Method and apparatus for performing COT sharing operation between terminals in shared spectrum

Abstract

A method for operating a first device (100) in a wireless communication system is presented. The method may comprise the steps of: determining to perform wireless communication in a shared spectrum, where a first SCI includes a field related to whether to perform a COT sharing operation on the basis of determining to perform wireless communication in the shared spectrum; and determining whether to perform a COT sharing operation, in which, on the basis of determining to perform the COT sharing operation, a value of a field related to whether to perform the LOT sharing operation is set to 1.

Description

Technical Field

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

[0002] Sidelink (SL) communication is a communication scheme in which a direct link is established between user equipments (UEs) and the UEs directly exchange voice and data with each other without the intervention of an evolved Node B (eNB). SL communication is being considered as a solution to eNB overhead caused by rapid growth of data traffic. Vehicle-to-Everything (V2X) refers to a communication technology through which a vehicle exchanges information with other vehicles, pedestrians, entities in which infrastructure (or an infrastructure) is established, and the like. V2X can be extended to four types such as Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), Vehicle-to-Network (V2N), and Vehicle-to-Pedestrian (V2P). V2X communication can be provided via a PC5 interface and / or a Uu interface.

[0003] Meanwhile, as a wider range of communication devices require greater communication capacity, the demand for mobile broadband communication that is more enhanced than existing radio access technologies (RAT) is on the rise. Accordingly, services and user equipments (UEs) that are sensitive to reliability and latency have been discussed. Also, 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] According to an embodiment of the present disclosure, a method of performing wireless communication by a first device may be proposed. For example, the method may include: determining to perform wireless communication in a shared spectrum, wherein, based on the determination to perform the wireless communication in the shared spectrum, a first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on the determination to perform the COT sharing operation, a value of the field related to whether to perform the COT sharing operation may be set to 1; and transmitting the first SCI to a second device through a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0005] According to an embodiment of the present disclosure, a first device for performing wireless communication may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations. For example, the operations may include: determining to perform wireless communication in a shared spectrum, wherein, based on the determination to perform the wireless communication in the shared spectrum, first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on the determination to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1; and transmitting the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0006] According to an embodiment of the present disclosure, a device adapted to control a first user equipment (UE) may be provided. For example, the device may include: at least one processor; and at least one memory operably 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, and the operations may include: determining to perform wireless communication in a shared spectrum, wherein, based on the determination to perform the wireless communication in the shared spectrum, first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on the determination to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1; and transmitting the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0007] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions, when executed, may cause a first device to: determine to perform wireless communication in a shared spectrum, wherein, based on the determination to perform the wireless communication in the shared spectrum, first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determine whether to perform the COT sharing operation, wherein, based on the determination to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1; and transmit the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0008] According to an embodiment of the present disclosure, a method for a second device to perform wireless communication may be proposed. For example, the method may include: receiving the first side link control information (SCI) from a first device via a physical side link control channel (PSCCH) based on a first resource within a first resource block (RB) set, where the wireless communication may be performed in a shared spectrum, and where, based on determining that the wireless communication is to be performed in the shared spectrum, the first SCI may include a field related to whether to perform a channel occupancy time (COT) sharing operation.

[0009] According to an embodiment of the present disclosure, a second device for performing wireless communication may be proposed. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory operably 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: receiving the first side link control information (SCI) from a first device via a physical side link control channel (PSCCH) based on a first resource within a first resource block (RB) set, where the wireless communication may be performed in a shared spectrum, and where, based on determining that the wireless communication is to be performed in the shared spectrum, the first SCI may include a field related to whether to perform a channel occupancy time (COT) sharing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Shows a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure.

[0011] Figure 2 Shows an electromagnetic spectrum according to an embodiment of the present disclosure.

[0012] Figure 3 Shows the structure of an NR system based on an embodiment of the present disclosure.

[0013] Figure 4 Shows a radio protocol architecture based on an embodiment of the present disclosure.

[0014] Figure 5 Shows the structure of a radio frame of NR based on an embodiment of the present disclosure.

[0015] Figure 6 Shows the structure of a time slot of an NR frame based on an embodiment of the present disclosure.

[0016] Figure 7 Shows an example of a BWP based on an embodiment of the present disclosure.

[0017] Figure 8Illustrates a process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure.

[0018] Figure 9 Illustrates three broadcast types according to an embodiment of the present disclosure.

[0019] Figure 10 Illustrates an example of a wireless communication system supporting an unlicensed band according to an embodiment of the present disclosure.

[0020] Figure 11 Illustrates a method of occupying resources in an unlicensed band according to an embodiment of the present disclosure.

[0021] Figure 12 Illustrates a case including multiple LBT-SBs in an unlicensed band according to an embodiment of the present disclosure.

[0022] Figure 13 Illustrates a CAP operation performed by a base station to transmit a downlink signal through an unlicensed band according to an embodiment of the present disclosure.

[0023] Figure 14 Illustrates a type 1 CAP operation performed by a UE for transmitting an uplink signal according to an embodiment of the present disclosure.

[0024] Figure 15 Illustrates a method in which a UE having reserved transmission resources notifies another UE of the transmission resources according to an embodiment of the present disclosure.

[0025] Figure 16 Illustrates the structure of a first SCI according to an embodiment of the present disclosure, the fields of which differ according to the spectrum in which SL communication is performed.

[0026] Figure 17 Illustrates the structure of a second SCI according to an embodiment of the present disclosure, the fields of which differ according to the value set in the COT sharing flag field of the first SCI.

[0027] Figure 18 Illustrates a process for a first device to perform wireless communication according to an embodiment of the present disclosure.

[0028] Figure 19 Illustrates a process for a first device to perform wireless communication according to an embodiment of the present disclosure.

[0029] Figure 20 Illustrates communication system 1 according to an embodiment of the present disclosure.

[0030] Figure 21 Illustrates a wireless device according to an embodiment of the present disclosure.

[0031] Figure 22 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0032] Figure 23 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0033] Figure 24 A handheld device according to an embodiment of the present disclosure is shown.

[0034] Figure 25 A vehicle or an autonomous vehicle according to an embodiment of the present disclosure is shown. Detailed Description

[0035] 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".

[0036] In the present disclosure, a slash ( / ) or a comma 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".

[0037] 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".

[0038] 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".

[0039] Furthermore, 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, "control information" in the present disclosure is not limited to "PDCCH", and "PDCCH" 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".

[0040] In the following description, "when, if, or in case" can be replaced with "based on".

[0041] The technical features described separately in one of the accompanying drawings in the present disclosure can be implemented separately or can be implemented simultaneously.

[0042] In the present disclosure, a higher layer parameter can be a parameter configured, pre-configured, or pre-defined for a UE. For example, a base station or a network can send the higher layer parameter to the UE. For example, the higher layer parameter can be sent via radio resource control (RRC) signaling or media access control (MAC) signaling.

[0043] The technologies described below can be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented using radio technologies such as universal terrestrial radio access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). OFDMA can 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 the 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.

[0044] 5G NR is a subsequent technology to LTE-A corresponding to a new and innovative mobile communication system with characteristics such as high performance, low latency, high availability, etc. 5G NR can 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.

[0045] The goals of a 6G (wireless communication) system are (i) very high data rates for each device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) lower energy consumption for battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) interconnected intelligence with machine learning capabilities. The vision of a 6G system can be in four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can meet the requirements shown in Table 1 below. In other words, Table 1 is an example of the requirements of a 6G system.

[0046] [Table 1]

[0047]

[0048] A 6G system may possess 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.

[0049] 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 of can be combined with various embodiments of the present disclosure.

[0050] A 6G system is expected to have a synchronous radio connection capability 50 times higher than that of a 5G radio system. URLLC, as a key feature of 5G, will become a more dominant technology in 6G communication by providing an end-to-end latency of less than 1 millisecond. In a 6G system, the volumetric spectral efficiency will be much better than the area spectral efficiency commonly used currently. A 6G system will be able to provide a very long battery life and advanced battery technologies for energy harvesting, so mobile devices do not need to be charged separately in a 6G system. In 6G, the new network characteristics may be as follows.

[0051] - Satellite-fused networking: To provide global mobile population, 6G is expected to be fused with satellites. Integrating terrestrial, satellite, and airborne networks into a single wireless communication system is very important for 6G.

[0052] - Interconnected intelligence: Different from previous generations of wireless communication systems, 6G is revolutionary, and the wireless evolution will be updated from "Internet of Things" to "Internet of Intelligence". AI can be applied to each step of the communication process (or each step of signal processing, as described later).

[0053] - Seamless integration of wireless information and energy transfer: The 6G wireless network will provide power to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0054] - Ubiquitous ultra-3D connectivity: Ultra-3D connectivity will result from ubiquitous 6G to access network and core network functions on drones and very low Earth orbit satellites.

[0055] Given the above new network characteristics of 6G, some common requirements may be as follows

[0056] - Small cell networks: The concept of small cell networks is introduced into cellular systems to improve the received signal quality by enhancing processing throughput, energy efficiency, and spectral efficiency. Therefore, small cell networks are a fundamental feature for communication systems on 5G and beyond 5G (5GB). Thus, 6G communication systems will also adopt the characteristics of small cell networks.

[0057] - 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 quality of service and reduce costs.

[0058] - High-capacity backhaul: Backhaul connections are characterized by high-capacity backhaul networks supporting a large volume of traffic. High-speed optical fibers and free space optics (FSO) systems may be a possible solution to this problem.

[0059] - Radar technology integrated with mobile technology: Achieving high-precision positioning (or location-based services) through communication is one of the characteristics of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0060] - Softwareization and virtualization: Softwareization and virtualization are two important features that underlie the design process in 5GB networks to ensure flexibility, reconfigurability, and programmability. In addition, billions of devices may be shared on a shared physical infrastructure.

[0061] The core implementation technologies for 6G systems are described below.

[0062] -Artificial Intelligence: The most important new technology that will be introduced in 6G systems is artificial intelligence (AI). 4G systems do not involve artificial intelligence. 5G systems will support partial or very limited artificial intelligence. However, 6G systems will fully support artificial intelligence for automation. Advances in machine learning will create a more intelligent network for real-time communications in 6G. The introduction of artificial intelligence in the telecommunications sector can simplify and improve real-time data transmission. AI can use a large number of analyses to determine the way to perform complex target operations, which means that AI can improve efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be completed instantly by using artificial intelligence. AI may also play an important role in M2M, machine-to-human, and human-to-machine communications. In addition, AI may become a fast communication method in brain-computer interfaces (BCI). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, smart cognitive radios, self-sustaining wireless networks, and machine learning.

[0063] -THz communication (THz communication): Data rates can be increased by increasing bandwidth. This can be achieved by using wide-bandwidth THz communication and applying advanced massive MIMO technology. Terahertz waves, also known as submillimeter radiation, refer to the frequency band between 0.1 and 10 THz, and the corresponding wavelengths generally range from 0.03 mm to 3 mm. The 100GHz-300GHz frequency band range (THz band) is considered to be the main part of the THz band for cellular communications. Adding the THz band to the millimeter wave band can increase the capacity of 6G cellular communications. 300GHz-3THz in the defined THz band belongs to the far infrared (IR) band. The 300GHz-3THz band is part of the optical band, but it is located on the boundary of the optical band and is located after the RF band. Therefore, the 300GHz-3THz band shows similarities with RF. Figure 2 The electromagnetic spectrum is shown according to one embodiment of the present disclosure. Figure 2 The embodiments of can be combined with various embodiments of the present disclosure. Key characteristics of terahertz communications include (i) widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (for which highly directional antennas are essential). The narrow beamwidth produced by highly directional antennas can reduce interference. The small wavelength of terahertz signals allows a greater number of antenna elements to be integrated into devices and base stations operating in this frequency band. This enables the use of advanced adaptive array techniques that can overcome range limitations.

[0064] - Massive MIMO

[0065] - HBF, Holographic Beamforming

[0066] - Optical Wireless Technology

[0067] - FSO Backhaul Network

[0068] - Non-Terrestrial Network, NTN

[0069] - Quantum Communication

[0070] - Cell-Free Communication

[0071] - Integration of Wireless Information and Power Transmission

[0072] - Integration of Wireless Communication and Sensing

[0073] - Integrated Access and Backhaul Network

[0074] - Big Data Analytics

[0075] - Reconfigurable Intelligent Surface

[0076] - Metaverse

[0077] - Blockchain

[0078] - UAV, Unmanned Aerial Vehicle: Unmanned Aerial Vehicles (UAVs) or drones will become an important part of 6G wireless communication. In most cases, drone technology is used to provide high-speed wireless data connections. BS entities are installed on drones to provide cellular connections. Drones have specific characteristics that fixed base station infrastructures do not have, such as easy deployment, strong line-of-sight links, and the freedom of controlled movement. In emergency situations such as natural disasters, it is economically unfeasible to deploy ground communication infrastructures and sometimes services cannot be provided in unstable environments. Drones can easily handle these situations. Drones will become a new paradigm in wireless communication. This technology meets the three basic requirements of wireless networks: eMBB, URLLC, and mMTC. Drones can also support many other uses, such as enhancing network connectivity, fire detection, disaster emergency services, security and monitoring, pollution monitoring, parking monitoring, accident monitoring, etc. Therefore, drone technology is recognized as one of the most important technologies for 6G communication.

[0079] - Autonomous driving, self-driving: For perfect autonomous driving, vehicles must communicate with each other to inform each other of dangerous situations, or vehicles must communicate with infrastructure such as parking lots and traffic lights to check parking location information and signal change times, etc. Vehicle-to-Everything (V2X), a key element in building the autonomous driving infrastructure, is a technology that allows vehicles to communicate and share information with various elements on the road in order 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 technology are crucial. In addition, in the future, autonomous driving will not only issue warnings or guidance information to the driver, but will actively intervene in the vehicle operation and directly control the vehicle in dangerous situations. Therefore, the amount of information to be sent and received will be very large, and 6G is expected to maximize autonomous driving with a faster transmission speed and lower latency than 5G.

[0080] For clarity, the description focuses on 5G NR, but the technical idea of an embodiment of the present disclosure is not limited thereto. Various embodiments of the present disclosure can also be applied to 6G communication systems.

[0081] 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.

[0082] Reference Figure 3 , the next-generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol termination to the UE 10. For example, the BS 20 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 a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a 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 a base transceiver system (BTS), an access point (AP), etc.

[0083] Figure 3 Embodiments of illustrate only the case including only gNBs. The BSs 20 may be interconnected via the Xn interface. The BSs 20 may be interconnected via the fifth-generation (5G) core network (5GC) and the NG interface. More specifically, the BS 20 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.

[0084] 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 transfer 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.

[0085] Figure 4 Shows a radio protocol architecture according to an embodiment of the present disclosure. Figure 4 Embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 In (a) shows the radio protocol stack of the user plane for Uu communication, and Figure 4 In (b) shows the radio protocol stack of the control plane for Uu communication. Figure 4 In (c) shows the radio protocol stack of the user plane for SL communication, and Figure 4 In (d) shows the radio protocol stack of the control plane for SL communication.

[0086] Refer 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 media access control (MAC) layer, which is the upper layer of the physical layer, through transport channels. Data is transferred between the MAC layer and the physical layer through transport channels. Transport channels are classified according to how data is transmitted through the radio interface and what characteristics of data are transmitted.

[0087] 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 channels can be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and the physical channels use time and frequency as radio resources.

[0088] The MAC layer provides services to the radio link control (RLC) layer via logical channels, which is the higher 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 transfer service through logical channels.

[0089] 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).

[0090] 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 delivery between the UE and the network.

[0091] The functions of the packet data convergence protocol (PDCP) in the user plane include delivery of user data, header compression, and encryption. The functions of the packet data convergence protocol (PDCP) in the control plane include delivery of control plane data and encryption / integrity protection.

[0092] 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 QoS flow ID (QFI) marking in both DL packets and UL packets.

[0093] 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. A DRB is used as a path for sending user data in the user plane.

[0094] 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_INACTIVE) state is additionally defined, and a UE in the RRC_INACTIVE state can maintain its connection with the core network while releasing its connection with the BS.

[0095] Data is sent from the network to the UE via a downlink transport channel. Examples of downlink transport channels include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent on the downlink SCH or may be sent on an additional downlink multicast channel (MCH). In addition, data is sent from the UE to the network via an uplink transport channel. Examples of uplink transport channels include a random access channel (RACH) for sending an initial control message and an uplink shared channel (SCH) for sending user traffic or control messages.

[0096] Examples of logical channels that belong to the higher layer of the transport channel and are mapped to the transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0097] Figure 5 The structure of a radio frame of NR according to an embodiment of the present disclosure is shown. Figure 5 Embodiments of may be combined with various embodiments of the present disclosure.

[0098] Reference Figure 5 , in NR, a radio frame may be used to perform uplink and downlink transmissions. The length of the radio frame is 10 ms and may be defined as being composed of two half-frames (HF). A half-frame may include five 1 ms sub-frames (SF). A sub-frame (SF) may be extended into one or more time slots, and the number of time slots within a sub-frame may be determined according to the subcarrier spacing (SCS). Each time slot may include 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP).

[0099] In the case of using a normal CP, each time slot may include 14 symbols. In the case of using an extended CP, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single-carrier FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0100] Table 2 below shows the number of symbols per time slot (N slot symb ), the number of time slots per frame (N frame,u slot ), and the number of time slots per sub-frame (N subframe,u slot ) depending on the SCS configuration (u) when using a normal CP or an extended CP.

[0101] [Table 2]

[0102]

[0103] 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 time unit (TU) for simplicity) composed of the same number of symbols can be configured differently in the integrated cells.

[0104] 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.

[0105] NR 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 "range below 6 GHz", and FR2 can mean "range above 6 GHz", and can also be referred to as millimeter wave (mmW).

[0106] [Table 3]

[0107]

[0108] As mentioned 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 bands at 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the bands at 6 GHz (or 5850, 5900, 5925 MHz, etc.) included in FR1 can include unlicensed bands. The unlicensed bands can be used for various purposes, for example, the unlicensed bands are used for vehicle-specific communication (e.g., autonomous driving).

[0109] [Table 4]

[0110]

[0111] Figure 6Shows the structure of a time slot of an NR frame according to an embodiment of the present disclosure. Figure 6 Embodiments of can be combined with various embodiments of the present disclosure.

[0112] Refer 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. For example, 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.).

[0113] 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.

[0114] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0115] The 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.

[0116] 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 a DL BWP 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 continuous RB set 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. To save energy, 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.

[0117] In addition, a BWP can be defined for 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 a UE in the RRC_CONNECTED mode, at least one SL BWP can be activated in the carrier.

[0118] 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.

[0119] Reference 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.

[0120] A BWP can be configured by point A, an offset relative to point A (N start BWP ), and a bandwidth (N size BWP ). For example, point A can be an external reference point of the PRBs of a carrier, and subcarrier 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 subcarrier within a given parameter set and point A. For example, the bandwidth can be the number of PRBs within a given parameter set.

[0121] In the following, V2X or SL communication will be described.

[0122] A 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 the S-SSS for detailed synchronization acquisition and for the detection of synchronization signal IDs.

[0123] 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 a resource pool, the type of application related to SLSS, subframe 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).

[0124] The S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., the SL synchronization signal (SS) / PSBCH block, hereinafter, the sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can be within the (pre-)configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SB). For example, the PSBCH can span 11 RBs. Additionally, the frequency position of the S-SSB can be (pre-)configured. Thus, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0125] Figure 8 The process of the UE performing V2X or SL communication based on the transmission mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of can be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode can be referred to as a mode or a resource allocation mode. Hereinafter, for ease of description, in LTE, the transmission mode can be referred to as the LTE transmission mode. In NR, the transmission mode can be referred to as the NR resource allocation mode.

[0126] For example, Figure 8 (a) of shows the UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) in shows the UE operation related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to conventional SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0127] For example, Figure 8 (b) of shows the UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) of shows the UE operation related to NR resource allocation mode 2.

[0128] Referring to Figure 8 (a) of, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station can schedule the SL resources to be used by the UE for SL transmission. For example, in step S800, the base station can send information related to the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources can include PUCCH resources and / or PUSCH resources. For example, the UL resources can be the resources for reporting SL HARQ feedback to the base station.

[0129] 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.

[0130] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or phase 1 SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH related to the PSCCH (e.g., phase 2 SCI, MAC PDU, data, etc.) 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 the 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 preconfigured 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.

[0131] Reference 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 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 a selection window by performing a sensing process and a resource (re)selection process. For example, sensing can be performed on a sub-channel basis. For example, in step 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-phase SCI) to the second UE using the resources. In step S820, the first UE may send a PSSCH (e.g., second-phase 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.

[0132] Reference Figure 8 In (a) or (b) thereof, for example, the first UE may send SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., two-phase 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., two-phase 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 1st SCI, first SCI, first-phase SCI, or first-phase SCI format, and the SCI sent via the PSSCH may be referred to as the 2nd SCI, second SCI, second-phase SCI, or second-phase SCI format. For example, the first-phase SCI format may include SCI format 1-A, and the second-phase SCI format may include SCI format 2-A and / or SCI format 2-B.

[0133] Hereinafter, an example of SCI format 1-A will be described.

[0134] SCI format 1-A is used for scheduling the second-phase SCI on the PSSCH and PSSCH.

[0135] The following information is transmitted via SCI format 1-A:

[0136] - Priority - 3 bits

[0137] - Frequency resource allocation - When the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2, it is ceiling(log 2 (N SL subChannel (N SL subChannel + 1) / 2)); Otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3, it is ceiling log 2 (N SL subChannel (N SL subChannel + 1)(2N SL subChannel + 1) / 6)

[0138] - Time resource allocation - 5 bits when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2; otherwise 9 bits when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3

[0139] - Resource reservation period - If the higher layer parameter sl-MultiReserveResource is configured, it is ceiling(log 2 N rsv_period ), where N rsv_period is the number of entries in the higher layer parameter sl-ResourceReservePeriodList; otherwise 0 bits

[0140] - DMRS pattern - ceiling(log 2 N pattern ), where N pattern is the number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList

[0141] - Second phase SCI format - 2 bits, as defined in Table 5

[0142] - Beta_offset indicator - 2 bits provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0143] - Number of DMRS ports - 1 bit, as defined in Table 6

[0144] - Modulation and coding scheme - 5 bits

[0145] - 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

[0146] - PSFCH overhead indicator — 1 bit if the higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise 0 bits

[0147] - Reserved — The number of bits determined by the higher layer parameter sl-NumReservedBits, which is set to zero.

[0148] [Table 5]

[0149]

[0150] [Table 6]

[0151]

[0152] In the following, an example of SCI format 2-A will be described.

[0153] SCI format 2-A is used for the decoding of PSSCH with HARQ operation 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.

[0154] The following information is transmitted through SCI format 2-A:

[0155] - HARQ process number — 4 bits

[0156] - New data indicator — 1 bit

[0157] - Redundancy version — 2 bits

[0158] - Source ID — 8 bits

[0159] - Destination ID — 16 bits

[0160] - HARQ feedback enable / disable indicator — 1 bit

[0161] - Transformation type indicator — 2 bits, as defined in Table 7

[0162] - CSI request — 1 bit

[0163] [Table 7]

[0164]

[0165] In the following, an example of SCI format 2-B will be described.

[0166] When the HARQ-ACK information only includes NACK, or when there is no HARQ-ACK information feedback, SCI format 2-B is used for the decoding of PSSCH with HARQ operation.

[0167] The following information is transmitted through SCI format 2-B:

[0168] - HARQ process number - 4 bits

[0169] - New data indicator - 1 bit

[0170] - Redundancy version - 2 bits

[0171] - Source ID - 8 bits

[0172] - Destination ID - 16 bits

[0173] - HARQ feedback enable / disable indicator - 1 bit

[0174] - Zone ID - 12 bits

[0175] - Communication range requirement - 4 bits determined by the higher layer parameter sl-ZoneConfigMCR-Index

[0176] Reference 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 may use the PSFCH resource to send HARQ feedback to the first UE.

[0177] Reference Figure 8 In (a) of, in step S840, the first UE may send SL HARQ feedback to the base station through the PUCCH and / or PUSCH.

[0178] Figure 9 Shows three broadcast types according to an embodiment of the present disclosure. Figure 9 The embodiments of may be combined with various embodiments of the present disclosure.

[0179] Specifically, Figure 9 In (a) of, it shows broadcast-type SL communication, Figure 9 In (b) of, it shows unicast-type SL communication, and Figure 9Figure (c) shows multicast-based SL communication. In the case of unicast-based SL communication, a UE can perform one-to-one communication with another UE. In the case of multicast-based SL transmission, a UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL multicast communication can be replaced by SL multiple-cast communication, SL one-to-many communication, etc.

[0180] Meanwhile, in traditional unlicensed spectrum (NR-U), communication methods between a UE and a base station are supported in the unlicensed band. In addition, a mechanism for supporting communication in the unlicensed band between sidelink UEs is planned to be supported in Rel-18.

[0181] In the present disclosure, a channel can refer to a set of frequency-domain resources in which listen-before-talk (LBT) is performed. In NR-U, a channel can refer to an LBT bandwidth of 20 MHz and can have the same meaning as a set of RBs. For example, a set of RBs can be defined in Section 7 of 3GPP TS 38.214 V17.0.0.

[0182] In the present disclosure, channel occupancy (CO) can refer to the time-domain / frequency-domain resources acquired by a base station or a UE after successful LBT.

[0183] In the present disclosure, channel occupancy time (COT) can refer to the time-domain resources acquired by a base station or a UE after successful LBT. It can be shared between the base station (or UE) and the UE (or base station) that acquires the CO, which can be referred to as COT sharing. Depending on the initiating device, this can be referred to as gNB-initiated COT or UE-initiated COT.

[0184] Hereinafter, a wireless communication system that supports an unlicensed band / shared spectrum will be described.

[0185] Figure 10 An example of a wireless communication system that supports an unlicensed band according to an embodiment of the present disclosure is shown. For example, Figure 10 it may include an unlicensed spectrum (NR-U) wireless communication system. Figure 10 Embodiments can be combined with various embodiments of the present disclosure.

[0186] In the following description, a cell operating in a licensed band (hereinafter, the L band) can be defined as an L cell, and the carrier of the L cell can be defined as a (DL / UL / SL) LCC. In addition, a cell operating in an unlicensed band (hereinafter, the U band) can be defined as a U cell, and the carrier of the U cell can be defined as a (DL / UL / SL) UCC. The carrier / carrier frequency of a cell can refer to the operating frequency of the cell (e.g., the center frequency). A cell / carrier (e.g., a CC) is generally referred to as a cell.

[0187] When the base station and the UE transmit and receive signals on the LCC and UCC of carrier aggregation as shown in (a) of Figure 10 , the LCC and UCC can be configured as the primary CC (PCC) and the secondary CC (SCC), respectively. The base station and the UE can transmit and receive signals on one UCC or on multiple carrier-aggregated UCCs, as shown in (b) of Figure 10 . In other words, the base station and the UE can transmit and receive signals only on the UCC without using any LCC. For independent operation, PRACH transmission, PUCCH transmission, PUSCH transmission, SRS transmission, etc. can be supported on the UCell.

[0188] In the Figure 10 embodiment, the base station can be replaced by the UE. In this case, for example, PSCCH transmission, PSSCH transmission, PSFCH transmission, S-SSB transmission, etc. can be supported on the UCell.

[0189] Unless otherwise specified, the following definitions apply to the following terms used in this disclosure.

[0190] - Channel: A carrier or a part of a carrier consisting of a continuous set of RBs, where the channel access process is performed in the shared spectrum.

[0191] - Channel Access Process (CAP): A process of evaluating the 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 with a duration of 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 , 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 Process (CAP) can include LBT, and channel sensing can be performed to monitor the power of the channel during a specific time interval (channel sensing interval) for CAP.

[0192] - Channel Occupancy: The transmission of the base station / UE on the channel after the channel access process.

[0193] - Channel Occupancy Time (COT): The total time that a base station / UE and any base station / UE sharing the channel can perform transmissions on the channel after the base station / UE executes a channel access procedure. When determining the COT, if the transmission gap is less than or equal to 25 us, the gap duration can be included in the COT. The COT can be shared for transmissions between the base station and the corresponding UE.

[0194] - DL Transmission Burst: A set of transmissions from the base station with no gaps greater than 16 us. Transmissions from the base station separated by gaps greater than 16 us are considered separate DL transmission bursts. The base station can perform transmissions after the gap without sensing the channel availability within the DL transmission burst.

[0195] - UL or SL Transmission Burst: A set of transmissions from the UE with no gaps greater than 16 us. Transmissions from the UE separated by gaps greater than 16 us are considered separate UL or SL transmission bursts. The UE can perform transmissions after the gap without sensing the channel availability within the UL or SL transmission burst.

[0196] - Discovery Burst: A DL transmission burst that includes a set of signals and / or channels 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 the 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 PDCCH for scheduling the PDSCH carrying SIB1, the PDSCH carrying SIB1, and / or the CORESET for non-zero power CSI-RS.

[0197] Figure 11 A method of occupying resources in an unlicensed band based on an embodiment of the present disclosure is shown. Figure 12 Embodiments of can be combined with various embodiments of the present disclosure.

[0198] Refer to Figure 11 , a communication node (e.g., a base station, a UE) within an unlicensed band should determine whether other communication nodes are using the channel before signal transmission. To this end, a communication node within the unlicensed band can perform a channel access procedure (CAP) to access the channel on which transmissions are performed. The channel access procedure can be performed based on sensing. For example, a communication node can perform carrier sensing (CS) before sending a signal to check whether other communication nodes are performing signal transmissions. When other communication nodes are not performing signal transmissions, the clear channel assessment (CCA) is confirmed. If the CCA threshold (e.g., X ThreshIf it is predefined or configured by a higher layer (e.g., RRC), then if the detected channel energy is higher than the CCA threshold, the communication node may determine that the channel is busy. Otherwise, the communication node may determine that the channel is idle. If it is determined that the channel is idle, the communication node may initiate signal transmission in the unlicensed band. 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) for CAP.

[0199] Table 8 shows an example of the channel access procedure (CAP) supported in NR-U.

[0200] [Table 8]

[0201]

[0202] Referring to Table 8, the LBT type or CAP for DL / UL / SL transmission can be defined. However, Table 8 is only an example, and new types or CAPs can be defined in a similar manner. For example, Type 1 (also known as Cat-4 LBT) can 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 can be performed when sharing the COT within the COT obtained by the base station (gNB) or UE.

[0203] Hereinafter, the LBT sub-band (SB) (or set of RBs) will be described.

[0204] In a wireless communication system supporting the unlicensed band, a cell (or carrier (e.g., CC)) or BWP configured for a UE may have a wideband with a larger bandwidth (BW) than in conventional LTE. However, the BW that requires CCA based on independent LBT operation may be restricted by regulations. The sub-band (SB) in which LBT is performed separately is defined as the LBT-SB. Then, multiple LBT-SBs can be included in one wideband cell / BWP. A set of RBs included in the LBT-SB can 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 can be included in one cell / BWP.

[0205] Figure 12 Shows a case where multiple LBT-SBs are included in the unlicensed band based on an embodiment of the present disclosure. Figure 12 The embodiments of can be combined with various embodiments of the present disclosure.

[0206] Referring to Figure 12, multiple LBT-SBs can be included in the BWP of a cell (or carrier). The LBT-SB can have a frequency band of, for example, 20 MHz. The LBT-SB can include multiple consecutive (P) RBs in the frequency domain and can thus be referred to as a set of (P) RBs. Although not shown, guard bands (GBs) can be inserted between LBT-SBs. Thus, the BWP can 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, the LBT-SB / RB indices can be configured / defined in ascending order from the lowest frequency to the highest frequency.

[0207] Hereinafter, the channel access priority class (CAPC) will be described.

[0208] The CAPC of the MAC CE and radio bearers can be fixed or configured to operate in FR1:

[0209] - Fixed to the lowest priority for filling the buffer status report (BSR) and recommended bitrate MAC CE;

[0210] - Fixed to the highest priority for SRB0, SRB1, SRB3, and other MAC CEs;

[0211] - Configured by the base station for SRB2 and DRBs.

[0212] When selecting the CAPC of a DRB, the base station considers the fairness between other traffic types and transmissions while taking into account the 5QI of all QoS flows multiplexed to the corresponding DRB. Table 9 shows which CAPC should be used for standardizing the 5QI, that is, the CAPC for a given QoS flow. For standardizing the 5QI, 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.

[0213] [Table 9]

[0214]

[0215] Hereinafter, a method for transmitting downlink signals through an unlicensed band will be described. For example, the method for transmitting downlink signals through an unlicensed band can be applied to the method for transmitting sidelink signals through an unlicensed band.

[0216] The base station can perform one of the following channel access procedures (e.g., CAP) for downlink signal transmission in the unlicensed band.

[0217] (1) Type 1 downlink (DL) CAP method

[0218] 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:

[0219] - Transmissions initiated by the base station, including (i) unicast PDSCH with user plane data or (ii) unicast PDSCH with user plane data and unicast PDCCH scheduling user plane data, or

[0220] - Transmissions initiated by the base station, including (i) discovery bursts only or (ii) discovery bursts multiplexed with non-unicast information.

[0221] Figure 13 Illustrated is CAP operation performed by a base station based on an embodiment of the present disclosure to transmit downlink signals over an unlicensed band. Figure 13 Embodiments of can be combined with various embodiments of the present disclosure.

[0222] Referring to Figure 13 , the base station can sense whether the channel is idle for a sensed time slot duration of a delay duration T d . Then, if the counter N is zero, the base station can perform a transmission (S134). In this case, the base station can adjust the counter N by sensing the channel within an additional sensed time slot duration according to the following steps:

[0223] Step 1) (S120) The base station 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.

[0224] 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).

[0225] Step 3) (S150) The base station senses the channel within an additional sensed time slot duration. If the additional sensed time slot duration is idle (Yes), proceed to Step 4. Otherwise (No), proceed to Step 5.

[0226] Step 4) (S130) If N = 0 (Y), the base station terminates the CAP (S132). Otherwise (No), proceed to Step 2.

[0227] Step 5) (S160) The base station senses the channel until a busy sensed time slot is detected within an additional delay duration T d or the additional delay duration T dAll time slots are idle.

[0228] Step 6) (S170) If the channel is sensed to be idle (yes) for all time slot durations of the additional delay duration T d then proceed to Step 4. Otherwise (no), proceed to Step 5.

[0229] Table 10 shows that the m p , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW size vary according to the channel access priority class.

[0230] [Table 10]

[0231]

[0232] Referring to Table 10, the contention window size (CWS), 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 ).

[0233] Configure the delay duration T d in the following order: duration T f (16 us) + m p consecutive sensing time slot durations T sl (9 us). T f includes the sensing time slot duration T sl at the start of the 16 us duration.

[0234] Satisfy 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) of the previous DL burst (e.g., PDSCH) before Step 1. For example, CW p can be initialized to CW min,p based on the HARQ-ACK feedback for the previous DL burst. Alternatively, CW p can be increased to the next higher allowed value or remain the same.

[0235] (2) Type 2 Downlink (DL) CAP Method

[0236] In Type 2 DL CAP, the length of the duration spanned by the sensed time slots sensed as idle before transmission can be determined. Type 2 DL CAP is divided into Type 2A / 2B / 2C DL CAP.

[0237] Type 2A DL CAP can be applied to the following transmissions. In Type 2A DL CAP, the base station can perform transmission immediately after sensing that the channel has been 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 time slot duration immediately following the duration T f where the duration T f includes a sensing time slot at its start.

[0238] - Transmissions initiated by the base station, including (i) discovery bursts only or (ii) discovery bursts multiplexed with non - unicast information, or

[0239] - Transmissions by the base station after a 25 - us gap from a transmission by the UE within the shared channel occupancy.

[0240] Type 2B DL CAP is applicable to transmissions performed by the base station after a 16 - us gap from a transmission by the UE within the shared channel occupancy time. In Type 2B DL CAP, the base station can perform transmission immediately after sensing that the channel is idle for T f = 16 us. T f includes a sensing time slot within 9 us relative to the end of the duration. Type 2C DL CAP is applicable to transmissions performed by the base station after at most 16 us from a transmission by the UE within the shared channel occupancy time. In Type 2C DL CAP, the base station does not perform channel sensing before performing transmission.

[0241] 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.

[0242] The UE can perform Type 1 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 scheduling PUSCH transmission (e.g., DCI format 0_0 and 0_1) can include CAP type indication information for the UE.

[0243] (1) Type 1 Uplink (UL) CAP Method

[0244] In Type 1 UL CAP, the length of the duration spanned by the sensed time slots sensed as idle before transmission is random. Type 1 UL CAP can be applied to the following transmissions.

[0245] - PUSCH / SRS transmissions scheduled and / or configured by the base station

[0246] - PUCCH transmissions scheduled and / or configured by the base station

[0247] - Transmissions related to the random access procedure (RAP)

[0248] Figure 14 Shown is a Type 1 CAP operation for transmitting uplink signals performed by a UE based on an embodiment of the present disclosure. Figure 14 Embodiments of can be combined with various embodiments of the present disclosure.

[0249] Refer to Figure 14 , the UE 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 UE can perform the transmission (S234). In this case, the UE can adjust the counter N by sensing the channel within an additional sensing time slot duration according to the following steps:

[0250] 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.

[0251] Step 2) (S240) If N > 0 and the UE determines to decrement the counter, the UE sets N to N - 1 (N = N - 1).

[0252] Step 3) (S250) The UE senses the channel within the additional sensing time slot duration. If the additional sensing time slot duration is idle (Yes), proceed to step 4. Otherwise (No), proceed to step 5.

[0253] Step 4) (S230) If N = 0 (Y), the UE terminates the CAP (S232). Otherwise (No), proceed to step 2.

[0254] Step 5) (S260) The UE senses the channel until a busy sensing time slot is detected within an additional delay duration T d or the additional delay duration T dAll time slots are idle.

[0255] Step 6) (S270) If it is sensed that the channel is idle (yes) for all time slot durations of the additional delay duration T d then proceed to Step 4. Otherwise (no), proceed to Step 5.

[0256] Table 11 shows that m p , minimum CW, maximum CW, maximum channel occupancy time (MCOT), and the allowed CW sizes vary according to the channel access priority class.

[0257] [Table 11]

[0258]

[0259] Referring to Table 11, the contention window size (CWS), 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 ).

[0260] Configure the delay duration T in the following order d : Duration T f (16 us) + m p consecutive sensing time slot durations T sl (9 us). T f includes the sensing time slot duration T sl at the start of the 16 us duration.

[0261] Satisfy 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 explicit / implicit reception response to the previous UL burst (e.g., PUSCH) before Step 1. For example, CW p can be initialized to CW min,p based on the explicit / implicit reception response to the previous UL burst. Alternatively, CW p can be increased to the next higher allowed value or remain the same.

[0262] (2)Type 2 Uplink (UL) CAP Method

[0263] In Type 2 UL CAP, the length of the duration spanned by the sensed time slots sensed idle before transmission can be determined. Type 2 UL CAP is divided into Type 2A / 2B / 2C UL CAP. In Type 2A UL CAP, the UE can perform transmission immediately after sensing the channel 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 sensed time slot duration immediately following the duration T f . In Type 2A UL CAP, T f includes a sensed time slot at its start. In Type 2B UL CAP, the UE can perform transmission immediately after sensing the channel idle for the sensing duration T f = 16 us. In Type 2B UL CAP, T f includes the sensed time slots within 9 us from the end of the duration. In Type 2C UL CAP, the UE does not perform channel sensing before performing transmission.

[0264] For example, according to the NR-U operation based on Type 1 LBT, a UE having uplink data to send can select the CAPC mapped to the data's 5QI, and the UE can perform the NR-U operation by applying the parameters of the corresponding CACP (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 the channel idle for the time T d (T d = T f + m p * T sl ), then the UE can attempt to send data by occupying the channel. For example, T sl (= 9 us) is the basic sensing unit or sensed time slot, and can include a measurement duration of at least 4 us. For example, the first 9 us (= 16 us) of T f can be configured as T sl .

[0265] For example, according to the NR-U operation based on Type 2 LBT, the UE can send data by performing Type 2 LBT (e.g., Type 2A LBT, Type 2B LBT, or Type 2C LBT) within the COT.

[0266] For example, Type 2A (also known as Cat-2 LBT (one-shot LBT) or one-shot LBT) can be a 25u one-shot LBT. In this case, the transmission can start immediately after an idle sensing for at least a 25us gap. Type 2A can be used to initiate the transmission of SSB and non-unicast DL information. That is, the UE can sense the channel for 25us within the COT, and if the channel is idle, the UE can attempt to send data by occupying the channel.

[0267] For example, Type 2B can be a 16us one-shot LBT. In this case, the transmission can start immediately after an idle sensing for a 16us gap. That is, the UE can sense the channel for 16us within the COT, and if the channel is idle, the UE can attempt to send data by occupying the channel.

[0268] 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, the transmission can start immediately after a gap up to 16us, and the channel may not be sensed before the transmission. The transmission duration may be up to 584us. The UE can attempt to transmit after 16us without sensing, and the UE can perform the transmission up to 584us.

[0269] In the sidelink unlicensed band, the UE can perform channel access operations based on Listen Before Talk (LBT). Before the UE accesses the channel in the unlicensed band, the UE should 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 transmit data) or busy (e.g., the channel is occupied and data is being sent / received on the corresponding channel, and the UE attempting to access the channel cannot send data when the channel is busy). That is, 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.

[0270] Meanwhile, in future systems, the UE may perform sidelink transmission and / or reception operations in the unlicensed band. For operations in the unlicensed band, depending on the regulations or requirements of a specific frequency band, the UE's transmission may precede the channel sensing operation (e.g., energy detection / measurement) for the channel to be used. Only if, as a result of the channel sensing, it is determined that the channel or 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 may perform transmission in the unlicensed band. And if, based on the result of the channel sensing, it is determined that the channel or set of RBs to be used is busy (e.g., if the measured energy is greater than or equal to or greater than a specific threshold), the UE may cancel all or part of the transmission in the unlicensed band.

[0271] Meanwhile, in operations in the unlicensed band, the UE may 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 time period, or conversely, after a specific time interval after transmission, the UE may decide whether to transmit after performing the normal channel sensing operation.

[0272] On the other hand, in transmissions in the unlicensed band, depending on the regulations or requirements, the time interval and / or the size of the frequency occupancy region and / or the power spectral density (PSD) of the signal / channel transmitted by the UE may be greater than or equal to a specific level, respectively.

[0273] On the other hand, in the unlicensed band, to simplify channel sensing, it may be informed that the channel obtained through the initial general channel sensing is occupied within a specific time period by the channel occupancy time (COT) interval information, and the length of the COT interval may be configured to have different maximum values depending on the priority of the service or data packet or the channel access priority class (CAPC).

[0274] On the one hand, the base station may share the COT duration ensured through channel sensing in the form of DCI transmission, and the UE may perform a specific (indicated) type of channel sensing and / or CP extension during the COT duration based on the DCI information received from the base station. On the other hand, the UE may share the COT duration ensured through channel sensing with the base station that is the destination of the UE's UL transmission, and may provide relevant information through CG-UCI via UL. In the above cases, the base station may perform simplified channel sensing within the COT duration shared by the UE.

[0275] In the case of SL communication, there are cases where the base station instructs the UE to use resources for SL transmission through DCI or RRC signaling, such as 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, such as mode 2 RA operation.

[0276] On the other hand, for channel access type 1 that can be used regardless of the Channel Occupancy Time (COT) configuration, the procedures shown in Tables 12 and 13 for DL transmission and Tables 14 and 15 for UL transmission are performed.

[0277] In the present disclosure, channel access can be interchanged / substituted with channel sensing.

[0278] [Table 12]

[0279]

[0280]

[0281] [Table 13]

[0282]

[0283]

[0284] [Table 14]

[0285]

[0286]

[0287] [Table 15]

[0288]

[0289]

[0290] 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 shown in Table 16 and the procedures for UL transmission shown in Table 17 are performed.

[0291] [Table 16]

[0292]

[0293]

[0294] [Table 17]

[0295]

[0296] According to an embodiment of the present disclosure, type 2A SL channel access may have a sensing interval of T_short_sl = 25 us and an interval of T_f = 16 us immediately following the sensing interval consisting of one sensing time slot, in the same manner as type 2A DL and / or UL channel access, where T_f includes a sensing time slot at the beginning. For basic idle determination, the DL or UL scheme may also be used.

[0297] According to an embodiment of the present disclosure, type 2B SL channel access may 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 a sensing time slot at the end of a 9 us interval. For basic idle determination, the DL or UL scheme may also be used.

[0298] According to an embodiment of the present disclosure, type 2C SL channel access may be performed in the same manner as type 2C DL and / or UL channel access, such that no channel sensing is performed. Instead, the time interval for SL transmission may be up to 584 us.

[0299] 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 is idle within a delay duration of size T_d corresponding to the priority class, the counter value is decremented to N - 1 in units of T_sl; and iii) if the counter value is zero, the UE may occupy the set of RBs or channels that have undergone channel sensing.

[0300] However, if some of the channel sensing results in the above T_sl interval are determined to be idle, the counter value may be maintained and channel sensing may continue until the channel sensing result of size T_d in units of the delay duration becomes idle again. Here, the delay duration of length T_d may 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 may be the time interval for channel sensing using T_sl = 9 us.

[0301] According to an embodiment of the present disclosure, when the UE has occupied a channel via type 1 SL channel access and the UE is not ready to transmit a sidelink transmission, the UE may immediately configure a delay duration of length T_d and a sensing interval of length T_sl before preparing to transmit a sidelink transmission, and if both are idle, the UE may immediately perform a sidelink transmission. Here, if any of them is busy, the UE may perform type 1 SL channel access again.

[0302] For example, if it is difficult to perform sidelink transmission at the end of channel sensing (e.g., if the end of channel sensing occurs after the start of sidelink transmission), the UE may reselect sidelink transmission resources. For example, the end time of channel sensing and / or the length of the remaining sensing interval may be considered to select the reselected resources. For example, the remaining sensing interval may be a value derived by assuming that the channel sensing is all idle.

[0303] For example, in the present disclosure, unlicensed spectrum may be interchangeable / substitutable with shared spectrum.

[0304] Meanwhile, in the present disclosure, the transmitting UE (i.e., TX UE) may be the UE that transmits data to the (target) receiving UE (i.e., RX UE). For example, the TX UE may be the UE that performs PSCCH transmission and / or PSSCH transmission. For example, the TX UE may be the UE that transmits SL CSI-RS and / or SL CSI report request indication to the (target) RX UE. For example, the TX UE may be the UE that transmits 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 may be the UE that transmits 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.

[0305] Meanwhile, in the present disclosure, the receiving UE (i.e., RX UE) may be the UE that sends SL HARQ feedback to the transmitting UE (i.e., TX UE) based on whether the data sent by the TX UE is successfully decoded and / or whether the PSCCH (related to PSSCH scheduling) sent by the TX UE is successfully detected / decoded. For example, the RX UE may be the UE that performs SL CSI transmission to the TX UE based on the SL CSI-RS and / or SL CSI report request indication received from the TX UE. For example, the RX UE may be the UE that sends the SL (L1) RSRP measurement value measured based on the (predefined) reference signal and / or SL (L1) RSRP report request indication received from the TX UE to the TX UE. For example, the RX UE may be the UE that sends its own data to the TX UE. For example, the RX UE may be the UE that performs SL RLM operation and / or SL RLF operation based on the (preconfigured) (control) channel and / or reference signal through the (control) channel received from the TX UE.

[0306] According to an embodiment of the present disclosure, when receiving the SL HARQ feedback information for the PSSCH (and / or PSCCH) received from the transmitting UE by the receiving UE, the following scheme (part) may be considered. For example, the corresponding scheme (part) may be restrictively applied only when the receiving UE has successfully decoded / detected the PSCCH scheduling the PSSCH.

[0307] - Option 1) Send NACK information only when the PSSCH decoding / reception fails

[0308] - Option 2) Send ACK information when the PSSCH decoding / reception is successful and send NACK information when it fails

[0309] Meanwhile, in the present disclosure, the TX UE may send all or part of the information described below to the RX UE via the SCI. Here, for example, the TX UE may send all or part of the information described below to the RX UE via the first SCI and / or the second SCI.

[0310] - PSSCH (and / or PSCCH) related resource allocation information (e.g., the number / position of time / frequency resources, resource reservation information (e.g., period))

[0311] - SL CSI report request indicator or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) report request indicator

[0312] - SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI information transmission indicator)) (on the PSSCH)

[0313] - Modulation and coding scheme (MCS) information

[0314] - Transmit power information

[0315] - L1 destination ID information and / or L1 source ID information

[0316] - SL HARQ process ID information

[0317] - New data indicator (NDI) information

[0318] - Redundancy version (RV) information

[0319] - (Transport service / packet related) QoS information (e.g., priority information)

[0320] - SL CSI-RS transmission indicator or information on the number of SL CSI-RS antenna ports (to be transmitted)

[0321] - Location information of the TX UE or location (or distance region) information of the target RX UE (for which SL HARQ feedback is requested).

[0322] - Reference signal (e.g., DM-RS, etc.) information related to channel estimation and / or decoding of data to be sent via the PSSCH. For example, the reference signal information may be information related to the pattern of (time-frequency) mapping resources of the DM-RS, rank information, antenna port index information, information about the number of antenna ports, etc.

[0323] Meanwhile, in the present disclosure, for example, the PSCCH may be replaced by / with at least one of the SCI, the first SCI (phase 1 SCI), and / or the second SCI (phase 2 SCI), or vice versa. For example, the SCI may be replaced by / with at least one of the PSCCH, the first SCI, and / or the second SCI, or vice versa. For example, the PSSCH may be replaced by / with the second SCI and / or the PSCCH, or vice versa.

[0324] Meanwhile, in the present disclosure, for example, if the SCI configuration field is divided into two groups considering the (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 one, and the SCI including the second SCI configuration field group may be referred to as the second SCI or the second one. 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 via the PSCCH. For example, the second SCI may be sent to the receiving UE via the (independent) PSCCH or may be transmitted piggybacked with the data via the PSSCH.

[0325] Meanwhile, in the present disclosure, for example, "configure" or "define" may mean (pre)configuration from the base station or the network. For example, "configure" or "define" may mean resource pool specific (pre)configuration from the base station or the 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 via predefined signaling. For example, the predefined signaling may include at least one of RRC signaling, MAC signaling, PHY signaling, and / or SIB.

[0326] Meanwhile, in the present disclosure, for example, "configure" or "define" may refer to specifying or configuring via preconfigured signaling between UEs. For example, information related to "configure" or "define" may be sent or received between UEs. For example, the predefined signaling may include at least one of RRC signaling, MAC signaling, PHY signaling, and / or SIB.

[0327] Also, in the present disclosure, for example, RLF can be replaced / substituted with out-of-sync (OOS) and / or in-sync (IS), or vice versa.

[0328] Also, in the present disclosure, for example, a resource block (RB) can be replaced / substituted with a subcarrier, or vice versa. For example, a packet or traffic can be replaced / substituted with a transport block (TB) or a media access control protocol data unit (MAC PDU) according to the transport layer, or vice versa. For example, a code block group (CBG) can be replaced / substituted with a TB, or vice versa. For example, a source ID can be replaced / substituted with a destination ID, or vice versa. For example, an L1 ID can be replaced / substituted with an L2 ID, or vice versa. For example, an L1 ID can be an L1 source ID or an L1 destination ID. For example, an L2 ID can be an L2 source ID or an L2 destination ID.

[0329] Also, in the present disclosure, for example, the operation of the TX UE to reserve / select / determine retransmission resources can 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.

[0330] Also, in the present disclosure, a sub-selection window can be replaced / substituted with a selection window and / or a pre-configured number of resource sets within the selection window, or vice versa.

[0331] Also, in the present disclosure, SL MODE 1 can refer to a resource allocation method or a 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 can refer to a resource allocation method or a 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 can 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 can be referred to as a MODE 2 UE or a MODE 2 TX UE.

[0332] Meanwhile, in the present disclosure, for example, a dynamic grant (DG) can be replaced / substituted with a configured grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, a combination of CG and SPS grants can be used to replace / substitute a DG, or vice versa. For example, the CG can 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 can be provided by RRC signaling and stored as a configured grant. For example, in CG type 2, the grant can be provided by PDCCH and 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 can allocate periodic resources to the TX UE via an RRC message. For example, in CG type 2, the base station can allocate periodic resources to the TX UE via an RRC message, and the base station can dynamically activate or deactivate the periodic resources via DCI.

[0333] Meanwhile, in the present disclosure, a signal can be used to replace / substitute a channel, or vice versa. For example, the transmission / reception of a channel can include the transmission / reception of a signal. For example, the transmission / reception of a signal can include the transmission / reception of a channel. For example, a broadcast can be replaced / substituted with at least one of unicast, multicast, and / or broadcast, or vice versa. For example, a broadcast type can be replaced / substituted with at least one of unicast, multicast, and / or broadcast, or vice versa. For example, a broadcast or a broadcast type can include unicast, multicast, and / or broadcast.

[0334] Meanwhile, in the present disclosure, a resource can be replaced / substituted with a time slot or a symbol, or vice versa. For example, a resource can include a time slot and / or a symbol.

[0335] Meanwhile, in the present disclosure, a priority can be replaced / substituted with at least one of a logical channel priority (LCP), a latency, a reliability, a minimum required communication range, a per-packet priority (PPPP), a sidelink radio bearer (SLRB), a QoS profile, QoS parameters, and / or requirements, or vice versa.

[0336] Meanwhile, 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 a PSFCH.

[0337] - SL HARQ feedback, SL CSI, SL (L1) RSRP

[0338] Meanwhile, 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.

[0339] For example, the transmitting UE may perform reservation of transmission resources based on a chain. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the receiving UE the location information of less than K transmission resources via an SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, for example, the SCI may include the location information of less than K transmission resources. Alternatively, for example, if the transmitting UE reserves K transmission resources related to a specific TB, the transmitting UE may transmit to the receiving UE the location information of less than K transmission resources via an SCI transmitted to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of less than K transmission resources. In this case, for example, by signaling the location information of less than K transmission resources to the receiving UE via only one SCI sent by the transmitting UE at any (or specific) transmission time or time resource, performance degradation due to excessive increase in the payload of the SCI can be prevented.

[0340] Figure 15 A method according to an embodiment of the present disclosure is shown, in which a UE having reserved transmission resources notifies another UE of the transmission resources. Figure 15 The embodiments of may be combined with various embodiments of the present disclosure.

[0341] Specifically, for example, Figure 15 (a) of shows a method for a transmitting UE to perform resource reservation based on the transmitting UE by sending / signaling the location information of (up to) 2 transmission resources to a receiving UE via one SCI in the case of a value of K = 4. For example, Figure 15 (b) of shows a method for a transmitting UE to perform resource reservation based on the transmitting UE chain by sending / signaling the location information of (up to) 3 transmission resources to a receiving UE via one SCI in the case of a value of K = 4. For example, referring to Figure 15 (a) and (b) of, the transmitting UE may 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) of, the transmitting UE may not only send / signal the location information of the fourth (or last) transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH, but also send / signal the location information of the third transmission-related resource. For example, referring to Figure 15 (b) of, the transmitting UE may not only send / signal the location information of the fourth transmission-related resource to the receiving UE, but also send / signal the location information of the second and third transmission-related resources to the receiving UE via the fourth (or last) transmission-related PSCCH. In this case, for example, inFigure 15 In (a) and (b) above, if the transmitting UE can send / signal the location information of the fourth (or last) transmission-related resource only 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 to a pre-configured value (e.g., 0). For example, in Figure 15 In (a) and (b) above, if the transmitting UE can send / signal the location information of the fourth (or last) transmission-related resource only to the receiving UE via the fourth (or last) transmission-related PSCCH, the field / bit of the location information of the unused or remaining transmission resources of the transmitting UE can be set or specified to a pre-configured status / bit value indicating / representing the last transmission (among 4 transmissions).

[0342] Meanwhile, for example, the transmitting UE can perform reservation of transmission resources based on blocks. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE can send the location information of the K transmission resources to the receiving UE via the SCI sent to the receiving UE at any (or a specific) transmission time or time resource. That is to say, the SCI can include the location information of the K transmission resources. For example, if the transmitting UE reserves K transmission resources related to a specific TB, the transmitting UE can transmit the location information of the K transmission resources to the receiving UE via the SCI sent to the receiving UE at any (or a specific) transmission time or time resource. That is to say, the SCI can include the location information of the K transmission resources. For example, Figure 15 (c) above shows a method for the transmitting UE to signal the location information of 4 transmission resources to the receiving UE via one SCI to perform block-based resource reservation in the case of K = 4.

[0343] According to an embodiment of the present disclosure, some or all of the following rules can be configured to apply to the signaling related to the COT sharing operation between UEs in the unlicensed band. Here, for example, when the UE - to - UE coordination (IUC) operation (e.g., the operation of exchanging (non - preferred) resource set information (and / or resource conflict indicators) between UEs) is not configured (enabled) together (on the resource pool and / or from the perspective of the UE), any (some or all) of the following rules can be applied only restrictively. In addition, for example, some or all of the rules of the present disclosure can be extended to the COT sharing operation between the base station and the UE.

[0344] For example, via the first SCI and / or the second SCI, it can be indicated whether the target receiver for COT sharing (e.g., the receiving UE) includes a receiver for PSCCH / PSSCH data sent by the UE providing the COT sharing information and / or whether the target receiver for COT sharing includes the UE indicated in the COT sharing information or the UE determined based on the ID information (e.g., (L1 or L2) source ID and / or (L1 or L1) destination ID).

[0345] For example, via the first SCI and / or the second SCI, it can be indicated whether the container used for transmitting the COT sharing information is the first SCI, the second SCI, the MAC CE, and / or the PC5-RRC signaling. For example, whether there is a MAC CE including the information for COT sharing can be indicated via the first SCI and / or the second SCI. For example, if it is indicated via the SCI above that the COT sharing information is sent in the MAC CE and / or the PC5-RRC signaling, a UE that is not a receiver of the PSCCH / PSSCH data including the COT sharing information can perform PSSCH decoding. For example, among the UEs that perform PSSCH decoding among the non-data receiver UEs, there can be a UE that is determined by (some) ID information (e.g., (some) (L1 or L2) source ID and / or (some) (L1 or L2) destination ID) provided as the COT sharing information in the first SCI and / or the second SCI. For example, (some) ID information can include additional IDs.

[0346] For example, the information for COT sharing included in the first SCI and / or the second SCI can include at least one of the (maximum) CAPC value information used at the start of the COT or available for COT sharing, the remaining COT duration information, the COT start offset, the RB set information for the COT, and / or the complete or remaining information of the COT shareable (destination) ID (e.g., (L1 and / or L2) source ID and / or (L1 or L2) destination ID). For example, the information can be included in respective fields included in the first SCI and / or the second SCI and transmitted.

[0347] For example, the information for COT sharing can include a status indicating no COT sharing or a combination of the above information values. For example, the first SCI can include a field indicating whether the transmission related to the first SCI includes information related to COT sharing. For example, based on the first SCI being sent in the shared spectrum, a field indicating whether the transmission related to the first SCI includes information related to COT sharing can be included in the first SCI. That is, if the first SCI is transmitted in the licensed band, a field indicating whether the transmission related to the first SCI includes information related to COT sharing may not be included in the first SCI.

[0348] Figure 16 shows the structure of a first SCI according to an embodiment of the present disclosure, and the fields included therein are different according to the spectrum for performing SL communication. Figure 16 Embodiments of may be combined with various embodiments of the present disclosure.

[0349] Referring to Figure 16 , a first SCI is shown, and its structure is different according to the spectrum for performing SL communication. For example, the first SCI may refer to a first-stage SCI or SCI format 1-A. For example, the first SCI may be transmitted via the PSCCH.

[0350] For example, if SL communication is performed in a shared spectrum (or in an unlicensed band), the first SCI may include a COT sharing flag field. For example, the COT sharing flag field may be a field that may include information related to whether the second SCI related to the PSCCH transmitting the first SCI includes COT sharing information.

[0351] Conversely, for example, if SL communication is performed in a licensed band, the first SCI may not include a COT sharing flag field. As in this embodiment, by conditionally determining whether the fields included in the SCI are included, an effect of allowing necessary information to be transmitted within the limited payload of the SCI can be produced.

[0352] For example, in the MAC CE and / or PC5-RRC signal, the information for COT sharing may include at least one of a COT sharable (destination) ID (e.g., (L1 or L2) source ID and / or (L1 or L1) destination ID), all or remaining information of the (L1 or L2) source ID and / or (L1 or L2) destination ID for UE transmission when COT is shared, and / or COT resource information for each sharable COT UE or ID (e.g., (L1 or L2) source ID or (L1 or L2) destination ID) (e.g., COT sharable (maximum) CAPC value information, remaining COT duration information, COT start offset, and / or RB set information for the COT).

[0353] For example, if the COT sharing information is transmitted via the first SCI and / or the second SCI, at least one RB set for transmitting the PSCCH and / or PSSCH including the first SCI and / or the second SCI may be the same as at least one RB set for transmitting the PSCCH / PSSCH including the COT sharing information. In other words, based on the same RB set as the RB set for transmitting the COT sharing information, the PSCCH / PSSCH transmission performed by the UE that has received the COT sharing information based on the COT sharing information can be executed.

[0354] For example, the UE may be configured not to expect the IUC information and the COT sharing information to be sent simultaneously on the same SCI, i.e., for example, the information shared by the IUC information and the COT may not coexist within one SCI.

[0355] Figure 17 The structure of a second SCI according to an embodiment of the present disclosure is shown, and the fields included therein are different according to the value set in the COT sharing flag field of the first SCI. Figure 17 The embodiments of can be combined with various embodiments of the present disclosure.

[0356] Referring to Figure 17 , the structure of the second SCI is shown, and the fields included therein are different based on the COT sharing flag field of the first SCI. For example, the second SCI may be a second-phase SCI (second-stage SCI) or any one of SCI formats 2-A, 2-B, 2-C, or 2-D. For example, the second SCI may be sent via the PSSCH.

[0357] For example, if the first SCI sent via the PSCCH associated with the PSSCH includes a COT sharing flag field and the value of this field is set to 1, the second SCI sent via the PSSCH may include a COT-related information field. For example, the COT-related information field may include a CAPC field (e.g., 2 bits) related to the generation of the COT, a COT sharing broadcast type field (e.g., 2 bits), a COT sharing additional ID field (e.g., 24 bits), and / or a remaining COT duration field (e.g., FLOOR(log 2 (10 * 2 u )) bits), etc. Here, if the COT-related information field is included in the second SCI as described above, the second SCI may not include an IUC information-related field, i.e., the IUC information association field and the COT-related field may not coexist on the second SCI.

[0358] Conversely, for example, if the first SCI sent via the PSCCH associated with the PSSCH does not include a COT sharing flag field, the second SCI sent via the PSSCH may not include a COT-related information field, or if the first SCI sent via the PSCCH associated with the PSSCH includes a COT sharing flag field, its value is set to zero. By conditionally causing the determination of whether a field is included in the SCI, as shown in this embodiment, the effect of allowing necessary information to be transmitted within the limited payload of the SCI can be achieved.

[0359] According to an embodiment of the present disclosure, if a PSCCH in which a first SCI is transmitted and a PSSCH in which a second SCI is transmitted are transmitted from a transmitting UE to a receiving UE based on at least one RB set, the PSCCH / PSSCH transmission performed by the receiving UE based on the COT-related information included in the second SCI may be the same as the at least one RB set. In other words, according to this embodiment, by using the RB set itself in which the COT-related information is transmitted as the information for the RB set related to COT, the information transmitted via the SCI can be reduced, thereby having the effect of reducing the limited SCI payload.

[0360] For example, for service type (and / or (LCH or service) priority and / or QoS requirements (e.g., latency, reliability, minimum communication range) and / or PQI parameters) (and / or HARQ-enabled (and / or disabled) LCH / MAC PDU (transmission) and / or CBR measurement values of a resource pool and / or SL broadcast type (e.g., unicast, multicast, broadcast) and / or SL multicast HARQ feedback options (e.g., NACK-only feedback, ACK / NACK feedback, NACK-only 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 / configured) on the resource pool and / or on the resource pool and / or source (L2) ID (and / or destination (L2) ID) and / or PC5 RRC connection link and / or SL link and / or connection status (e.g., RRC connection status, idle status, inactive status) and / or SL HARQ process (ID) and / or whether it is for performing SLDRX operations (of a transmitting UE or a receiving UE) and / or whether it is for saving (a 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 omitting PSFCH transmission (and / or PSFCH reception) (from the perspective of a specific UE) and / or the case where a receiving UE actually receives (re)transmissions of PSCCH (and / or PSSCH) from a transmitting UE continuously and / or the case where a (transmitting) UE performs packet transmission (and / or transmission resource (re)selection) to perform power saving operations (and / or SL DRX selector) and / or the case where a target (receiving) UE for transmitting a 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 initial transmission (and / or retransmission) (related to a TB) and / or the case of applying an interleaving-based structure (RB) and / or the case where (preconfigured) channel access (e.g., type 1, type 2A, type 2B, type 2C, semi-static channel occupancy) is performed and / or the case where (preconfigured) SL channel / signals (e.g., SL SSB, PSCCH, PSSCH, PSFCH) are transmitted / received and / or RB set (and / or channel and / or carrier) (for which channel access operations are performed in an unlicensed band) and / or COT (channel occupancy time) and / or TX burst and / or discovery burst), etc., of at least one (or each) of the elements / parametersWhether to apply the above rules (and / or the values of the parameters related to the solutions / rules proposed in this disclosure) can be specifically (or differently or independently) configured / enabled (and / or the application of the above rules can be limitedly configured / enabled). Additionally, combinations of the proposed solutions (and / or the proposed rules and / or embodiments) described in the present invention can be applied.

[0361] Furthermore, the term "configure" (or "specify") in this disclosure can be broadly interpreted as in the form of notifying the UE through predefined (physical layer or higher layer) channels / signals (e.g., SIB, RRC, MAC CE) (and / or in the form of pre-configuration support, and / or in the form of notifying another UE through predefined (physical layer or higher layer) channels / signals (e.g., SL MAC CE, PC5 RRC)), etc.

[0362] Additionally, the term "PSFCH" in this disclosure can be (internally) 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))".

[0363] Moreover, the solutions proposed in this disclosure can be combined with each other and extended (extended into new forms of solutions) for use. Additionally, in this disclosure, the term "active time" (and / or "on duration") in this disclosure can be (intermediately) extended to be "on duration" (and / or "active time").

[0364] According to an embodiment of this disclosure, the solution for determining the contention window size can be a solution that mixes and matches multiple solutions. For example, the solution can be that when there are multiple reference SL HARQ-ACK feedback groups, the CW value for all or each CAPC is maintained based on the determined result of the representative HARQ-ACK value for each group p value and / or if the result is not initialized to the initial value, the CW p value for all or each CAPC is increased to the next allowed value.

[0365] For example, if multiple factors are referred to when configuring the contention window size, and if the CW p value is increased to the next allowed value and the result of maintaining or initializing the CW p value occurs simultaneously as the determined result of each factor, the CW p value can be maintained and / or the CW p value can be initialized to the minimum value.

[0366] For example, if there are multiple factors being referred to when configuring the contention window size, and if the CW pThe value is increased to the next allowed value and the CW is maintained or initialized p If the results of the values occur simultaneously as the determined results of each factor, the CW p can be increased to the next allowed value.

[0367] According to an embodiment of the present disclosure, PSCCH / PSSCH that is referenced to determine the contention window size may be received within a specific time interval. For example, the specific time interval may exist within the earliest SL channel occupancy interval after the UE last updated its CW p and afterwards.

[0368] According to an embodiment of the present disclosure, the operation of initializing the CW p to the minimum value may be replaced by another specific value (e.g., a (pre)-configured value), and / or the specific value may be configured differently according to factors that control the size of the contention window.

[0369] In various embodiments of the present disclosure, for example, the reference duration may be an interval i) from the start of channel occupancy for the COT (for sidelink communication) occupied by the UE and / or the COT occupied by the base station 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 may be a PSCCH / PSSCH transmission for unicast and / or multicast and / or a PSCCH / PSSCH that enables SL HARQ-ACK feedback. For example, when the COT is initialized, the length of the reference interval may be (pre)-configured for each resource pool of the UE's SL transmission and / or each SL priority value.

[0370] In various embodiments of the present disclosure, the different combinations described above may be used, for example, according to whether the COT duration is initialized by the UE or the base station.

[0371] 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, respectively, with SL HARQ-ACK feedback enabled / disabled and / or for each SL HARQ-ACK feedback option. For example, the process of adjusting the size of the contention window may be performed for each case where the first UE sends SL to the second UE and to the third UE, respectively. For example, when adjusting the contention window size based on HARQ-ACK, the HARQ-ACK may be limited to a specific broadcast type and / or a specific unicast session.

[0372] In various embodiments of the present disclosure, for example, the size of the contention window for the sidelink can be adjusted based only on a specific broadcast type (e.g., unicast or multicast) that enables SL HARQ-ACK feedback and / or the PSSCH.

[0373] In various embodiments of the present disclosure, for example, initializing the value of CW_p to the corresponding minimum value can be applied by replacing the value of CW_p with a value that reduces the value of CW_p to a previously allowed value.

[0374] For example, when accessing a type 1 SL channel, the size of the contention window can be (pre)-configured per priority class and / or per SL priority and / or per 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.

[0375] 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 can be (pre)-configured and / or predefined per resource pool, and / or per SL BWP, and / or per RB set, and / or per carrier, and / or per SL transmission priority, and / or per representative transmission power value (range), and / or per congestion control level.

[0376] Various embodiments of the present disclosure can be applied to the above different combinations, for example, depending on whether the transmission is within or outside the COT (Channel Occupancy Time). 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 can be ensured, such as by stipulation, that no other technology shares the same channel or RB set within a time period. For example, in a semi-static COT for SL transmission, it can be ensured, such as by stipulation, that there are no DL and / or UL transmissions sharing the same channel or RB set within a specific time period. For example, in a semi-static COT, it can be ensured that there are no SL transmissions sharing the same channel or RB set, such as DL and / or UL transmissions, within a specific time period. For example, in a semi-static COT, it can be ensured, such as by stipulation, 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 time period.

[0377] 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 for each resource pool and / or each SL BWP and / or per carrier and / or RB set and / or according to the congestion control level and / or according to the SL transmission priority value (in advance). 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 overridden by PC5-RRC signaling. For example, the FFP configured to PC5-RRC can be used limitedly for unicast transmissions corresponding to the PC5-RRC connection. Various embodiments of the present disclosure can be applied in the form of the above different combinations according to different carriers with or without protection between RB sets or according to regulations.

[0378] Although various embodiments of the present disclosure describe changing the contention window size of all CAPCs, the idea of the present disclosure can be extended to include changing the contention window size according to a specific CAPC or SL priority value.

[0379] In various embodiments of the present disclosure, for example, according to the type of channel access and whether / how it is indicated, the scheme can be applied differently for each SL channel. In 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.

[0380] For example, the proposed method can be applied to the devices 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.

[0381] To protect the transmission opportunity in the unlicensed band (i.e., shared spectrum), Channel Occupancy Time (COT) is used. The transmitting UE can notify, via COT duration information, that it will occupy a channel protected by normal channel sensing within a specific time period, or the receiving UE can receive the COT duration information from the COT initiation, and can perform type 2 LBT operations on the (preferred) selected transmission resources within the COT to perform transmission operations in the unlicensed band. For resources outside the COT, the transmission resources can perform transmission operations by performing type 1 LBT operations based on random backoff.

[0382] For example, if the channel occupancy (CO) sharing information field is always present in the second SCI (SCI transmitted via PSSCH; may include SCI format 2-A, 2-B, 2-C, 2-D, etc.), regardless of whether the UE actually shares the generated / obtained CO with other UEs (i.e., if the conventional SL (data) communication field and the CO sharing information field are always present in the second SCI), the payload size of the second SCI may be unnecessarily increased and cause performance degradation problems.

[0383] In addition, for example, if the CO sharing information field is added to the second SCI format for UE - to - UE coordination (IUC) operations (i.e., SCI format 2 - C), the total payload of the second SCI may exceed the maximum payload size that the second SCI can support. Additionally, if a CO sharing information field with an unnecessarily large payload size is added to the second SCI, it may cause an excessive degradation compared to the coverage / decoding performance supported by the second SCI consisting only of the conventional SL (data) communication field.

[0384] In addition, for example, since the CO sharing information transmission is always performed in the form of PSCCH / PSSCH, a method that utilizes the (LBT success) RB set information related to the corresponding PSCCH / PSSCH transmission as part of the COT sharing information may be required.

[0385] According to various embodiments of the present disclosure, for example, in SL communication in an unlicensed band, the first SCI (i.e., the SCI transmitted via PSCCH) may include a field related to whether a COT sharing operation is performed.

[0386] For example, if the value of the field related to whether a COT sharing operation is performed in the first SCI is 1 (i.e., a COT sharing operation is performed), the second SCI includes a field related to COT sharing information, and the second SCI may not include a field related to IUC information. That is, for example, a field indicating whether there is a CO sharing information field on the second SCI may also be defined on the first SCI.

[0387] For example, the RB set for the COT sharing operation performed by the second device and the RB set of the COT actually used for PSCCH / PSSCH transmission may be the same, i.e., the information of the RB set for sharing CO (i.e., the RB set on which PSCCH / PSSCH transmission will be performed based on CO) may be (implicitly) regarded as the RB set for transmitting the PSCCH / PSSCH including the CO sharing information.

[0388] For example, on a second SCI, there may be no IUC information field and CO sharing information field at the same time. That is, only when the CO sharing information field on the first SCI indicates that no COT sharing information is provided on the second SCI, there is an IUC information field on the second SCI.

[0389] For example, according to various embodiments of the present disclosure, although the payload of the second SCI is limited, the embodiments of the present disclosure can compensate for the lack of the payload of the second SCI by conditionally changing the type of the fields included in the second SCI.

[0390] Specifically, according to various embodiments of the present disclosure, the problem of performance degradation that may be caused by unnecessarily increasing the payload size of the second SCI can be solved, the overdegradation compared to the coverage / decoding performance supported by the second SCI that only includes conventional SL (data) communication fields can be prevented, and by ensuring that the shared COT-based transmission is performed on the same RB set as the RB set that performs the CO sharing information transmission, the RB set information can be delivered without including additional RB set information in the CO sharing information being sent.

[0391] According to an embodiment of the present disclosure, SCI format 1-A can be used to schedule the PSSCH and the second-phase SCI on the PSSCH. For example, the COT sharing flag information can be sent via SCI format 1-A. For example, the number of bits of the COT sharing flag information can be determined to be 0 or 1 bit. For example, when configuring a parameter related to whether to perform communication based on shared spectrum from a higher layer (for example, transmissionStructureForPSCCHandPSSCH in SL-BWP-Config), the number of bits of the COT sharing flag information can be determined to be 1 bit. For example, if the parameter is not configured, the number of bits of the COT sharing flag information can be determined to be zero. For example, in the present disclosure, SCI format 1-A can be interchanged / replaced with the first SCI.

[0392] For example, based on the above CSI format 1-A, the second-phase SCI format can be determined, which can refer to Table 18 below.

[0393] [Table 18]

[0394]

[0395] For example, when the HARQ-ACK information includes ACK or NACK, or when there is no feedback of HARQ-ACK information, SCI format 2-A can be used together with HARQ operations to decode the PSSCH. For example, if the COT sharing flag field in SCI format 1-A exists and is set to 1, the CAPC field, COT sharing broadcast type field, COT sharing additional ID field, and remaining COT duration field can be configured in SCI format 2-A.

[0396] For example, the number of bits in the CAPC field can be 2 bits, and the values can be 00, 01, 10, and 11, corresponding to 1, 2, 3, and 4 respectively.

[0397] For example, the number of bits in the COT sharing broadcast type field can be 2 bits.

[0398] For example, the number of bits in the COT sharing additional ID field can be 24 bits. Here, the 16 LSBs can provide the L1 destination ID, and the 8 MSBs can provide the L1 source ID. For example, if the COT sharing broadcast type field is set to 00 or 01, the 8 MSBs are reserved.

[0399] For example, the number of bits in the remaining COT duration field can be bits. Here, the FLOOR function outputs the smallest integer greater than the input. For example, u can be a parameter related to the SCS.

[0400] For example, if the UE provides CO sharing information via unicast (or multicast or broadcast) PSCCH / PSSCH transmission within an RB set, the UE receiving the CO sharing information can perform unicast (or multicast or broadcast) PSCCH / PSSCH transmission of the shared CO within the RB set.

[0401] For example, if the UE provides CO sharing information via PSCCH / PSSCH transmission within an RB set, the UE receiving the CO sharing information can perform S-SSB / PSFCH transmission of the shared CO within the RB set.

[0402] Figure 18 A process for a first device to perform wireless communication according to an embodiment of the present disclosure is shown. Figure 18 The embodiments of can be combined with various embodiments of the present disclosure.

[0403] Refer to Figure 18, in step S1810, the first device may determine to perform wireless communication in the shared spectrum. For example, based on the wireless communication being determined to be performed in the shared spectrum, the first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation. In step S1820, the first device may determine whether to perform the COT sharing operation. For example, based on determining to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1. In step S1830, the first device may send the first SCI to the second device via a physical sidelink control channel (PSCCH) based on the first resources within the first resource block (RB) set.

[0404] For example, additionally, the first device may send a second SCI to the second device via a physical sidelink shared channel (PSSCH) based on the second resources within at least one second RB set including the first RB set. For example, based on the value of the field related to whether to perform the COT sharing operation being set to 1, the second SCI may include at least one field related to the information for the COT.

[0405] For example, the second SCI may include the information for the COT within at least one third RB set, and the information for the COT may be sent via at least one field related to the information for the COT.

[0406] For example, based on the second SCI including the information for the COT, the second SCI may not include a field related to the UE - to - UE coordination (IUC) information.

[0407] For example, additionally, the first device may obtain the information for the COT. For example, the COT may be obtained from the base station or a third device.

[0408] For example, additionally, the first device may obtain the information for the COT. For example, the COT may be generated by the first device based on channel sensing for the channel access procedure (CAP) for the second RB set.

[0409] For example, the second SCI may include a first source layer (L) 1 ID and a first destination L1 ID, and based on: the first source L1 ID being the same as the second destination L1 ID of the second device and the first destination L1 ID being the same as the second source L1 ID of the second device; or the first destination L1 ID being the same as the second destination L1 ID of the second device, the information for the COT may be used by the second device to perform at least one of the PSCCH transmission or the PSSCH transmission.

[0410] For example, the at least one second RB set based on which the transmission via the PSSCH is performed may be the same as the at least one third RB set related to the COT.

[0411] For example, at least one field may include a field related to a channel access priority class (CAPC) value, a field related to a broadcast type related to COT sharing operation, a field related to a layer 1 (L1) ID related to COT sharing operation, and a field related to a remaining COT duration related to COT.

[0412] For example, the L1 ID may be an additional ID related to a third device different from the second device.

[0413] For example, additionally, the first device may perform channel sensing for CAP for a first RB set. For example, a first SCI may be transmitted based on a result that the channel sensing is idle.

[0414] For example, a field related to whether to perform COT sharing operation may be a COT sharing flag field.

[0415] For example, it may be determined by a higher layer to perform wireless communication in a shared spectrum.

[0416] The above embodiments may be applied to various devices described below. First, the processor 102 of the first device 100 may determine to perform wireless communication in a shared spectrum. For example, based on the determination to perform wireless communication in a shared spectrum, a first side link control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation. And, the processor 102 of the first device 100 may determine whether to perform COT sharing operation. For example, based on the determination to perform COT sharing operation, the value of the field related to whether to perform COT sharing operation may be set to 1. And, the processor 102 of the first device 100 may control the transceiver 106 to send the first SCI to the second device through a physical side link control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0417] According to an embodiment of the present disclosure, a first device for performing wireless communication may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations. For example, the operations may include: determining to perform wireless communication in a shared spectrum, wherein, based on the determination to perform wireless communication in the shared spectrum, a first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein based on the determination to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1; and transmitting the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0418] For example, additionally, the first device may transmit a second SCI to the second device via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set. For example, based on the value of the field related to whether to perform the COT sharing operation being set to 1, the second SCI may include at least one field related to information for the COT.

[0419] For example, the second SCI may include information for the COT within at least one third RB set, and the information for the COT may be transmitted via at least one field related to the information for the COT.

[0420] For example, based on the second SCI including information for the COT, the second SCI may not include a field related to user equipment - to - user equipment coordination (IUC) information.

[0421] For example, additionally, the operations may further include: obtaining information for the COT. For example, the COT may be obtained from a base station or a third device.

[0422] For example, additionally, the operations may further include: obtaining information for the COT. For example, the COT may be generated by the first device based on channel sensing for a channel access procedure (CAP) for the second RB set.

[0423] For example, the second SCI may include a first source layer (L) 1 ID and a first destination L1 ID, and based on: the first source L1 ID being the same as the second destination L1 ID of the second device and the first destination L1 ID being the same as the second source L1 ID of the second device; or the first destination L1 ID being the same as the second destination L1 ID of the second device, information for COT may be used by the second device to perform at least one of PSCCH transmission or PSSCH transmission.

[0424] For example, at least one second RB set based on which transmission via PSSCH may be the same as at least one third RB set regarding COT.

[0425] For example, at least one field may include a field related to a channel access priority class (CAPC) value, a field related to a broadcast type related to COT sharing operation, a field related to a layer (L) 1 ID related to COT sharing operation, and a field related to a remaining COT duration related to COT.

[0426] For example, the L1 ID may be an additional ID related to a third device different from the second device.

[0427] For example, additionally, the operation may further include: performing channel sensing for CAP for a first RB set. For example, a first SCI may be sent based on a result that the channel sensing is idle.

[0428] For example, a field related to whether to perform COT sharing operation may be a COT sharing flag field.

[0429] For example, it may be determined by a higher layer to perform wireless communication in a shared spectrum.

[0430] According to an embodiment of the present disclosure, a device adapted to control a first user equipment (UE) may be proposed. For example, the device may include: at least one processor; and at least one memory operably 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: determining to perform wireless communication in a shared spectrum, wherein, based on determining to perform wireless communication in the shared spectrum, a first side link control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform COT sharing operation, wherein based on determining to perform COT sharing operation, a value of the field related to whether to perform COT sharing operation may be set to 1; and sending the first SCI to a second device via a physical side link control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0431] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, the first device may be caused to: determine to perform wireless communication in a shared spectrum, wherein based on the determination to perform wireless communication in the shared spectrum, a first sidelink control information (SCI) may include a field related to whether to perform a channel occupancy time (COT) sharing operation; determine whether to perform the COT sharing operation, wherein based on the determination to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation may be set to 1; and transmit the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

[0432] Figure 19 FIG. shows a process for a first device to perform wireless communication according to an embodiment of the present disclosure. Figure 19 The embodiments of may be combined with various embodiments of the present disclosure.

[0433] Reference Figure 19 , in step S1910, the second device may receive a first sidelink control information (SCI) from the first device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set. For example, wireless communication may be performed in a shared spectrum, and based on the determination to perform wireless communication in the shared spectrum, the first SCI may include a field related to whether to perform a channel occupancy time (COT) sharing operation.

[0434] For example, additionally, the second device may receive a second SCI from the first device via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set; and perform a PSCCH transmission or a PSSCH transmission to the first device based on a third resource within the COT. For example, based on the value of the field related to whether to perform the COT sharing operation being 1, the second SCI may include at least one field related to information for the COT, and the second SCI may include information for the COT within at least one second RB set.

[0435] The above embodiments may be applied to various devices described below. First, a processor 202 of the second device 200 may control a transceiver 206 to receive a first sidelink control information (SCI) from the first device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set. For example, wireless communication may be performed in a shared spectrum, and based on the determination to perform wireless communication in the shared spectrum, the first SCI may include a field related to whether to perform a channel occupancy time (COT) sharing operation.

[0436] 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 operably 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: receiving, from a first device, first sidelink control information (SCI) via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set, where wireless communication may be performed in a shared spectrum, and where, based on determining that wireless communication is to be performed in the shared spectrum, the first SCI may include a field related to whether to perform a channel occupancy time (COT) sharing operation.

[0437] For example, the operations may further include: receiving, from the first device, second SCI via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set; and performing a PSCCH transmission or a PSSCH transmission to the first device based on a third resource within the COT. For example, based on a value of a field related to whether to perform the COT sharing operation being 1, the second SCI may include at least one field related to information for the COT, and the second SCI may include information for the COT within at least one second RB set.

[0438] Various embodiments of the present disclosure may be combined with each other.

[0439] Hereinafter, devices to which respective embodiments of the present disclosure may be applied will be described.

[0440] Various descriptions, functions, processes, proposals, methods, and / or operation flows of the present disclosure described in this document may be applied to, but are not limited to, various fields that require wireless communication / connection (e.g., 5G) between devices.

[0441] Hereinafter, a more detailed description will be given with reference to the drawings. In the following drawings / description, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or functional blocks.

[0442] Figure 20 A communication system (1) according to an embodiment of the present disclosure is shown. Figure 20 Embodiments of may be combined with various embodiments of the present disclosure.

[0443] Refer to Figure 20, A communication system (1) applying various embodiments of the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device represents 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, without limitation, a robot (100a), a vehicle (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 with wireless communication capabilities, 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 can be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed 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 relative to other wireless devices.

[0444] 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 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.

[0445] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. 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 BS 200 / 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.

[0446] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection can be established by 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 device and the BS / wireless device can send / receive radio signals to / from each other via wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals via various physical channels. To this end, at least a part of the various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for sending / receiving radio signals can be performed based on various proposals of the present disclosure.

[0447] 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.

[0448] Referring to Figure 21 , the first wireless device (100) and the second wireless device (200) can send radio signals via various RATs (e.g., LTE and NR). Here, {the first wireless device (100) and the second wireless device (200)} can correspond to Figure 19 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)} in

[0449] 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 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 operation 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.

[0450] 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 send 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 send 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, a wireless device may represent a communication modem / circuit / chip.

[0451] 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.

[0452] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processor 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.

[0453] 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.

[0454] 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 procedures of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may 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 procedures disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals 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.

[0455] 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.

[0456] 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). The operations / functions of may be performed, without being limited to Figure 22 of Figure 21The processor (102, 202) and / or transceiver (106, 206). It can be implemented by Figure 21 The processor (102, 202) and / or transceiver (106, 206) to achieve Figure 22 The hardware components. For example, it can be implemented by Figure 21 The processor (102, 202) to implement blocks 1010 to 1060. Alternatively, it can be implemented by Figure 21 The processor (102, 202) to implement blocks 1010 to 1050, and it can be implemented by Figure 21 The transceiver (106, 206) to implement block 1060.

[0457] It can be via Figure 22 The signal processing circuit (1000) to convert the codeword into a radio signal. Here, the codeword is a coded bit sequence of an information block. The information block can include transport blocks (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal can be sent through various physical channels (e.g., PUSCH and PDSCH).

[0458] 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) on the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0459] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include a plurality of symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and a plurality of subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an upconverter.

[0460] It is possible to configure the signal processing process for the signal received in the wireless device in a manner opposite to the Figure 22 signal processing processes (1010~1060). For example, a wireless device (e.g., Figure 21 100, 200) may receive a radio signal from the outside through an antenna port / transceiver. The received radio signal may be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal may be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword may be restored to the original information block through decoding. Therefore, the signal processing circuit (not illustrated) for the received signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0461] Figure 23 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device may be implemented in various forms according to use cases / services (refer to Figure 20 ). Figure 23 The embodiments of

[0462] Referring to Figure 23 , the wireless devices (100, 200) may correspond to the Figure 21 wireless devices (100, 200), and may be configured by various elements, components, units / parts, and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional components (140). The communication unit may include a communication circuit (112) and one or more transceivers (114). For example, the communication circuit (112) may include Figure 21 one or more processors (102, 202) and / or one or more memories (104, 204) of 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 (130), and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) may 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) may 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).

[0463] The additional components (140) can be configured in various ways according to the type of the wireless device. For example, the additional components (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in forms including but not limited to: 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 use cases / services, the wireless device can be used in mobile or fixed locations.

[0464] 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 connected wirelessly 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 unit (e.g., 130, 140) can be connected wirelessly 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 (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.

[0465] Hereinafter, examples of implementing Figure 23 will be described in detail with reference to the accompanying drawings.

[0466] Figure 24 A handheld device according to an embodiment of the present disclosure is shown. 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

[0467] 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

[0468] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a BS. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 can include an application processor (AP). The memory unit 130 can store data / parameters / programs / codes / commands required to drive the handheld device 100. The memory unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and includes a wired / wireless charging circuit, a battery, etc. The interface unit 140b can support the connection of the handheld device 100 to other external devices. The interface unit 140b can include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). The I / O unit 140c can input or output video information / signals, audio information / signals, data, and / or information input by the user. The I / O unit 140c can include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0469] For example, in the case of data communication, the I / O unit 140c can acquire information / signals input by the user (e.g., touch, text, voice, image, or video), and the acquired information / signals can be stored in the memory unit 130. The communication unit 110 can convert the information / signals stored in the memory into a radio signal and directly send the converted radio signal to other wireless devices or to the BS. The communication unit 110 can receive a radio signal from other wireless devices or the BS and then restore the received radio signal to the original information / signals. The restored information / signals can be stored in the memory unit 130 and can be output through the I / O unit 140 in various types (e.g., text, voice, image, video, or haptic).

[0470] Figure 25 A vehicle or an autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or the autonomous vehicle can be implemented by a mobile robot, an automobile, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 25 Embodiments of can be combined with various embodiments of the present disclosure.

[0471] Referring to Figure 25 , the vehicle or the autonomous vehicle (100) can 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) can be configured as part of the communication unit (110). Blocks 110 / 130 / 140a to 140d respectively correspond to Figure 23frame 110 / 130 / 140.

[0472] The communication unit 110 can send 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 can perform various operations by controlling elements of the vehicle or autonomous driving vehicle 100. The control unit 120 can include an electronic control unit (ECU). The driving unit 140a can cause the vehicle or autonomous driving vehicle 100 to travel on the road. The driving unit 140a can include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b can supply power to the vehicle or autonomous driving vehicle 100, and can include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can acquire vehicle status, external environment information, user information, etc. The sensor unit 140c can 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 can 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.

[0473] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 can control the driving unit 140a so that the vehicle or autonomous driving vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can 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 can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and the driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle position, the autonomous driving path, and / or the driving plan to an external server. The external server can use AI technologies, 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.

[0474] 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 comprises: determining to perform wireless communication in a shared spectrum, wherein, based on determining to perform the wireless communication in the shared spectrum, a first sidelink control information (SCI) includes a field related to whether to perform a channel occupancy time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on determining to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation is set to 1; and sending the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

2. The method according to claim 1, further comprises: sending a second SCI to the second device via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set, wherein, based on the value of the field related to whether to perform the COT sharing operation being set to 1, the second SCI includes at least one field related to information for the COT.

3. The method according to claim 2, wherein, the second SCI includes information for the COT within at least one third RB set, and wherein the information for the COT is sent via the at least one field related to the information for the COT.

4. The method according to claim 3, wherein, based on the second SCI including information for the COT, the second SCI does not include a field related to UE - to - UE coordination (IUC) information.

5. The method according to claim 3, further comprises: obtaining information for the COT, wherein the COT is obtained from a base station or a third device.

6. The method according to claim 3, further comprises: obtaining information for the COT, wherein the COT is generated by the first device based on channel sensing for a channel access procedure (CAP) for the second RB set.

7. The method according to claim 3, wherein, the second SCI includes a first source layer (L)1 ID and a first destination L1 ID, and wherein, based on the following, the information for the COT is used by the second device to perform at least one of PSCCH transmission or PSSCH transmission: the first source L1 ID is the same as a second destination L1 ID of the second device; or the first destination L1 ID is the same as a second destination L1 ID of the second device.

8. The method according to claim 3, wherein, the at least one second RB set based on which the transmission via the PSSCH is performed is the same as the third RB set regarding the COT.

9. The method according to claim 2, wherein, The at least one field includes a field related to a Channel Access Priority Class (CAPC) value associated with the COT, a field related to a broadcast type associated with the COT sharing operation, a field related to a Layer (L) 1 ID associated with the COT sharing operation, and a field related to a remaining COT duration associated with the COT.

10. The method according to claim 9, wherein, the L1 ID is an additional ID associated with a third device different from the second device.

11. The method according to claim 1, wherein, further comprising: performing channel sensing on a CAP for a first RB set, wherein the first SCI is transmitted based on a result of the channel sensing being idle.

12. The method according to claim 1, wherein, the field related to whether to perform the COT sharing operation is a COT sharing flag field.

13. The method according to claim 1, wherein, it is determined by a higher layer that the wireless communication is to be performed in the shared spectrum.

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 operably connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations, wherein the operations include: determining to perform wireless communication in a shared spectrum, wherein, based on determining that the wireless communication is to be performed in the shared spectrum, a first SideLink Control Information (SCI) includes a field related to whether to perform a Channel Occupancy Time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on determining to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation is set to 1; and transmitting the first SCI to a second device via a Physical SideLink Control Channel (PSCCH) based on a first resource within a first Resource Block (RB) set.

15. A device adapted to control a first User Equipment (UE), the device comprising: at least one processor; and at least one memory operably 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: determining to perform wireless communication in a shared spectrum, wherein, based on determining that the wireless communication is to be performed in the shared spectrum, a first SideLink Control Information (SCI) includes a field related to whether to perform a Channel Occupancy Time (COT) sharing operation; determining whether to perform the COT sharing operation, wherein, based on determining to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation is set to 1; and transmitting the first SCI to a second device via a Physical SideLink Control Channel (PSCCH) based on a first resource within a first Resource Block (RB) set.

16. A non - transitory computer - readable storage medium storing instructions that, when executed, cause a first device to: Determine to perform wireless communication in a shared spectrum, wherein Based on determining to perform the wireless communication in the shared spectrum, a first sidelink control information (SCI) includes a field related to whether to perform a channel occupancy time (COT) sharing operation; Determine whether to perform the COT sharing operation, wherein, based on determining to perform the COT sharing operation, the value of the field related to whether to perform the COT sharing operation is set to 1; and Transmit the first SCI to a second device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set.

17. A method for a second device to perform wireless communication, the method comprising: Receiving the first sidelink control information (SCI) from a first device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set, wherein the wireless communication is performed in a shared spectrum, and wherein, based on determining to perform the wireless communication in the shared spectrum, the first SCI includes a field related to whether to perform a channel occupancy time (COT) sharing operation.

18. The method according to claim 17, further comprising: Receiving a second SCI from the first device via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set, wherein, based on the value of the field related to whether to perform the COT sharing operation being 1, the second SCI includes at least one field related to information for the COT, and wherein the second SCI includes information for the COT within the at least one second RB set; and Performing a PSCCH transmission or a PSSCH transmission to the first device based on a third resource within the COT.

19. A second device for performing wireless communication, the second device comprising: At least one transceiver; At least one processor; and At least one memory operably 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, wherein the operations include: Receiving the first sidelink control information (SCI) from a first device via a physical sidelink control channel (PSCCH) based on a first resource within a first resource block (RB) set, wherein the wireless communication is performed in a shared spectrum, and wherein, based on determining to perform the wireless communication in the shared spectrum, the first SCI includes a field related to whether to perform a channel occupancy time (COT) sharing operation.

20. The second device according to claim 19, wherein the operations further include: Receiving a second SCI from the first device via a physical sidelink shared channel (PSSCH) based on a second resource within at least one second RB set including the first RB set, Wherein, based on the value of the field related to whether to perform the COT sharing operation being 1, the second SCI includes at least one field related to the information for the COT, and wherein, the second SCI includes the information for the COT within the at least one second RB set; and Based on the third resource within the COT, perform PSCCH transmission or PSSCH transmission to the first device.

Images