two consecutive SCIs (e.g., a two-stage SCI) to the second UE via PSCCH and / or PSSCH. In this case, the second UE can decode the two consecutive SCIs (e.g., the two-stage SCI) to receive the PSSCH from the first UE. In this disclosure, an SCI sent via PSCCH may be referred to as the first SCI, the first SCI, the first-stage SCI, or the first-stage SCI format, and an SCI sent via PSSCH may be referred to as the second SCI, the second SCI, the second-stage SCI, or the second-stage SCI format. For example, the first-stage SCI format may include SCI format 1-A, and the second-stage SCI format may include SCI format 2-A and / or SCI format 2-B.

[0093] refer to Figure 6 In step (a) or (b), the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resource, and the second UE may use the PSFCH resource to send HARQ feedback to the first UE.

[0094] refer to Figure 6 In step S640, the first UE can send SLHARQ feedback to the base station via PUCCH and / or PUSCH.

[0095] Figure 7 Three broadcast types based on embodiments of this disclosure are shown. Figure 7 The embodiments can be combined with various embodiments of this disclosure. Specifically, Figure 7 (a) shows broadcast SL communication. Figure 7 (b) illustrates unicast SL communication, and Figure 7 (c) illustrates multicast SL communication. In the case of unicast SL communication, a UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, a UE can perform SL communication with one or more UEs in a group to which the UE belongs. In various embodiments of this disclosure, SL multicast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0096] In this specification, the phrase "configured or defined" can be interpreted as being (pre)configured from a base station or network (via predefined signaling (e.g., SIB, MAC signaling, RRC signaling)). For example, "if can be configured" could include "the base station or network (pre)configures / defines or notifies the UE." Alternatively, the phrase "configured or defined" can be interpreted as being configured or defined in advance by the system. For example, "if may be configured" could include "to be pre-configured / defined by the system."

[0097] On the other hand, UE power saving operations are not supported in NR V2X version 16, and UE power saving operations (e.g., power saving UE) are planned to be supported starting from NR V2X version 17.

[0098] In traditional NR resource allocation mode 2 operation, when multiple MAC PDUs need to be transmitted, the UE can perform resource reservation in multiple time periods. Furthermore, the UE can transmit a MAC PDU using one of the resources reserved for transmission for each MAC PDU in multiple time periods. The UE can also trigger preemption, congestion control, and UL / SL-based resource reselection to cancel the first selected resource (the initially selected resource is indicated in the SCI, and the SCI is sent to the receiving UE) and perform a resource reselection process. The UE can then send the reselected resource to the receiving UE by re-indicating the SCI. For example, if the receiving UE is an energy-efficient UE, although it is an energy-efficient UE, there may be a problem that it must operate during active hours because the receiving UE needs to receive not only the initial SCI sent by the transmitting UE (the SCI indicating the resource initially selected by the transmitting UE) but also the additional SCI (the SCI indicating the resource reselected by the transmitting UE).

[0099] Therefore, accordingly, in embodiments of this disclosure, a method for operating the SL DRX of a UE based on the UE type is proposed. In the following description, "when, if, in some case" can be replaced with "based on".

[0100] For example, P-UE described in this disclosure may refer to an energy-saving UE that performs energy-saving operations (e.g., SL DRX operations), and V-UE may refer to a vehicle UE that does not perform energy-saving operations.

[0101] Proposal 1. Operation method based on the type of packets received by the receiving UE (UE receiving SL data).

[0102] According to embodiments of this disclosure, when the SDU of the V-UE and the SDU of the P-UE are multiplexed together in a MAC PDU sent by the transmitting UE (the UE that transmits SL data) to the receiving UE (when the MAC PDU includes service data for the V-UE (e.g., PSID, ITS-AID, or destination L(Layer)2ID) and service data for the P-UE (e.g., PSID, ITS-AID, or destination L(Layer)2ID)), or when the transmitting UE has a destination L2 ID mapped to the service type (PSID, ITS-AID) for the P-UE and simultaneously mapped to the service type (PSID, ITS-AID) for the V-UE, the following operation of the transmitting UE is proposed.

[0103] According to embodiments of this disclosure, when the SDU of the V-UE and the SDU of the P-UE are multiplexed together in the MAC PDU sent by the transmitting UE to the receiving UE, resource reselection based on preemption, congestion control, and UL / SL priority (discarding the transmission with lower priority when UL and SL transmissions occur simultaneously; that is, sending data with higher priority first) can be prevented during the transmission of the MAC PDU or during the selection of transmission resources for transmitting the MAC PDU. In other words, since the SDU received by the P-UE is included in the SL data sent by the transmitting UE, this embodiment prevents resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority from being triggered, ensuring that the receiving UE does not perform additional SCI reception operations during the transmission of the MAC PDU or during the selection of transmission resources for transmitting the MAC PDU, which would reduce the energy-saving effect of the P-UE.

[0104] According to embodiments of this disclosure, when a MAC PDU sent by a transmitting UE to a receiving UE includes service data (e.g., PSID, ITS-AID, or destination L2 ID) for a V-UE and service data (e.g., PSID, ITS-AID, or destination L2 ID) for a P-UE, alternatively, when the transmitting UE has a destination L2 ID mapped to the service type (PSID, ITS-AID) for the P-UE and a destination L2 ID mapped to the service type (PSID, ITS-AID) for the V-UE, a method is proposed in which SL data (PSCCH / PSSCH) transmission is dropped at the transmission resource location indicated in a previous SCI before resource reselection is triggered, even if resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority is not triggered during the transmission of the MAC PDU by the transmitting UE or during the selection of transmission resources for transmitting the MAC PDU.

[0105] According to embodiments of this disclosure, when the SDU of the V-UE and the SDU of the P-UE are multiplexed together in the MAC PDU sent by the transmitting UE to the receiving UE (when the MAC PDU includes service data for the V-UE (e.g., PSID, ITS-AID, or destination L(Layer)2ID) and service data for the P-UE (e.g., PSID, ITS-AID, or destination L(Layer)2ID)), or when the transmitting UE has a destination L2 ID mapped to the service type (PSID, ITS-AID) for the P-UE and a destination L2 ID mapped to the service type (PSID, ITS-AID) for the V-UE, the following periodic resource reservation operation of the transmitting UE is proposed.

[0106] For example, in conventional NR V2X operation of version 16, the transmitting UE can perform periodic resource reservation operations as follows. For instance, when the transmitting UE performs transmission resource reservation, since the transmission of multiple MAC PDUs constituting the same TB requires 5 transmission resources, when the transmitting UE selects 5 transmission resources, these 5 transmission resources can be selected at the first resource selection time. Furthermore, for example, 5 transmission resources can be reserved using four SCIs as follows. For example, according to the current MAC operation, a maximum of 3 transmission resources can be reserved using one SCI, and 5 transmission resources can be reserved in the following chained format.

[0107] Reserved resources indicated in the first SCI: first resources for the first transmission, second resources for the second transmission, and third resources for the third transmission.

[0108] Reserved resources indicated in the second SCI: second resources for the second transmission, third resources for the third transmission, and fourth resources for the fourth transmission.

[0109] Reserved resources indicated in the third SCI: third resources for the third transmission, fourth resources for the fourth transmission, and final resources for the final (fifth) transmission.

[0110] Reserved resources indicated in the fourth SCI: fourth resources for the fourth transmission, and last resources for the final (fifth) transmission.

[0111] Reserved resources indicated in the fifth SCI: Last resources for the final (fifth) transmission.

[0112] In other words, for example, the operation of a transmitting UE reserving a transmission resource through the SCI is supported in traditional NR V2X transmitting UE operations. For example, periodic transmission resource reservation is supported by including resource reservation information and time period information in the SCI.

[0113] According to embodiments of this disclosure, a method is proposed that enables a transmitting UE to perform periodic transmission resource reservation at least during the operating period of the receiving UE's SL DRX enable duration timer. For example, the transmitting UE may also perform periodic transmission resource reservation during the active time within an SL DRX inactive period (excluding the portion of the SL DRX enable duration timer in the SL DRX cycle, i.e., the SL DRX disable duration), along with the SL DRX enable duration timer operating period, and may transmit only packets in which the expected receiving UE is a V-UE during the SL DRX inactive period. For example, when the expected receiving UE is a V-UE, the receiving UE checks the periodic transmission resource reservation information included in the SCI sent by the transmitting UE and can identify that SL data is being sent to it during the SL DRX inactive period.

[0114] According to embodiments of this disclosure, when only the SDU of the P-UE is multiplexed in the MAC PDU sent by the transmitting UE to the receiving UE (when the MAC PDU includes service data for the P-UE (e.g., PSID, ITS-AID, or destination L2 ID)), or when the transmitting UE has a destination L2 ID mapped with the service type (PSID, ITS-AID) for the P-UE, the following operation of the transmitting UE is proposed.

[0115] According to embodiments of this disclosure, when only the SDU of the P-UE is multiplexed in the MAC PDU sent by the transmitting UE to the receiving UE (when the MAC PDU includes service data for the P-UE (e.g., PSID, ITS-AID, or destination L2 ID)), or when the transmitting UE has a destination L2 ID mapped to the service type (PSID, ITS-AID) for the P-UE, the transmitting UE may not trigger resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority during the transmission of the MAC PDU or during the selection of transmission resources for transmitting the MAC PDU. That is, for example, because the SDU received only by the P-UE is included in the SL data sent by the transmitting UE to prevent the receiving UE from additionally receiving the SCI, which reduces the energy-saving effect of the P-UE, the resource reselection operation may not be triggered based on preemption, congestion control, and UL / SL (or SL / SL) priority during the transmission of the MAC PDU or during the selection of transmission resources for transmitting the MAC PDU.

[0116] According to embodiments of this disclosure, when only the SDU of the P-UE is multiplexed in the MAC PDU sent by the transmitting UE to the receiving UE (when the MAC PDU includes service data (e.g., PSID, ITS-AID, or destination L2 ID) for the P-UE), or when the transmitting UE has a destination L2 ID mapped with the service type (PSID, ITS-AID) for the P-UE, even if preemption, congestion control, and resource reselection based on UL / SL (or SL / SL) priority are not triggered during the transmission of the MAC PDU or during the selection of the transmission resources for transmitting the MAC PDU, a method is proposed to discard SL data (PSCCH / PSSCH) transmissions in the transmission resource location indicated in the previous SCI before resource reselection is triggered.

[0117] According to embodiments of this disclosure, the transmitting UE can cause periodic transmission resource reservation to be performed only during the SL DRX enable duration timer period of the receiving UE (P-UE). That is, for example, the receiving UE (P-UE) can be woken up only during the SL DRX enable duration period, and the transmitting UE can perform transmission resource reservation only during the SL DRX enable duration timer period.

[0118] Alternatively, for example, a method has been proposed in which the transmitting UE performs periodic transmission resource reservation at least during the operating period of the receiving UE's SL DRX enable duration timer. That is, for example, the transmitting UE can perform periodic transmission resource reservation during both the receiving UE's SL DRX inactivity period and the receiving UE's SL DRX enable duration, and the receiving UE (P-UE) can receive SL data transmitted by the transmitting UE even during its SL DRX inactivity period by waking up during the periodic transmission resource reservation period indicated by the transmitting UE.

[0119] According to embodiments of this disclosure, when only the V-UE's SDU is multiplexed in a MAC PDU sent by the transmitting UE to the receiving UE (when the MAC PDU includes service data for the V-UE (e.g., PSID, ITS-AID, or destination L2 ID)) or when the transmitting UE has a destination L2 ID mapped with a service type (PSID, ITS-AID) for the V-UE, resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority can be triggered during the transmitting UE's transmission of the MAC PDU or selection of transmission resources for transmitting the MAC PDU.

[0120] According to embodiments of this disclosure, when a transmitting UE performs resource selection based on partial sensing or random selection in an SL resource pool (e.g., a normal transmission pool), the transmitting UE can indicate that resource selection based on partial sensing or random selection is being performed (or is not being performed) via SCI.

[0121] For example, the receiving UE may consider the transmitting UE as an energy-efficient UE and not trigger resource reselection based on reassessment, preemption, congestion control, and UL / SL (or SL / SL) prioritization. Furthermore, during the transmission of a MAC PDU or the selection of transmission resources for transmitting the MAC PDU, when the receiving UE confirms that the SCI received from the transmitting UE instructs the transmitting UE to perform resource selection based on partial sensing or random selection, it can perform SL DRX operation. That is, for example, the receiving UE may determine that the transmitting UE will only transmit SL data within the resource portion reserved in the currently received SCI, and can wake up to receive SL data transmitted by the transmitting UE only within the resource portion reserved in the SCI. For example, the receiving UE can operate in sleep mode between multiple resource reservation intervals.

[0122] For example, when the receiving UE confirms that it is instructed in the SCI received from the transmitting UE not to perform resource selection based on partial sensing or random selection (i.e., to perform resource selection based on full sensing), the receiving UE can perform SL DRX operation during the process of the transmitting UE treating itself as a V-UE and transmitting a MAC PDU or during the process of selecting transmission resources for transmitting a MAC PDU, while assuming that reassessment, preemption and congestion control, and resource reselection based on UL / SL (or SL / SL) priority have been triggered. That is, for example, the receiving UE can assume that SL data transmission can be performed in the portion of the SCI currently received by the receiving UE other than the reserved resource portion, and can monitor the SCI indicating newly reserved transmission resources after the transmitting UE selects new transmission resources by operating in an active mode during specific time slots before and after the transmission resource reservation period indicated in the current SCI.

[0123] According to embodiments of this disclosure, when a UE multiplexes a MAC PDU and when an SDU is sent from the V2X layer to the AS layer, a method is proposed such that an identifier (which can distinguish whether it is an SDU for a P-UE or an SDU for a V-UE) is sent, making it possible to distinguish whether the MAC SDU multiplexed in the MAC PDU is a MAC SDU associated with a service (e.g., PSID, ITS-AID) for the P-UE or a MACSDU associated with a service (e.g., PSID, ITS-AID) for the V-UE. For example, the identifier is an SDU service type identifier, that is, the identifier is sent together when the SDU is sent from the V2X layer to the AS layer, and the identifier can be an identifier identifying the service type used for the SDU (service for the P-UE or service for the V-UE).

[0124] Alternatively, for example, by mapping the UE type (P-UE or V-UE) to an SL logical channel (SL LCH) or SL logical channel group (SL LCG), when the MAC layer performs Logical Channel Prioritization (LCP) operations for generating MAC PDUs, the LCH linked to the sidelink data (MAC SDU) and the mapped UE type (P-UE or V-UE) can be identified, and the MAC layer can determine whether the MAC SDU included in the MAC PDU is SL service data for P-UEs or SL service data for V-UEs. For example, the base station can transmit the SL logical channel (SL LCH) or SL logical channel group (SLLCG) and the mapped UE type (P-UE or V-UE) information to the UE via RRC messages or pre-configuration.

[0125] Figure 8An example is shown whereby a transmitting UE determines, based on a transmission profile, whether a receiving UE performs an SL DRX operation according to an embodiment of the present disclosure. Figure 8 The embodiments can be combined with various embodiments of this disclosure.

[0126] refer to Figure 8 This leads to the emergence of a transmitting UE comprising both a V2X layer and an AS layer. For example, the V2X layer can transmit the SDU and its associated TX profile to the AS layer. For instance, the TX profile may include information related to whether the UE receiving the SDU performs an SL DRX operation. For example, the AS layer of the transmitting UE can determine, based on the transmission profile, that the receiving UE receiving the SDU performs an SL DRX operation. Alternatively, the AS layer of the transmitting UE can determine, based on the transmission profile, that the receiving UE receiving the SDU does not perform an SL DRX operation.

[0127] Figure 9 An example is shown of a transmitting UE generating and transmitting a MAC PDU based on an SL DRX configuration according to an embodiment of the present disclosure. Figure 9 The embodiments can be combined with various embodiments of this disclosure.

[0128] refer to Figure 9 In step S910, the transmitting UE can determine whether the receiving UE performs SL DRX operation on the SDU. In step S920, the transmitting UE can generate a MAC PDU based on the SDU. In step S930, the transmitting UE can send the MAC PDU using multicast or broadcast methods. For example, the transmitting UE can send the MAC PDU to receiving UE 1 and receiving UE 2. In step S940, receiving UE 1 and receiving UE 2 can determine whether the MAC PDU is related to the service to be sent based on the L2 destination ID included in the received MAC PDU. In step S950, receiving UE 1 can determine based on the L2 destination ID that the MAC PDU is not related to its desired service and can discard the MAC PDU. Receiving UE 2 can determine based on the L2 destination ID that the MAC PDU is related to its desired service, and the MAC PDU can be passed from a lower layer of receiving UE 2 to a higher AS layer.

[0129] According to embodiments of this disclosure, a higher layer of the UE (e.g., the V2X layer) can pass L2 destination IDs associated with services (e.g., PSID, ITS-AID) for the P-UE (or V-UE) to the AS layer. Furthermore, for example, L2 destination ID table information mapped to services (e.g., PSID, ITS-AID) for the P-UE (or V-UE) can be pre-configured, and when the AS layer receives L2 destination IDs associated with services (e.g., PSID, ITS-AID) for the P-UE (or V-UE) from a higher layer (e.g., the V2X layer), the AS layer can distinguish whether the L2 destination ID received from the V2X layer based on the pre-configured table (a table mapped to L2 destination IDs for services (e.g., PSID, ITS-AID) for the P-UE) is an L2 destination ID for the P-UE service or an L2 destination ID for the V-UE service.

[0130] According to embodiments of this disclosure, when a higher layer of the UE (e.g., the V2X layer) transmits an L2 destination ID to the AS layer, a distinguishing identifier for the L2 destination ID—whether it is an L2 destination ID for the P-UE or a distinguishing identifier for the P-UE's L2 destination ID (e.g., a P-UE L2 destination ID indicator: for example, if the value is 0 -> the indicator indicates that the L2 destination ID transmitted by the V2X layer is an L2 destination ID that distinguishes whether the V-UE should receive SL data or SL services. If the value is 1 -> the indicator indicates that the L2 destination ID transmitted by the V2X layer is an L2 destination ID that distinguishes whether the P-UE should receive SL data or SL services)—can be transmitted.

[0131] For example, if the receiving UE (e.g., P-UE) is interested in receiving SL data for the P-UE, when the receiving UE receives the SL data sent by the sending UE and determines that the L2 destination ID of the SL data is the L2 destination ID for the V-UE, the MAC layer of the receiving UE can filter and discard the corresponding SL data (SL packet or SL PDU) and can not pass the corresponding SL data (SL packet or SL PDU) to the higher AS layer (RLC / PDCP layer).

[0132] Conversely, for example, if the receiving UE (e.g., P-UE) is interested in receiving SL data for the P-UE, when the receiving UE receives the SL data sent by the sending UE and determines that the L2 destination ID of the SL data is the L2 destination ID for the P-UE, the MAC layer of the receiving UE can pass the corresponding SL data (SL packet or SL PDU) to the higher AS layer (RLC / PDCP layer).

[0133] For example, when the transmitting UE includes a MAC SDU in the MAC PDU based on this, after determining whether the MAC SDU is for the P-UE or the V-UE (or, by checking the L2 destination ID during the generation of the MAC PDU (e.g., LCP) and after determining whether the MAC PDU is for the P-UE or the V-UE's SL data), the transmitting UE may determine whether to trigger resource reselection based on re-evaluation, preemption, congestion control, and UL / SL (or NRSL / LTE SL) prioritization.

[0134] For example, through (pre)configuration, whether the relevant SL data is the target of an energy-efficient UE (and / or an SL DRX-operated UE) can be configured according to priority (and / or PQI, and / or (L1 or L2) source (and / or destination) ID (pairs) and / or sensing type (e.g., partial sensing, full sensing, no sensing) and / or resource selection type (e.g., random resource selection, (partial or full) sensing-based resource selection)).

[0135] Proposal 2. Implement a method for operating the sending UE based on the UE type.

[0136] According to embodiments of this disclosure, when the UE type of the transmitting UE that transmits SL data is P-UE, during the process of transmitting MAC PDU or selecting transmission resources for transmitting MAC PDU, the transmitting UE may not trigger resource reselection based on re-evaluation, preemption and congestion control, and UL / SL (or SL / SL) priority.

[0137] In addition, for example, when the UE type of the UE transmitting SL data is V-UE, during the process of transmitting MAC PDU or selecting transmission resources for transmitting MAC PDU, the UE may trigger resource reselection based on reassessment, preemption and congestion control, and UL / SL (or SL / SL) priority.

[0138] According to embodiments of this disclosure, when a transmitting UE performs resource selection based on partial sensing or random selection in an SL resource pool (e.g., a normal transmission pool), resource reselection based on reassessment, preemption and congestion control, and UL / SL (or SL / SL) priority may not be triggered during the transmission of a MAC PDU by the transmitting UE or during the selection of transmission resources for transmitting a MAC PDU.

[0139] Furthermore, for example, when a transmitting UE performs resource selection based on partial sensing or random selection in an SL resource pool (e.g., a normal transmission pool), a method is proposed in which, even if preemption and congestion control and resource reselection based on UL / SL (or SL / SL) priority are not triggered, SL data (PSCCH / PSSCH) transmissions are dropped in the transmission resource location indicated in the previous SCI before resource reselection is triggered.

[0140] Furthermore, for example, when a transmitting UE performs pool-based resource selection from an SL resource pool (e.g., a normal transmission pool), resource reselection based on reassessment, preemption and congestion control, and UL / SL (or SL / SL) prioritization can be triggered during the transmission of a MAC PDU by the transmitting UE or during the selection of transmission resources for transmitting a MAC PDU.

[0141] Proposal 3 proposes a method whereby a transmitting UE operating in NR resource allocation mode 2 will not trigger resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) prioritization when the receiving UE is a P-UE (Power Saving UE) (or when the service type (PSID, ITS-AID) mapped to the transmitting UE's target L2 ID is the service type for a P-UE). For example, in conventional NR resource allocation mode 2 operation, when multiple MAC PDUs exist to be transmitted, the UE can perform resource reservations in multiple time periods. Furthermore, the transmitting UE can transmit a MAC PDU by using one of the resources reserved for transmission for each MAC PDU in multiple time periods.

[0142] When this disclosure (which proposes a method that prevents a sending UE operating in NR resource allocation mode 2 from triggering resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority when the receiving UE is a P-UE (or when the destination L2 ID service type (PSID, ITS-AID) mapped to the sending UE is a service type for a P-UE)) is applied to conventional NR resource allocation mode 2, the following operations can be performed.

[0143] According to embodiments of this disclosure, the plurality of MAC PDUs to be transmitted by the transmitting UE may include MAC PDUs in which the target receiving UE is a P-UE, and may also include MAC PDUs in which the target receiving UE is a V-UE (vehicle UE). For example, since the V-UE may be a UE that does not perform power-saving operation, and since the P-UE is a UE that performs power-saving operation, there may be differences in the reception operation of the SL MAC PDUs transmitted by the transmitting UE between the V-UE and the P-UE.

[0144] For example, during the resource selection process for the transmitting UE to send a MAC PDU to the P-UE, if resource reselection triggered based on reassessment, preemption, congestion control, and UL / SL (or SL / SL) priority is supported, the P-UE may not only have to receive the SCI containing resource information reserved for the initial MAC PDU transmission, but also the SCI containing resource information reselected due to resource reselection triggered by preemption, congestion control, and UL / SL (or SL / SL) priority. In other words, a P-UE performing SL DRX operation for energy saving may have to operate in an active state (if it is in sleep mode, it should switch to active mode to receive the SCI) in order to receive the SCI (which includes resource information reserved by the transmitting UE for the transmission of the first MAC PDU). In addition, there may be a problem when the transmitting UE sends an SCI to the P-UE, which includes information about resources that have been reselected by triggering resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority. In this problem, the P-UE needs to operate again during the active time (if the P-UE is in sleep mode, it must switch to active mode to receive the SCI) in order to receive the SCI.

[0145] Conversely, for example, since the V-UE does not support power-saving operation (i.e., always operates during active hours), the SCI sent by the transmitting UE can always be monitored. Therefore, since the V-UE is always present during active hours, the V-UE can receive SCIs without any problems, even if the transmitting UE triggers resource reselection based on reassessment, preemption and congestion control, and UL / SL (or SL / SL) prioritization to send SCIs that include the reselected resources.

[0146] Therefore, in this disclosure, to ensure the energy-saving gain of the P-UE, when the UE performing the receiving operation is a P-UE (energy-saving UE) (or when the service type (PSID, ITS-AID) mapped to the destination L2 ID of the transmitting UE is the service type used for the P-UE), the transmitting UE operating in NR resource allocation mode 2 can prevent resource reselection based on preemption, congestion control, and UL / SL priority from being triggered during the transmission of the MAC PDU or during the selection of transmission resources for transmitting the MAC PDU. That is, for example, the resources selected / reserved in connection with the transmitting UE transmitting the MAC PDU of the P-UE to the target can be resources in which resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority is not performed.

[0147] For example, the method proposed in this disclosure can be extended to be equally applicable even when the relative receiving UE of the transmitting UE is a V-UE.

[0148] Furthermore, for example, when the receiving UE of the transmitting UE includes both V-UE and P-UE (when V-UE and P-UE are included in the receiving UE as the destination of multiple MAC PDUs transmitted by the transmitting UE, or when the MAC PDU includes both service (e.g., PSID, ITS-AID, or destination L2 ID) data for V-UE and service (e.g., PSID, ITS-AID, or destination L2 ID) data for P-UE, or when the transmitting UE has a destination L2 ID mapped with the service type (PSID, ITS-AID) for P-UE and simultaneously mapped with the service type (PSID, ITS-AID) for V-UE), the transmitting UE operating in NR resource allocation mode 2 may not trigger resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority. For example, the resources selected / reserved in relation to the MAC PDU sent by the transmitting UE to the target P-UE may be resources in which resource reselection based on preemption, congestion control, and UL / SL prioritization is not performed.

[0149] Alternatively, for example, when the receiving UE of the transmitting UE includes both V-UE and P-UE (when V-UE and P-UE are included in the receiving UE as the destination of multiple MAC PDUs transmitted by the transmitting UE, or when the MAC PDU includes both service (e.g., PSID, ITS-AID, or destination L2 ID) data for V-UE and service (e.g., PSID, ITS-AID, or destination L2 ID) data for P-UE, or when the transmitting UE has a destination L2 ID mapped to the service type (PSID, ITS-AID) for P-UE and simultaneously mapped to the service type (PSID, ITS-AID) for V-UE), the transmitting UE operating in NR resource allocation mode 2 can trigger resource reselection based on preemption, congestion control, and UL / SL (or SL / SL) priority and send the reselected resources to the receiving UE (P-UE and V-UE) via SCI, so that the receiving UE can use the resources reselected by the transmitting UE.

[0150] Proposal 4. According to the proposals of this disclosure, resource reselection may be performed based on preemption, congestion control, and UL / SL priority (when UL and SL transmissions occur simultaneously, operations with lower transmission priority are discarded; that is, operations with higher priority data in the transmission data are sent first). This is done based on the UE type of the sending UE (P-UE or V-UE) or the service type (PSID, ITS-AID, or destination L2 ID) of the SL data transmitted from the sending UE, or based on the UE type of the receiving UE (P-UE or V-UE), during the transmission of a MAC PDU or during the selection of transmission resources for transmitting a MAC PDU. (Alternatively, SL / SL priority is used to determine whether to perform resource reselection during the transmission of a MAC PDU or during the selection of transmission resources for transmitting a MAC PDU.) For example, to support the measures proposed above, a method is proposed for a base station to partition the SL resource pool and allocate the SL resource pool to a resource pool for P-UE (e.g., a resource pool that does not support preemption operation) or a resource pool for V-UE (e.g., a resource pool that supports preemption operation) by using the following dedicated RRC message, system information block (SIB) or pre-configured parameters.

[0151] [Table 5]

[0152]

[0153] According to embodiments of this disclosure, when a UE receives an SL resource pool allocated by a base station and the sl-PreemptionEnable value is set to disabled, the UE can regard the resource pool as a resource pool for P-UE, or when the sl-PreemptionEnable value is set to enabled, the UE can regard the resource pool as a resource pool for V-UE.

[0154] Alternatively, for example, the resource pools for P-UE and V-UE can be explicitly partitioned and allocated as follows.

[0155] [Table 6]

[0156]

[0157] [Table 7]

[0158]

[0159] For example, in Proposals 1, 2, and 3 above, when it is determined that the UE will not perform preemption, the UE can select and use a resource pool in which sl-preemptionenable is set to disabled, and when it is determined that the UE will perform preemption, the UE can select and use a resource pool in which sl-preemptionenable is set to enabled.

[0160] Alternatively, for example, in proposals 1, 2, and 3 above, when it is determined that the UE will not perform preemption, the UE may choose to use P-UE_SL-resourcepool (e.g., sl-preemptionenable is set to disabled), and when it is determined that the UE will perform preemption, the UE may choose to use V-UE_SL-resourcepool (e.g., sl-preemptionenable is set to enabled).

[0161] The following SL DRX configurations and SL DRX timers mentioned in this disclosure can be used for the following purposes.

[0162] [Table 8]

[0163]

[0164] SL DRX Start Duration Timer: It can indicate a period of time during which the UE performing SL DRX operation should essentially operate as an active time in order to receive PSCCH / PSSCH from the other UE.

[0165] SL DRX Inactivity Timer: This timer indicates a period during which the UE performing SL DRX operation extends the SL DRX enable duration. This period is the time during which the active time is essentially required to receive PSCCH / PSSCH from the other UE. In other words, the SL DRX enable duration timer can be extended by the SL DRX inactivity timer period. Furthermore, when the UE receives a new packet (new PSSCH transmission) from the other UE, the UE can extend the SL DRX enable duration timer by activating the SL DRX inactivity timer.

[0166] SL DRX HARQ RTT Timer: This timer indicates a period during which a UE performing SL DRX operations operates in sleep mode until it receives a retransmission packet (or PSSCH allocation) from another UE. In other words, when a UE starts the SL DRX HARQ RTT timer, it can determine that other UEs will not send sidelink retransmission packets to it until the timer expires, and can operate in sleep mode while the timer is running.

[0167] SL DRX Retransmission Timer: This timer indicates the period during which a UE performing SL DRX operations is active for receiving retransmission packets (or PSSCH allocations) sent by the other UE. During the corresponding timer period, the UE can monitor the reception of retransmission sidelink packets (or PSSCH allocations) sent by the other UE.

[0168] For example, in the following description, the names of the timers (SL DRX Start Duration Timer, SL DRX Inactive Timer, SL DRX HARQ RTT Timer, SL DRX Retransmission Timer, etc.) are exemplary, and timers that perform the same / similar function based on the description of each timer can be considered as the same / similar timers, regardless of their names.

[0169] For example, the proposals in this disclosure are solutions that can be applied and expanded as a method to address the problem of losses caused by interference occurring during Uu bandwidth portion (BWP) handover.

[0170] Furthermore, for example, the solution can be applied and extended as a method to address the loss caused by interference during SL BWP handover when the UE supports SL multi-BWP (bandwidth portion).

[0171] For example, in addition to parameters (and timers) included in the default / common SL DRX configuration or default / common SL DRX mode or default / common SL DRX configuration, the proposals of this disclosure can be extended and applied to parameters (and timers) included in the UE's specific SL DRX configuration or UE's specific SL DRX mode or UE's specific SL DRX configuration, etc.

[0172] Furthermore, for example, the term "on duration" mentioned in the proposals of this disclosure can be extended and interpreted as an active time interval, and the term "off duration" can be extended and interpreted as a sleep time interval. For example, active time can refer to the period during which the UE operates in a wake-up state (RF module on) to receive / transmit wireless signals. For example, sleep time can refer to the period during which the UE operates in a sleep mode state (RF module off) to conserve energy. For example, sleep time does not mean that the transmitting UE must operate in sleep mode. That is, if necessary, even during the sleep period, the UE may be allowed to perform sensing / transmission operations for a short time during the active time.

[0173] Furthermore, for example, depending on the resource pool, congestion level, service priority (and / or type), requirements (e.g., latency, reliability), service type (e.g., (non)periodic generation), SL transport resource allocation mode (mode 1, mode 2), etc., whether the methods / rules (part of) proposed in this disclosure are applied and / or related parameters (e.g., thresholds) can be specifically (or differently, or independently) configured.

[0174] For example, for resource pools, service / packet types (and / or priorities), QoS requirements (e.g., URLLC / EMBB services, reliability, latency), broadcast types (e.g., unicast, multicast, broadcast), (resource pool) congestion levels (e.g., CBR), SLHARQ feedback methods (e.g., NACK feedback only, ACK / NACK feedback), MAC PDU transmissions with HARQ feedback enabled (and / or MAC PDUs with HARQ feedback disabled), whether PUCCH-based SL HARQ feedback reporting operations are configured, preemption (and / or re-evaluation) execution (or resource reselection based on preemption), (L2 or L1) (source and / or destination) identifiers, (L2 or L1) (combination of resource layer ID and destination layer ID) identifiers, (L2 or L1) (combination of resource layer ID, destination layer ID, and broadcast type) identifiers, resource layer ID and destination layer ID pairings, PC5 RRC connections / links, SL mode type (resource allocation mode 1, when SL... At least one of the following scenarios: when DRX is executed, resource allocation mode 2), (non-)periodic resource reservation is executed, whether the rules proposed in this disclosure are applied (and / or related parameter settings) can be specifically (and / or independently, and / or differently).

[0175] For example, the term "specific time" mentioned in the proposal of this disclosure may indicate the time during which the UE operates as an active time for a predefined time for receiving sidelink signals or sidelink data from the other UE, or as an active time for a time that is as long as the time or a specific timer (SL DRX retransmission timer, SL DRX inactive timer, or timer guaranteed to be used as an active time in the DRX operation of the receiving UE).

[0176] Additionally, for example, the proposals and proposed rules of this disclosure, whether applied (and / or related parameter settings), can also be applied to millimeter-wave SL operations.

[0177] According to embodiments of this disclosure, the transmitting UE can know whether the receiving UE has performed an SL DRX operation, and when the transmitting UE transmits an SDU during the active time of the SL DRX configuration associated with the SL DRX operation, the receiving UE can receive the SDU without omission.

[0178] Figure 10 The process of a first device performing wireless communication according to an embodiment of the present disclosure is illustrated. Figure 10 The embodiments can be combined with various embodiments of this disclosure.

[0179] refer to Figure 10In step S1010, the first device performing wireless communication can obtain at least one sidelink SL discontinuous reception DRX configuration. In step S1020, the first device can obtain information regarding whether the SL DRX operation of the second device receiving services related to the Service Data Unit (SDU) is enabled, as well as the SDU. In step S1030, the first device can determine whether the second device performs SL DRX operation for services related to the SDU based on the information related to whether the SL DRX operation is enabled, indicating that the second device's SL DRX operation is enabled. In step S1040, the first device can determine the SL DRX configuration in at least one SL DRX configuration based on the Quality of Service (QoS) requirements related to the SDU. In step S1050, the first device can generate a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU. In step S1060, the first device can send a MAC PDU to the second device during the active time of the SL DRX configuration. For example, the SL DRX configuration may include information related to the SL DRX period and information about a timer related to the active time.

[0180] For example, the operation of obtaining information and SDU related to whether SL DRX operation is enabled may include: receiving information and SDU related to whether SL DRX operation is enabled from a higher layer.

[0181] For example, information and SDUs related to whether SL DRX operation is enabled can be received by the access layer AS layer of the first device.

[0182] For example, a higher layer could be the vehicle-to-everything V2X layer.

[0183] For example, information related to whether SL DRX operation is enabled may include a mapping between the logical channel LCH on which SDUs are received and the enabling of SL DRX operation of the second device.

[0184] For example, the first device can also receive the mapping relationship from the base station via Radio Resource Control (RRC) messages.

[0185] For example, the mapping relationship can be pre-configured for the first device.

[0186] For example, information related to whether SL DRX operation is enabled may include the Layer 2 (L2) Destination Identifier ID associated with the service related to the SDU.

[0187] For example, information related to whether SL DRX operation is enabled may include information indicating whether the L2 destination ID indicates that SL DRX operation is enabled for the second device.

[0188] For example, an SDU could be an SDU associated with multicast or broadcast.

[0189] For example, services related to SDU may include at least one of Vendor Service Identifier (PSID) or Intelligent Transport System Application Identifier (ITS-AID).

[0190] For example, based on information related to whether SL DRX operation is enabled, indicating that SL DRX operation is enabled on the second device, a MAC PDU can be transmitted from the second device to a higher layer.

[0191] For example, higher layers may include at least one of an RLC layer or a PDCP layer.

[0192] The above embodiments can be applied to various apparatuses described below. For example, the processor 102 of the first device 100 can obtain at least one sidelink discontinuous reception DRX configuration. Furthermore, the processor 102 of the first device 100 can obtain information related to whether SL DRX operation is enabled for the second device 200 receiving services associated with a Service Data Unit (SDU), and the SDU. Furthermore, the processor 102 of the first device 100 can determine that the second device 200 performs SLDRX operation for services associated with the SDU based on information indicating that the second device's SL DRX operation is enabled. Furthermore, the processor 102 of the first device 100 can determine the SL DRX configuration in at least one SL DRX configuration based on QoS requirements associated with the SDU. Furthermore, the processor 102 of the first device 100 can generate a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU. Furthermore, the processor 102 of the first device 100 can control the transceiver 106 to send the MAC PDU to the second device 200 during the active period of the SL DRX configuration. For example, the SL DRX configuration may include information related to the SL DRX cycle and information about timers related to active time.

[0193] According to embodiments of this disclosure, a first device for performing wireless communication can be proposed. For example, the first device may include: 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. For example, the one or more processors may execute instructions to: obtain at least one sidelink discontinuous reception (SL) DRX configuration; obtain information regarding whether SL DRX operation is enabled for a second device receiving services related to a Service Data Unit (SDU), and the SDU; determine that the second device performs SL DRX operation for services related to the SDU based on the information indicating that the second device's SL DRX operation is enabled; determine the SL DRX configuration within the at least one SL DRX configuration based on the Quality of Service (QoS) requirements related to the SDU; generate a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU; and send a MAC PDU to the second device during the active time of the SL DRX configuration, wherein the SL DRX configuration includes information related to the SL DRX period and information about a timer related to the active time.

[0194] According to embodiments of this disclosure, an apparatus adapted to control a first user equipment (UE) can be proposed. For example, the apparatus may include: one or more processors; and one or more memories operatively connected to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to: obtain at least one sidelink discontinuous reception (SL) DRX configuration; obtain information regarding whether SL DRX operation for a second UE receiving services related to a Service Data Unit (SDU) is enabled, and an SDU; determine that the second UE performs SL DRX operation for services related to the SDU based on information indicating whether SL DRX operation is enabled, indicating that SL DRX operation for the second UE is enabled; determine the SL DRX configuration within the at least one SL DRX configuration based on QoS requirements related to the SDU; generate a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU; and send a MACPDU to the second UE during the active time of the SL DRX configuration, wherein the SL DRX configuration includes information related to the SL DRX period and information about a timer related to the active time.

[0195] According to embodiments of this disclosure, a non-transitory computer-readable storage medium storing instructions can be provided. For example, when executed, the instructions can cause a first device to: obtain at least one sidelink SL discontinuous reception DRX configuration; and obtain information regarding whether SL DRX operation for receiving services related to Service Data Units (SDUs) is enabled for a second device, and an SDU; based on the information regarding whether SL DRX operation is enabled, indicating that SL DRX operation is enabled for the second device, determine that the second device performs SL DRX operation for services related to the SDU; based on the Quality of Service (QoS) requirements related to the SDU, determine one of the at least one SL DRX configurations; generate a Media Access Control (MAC) Protocol Data Unit (PDU) based on the SDU; and send a MAC PDU to the second device during the active period of the SL DRX configuration, wherein the SL DRX configuration includes information related to the SL DRX period and information regarding a timer related to the active period.

[0196] Figure 11 The process of a second device performing wireless communication according to an embodiment of the present disclosure is illustrated. Figure 11 The embodiments can be combined with various embodiments of this disclosure.

[0197] refer to Figure 11 In step S1110, the second device performing wireless communication can determine the service to be received. In step S1120, the second device can obtain the service-related sidelink discontinuous reception (SL) DRX configuration. In step S1130, the second device can receive Media Access Control (MAC) Protocol Data Unit (PDU) and the Layer 2 (L2) Destination Identifier (ID) associated with the MAC PDU from the first device based on the active time of the SL DRX configuration. For example, the MAC PDU can be generated by the first device based on the service data unit (SDU) associated with the service. For example, the SL DRX configuration can be determined in at least one SL DRX configuration based on the Quality of Service (QoS) requirements associated with the SDU. For example, the MAC PDU and L2 Destination ID can be sent from the first device based on the active time of the SL DRX configuration. For example, the SL DRX configuration can include information related to the SL DRX period and information about timers related to the active time.

[0198] For example, the operation of receiving a MAC PDU and an L2 destination ID associated with the MAC PDU from a first device based on the active time configured by SL DRX may include: receiving the MAC PDU and the L2 destination ID associated with the MAC PDU; determining whether the L2 destination ID is associated with a service; and transmitting the MAC PDU to the access layer AS layer based on whether the L2 destination ID is associated with a service.

[0199] The above embodiments can be applied to various devices described below. For example, the processor 202 of the second device 200 can determine the service to be received. Furthermore, the processor 202 of the second device 200 can obtain the service-related sidelink discontinuous reception DRX configuration. Also, the processor 202 of the second device 200 can control the transceiver 206 to receive Media Access Control (MAC) Protocol Data Units (PDUs) and Layer 2 (L2) Destination Identifiers (IDs) associated with the MAC PDUs from the first device based on the active time of the SL DRX configuration. For example, the MAC PDUs can be generated by the first device based on the service data units (SDUs) associated with the service. For example, the SL DRX configuration can be determined in at least one SL DRX configuration based on the Quality of Service (QoS) requirements associated with the SDUs. For example, the MAC PDUs and L2 Destination Identifiers (IDs) can be sent from the first device based on the active time of the SL DRX configuration. For example, the SL DRX configuration can include information related to the SL DRX period and information about timers related to the active time.

[0200] According to embodiments of this disclosure, a second device for performing wireless communication can be proposed. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to one or more memories and one or more transceivers. For example, the one or more processors may execute instructions to: determine a service to be received; obtain a service-related sidelink (SL) discontinuous reception (DRX) configuration; and receive a Media Access Control (MAC) Protocol Data Unit (PDU) and a Layer 2 (L2) Destination Identifier (ID) associated with the MAC PDU from a first device based on the active time of the SL DRX configuration, wherein the MAC PDU is generated by the first device based on the service-related Service Data Unit (SDU), wherein the SL DRX configuration is determined in at least one SL DRX configuration based on the Quality of Service (QoS) requirements associated with the SDU, wherein the MAC PDU and L2 Destination Identifier (ID) are transmitted from the first device based on the active time of the SL DRX configuration, and wherein the SL DRX configuration includes information related to the SL DRX period and information about a timer related to the active time.

[0201] For example, the operation of receiving a MAC PDU and an L2 destination ID associated with the MAC PDU from a first device based on the active time configured by SL DRX may include: receiving the MAC PDU and the L2 destination ID associated with the MAC PDU; determining whether the L2 destination ID is associated with a service; and transmitting the MAC PDU to the access layer AS layer based on whether the L2 destination ID is associated with a service.

[0202] The various embodiments disclosed herein can be combined with each other.

[0203] In the following, devices to which the respective embodiments of this disclosure may be applied will be described.

[0204] The various descriptions, functions, processes, proposals, methods and / or operating procedures described in this document can be applied to, but are not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0205] The following description will be given in more detail with reference to the accompanying drawings. In the following drawings / description, unless otherwise described, the same reference numerals may denote the same or corresponding hardware blocks, software blocks, or functional blocks.

[0206] Figure 12 A communication system (1) according to an embodiment of the present disclosure is shown. Figure 12 The embodiments can be combined with various embodiments of this disclosure.

[0207] Reference Figure 12 The communication system (1) applying various embodiments of this disclosure includes wireless devices, base stations (BS), and networks. Hereinafter, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include, but are not limited to, robots (100a), vehicles (100b-1, 100b-2), extended reality (XR) devices (100c), handheld devices (100d), home appliances (100e), Internet of Things (IoT) devices (100f), and artificial intelligence (AI) devices / servers (400). For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Hereinafter, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices can include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and can take the form of head-up displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices can include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances can include TVs, refrigerators, and washing machines. IoT devices can include sensors and smart meters. For example, the BS and network can be implemented as wireless devices, and a particular wireless device (200a) can operate as a BS / network node relative to other wireless devices.

[0208] In addition to LTE, NR, and 6G, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may also include narrowband Internet of Things (IoT) for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide-area network (LPWAN) technology and may be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the names mentioned above. Alternatively or additionally, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine-type communication (eMTC). For example, LTE-M technology may be implemented as at least one of various standards such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine-type communication, and / or 7) LTE M, and is not limited to the names mentioned above. Alternatively or concurrently, the wireless communication technologies implemented in the wireless devices 100a to 100f of this disclosure may include at least one of Bluetooth, Low Power Wide Area Network (LPWAN), and ZigBee, which takes into account low power communication, and are not limited to the names mentioned above. As an example, ZigBee technology may generate personal area networks (PANs) related to low / low power digital communication based on various standards including IEEE 802.15.4, and may be referred to by various names.

[0209] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0210] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS200 / BS 200. Here, the wireless communication / connection can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, access backhaul integration (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed based on various proposals of this disclosure.

[0211] Figure 13 A wireless device according to an embodiment of the present disclosure is shown. Figure 13 The embodiments can be combined with various embodiments of this disclosure.

[0212] Reference Figure 13 The first wireless device (100) and the second wireless device (200) can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {the first wireless device (100) and the second wireless device (200)} can correspond to... Figure 12 {Wireless Device (100x) and BS (200)} and / or {Wireless Device (100x) and Wireless Device (100x)}.

[0213] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information relating to the operation of the processors 102. For example, one or more memories 104 may store software code including commands for performing part or all of the processing controlled by one or more processors 102, or for performing the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. Here, one or more processors 102 and one or more memories 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). One or more transceivers 106 may be connected to one or more processors 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. One or more transceivers 106 may be used interchangeably with one or more radio frequency (RF) units. In this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0214] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third message / signal, and subsequently transmit a radio signal including the third message / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth message / signal via the transceivers 106, and then store the information obtained by processing the fourth message / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, one or more memories 204 may store software code including commands for performing part or all of the processing controlled by one or more processors 202, or for performing the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document. Here, one or more processors 202 and one or more memories 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). One or more transceivers 206 may be connected to one or more processors 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. One or more transceivers 206 may be used interchangeably with one or more RF units. In this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0215] The hardware components of wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented, but are not limited to, by one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and acquire PDUs, SDUs, messages, control information, data, or information in accordance with the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0216] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and such firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to perform the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0217] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0218] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operating procedures of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational procedures disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert the processed user data, control information, radio signals / channels, etc., from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0219] Figure 14 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 14 The embodiments can be combined with various embodiments of this disclosure.

[0220] Reference Figure 14 The signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a pre-encoder (1040), a resource mapper (1050), and a signal generator (1060). It can perform... Figure 14 Operations / functions, but not limited to Figure 13The processors (102, 202) and / or transceivers (106, 206) can be used. Figure 13 Implemented by processors (102, 202) and / or transceivers (106, 206) Figure 14 Hardware components. For example, it can be achieved through... Figure 13 The processors (102, 202) implement boxes 1010 to 1060. Alternatively, they can be implemented using... Figure 13 The processors (102, 202) implement boxes 1010 to 1050, and can be used to... Figure 13 The transceivers (106, 206) are used to implement the frame 1060.

[0221] Can be via Figure 14 The signal processing circuit (1000) converts codewords into radio signals. In this document, a codeword is a sequence of encoded bits for an information block. The information block may include transport blocks (e.g., UL-SCH transport blocks, DL-SCH transport blocks). Radio signals can be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0222] Specifically, the codeword can be converted into a scrambled bit sequence by scrambler 1010. The scrambling sequence used for scrambling can be generated based on an initial value, which may include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by layer mapper 1030. The modulation symbols of each transmission layer can be mapped (pre-coded) to one or more corresponding antenna ports by pre-encoder 1040. The output z of pre-encoder 1040 can be obtained by multiplying the output y of layer mapper 1030 by an N*M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transmission layers. Pre-encoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0223] Resource mapper 1050 maps modulation symbols for each antenna port to time-frequency resources. Time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. Signal generator 1060 can generate radio signals from the mapped modulation symbols, and the generated radio signals can be transmitted to other devices via each antenna. For this purpose, signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0224] Can be with Figure 14 The signal processing procedures (1010-1060) are configured in the reverse manner for the signal processing procedures used to receive signals in a wireless device. For example, a wireless device (e.g., Figure 13 The receiver (e.g., 100, 200) can receive radio signals from the outside via the antenna port / transceiver. The received radio signals can be converted into baseband signals using a signal recovery unit. For this purpose, the signal recovery unit may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Next, the baseband signals can be recovered into codewords through a resource demapping process, a post-encoding process, a demodulation processor, and a descrambling process. The codewords can be recovered into the original information blocks through decoding. Therefore, the signal processing circuitry (not illustrated) used for receiving signals may include a signal recovery unit, a resource demapping unit, a post-encoder, a demodulator, a descrambler, and a decoder.

[0225] Figure 15 Another example of a wireless device according to an embodiment of this disclosure is shown. The wireless device can be implemented in various forms depending on the use case / service (see reference). Figure 12 ). Figure 15 The embodiments can be combined with various embodiments of this disclosure.

[0226] Reference Figure 15 Wireless devices (100, 200) can correspond to Figure 13 The wireless devices (100, 200) can be configured using various elements, components, units / parts and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional components (140). The communication unit may include a communication circuit (112) and one or more transceivers (114). For example, the communication circuit (112) may include... Figure 13 One or more processors (102, 202) and / or one or more memories (104, 204). For example, transceiver (114) may include one or more transceivers. Figure 13The device comprises one or more transceivers (106, 206) and / or one or more antennas (108, 208). The control unit (120) is electrically connected to the communication unit (110), memory (130), and add-on components (140), and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in the memory unit (130). The control unit (120) may transmit information stored in the memory unit (130) to an external source (e.g., another communication device) via the communication unit (110) through a wireless / wired interface, or store information received from an external source (e.g., another communication device) via the communication unit (110) through a wireless / wired interface in the memory unit (130).

[0227] The add-on component (140) can be configured in various ways depending on the type of wireless device. For example, the add-on component (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be implemented in, but is not limited to, the following forms: robot ( Figure 12 100a), vehicles ( Figure 12 100b-1 and 100b-2), XR equipment ( Figure 12 100c), handheld devices ( Figure 12 100d), home appliances ( Figure 12 100e), IoT devices ( Figure 12 100f), digital broadcasting terminals, hologram devices, public safety equipment, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 12 400), BS ( Figure 12 (e.g., 200), network nodes, etc. Depending on the use case / service, wireless devices can be used in mobile or fixed locations.

[0228] exist Figure 15In the wireless devices (100, 200), all various elements, components, units / parts, and / or modules can be connected to each other via wired interfaces, or at least partially via communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected via a wired connection, and the control unit (120) and the first unit (e.g., 130, 140) can be wirelessly connected via the communication unit (110). Each element, component, unit / part, and / or module within the wireless devices (100, 200) may also include one or more elements. For example, the control unit (120) may be constructed from a collection of one or more processors. As an example, the control unit (120) may be constructed from a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory (130) can be constructed using random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory and / or combinations thereof.

[0229] The implementation will be described in detail below with reference to the accompanying drawings. Figure 15 Examples.

[0230] Figure 16 A handheld device according to an embodiment of the present disclosure is illustrated. The handheld device may include a smartphone, smartpad, wearable device (e.g., a smartwatch or smart glasses), or portable computer (e.g., a laptop). The handheld device may be referred to as a mobile station (MS), user terminal (UT), mobile subscriber station (MSS), subscriber station (SS), advanced mobile station (AMS), or wireless terminal (WT). Figure 16 The embodiments can be combined with various embodiments of this disclosure.

[0231] Reference Figure 16 The handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an I / O unit (140c). The antenna unit (108) may be configured as part of the communication unit (110). Boxes 110 to 130 / 140a to 140c correspond to respectively Figure 15 The frame is 110 to 130 / 140.

[0232] Communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. Control unit 120 can perform various operations by controlling the constituent elements of handheld device 100. Control unit 120 may include an application processor (AP). Memory unit 130 can store data / parameters / programs / codes / commands required to drive handheld device 100. Memory unit 130 can store input / output data / information. Power supply unit 140a can supply power to handheld device 100 and includes wired / wireless charging circuitry, a battery, etc. Interface unit 140b can support connection of handheld device 100 to other external devices. Interface unit 140b may include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. I / O unit 140c may include a camera, microphone, user input unit, display unit 140d, speaker, and / or haptic module.

[0233] For example, in the case of data communication, I / O unit 140c can acquire user input information / signals (e.g., touch, text, voice, image, or video), and the acquired information / signals can be stored in memory unit 130. Communication unit 110 can convert the information / signals stored in memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. Communication unit 110 can receive radio signals from other wireless devices or the BS, and then recover the received radio signals into the original information / signals. The recovered information / signals can be stored in memory unit 130 and can be output in various types (e.g., text, voice, image, video, or haptic feedback) through I / O unit 140.

[0234] Figure 17 A vehicle or autonomous vehicle according to an embodiment of this disclosure is shown. The vehicle or autonomous vehicle can be implemented by mobile robots, cars, trains, manned / unmanned aerial vehicles (AVs), ships, etc. Figure 17 The embodiments can be combined with various embodiments of this disclosure.

[0235] Reference Figure 17 The vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a drive unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as part of the communication unit (110). Boxes 110 / 130 / 140a to 140d correspond to respectively Figure 15The frame size is 110 / 130 / 140.

[0236] Communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BS (e.g., gNB and roadside units), and servers. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include electronic control unit (ECU). Drive unit 140a can cause the vehicle or autonomous vehicle 100 to move on the road. Drive unit 140a may include engine, motor, transmission system, wheels, brakes, steering equipment, etc. Power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuitry, batteries, etc. Sensor unit 140c can acquire vehicle status, external environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, humidity sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle's lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a defined path, and technologies for automatically setting a route when a destination is set, etc.

[0237] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate autonomous driving paths and driving plans from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire the latest traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0238] The claims in this specification can be combined in various ways. For example, technical features in the method claims of this specification can be combined to implement or perform in a device, and technical features in the device claims can be combined to implement or perform in a method. Additionally, technical features in one or more method claims and one or more device claims can be combined to implement or perform in a device.

Claims

1. A method for performing wireless communication by a first device, the method comprising: Obtain the destination ID and information related to the DRX configuration for discontinuous reception of at least one sidelink SL; Obtain information regarding whether the SL DRX operation for the second device to receive Media Access Control (MAC) Protocol Data Units (PDUs) associated with the destination ID is enabled; Based on information related to whether the SL DRX operation is enabled, it is determined that the second device performs the first SL DRX operation; Based on the Quality of Service (QoS) requirements associated with the MAC PDU, determine the SL DRX configuration among the at least one SL DRX configuration; The first sidelink control information (SCI) for scheduling the physical sidelink shared channel (PSSCH) is sent to the second device via the physical sidelink control channel (PSCCH) during the active time configured in the SL DRX. as well as The MAC PDU and a second SCI including the destination ID are sent to the second device via the PSSCH during the active period. The SL DRX configuration includes information related to the SL DRX cycle and information about timers related to the active time.

2. The method according to claim 1, wherein, Obtaining information related to whether SL DRX operation is enabled and the destination ID includes: Receive information from a higher layer regarding whether SL DRX operation is enabled and the destination ID.

3. The method according to claim 2, wherein, Information related to whether SL DRX operation is enabled and the destination ID are received by the access layer AS layer of the first device.

4. The method according to claim 2, wherein, The higher layer is the vehicle-to-everything V2X layer.

5. The method according to claim 2, wherein, Information related to whether SL DRX operation is enabled includes the mapping relationship between the logical channel LCH associated with the destination ID and the enabling of SL DRX operation of the second device.

6. The method of claim 5, further comprising: The mapping relationship is received from the base station via Radio Resource Control (RRC) messages.

7. The method according to claim 5, wherein, The mapping relationship is pre-configured for the first device.

8. The method according to claim 1, wherein, Information related to whether SL DRX operation is enabled is obtained based on the destination ID.

9. The method according to claim 1, wherein, The destination ID is associated with multicast or broadcast.

10. The method according to claim 1, wherein, Information related to whether SL DRX operation is enabled includes at least one of the following: Supplier Service Identifier (PSID) or Intelligent Transport System Application Identifier (ITS-AID).

11. The method according to claim 1, wherein, Based on information related to whether SL DRX operation is enabled, it is indicated that SL DRX operation of the second device is enabled, and the MAC PDU is transmitted from the second device to a higher layer.

12. The method according to claim 11, wherein, The higher layers include at least one of an RLC layer or a PDCP layer.

13. A first device for performing wireless communication, the first device comprising: One or more memories, wherein the one or more memories store instructions; One or more transceivers; as well as One or more processors are connected to one or more memories and one or more transceivers, wherein the one or more processors execute the instructions to: Obtain the destination ID and information related to the DRX configuration for discontinuous reception of at least one sidelink SL; Obtain information related to whether the SLDRX operation of the Media Access Control (MAC) Protocol Data Unit (PDU) associated with the destination ID is enabled by the second device; Based on information related to whether the SL DRX operation is enabled, it is determined that the second device performs the first SL DRX operation; Based on the Quality of Service (QoS) requirements associated with the MAC PDU, determine the SL DRX configuration among the at least one SL DRX configuration; The first sidelink control information (SCI) for scheduling the physical sidelink shared channel (PSSCH) is sent to the second device via the physical sidelink control channel (PSCCH) during the active time configured in the SL DRX. as well as The MAC PDU and a second SCI including the destination ID are sent to the second device via the PSSCH during the active period. The SL DRX configuration includes information related to the SL DRX cycle and information about timers related to the active time.

14. An apparatus adapted to control a first user equipment (UE), the apparatus comprising: One or more processors; as well as One or more memories, operatively connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to: Obtain the destination ID and information related to the DRX configuration for discontinuous reception of at least one sidelink SL; Obtain information related to whether the SLDRX operation of the Media Access Control (MAC) Protocol Data Unit (PDU) associated with the destination ID is enabled for the second UE; Based on information related to whether the SL DRX operation is enabled, it is determined that the second UE performs the first SL DRX operation; Based on the Quality of Service (QoS) requirements associated with the MAC PDU, determine the SL DRX configuration among the at least one SL DRX configuration; The Physical Side Link Control Channel (PSCCH) is used to send the first side link control information (SCI) for scheduling the Physical Side Link Shared Channel (PSSCH) to the second UE during the active time configured in the SL DRX. as well as The MAC PDU and a second SCI including the destination ID are sent to the second UE via the PSSCH during the active period. The SL DRX configuration includes information related to the SL DRX cycle and information about timers related to the active time.

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