Method and apparatus for supporting continuous slot-based transmissions between different user equipments in unlicensed band

Abstract

A method of operation of a first apparatus (100) in a wireless communication system is presented. The operating method may comprise the steps of: receiving, from a second device (200), information related to resource selection for a plurality of resources for MCSt; including a first resource among a plurality of resources by selecting the first resource based on the information; sending an SCI for scheduling the PSSCH through the PSCCH based on the first resource; and transmitting the MAC PDU through the PSSCH on the basis of the first resource.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system. Background Art

[0002] A sidelink (SL) refers to a communication method in which a direct link is configured between user equipments (UEs), and voice or data is directly exchanged between the UEs without passing through a base station (BS). Considering SL as a solution to the burden on the BS caused by the rapid increase in data traffic. Vehicle-to-Everything (V2X) refers to a communication technology that exchanges information with other vehicles, pedestrians, objects equipped with infrastructure, etc. through wired / wireless communication. V2X can be classified into four types: Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), Vehicle-to-Network (V2N), and Vehicle-to-Pedestrian (V2P). V2X communication can be provided through a PC5 interface and / or a Uu interface.

[0003] In addition, since a wider range of communication devices requires a greater communication capacity, the demand for enhanced mobile broadband communication compared to existing radio access technologies (RAT) is increasing. Therefore, services and user equipments that are sensitive to reliability and latency have been discussed. In addition, next-generation radio access technologies based on enhanced mobile broadband communication, massive machine type communication (MTC), ultra-reliable low-latency communication (URLLC), etc. can be referred to as new radio access technologies (RAT) or new radio (NR). Summary of the Invention

[0004] Technical Solution

[0005] According to an embodiment of the present disclosure, a method for a first device to perform wireless communication can be proposed. For example, the method may include the following steps: receiving information related to resource selection for a plurality of resources for multi-continuous slot transmission (MCSt) from a second device; including the first resource in the plurality of resources by selecting the first resource based on the information; sending sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH) based on the first resource; and sending a media access control (MAC) protocol data unit (PDU) through the PSSCH based on the first resource, where the MCSt may include the transmission of the MAC PDU, and where the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0006] According to an embodiment of the present disclosure, a first device for performing wireless communication can be provided. For example, the first device can include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions, the instructions, when executed by the at least one processor, causing the first device to perform operations. For example, the operations can include: receiving, from a second device, information related to resource selection for a plurality of resources for multi-consecutive time slot transmission (MCSt); including the first resource in the plurality of resources by selecting the first resource based on the information; sending, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH); and sending, based on the first resource, a media access control (MAC) protocol data unit (PDU) through the PSSCH, where the MCSt can include the transmission of the MAC PDU, and where the interval between the plurality of resources can be less than or equal to 16 microseconds.

[0007] According to an embodiment of the present disclosure, a device adapted to control a first user equipment (UE) can be provided. For example, the device can include: at least one processor; and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions, the instructions, when executed by the at least one processor, causing the first UE to perform operations. For example, the operations can include: receiving, from a second UE, information related to resource selection for a plurality of resources for multi-consecutive time slot transmission (MCSt); including the first resource in the plurality of resources by selecting the first resource based on the information; sending, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH); and sending, based on the first resource, a media access control (MAC) protocol data unit (PDU) through the PSSCH, where the MCSt can include the transmission of the MAC PDU, and where the interval between the plurality of resources can be less than or equal to 16 microseconds.

[0008] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions, which when executed cause a first device to: receive, from a second device, information related to resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt); include a first resource in the plurality of resources by selecting the first resource based on the information; transmit sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH) based on the first resource; and transmit a media access control (MAC) protocol data unit (PDU) through the PSSCH based on the first resource, wherein the MCSt may include transmission of the MAC PDU, and wherein an interval between the plurality of resources may be less than or equal to 16 microseconds.

[0009] According to one embodiment of the present disclosure, a method for performing wireless communication by a second device may be provided. For example, the method may include the steps of: sending, to a first device, information related to resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt); wherein the first device may include a first resource in the plurality of resources based on the information, wherein, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) may be transmitted through a physical sidelink control channel (PSCCH), wherein, based on the first resource, a media access control (MAC) protocol data unit (PDU) may be transmitted through the PSSCH, wherein the MCSt may include transmission of the MAC PDU, and wherein an interval between the plurality of resources may be less than or equal to 16 microseconds.

[0010] According to one embodiment of the present disclosure, a second device for performing wireless communication can be proposed. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform operations. For example, the operations may include: sending information related to resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt) to a first device; wherein, the first device may include a first resource in the plurality of resources based on the information, wherein, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) may be sent through a physical sidelink control channel (PSCCH), wherein, based on the first resource, a media access control (MAC) protocol data unit (PDU) may be sent through the PSSCH, wherein, the MCSt may include transmission of the MAC PDU, and wherein, the interval between the plurality of resources may be less than or equal to 16 microseconds. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. 6 shows a communication structure that may be provided in a 6G system according to one embodiment of the present disclosure.

[0012] Figure 2 FIG. 10 shows an electromagnetic spectrum according to one embodiment of the present disclosure.

[0013] Figure 3 FIG. 14 shows the structure of an NR system according to an embodiment of the present disclosure.

[0014] Figure 4 FIG. 18 shows a radio protocol architecture according to an embodiment of the present disclosure.

[0015] Figure 5 FIG. 22 shows the structure of a radio frame of NR according to an embodiment of the present disclosure.

[0016] Figure 6 FIG. 26 shows the slot structure of an NR frame according to an embodiment of the present disclosure.

[0017] Figure 7 FIG. 30 shows an example of a BWP according to an embodiment of the present disclosure.

[0018] Figure 8 FIG. 34 shows a process in which a UE performs V2X or SL communication according to a transmission mode according to an embodiment of the present disclosure.

[0019] Figure 9Shows three broadcast types according to an embodiment of the present disclosure.

[0020] Figure 10 Shows an example of a wireless communication system supporting an unlicensed band according to an embodiment of the present disclosure.

[0021] Figure 11 Shows a method of occupying resources in an unlicensed band based on an embodiment of the present disclosure.

[0022] Figure 12 Shows a case where multiple LBT-SBs are included in an unlicensed band based on an embodiment of the present disclosure.

[0023] Figure 13 Shows a CAP operation performed by a base station to transmit a downlink signal through an unlicensed band based on an embodiment of the present disclosure.

[0024] Figure 14 Shows a type 1 CAP operation performed by a UE to transmit an uplink signal based on an embodiment of the present disclosure.

[0025] Figure 15 Shows a method by which a UE having reserved transmission resources notifies another UE of the transmission resources based on an embodiment of the present disclosure.

[0026] Figure 16 Shows the resource configuration of MCSt when a coordination device schedules MCSt resources according to an embodiment of the present disclosure.

[0027] Figure 17 Shows the resource configuration when forming MCSt resources based on ID set information and an ID according to an embodiment of the present disclosure.

[0028] Figure 18 Shows the process of a first device performing wireless communication according to an embodiment of the present disclosure.

[0029] Figure 19 Shows the process of a second device performing wireless communication according to an embodiment of the present disclosure.

[0030] Figure 20 Shows communication system 1 based on an embodiment of the present disclosure.

[0031] Figure 21 Shows a wireless device according to an embodiment of the present disclosure.

[0032] Figure 22 Shows a signal processing circuit for transmitting a signal according to an embodiment of the present disclosure.

[0033] Figure 23Shows another example of a wireless device according to an embodiment of the present disclosure.

[0034] Figure 24 Shows a handheld device according to an embodiment of the present disclosure.

[0035] Figure 25 Shows a vehicle or autonomous vehicle according to an embodiment of the present disclosure. Detailed Description

[0036] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B, or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0037] In the present disclosure, the slash ( / ) or comma used may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0038] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". Additionally, in the present disclosure, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0039] Furthermore, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". Additionally, "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".

[0040] Moreover, the parentheses used in the present disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean presenting "PDCCH" as an example of "control information". In other words, the "control information" in the present disclosure is not limited to "PDCCH", and "PDDCH" may be presented as an example of "control information". Specifically, when indicated as "control information (i.e., PDCCH)", this may also mean presenting "PDCCH" as an example of "control information".

[0041] In the following description, "when, if, or in the case of" may be replaced by "based on".

[0042] The technical features separately described in one of the drawings in the present disclosure may be implemented separately or may be implemented simultaneously.

[0043] In this disclosure, higher layer parameters may be parameters configured, pre-configured, or predefined for a UE. For example, a base station or network may send higher layer parameters to the UE. For example, the higher layer parameters may be sent via Radio Resource Control (RRC) signaling or Medium Access Control (MAC) signaling.

[0044] The techniques described below may 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), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. CDMA may be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA may be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for IEEE 802.16e-based systems. UTRA is part of Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of the Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. Long Term Evolution-Advanced (LTE-A) is an evolution of LTE.

[0045] 5G NR is a follow-on technology to LTE-A corresponding to a new and novel mobile communication system with characteristics such as high performance, low latency, high availability, etc. 5G NR may use resources of all available spectrums including low frequency bands below 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequencies (millimeter waves) above 24 GHz.

[0046] The 6G (wireless communication) system aims to (i) achieve very high data rates per device, (ii) support a very large number of connected devices, (iii) provide global connectivity, (iv) offer very low latency, (v) consume less energy for battery - less IoT devices, (vi) ensure ultra - reliable connectivity, and (vii) enable connected intelligence with machine - learning capabilities. The vision of the 6G system can be embodied in four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can meet the requirements as shown in Table 1 below. In other words, Table 1 is an example of the requirements of the 6G system.

[0047] [Table 1]

[0048] Peak data rate per device 1 Tbps E2E latency 1 ms Maximum spectral efficiency 100 bps / Hz Mobility support Up to 1000 km / hr Satellite integration Fully AI Fully Autonomous vehicles Fully XR Fully Tactile communication Fully

[0049] The 6G system can have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra - reliable low - latency communication), mMTC (massive machine - type communication), AI - integrated communication, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0050] Figure 1 A communication structure that can be provided in a 6G system according to an embodiment of the present disclosure is shown. Figure 1 Embodiments can be combined with various embodiments of the present disclosure.

[0051] It is expected that the 6G system will have 50 times higher simultaneous radio connectivity than 5G radio systems. URLLC (a key feature of 5G) will become an even more dominant technology in 6G communication by providing an end - to - end latency of less than 1 ms. In the 6G system, instead of the area spectral efficiency often used today, the volume spectral efficiency will be better. The 6G system will be able to provide very long battery life and advanced battery technologies for energy harvesting, so in the 6G system, mobile devices will not need to be charged separately. In 6G, new network characteristics can be as follows.

[0052] - Satellite - integrated network: To provide global mobile coverage, 6G is expected to be integrated with satellites. Integrating terrestrial, satellite, and airborne networks into a single wireless communication system is important for 6G.

[0053] - Connected intelligence: Different from previous generations of wireless communication systems, 6G is revolutionary, and the wireless evolution will update from "connecting things" to "connecting intelligence". AI can be applied to every step of the communication process (or every step of signal processing, as will be described later).

[0054] - Seamless integration of wireless information and energy transfer: 6G wireless networks will deliver electricity to charge the batteries of devices such as smartphones and sensors. Thus, wireless information and energy transfer (WIET) will be integrated.

[0055] - Ubiquitous super 3D connectivity: Super 3D connectivity will generate access network and core network functions to drones and very low Earth orbit satellites from 6G ubiquity.

[0056] Given the above new network characteristics of 6G, some common requirements can be as follows

[0057] - Small cell networks: The concept of small cell networks has been introduced in cellular systems to improve the received signal quality due to increased processing throughput, energy efficiency, and spectral efficiency. Thus, small cell networks are a fundamental feature of 5G and beyond 5G (5GB) communication systems. Therefore, 6G communication systems will also adopt the characteristics of small cell networks.

[0058] - Ultra-dense heterogeneous networks: Ultra-dense heterogeneous networks will be another important feature of 6G communication systems. A multi-layer network composed of heterogeneous networks will improve the overall QoS and reduce costs.

[0059] - High-capacity backhaul: Backhaul connections are characterized by high-capacity backhaul networks to support a large amount of traffic. High-speed optical fibers and free space optical (FSO) systems can be possible solutions to this problem.

[0060] - Radar technology integrated with mobile technology: High-precision positioning (or location-based services) through communication is one of the characteristics of 6G wireless communication systems. Thus, radar systems will be integrated with 6G networks.

[0061] - Softwareization and virtualization: Softwareization and virtualization are two important features essential for the design process in 5GB networks to ensure flexibility, reconfigurability, and programmability. Additionally, billions of devices can be shared on a shared physical infrastructure.

[0062] The core implementation technologies for 6G systems are described below.

[0063] - Artificial Intelligence: The most important and latest technology to be introduced in the 6G system is AI. The 4G system does not involve AI. The 5G system will support partial or very limited AI. However, the 6G system will fully enable AI for automation. In 6G, the progress of machine learning will create more intelligent networks for real-time communication. Introducing AI in telecommunications can simplify and improve real-time data transmission. AI can use many analyses to determine the way to perform complex target operations, which means that AI can improve efficiency and reduce processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be completed immediately by using AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine communications. Additionally, AI can become fast communication in the brain-computer interface (BCI). The AI-based communication system can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0064] - THz Communication (Terahertz Communication): The data rate can be increased by increasing the bandwidth. This can be achieved by using sub-THz communication with a wide bandwidth and applying advanced massive MIMO technology. THz waves (also known as submillimeter radiation) refer to the frequency band between 0.1 THz and 10 THz, where the corresponding wavelength is usually in the range of 0.03 mm to 3 mm. The 100 GHz - 300 GHz frequency band range (sub-THz band) is considered the main part of the THz band for cellular communication. Adding the sub-THz band to the millimeter-wave band increases the capacity of 6G cellular communication. The 300 GHz - 3 THz in the defined THz band is in the far-infrared (IR) band. The 300 GHz - 3 THz band is part of the optical band, but it is on the boundary of the optical band, just behind the RF band. Therefore, the 300 GHz - 3 THz band exhibits similarities to RF. Figure 2 An electromagnetic spectrum according to an embodiment of the present disclosure is shown. Figure 2 Embodiments can be combined with various embodiments of the present disclosure. The key features of THz communication include (i) a widely available bandwidth that supports very high data rates, and (ii) high path loss at high frequencies (for which high-directional antennas are indispensable). The narrow beamwidth generated by high-directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array technologies that can overcome range limitations.

[0065] - Massive MIMO

[0066] - HBF, Holographic Beamforming

[0067] - Optical Wireless Technology

[0068] - FSO Backhaul Network

[0069] - Non-Terrestrial Network, NTN

[0070] - Quantum Communication

[0071] - Cell-Free Communication

[0072] - Integration of Wireless Information and Power Transfer

[0073] - Integration of Wireless Communication and Sensing

[0074] - Integrated Access and Backhaul Network

[0075] - Big Data Analytics

[0076] - Reconfigurable Intelligent Surface

[0077] - Metaverse

[0078] - Blockchain

[0079] - UAV, Unmanned Aerial Vehicle: Unmanned Aerial Vehicles (UAVs) or drones will be an important part of 6G wireless communication. In most cases, UAV technology is used to provide high-speed wireless data connections. The BS entity is installed on the UAV to provide cellular connectivity. UAVs have specific characteristics not found in fixed BS infrastructure (e.g., easy deployment, strong line-of-sight links, and freedom of controlled mobility). During emergencies such as natural disasters, the deployment of ground communication infrastructure is economically unfeasible and sometimes cannot provide services in a volatile environment. UAVs can easily handle these situations. UAVs will be a new paradigm in wireless communication. This technology contributes to the three basic requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support many other purposes such as enhanced network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, accident monitoring, etc. Therefore, UAV technology is considered one of the most important technologies for 6G communication.

[0080] -Autonomous driving: For perfect autonomous driving, vehicles must communicate with each other to notify each other of dangerous situations, or communicate with infrastructure such as parking lots and traffic lights to check information such as location and signal change time of parking information. Vehicle-to-everything (V2X), a key element in building an autonomous driving infrastructure, is a technology that allows vehicles to communicate with various elements on the road and share information to perform autonomous driving (e.g., vehicle-to-vehicle (V2V) wireless communication and vehicle-to-infrastructure (V2I) wireless communication). To maximize the performance of autonomous driving and ensure high safety, fast transmission speed and low latency technologies are necessary. Additionally, in the future, autonomous driving will go beyond delivering warning or guidance messages to the driver to actively intervene in vehicle operation and directly control the vehicle in dangerous situations, so the amount of information to be sent and received will be large, and 6G is expected to maximize autonomous driving with a faster transmission speed and lower latency than 5G.

[0081] For clarity, the description focuses on 5G NR, but the technical concept of one embodiment of the present disclosure is not limited thereto. Various embodiments of the present disclosure can also be applied to 6G communication systems.

[0082] Figure 3 The structure of an NR system based on an embodiment of the present disclosure is shown. Figure 3 Embodiments of can be combined with various embodiments of the present disclosure.

[0083] Referring to Figure 3 , the next-generation radio access network (NG-RAN) may include a BS20 that provides user plane and control plane protocol termination to the UE 10. For example, the BS20 may include a next-generation node B (gNB) and / or an evolved node B (eNB). For example, the 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), wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to by other terms such as base transceiver system (BTS), access point (AP), etc.

[0084] Figure 3 Embodiments of illustrate only the case including only gNBs. The BS20s may be interconnected via the Xn interface. The BS20s may be interconnected via the fifth-generation (5G) core network (5GC) and the NG interface. More specifically, the BS20 may be connected to the access and mobility management function (AMF) 30 via the NG-C interface and may be connected to the user plane function (UPF) 30 via the NG-U interface.

[0085] The radio interface protocol layers between the UE and the network can be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the well-known Open Systems Interconnection (OSI) model in a communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transmission service using physical channels, and the radio resource control (RRC) layer located in the third layer controls the radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0086] Figure 4 Fig. shows a radio protocol architecture according to an embodiment of the present disclosure. Figure 4 The embodiments of... can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) in... shows a radio protocol stack of a user plane for Uu communication, and Figure 4 (b) in... shows a radio protocol stack of a control plane for Uu communication. Figure 4 (c) in... shows a radio protocol stack of a user plane for SL communication, and Figure 4 (d) in... shows a radio protocol stack of a control plane for SL communication.

[0087] Referring to Figure 4 , the physical layer provides an information transfer service to the upper layer through physical channels. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through a transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how data is transmitted through the radio interface and what characteristics of the data are transmitted.

[0088] Data is transferred through physical channels between different physical layers (i.e., the PHY layer of the transmitter and the PHY layer of the receiver). 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.

[0089] The MAC layer provides a service to the radio link control (RLC) layer via a logical channel, which is the upper layer of the MAC layer. The MAC layer provides the function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides the function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides a data transmission service through logical channels.

[0090] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure different quality of service (QoS) required by radio bearers (RBs), the RLC layer provides three types of operation modes, namely, transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction via automatic repeat request (ARQ).

[0091] The radio resource control (RRC) layer is defined only in the control plane. The RRC layer is used to control the logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of RBs. An RB is a logical path provided by the first layer (i.e., the physical layer or PHY layer) and the second layer (i.e., the MAC layer, RLC layer, packet data convergence protocol (PDCP) layer, and service data adaptation protocol (SDAP) layer) for data transfer between the UE and the network.

[0092] The functions of the packet data convergence protocol (PDCP) in the user plane include the transmission of user data, header compression, and encryption. The functions of the packet data convergence protocol (PDCP) in the control plane include the transmission of control plane data and encryption / integrity protection.

[0093] 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) flows and data radio bearers (DRBs) and the QoS flow ID (QFI) marking in both DL packets and UL packets.

[0094] The configuration of an RB refers to the process of specifying radio protocol layer and channel attributes to provide a specific service and determining the corresponding detailed parameters and operation methods. An RB can then be classified into two types, namely, signaling radio bearer (SRB) and data radio bearer (DRB). An SRB is used as a path for sending RRC messages in the control plane, and a DRB is used as a path for sending user data in the user plane.

[0095] When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state; otherwise, the UE can be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTRIVE) state is additionally defined, and a UE in the RRC_INACTRIVE state can maintain its connection with the core network while releasing its connection with the BS.

[0096] The downlink transport channels for sending (or transmitting) data from the network to the UE include the broadcast channel (BCH) for sending system information and the downlink shared channel (SCH) for sending other user services or control messages. The services or control messages for downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, the uplink transport channels for sending (or transmitting) data from the UE to the network include the random access channel (RACH) for sending initial control messages and the uplink shared channel (SCH) for sending other user services or control messages.

[0097] Examples of logical channels that belong to the higher layer of the transport channel and are mapped to the transport channel can include the broadcast control channel (BCCH), the paging control channel (PCCH), the common control channel (CCCH), the multicast control channel (MCCH), the multicast traffic channel (MTCH), etc.

[0098] Figure 5 The structure of the radio frame of NR according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of can be combined with various embodiments of the present disclosure.

[0099] Refer to Figure 5 , in NR, the radio frame can be used to perform uplink and downlink transmissions. The length of the radio frame is 10 ms and can be defined as being composed of two half-frames (HF). A half-frame can include five 1-ms sub-frames (SF). A sub-frame (SF) can be divided into one or more time slots, and the number of time slots within a sub-frame can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP).

[0100] In the case of using normal CP, each time slot can include 14 symbols. In the case of using extended CP, each time slot can include 12 symbols. Herein, the symbols can include OFDM symbols (or CP-OFDM symbols) and single-carrier FDMA (SC-FDMA) symbols (or discrete Fourier transform spread OFDM (DFT-s-OFDM) symbols).

[0101] Table 2 below shows the number of symbols per time slot (N slot symb ), the number of time slots per frame (N frame,μ slot ), and the number of time slots per sub-frame (N subframe,μ slot ) according to the SCS configuration (u) when using normal CP or extended CP.

[0102] [Table 2]

[0103]

[0104]

[0105] In the NR system, the OFDM(A) parameter sets (e.g., SCS, CP length, etc.) among multiple cells integrated into a UE can be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., subframe, slot, or TTI) (collectively referred to as a time unit (TU) for simplicity) composed of the same number of symbols can be configured differently in the integrated cells.

[0106] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, when the SCS is 15 kHz, a wide range of traditional cellular bands can be supported, and when the SCS is 30 kHz / 60 kHz, dense urban areas, lower latency, and wider carrier bandwidth can be supported. When the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz can be used to overcome phase noise.

[0107] NR frequency bands can be defined as two different types of frequency ranges. The two different types of frequency ranges can be FR1 and FR2. The values of the frequency ranges can change (or vary), for example, the two different types of frequency ranges can be as shown in Table 3 below. Among the frequency ranges used in the NR system, 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).

[0108] [Table 3]

[0109] Frequency range designation Corresponding frequency range Subcarrier spacing (SCS) FR1 450 MHz – 6000 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0110] As described above, the values of the frequency ranges in the NR system can change (or vary). For example, as shown in Table 4 below, FR1 can include bandwidths in the range of 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.) included in FR1 can include unlicensed frequency bands. The unlicensed frequency bands can be used for various purposes, for example, the unlicensed frequency bands are used for vehicle-specific communications (e.g., autonomous driving).

[0111] [Table 4]

[0112] Frequency range designation Corresponding frequency range Subcarrier spacing (SCS) FR1 410 MHz – 7125 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0113] Figure 6Shows the structure of a time slot of an NR frame according to an embodiment of the present disclosure. Figure 6 Embodiments of Figure 6 can be combined with various embodiments of the present disclosure.

[0114] Referring to Figure 6 , a time slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. However, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols. A carrier includes a plurality of subcarriers in the frequency domain. A resource block (RB) can be defined as a plurality of consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as a plurality of consecutive (physical) resource blocks ((P)RB) in the frequency domain, and the BWP can correspond to a parameter set (e.g., SCS, CP length, etc.).

[0115] 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 a resource grid, and one complex symbol can be mapped to each element.

[0116] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0117] A BWP can be a continuous set of physical resource blocks (PRBs) within a given parameter set. The PRBs can be selected from a continuous subset of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0118] For example, the BWP can be at least any one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in DL BWPs other than the active DL BWP on the primary cell (PCell). For example, the UE may not receive a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) outside the active DL BWP. For example, the UE may not trigger a channel state information (CSI) report for an inactive DL BWP. For example, the UE may not transmit a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) outside the active UL BWP. For example, in the case of the downlink, the initial BWP can be given as a set of consecutive resource blocks (RBs) for the remaining minimum system information (RMSI) control resource set (CORESET) (configured by the physical broadcast channel (PBCH)). For example, in the case of the uplink, the initial BWP can be given by a system information block (SIB) for the random access procedure. For example, the default BWP can be configured by a higher layer. For example, the initial value of the default BWP can be the initial DL BWP. For energy saving, if the UE cannot detect downlink control information (DCI) during a specified period, the UE can switch the active BWP of the UE to the default BWP.

[0119] In addition, a BWP can be defined for sidelink (SL). The same SL BWP can be used for transmission and reception. For example, the transmitting UE can transmit an SL channel or an SL signal on a specific BWP, and the receiving UE can receive an SL channel or an SL signal on a specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have configuration signaling separate from the Uu BWP. For example, the UE can receive the configuration for the SL BWP from the BS / network. For example, the UE can receive the configuration for the Uu BWP from the BS / network. The SL BWP is (pre-)configured in the carrier for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For UEs in the RRC_CONNECTED mode, at least one SL BWP can be activated in the carrier.

[0120] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Assume that in Figure 7 the embodiment of, the number of BWPs is 3.

[0121] Referring to Figure 7, a Common Resource Block (CRB) can be a carrier resource block numbered from one end of a carrier frequency band to the other end. Additionally, a PRB can be a resource block numbered within each BWP. Point A can indicate a common reference point of the resource block grid.

[0122] A BWP can be configured by Point A, an offset (N start BWP ) relative to Point A, and a bandwidth (N size BWP ). For example, Point A can be an external reference point of the PRB of a carrier, and sub - carrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned at Point A. For example, the offset can be the PRB distance between the lowest sub - carrier within a given parameter set and Point A. For example, the bandwidth can be the number of PRBs within a given parameter set.

[0123] In the following text, V2X or SL communication will be described.

[0124] The Sidelink Synchronization Signal (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 Sidelink Primary Synchronization Signal (S - PSS), and the SSSS can be referred to as the Sidelink Secondary Synchronization Signal (S - SSS). For example, an M - sequence of length 127 can be used for the S - PSS, and a Gold sequence of length 127 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 the S - PSS and S - SSS for detailed synchronization acquisition and for the detection of synchronization signal IDs.

[0125] The Physical Sidelink Broadcast Channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information that a UE must first know before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time - division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pools, and the type of applications related to SLSS, sub - frame offset, broadcast information, etc. For example, to evaluate the PSBCH performance, in NR V2X, the payload size of the PSBCH can be 56 bits, including a 24 - bit Cyclic Redundancy Check (CRC).

[0126] The S-PSS, S-SSS, and PSBCH may be included in a block format that supports periodic transmission (e.g., the SL synchronization signal (SS) / PSBCH block, hereinafter referred to as the sidelink synchronization signal block (S-SSB)). The S-SSB may have the same parameter set as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier (i.e., SCS and CP length), and the transmission bandwidth may be within the preconfigured sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH may span 11 RBs. Additionally, the frequency position of the S-SSB may be preconfigured. Thus, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0127] Figure 8 A process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure is shown. Figure 8 Embodiments of may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as the LTE transmission mode. In NR, the transmission mode may be referred to as the NR resource allocation mode.

[0128] For example, Figure 8 (a) in shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) in shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.

[0129] For example, Figure 8 (b) in shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) in shows UE operations related to NR resource allocation mode 2.

[0130] Referring to Figure 8 (a) of, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station may schedule the sidelink resources to be used by the UE for sidelink transmission. For example, in step S600, the base station may send information related to the sidelink resources and / or information related to the UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting sidelink HARQ feedback to the base station.

[0131] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configured grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources may be resources configured / assigned by the base station to the first UE via downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources configured / assigned by the base station to the first UE via DCI and / or RRC messages. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first UE. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first UE, and the base station may send DCI related to the activation or release of the CG resources to the first UE.

[0132] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or first-level SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH (e.g., second-level SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report the HARQ feedback information to the base station via PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may 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 may be information generated by the first UE based on pre-configured rules. For example, the DCI may be DCI for SL scheduling. For example, the format of the DCI may be DCI format 3_0 or DCI format 3_1.

[0133] Refer to Figure 8In (b) thereof, in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE may determine SL transmission resources within the SL resources configured by the base station / network or pre-configured SL resources. For example, the configured SL resources or pre-configured SL resources may be resource pools. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within the selection window by performing a sensing process and a resource (re)selection process. For example, sensing may be performed on a sub-channel basis. For example, in step S810, the first UE that has already selected resources from the resource pool by itself may send a PSCCH (e.g., sidelink control information (SCI) or first-level SCI) to the second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., second-level SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0134] Referring to Figure 8 In (a) or (b) thereof, for example, the first UE may send an SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., 2-level SCI) to the second UE via the PSCCH and / or PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., 2-level SCI) to receive the PSSCH from the first UE. In the present disclosure, the SCI sent via the PSCCH may be referred to as the first SCI, the first SCI, the first-level SCI, or the first-level SCI format, and the SCI sent via the PSSCH may be referred to as the second SCI, the second SCI, the second-level SCI, or the second-level SCI format. For example, the first-level SCI format may include SCI format 1-A, and the second-level SCI format may include SCI format 2-A and / or SCI format 2-B.

[0135] Hereinafter, an example of SCI format 1-A will be described.

[0136] SCI format 1-A is used for the scheduling of the second-level SCI on the PSSCH and the PSSCH.

[0137] The following information is sent by means of SCI format 1-A:

[0138] - Priority - 3 bits

[0139] - Frequency resource allocation - When the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2, it is ceiling(log2(N SL subChannel (N SL subChannel + 1) / 2)) bits; otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3, it is ceiling log2(N SL subChannel (N SL subChannel + 1)(2N SL subChannel + 1) / 6) bits

[0140] - Time resource allocation - When the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2, it is 5 bits; otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3, it is 9 bits

[0141] - Resource reservation period - If the higher layer parameter sl-MultiReserveResource is configured, it is ceiling(log2 N rsv_period ) bits, where N rsv_period is the number of entries in the higher layer parameter sl-MultiReserveResource; otherwise, it is 0 bits

[0142] - DMRS mode - ceiling(log2 N pattern ) bits, where N pattern is the number of DMRS modes configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList

[0143] - Second-level SCI format - 2 bits as defined in Table 5

[0144] - Beta_offset indicator – 2 bits as provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0145] - Number of DMRS ports - 1 bit as defined in Table 6

[0146] - Modulation and coding scheme - 5 bits

[0147] - Additional MCS table indicator - 1 bit if one MCS table is configured by the higher layer parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are configured by the higher layer parameter sl-Additional-MCS-Table; otherwise, 0 bits

[0148] - PSFCH overhead indicator - 1 bit if the higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise, 0 bits

[0149] - Reserved - The number of bits determined by the higher layer parameter sl-NumReservedBits, and its value is set to zero.

[0150] [Table 5]

[0151] Value of the second-level SCI format field Second-level SCI format 00 SCI format 2-A 01 SCI format 2-B 10 Reserved 11 Reserved

[0152] [Table 6]

[0153] Value of the DMRS port number field Antenna port 0 1000 1 1000 and 1001

[0154] In the following, an example of SCI format 2-A will be described.

[0155] When the HARQ-ACK information includes ACK or NACK, when the HARQ-ACK information only includes NACK, or when there is no feedback of HARQ-ACK information, SCI format 2-A is used to decode the PSSCH with HARQ operations.

[0156] The following information is sent by means of SCI format 2-A:

[0157] - HARQ process number - 4 bits

[0158] - New data indicator - 1 bit

[0159] - Redundancy version - 2 bits

[0160] - Source ID - 8 bits

[0161] - Destination ID - 16 bits

[0162] - HARQ feedback enable / disable indicator - 1 bit

[0163] - Broadcast type indicator - 2 bits as defined in Table 7

[0164] - CSI request - 1 bit

[0165] [Table 7]

[0166] Value of the broadcast type indicator Broadcast type 00 Broadcast 01 Multicast when the HARQ-ACK information includes ACK or NACK 10 Unicast 11 Multicast when the HARQ-ACK information only includes NACK

[0167] In the following, an example of SCI format 2-B will be described.

[0168] When the HARQ-ACK information only includes NACK or when there is no HARQ-ACK information feedback, SCI format 2-B is used to decode the PSSCH by means of HARQ operations.

[0169] The following information is sent by means of SCI format 2-B:

[0170] - HARQ process number - 4 bits

[0171] - New data indicator - 1 bit

[0172] - Redundancy version - 2 bits

[0173] - Source ID - 8 bits

[0174] - Destination ID - 16 bits

[0175] - HARQ feedback enable / disable indicator - 1 bit

[0176] - Region ID - 12 bits

[0177] - Communication range requirement - 4 bits determined by the higher layer parameter sl-ZoneConfigMCR-Index

[0178] Refer to Figure 8 In (a) or (b) of, in step S830, 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 uses the PSFCH resource to send HARQ feedback to the first UE.

[0179] Refer to Figure 8 In (a) of, in step S840, the first UE may send SL HARQ feedback to the base station via the PUCCH and / or PUSCH.

[0180] Figure 9 Shows three broadcast types according to an embodiment of the present disclosure. Figure 9 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 9 (a) in shows broadcast-type SL communication, Figure 9 (b) in shows unicast-type SL communication, and Figure 9 (c) in shows multicast-type SL communication. In the case of unicast-type SL communication, the UE may perform one-to-one communication for another UE. In the case of multicast-type SL transmission, the UE may perform SL communication for one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL multicast communication may be replaced by SL multiple communication, SL one-to-many communication, etc.

[0181] In the following, a UE procedure for determining a subset of resources to be reported to the higher layer in PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0182] In resource allocation mode 2, the higher layer may request the UE to determine a subset of resources from which the higher layer will select resources for PSSCH / PSCCH transmission. To trigger this procedure, in time slot n, the higher layer provides the following parameters for this PSSCH / PSCCH transmission.

[0183] - The resource pool for which resources are to be reported;

[0184] - L1 priority prio TX ;

[0185] - The remaining packet delay budget;

[0186] - The number L of subchannels for PSSCH / PSCCH transmission in the time slot subCH ;

[0187] - Optionally, the resource reservation interval P rsvpTX , in milliseconds.

[0188] - If the higher layer requests the UE to determine a subset of resources from which the higher layer will select resources for PSSCH / PSCCH transmission as part of a re-evaluation or pre-emption procedure, the higher layer provides the set of resources (r0, r1, r2,...) that may be subject to re-evaluation and the set of resources (r′0, r′1, r′2,...) that may be subject to pre-emption.

[0189] - Whether to determine the subset of resources requested by the higher layer before or after time slot r i ″ -T3 depends on the UE implementation, where r i ″ is the time slot with the smallest time slot index among (r0, r1, r2,...) and (r′0, r′1, r′2,...), and T3 is equal to TSL proc，1 , where T SL proc，1 is defined per time slot, and where μ SL is the SCS configuration of the SL BWP,

[0190] The following higher layer parameters affect this procedure:

[0191] - sl-SelectionWindowList: For a given value of priop TX , the internal parameter T 2min is set to the corresponding value from the higher layer parameter sl-SelectionWindowList.

[0192] -sl-Thres-RSRP-List: This high-level parameter is for each combination (p i , p j ) provides the RSRP threshold, where p i is the value of the priority field in the received SCI format 1-A, and p j is the priority of the UE's transmission for selecting resources; for a given invocation of this procedure, p j =prio TX .

[0193] -sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP measurement or PSCCH-RSRP measurement.

[0194] -sl-ResourceReservePeriodList

[0195] -sl-SensingWindow: The internal parameter T0 is defined as the number of time slots corresponding to sl-SensingWindow milliseconds

[0196] -sl-TxPercentageList: for a given prio TX The internal parameter X is defined as the sl-TxPercentageListpriop that converts from percentage to ratio TX

[0197] -sl-PreemptionEnable: If sl-PreemptionEnable is set, and if it is not equal to "enabled", the internal parameter prio pre Set to the parameter sl-PreemptionEnable provided by higher layers.

[0198] Resource reservation interval P rsvp_TX Convert from milliseconds to logical slots (if provided), yielding P′ rsvp_TX .

[0199] Explanation of symbols:

[0200] (t′ SL 0, t′ SL 1, t′ SL 2, ...) can represent a set of time slots belonging to the secondary link resource pool.

[0201] For example, the UE may select a candidate resource set (Sa) based on Table 8. For example, when resource selection (reselection) is triggered, the UE may select a candidate resource set (Sa) based on Table 8. For example, when re-evaluation or preemption is triggered, the UE may select a candidate resource set (Sa) based on Table 8.

[0202] [Table 8]

[0203]

[0204]

[0205]

[0206] In addition, partial sensing may be supported for power saving of the UE. For example, in LTE SL or LTE V2X, the UE may perform partial sensing based on Table 9 and Table 10.

[0207] [Table 9]

[0208]

[0209] [Table 10]

[0210]

[0211] In addition, in the normal unlicensed spectrum (NR-U), a communication method between the UE and the base station is supported in the unlicensed band. Additionally, a mechanism for supporting communication in the unlicensed band between sidelink UEs is planned to be supported in Rel-18.

[0212] In the present disclosure, a channel may refer to a set of frequency-domain resources that perform Listen Before Talk (LBT). In NR-U, a channel may refer to an LBT bandwidth of 20 MHz and may have the same meaning as a set of RBs. For example, a set of RBs may be defined in Section 7 of 3GPP TS38.214 V17.0.0.

[0213] In the present disclosure, channel occupancy (CO) may refer to the time-domain / frequency-domain resources obtained by the base station or the UE after successful LBT.

[0214] In the present disclosure, channel occupancy time (COT) may refer to the time-domain resources obtained by the base station or the UE after successful LBT. The channel occupancy time (COT) may be shared between the base station (or UE) that obtains the CO and the UE (or base station), and this may be referred to as COT sharing. Depending on the initiating device, this may be referred to as gNB-initiated COT or UE-initiated COT.

[0215] Hereinafter, a wireless communication system that supports an unlicensed band / shared spectrum will be described.

[0216] Figure 10 Shows an example of a wireless communication system supporting an unlicensed band according to an embodiment of the present disclosure. For example, Figure 10 may include an unlicensed spectrum (NR-U) wireless communication system. Figure 10 Embodiments of may be combined with various embodiments of the present disclosure.

[0217] In the following description, a cell operating in a licensed band (hereinafter, the L band) may be defined as an L cell, and the carrier of the L cell may be defined as a (DL / UL / SL) LCC. In addition, a cell operating in an unlicensed band (hereinafter, the U band) may be defined as a U cell, and the carrier of the U cell may be defined as a (DL / UL / SL) UCC. The carrier / carrier frequency of a cell may refer to the operating frequency of the cell (e.g., the center frequency). A cell / carrier (e.g., CC) is generally referred to as a cell.

[0218] As Figure 10 shown in (a) of, when the base station and the UE transmit and receive signals on the LCC and UCC of carrier aggregation, the LCC and UCC may be respectively configured as the primary CC (PCC) and the secondary CC (SCC). As Figure 10 shown in (b) of, the base station and the UE may transmit and receive signals on one UCC or on multiple carrier-aggregated UCCs. In other words, the base station and the UE may transmit and receive signals only on the UCC without using any LCC. For stand-alone operation, PRACH transmission, PUCCH transmission, PUSCH transmission, SRS transmission, etc. may be supported on the U cell.

[0219] In Figure 10 embodiments of, the base station may be replaced by the UE. In this case, for example, PSCCH transmission, PSSCH transmission, PSFCH transmission, S-SSB transmission, etc. may be supported on the U cell.

[0220] Unless otherwise specified, the following definitions apply to the following terms used in the present disclosure.

[0221] - Channel: A carrier or a part of a carrier consisting of a continuous set of RBs that perform a channel access procedure in a shared spectrum.

[0222] - Channel access procedure (CAP): A process of evaluating channel availability based on sensing before signal transmission to determine whether other communication nodes are using the channel. The basic sensing unit is a sensing time slot, where the duration T sl = 9 us. The base station or the UE senses the channel during the sensing time slot duration. If the power detected within at least 4 us during the sensing time slot duration is less than the energy detection threshold X thresh, then the sensing time slot duration T sl is considered idle. Otherwise, the sensing time slot duration T sl = 9 us is considered busy. CAP can also be referred to as listen-before-talk (LBT). For example, the channel access procedure (CAP) can include LBT and can perform channel sensing to monitor the power of the channel during a specific time interval (channel sensing interval) of the CAP.

[0223] - Channel occupancy: Transmission by the base station / UE on the channel after the channel access procedure.

[0224] - Channel occupancy time (COT): After the base station / UE performs the channel access procedure, the total time during which the base station / UE sharing the channel occupancy and any base station / UE can perform transmission on the channel. When determining the COT, if the transmission gap is less than or equal to 25 us, the gap duration can be counted in the COT. The COT can be shared for transmission between the base station and the corresponding UE.

[0225] - DL transmission burst: A set of transmissions from the base station without any gap greater than 16 us. Transmissions from the base station separated by a gap greater than 16 us are considered separate DL transmission bursts. The base station can perform transmission after the gap without sensing the channel availability within the DL transmission burst.

[0226] - UL or SL transmission burst: A set of transmissions from the UE without any gap greater than 16 us. Transmissions from the UE separated by a gap greater than 16 us are considered separate UL or SL transmission bursts. The UE can perform transmission after the gap without sensing the channel availability within the UL or SL transmission burst.

[0227] - Discovery burst: A DL transmission burst includes a set of signals and / or channels that are restricted within a window and associated with a duty cycle. In an LTE-based system, the discovery burst can be a transmission initiated by the base station, which includes PSS, SSS, and cell-specific RS (CRS), and also includes non-zero power CSI-RS. In an NR-based system, the discovery burst can be a transmission initiated by the base station, which at least includes the SS / PBCH block, and also includes the CORESET of the PDCCH for scheduling the PDSCH carrying SIB1, the PDSCH carrying SIB1, and / or non-zero power CSI-RS.

[0228] Figure 11 Illustrates a method for occupying resources in an unlicensed frequency band based on an embodiment of the present disclosure. Figure 11 The embodiments can be combined with various embodiments of the present disclosure.

[0229] Refer toFigure 11 , a communication node (e.g., a base station, a UE) in an unlicensed band should determine whether other communication nodes are using the channel before signal transmission. To this end, a communication node in an unlicensed band may perform a Channel Access Procedure (CAP) to access the channel for transmission. The channel access procedure may be performed based on sensing. For example, a communication node may perform Carrier Sensing (CS) before transmitting a signal to check whether other communication nodes are performing signal transmission. When other communication nodes are not performing signal transmission, a Clear Channel Assessment (CCA) is confirmed. If the CCA threshold (e.g., X Thresh ) is predefined or configured by a higher layer (e.g., RRC), a communication node may determine that the channel is busy if the detected channel energy is higher than the CCA threshold. Otherwise, the communication node may determine that the channel is idle. If it is determined that the channel is idle, the communication node may start signal transmission in the unlicensed band. The CAP may be replaced by LBT. For example, the Channel Access Procedure (CAP) may include LBT, and channel sensing may be performed to monitor the power of the channel during a specific time interval (channel sensing interval) of the CAP.

[0230] Table 11 shows an example of the Channel Access Procedure (CAP) supported in NR-U.

[0231] [Table 11]

[0232]

[0233] Referring to Table 11, LBT types or CAPs for DL / UL / SL transmission may be defined. However, Table 11 is only an example, and new types or CAPs may be defined in a similar manner. For example, Type 1 (also known as Cat-4 LBT) may be a channel access procedure based on random backoff. For example, in the case of Cat-4, the contention window may change. For example, Type 2 may be performed in the case of COT sharing within the COT obtained by a base station (gNB) or a UE.

[0234] Hereinafter, LBT-Subband (SB) (or a set of RBs) will be described.

[0235] In a wireless communication system supporting an unlicensed band, a cell (or carrier (e.g., CC)) or BWP configured for a UE may have a wideband that has a larger bandwidth (BW) than that in conventional LTE. However, the BW for which CCA based on independent LBT operation is required may be restricted according to regulations. A sub-band (SB) that performs LBT separately is defined as an LBT-SB. Then, a wideband cell / BWP may include multiple LBT-SBs. The set of RBs included in an LBT-SB may be configured by higher layer (e.g., RRC) signaling. Therefore, based on (i) the BW of the cell / BWP and (ii) the RB set allocation information, one or more LBT-SBs may be included in a cell / BWP.

[0236] Figure 12 A case where multiple LBT-SBs are included in an unlicensed band based on an embodiment of the present disclosure is shown. Figure 12 Embodiments of may be combined with various embodiments of the present disclosure.

[0237] Refer to Figure 12 , multiple LBT-SBs may be included in the BWP of a cell (or carrier). An LBT-SB may have, for example, a 20 MHz band. An LBT-SB may include multiple consecutive (P) RBs in the frequency domain and thus may be referred to as a set of (P) RBs. Although not shown, a guard band (GB) may be inserted between LBT-SBs. Therefore, the BWP may be configured in the form of {LBT-SB#0 (RB set #0) + GB#0 + LBT-SB#1 (RB set #1 + GB#1) + ··· + LBT-SB#(K-1) (RB set (#K-1))}. For convenience, LBT-SB / RB indices may be configured / defined in ascending order from the lowest frequency to the highest frequency.

[0238] Hereinafter, the channel access priority class (CAPC) will be described.

[0239] The CAPC of the MAC CE and radio bearers may be fixed or configured to operate in FR1:

[0240] - Fixed to the lowest priority for padding buffer status report (BSR) and recommended bitrate MAC CE;

[0241] - Fixed to the highest priority for SRB0, SRB1, SRB3, and other MAC CE;

[0242] - Configured by the base station for SRB2 and DRB.

[0243] When selecting the CAPC for a DRB, the base station considers the fairness between other service types and transmissions while taking into account the 5QIs of all QoS flows multiplexed to the corresponding DRB. Table 12 shows which CAPC should be used for the standardized 5QIs (i.e., the CAPC to be used for a given QoS flow). For the standardized 5QIs, the CAPC is defined as shown in the following table, and for non-standardized 5QIs, the CAPC with the best QoS characteristics should be used.

[0244] [Table 12]

[0245]

[0246] Hereinafter, a method for transmitting a downlink signal through an unlicensed band will be described. For example, the method for transmitting a downlink signal through an unlicensed band can be applied to the method for transmitting a sidelink signal through an unlicensed band.

[0247] The base station can perform one of the following channel access procedures (e.g., CAP) for downlink signal transmission in the unlicensed band.

[0248] (1) Type 1 downlink (DL) CAP method

[0249] In Type 1 DL CAP, the length of the duration spanned by the sensed time slots sensed as idle before transmission can be random. Type 1 DL CAP can be applied to the following transmissions:

[0250] - Transmissions initiated by the base station include (i) a unicast PDSCH with user plane data or (ii) a unicast PDSCH with user plane data and a unicast PDCCH scheduling user plane data, or

[0251] - Transmissions initiated by the base station include (i) only discovery bursts or (ii) discovery bursts multiplexed with non-unicast information.

[0252] Figure 13 Shows the CAP operation performed by the base station based on an embodiment of the present disclosure to transmit a downlink signal through an unlicensed band. Figure 13 The embodiments of can be combined with various embodiments of the present disclosure.

[0253] Refer to Figure 13 , the base station can sense whether the channel is idle for a sensing delay duration T d of the time slot duration. Then, if the counter N is zero, the base station can perform the transmission (S134). In this case, the base station can adjust the counter N by sensing the channel within an additional sensing time slot duration according to the following steps:

[0254] Step 1) (S120) The base station sets N to N init (N = N init ), where N init is a random number evenly distributed between 0 and CW p . Then, proceed to Step 4.

[0255] Step 2) (S140) If N > 0 and the base station determines to decrement the counter, the base station sets N to N - 1 (N = N - 1).

[0256] Step 3) (S150) The base station senses the channel during the additional sensing time slot duration. If the additional sensing time slot duration is idle (Y), proceed to Step 4. Otherwise (N), proceed to Step 5.

[0257] Step 4) (S130) If N = 0 (Y), the base station terminates the CAP (S132). Otherwise (N), proceed to Step 2.

[0258] Step 5) (S160) The base station senses the channel until a busy sensing time slot is detected within the additional delay duration T d or all time slots of the additional delay duration T d are detected as idle.

[0259] Step 6) (S170) If the channel is sensed as idle (Y) during all time slot durations of the additional delay duration T d , proceed to Step 4. Otherwise (N), proceed to Step 5.

[0260] Table 13 shows that m p , the minimum contention window (CW), the maximum CW, the maximum channel occupancy time (MCOT), and the allowed CW size vary according to the channel access priority class.

[0261] [Table 13]

[0262]

[0263] Referring to Table 13, the contention window size (CWS), the maximum COT value, etc. for each CAPC can be defined. For example, T d can be equal to T f + m p * T sl (T d = T f + m p * T sl ).

[0264] The delay duration T d is configured in the following order: the duration Tf (16 us) + m p Continuous sensing slot duration T sl (9 us). T f Including the sensing slot duration T at the start of the 16 us duration sl .

[0265] Satisfies the following relationship: CW min,p <= CW p <= CW max,p . CW p Can be configured by CW p = CW min,p And updated (CW size update) based on the HARQ-ACK feedback (e.g., ratio of ACK or NACK) for the previous DL burst (e.g., PDSCH) before step 1. For example, CW can be initialized based on the HARQ-ACK feedback for the previous DL burst p To CW min,p . Alternatively, CW p Can be increased to the next higher allowed value or remain unchanged.

[0266] (2) Type 2 downlink (DL) CAP method

[0267] In Type 2 DL CAP, the length of the duration spanned by the sensing slots sensed as idle before transmission can be determined. Type 2 DL CAP is classified as Type 2A / 2B / 2C DL CAP.

[0268] Type 2A DL CAP can be applied to the following transmissions. In Type 2A DL CAP, the base station can perform transmission immediately after the channel has been sensed as idle for at least the sensing duration T short_dl = 25 us. Here, T short_dl Includes the duration T f (= 16 us) and one sensing slot duration immediately following the duration T f , where the duration T f Includes the sensing slot at its start.

[0269] - Transmissions initiated by the base station, including (i) discovery bursts only or (ii) discovery bursts multiplexed with non-unicast information, or

[0270] - Transmissions by the base station after a 25 us gap from the UE's transmission within the shared channel occupancy.

[0271] Type 2B DL CAP is applicable to transmissions performed by the base station after a gap of 16 us from the transmission of the UE during the shared channel occupancy time. In Type 2B DL CAP, the base station can perform a transmission immediately after the channel is sensed idle within T f = 16 us. T f includes a sensing time slot within 9 us from the end of the duration. Type 2C DL CAP is applicable to transmissions performed by the base station after up to 16 us from the transmission of the UE during the shared channel occupancy time. In Type 2C DL CAP, the base station does not perform channel sensing before performing a transmission.

[0272] Hereinafter, a method of transmitting an uplink signal through an unlicensed band will be described. For example, the method of transmitting an uplink signal through an unlicensed band can be applied to the method of transmitting a sidelink signal through an unlicensed band.

[0273] The UE can perform Type 1 CAP or Type 2 CAP for UL signal transmission in the unlicensed band. Generally, the UE can perform the CAP (e.g., Type 1 or Type 2) configured by the base station for UL signal transmission. For example, the UL grant (e.g., DCI format 0_0 and DCI format 0_1) scheduling the PUSCH transmission can include CAP type indication information for the UE.

[0274] (1) Type 1 uplink (UL) CAP method

[0275] In Type 1 UL CAP, the length of the duration spanned by the sensing time slot sensed idle before transmission is random. Type 1 UL CAP can be applied to the following transmissions.

[0276] - PUSCH / SRS transmission scheduled and / or configured by the base station

[0277] - PUCCH transmission scheduled and / or configured by the base station

[0278] - Transmissions related to the random access procedure (RAP)

[0279] Figure 14 shows a Type 1 CAP operation performed by the UE to transmit an uplink signal based on an embodiment of the present disclosure. Figure 14 The embodiments can be combined with various embodiments of the present disclosure.

[0280] Referring to Figure 14 , the UE can sense the channel during the delay duration T dWhether it is idle during the sensing time slot duration. Then, if the counter N is zero, the UE can perform a transmission (S234). In this case, the UE can adjust the counter N by sensing the channel during an additional sensing time slot duration according to the following steps:

[0281] Step 1) (S220) The UE sets N to N init (N = N init ), where N init is a random number uniformly distributed between 0 and CW p . Then, proceed to Step 4.

[0282] Step 2) (S240) If N > 0 and the UE determines to decrease the counter, the UE sets N to N - 1 (N = N - 1).

[0283] Step 3) (S250) The UE senses the channel during an additional sensing time slot duration. If the additional sensing time slot duration is idle (Y), proceed to Step 4. Otherwise (N), proceed to Step 5.

[0284] Step 4) (S230) If N = 0 (Y), the UE terminates the CAP (S132). Otherwise (N), proceed to Step 2.

[0285] Step 5) (S260) The UE senses the channel until a busy sensing time slot is detected within an additional delay duration T d or all time slots of the additional delay duration T d are detected as idle.

[0286] Step 6) (S270) If the channel is sensed as idle (Y) during all time slot durations of the additional delay duration T d , proceed to Step 4. Otherwise (N), proceed to Step 5.

[0287] Table 14 shows that m p , the minimum CW, the maximum CW, the maximum channel occupancy time (MCOT), and the allowed CW size vary according to the channel access priority class.

[0288] [Table 14]

[0289]

[0290] Referring to Table 14, the contention window size (CWS), the maximum COT value, etc. can be defined for each CAPC. For example, T d can be equal to T f + m p * T sl (T d = Tf +m p *T sl )。

[0291] The delay duration T d is configured in the following order: the duration T f (16us)+m p The continuous sensing time slot duration T sl (9us).T f includes the sensing time slot duration T starting at the beginning of the 16us duration sl .

[0292] Satisfies the following relationship: CW min,p <= CW p <= CW max,p .CW p Can be configured by CW p = CW min,p configured and updated (CW size update) based on the explicit / implicit reception response for the previous UL burst (e.g., PUSCH) before step 1. For example, CW p can be initialized to CW min,p . Alternatively, CW p can be increased to the next higher allowed value or remain unchanged.

[0293] (2) Type 2 uplink (UL) CAP method

[0294] In Type 2 UL CAP, the length of the duration spanned by the sensing time slot sensed as idle before transmission can be determined. Type 2 UL CAP is classified as Type 2A / 2B / 2C UL CAP. In Type 2A UL CAP, the UE can perform transmission immediately after the channel has been sensed as idle for at least the sensing duration T short_dl = 25us. Here, T short_dl includes the duration T f (= 16us) and one sensing time slot duration immediately following the duration T f . In Type 2A UL CAP, T f includes a sensing time slot at its start. In Type 2B UL CAP, the UE can perform transmission immediately after the channel has been sensed as idle within the sensing duration T f = 16us. In Type 2B UL CAP, T f includes the sensing time slot within 9us from the end of the duration. In Type 2C UL CAP, the UE does not perform channel sensing before performing transmission.

[0295] For example, according to type 1 LBT-based NR-U operation, a UE having uplink data to transmit can select a CAPC for the 5QI to which the data is mapped, and the UE can perform NR-U operation by applying the parameters of the corresponding CAPC (e.g., minimum contention window size, maximum contention window size, m p etc.). For example, the UE can select a backoff counter (BC) after choosing a random value between the minimum CW and the maximum CW mapped to the CAPC. In this case, for example, the BC can be a positive integer less than or equal to the random value. If the channel is idle, the UE sensing the channel decrements the BC by 1. If the BC becomes zero and the UE detects that the channel is idle within time T d (T d = T f + m p * T sl ), the UE can attempt to transmit data by occupying the channel. For example, T sl (= 9 microseconds) is a basic sensing unit or sensing slot, and can include a measurement duration of at least 4 microseconds. For example, the first 9 microseconds of T f (= 16 microseconds) can be configured as T sl .

[0296] For example, according to type 2 LBT-based NR-U operation, the UE can transmit data by performing type 2 LBT (e.g., type 2A LBT, type 2B LBT, or type 2C LBT) within the COT.

[0297] For example, type 2A (also known as Cat-2 LBT (one shot LBT) or single shot LBT) can be a 25-microsecond one shot LBT. In this case, transmission can start immediately after sensing an idle period of at least 25 microseconds. Type 2A can be used to initiate the transmission of SSB and non-unicast DL information. That is, the UE can sense the channel within the COT for 25 microseconds, and if the channel is idle, the UE can attempt to transmit data by occupying the channel.

[0298] For example, type 2B can be a 16-microsecond one shot LBT. In this case, transmission can start immediately after sensing an idle period of 16 microseconds. That is, the UE can sense the channel within the COT for 16 microseconds, and if the channel is idle, the UE can attempt to transmit data by occupying the channel.

[0299] For example, in the case of Type 2C (also known as Cat-1 LBT or No LBT), LBT may not be performed. In this case, transmission can start immediately after a gap of up to 16 microseconds, and the channel may not be sensed before transmission. The duration of the transmission can be up to 584 microseconds. The UE can attempt transmission without sensing after 16 microseconds, and the UE can perform transmission for up to 584 microseconds.

[0300] In the sidelink unlicensed band, the UE can perform channel access operations based on Listen Before Talk (LBT). Before the UE accesses a channel in the unlicensed band, the UE shall check whether the channel to be accessed is idle (e.g., the state where the UE does not occupy the channel, the state where the UE can access the corresponding channel and send data) or busy (e.g., the state where the channel is occupied and data transmission / reception is being performed on the corresponding channel, and the UE attempting to access the channel cannot send data when the channel is busy). That is to say, the operation for the UE to check whether the channel is idle or busy can be referred to as Clear Channel Assessment (CCA), and the UE can check whether the channel is idle or busy within the CCA duration.

[0301] In addition, in future systems, the UE can perform sidelink transmission and / or reception operations in the unlicensed band. For operations in the unlicensed band, according to band-specific regulations or requirements, before the UE's transmission, there can be a channel sensing operation (e.g., energy detection / measurement) for the channel to be used. As a result of the channel sensing, only when it is determined that the channel or the set of RBs to be used is idle (e.g., if the measured energy is less than or equal to or greater than a specific threshold), the UE can perform transmission in the unlicensed band. And if it is determined that the channel or the set of RBs to be used is busy based on the result of the channel sensing (e.g., if the measured energy is greater than or equal to or greater than a specific threshold), the UE can cancel all or part of the transmission in the unlicensed band.

[0302] In addition, in the operation of the unlicensed band, the UE can omit or simplify the channel sensing operation (i.e., make the channel sensing interval relatively small) within a specific time interval after transmission within a specific period of time. Or in contrast, after a specific time interval after transmission, the UE can decide whether to send after performing the normal channel sensing operation.

[0303] On the other hand, in the transmission in the unlicensed band, according to regulations or requirements, the time interval and / or the size of the frequency occupancy area and / or the power spectral density (PSD) of the signal / channel sent by the UE can be greater than or equal to a specific level, respectively.

[0304] On the other hand, in the unlicensed band, to simplify channel sensing, it is possible to notify that a channel obtained through initial common channel sensing is occupied within a specific time period by means of Channel Occupancy Time (COT) interval information, and the length of the COT interval can be configured to have different maximum values according to the priority of the service or data packet or the Channel Access Priority Class (CAPC).

[0305] On the one hand, the base station can share the obtained COT duration through channel sensing in the form of DCI transmission, and the UE can perform a specific (indicated) channel sensing type and / or CP extension within the COT duration based on the DCI information received from the base station. On the other hand, the UE can share the COT duration it has ensured through channel sensing with the base station that is the destination of the UE's UL transmission, and can provide relevant information through UL via CG-UCI. In the above cases, the base station can perform simplified channel sensing within the COT duration shared by the UE.

[0306] In the case of SL communication, there are cases where the base station indicates to the UE to use resources for SL transmission through DCI or RRC signaling (e.g., mode 1 RA operation), and there are cases where the UE performs SL transmission and reception through sensing operations between UEs without the assistance of the base station (e.g., mode 2 RA operation).

[0307] On the other hand, for channel access type 1 that can be used independently of the Channel Occupancy Time (COT) configuration, the procedures for DL transmission shown in Tables 15 and 16 and the procedures for UL transmission shown in Tables 17 and 18 are performed.

[0308] In the present disclosure, channel access can be mutually replaced / substituted with channel sensing.

[0309] [Table 15]

[0310]

[0311] [Table 16]

[0312]

[0313] [Table 17]

[0314]

[0315]

[0316] [Table 18]

[0317]

[0318] On the other hand, within the Channel Occupancy Time (COT), a simplified channel access type 2 can be used before transmission, and the procedures for DL transmission as shown in Table 19 and the procedures for UL transmission as shown in Table 20 are executed.

[0319] [Table 19]

[0320]

[0321] [Table 20]

[0322]

[0323] According to an embodiment of the present disclosure, type 2A SL channel access can be performed in the same manner as type 2A DL and / or UL channel access, with a sensing interval of T_short_sl = 25 us and a T_f = 16 us interval immediately following the sensing interval consisting of one sensing time slot, where T_f includes the sensing time slot at the beginning. For basic idle determination, the DL or UL scheme can also be used.

[0324] According to an embodiment of the present disclosure, type 2B SL channel access can be performed in the same manner as type 2B DL and / or UL channel access, where the sensing interval T_f = 16 us, and T_f includes the sensing time slot at the end of the 9 us interval. For basic idle determination, the DL or UL scheme can also be used.

[0325] According to an embodiment of the present disclosure, type 2C SL channel access can be performed in the same manner as type 2C DL and / or UL channel access, such that channel sensing is not performed. Instead, the time interval for SL transmission can be up to 584 us.

[0326] According to an embodiment of the present disclosure, type 1 SL channel access is performed in the same manner as type 1 DL and / or UL channel access, where: i) a random integer value N is derived based on the contention window size corresponding to the priority class, ii) if the channel sensing result within the delay duration of T_d corresponding to the priority class is idle, the counter value decrements to N - 1 in units of T_sl when idle; and iii) if the counter value is zero, the UE can occupy the set of RBs or channels that have undergone channel sensing.

[0327] However, if some of the channel sensing results for the above T_sl interval are determined to be idle, the counter value can be maintained and channel sensing can continue until the channel sensing result in units of a delay duration of size T_d becomes idle again. Above, the delay duration of length T_d can be in the form of m_p consecutive T_sl after T_f = 16 us, where m_p is a value determined according to the priority class p and can be the time interval for performing channel sensing with T_sl = 9 us.

[0328] According to an embodiment of the present disclosure, when the UE has accessed and occupied a channel via a type 1 SL channel and the UE is not ready to send a sidelink transmission, the UE can immediately configure a delay duration of length T_d and a sensing interval of length T_sl before preparing to send a sidelink transmission, and if both are idle, the UE can immediately perform a sidelink transmission. Here, if any of them is busy, the UE can perform type 1 SL channel access again.

[0329] For example, if it is difficult to perform a sidelink transmission at the end of channel sensing (e.g., if the end of channel sensing occurs after the start of a sidelink transmission), the UE can reselect sidelink transmission resources. For example, the reselected resources can be selected considering the end time of channel sensing and / or the length of the remaining sensing interval. For example, the remaining sensing interval can be a value derived by assuming that the entire channel sensing is idle.

[0330] In addition, in the present disclosure, the transmitting UE (i.e., TX UE) can be the UE that sends data to the (target) receiving UE (i.e., RX UE). For example, the TX UE can be the UE that performs PSCCH transmission and / or PSSCH transmission. For example, the TX UE can be the UE that sends SL CSI-RS and / or SL CSI report request indication to the (target) RX UE. For example, the TX UE can be the UE that sends the (predefined) reference signal (e.g., PSSCH demodulation reference signal (DM-RS)) for SL (L1) RSRP measurement and / or SL (L1) RSRP report request indicator to the (target) RX UE. For example, the TX UE can be the UE that sends a (control) channel (e.g., PSCCH, PSSCH, etc.) and / or a reference signal (e.g., DM-RS, CSI-RS, etc.) through a (control) channel for the SL radio link monitoring (RLM) operation and / or SL radio link failure (RLF) operation of the (target) RX UE.

[0331] In addition, in the present disclosure, a receiving UE (i.e., RX UE) can be a UE that sends SL HARQ feedback to a transmitting UE (i.e., TX UE) based on whether data sent by the TX UE is successfully decoded and / or whether a PSCCH (related to PSSCH scheduling) sent by the TX UE is successfully detected / decoded. For example, the RX UE can be a UE that performs SL CSI transmission to the TX UE based on an SL CSI-RS and / or an SL CSI report request indicator received from the TX UE. For example, the RX UE can be a UE that sends an SL (L1) RSRP measurement value measured based on a (predefined) reference signal and / or an SL (L1) RSRP report request indicator received from the TX UE to the TX UE. For example, the RX UE can be a UE that sends its own data to the TX UE. For example, the RX UE can be a UE that performs an SL RLM operation and / or an SL RLF operation based on a (preconfigured) (control) channel and / or a reference signal received from the TX UE through the (control) channel.

[0332] According to an embodiment of the present disclosure, when a receiving UE sends SL HARQ feedback information for a PSSCH (and / or PSCCH) received from a transmitting UE, the following scheme (part) can be considered. For example, the corresponding scheme (part) can be restrictively applied only when the receiving UE has successfully decoded / detected the PSCCH scheduling the PSSCH.

[0333] - Option 1) Send NACK information only when PSSCH decoding / reception fails

[0334] - Option 2) Send ACK information when PSSCH decoding / reception is successful and send NACK information when it fails

[0335] In addition, in the present disclosure, the TX UE can send all or part of the information described below to the RX UE through an SCI. Herein, for example, the TX UE can send all or part of the information described below to the RX UE through a first SCI and / or a second SCI.

[0336] - PSSCH (and / or PSCCH) related resource allocation information (e.g., the number / position of time / frequency resources, resource reservation information (e.g., period))

[0337] - SL CSI report request indicator or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) report request indicator

[0338] - SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI information transmission indicator)) (on PSSCH)

[0339] - Modulation and coding scheme (MCS) information

[0340] - Transmit power information

[0341] - L1 destination ID information and / or L1 source ID information

[0342] - SL HARQ process ID information

[0343] - New data indicator (NDI) information

[0344] - Redundancy version (RV) information

[0345] -(Transport service / packet related) QoS information (e.g., priority information)

[0346] - SL CSI-RS transmission indicator or information about the number of SL CSI-RS antenna ports (to be transmitted)

[0347] - Location information of the TX UE or location (or distance area) information of the target RX UE (for which SL HARQ feedback is requested)

[0348] - Reference signal (e.g., DM-RS, etc.) information related to the decoding and / or channel estimation of the data to be transmitted via PSSCH. For example, the reference signal information can be information related to the pattern of (time-frequency) mapping resources of DM-RS, rank information, antenna port index information, information about the number of antenna ports, etc.

[0349] In addition, in the present disclosure, for example, at least one of SCI, first SCI (level 1 SCI), and / or second SCI (level 2 SCI) can be used to replace / substitute PSCCH, or vice versa. For example, at least one of PSCCH, first SCI, and / or second SCI can be used to replace / substitute SCI, or vice versa. For example, second SCI and / or PSCCH can be used to replace / substitute PSSCH, or vice versa.

[0350] In addition, in the present disclosure, for example, if the SCI configuration field is divided into two groups considering a (relatively) high SCI payload size, the SCI including the first SCI configuration field group may be referred to as the first SCI or the first - numbered SCI, and the SCI including the second SCI configuration field group may be referred to as the second SCI or the second - numbered SCI. For example, the first SCI and the second SCI may be transmitted through different channels. For example, the transmitting UE may send the first SCI to the receiving UE through the PSCCH. For example, the second SCI may be sent to the receiving UE through an (independent) PSCCH, or may be sent in a piggyback manner together with data through the PSSCH.

[0351] In addition, in the present disclosure, for example, "configure" or "define" may mean a (pre -) configuration from a base station or a network. For example, "configure" or "define" may mean a resource - pool - specific (pre -) configuration from a base station or a network. For example, the base station or the network may send information related to "configure" or "define" to the UE. For example, the base station or the network may send information related to "configure" or "define" to the UE through predefined signaling. For example, the predefined signaling may include at least one of RRC signaling, MAC signaling, PHY signaling, and / or SIB.

[0352] In addition, in the present disclosure, for example, "configure" or "define" may mean specifying or configuring through pre - configured signaling between UEs. For example, information related to "configure" or "define" may be sent or received through pre - configured signaling between UEs. For example, the predefined signaling may include at least one of RRC signaling, MAC signaling, PHY signaling, and / or SIB.

[0353] In addition, in the present disclosure, for example, out - of - sync (OOS) and / or in - sync (IS) may replace / substitute for RLF, or vice versa.

[0354] In addition, in the present disclosure, for example, sub - carriers may replace / substitute for resource blocks (RBs), or vice versa. For example, a transport block (TB) or a media access control protocol data unit (MAC PDU) may replace / substitute for a packet or traffic according to the transport layer, or vice versa. For example, a TB may replace / substitute for a code block group (CBG), or vice versa. For example, a destination ID may replace / substitute for a source ID, or vice versa. For example, an L2 ID may replace / substitute for an L1 ID, or vice versa. For example, the L1 ID may be an L1 source ID or an L1 destination ID. For example, the L2 ID may be an L2 source ID or an L2 destination ID.

[0355] In addition, in the present disclosure, for example, the operation of the TX UE to reserve / select / determine retransmission resources may include the operation of the TX UE to reserve / select / determine potential retransmission resources, where the actual use is determined based on the SL HARQ feedback information received from the RX UE.

[0356] In addition, in the present disclosure, a sub-selection window may be replaced / substituted by a selection window and / or a pre-configured number of resource sets within the selection window, or vice versa.

[0357] In addition, in the present disclosure, SL MODE 1 may refer to a resource allocation method or communication method in which the base station directly schedules SL transmission resources for the TX UE through predefined signaling (e.g., DCI or RRC message). For example, SL MODE 2 may refer to a resource allocation method or communication method in which the UE independently selects SL transmission resources from a resource pool pre-configured or configured by the base station or the network. For example, a UE performing SL communication based on SL MODE 1 may be referred to as a MODE 1 UE or a MODE 1 TX UE, and a UE performing SL communication based on SL MODE 2 may be referred to as a MODE 2 UE or a MODE 2 TX UE.

[0358] In addition, in the present disclosure, for example, a dynamic grant (DG) may be replaced / substituted by a configured grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, DG may be replaced / substituted by a combination of CG and SPS grants, or vice versa. For example, CG may include at least one of configured grant (CG) type 1 and / or configured grant (CG) type 2. For example, in CG type 1, the grant may be provided by RRC signaling and may be stored as a configured grant. For example, in CG type 2, the grant may be provided by PDCCH and may be stored or deleted as a configured grant based on L1 signaling indicating activation or deactivation of the grant. For example, in CG type 1, the base station may allocate periodic resources to the TX UE through an RRC message. For example, in CG type 2, the base station may allocate periodic resources to the TX UE through an RRC message, and the base station may dynamically activate or deactivate the periodic resources through DCI.

[0359] In addition, in the present disclosure, a channel may be replaced / substituted by a signal, or vice versa. For example, the transmission / reception of a channel may include the transmission / reception of a signal. For example, the transmission / reception of a signal may include the transmission / reception of a channel. For example, a broadcast may be replaced / substituted by at least one of unicast, multicast, and / or broadcast, or vice versa. For example, a broadcast type may be replaced / substituted by at least one of unicast, multicast, and / or broadcast, or vice versa. For example, a broadcast or a broadcast type may include unicast, multicast, and / or broadcast.

[0360] In addition, in the present disclosure, time slots or symbols can be used to replace / substitute resources, or vice versa. For example, resources can include time slots and / or symbols.

[0361] In addition, in the present disclosure, at least one of logical channel priority (LCP), latency, reliability, minimum required communication range, per-packet priority (PPPP), sidelink radio bearer (SLRB), QoS profile, QoS parameters, and / or requirements can be used to replace / substitute priority, or vice versa.

[0362] In addition, in the present disclosure, for example, for ease of description, the (physical) channel used when the RX UE sends at least one of the following information to the TX UE can be referred to as the PSFCH.

[0363] -SL HARQ feedback, SL CSI, SL (L1) RSRP

[0364] In addition, when performing sidelink communication, the method by which the transmitting UE reserves or pre-determines transmission resources for the receiving UE can be typically as follows.

[0365] For example, the transmitting UE can reserve transmission resources based on a chain. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE can send the location information for less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, for example, the SCI can include the location information for less than K transmission resources. Alternatively, for example, if the transmitting UE reserves K transmission resources related to a specific TB, the transmitting UE can send the location information for less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI can include the location information for less than K transmission resources. In this case, for example, by using one SCI sent by the transmitting UE at any (or specific) transmission time or time resource to signal only the location information for less than K transmission resources to the receiving UE, performance degradation caused by an excessive increase in the payload of the SCI can be prevented.

[0366] Figure 15 A method by which a UE having reserved transmission resources notifies another UE of the transmission resources based on an embodiment of the present disclosure is shown. Figure 15 The embodiments can be combined with various embodiments of the present disclosure.

[0367] Specifically, for example, Figure 15(a) shows a method of performing chain-based resource reservation by a transmitting UE by sending / signaling the location information of (up to) two transmission resources to a receiving UE via one SCI when K = 4. For example, Figure 15 (b) shows a method of performing chain-based resource reservation by a transmitting UE by sending / signaling the location information of (up to) three transmission resources to a receiving UE via one SCI when K = 4. For example, referring to Figure 15 (a) and (b), the transmitting UE can send / signal only the location information of the fourth (or last) transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH. For example, referring to Figure 15 (a), the transmitting UE can not only send / signal the location information of the fourth transmission-related resource to the receiving UE, but also additionally send / signal the location information of the third transmission-related resource via the fourth (or last) transmission-related PSCCH. For example, referring to Figure 15 (b), the transmitting UE can not only send / signal the location information of the fourth transmission-related resource to the receiving UE, but also additionally send / signal the location information of the second transmission-related resource and the third transmission-related resource via the fourth (or last) transmission-related PSCCH. In this case, for example, in Figure 15 (a) and (b), if the transmitting UE can send / signal only the location information of the fourth transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH, the transmitting UE can set or specify the field / bit of the location information of the unused or remaining transmission resources as a preconfigured value (e.g., 0). For example, in Figure 15 (a) and (b), if the transmitting UE can send / signal only the location information of the fourth transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH, the transmitting UE can set or specify the field / bit of the location information of the unused or remaining transmission resources as a preconfigured status / bit value indicating / representing the last transmission (among 4 transmissions).

[0368] In addition, for example, the transmitting UE may reserve transmission resources based on blocks. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the position information of the K transmission resources to the receiving UE by sending an SCI to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the position information of the K transmission resources. For example, if the transmitting UE reserves K transmission resources related to a specific TB, the transmitting UE may send the position information of the K transmission resources to the receiving UE by sending an SCI to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the position information of the K transmission resources. For example, Figure 15 (c) of Figure 15 shows a method for the transmitting UE to perform block-based resource reservation by signaling the position information of 4 transmission resources to the receiving UE via one SCI in the case where the value of K = 4.

[0369] For example, when performing multi-consecutive slot transmission (MCSt) in an unlicensed band, it may be configured such that the following rules (some or all of the rules) can be applied. For example, MCSt may refer to a transmission that satisfies the condition that the time interval between adjacent transmissions (or between transmission resources) is less than or equal to a preconfigured threshold (e.g., 16 milliseconds or 16 microseconds). Here, for example, the following rules (some or all of the rules) may be (limitedly) applied to the transmission between multiple UEs as the case of MCST execution.

[0370] For example, the coordinating UE may schedule the transmission resources for different UEs in a manner such as DCI format 2-0 or by exchanging auxiliary information (related to resource selection) (e.g., inter-UE coordination (IUC) information) so that a form of MCSt can be performed between different UEs.

[0371] For example, if UE-A indicates COT information and / or PSSCH time resources to multiple UEs respectively, the processing time budget may be insufficient. In other words, considering that the maximum COT duration length is several milliseconds, UE-A that shares relevant information by sending PSCCH / PSSCH to each UE may be insufficient.

[0372] For example, UE-A may indicate common COT information and / or PSSCH time resources and / or M_ID offset values and / or a set of scheduling start UEs and / or M_ID values to multiple UEs. For example, the M_ID value may be interpreted as a UE identifier (ID) provided by the upper layer (related to group services).

[0373] For example, a UE that has received information from UE-A may choose to share time resources within the COT and / or PSSCH resources within the PSSCH time resource. For example, in ascending order, starting from the UE whose M_ID value is equal to the M_ID offset provided by UE-A, the first time resource within the COT and / or the first PSSCH time resource may be chosen to be shared as the resource for PSSCH transmission. For example, the UE with the next M_ID value may choose to share the next time resource within the COT and / or the next PSSCH time resource of the first PSSCH time resource as the PSSCH transmission resource, and the above operation may be repeated by incrementing the M_ID value for the resources during the remaining COT duration. For example, the information for M_ID may be replaced by the third index of the UE that has received the information from UE-A.

[0374] For example, UE-A may send PSCCH / PSSCH to multiple UEs in the form of broadcast and / or multicast, and provide information for COT information and / or the PSCCH time resource to be applied to each of the receiving UEs. For example, in order to differently indicate the information for the destination UE for the above information, UE-A may separately indicate the source ID and / or the destination ID for each of the above information. For example, the source ID may correspond to the transmission of UE-A, and the destination ID may correspond to the UE that receives the transmission of UE-A. For example, the source ID and / or the destination ID may correspond to the transmission that is to use the indicated time resource. For example, the M_ID information may be separately indicated by UE-A to differently indicate the information for the destination UE for the above information.

[0375] For example, when a UE selects a transmission resource, it may be configured to use the reserved resources of other UEs to reduce the time gap (to a preconfigured threshold or less).

[0376] For example, a UE may select PSCCH / PSSCH transmission resources for all or part of the RB set in the time slot immediately before and / or after the PSCCH / PSSCH resource received by the UE. For example, the PSCCH / PSSCH transmission of a UE may include the UE that has received the PSCCH / PSSCH as the recipient. For example, it may be determined whether it is the received PSCCH / PSSCH resource based on the destination ID. For example, it may be determined whether the PSCCH / PSSCH transmission of a UE includes a specific recipient based on the source ID and / or the destination ID.

[0377] For example, the third UE may be configured to perform the role of filling the gap between two transmissions (using a preconfigured form of signal (e.g., virtual signal)).

[0378] For example, if a third UE determines that there is a time gap greater than or equal to a specific level in the reserved resources between two specific UEs, and / or if the transmissions of two UEs are receivers of each other, and / or if the third UE belongs to the same UE group as the two UEs, the third UE may perform sidelink transmission therebetween so as to align the time gap between the reserved resources of the transmissions of the two UEs to a level less than or equal to the specific level. For example, the RB set of the transmissions between two UEs and / or the transmission resources performed by the third UE may overlap and / or be the same. For example, the transmission reserved resources of two UEs may exist within the same shared COT duration. For example, the sidelink transmission to be filled between the transmissions of two UEs may make at least one of the two UEs a receiver.

[0379] For example, in an embodiment of the present disclosure, the COT information at least includes the shared COT start time point and / or the shared COT end time point and / or the length of the shared COT duration and / or information (e.g., threshold) for the CAPC value that can be used in the shared COT and / or whether CP extension is applied and / or the application method (e.g., length) of puncturing and / or whether multiple start time points for PSCCH / PSSCH are applied and / or the start time point information is used and / or the congestion control parameters that can use the shared COT duration and / or the SL priority value information that can use the shared COT duration and / or the RB set information that can use the shared COT duration. For example, a UE that has received the shared COT information may perform type 2 series of channel access within the shared COT duration, which is limited to the case where the transmission of the UE satisfies the condition that the shared COT can be used.

[0380] For example, in an embodiment of the present disclosure, whether the UE provides COT information and the method of providing COT information and / or whether it indicates the PSSCH time resource and the method of indicating the PSSCH time resource may be different for each CAPC value and / or CAPC table used for COT initiation and / or for each COT duration length.

[0381] For example, the scheme of providing time domain resources in the embodiments of the present disclosure is only an example, and the idea of the present disclosure can be extended and applied to the scheme of providing time domain resources and / or frequency domain resources.

[0382] Figure 16 The resource configuration of the MCSt when the coordination device schedules the MCSt resources according to an embodiment of the present disclosure is shown. Figure 16 The embodiments can be combined with various embodiments of the present disclosure.

[0383] Now refer to Figure 16, which shows a coordination device and a first device and a second device to which the coordination device provides MCSt resources. For example, the coordination device may schedule the resources used by the first device and the resources used by the second device to form MCSt resources. For example, the union of the resources determined to be used by the first device and the resources determined to be used by the second device may be MCSt resources. For example, the time interval between the resources including MCSt resources may be 16 microseconds or less.

[0384] For example, for the resources to be used by the first device and the second device for SL transmission, the coordination device may perform scheduling of the resources by sending information to the first device and the second device respectively. For example, the first device and the second device may each perform SL transmission based on the resources scheduled by the coordination device. For example, since the time interval between MCSt resources is 16 microseconds or less, among the earliest resources of the MCSt resources (i.e., the earliest resources among the resources scheduled for the first device), if channel sensing for CAP is performed and the result is idle, then in the subsequent resources (i.e., the MCSt resources after the earliest resources), the channel sensing operation may be omitted and SL transmission may be immediately performed.

[0385] Figure 17 Shows the resource configuration when forming MCSt resources based on ID set information and IDs according to an embodiment of the present disclosure. Figure 17 The embodiments of can be combined with various embodiments of the present disclosure.

[0386] Refer to Figure 17 , which shows that the coordination device schedules the resources of the first device to the fourth device to form MCSt resources, and the first device to the fourth device use the MCSt resources by receiving resource scheduling from the coordination device.

[0387] For example, the coordination device may send ID set information to the first device or the fourth device. For example, the ID set information may include information for an ID set, including IDs related to the scheduling of MCSt resources. For example, the set of IDs may include different IDs respectively related to the first device to the fourth device. For example, in this example, the ID set may be {First ID, Second ID, Third ID, Fourth ID}. For example, in this example, it is assumed that the first ID to the fourth ID are ascending integers. For example, at least the first ID to the fourth ID may be integers with ascending order.

[0388] For example, the coordination device may send information for ID offset and ID set information to the first device or the fourth device. For example, in this embodiment, the ID offset is assumed to be the same value as the first ID. With the ID offset, the first device can know that its ID (the first ID) is equal to the ID offset, so it is the device that selects the earliest resource among the resources including MCSt resources.

[0389] For example, the coordination device may send information about a candidate resource set including MCSt resources to the first to fourth devices. Here, for example, since the first ID related to itself is the same as the ID offset, the first device may determine a resource (the earliest resource in the candidate resource set) and a resource index such that the resource index (an integer in ascending order, assuming the earliest resource is zero) MOD "the number of IDs in the ID set" = 0.

[0390] For example, the second device related to the second ID (e.g., the first ID + 1) adjacent to the first ID in the ID set may determine to use a resource in the candidate resource set whose resource index satisfies the resource index MOD "the number of IDs in the ID set" = 1.

[0391] For example, the third device related to the third ID (e.g., the second ID + 1) adjacent to the second ID in the ID set may determine to use a resource in the candidate resource set whose resource index satisfies the resource index MOD "the number of IDs in the ID set" = 2.

[0392] For example, the fourth device related to the fourth ID (e.g., the third ID + 1) adjacent to the third ID in the ID set may determine to use a resource in the candidate resource set whose resource index satisfies the resource index MOD "the number of IDs in the ID set" = 3.

[0393] For example, the union of the resources determined to be used by the first to fourth devices may include MCSt resources. For example, the time interval between resources including MCSt resources may be 16 microseconds or less. For example, since the time interval between resources in MCSt resources is 16 microseconds or less, in the earliest resource of the MCSt resources (i.e., the earliest resource among the resources scheduled for the first device), if the channel sensing for CAP is performed and the result is idle, then in the subsequent resources (i.e., the resources in the MCSt resources after the earliest resource), the channel sensing operation may be omitted and the SL transmission may be immediately performed.

[0394] For example, at least one of the elements / parameters for the following items (or according to the following items) can be specifically (or, differently, or, independently) configured / enabled (and / or the application of the above rules can be restricted) as to whether to apply the above rules (and / or the values of the parameters related to the proposed solutions / rules of the present disclosure): service type (and / or (LCH or service) priority and / or QoS requirements (e.g., latency, reliability, minimum communication range) and / or PQI parameter) (and / or LCH / MAC PDU (transmission) enabling HARQ (and / or disabling HARQ) and / or CBR measurement value of the resource pool and / or SL broadcast type (e.g., unicast, multicast, broadcast) and / or SL multicast HARQ feedback option (e.g., only NACK feedback, ACK / NACK feedback, only NACK feedback based on TX-RX distance) and / or SL mode 1 CG type (e.g., SL CG type 1 / 2) and / or SL mode type (e.g., mode 1 / 2) and / or resource pool and / or whether it is a resource pool configured with PSFCH resources and / or the case where periodic resource reservation operations (and / or aperiodic resource reservation operations) are enabled / configured (or not enabled / not configured) on the resource pool and / or the case where partial sensing operations (and / or random resource selection operations (and / or full sensing operations)) are enabled / configured (or not enabled / not configured) on the resource pool and / or source (L2) ID (and / or destination (L2) identification) and / or PC5 RRC connection link and / or SL link and / or connection state (with the base station) (e.g., RRC connection state, idle state, inactive state) and / or SL HARQ process (ID) and / or whether SL DRX operation (of the transmitting UE or the receiving UE) has been performed and / or whether it is an energy-saving (transmitting or receiving) UE and / or the case where PSFCH TX and PSFCH RX (and / or multiple PSFCH transmissions (whose UE capabilities are exceeded)) overlap (and / or the case of omitting PSFCH transmission (and / or PSFCH reception)) (from the perspective of a specific UE) and / or the case where the receiving UE actually (continuously) receives (re)transmissions of PSCCH (and / or PSSCH) from the transmitting UE and / or the case where the (transmitting) UE performing packet transmission (and / or (re)selection of transmission resources) performs power-saving operations (and / / or SL DRX operations) and / or the case where the target (receiving) UE of the transmitted packet performs power-saving operations (and / or SL DRX operations) and / or the case where the remaining PDB value related to the transmitted packet is greater than or equal to (or less than or equal to) a preconfigured threshold and / or the case of (TB-related) initial transmission (and / or retransmission) and / or the case of applying an interleaving-based structure (RB) and / or the case of performing a (preconfigured) channel access type (e.g., type 1, type 2A, type 2B, type 2C, semi-static channel occupancy) and / or the case of performing a (preconfigured) SL channel / signal (e.g.,The cases of transmission / reception of SL SSB, PSCCH, PSSCH, PSFCH, etc., and / or RB sets (and / or channels and / or carriers) for which channel access operations are performed in the unlicensed band, and / or COT (channel occupancy time), and / or TX bursts, and / or discovery bursts, etc. Additionally, combinations of the proposed schemes (and / or proposed rules and / or embodiments) described in the present disclosure may be applied.

[0395] Furthermore, the term "configured" (or "specified") in the present disclosure may be broadly interpreted as a form of notification to the UE via a predefined (physical layer or higher layer) channel / signal (e.g., SIB, RRC, MAC CE) (and / or, in a form supported by pre-configuration, and / or, in a form of notification to another UE via a predefined (physical layer or higher layer) channel / signal (e.g., SL MAC CE, PC5 RRC)), etc.

[0396] Moreover, the term "PSFCH" in the present disclosure may be (mutually) extended to be interpreted as "(NR or LTE) PSSCH (and / or (NR or LTE) PSCCH) (and / or (NR or LTE) SL SSB (and / or UL channel / signal))".

[0397] In addition, the proposed schemes in the present disclosure may be combined with each other and extended (into a new form of scheme) for use. Moreover, in the present disclosure, the term "active time" (and / or "on duration") in the present disclosure may be (mutually) extended to be "on duration" (and / or "active time").

[0398] According to an embodiment of the present disclosure, the scheme for determining the contention window size may be a scheme that mixes and matches multiple schemes. For example, the scheme may be a scheme that maintains the CW value for all or each CAPC based on the determined result of the representative HARQ-ACK value of each group when there are multiple reference SL HARQ-ACK feedback groups p and / or a scheme that increases the CW value for all or each CAPC to the next allowed value if the result is not initialized to the initial value. p

[0399] For example, if there are multiple factors referred to when configuring the contention window size, and if the result of increasing the CW value to the next allowed value and maintaining or initializing the CW value occurs simultaneously as the determined result of each factor, the CW value may be maintained p and / or the CW value may be initialized to the minimum value. p p p

[0400] For example, if there are multiple factors to be referred to when configuring the contention window size, and if increasing the CW p value to the next allowed value and maintaining or initializing the CW p value occur simultaneously as a result of the determination for each factor, then the CW p value can be increased to the next allowed value.

[0401] According to one embodiment of the present disclosure, PSCCH / PSSCH that is referred to determine the contention window size can be received within a specific time interval. For example, the specific time interval can be within the earliest SL channel occupancy interval after the UE last updates its CW p value.

[0402] According to one embodiment of the present disclosure, the operation of initializing the CW p to the minimum value can be replaced by another specific value (e.g., a (pre)-configured value), and / or the specific value can be configured differently according to the factors that control the size of the contention window.

[0403] In various embodiments of the present disclosure, for example, the reference duration can be i) the interval from the start of channel occupancy of the COT occupied by the UE (for sidelink communication) and / or the COT occupied by the base station (for sidelink communication) to the end of the first time slot in which an actual specific sidelink transmission is performed for all allocated resources for sidelink transmission, or ii) to the end of the first transmission burst including the actual specific sidelink transmission for all allocated resources for sidelink transmission, or iii) to an earlier time point between the above endpoints. For example, the specific sidelink transmission can be a PSCCH / PSSCH transmission for unicast and / or multicast and / or a PSCCH / PSSCH enabling SL HARQ-ACK feedback. For example, when the COT is initialized, the length of the reference interval can be (pre)-configured according to the resource pool of the UE's SL transmission and / or the SL priority value.

[0404] In various embodiments of the present disclosure, different combinations of the above can be used, for example, according to whether the COT duration is initialized by the UE or the base station.

[0405] In various embodiments of the present disclosure, for example, the size of the contention window for the sidelink may be adjusted for each unicast session (group) and / or each broadcast type and / or each transmission priority value and / or each SL transmission with SL HARQ-ACK feedback enabled and / or each SL HARQ-ACK feedback option, respectively. For example, the process of adjusting the size of the contention window may be performed for each case where an SL is sent from a first UE to a second UE and an SL is sent from the first UE to a third UE, respectively. For example, when adjusting the size of the contention window based on HARQ-ACK, the HARQ-ACK may be limited to a specific broadcast type and / or a specific unicast session.

[0406] In various embodiments of the present disclosure, for example, the size of the contention window for the sidelink may be adjusted based only on the PSSCH with SL HARQ-ACK feedback enabled and / or a specific broadcast type (e.g., unicast or multicast).

[0407] In various embodiments of the present disclosure, for example, initializing the value of CW_p to the corresponding minimum value may be applied by replacing it with a value obtained by reducing the value of CW_p to a previously allowed value.

[0408] For example, when accessing a type 1 SL channel, the size of the contention window may be preconfigured for each priority category and / or each SL priority and / or each resource pool. For example, in any of the above cases, the UE may not perform an operation of separately adjusting the size of the contention window.

[0409] In various embodiments of the present disclosure, for example, in the channel sensing operation according to the channel access type, the threshold for determining whether the channel is busy or idle may be predefined and / or (pre)configured for each resource pool, and / or each SL BWP, and / or each set of RBs, and / or each carrier, and / or each SL transmission priority, and / or each representative transmission power value (range), and / or each congestion control level.

[0410] The various embodiments of the present disclosure can be applied in different combinations of the above, for example, according to whether the transmission is within or outside the COT (Channel Occupancy Time). The various embodiments of the present disclosure can be applied in different combinations according to the form of the COT (e.g., semi-static or time-varying). For example, in a semi-static COT, it is possible to ensure that there are no other technologies sharing the same channel or RB set for a period of time, such as by adjustment. For example, in a semi-static COT for SL transmission, it is possible to ensure that there are no DL and / or UL transmissions sharing the same channel or RB set within a specific period of time, such as by adjustment. For example, in a semi-static COT, for DL transmission and / or UL transmission, it is possible to ensure that there are no SL transmissions sharing the same channel or RB set within a specific period of time. For example, in a semi-static COT, it is possible to ensure that there are no SL transmissions based on (re)selection of SL mode 2 resources sharing the same channel or RB set within a specific period of time, such as by adjustment.

[0411] For example, the length of the fixed frame period (FFP) and / or the time axis offset value for the semi-static COT duration can be (pre)-configured per resource pool and / or per SL BWP and / or per carrier and / or per RB set and / or per congestion control level and / or per SL transmission priority value. For example, the length of the fixed frame period (FFP) and / or the time axis offset value for the semi-static COT duration can be configured via PC5-RRC signaling between UEs. For example, the (pre)-configured FFP can be rewritten via PC5-RRC signaling. For example, the FFP configured for PC5-RRC can be limitedly used for unicast transmission corresponding to the PC5-RRC connection. The various embodiments of the present disclosure can be applied in the form of different combinations of the above according to whether there is protection between different carriers and RB sets, or according to regulations.

[0412] Although the various embodiments of the present disclosure describe changing the contention window size for all CAPCs, the idea of the present disclosure can be extended to include changing the contention window size per specific CAPC or SL priority value.

[0413] In the various embodiments of the present disclosure, for example, according to the type of channel access and whether / how the type of channel access is indicated, the scheme can be applied differently per SL channel. In the various embodiments of the present disclosure, for example, regarding the type of channel access and whether / how it is indicated, the above scheme can be applied differently according to the type of information included in the SL channel.

[0414] For example, the proposed method can be applied to the apparatus described below. First, the processor 202 of the receiving UE can configure at least one BWP. Then, the processor 202 of the receiving UE can control the transceiver 206 of the receiving UE to receive sidelink-related physical channels and / or sidelink-related reference signals from the transmitting UE on at least one BWP.

[0415] For example, an LBT operation can be performed to protect the transmission opportunity in the unlicensed band. The LBT operation is to perform channel sensing within a specific interval (contention window) before the resource for the attempted transmission, and then perform the transmission based on the resource only when the result is idle. In SL-U, the LBT operation can be performed in units of RB sets. For example, the LBT operation can be included in the channel sensing for the type 1 (or type 2) channel access procedure (CAP).

[0416] MCSt may refer to a transmission that omits the LBT operation (i.e., channel sensing) for subsequent resources except for the first resource by allowing transmissions to be performed in consecutive time slots in the unlicensed band. To reduce the overhead caused by performing the LBT operation, transmissions based on the multi-consecutive time slot transmission (MCSt) structure between different UEs can be considered.

[0417] In this case, if different UEs within the shared COT (received from a specific UE) determine the positions of the time resources for their transmissions without any rules, problems may occur in the case where the MCSt structure is not formed or in the case where (some or all) (time and / or frequency) transmission resources overlap (e.g., half-duplex, collision, etc.).

[0418] According to an embodiment of the present disclosure, the first device can receive information on resource selection for MCSt from the second device, and based on the information and several conditions, can select resources so that MCSt can be performed. That is, in order to enable transmissions based on the MCSt structure between different UEs, the UE can provide information / parameters (e.g., M_ID, PSSCH time slot) for determining the positions of the time resources to be used by different UEs (within the COT generated / shared by it) for each transmission.

[0419] For example, according to an embodiment of the present disclosure, by allowing multiple UEs to select multiple resources for MCSt, MCSt can be successfully performed, and by allowing the selection of multiple resources for MCSt based on various conditions, conflicts between multiple UEs participating in MCSt can be avoided. In other words, in the MCSt operation, by allowing different UEs to determine the positions of time resources for their transmissions within a shared COT (received from a specific UE) according to specific rules, an MSCt structure can be normally formed, and problems such as (some or all) (time and / or frequency) transmission resource overlaps (e.g., half-duplex, conflicts, etc.) can be prevented from occurring.

[0420] Figure 18 A process of a first device performing wireless communication according to an embodiment of the present disclosure is shown. Figure 18 Embodiments of can be combined with various embodiments of the present disclosure.

[0421] Referring to Figure 18 , in step S1810, the first device may receive information related to resource selection for multiple resources for multi-consecutive time slot transmission (MCSt) from a second device. In step S1820, the first device may include a first resource in the multiple resources by selecting the first resource based on the information. In step S1830, the first device may send sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) based on the first resource through a physical sidelink control channel (PSCCH). In step S1840, the first device may send a media access control (MAC) protocol data unit (PDU) through the PSSCH based on the first resource. For example, MCSt may include the transmission of MAC PDUs, and the interval between multiple resources may be less than or equal to 16 microseconds.

[0422] For example, the second device may be a coordinating device.

[0423] For example, the MAC PDU may be sent to a third device.

[0424] For example, the information may be received through an inter-UE coordination (IUC) message.

[0425] For example, the information may indicate the selection of the first resource.

[0426] For example, based on the interval between multiple resources being 16 microseconds, for resources excluding the earliest resource among the multiple resources, channel sensing for the channel access process (CAP) may not be performed.

[0427] For example, the information may include information about the channel occupancy time (COT).

[0428] For example, additionally, the first device may obtain a first device identifier (ID) associated with the first device. For example, the information may include information for ID offset and information for a set of device IDs including the first ID.

[0429] For example, the information may include a set of candidate resources for resource selection, the set of candidate resources including a first resource, and based on the set of device IDs and the first ID, the first resource may be selected from the set of candidate resources.

[0430] For example, the first resource may be a resource corresponding to the order of the first device ID offset from the ID among at least one of the candidate resources within the set of candidate resources.

[0431] For example, the information may be received according to a broadcast or multicast scheme.

[0432] For example, based on the reservation of a second resource for a third device, the time gap between the third resource and the first resource among a plurality of resources may be reduced.

[0433] For example, a virtual signal may be sent based on the second resource.

[0434] The above embodiments may be applied to various devices described below. First, the processor 102 of the first device 100 may control the transceiver 106 to receive information related to resource selection for a plurality of resources for multi-consecutive time slot transmission (MCSt) from the second device 200. And, the processor 102 of the first device 100 may include the first resource in the plurality of resources by selecting the first resource based on the information. And, the processor 102 of the first device 100 may control the transceiver 106 to send sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) based on the first resource through a physical sidelink control channel (PSCCH). And, the processor 102 of the first device 100 may control the transceiver 106 to send a media access control (MAC) protocol data unit (PDU) based on the first resource through the PSSCH. For example, MCSt may include the transmission of a MAC PDU, and the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0435] According to an embodiment of the present disclosure, a first apparatus for performing wireless communication may be provided. For example, the first apparatus may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first apparatus to perform operations. For example, the operations may include: receiving, from a second apparatus, information related to resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt); including a first resource in the plurality of resources by selecting the first resource based on the information; transmitting sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) via a physical sidelink control channel (PSCCH) based on the first resource; and transmitting a media access control (MAC) protocol data unit (PDU) via the PSSCH based on the first resource, wherein the MCSt may include transmission of the MAC PDU, and wherein an interval between the plurality of resources may be less than or equal to 16 microseconds.

[0436] For example, the second apparatus may be a coordination apparatus.

[0437] For example, the MAC PDU may be transmitted to a third apparatus.

[0438] For example, the information may be received via a UE-to-UE coordination (IUC) message.

[0439] For example, the information may indicate selection of the first resource.

[0440] For example, based on the interval between the plurality of resources being 16 microseconds, channel sensing for a channel access procedure (CAP) may not be performed for resources excluding the earliest resource among the plurality of resources.

[0441] For example, the information may include information on a channel occupancy time (COT).

[0442] For example, additionally, the operations may further include: obtaining a first apparatus identifier (ID) related to the first apparatus. For example, the information may include information on an ID offset and information on a set of device IDs including the first ID.

[0443] For example, the information may include a set of candidate resources for resource selection, the set of candidate resources including the first resource, and based on the set of device IDs and the first ID, the first resource may be selected from the set of candidate resources.

[0444] For example, the first resource may be a resource corresponding to an order of a first device ID from the ID offset among the set of device IDs among at least one of the candidate resources within the set of candidate resources.

[0445] For example, the information may be received according to a broadcast or multicast scheme.

[0446] For example, based on the reservation of the second resource for the third device, the time gap between the third resource and the first resource among the plurality of resources may be reduced.

[0447] For example, a virtual signal may be transmitted based on the second resource.

[0448] According to one embodiment of the present disclosure, an apparatus adapted to control a first user equipment (UE) may be provided. For example, the apparatus may include: at least one processor; and at least one memory operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first UE to perform operations. For example, the operations may include: receiving, from a second UE, information related to a resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt); including a first resource in the plurality of resources by selecting the first resource based on the information; transmitting, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) via a physical sidelink control channel (PSCCH); and transmitting, based on the first resource, a media access control (MAC) protocol data unit (PDU) via the PSSCH, where the MCSt may include the transmission of the MAC PDU, and where the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0449] According to one embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions that, when executed, cause a first device to: receive, from a second device, information related to a resource selection for a plurality of resources for multi-consecutive slot transmission (MCSt); include a first resource in the plurality of resources by selecting the first resource based on the information; transmit, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) via a physical sidelink control channel (PSCCH); and transmit, based on the first resource, a media access control (MAC) protocol data unit (PDU) via the PSSCH, where the MCSt may include the transmission of the MAC PDU, and where the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0450] Figure 19 A process of a second device performing wireless communication according to one embodiment of the present disclosure is shown. Figure 19 Embodiments of may be combined with various embodiments of the present disclosure.

[0451] Referring to Figure 19, in step S1910, the second device may send information related to resource selection for a plurality of resources for multi - continuous - slot transmission (MCSt) to the first device. For example, the first device may include a first resource in the plurality of resources based on the information. Based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) may be sent via a physical sidelink control channel (PSCCH). Based on the first resource, a media access control (MAC) protocol data unit (PDU) may be sent via the PSSCH. MCSt may include the transmission of the MAC PDU, and the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0452] For example, the information may indicate the selection of the first resource.

[0453] The above - described embodiments may be applied to various devices described below. First, the processor 202 of the second device 200 may control the transceiver 206 to send information related to resource selection for a plurality of resources for multi - continuous - slot transmission (MCSt) to the first device 100. For example, the first device 100 may include a first resource in the plurality of resources based on the information. Based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) may be sent via a physical sidelink control channel (PSCCH). Based on the first resource, a media access control (MAC) protocol data unit (PDU) may be sent via the PSSCH. MCSt may include the transmission of the MAC PDU, and the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0454] According to an embodiment of the present disclosure, a second device for performing wireless communication may be provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory. The at least one memory is operatively connected to the at least one processor and stores instructions that, when executed by the at least one processor, cause the second device to perform operations. For example, the operations may include: sending information related to resource selection for a plurality of resources for multi - continuous - slot transmission (MCSt) to the first device; wherein the first device may include a first resource in the plurality of resources based on the information; wherein, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) may be sent via a physical sidelink control channel (PSCCH); wherein, based on the first resource, a media access control (MAC) protocol data unit (PDU) may be sent via the PSSCH; wherein MCSt may include the transmission of the MAC PDU; and wherein the interval between the plurality of resources may be less than or equal to 16 microseconds.

[0455] For example, the information may indicate the selection of the first resource.

[0456] The various embodiments of the present disclosure can be combined with each other.

[0457] Hereinafter, devices to which the various embodiments of the present disclosure can be applied will be described.

[0458] The various descriptions, functions, processes, proposals, methods, and / or operation flows of the present disclosure described in this document can be applied to, but are not limited to, various fields that require wireless communication / connection (e.g., 5G) between devices.

[0459] Hereinafter, a more detailed description will be given with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or functional blocks.

[0460] Figure 20 A communication system 1 according to an embodiment of the present disclosure is shown. Figure 20 The embodiments of can be combined with the various embodiments of the present disclosure.

[0461] Referring to Figure 20 , a communication system 1 to which the various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, the 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. The wireless device may include, but is not limited to, a robot 100a, vehicles (100b-1, 100b-2), an extended reality (XR) device (100c), a handheld device 100d, a household appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Herein, the vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television, a smart phone, a computer, a wearable device, a household appliance device, a digital sign, a vehicle, a robot, etc. The handheld device may include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), and a computer (e.g., a notebook). The household appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include sensors and smart meters. For example, the BS and the network may be implemented as wireless devices, and a specific wireless device (200a) may operate as a BS / network node with respect to other wireless devices.

[0462] Here, in addition to LTE, NR, and 6G, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may also include NarrowBand Internet of Things (NB-IoT) for low-power communication. In this case, for example, the NB-IoT technology may be an example of a 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 above names. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology may be an example of an LPWAN and may be referred to by various names including Enhanced Machine-Type Communication (eMTC), etc. For example, the LTE-M technology may be implemented as at least any 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 above names. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, Low-Power Wide-Area Network (LPWAN), and ZigBee considering low-power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a Personal Area Network (PAN) related to small / low-power digital communication based on various standards including IEEE 802.15.4, etc., and may be referred to by various names.

[0463] The wireless devices 100a to 100f may be connected to the network 300 via the BS200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., Vehicle-to-Vehicle (V2V) / Vehicle-to-Everything (V2X) communication). IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0464] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Here, the wireless communication / connection can be established through 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, integrated access and backhaul (IAB)). The wireless devices and the BS / wireless devices can send / receive radio signals to / from each other through wireless communication / connections 150a and 150b. For example, the wireless communication / connections 150a and 150b can send / receive signals through various physical channels. To this end, at least a part of various configuration information configuration processes, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for sending / receiving radio signals can be performed based on various proposals of the present disclosure.

[0465] Figure 21 A wireless device according to an embodiment of the present disclosure is shown. Figure 21 Embodiments of can be combined with various embodiments of the present disclosure.

[0466] Referring to Figure 21 , the first wireless device 100 and the second wireless device 200 can send radio signals through various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} can correspond to Figure 20 {wireless device 100x and BS200} and / or {wireless device 100x and wireless device 100x} in

[0467] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and / or one or more antennas (antenna units) 108. The (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then transmit radio signals including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive radio signals including second information / signals through the transceivers 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102, and may store various information related to the operations of the (one or more) processors 102. For example, the (one or more) memories 104 may store software codes including commands for executing a part or all of the processing controlled by the (one or more) processors 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. Here, the (one or more) processors 102 and the (one or more) memories 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The (one or more) transceivers 106 may be connected to the (one or more) processors 102, and transmit and / or receive radio signals through the (one or more) antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The (one or more) transceivers 106 may be used interchangeably with the (one or more) radio frequency (RF) units. In this disclosure, the wireless device may represent a communication modem / circuit / chip.

[0468] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then transmit radio signals including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive radio signals including fourth information / signals through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, the (one or more) memories 204 may store software codes including commands for executing a part or all of the processing controlled by the (one or more) processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. Here, the (one or more) processors 202 and the (one or more) memories 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The (one or more) transceivers 206 may be connected to the (one or more) processors 202, and transmit and / or receive radio signals through the (one or more) antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The (one or more) transceivers 206 may be used interchangeably with the (one or more) RF units. In the present disclosure, the wireless device may represent a communication modem / circuit / chip.

[0469] Next, the hardware components of wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by one or more processors 102 and 202, but are not limited to this. For example, one or more processors 102 and 202 may implement one or more layers (such as 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, processes, proposals, methods, and / or operation procedures disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document. One or more processors 102 and 202 may generate signals (such as baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation procedures 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 (such as baseband signals) from one or more transceivers 106 and 206, and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document.

[0470] One or more processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. 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 operation procedures disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. The firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation procedures 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, and thus be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0471] 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 constituted by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside 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 through various techniques such as wired or wireless connections.

[0472] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flows 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 operation flows 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 send and receive radio signals. For example, one or more processors 102 and 202 may execute controls such that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may execute controls 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 send and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flows 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 to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0473] Figure 22 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 22 Embodiments of may be combined with various embodiments of the present disclosure.

[0474] Referring to Figure 22 , the signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. Operations / functions of may be performed, not limited to Figure 22 the processors (102, 202) and / or transceivers (106, 206) of Figure 21 It may be throughFigure 21 implemented by the processors (102, 202) and / or transceivers (106, 206) Figure 21 of the hardware components. For example, the blocks 1010 to 1060 can be implemented by Figure 21 the processors (102, 202). Alternatively, the blocks 1010 to 1050 can be implemented by Figure 21 the processors (102, 202), and the block 1060 can be implemented by Figure 21 the transceivers (106, 206).

[0475] The codeword can be converted into a radio signal via Figure 22 the signal processing circuit 1000. Here, the codeword is a sequence of coded bits of an information block. The information block can include transport blocks (e.g., UL-SCH transport blocks, DL-SCH transport blocks). The radio signal can be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0476] Specifically, the codeword can be converted by the scrambler 1010 into a scrambled bit sequence. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated by the modulator 1020 into a sequence of modulation symbols. The modulation scheme can 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 sequence of modulation symbols can be mapped by the layer mapper 1030 to one or more transmission layers. The modulation symbols of each transmission layer can be mapped (precoded) by the precoder 1040 to the corresponding antenna port(s). The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by the N*M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transmission layers. The precoder 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.

[0477] The resource mapper 1050 can map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources can include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to other devices through each antenna. For this purpose, the signal generator 1060 can include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an upconverter.

[0478] The signal processing procedure for the signals received in a wireless device can be configured in a manner opposite to that of Figure 22 the signal processing procedure (1010 to 1060). For example, a wireless device (e.g., Figure 21 100, 200) can receive radio signals from the outside through an antenna port / transceiver. The received radio signals can be converted into baseband signals by a signal restorer. To this end, the signal restorer can 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 restored into codewords through a resource demapping procedure, a post-coding procedure, a demodulation processor, and a descrambling procedure. The codewords can be restored into the original information blocks through decoding. Therefore, the signal processing circuit (not illustrated) for receiving signals can include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0479] Figure 23 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (refer to Figure 20 ). Figure 23 The embodiments of

[0480] can be combined with various embodiments of the present disclosure. Figure 23 Referring to Figure 21 , the wireless devices (100, 200) can correspond to the wireless devices (100, 200) of Figure 21 and can be configured by various elements, components, units / parts, and / or modules. For example, each of the wireless devices (100, 200) can include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140. The communication unit can include a communication circuit 112 and one or more transceivers 114. For example, the communication circuit 112 can include Figure 21One 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, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operations of the wireless device based on programs / codes / commands / information stored in the memory unit 130. The control unit 120 can send the information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0481] The additional components 140 can be configured in various ways according to the type of the wireless device. For example, the additional components 140 can 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 not limited to, the following forms: a robot ( Figure 20 100a), a vehicle ( Figure 20 100b-1 and 100b-2), an XR device ( Figure 20 100c), a handheld device ( Figure 20 100d), a household appliance ( Figure 20 100e), an IoT device ( Figure 20 100f), a digital broadcast terminal, a holographic device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device ( Figure 20 400), a BS ( Figure 20 200), a network node, etc. According to the use case / service, the wireless device can be used in a mobile or fixed location.

[0482] In Figure 23In this case, various elements, components, units / parts, and / or modules in the wireless devices (100, 200) can all be connected to each other through a wired interface, or at least some of them can be wirelessly connected through the 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 by a wired connection, and the control unit 120 and the first units (e.g., 130, 140) can be wirelessly connected through the communication unit 110. Each element, component, unit / part, and / or module within the wireless devices (100, 200) can also include one or more elements. For example, the control unit 120 can be constructed by a set of one or more processors. As an example, the control unit 120 can be constructed by a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory unit 130 can be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0483] Hereinafter, examples of implementing Figure 23 will be described in detail with reference to the accompanying drawings.

[0484] Figure 24 FIG. shows a handheld device according to an embodiment of the present disclosure. The handheld device can include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device can be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Figure 24 Embodiments of

[0485] Referring to Figure 24 , the handheld device 100 can 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 can be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c respectively correspond to Figure 23 blocks 110 to 130 / 140 of

[0486] The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from other wireless devices or a BS. The control unit 120 may perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The memory unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and includes a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). The I / O unit 140c may input or output video information / signals, audio information / signals, data, and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0487] For example, in the case of data communication, the I / O unit 140c may acquire information / signals input by a user (e.g., touch, text, voice, image, or video), and the acquired information / signals may be stored in the memory unit 130. The communication unit 110 may convert the information / signals stored in the memory into a radio signal and directly transmit the converted radio signal to other wireless devices or to a BS. The communication unit 110 may receive a radio signal from other wireless devices or a BS and then restore the received radio signal to the original information / signals. The restored information / signals may be stored in the memory unit 130 and may be output through the I / O unit 140 in various types (e.g., text, voice, image, video, or haptic).

[0488] Figure 25 A vehicle or an autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or the autonomous vehicle may be implemented by a mobile robot, an automobile, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 24 Embodiments of may be combined with various embodiments of the present disclosure.

[0489] Referring to Figure 25 , the vehicle or the autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a driving 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. Blocks 110 / 130 / 140a to 140d respectively correspond to Figure 23 blocks 110 / 130 / 140 of

[0490] The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous driving vehicle 100. The control unit 120 may include an electronic control unit (ECU). The driving unit 140a may cause the vehicle or autonomous driving vehicle 100 to travel on the road. The driving unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous driving vehicle 100 and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement technologies for maintaining the lane in which the vehicle travels, for automatically adjusting the speed (e.g., adaptive cruise control), for autonomously driving along a determined path, for driving by automatically setting a path when a destination is set, etc.

[0491] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the driving unit 140a such that the vehicle or autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may acquire the latest traffic information data from an external server non-periodically / periodically and acquire surrounding traffic information data from adjacent vehicles. During autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, the autonomous driving path, and / or the driving plan to an external server. The external server may use AI technology, etc. to predict traffic information data based on the information collected from the vehicle or autonomous driving vehicle and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0492] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or executed in a device, and the technical features in the device claims can be combined to be implemented or executed in a method. Additionally, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or executed in a device. Additionally, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or executed in a method.

Claims

1. A method for a first device to perform wireless communication, the method comprising the steps of: Receiving, from a second device, information related to resource selection for a plurality of resources for multi - consecutive - slot transmission (MCSt); Including the first resource in the plurality of resources by selecting the first resource based on the information; Sending, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) via a physical sidelink control channel (PSCCH); And Sending, based on the first resource, a media access control (MAC) protocol data unit (PDU) via the PSSCH, Wherein, the MCSt includes the transmission of the MAC PDU, and Wherein, the interval between the plurality of resources is less than or equal to 16 microseconds.

2. The method according to claim 1, wherein, The second device is a coordination device.

3. The method according to claim 1, wherein, The MAC PDU is sent to a third device.

4. The method according to claim 1, wherein The information is received via an inter - UE coordination (IUC) message.

5. The method according to claim 1, wherein, The information indicates the selection of the first resource.

6. The method according to claim 1, wherein, Based on the interval between the plurality of resources being 16 microseconds, for resources other than the earliest resource among the plurality of resources, channel sensing for a channel access procedure (CAP) is not performed.

7. The method according to claim 1, wherein The information includes information on channel occupancy time (COT).

8. The method according to claim 1, the method further comprising the steps of: Obtaining a first device identifier (ID) related to the first device; Wherein, the information includes information on ID offset and information on a set of device IDs including the first ID.

9. The method according to claim 8, wherein The information includes a set of candidate resources for the resource selection, the set of candidate resources including the first resource, and Wherein, based on the set of device IDs and the first ID, the first resource is selected from the set of candidate resources.

10. The method according to claim 9, wherein, The first resource is a resource corresponding to the order of the first device ID in the set of device IDs from the ID offset among at least one of the candidate resources within the set of candidate resources.

11. The method according to claim 1, wherein The information is received according to a broadcast or multicast scheme.

12. The method according to claim 1, wherein, Reducing the time gap between a third resource and the first resource among the plurality of resources based on the reservation of a second resource for a third device.

13. The method according to claim 12, wherein, Sending a virtual signal based on the second resource.

14. A first device for performing wireless communication, the first device comprising: At least one transceiver; At least one processor; And At least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions, the instructions, when executed by the at least one processor, cause the first device to perform operations, Wherein, the operations include: Receiving, from a second device, information related to resource selection for a plurality of resources for multi - consecutive - slot transmission (MCSt); Including the first resource in the plurality of resources by selecting the first resource based on the information; Sending, based on the first resource, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH) via a physical sidelink control channel (PSCCH); and Transmit a Media Access Control (MAC) Protocol Data Unit (PDU) via the Physical Sidelink Shared Channel (PSSCH) based on the first resource. wherein the MCSt includes the transmission of the MAC PDU, and wherein the interval between the multiple resources is less than or equal to 16 microseconds.

15. An apparatus adapted to control a first User Equipment (UE), the apparatus comprising: at least one processor; and at least one memory operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first UE to perform operations, wherein the operations include: receiving, from a second UE, information related to resource selection for multiple resources for Multi-Continuous Slot Transmission (MCSt); including the first resource in the multiple resources by selecting the first resource based on the information; transmitting sidelink control information (SCI) for scheduling the Physical Sidelink Shared Channel (PSSCH) via the Physical Sidelink Control Channel (PSCCH) based on the first resource; and transmitting a Media Access Control (MAC) Protocol Data Unit (PDU) via the PSSCH based on the first resource, wherein the MCSt includes the transmission of the MAC PDU, and wherein the interval between the multiple resources is less than or equal to 16 microseconds.

16. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a first apparatus to: receive, from a second apparatus, information related to resource selection for multiple resources for Multi-Continuous Slot Transmission (MCSt); include the first resource in the multiple resources by selecting the first resource based on the information; transmit sidelink control information (SCI) for scheduling the Physical Sidelink Shared Channel (PSSCH) via the Physical Sidelink Control Channel (PSCCH) based on the first resource; and transmit a Media Access Control (MAC) Protocol Data Unit (PDU) via the PSSCH based on the first resource, wherein the MCSt includes the transmission of the MAC PDU, and wherein the interval between the multiple resources is less than or equal to 16 microseconds.

17. A method for a second apparatus to perform wireless communication, the method comprising the steps of: sending, to a first apparatus, information related to resource selection for multiple resources for Multi-Continuous Slot Transmission (MCSt); wherein the first apparatus includes a first resource in the multiple resources based on the information, wherein, based on the first resource, sidelink control information (SCI) for scheduling the Physical Sidelink Shared Channel (PSSCH) is transmitted via the Physical Sidelink Control Channel (PSCCH), wherein, based on the first resource, a Media Access Control (MAC) Protocol Data Unit (PDU) is transmitted via the PSSCH, wherein the MCSt includes the transmission of the MAC PDU, and wherein the interval between the multiple resources is less than or equal to 16 microseconds.

18. The method according to claim 17, wherein, The information indicates the selection for the first resource.

19. A second apparatus for performing wireless communication, the second apparatus comprising: At least one transceiver; At least one processor; And At least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions which, when executed by the at least one processor, cause the second device to perform operations, Wherein the operations include: Sending information related to resource selection for a plurality of resources for multi - continuous - slot transmission (MCSt) to a first device; Wherein the first device includes a first resource in the plurality of resources based on the information, Wherein, based on the first resource, side - link control information (SCI) for scheduling a physical side - link shared channel (PSSCH) is sent via a physical side - link control channel (PSCCH), Wherein, based on the first resource, a media access control (MAC) protocol data unit (PDU) is sent via the PSSCH, Wherein the MCSt includes transmission of the MAC PDU, and Wherein the interval between the plurality of resources is less than or equal to 16 microseconds.

20. The second device according to claim 19, wherein, The information indicates the selection of the first resource.

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