Method and apparatus for selecting transmission resource for transmission of plurality of consecutive slots in shared spectrum

Abstract

An operating method of a first device (100) in a wireless communication system is presented. The method may comprise a step of omitting first resource reselection for a first consecutive slot resource on the basis that a plurality of first sensing slots related to a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and a second consecutive slot resource are consecutive.

Description

Method and apparatus for selecting a transmission resource for multiple consecutive slot transmissions in a shared spectrum

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

[0002] Sidelink (SL) refers to a communication method that establishes a direct link between User Equipment (UE) units, allowing them to directly exchange voice or data without passing through a Base Station (BS). SL is being considered as a solution to address the burden on base stations caused by rapidly increasing data traffic. V2X (vehicle-to-everything) refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-equipped objects via wired or wireless communication. V2X can be classified into four types: V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian). V2X communication can be provided through the PC5 interface and / or the Uu interface.

[0003] Meanwhile, as more communication devices require larger communication capacities, there is a growing need for improved mobile broadband communication compared to existing Radio Access Technology (RAT). Accordingly, communication systems that consider services or terminals sensitive to reliability and latency are being discussed. Next-generation radio access technology that considers improved mobile broadband communication, massive Machine Type Communication (MTC), and Ultra-Reliable and Low Latency Communication (URLC) can be referred to as new radio access technology (new RAT) or new radio (NR).

[0004] According to one embodiment of the present disclosure, a method that can be performed by a first device may be provided. For example, the method may include: selecting a first consecutive slot resource for the transmission of a first transmission block; selecting a second consecutive slot resource for the transmission of a second transmission block; omitting a first resource reselection for the first consecutive slot resource based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive; and performing a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that a plurality of second sensing slots associated with a plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

[0005] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and, based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, omit a first resource reselection for the first consecutive slot resource; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0006] According to one embodiment of the present disclosure, a processing device configured to control a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and, based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, omit a first resource reselection for the first consecutive slot resource; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0007] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, when the instructions are executed, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and omit a first resource reselection for the first consecutive slot resource based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0008] According to one embodiment of the present disclosure, a method that can be performed by a second device may be provided. For example, the method comprises: receiving a first transmission block based on a third consecutive slot resource from a first device; The method includes the step of receiving a second transmission block based on a fourth consecutive slot resource from the first device, wherein the third consecutive slot resource and the fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on a second resource re-selection, and the first resource re-selection for the first consecutive slot resource is omitted based on the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource being all busy sensing slots, and the first consecutive slot resource and the second consecutive slot resource being consecutive, and the second resource re-selection can be performed based on the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots being all busy sensing slots.

[0009] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the second device may: receive a first transmission block based on a third consecutive slot resource from the first device; and receive a second transmission block based on a fourth consecutive slot resource from the first device, wherein the third consecutive slot resource and the fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on a second resource re-selection, and the first resource re-selection for the first consecutive slot resource is omitted based on the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource being all busy sensing slots, and the first consecutive slot resource and the second consecutive slot resource being consecutive, and the second resource re-selection can be performed based on the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots being all busy sensing slots.

[0010] FIG. 1 shows a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0011] FIG. 2 shows an electromagnetic spectrum according to one embodiment of the present disclosure.

[0012] FIG. 3 shows the structure of an NR system according to one embodiment of the present disclosure.

[0013] FIG. 4 shows a radio protocol architecture according to one embodiment of the present disclosure.

[0014] FIG. 5 shows the structure of a wireless frame of NR according to one embodiment of the present disclosure.

[0015] FIG. 6 shows a slot structure of an NR frame according to one embodiment of the present disclosure.

[0016] FIG. 7 shows an example of a BWP according to one embodiment of the present disclosure.

[0017] FIG. 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a transmission mode, in accordance with one embodiment of the present disclosure.

[0018] FIG. 9 shows three cast types according to one embodiment of the present disclosure.

[0019] FIG. 10 shows an example of a wireless communication system that supports an unlicensed band according to one embodiment of the present disclosure.

[0020] FIG. 11 illustrates a method of occupying resources within an unlicensed band according to one embodiment of the present disclosure.

[0021] FIG. 12 illustrates a case in which a plurality of LBT-SBs are included within an unlicensed band according to one embodiment of the present disclosure.

[0022] FIG. 13 illustrates a CAP operation for downlink signal transmission through an unlicensed band of a base station according to one embodiment of the present disclosure.

[0023] FIG. 14 illustrates a Type 1 CAP operation of a terminal for uplink signal transmission according to one embodiment of the present disclosure.

[0024] FIG. 15 illustrates a competing operation for the channels of LBE and FBE according to one embodiment of the present disclosure.

[0025] FIG. 16 shows consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure.

[0026] FIG. 17 shows consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure.

[0027] FIG. 18 shows consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure.

[0028] FIG. 19 shows another consecutive slot resource to which consecutive slot resources are reselected, according to one embodiment of the present disclosure.

[0029] FIG. 20 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure.

[0030] FIG. 21 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure.

[0031] FIG. 22 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure.

[0032] FIG. 23 illustrates a procedure in which a first device performs wireless communication according to one embodiment of the present disclosure.

[0033] FIG. 24 illustrates a procedure in which a second device performs wireless communication according to one embodiment of the present disclosure.

[0034] FIG. 25 shows a communication system (1) according to one embodiment of the present disclosure.

[0035] FIG. 26 shows a wireless device according to one embodiment of the present disclosure.

[0036] FIG. 27 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0037] FIG. 28 shows a wireless device according to one embodiment of the present disclosure.

[0038] FIG. 29 shows a portable device according to one embodiment of the present disclosure.

[0039] FIG. 30 shows a vehicle or an autonomous vehicle according to one embodiment of the present disclosure.

[0040] In this specification, "A or B" may mean "only A," "only B," or "both A and B." Alternatively, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B and C."

[0041] A slash ( / ) or a comma used in this specification may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B or C."

[0042] In this specification, "at least one of A and B" may mean "only A," "only B," or "both A and B." Additionally, in this specification, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted as synonymous with "at least one of A and B."

[0043] Additionally, in this specification, "at least one of A, B and C" may mean "only A," "only B," "only C," or "any combination of A, B and C." Also, "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."

[0044] Additionally, parentheses used in this specification may mean "for example." Specifically, when indicated as "control information (PDCCH)," "PDCCH" may be proposed as an example of "control information." In other words, "control information" in this specification is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Furthermore, even when indicated as "control information (i.e., PDCCH)," "PDCCH" may be proposed as an example of "control information."

[0045] In the following explanation, 'when, if, in case of' can be replaced with 'based on'.

[0046] Technical features described individually within a single drawing in this specification may be implemented individually or simultaneously.

[0047] In this specification, a higher layer parameter may be a parameter that is set for the terminal, pre-set, or pre-defined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0048] The following technologies can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented using wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (global system for mobile communications), GPRS (general packet radio service), and EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented using wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (evolved UTRA). IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e. UTRA is part of UMTS (universal mobile telecommunications system). 3GPP (3rd generation partnership project) LTE (long term evolution) is part of E-UMTS (evolved UMTS) which uses E-UTRA (evolved-UMTS terrestrial radio access), employing OFDMA in the downlink and SC-FDMA in the uplink.LTE-A (advanced) is an evolution of 3GPP LTE.

[0049] 5G NR is a successor technology to LTE-A and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, ranging from low frequency bands below 1 GHz to mid-frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.

[0050] The 6G (wireless communication) system aims for (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be seen in four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy the requirements shown in Table 1 below. In other words, Table 1 is a table showing an example of the requirements for a 6G system.

[0051] Per device peak data rate1 TbpsE2E latency1 msMaximum spectral efficiency100bps / HzMobility supportUp to 1000km / hrSatellite integrationFullyAIFullyAutonomous vehicleFullyXRFullyHaptic CommunicationFully

[0052] 6G systems can have key factors such as eMBB (Enhanced mobile broadband), URLLC (Ultra-reliable low latency communications), 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.

[0053] FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 1 may be combined with various embodiments of the present disclosure.

[0054] 6G systems are expected to have 50 times higher simultaneous wireless connectivity than 5G wireless communication systems. URLLC, a key feature of 5G, will become an even more dominant technology in 6G communication by providing end-to-end latency of less than 1ms. Unlike the frequently used area spectrum efficiency, 6G systems will exhibit significantly superior volume spectrum efficiency. 6G systems can provide very long battery life and advanced battery technologies for energy harvesting, meaning mobile devices in 6G systems will not require separate charging. New network characteristics in 6G may include the following.

[0055] - Satellite Integrated Network: 6G is expected to be integrated with satellites to provide a global mobile population. Integrating terrestrial, satellite, and airborne networks into a single wireless communication system is crucial for 6G.

[0056] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is innovative and will update wireless evolution from "connected things" to "connected intelligence." AI can be applied at each stage of the communication process (or at each step of the signal processing described below).

[0057] - Seamless integration of wireless information and energy transfer: 6G wireless networks will transfer power to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0058] - Ubiquitous Super 3D Connectivity: Connectivity to the network and core network functions of drones and very low Earth orbit satellites will create Super 3D connectivity in 6G ubiquitous.

[0059] Some general requirements regarding the new network characteristics of 6G mentioned above may be as follows.

[0060] - Small cell networks: The idea of ​​small cell networks was introduced to improve the quality of received signals in cellular systems as a result of increased throughput, energy efficiency, and spectrum efficiency. Consequently, small cell networks are an essential feature of communication systems for 5G and beyond 5G (5GB). Therefore, 6G communication systems also adopt the characteristics of small cell networks.

[0061] - Ultra-dense heterogeneous network: Ultra-dense heterogeneous networks will be another important characteristic of 6G communication systems. Multi-tier networks composed of heterogeneous networks improve overall QoS and reduce costs.

[0062] - High-capacity backhaul: Backhaul connections are characterized as high-capacity backhaul networks to support high-volume traffic. High-speed fiber optics and free-space optics (FSO) systems can be possible solutions to this problem.

[0063] - Radar technology integrated with mobile technology: High-precision localization (or location-based services) through communication is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0064] - Softwarization and virtualization: Softwarization and virtualization are two important features that form the basis of the design process in 5GB networks to ensure flexibility, reconfigurability, and programmability. Additionally, billions of devices can be shared across a shared physical infrastructure.

[0065] The core implementation technologies of the 6G system are described below.

[0066] - Artificial Intelligence: AI is the most critical and newly introduced technology for 6G systems. AI was not involved in 4G systems. 5G systems will support AI partially or very limitedly. However, 6G systems will be supported by AI for complete automation. Advancements in machine learning will create more intelligent networks for real-time communication in 6G. Introducing AI into communications can streamline and enhance real-time data transmission. AI can determine how complex target tasks are performed using numerous analyses. In other words, AI can increase efficiency and reduce processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communication. Furthermore, AI can enable rapid communication in Brain-Computer Interfaces (BCI). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0067] - THz Communication: Data transmission rates can be increased by expanding bandwidth. This can be achieved by using sub-THz communication with wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, generally represent a frequency band between 0.1 THz and 10 THz with corresponding wavelengths in the range of 0.03 mm to 3 mm. The 100 GHz to 300 GHz band range (Sub-THz band) is considered the main part of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Among the defined THz bands, 300 GHz to 3 THz is located in the far-infrared (IR) frequency band. The 300 GHz to 3 THz band is part of the broadband but lies at the boundary of the broadband and immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarity to RF. FIG. 2 shows an electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of FIG. 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communication include (i) widely available bandwidth to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are indispensable). The narrow beam width generated by highly directional antennas reduces interference. The small wavelength of THz signals allows a much larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array techniques that can overcome range limitations.

[0068] - Large-scale MIMO technology

[0069] - Hologram Beamforming (HBF)

[0070] - Optical wireless technology

[0071] - Free Space Optical Transmission Backhaul Network (FSO Backhaul Network)

[0072] - Non-Terrestrial Networks (NTN)

[0073] - Quantum Communication

[0074] Cell-free Communication

[0075] - Integration of Wireless Information and Power Transmission

[0076] - Integration of Wireless Communication and Sensing

[0077] - Integrated Access and Backhaul Network

[0078] - Big data analysis

[0079] - Reconfigurable Intelligent Surface

[0080] - Metaverse

[0081] - Blockchain

[0082] - Unmanned Aerial Vehicle (UAV): UAVs, or drones, will become a critical element in 6G wireless communication. In most cases, high-speed data wireless connectivity is provided using UAV technology. BS entities are installed on UAVs to provide cellular connectivity. UAVs possess specific capabilities not found in fixed BS infrastructure, such as easy deployment, robust line-of-sight links, and controlled degrees of freedom for mobility. During emergencies, such as natural disasters, the deployment of ground communication infrastructure is not economically feasible, and sometimes services cannot be provided in volatile environments. UAVs can easily handle these situations. UAVs will become a new paradigm in the field of wireless communication. This technology facilitates the three fundamental requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support various purposes, such as enhancing network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most critical technologies for 6G communication.

[0083] - Autonomous Driving (Self-driving): For perfect autonomous driving, vehicles must communicate with each other to alert one another to dangerous situations, or communicate with infrastructure such as parking lots and traffic lights to verify information such as parking location and signal change times. V2X (Vehicle to Everything), a core element of building autonomous driving infrastructure, is a technology that enables vehicles to communicate and share with various elements on the road—including wireless communication between vehicles (V2V) and between vehicles and infrastructure (V2I)—to perform autonomous driving. Fast transmission speeds and low-latency technologies are essential to maximize autonomous driving performance and ensure high safety. Furthermore, as the volume of information to be transmitted and received becomes massive in the future as autonomous driving moves beyond simply delivering warning or guidance messages to drivers to actively intervene in vehicle operation and directly control the vehicle in dangerous situations, it is expected that 6G will be able to maximize autonomous driving capabilities through transmission speeds faster and lower latency than 5G.

[0084] For clarity of explanation, the description focuses on 5G NR, but the technical concept according to one embodiment of the present disclosure is not limited thereto. Various embodiments of the present disclosure may also be applied to 6G communication systems.

[0085] FIG. 3 shows the structure of an NR system according to one embodiment of the present disclosure. The embodiment of FIG. 3 can be combined with various embodiments of the present disclosure.

[0086] Referring to FIG. 3, the NG-RAN (Next Generation - Radio Access Network) may include a base station (20) that provides user plane and control plane protocol termination to a terminal (10). For example, the base station (20) may include a gNB (next generation-Node B) and / or an eNB (evolved-Node B). For example, the terminal (10) may be fixed or mobile and may be referred to by other terms such as MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), MT (Mobile Terminal), or Wireless Device. For example, the base station may be a fixed station communicating with the terminal (10) and may be referred to by other terms such as BTS (Base Transceiver System) or Access Point.

[0087] The embodiment of FIG. 3 illustrates a case including only gNB. Base stations (20) may be connected to each other via an Xn interface. Base stations (20) may be connected to a 5th generation core network (5G Core Network: 5GC) via an NG interface. More specifically, base stations (20) may be connected to an access and mobility management function (AMF) (30) via an NG-C interface and to a user plane function (UPF) (30) via an NG-U interface.

[0088] The layers of the Radio Interface Protocol between a terminal and a network can be classified into L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the lower three layers of the Open System Interconnection (OSI) model, which is widely known in communication systems. Among these, the Physical Layer, belonging to Layer 1, provides Information Transfer Services using a physical channel, while the Radio Resource Control (RRC) layer, located at Layer 3, performs the role of controlling radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0089] FIG. 4 illustrates a radio protocol architecture according to one embodiment of the present disclosure. The embodiment of FIG. 4 may be combined with various embodiments of the present disclosure. Specifically, FIG. 4(a) illustrates a radio protocol stack of the user plane for Uu communication, and FIG. 4(b) illustrates a radio protocol stack of the control plane for Uu communication. FIG. 4(c) illustrates a radio protocol stack of the user plane for SL communication, and FIG. 4(d) illustrates a radio protocol stack of the control plane for SL communication.

[0090] Referring to Fig. 4, the physical layer provides information transmission services to the upper layer using a physical channel. The physical layer is connected to the upper layer, the MAC (Medium Access Control) layer, through a transport channel. Data travels between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how and with what characteristics data is transmitted through a wireless interface.

[0091] Data travels between different physical layers, specifically between the physical layers of the transmitter and the receiver, through a physical channel. This physical channel can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as wireless resources.

[0092] The MAC layer provides services to the upper layer, the RLC (radio link control) layer, through logical channels. The MAC layer provides mapping functions from multiple logical channels to multiple transmission channels. Additionally, the MAC layer provides logical channel multiplexing functions through mapping from multiple logical channels to a single transmission channel. The MAC sublayer provides data transmission services over logical channels.

[0093] The RLC layer performs the concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs). To guarantee the various Quality of Service (QoS) required by the Radio Bearer (RB), the RLC layer provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Requests (ARQ).

[0094] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of wireless bearers. RB refers to the logical path provided by Layer 1 (physical layer or PHY layer) and Layer 2 (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transmission between a terminal and a network.

[0095] The functions of the PDCP layer in the user plane include the delivery of user data, header compression, and ciphering. The functions of the PDCP layer in the control plane include the delivery of control plane data and encryption / integrity protection.

[0096] The SDAP (Service Data Adaptation Protocol) layer is defined only in the user plane. The SDAP layer performs tasks such as mapping QoS flows between data radio bearers and marking QoS flow identifiers (IDs) within downlink and uplink packets.

[0097] The establishment of an RB refers to the process of defining the characteristics of the wireless protocol layer and channel to provide specific services, and setting their respective specific parameters and operating methods. RBs can be further divided into two types: SRBs (Signaling Radio Bearers) and DRBs (Data Radio Bearers). SRBs are used as a channel for transmitting RRC messages in the control plane, while DRBs are used as a channel for transmitting user data in the user plane.

[0098] When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state; otherwise, it is in the RRC_IDLE state. For NR, the RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state maintains a connection with the core network while being able to release the connection with the base station.

[0099] Downlink transmission channels for transmitting data from a network to a terminal include a Broadcast Channel (BCH) for transmitting system information and a Shared Channel (SCH) for transmitting user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be transmitted via the Shared Channel (SCH) or via a separate Multicast Channel (MCH). Meanwhile, uplink transmission channels for transmitting data from a terminal to a network include a Random Access Channel (RACH) for transmitting initial control messages and a Shared Channel (SCH) for transmitting user traffic or control messages.

[0100] Logical channels that are above the transmission channel and mapped to the transmission channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0101] FIG. 5 shows the structure of a wireless frame of NR according to one embodiment of the present disclosure. The embodiment of FIG. 5 can be combined with various embodiments of the present disclosure.

[0102] Referring to FIG. 5, radio frames can be used for uplink and downlink transmission in NR. The radio frame has a length of 10 ms and can be defined as two 5 ms half-frames (HF). A half-frame may contain five 1 ms subframes (SF). A subframe may be divided into one or more slots, and the number of slots within a subframe may be determined by the subcarrier spacing (SCS). Each slot may contain 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP).

[0103] When normal CP is used, each slot may contain 14 symbols. When extended CP is used, each slot may contain 12 symbols. Here, the symbols may include OFDM symbols (or CP-OFDM symbols) and SC-FDMA (Single Carrier - FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0104] Table 2 below shows the number of symbols per slot (N) according to the SCS setting (u) when Normal CP or Extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0105] CP Type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slotNormal CP 15kHz (u=0) 1410 130kHz (u=1) 1420 260kHz (u=2) 1440 4120kHz (u=3) 1480 8240kHz (u=4) 14160 16 Extended CP 60kHz (u=2) 1240 4

[0106] In an NR system, the OFDM(A) numerology (e.g., SCS, CP length, etc.) can be configured differently among multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., subframe, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) composed of the same number of symbols can be configured differently among the merged cells.

[0107] In NR, multiple numerologies or SCSs may be supported to support various 5G services. For example, if the SCS is 15 kHz, a wide area in traditional cellular bands may be supported, and if the SCS is 30 kHz / 60 kHz, dense-urban, lower latency, and wider carrier bandwidth may be supported. If the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.

[0108] The NR frequency band can be defined by two types of frequency ranges. The two types of frequency ranges may be FR1 and FR2. The numerical values ​​of the frequency ranges may change, for example, as shown in Table 3 below. Among the frequency ranges used in an NR system, FR1 may mean "sub 6GHz range" and FR2 may mean "above 6GHz range" and may be referred to as millimeter wave (mmW).

[0109] Frequency Range designationCorresponding frequency rangeSubcarrier Spacing (SCS)FR1450MHz - 6000MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0110] As described above, the numerical value of the frequency range of the NR system may change. For example, FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included within FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for vehicles (e.g., autonomous driving).

[0111] Frequency Range designationCorresponding frequency rangeSubcarrier Spacing (SCS)FR1410MHz - 7125MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0112] FIG. 6 shows a slot structure of an NR frame according to one embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.

[0113] Referring to FIG. 6, a slot contains multiple symbols in the time domain. For example, in the case of a normal CP, one slot may contain 14 symbols, but in the case of an extended CP, one slot may contain 12 symbols. Alternatively, in the case of a normal CP, one slot may contain 7 symbols, but in the case of an extended CP, one slot may contain 6 symbols.

[0114] A carrier includes multiple subcarriers in the frequency domain. A Resource Block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) can be defined as multiple consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed through the active BWPs. Each element can be referred to as a Resource Element (RE) in a resource grid and can be mapped to a single complex symbol.

[0115] The Bandwidth Part (BWP) and Carrier are described below.

[0116] A BWP (Bandwidth Part) may be a continuous set of PRBs (physical resource blocks) in a given numerology. A PRB may be selected from a continuous subset of CRBs (common resource blocks) for a given numerology on a given carrier.

[0117] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the terminal may not monitor downlink radio link quality on DL BWPs other than the active DL BWP on the PCell (primary cell). For example, the terminal may not receive PDCCH, PDSCH (physical downlink shared channel), or CSI-RS (reference signal) (except RRM) outside of the active DL BWP. For example, the terminal may not trigger Channel State Information (CSI) reporting for inactive DL BWPs. For example, the terminal may not transmit PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel) outside of the active UL BWP. For example, in the case of a downlink, the initial BWP may be given as a successive set of RBs for the RMSI (remaining minimum system information) CORESET (control resource set) (set by the PBCH (physical broadcast channel)). For example, in the case of an uplink, the initial BWP may be given by the SIB (system information block) for the random access procedure. For example, the default BWP may be set by the upper layer. For example, the initial value of the default BWP may be the initial DL BWP. For energy saving, if the terminal does not detect DCI (downlink control information) for a certain period, the terminal may switch the terminal's active BWP to the default BWP.

[0118] Meanwhile, a BWP may be defined for an SL. The same SL BWP may be used for transmission and reception. For example, a transmitting terminal may transmit an SL channel or an SL signal on a specific BWP, and a receiving terminal may receive an SL channel or an SL signal on said specific BWP. In a licensed carrier, an SL BWP may be defined separately from a Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP. For example, a terminal may receive a configuration for an SL BWP from a base station / network. For example, a terminal may receive a configuration for a Uu BWP from a base station / network. An SL BWP may be (pre-)configured within the carrier for out-of-coverage NR V2X terminals and RRC_IDLE terminals. For a terminal in RRC_CONNECTED mode, at least one SL BWP may be activated within the carrier.

[0119] FIG. 7 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure. In the embodiment of FIG. 7, it is assumed that there are three BWPs.

[0120] Referring to FIG. 7, the common resource block (CRB) may be a numbered carrier resource block extending from one end of the carrier band to the other. And, the PRB may be a numbered resource block within each BWP. Point A may indicate a common reference point for the resource block grid.

[0121] BWP is point A, offset from point A (N start BWP ) and bandwidth (N sizeBWP It can be set by ). For example, point A may be an external reference point of the PRB of a carrier where the subcarrier 0 of all numerologies (e.g., all numerologies supported by the network in that carrier) is aligned. For example, offset may be the PRB interval between the lowest subcarrier in a given numerology and point A. For example, bandwidth may be the number of PRBs in a given numerology.

[0122] V2X or SL communication will be explained below.

[0123] SLSS (Sidelink Synchronization Signal) is an SL-specific sequence that may include PSSS (Primary Sidelink Synchronization Signal) and SSSS (Secondary Sidelink Synchronization Signal). The PSSS may be referred to as S-PSS (Sidelink Primary Synchronization Signal), and the SSSS may be referred to as S-SSS (Sidelink Secondary Synchronization Signal). For example, length-127 M-sequences may be used for S-PSS, and length-127 Gold sequences may be used for S-SSS. For example, a terminal may use S-PSS to detect the initial signal and obtain synchronization. For example, a terminal may use S-PSS and S-SSSS to obtain detailed synchronization and detect the synchronization signal ID.

[0124] PSBCH (Physical Sidelink Broadcast Channel) may be a (broadcast) channel through which basic (system) information that a terminal must know first is transmitted before transmitting or receiving SL signals. For example, the basic information may include information related to SLSS, Duplex Mode (DM), TDD UL / DL (Time Division Duplex Uplink / Downlink) configuration, information related to resource pools, types of applications related to SLSS, subframe offsets, broadcast information, etc. For example, to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0125] S-PSS, S-SSS, and PSBCH may be included in a block format that supports periodic transmission (e.g., SL SS (Synchronization Signal) / PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB may have the same numerology (i.e., SCS and CP lengths) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) within the carrier, and the transmission bandwidth may be within a (pre-)set SL BWP (Sidelink BWP). For example, the bandwidth of the S-SSB may be 11 RB (Resource Block). For example, the PSBCH may span 11 RB. Additionally, the frequency position of the S-SSB may be (pre-)set. Therefore, the terminal does not need to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0126] FIG. 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a transmission mode, in accordance with one embodiment of the present disclosure. The embodiment of FIG. 8 may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for convenience of explanation, the transmission mode in LTE may be referred to as an LTE transmission mode, and the transmission mode in NR may be referred to as an NR resource allocation mode.

[0127] For example, FIG. 8(a) illustrates a terminal operation associated with LTE transmission mode 1 or LTE transmission mode 3. Or, for example, FIG. 8(a) illustrates a terminal operation associated with NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to general SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0128] For example, FIG. 8(b) illustrates a terminal operation associated with LTE transmission mode 2 or LTE transmission mode 4. Or, for example, FIG. 8(b) illustrates a terminal operation associated with NR resource allocation mode 2.

[0129] Referring to FIG. 8(a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station may schedule SL resources to be used by the terminal for SL transmission. For example, in step S800, the base station may transmit information related to SL resources and / or information related to UL resources to the first terminal. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0130] For example, the first terminal may receive information related to a dynamic grant (DG) resource and / or information related to a configured grant (CG) resource from the base station. For example, the CG resource may include a CG type 1 resource or a CG type 2 resource. In this specification, the DG resource may be a resource that the base station sets / assigns to the first terminal via downlink control information (DCI). In this specification, the CG resource may be a (periodic) resource that the base station sets / assigns to the first terminal via DCI and / or RRC messages. For example, in the case of a CG type 1 resource, the base station may transmit an RRC message containing information related to the CG resource to the first terminal. For example, in the case of a CG type 2 resource, the base station may transmit an RRC message containing information related to the CG resource to the first terminal, and the base station may transmit DCI related to the activation or release of the CG resource to the first terminal.

[0131] In step S810, the first terminal may transmit a PSCCH (e.g., Sidelink Control Information or 1st-stage SCI) to the second terminal based on the resource scheduling. In step S820, the first terminal may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) associated with the PSCCH to the second terminal. In step S830, the first terminal may receive a PSFCH associated with the PSCCH / PSSCH from the second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second terminal via the PSFCH. In step S840, the first terminal may transmit / report the HARQ feedback information to the base station via a PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on HARQ feedback information received from the second terminal. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on a pre-set rule. For example, the DCI may be a DCI for scheduling SL. For example, the format of the DCI may be DCI format 3_0 or DCI format 3_1.

[0132] Referring to FIG. 8(b), in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the terminal can determine an SL transmission resource within an SL resource set by the base station / network or a preset SL resource. For example, the set SL resource or the preset SL resource may be a resource pool. For example, the terminal may autonomously select or schedule a resource for SL transmission. For example, the terminal may perform SL communication by independently selecting a resource within the set resource pool. For example, the terminal may independently select a resource within a selection window by performing a sensing and resource (re)selection procedure. For example, the sensing may be performed on a subchannel basis. For example, in step S810, the first terminal, which independently selected a resource within the resource pool, uses the resource to [transmit] PSCCH (e.g., SCI (Sidelink Control Information) or 1 st -stage SCI) can be transmitted to the second terminal. In step S820, the first terminal transmits the PSSCH associated with the PSCCH (e.g., 2 nd -stage SCI, MAC PDU, data, etc.) can be transmitted to the second terminal. In step S830, the first terminal can receive PSFCH associated with PSCCH / PSSCH from the second terminal.

[0133] Referring to FIG. 8(a) or (b), for example, the first terminal may transmit an SCI to the second terminal over the PSCCH. Or, for example, the first terminal may transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal over the PSCCH and / or PSSCH. In this case, the second terminal may decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal. In this specification, the SCI transmitted over the PSCCH is 1 st SCI, The 1st SCI, 1 st -stage SCI or 1 st It can be called a -stage SCI format, and the SCI transmitted over PSSCH is 2 nd SCI, 2nd SCI, 2 nd -stage SCI or 2 nd It can be called a -stage SCI format. For example, 1 st -stage SCI formats may include SCI format 1-A, and 2 nd -stage SCI format may include SCI format 2-A and / or SCI format 2-B.

[0134] Referring to FIG. 8 (a) or (b), in step S830, the first terminal can receive PSFCH. For example, the first terminal and the second terminal can determine a PSFCH resource, and the second terminal can use the PSFCH resource to transmit HARQ feedback to the first terminal.

[0135] Referring to FIG. 8(a), in step S840, the first terminal can transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0136] FIG. 9 illustrates three cast types according to one embodiment of the present disclosure. The embodiment of FIG. 9 may be combined with various embodiments of the present disclosure. Specifically, FIG. 9 (a) illustrates broadcast type SL communication, FIG. 9 (b) illustrates unicast type SL communication, and FIG. 9 (c) illustrates group cast type SL communication. In the case of unicast type SL communication, a terminal may perform one-to-one communication with another terminal. In the case of group cast type SL communication, a terminal may perform SL communication with one or more terminals within the group to which it belongs. In various embodiments of the present disclosure, SL group cast communication may be replaced with SL multicast communication, SL one-to-many communication, etc.

[0137] Meanwhile, conventional NR-U (unlicensed spectrum) supports a method of communication between a terminal and a base station in the unlicensed band. In addition, Rel-18 is scheduled to support a mechanism that enables communication between sidelink terminals in the unlicensed band.

[0138] In the present disclosure, a channel may refer to a set of frequency-axis resources that perform Listen-Before-Talk (LBT). In NR-U, a channel may mean a 20 MHz LBT bandwidth and may have the same meaning as an RB set. For example, an RB set may be defined in Section 7 of 3GPP TS 38.214 V17.0.0.

[0139] In the present disclosure, CO (channel occupancy) may refer to time / frequency axis resources acquired by a base station or terminal after a successful LBT.

[0140] In the present disclosure, channel occupancy time (COT) may refer to a time-axis resource acquired by a base station or terminal after a successful LBT. The CO may be shared between the base station (or terminal) that acquired the CO and the terminal (or base station), and this may be referred to as COT sharing. Depending on the initiating device, this may be referred to as gNB-initiated COT or UE-initiated COT.

[0141] Below, a wireless communication system that supports the unlicensed band (shared spectrum) is described.

[0142] FIG. 10 illustrates an example of a wireless communication system supporting an unlicensed band according to one embodiment of the present disclosure. For example, FIG. 10 may include an NR-U (unlicensed spectrum) wireless communication system. An embodiment of FIG. 10 may be combined with various embodiments of the present disclosure.

[0143] In the following description, a cell operating in the licensed band (hereinafter, L-band) may be defined as LCell, and the carrier of the LCell may be defined as (DL / UL / SL) LCC. Additionally, a cell operating in the unlicensed band (hereinafter, U-band) may be defined as UCell, and the carrier of the UCell may be defined as (DL / UL / SL) UCC. The cell's carrier / carrier-frequency may refer to the cell's operating frequency (e.g., center frequency). The cell / carrier (e.g., CC) is collectively referred to as the cell.

[0144] As shown in FIG. 10(a), when a terminal and a base station transmit and receive signals through carrier-coupled LCCs and UCCs, the LCC may be set as PCC (Primary CC) and the UCC may be set as SCC (Secondary CC). As shown in FIG. 10(b), the terminal and the base station may transmit and receive signals through a single UCC or multiple carrier-coupled UCCs. That is, the terminal and the base station may transmit and receive signals through only UCC(s) without LCC. For standalone operation, PRACH, PUCCH, PUSCH, SRS transmission, etc. may be supported in the UCELL.

[0145] In the embodiment of FIG. 10, the base station may be replaced with a terminal. In this case, for example, PSCCH, PSSCH, PSFCH, S-SSB transmission, etc. may be supported in the UCELL.

[0146] Unless otherwise noted, the following definitions may apply to terms used in this specification.

[0147] - Channel: Consists of a series of RBs in which channel access procedures are performed in the shared spectrum, and may refer to a carrier or a part of a carrier.

[0148] - Channel Access Procedure (CAP): Represents a procedure for evaluating channel availability based on sensing to determine whether other communication node(s) are using the channel before signal transmission. The basic unit for sensing is T sl = It is a sensing slot with a duration of 9us. A base station or terminal senses the channel during the sensing slot period, and the power detected for at least 4us within the sensing slot period is the energy detection threshold X Thresh If smaller, sensing slot interval T sl is considered to be in an idle state. Otherwise, the sensing slot interval T sl=9us is considered a busy state. CAP can be referred to as LBT (Listen-Before-Talk).

[0149] - Channel occupancy: Refers to the corresponding transmission(s) on the channel(s) by the base station / terminal after performing the channel access procedure.

[0150] - Channel Occupancy Time (COT): Refers to the total time during which any base station / terminal(s) sharing channel occupancy with said base station / terminal can perform transmission(s) on the channel after the base station / terminal has performed the channel access procedure. When determining the COT, if the transmission gap is 25 µs or less, the gap period is also counted in the COT. The COT may be shared for transmission between the base station and the corresponding terminal(s).

[0151] - DL transmission burst: Defined as a set of transmissions from a base station without gaps exceeding 16us. Transmissions from a base station separated by gaps exceeding 16us are considered as separate DL transmission bursts. The base station can perform transmission(s) after the gap without sensing channel availability within the DL transmission burst.

[0152] - UL or SL transmission burst: Defined as a set of transmissions from a terminal without gaps exceeding 16us. Transmissions from a terminal separated by gaps exceeding 16us are considered as distinct UL or SL transmission bursts. The terminal may perform transmission(s) after the gap without sensing channel availability within the UL or SL transmission burst.

[0153] - Discovery burst: Refers to a DL transmission burst comprising a set of signal(s) and / or channel(s) that is limited within a (time) window and associated with a duty cycle. In an LTE-based system, the discovery burst is a transmission(s) initiated by a base station, comprising PSS, SSS, and CRS (cell-specific RS), and may further comprise a non-zero power CSI-RS. In an NR-based system, the discovery burst is a transmission(s) initiated by a base station, comprising at least an SS / PBCH block, and may further comprise a CORESET for a PDCCH scheduling a PDSCH having SIB1, a PDSCH carrying SIB1, and / or a non-zero power CSI-RS.

[0154] FIG. 11 illustrates a method of occupying resources within an unlicensed band according to one embodiment of the present disclosure. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.

[0155] Referring to FIG. 11, a communication node (e.g., base station, terminal) within an unlicensed band must determine whether other communication node(s) are using the channel before transmitting a signal. To this end, the communication node within the unlicensed band may perform a Channel Access Procedure (CAP) to access the channel(s) where the transmission(s) are to be performed. The Channel Access Procedure may be performed based on sensing. For example, the communication node may first perform Carrier Sensing (CS) before transmitting a signal to check whether other communication node(s) are transmitting a signal. The case where it is determined that other communication node(s) are not transmitting a signal is defined as having confirmed Clear Channel Assessment (CCA). A predefined or upper layer (e.g., RRC) CCA threshold (e.g., X) ThreshIf ) is present, the communication node may determine the channel state as busy if energy higher than the CCA threshold is detected in the channel, and as idle otherwise. If the channel state is determined to be idle, the communication node may start signal transmission in the unlicensed band. CAP can be replaced with LBT.

[0156] Table 5 illustrates the channel access procedures (CAP) supported in NR-U.

[0157] TypeExplanationDLType 1 CAPCAP with random back-off- time duration spanned by the sensing slots that are sensed to be idle before a downlink transmission(s) is randomType 2 CAP- Type 2A, 2B, 2CCAP without random back-off- time duration spanned by sensing slots that are sensed to be idle before a downlink transmission(s) is deterministicUL or SLType 1 CAPCAP with random back-off- time duration spanned by the sensing slots that are sensed to be idle before an uplink or sidelink transmission(s) is randomType 2 CAP- Type 2A, 2B, 2CCAP without random back-off- time duration spanned by sensing slots that are sensed to be idle before an uplink or sidelink transmission(s) is deterministic

[0158] Referring to Table 5, LBT types or CAPs for DL / UL / SL transmissions may be defined. However, Table 5 is merely an example, and new types or CAPs may be defined in a similar manner. For example, Type 1 (also called Cat-4 LBT) may be a random back-off based channel access procedure. For example, in the case of Cat-4, the contention window may vary. For example, Type 2 can be performed in case of COT sharing within COT acquired by gNB or UE.

[0159] The LBT-SB (SubBand) (or RB set) will be explained below.

[0160] In a wireless communication system supporting an unlicensed band, a single cell (or carrier (e.g., CC)) or BWP configured for a terminal may be configured as a wideband with a Bandwidth (BW) larger than that of existing LTE; however, based on regulations, etc., the BW that requires CCA based on independent LBT operation may be limited. If the sub-band (SB) where individual LBT is performed is defined as an LBT-SB, multiple LBT-SBs may be included within a single wideband cell / BWP. The RB set constituting the LBT-SB may be configured through upper layer (e.g., RRC) signaling. Therefore, based on (i) the BW of the cell / BWP and (ii) RB set allocation information, one or more LBT-SBs may be included in a single cell / BWP.

[0161] FIG. 12 illustrates a case in which a plurality of LBT-SBs are included within an unlicensed band according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.

[0162] Referring to FIG. 12, a BWP of a cell (or carrier) may include multiple LBT-SBs. The LBT-SBs may have a band of, for example, 20 MHz. The LBT-SBs consist of multiple consecutive (P)RBs in the frequency domain and may be referred to as (P)RB sets. Although not illustrated, a guard band (GB) may be included between the LBT-SBs. Thus, the BWP may be configured in the form of {LBT-SB #0 (RB set #0) + GB #0 + LBT-SB #1 (RB set #1 + GB #1) + ... + LBT-SB #(K-1) (RB set (#K-1))}. For convenience, the LBT-SB / RB index may be set / defined to increase as it goes from a low frequency band to a high frequency band.

[0163] The following describes CAPC (channel access priority class).

[0164] The CAPCs of MAC CEs and wireless bearers can be fixed or configured to operate in FR1:

[0165] - Padding BSR (buffer status report) and recommended bit rate MAC CE are fixed to the lowest priority;

[0166] - Fixed to highest priority for SRB0, SRB1, SRB3, and other MAC CEs;

[0167] - Configured by the base station for SRB2 and DRB.

[0168] When selecting a CAPC for a DRB, the base station considers the 5QIs of all QoS flows multiplexed to the DRB, while also considering fairness between different traffic types and transmissions. Table 6 indicates which CAPC should be used for standardized 5QIs, that is, the CAPC to be used for a given QoS flow. For standardized 5QIs, CAPCs are defined as shown in the table below, and for non-standardized 5QIs, the CAPC that best matches the QoS characteristics should be used.

[0169] CAPC5QI11, 3, 5, 65, 66, 67, 69, 70, 79, 80, 82, 83, 84, 8522, 7, 7134, 6, 8, 9, 72, 73, 74, 764 - NOTE: A lower CAPC value indicates a higher priority.

[0170] The following describes a method for transmitting downlink signals through an unlicensed band. For example, the method for transmitting downlink signals through an unlicensed band can be applied to a method for transmitting sidelink signals through an unlicensed band.

[0171] A base station may perform one of the following channel access procedures (CAP) for downlink signal transmission in the unlicensed band.

[0172] (1) Type 1 Downlink (DL) CAP method

[0173] In a Type 1 DL CAP, the length of the time interval spanned by the sensing slot sensed idle before the transmission(s) is random. A Type 1 DL CAP can be applied to the following transmissions.

[0174] - (i) a unicast PDSCH having user plane data, or (ii) a unicast PDSCH having user plane data and a unicast PDCCH scheduling user plane data, or, transmission(s) initiated by a base station, comprising,

[0175] - Transmission(s) initiated by a base station having only a discovery burst, or (ii) a discovery burst multiplexed with non-unicast information.

[0176] FIG. 13 illustrates a CAP operation for downlink signal transmission through an unlicensed band of a base station according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

[0177] Referring to Fig. 13, the base station first has a deferred duration T d During the sensing slot interval, it is sensed whether the channel is in an idle state, and then when counter N becomes 0, transmission can be performed (S134). At this time, counter N is adjusted by sensing the channel during additional sensing slot interval(s) according to the procedure below:

[0178] Step 1)(S120) N=N init Set to. Here, N init It starts from 0 and goes up to CW p It is a random value evenly distributed between. Then proceed to Step 4.

[0179] Step 2)(S140) If N>0 and the base station chooses to decrease the counter, set N=N-1.

[0180] Step 3) (S150) Sensing the channel during the additional sensing slot interval. At this time, if the additional sensing slot interval is idle (Y), move to Step 4. If not (N), move to Step 5.

[0181] Step 4) (S130) If N=0 (Y), terminate the CAP procedure (S132). Otherwise (N), proceed to Step 2.

[0182] Step 5)(S160) Additional delay interval T d If a busy sensing slot is detected within, or an additional delay interval T d Sensing the channel until all sensing slots within are detected as idle.

[0183] Step 6)(S170) Additional delay interval T d If the channel is sensed as idle during all sensing slot intervals (Y), proceed to Step 4. Otherwise (N), proceed to Step 5.

[0184] Table 7 shows the m applied to the CAP according to the channel access priority class. p , examples of changes in the minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes.

[0185] Channel Access Priority Class (p)m p CW min,p CW max,p T mcot,p allowed CW p sizes11372 ms{3,7}217153 ms{7,15}3315638 or 10 ms{15,31,63}471510238 or 10 ms{15,31,63,127,255,511,1023}

[0186] Referring to Table 7, the contention window size (CWS), maximum COT value, etc., can be defined for each CAPC. For example, T d = T f + m p * T sl It could be.

[0187] Delay interval T d is interval T f (16us) + m p T consecutive sensing slot intervals sl It consists of the sequence (9us). T f is the sensing slot interval T at the start of the 16us interval. sl Includes

[0188] CW min,p <= CW p <= CW max,p is. CW p is CW p = CW min,p It is set to and can be updated prior to Step 1 based on HARQ-ACK feedback (e.g., ACK or NACK ratio) for the previous DL burst (e.g., PDSCH) (CW size update). For example, CW p Based on HARQ-ACK feedback for the previous DL burst, CW min,p It can be initialized to, increased to the next highest allowed value, or the existing value can be kept.

[0189] (2) Type 2 Downlink (DL) CAP method

[0190] In a Type 2 DL CAP, the length of the time interval spanned by the sensing slot that is sensed idle before the transmission(s) is deterministic. Type 2 DL CAPs are classified into Type 2A / 2B / 2C DL CAPs.

[0191] Type 2A DL CAP can be applied to the following transmissions. In Type 2A DL CAP, the base station at least has a sensing interval T short_dl A transmission can be sent immediately after the channel is sensed as idle for 25us. Here, T short_dl is interval T f It consists of (=16us) and a single sensing slot interval immediately following it. T fIt includes a sensing slot at the start point of the interval.

[0192] - (i) having only a discovery burst, or (ii) having a discovery burst multiplexed with non-unicast information, transmission(s) initiated by a base station, or,

[0193] - Base station transmission(s) after a 25us gap from transmission(s) by the terminal within shared channel occupancy.

[0194] Type 2B DL ​​CAP is applicable to transmission(s) performed by the base station after a 16 µs gap from transmission(s) by the terminal within the shared channel occupancy time. In Type 2B DL ​​CAP, the base station T f A transmission can be sent immediately after the channel is sensed as idle for 16us. T f It includes a sensing slot within the last 9us of the interval. Type 2C DL CAP is applicable to transmission(s) performed by the base station after a gap of up to 16us from transmission(s) by the terminal within the shared channel occupancy time. In Type 2C DL CAP, the base station does not sense the channel before performing the transmission.

[0195] The following describes a method for transmitting uplink signals through an unlicensed band. For example, the method for transmitting uplink signals through an unlicensed band can be applied to a method for transmitting sidelink signals through an unlicensed band.

[0196] The terminal performs a Type 1 or Type 2 CAP for uplink signal transmission in an unlicensed band. Generally, the terminal can perform a CAP (e.g., Type 1 or Type 2) set by the base station for uplink signal transmission. For example, the terminal may include CAP type indication information within a UL grant (e.g., DCI format 0_0, 0_1) that schedules a PUSCH transmission.

[0197] (1) Type 1 Uplink (UL) Cap Method

[0198] In a Type 1 UL CAP, the length of the time interval spanned by the sensing slot sensed idle before the transmission(s) is random. A Type 1 UL CAP can be applied to the following transmissions.

[0199] - Scheduled and / or configured PUSCH / SRS transmission(s) from the base station

[0200] - Scheduled and / or configured PUCCH transmission(s) from the base station

[0201] - Transmission(s) related to RAP (Random Access Procedure)

[0202] FIG. 14 illustrates a Type 1 CAP operation of a terminal for uplink signal transmission according to one embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0203] Referring to FIG. 14, the terminal first has a deferred duration T d During the sensing slot interval, it is sensed whether the channel is in an idle state, and then when counter N becomes 0, transmission can be performed (S234). At this time, counter N is adjusted by sensing the channel during additional sensing slot interval(s) according to the procedure below:

[0204] Step 1)(S220) N=N init Set to. Here, N init It starts from 0 and goes up to CW p It is a random value evenly distributed between. Then proceed to Step 4.

[0205] Step 2)(S240) If N>0 and the terminal chooses to decrease the counter, set N=N-1.

[0206] Step 3) (S250) Sensing the channel during the additional sensing slot interval. At this time, if the additional sensing slot interval is idle (Y), move to Step 4. If not (N), move to Step 5.

[0207] Step 4) (S230) If N=0 (Y), terminate the CAP procedure (S232). Otherwise (N), proceed to Step 2.

[0208] Step 5)(S260) Additional delay interval T d If a busy sensing slot is detected within, or an additional delay interval T d Sensing the channel until all sensing slots within are detected as idle.

[0209] Step 6)(S270) Additional delay interval T d If the channel is sensed as idle during all sensing slot intervals (Y), proceed to Step 4. Otherwise (N), proceed to Step 5.

[0210] Table 8 shows the m applied to the CAP according to the channel access priority class. p , examples of changes in minimum CW, maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes.

[0211] Channel Access Priority Class (p)m p CW min,p CW max,p T ulmcot,p allowed CW p sizes12372 ms{3,7}227154 ms{7,15}331510236 or 10 ms{15,31,63,127,255,511,1023}471510236 or 10 ms{15,31,63,127,255,511,1023}

[0212] Referring to Table 8, the contention window size (CWS), maximum COT value, etc., can be defined for each CAPC. For example, T d = T f + m p * T sl It could be.

[0213] Delay interval T d is interval T f (16us) + m p T consecutive sensing slot intervals sl It consists of the sequence (9us). T f is the sensing slot interval T at the start of the 16us interval. sl Includes

[0214] CW min,p <= CW p <= CW max,p is. CW p is CW p = CW min,p It is set to and can be updated prior to Step 1 based on explicit / implicit reception responses to the previous UL burst (e.g., PUSCH) (CW size update). For example, CW p Based on explicit / implicit reception responses to previous UL bursts, CW min,p It can be initialized to, increased to the next highest allowed value, or the existing value can be kept.

[0215] (2) Type 2 Uplink (UL) Cap Method

[0216] In a Type 2 UL CAP, the length of the time interval spanned by the sensing slot sensed idle prior to the transmission(s) is deterministic. Type 2 UL CAPs are classified into Type 2A / 2B / 2C UL CAPs. In a Type 2A UL CAP, the terminal has at least the sensing interval T short_dlA transmission can be sent immediately after the channel is sensed as idle for 25us. Here, T short_dl is interval T f It consists of (=16us) and a single sensing slot section immediately following it. In Type 2A UL CAP, T f It includes a sensing slot at the start point of the interval. In a Type 2B UL CAP, the terminal has a sensing interval T f Transmission can be sent immediately after the channel is sensed as idle for 16us. In Type 2B UL CAP, T f It includes a sensing slot within the last 9us of the interval. In Type 2C UL CAP, the terminal does not sense the channel before performing transmission.

[0217] For example, according to Type 1 LBT-based NR-U operation, a terminal having uplink data to transmit can select a CAPC mapped to the 5QI of the data, and the terminal [can] select the parameters of the corresponding CAPC (e.g., minimum contention window size, maximum contention window size), m pNR-U operation can be performed by applying methods such as... For example, the terminal can select a Backoff Counter (BC) after selecting a random value between 0 and CW (e.g., a CW value randomly selected by the terminal between the minimum CW and maximum CW mapped to the CAPC). In this case, for example, BC can be a positive integer less than or equal to the random value. For example, the terminal senses the channel for a time Td (Td = Tf + mp * Tsl), and if it determines that the channel is idle, it decreases BC by 1. When BC becomes zero, the terminal can occupy the channel and attempt to transmit data. If a collision is detected while data transmission is attempted, the terminal can increase the CW size mapped to the CAPC. Additionally, for example, the terminal can randomly re-select BC from the range of 0 and the CW re-selected through the increased CW. For example, a terminal that has successfully transmitted a packet can initialize the CW size (to the default value mapped to SL-CAPC).

[0218] For example, T sl (= 9 usec) is a basic sensing unit or sensing slot and may include a measurement duration of at least 4 usec. For example, T f The first 9 usec of (= 16 usec) is T sl It can be composed of. For example, mp is a constant mapped by CAPC and can be used in Td calculation, and the lower the CACP value (the higher the priority), the smaller the value can be mapped.

[0219] For example, according to the Type 2 LBT-based NR-U operation, the terminal can perform data transmission by performing Type 2 LBT (e.g., Type 2A LBT, Type 2B LBT, Type 2C LBT) within the COT.

[0220] For example, Type 2A (also called Cat-2 LBT (one shot LBT) or one-shot LBT) can be a 25 usec one-shot LBT. In this case, transmission can begin immediately after idle sensing for at least a 25 usec gap. Type 2A can be used to initiate SSB and non-unicast DL information transmission. That is, the terminal can sense the channel for 25 usec within the COT, and the terminal can occupy the channel and attempt to transmit data when the channel is idle.

[0221] For example, Type 2B can be a 16 usec one-shot LBT. In this case, transmission can begin immediately after idle sensing for a 16 usec gap. That is, the terminal can sense the channel for 16 usec within the COT, and when the channel is idle, the terminal can occupy the channel and attempt to transmit data.

[0222] For example, in the case of Type 2C (also called Cat-1 LBT or No LBT), LTB may not be performed. In this case, transmission may begin immediately after a gap of up to 16 usec and may not sense the channel prior to said transmission. The duration of said transmission may be up to 584 usec. The terminal may attempt transmission after 16 usec without sensing, and the terminal may perform transmission for up to 584 usec.

[0223] In the sidelink unlicensed band, a terminal can perform a channel access operation based on LBT (Listen Before Talk). Before accessing a channel in the unlicensed band, the terminal must check whether the access channel is idle (e.g., a state where the terminal does not occupy the channel, a state where terminals can access the channel and transmit data) or busy (e.g., a state where the channel is occupied and data transmission / reception operations are performed on the channel, a terminal attempting to access the channel cannot transmit data if the channel is busy). In other words, the operation of the terminal checking whether the channel is idle or busy can be called CCA (Clear Channel Assessment), and the terminal can check whether the channel is idle or busy during the CCA duration.

[0224] Referring to standard documents, some procedures and technical specifications related to the present disclosure may be as follows.

[0225] The MAC layer may be configured with a DRX function by the RRC, and said DRX function may control the terminal's PDCCH monitoring operation for the MAC layer's C-RNTI, CI-RNTI, CS-RNTI, INT-RNTI, SFI-RNTI, SP-CSI-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, TPC-SRS-RNTI, and AI-RNTI. When using the DRX operation, the MAC layer may also monitor the PDCCH in accordance with the requirements described in other sections of this disclosure. In the RRC_CONNECTED state, if the DRX is configured, the MAC layer may monitor the PDCCH discontinuously for all active serving cells using the DRX operation specified in this section, otherwise the MAC layer may monitor the PDCCH.

[0226] NOTE 1: If SL resource allocation mode 1 is set by RRC, the DRX function may not be set.

[0227] RRC can control DRX operation by setting the following parameters:

[0228] drx-onDurationTimer: Duration at the start of the DRX cycle;

[0229] drx-SlotOffset: delay time before starting drx-onDurationTimer;

[0230] drx-InactivityTimer: Duration since the PDCCH opportunity in which the PDCCH directed a new UL or DL ​​transmission to the MAC layer;

[0231] drx-RetransmissionTimerDL (per DL HARQ process excluding broadcast processes): maximum duration until DL retransmission is received;

[0232] drx-RetransmissionTimerUL (UL HARQ per process): Maximum duration until a grant for UL retransmission is received;

[0233] drx-LongCycleStartOffset: Defines the subframes where the long and short DRX cycles start, using long DRX cycle and drx-StartOffset;

[0234] drx-ShortCycle (Option): Short DRX Cycle;

[0235] drx-ShortCycleTimer (optional): duration for which the terminal follows a short DRX cycle;

[0236] drx-HARQ-RTT-TimerDL (DL per HARQ process excluding broadcast processes): Minimum duration before the MAC layer expects a DL allocation for HARQ retransmission;

[0237] drx-HARQ-RTT-TimerUL (UL HARQ per process): Minimum duration before the MAC layer expects a UL HARQ retransmission grant;

[0238] ps-Wakeup (optional): Setting to start the associated drx-onDurationTimer if DCP is monitored but not detected;

[0239] ps-TransmitOtherPeriodicCSI (optional): A setting to report non-L1-RSRP periodic CSI on PUCCH for the time specified by drx-onDurationTimer when DCP is configured but the associated drx-onDurationTimer has not started;

[0240] ps-TransmitPeriodicL1-RSRP (optional): Configuration to transmit periodic CSIs that are L1-RSRP on PUCCH for the time specified by drx-onDurationTimer when DCP is configured but the associated drx-onDurationTimer has not started.

[0241] Serving cells in the MAC layer can be configured by RRC into two DRX groups with different DRX parameters. If RRC does not configure a secondary DRX group, only one DRX group exists, and all serving cells can belong to that DRX group. If two DRX groups are configured, each serving cell is uniquely assigned to one of the two groups. The DRX parameters configured separately for each DRX group are drx-onDurationTimer and drx-InactivityTimer. The DRX parameters configured commonly across DRX groups are drx-SlotOffset, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, drx-LongCycleStartOffset, drx-ShortCycle (optional), drx-ShortCycleTimer (optional), drx-HARQ-RTT-TimerDL, and drx-HARQ-RTT-TimerUL.

[0242] If a DRX cycle is configured, the active time of serving cells within the DRX group may include the following periods:

[0243] The time during which drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is active; or

[0244] The time during which drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is active in any serving cell within the DRX group; or

[0245] ra-ContentionResolutionTimer or msgB-Time during which ResponseWindow is active; or

[0246] The time a scheduling request has been sent on PUCCH and is waiting; or

[0247] The time during which a PDCCH directing a new transmission addressed to the MAC layer's C-RNTI has not yet been received after successfully receiving a random access response for a random access preamble among contention-based random access preambles that the MAC layer did not select.

[0248] If DRX is configured, the MAC layer may need to perform the following:

[0249] 1> When a MAC PDU is received from a configured downlink assignment:

[0250] 2> At the first symbol after the end of the corresponding transmission containing DL HARQ feedback, drx-HARQ-RTT-TimerDL can be started for the corresponding HARQ process;

[0251] 2> You can stop drx-RetransmissionTimerDL for the relevant HARQ process.

[0252] 1> If a MAC PDU is transmitted from the configured UL grant and no LBT failure instruction is received from the lower layer:

[0253] 2> At the first symbol after the end of the first iteration of the corresponding PUSCH transmission, drx-HARQ-RTT-TimerUL can be started for the corresponding HARQ process;

[0254] 2> You can stop drx-RetransmissionTimerUL for the relevant HARQ process.

[0255] 1> If drx-HARQ-RTT-TimerDL has expired:

[0256] 2> If the data for the corresponding HARQ process was not successfully decoded:

[0257] 3> At the first symbol after the expiration of drx-HARQ-RTT-TimerDL, drx-RetransmissionTimerDL can be started for the corresponding HARQ process.

[0258] 1> If drx-HARQ-RTT-TimerUL has expired:

[0259] 2> At the first symbol after the expiration of drx-HARQ-RTT-TimerUL, drx-RetransmissionTimerUL can be started for the corresponding HARQ process.

[0260] 1> If DRX Command MAC CE or long DRX Command MAC CE is received:

[0261] 2> You can stop drx-onDurationTimer for each DRX group;

[0262] 2> You can stop drx-InactivityTimer for each DRX group.

[0263] 1> If drx-InactivityTimer expires for the DRX group:

[0264] 2> If Short DRX Cycle is set:

[0265] 3> At the first symbol after drx-InactivityTimer expires, drx-ShortCycleTimer can be started or restarted for the corresponding DRX group;

[0266] 3> Short DRX cycles can be used for the corresponding DRX group.

[0267] 2> If not:

[0268] 3> Long DRX cycles can be used for the corresponding DRX group.

[0269] 1> When DRX command MAC CE is received:

[0270] 2> If Short DRX Cycle is set:

[0271] 3> At the first symbol after the DRX command MAC CE reception ends, drx-ShortCycleTimer can be started or restarted for each DRX group;

[0272] 3> Short DRX cycles can be used for each DRX group.

[0273] 2> If not:

[0274] 3> Long DRX cycles can be used for each DRX group.

[0275] 1> If drx-ShortCycleTimer has expired for the DRX group:

[0276] 2> Long DRX cycles can be used for the corresponding DRX group.

[0277] 1> When a long DRX command MAC CE is received:

[0278] 2> You can stop drx-ShortCycleTimer for each DRX group;

[0279] 2> Long DRX cycles can be used for each DRX group.

[0280] 1> Short DRX cycle is being used against the DRX group, and

[0281] If [(SFN Х 10) + subframe number] modulo (drx-ShortCycle) = (drx-StartOffset) modulo (drx-ShortCycle):

[0282] 2> After drx-SlotOffset from the start of the subframe, drx-onDurationTimer can be started for the corresponding DRX group.

[0283] 1> A long DRX cycle is being used against the DRX group, and

[0284] If [(SFN Х 10) + subframe number] modulo (drx-LongCycle) = drx-StartOffset:

[0285] 2> If DCP monitoring is enabled for the active DL BWP:

[0286] 3> If a DCP instruction associated with the current DRX cycle is received from a lower layer and instructs to start drx-onDurationTimer; or

[0287] 3> If all DCP opportunities associated with the current DRX cycle have occurred in the time domain, and occurred within the active time considering the Grant / Assignment / DRX Command MAC CE / Long DRX Command MAC CE and transmitted scheduling requests received up to 4 ms prior to the start of the last DCP opportunity, or occurred during the BWP switching interruption length, or occurred during the measurement gap, or if the MAC layer is monitoring a PDCCH transmission in the search space indicated by the recoverySearchSpaceId of the SpCell identified by C-RNTI while ra-ResponseWindow is active; or

[0288] 3> If ps-Wakeup is set to true and no DCP instruction associated with the current DRX cycle is received from the lower layer:

[0289] 4> You can start drx-onDurationTimer after drx-SlotOffset from the start of the subframe.

[0290] 2> If not:

[0291] 3> You can start drx-onDurationTimer for the corresponding DRX group after drx-SlotOffset from the start of the subframe.

[0292] NOTE 2:

[0293] If the SFNs between carriers within a cell group are not aligned, the SFNs of the SpCell are used for calculating the DRX interval.

[0294] 1> If the DRX group is active:

[0295] 2> PDCCH can be monitored in the serving cells of the corresponding DRX group;

[0296] 2> When PDCCH instructs a DL transfer:

[0297] 3> At the first symbol after the end of the transmission containing the DL HARQ feedback, drx-HARQ-RTT-TimerDL can be started for the corresponding HARQ process.

[0298] NOTE 3: If the PDSCH-to-HARQ_feedback timing indicates a non-numerical k1 value and the HARQ feedback is delayed, the corresponding transmission opportunity to transmit the DL HARQ feedback is indicated by the PDCCH requesting the subsequent HARQ-ACK feedback.

[0299] 3> You can stop drx-RetransmissionTimerDL for the relevant HARQ process.

[0300] 3> When PDSCH-to-HARQ_feedback timing indicates a non-numerical k1 value:

[0301] 4> For the corresponding HARQ process, drx-RetransmissionTimerDL can be started at the first symbol after the PDSCH transmission.

[0302] 2> When PDCCH directs UL transmission:

[0303] 3> At the first symbol after the end of the first iteration of the corresponding PUSCH transmission, drx-HARQ-RTT-TimerUL can be started for the corresponding HARQ process;

[0304] 3> You can stop drx-RetransmissionTimerUL for the relevant HARQ process.

[0305] 2> When PDCCH directs a new transfer (DL or UL) from a serving cell within a DRX group:

[0306] 3> At the first symbol after PDCCH reception ends, drx-InactivityTimer can be started or restarted for the corresponding DRX group.

[0307] 2> When the HARQ process receives DL feedback information and an ACK is directed:

[0308] 3> You can stop drx-RetransmissionTimerUL for the relevant HARQ process.

[0309] 1> DCP monitoring is configured for the active DL BWP;

[0310] 1> Current symbol n occurs within the duration of drx-onDurationTimer;

[0311] 1> If the drx-onDurationTimer associated with the current DRX cycle has not started as specified in this section:

[0312] 2> When evaluating all DRX active time conditions specified in this section, if the MAC layer is not in active time considering the Grant / Assignment / DRX Command MAC CE / Long DRX Command MAC CE and transmitted scheduling requests received up to 4 ms prior to symbol n:

[0313] 3> Does not transmit periodic SRS and semi-permanent SRS;

[0314] 3> Does not report semi-permanent CSI set on PUSCH;

[0315] 3> If ps-TransmitPeriodicL1-RSRP is not set to true:

[0316] 4> Does not report periodic CSI as L1-RSRP on PUCCH.

[0317] 3> If ps-TransmitOtherPeriodicCSI is not set to true:

[0318] 4> Does not report periodic CSI other than L1-RSRP on PUCCH.

[0319] 1> If not:

[0320] 2> When evaluating all DRX active time conditions specified in this section, if the DRX group is not in active time when considering the Grant / Assignment / DRX Command MAC CE / Long DRX Command MAC CE and transmitted scheduling requests received up to 4 ms prior to symbol n:

[0321] 3> The DRX group does not transmit periodic SRS and semi-permanent SRS as defined in TS 38.214 [7];

[0322] 3> The DRX group does not report CSI on PUCCH and semi-permanent CSI set on PUSCH.

[0323] 2> When CSI masking (csi-Mask) is set by the upper layer:

[0324] 3> When evaluating all DRX active time conditions specified in this section, if the DRX group's drx-onDurationTimer is not active when considering the Grant / Assignment / DRX Command MAC CE / Long DRX Command MAC CE received up to 4 ms prior to symbol n:

[0325] 4> The DRX group does not report CSI on PUCCH.

[0326] NOTE 4: If a terminal multiplexes a CSI configured on a PUCCH with another nested UCI, and the PUCCH resource on which this CSI is configured is located outside the DRX active hours of the corresponding DRX group, it is up to the terminal implementation whether to report the CSI together with the other UCI.

[0327] Regardless of whether the MAC layer is monitoring PDCCH in the serving cells of the DRX group, the MAC layer may transmit HARQ feedback, non-periodic CSI (on PUSCH), and non-periodic SRS to the serving cells of the DRX group if such transmission is expected.

[0328] Meanwhile, in conventional NR-U (Unlicensed), a method of communication between a terminal and a base station in the unlicensed band was supported. In addition, a mechanism to support communication between SL (Sidelink) terminals in the unlicensed band is scheduled to be supported in Rel-18.

[0329] For example, NR-U conventional technology may be as follows.

[0330] Channel: May refer to a set of frequency axis resources where LBT is performed. In NR-U, it refers to a 20 MHz LBT bandwidth and may have the same meaning as an RB set.

[0331] CO (Channel occupancy): May refer to time / frequency axis resources acquired by a base station or terminal after a successful LBT.

[0332] COT (Channel occupancy time): This may refer to the time-axis resources acquired by a base station or terminal after a successful LBT. Sharing is possible between the base station (or terminal) that acquired the CO and the terminal (or base station), and this operation may be referred to as COT sharing. For example, depending on the initiating device, it may be referred to as gNB-initiated COT or terminal (UE)-initiated COT.

[0333] According to one embodiment of the present disclosure, an LBT type (or channel access procedure) for DL / UL transmission is described.

[0334] 1. Type 1 (may be referred to as Cat-4 LBT): Random back-off-based channel access procedure

[0335] 1.1. Cat-4: May mean that the contention window is variable.

[0336] 2. Type 2: In the case of COT sharing, it can be performed within the COT obtained by the gNB or terminal.

[0337] 2.1. Type 2A (may be referred to as Cat-2 LBT (One-Shot LBT) or One-Shot LBT): 25 usec One-Shot LBT

[0338] 2.1.1. Transmission begins immediately after idle sensing for at least a 25 usec gap.

[0339] 2.1.2. It can be used for SSB and non-unicast DL information transmission.

[0340] 2.2. Type 2B (16 usec One-Shot LBT)

[0341] 2.2.1. Transmission begins immediately after idle sensing for at least a 16 usec gap.

[0342] 2.3. Type 2C (Cat-1 LBT (LBT is not performed) or may be referred to as No LBT.)

[0343] 2.3.1. Transmission begins immediately after a maximum 16 usec gap, and the channel is not sensed prior to transmission.

[0344] 2.3.2. The duration of the transmission is a maximum of 584 usec.

[0345] According to one embodiment of the present disclosure, a channel access priority class (CAPC) is described. For example, CAPC 1 corresponds to SRB0 / 1 / 3, and a base station may configure which CAPC corresponds to SRB2 or DRB. For example, for standardized 5QI, a CAPC is defined as shown in the table below, and for non-standardized 5QI, a CAPC that best matches the QoS characteristics may be used.

[0346] Table 9 shows the mapping relationship between CAPC and 5QI.

[0347] CAPC5QI11, 3, 5, 65, 66, 67, 69, 70, 79, 80, 82, 83, 84, 8522, 7, 7134, 6, 8, 9, 72, 73, 74, 764-NOTE: lower CAPC value means higher priority

[0348] For example, CWS (contention window size) and maximum COT value can be defined for each CAPC. For example, the formula Td = Tf + mp * Tsl may hold.

[0349] The contents of Table 10 may apply to base station-to-terminal communication (e.g., DL communication).

[0350] Channel Access Priority Class (p)m p CW min,p CW maxp T incot,p allowed CW p sizes11372 ms{3,7}217153 ms{7,15}3315638 or 10 ms{15,31,63}471510238 or 10 ms{15,31,63,127,255,511,1023}

[0351] The contents of Table 11 may apply to terminal-to-base station communication (e.g., UL communication).

[0352] Channel Access Priority Class (p)m p CW min,p CW max,p T ulmcot,p allowed CW p sizes12372 ms{3,7}227154 ms{7,15}331510236ms or 10 ms{15,31,63,127,255,511,1023}471510236ms or 10 ms{15,31,63,127,255,511,1023}

[0353] The operation of a Type 1 LBT-based NR-U is described below.

[0354] According to one embodiment of the present disclosure, if there is uplink data to be transmitted, the terminal can select a CAPC mapped to the 5QI of the data and perform an NR-U operation by applying the parameters of the CAPC. For example, the parameters may include a Min Contention Window Size, a Max Contention Window Size, mp, etc.

[0355] That is, for example, the terminal can acquire (or draw) a Backoff Counter (BC) by selecting a random value between 0 and the Min Contention Window (Min CW) mapped to CAPC. The terminal can sense a channel and, if the channel is idle, decrease the BC by 1. Subsequently, the BC becomes 0, and Td (T d =T f + m p *T slIf the channel is detected to be idling for a period of time, the terminal may occupy the channel and attempt to transmit data. If the terminal attempts to transmit data and a collision is detected, the terminal may increase the CW size mapped to CAPC and reselect BC from the range of 0 and the increased CW. For example, a terminal that successfully transmits a packet may reset the CW size to (CW min).

[0356] For example, T sl (= 9 usec): A basic sensing unit or sensing slot, which may include a measurement duration of at least 4 usec.

[0357] For example, T f (= 16 usec): The first 9 usec are T sl It can be composed of.

[0358] The operation of a Type 2 LBT-based NR-U is described below.

[0359] According to one embodiment of the present disclosure, a terminal can perform data transmission by performing Type 2 LBT (Type 2A LBT, Type 2B LBT, Type 2C LBT) within the COT.

[0360] For example, in Type 2A (Cat-2 LBT (one shot LBT) or one shot LBT: 25 usec one shot LBT, i) transmission can start immediately after idle sensing for at least 25 usec gap; ii) 25 usec one shot LBT can be used to initiate SSB and non-unicast DL information transmission; within COT, if the channel is sensed for 25 usec and the channel is idle, the terminal can occupy the channel and attempt to transmit data.

[0361] For example, in Type 2B (16 usec one-shot LBT), i) transmission can start immediately after idle sensing for a 16 usec gap; ii) that is, if the channel is sensed for 16 usec within the COT and the channel is idle, the terminal can occupy the channel and attempt to transmit data.

[0362] For example, in Type 2C (Cat-1 LBT (LBT not performed) or No LBT), i) transmission may start immediately after up to 16 usc gap and the channel may not be sensed before the transmission; ii) duration of the transmission may be at most 584 usc; iii) transmission may be attempted after 16 usec without sense and transmission may be performed for up to 584 usec.

[0363] According to one embodiment of the present disclosure, a terminal performing terminal-to-terminal communication (e.g., SL communication) in an unlicensed band may perform a channel access operation based on Listen Before Talk (LBT). Before accessing a channel in an unlicensed band, the terminal may check whether the access channel is idle (a state in which the terminal does not occupy the channel, or a state in which terminals can access the channel and transmit data) or busy (a state in which the channel is occupied and data transmission / reception operations are being performed on the channel, or a terminal attempting to access the channel cannot transmit data when the channel is busy). That is, the operation of the terminal checking whether the channel is idle or busy may be referred to as Clear Channel Assessment (CCA), and the terminal may check whether the channel is idle or busy during the CCA period.

[0364] FIG. 15 illustrates a competing operation for the channels of LBE and FBE according to one embodiment of the present disclosure. The embodiment of FIG. 15 may be combined with various embodiments of the present disclosure.

[0365] Referring to FIG. 15 (a), a dynamic channel access procedure (load-based equipment, LBE) is shown. For example, a terminal competes with other unlicensed band terminals to occupy the channel immediately as soon as the channel becomes idle, and the terminal can transmit data after occupying the channel.

[0366] Referring to FIG. 15(b), a semi-static channel access procedure (frame-based equipment, FBE) is shown. For example, a terminal competes with other unlicensed band terminals at the last point within a synchronized frame boundary (or fixed frame period), for example, for a certain time before the next FFP starts (or at the start point), and the terminal can transmit data after occupying the channel within the fixed frame period. Data transmission may need to be completed before the next FFP starts. For example, within the FFP, a Type 2 series LBT (channel sensing that does not perform random backoff-based LBT, but senses the channel for a certain short time and enables data transmission when the channel is idle) operation may be performed.

[0367] For example, in the present disclosure, LBT (listen before talk) may be interchangeable with channel sensing related to channel access procedures.

[0368] For example, in the present disclosure, the unlicensed band may be mutually substituted / substituted / included with the shared spectrum.

[0369] For example, in the present disclosure, resources of a plurality of consecutive slot transfers (e.g., MCSt) formats may be interchangeable with consecutive slot resources. For example, in the present disclosure, resources of a plurality of consecutive slot transfers (e.g., MCSt) formats (N=2) may refer to a single resource counted by assuming a set of two slots as one resource. For example, in the present disclosure, resources of consecutive slots (N=2) may refer to a single resource counted by assuming a set of two slots as one resource.

[0370] In terminal-to-terminal communication (e.g., SL communication) in a shared spectrum, a terminal may first need to occupy a channel in the unlicensed band for terminal-to-terminal communication (e.g., SL communication) in order to transmit data. To occupy a terminal-to-terminal communication channel (e.g., SL channel) in the unlicensed band (e.g., shared spectrum), the terminal may perform a process of finding an unlicensed band channel that is not occupied by another terminal by performing sensing (e.g., LBT; listen before talk) (e.g., Type 1 LBT: random backoff-based LBT) related to the channel access procedure.

[0371] A terminal performing sensing (e.g., LBT) related to the channel access procedure can occupy a channel and perform terminal-to-terminal communication (e.g., SL communication) data transmission if it discovers a channel that is not occupied by other terminals. If the terminal's sensing (e.g., LBT) process related to the channel access procedure fails (e.g., the channel is sensed to be busy as a result of sensing), the terminal can re-perform the sensing (e.g., LBT) related to the channel access procedure by adjusting parameter values ​​(e.g., adjusting the contention window size, etc.) for performing the sensing (e.g., LBT) related to the channel access procedure and continue the process of finding an unlicensed band channel that is not occupied by the terminal.

[0372] In terminal-to-terminal communication (e.g., SL communication) in a shared spectrum, a transmitting terminal performing terminal-to-terminal communication (e.g., SL communication) may perform a sensing operation (e.g., LBT) related to the channel access procedure to occupy a channel in an unlicensed band (e.g., shared spectrum). If the terminal succeeds in the sensing (e.g., LBT) related to the channel access procedure (e.g., the channel is sensed to be idle as a result of the sensing), it may be able to transmit packets on the occupied channel. If the sensing (e.g., LBT) related to the channel access procedure fails (e.g., the terminal performs sensing during the sensing slot period and the result is that the channel is busy), terminal-to-terminal transmission (e.g., SL transmission) may not be performed because the channel in the unlicensed band was not occupied.

[0373] In addition, for example, the medium access control (e.g., MAC) layer of a transmitting terminal may receive instructions from the physical layer for a failure in sensing (e.g., LBT failure) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication) (or information related thereto) when a failure in sensing (e.g., LBT failure) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication) is detected while performing a sensing (e.g., LBT failure) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication).

[0374] For example, in terminal-to-terminal communication (e.g., SL communication) in a shared spectrum, a terminal can perform an operation based on a sensing failure (e.g., LBT failure) event (or related information) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication) as follows.

[0375] According to one embodiment of the present disclosure, a terminal receives the following parameters from a base station for managing a failure of sensing (e.g., LBT failure) related to a channel connection procedure for terminal-to-terminal communication (e.g., SL communication), and based thereon, can perform a recovery of a failure of sensing (e.g., LBT failure) related to a channel connection procedure for terminal-to-terminal communication (e.g., SL communication) or a declaration of a failure of sensing (e.g., LBT failure) related to a channel connection procedure for terminal-to-terminal communication (e.g., SL communication).

[0376] - sl-lbt-FailureInstanceMaxCount: When a terminal detects a failure in sensing related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) (e.g., LBT failure), it increments SL_LBT_COUNTER by 1, and if the failure in sensing related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) (e.g., LBT failure) is detected for sl-lbt-FailureInstanceMaxCount until sl-lbt-FailureDetectionTimer expires, it can declare a failure in sensing related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) (e.g., LBT failure).

[0377] - sl-lbt-FailureDetectionTimer: A timer that starts when a failure in sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) is detected, and while the timer is running, a recovery process for the failure in sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) can be performed.

[0378] For example, when the media access control (e.g., MAC) layer of a transmitting terminal receives a sensing failure event (e.g., LBT failure) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication) from the physical layer (or information related thereto) (e.g., when the terminal detects a sensing failure (e.g., LBT failure) related to the channel access procedure of terminal-to-terminal communication (e.g., SL communication)), it may start the sl-lbt-FailureDetectionTimer timer and simultaneously increment SL_LBT_COUNTER by 1.

[0379] Additionally, for example, the terminal may perform a sensing (e.g., LBT) recovery process related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) during the operation of the sl-lbt-FailureDetectionTimer timer. For example, if the terminal detects a failure of sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) again during the operation time interval of the sl-lbt-FailureDetectionTimer timer, it may increment SL_LBT_COUNTER by 1.

[0380] If, for example, the SL_LBT_COUNTER that has been increased due to a sensing (e.g., LBT) detection related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) does not reach a threshold number (sl-lbt-FailureInstanceMaxCount) before the sl-lbt-FailureDetectionTimer timer expires, the terminal may consider the failure of the sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) to have been recovered and may continue to use the terminal-to-terminal communication resources (e.g., SL grant) currently in use to perform normal terminal-to-terminal communication (e.g., SL communication).

[0381] However, for example, if the SL_LBT_COUNTER, which is increased due to the detection of a sensing failure (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) before the sl-lbt-FailureDetectionTimer timer expires, reaches a threshold number (sl-lbt-FailureInstanceMaxCount), the terminal may consider the sensing failure (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) as unrecovered and declare a consistent sensing failure (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication).

[0382] In addition, for example, if the transmission terminal is not recovered from the failure of sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication) by the timer sl-lbt-FailureDetectionTimer expires, the transmission terminal may declare the failure of sensing (e.g., LBT failure) related to the channel connection procedure of terminal-to-terminal communication (e.g., SL communication).

[0383] According to one embodiment of the present disclosure, a resource reselection procedure operation is proposed as follows when a terminal performs a operation based on a plurality of consecutive slot transmissions (e.g., MCSt; Multiple Consecutive Slot Transmission) (terminal operation when a plurality of consecutive slot transmission (e.g., MCSt) resources are allocated).

[0384] For example, multiple consecutive slot transmissions (e.g., MCSt) may mean that terminal-to-terminal transmission resources (e.g., SL slots) having a gap less than or equal to a certain amount are allocated as transmission resources for terminal-to-terminal transmission (e.g., SL transmission), and a terminal transmits the same terminal-to-terminal transmission block (e.g., SL TB) or multiple terminal-to-terminal transmission blocks (e.g., SL TB) by using these multiple consecutive slots (Multiple Consecutive Slots).

[0385] In addition, for example, the terminal may perform sensing (e.g., LBT) related to the channel access procedure in the first slot (or, for the first slot (of a series of slot resources)), and then transmit a terminal-to-terminal transmission block (e.g., SL TB) transmitted through a series of slots (a series of slots having a gap of less than or equal to a certain level) without performing sensing (e.g., LBT) related to the channel access procedure (while).

[0386] For example, when terminal-to-terminal transmission (e.g., SL transmission) based on multiple consecutive slot transmissions (e.g., MCSt) is performed, terminal-to-terminal data (e.g., SL data) can be transmitted without performing sensing (e.g., LBT) related to channel access procedures during the gap between consecutive slots for terminal-to-terminal transmission (e.g., SL transmission), so that the overhead of the transmission operation (e.g., performing sensing (e.g., LBT) related to channel access procedures) in the unlicensed band of terminal-to-terminal communication (e.g., SL communication) can be reduced.

[0387] For example, the Media Access Control (e.g., MAC) layer of a terminal may pass n_MCSt to the physical layer to generate a grant (or, transmission resource) by selecting a plurality of consecutive slot transmission (e.g., MCSt) resources. For example, n_MCSt may represent an idle resource consisting of consecutive slots, which the Media Access Control (e.g., MAC) layer wishes to receive from the physical layer, which the Media Access Control (e.g., MAC) layer passes to the physical layer so that the physical layer can report idle candidate resources to the Media Access Control (e.g., MAC) layer. And / or, for example, n_MCSt may represent a plurality of consecutive slot transmissions (e.g., MCSt).

[0388] For example, when the physical layer receives an n_MCSt value (e.g., 1) from the Media Access Control (e.g., MAC) layer, it can create one single-slot-based idle candidate resource and report it to the Media Access Control (e.g., MAC) layer. For example, when the physical layer receives an n_MCSt value (e.g., 4) from the Media Access Control (e.g., MAC) layer, the physical layer can create idle candidate resources consisting of four consecutive slots and report them to the Media Access Control (e.g., MAC) layer. For example, one idle candidate resource consisting of the number of slots corresponding to the n_MCSt value may mean one "consecutive slot candidate resource."

[0389] According to one embodiment of the present disclosure, if the media access control (e.g., MAC) layer does not transmit an n_MCSt value to the physical layer or transmits an n_MCSt value as 1, a resource selection procedure for a plurality of consecutive slot transmissions (e.g., MCSt) may be provided as follows.

[0390] For example, when the physical layer receives an n_MCSt value (e.g., 1) from the media access control (e.g., MAC) layer, it creates single-slot based idle candidate resources and reports them to the media access control (e.g., MAC) layer, and the media access control (e.g., MAC) layer can create multiple grants (or, transmission resources) or multiple transmission blocks (e.g., TBs) based on the single-slot (candidate) resources received from the physical layer.

[0391] FIG. 16 illustrates consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure. The embodiment of FIG. 16 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0392] Referring to FIG. 16, two consecutive slot resources selected by the media access control (e.g., MAC) layer are shown. For example, the media access control (e.g., MAC) layer can generate (different) terminal-to-terminal transfer resources (e.g., SL grants) for different transfer blocks (e.g., TBs) by selecting multiple single slot resources in succession.

[0393] For example, in this embodiment, the number of slots N constituting one continuous slot resource may be 4.

[0394] FIG. 17 illustrates consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure. The embodiment of FIG. 17 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0395] Referring to FIG. 17, two consecutive slot resources selected by a media access control (e.g., MAC) layer are shown. Here, the two selected consecutive slot resources may be the same as the consecutive slot resources of FIG. 16.

[0396] For example, if a failure in sensing related to the channel access procedure (e.g., LBT failure) occurs in a resource (e.g., slot 1) for an individual transmission block (e.g., TB) among a grant (or transmission resource) for multiple transmission blocks (e.g., TBs) based on a single slot, (e.g., when a notification of a failure in sensing related to the channel access procedure (e.g., LBT failure) is received from the physical layer), the terminal may not re-select the slot 1 resource where the failure in sensing related to the channel access procedure (e.g., LBT failure) occurred in order to maintain a structure of multiple consecutive slot transmissions (e.g., MCSt). This may be because if the process of re-selecting the slot 1 resource to another resource is performed, a problem may arise in which the structure of multiple consecutive slot transmissions (e.g., MCSt) is broken by the terminal performing sensing related to the type 1 channel access procedure (e.g., LBT) again.

[0397] FIG. 18 shows consecutive slot resources selected by a media access control (e.g., MAC) layer of a terminal according to one embodiment of the present disclosure. The embodiment of FIG. 18 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0398] Referring to FIG. 18, two consecutive slot resources selected by a media access control (e.g., MAC) layer are shown. Here, the two selected consecutive slot resources may be the same as the consecutive slot resources of FIG. 16 and FIG. 17.

[0399] For example, in a grant (or transmission resource) for multiple transmission blocks (e.g., TBs) based on a single slot, if a failure of sensing related to the channel access procedure (e.g., LBT failure) occurs in all resources (e.g., slot 1, slot 2, slot 3, slot 4) for all transmission blocks (e.g., TB) of multiple consecutive slot transmissions (e.g., MCSt), when a notification of a failure of sensing related to the channel access procedure (e.g., LBT failure) is received from the physical layer, the terminal can re-select a new resource of a multiple consecutive slot transmission (e.g., MCSt) structure (e.g., a resource composed of multiple consecutive slots) by triggering resource re-selection.

[0400] For example, a plurality of consecutive slot transfer (e.g., MCSt) resources consisting of 4 consecutive slots can be selected as follows.

[0401] 1. Slot N (initial transmission of the 1st transmission block (e.g., 1st TB), Slot N+1 (initial transmission of the 2nd transmission block (e.g., 2nd TB)), Slot N+2 (initial transmission of the 3rd transmission block), Slot N+3 (initial transmission of the 4th transmission block)

[0402] 2. Slot N (initial transmission of the 1st transmission block (e.g., 1st TB), slot N+1 (retransmission of the 2nd transmission block (e.g., 2nd TB)), slot N+2 (retransmission of the 3rd transmission block), slot N+3 (retransmission of the 4th transmission block)

[0403] The embodiments of the present disclosure are merely some examples of resources selected for a plurality of consecutive slot transmissions (e.g., MCSt), and if a failure of sensing related to a channel access procedure (e.g., LBT failure) occurs for all slots of a plurality of consecutive slot transmissions (e.g., MCSt) configured based on a single slot idle resource, the terminal may re-select a plurality of consecutive slot transmission (e.g., MCSt) resources configured as initial transmission and / or retransmission resources for a plurality of various other transmission blocks (e.g., TBs) based on a single slot idle resource.

[0404] FIG. 19 illustrates another consecutive slot resource to which consecutive slot resources are reselected, according to one embodiment of the present disclosure. The embodiment of FIG. 19 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0405] Referring to FIG. 19, two consecutive slot resources selected by the media access control (e.g., MAC) layer are shown. For example, the media access control (e.g., MAC) layer can generate (different) terminal-to-terminal transfer resources (e.g., SL grants) for different transfer blocks (e.g., TBs) by selecting multiple single slot resources in succession.

[0406] For example, in this embodiment, the number of slots N constituting one continuous slot resource may be 2.

[0407] For example, even if a failure in sensing related to the channel access procedure (e.g., LBT failure) occurs in some slots of a plurality of consecutive slot transmissions (e.g., MCSt), if a failure in sensing related to the channel access procedure (e.g., LBT failure) occurs for all transmission blocks (e.g., TBs) related to the currently ongoing transmission (e.g., 1st transmission block (e.g., 1st TB) and 2nd transmission block (e.g., 2nd TB)), the terminal can reselect resources by triggering resource reselection to configure the initial transmission of the 1st transmission block (e.g., 1st TB) and the retransmission resources of the 2nd transmission block (e.g., 2nd TB) into a plurality of consecutive slot transmissions (e.g., MCSt) (e.g., slot 9 and slot 10).

[0408] For example, in the above embodiment, a case in which a failure of sensing related to the channel connection procedure (e.g., LBT failure) occurs may include a case in which a failure of sensing related to the channel connection procedure (e.g., LBT failure) occurs with respect to one of the initial transmission and retransmission, with respect to the first transmission block (e.g., first TB) and the second transmission block (e.g., second TB).

[0409] Alternatively, for example, cases in which a failure of sensing related to the channel connection procedure (e.g., LBT failure) occurs in the above embodiment may include cases in which a failure of sensing related to the channel connection procedure for the initial transmission for the first transmission block (e.g., first TB) of slot 1 (e.g., LBT failure) occurs, or a failure of sensing related to the channel connection procedure for the retransmission for the second transmission block (e.g., second TB) of slot 6 (e.g., LBT failure) occurs.

[0410] FIG. 20 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure. The embodiment of FIG. 20 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0411] Referring to FIG. 20, a resource reselection procedure can be provided as follows in the event of a failure in sensing (e.g., LBT failure) related to a channel access procedure in a multiple consecutive slot transmission (e.g., MCSt) resource based on a multiple transmission block (e.g., multi-TBs) selected based on multiple slot (or consecutive slot) candidate resources.

[0412] For example, first, multiple consecutive slot transmission (e.g., MCSt) resources (N=4) based on multiple transmission blocks (e.g., multi-TBs) can be determined (initially selected) in the following way. If n_MCSt is transmitted to the physical layer from the media access control (e.g., MAC) layer as a value greater than 1 (e.g., 2), the physical layer constructs idle candidate resources consisting of two consecutive slots and transmits them to the media access control (e.g., MAC) layer, and the media access control (e.g., MAC) layer can generate terminal-to-terminal transmission resources (e.g., SL grants) in the form of multiple consecutive slot transmission resources (e.g., MCSt resources (N=2)) (or consecutive slot resources) consisting of two consecutive slots.

[0413] Subsequently, for example, a Media Access Control (e.g., MAC) layer may combine a first terminal-to-terminal transmission resource (e.g., a first SL grant) and a second terminal-to-terminal transmission resource (e.g., a second SL grant) in the form of a plurality of consecutive slot transmission resources (e.g., MCSt resources (N=2)) (or, consecutive slot resources) composed of two consecutive slots to create a plurality of consecutive slot transmission resources (e.g., MCSt resources (N=4)) (or, consecutive slot resources) composed of four consecutive slots. In the present disclosure, for example, a Media Access Control (e.g., MAC) layer may create a selected terminal-to-terminal transmission resource (e.g., a selected SL grant) based on a resource composed of two consecutive slots and transmit a transmission block (e.g., TB) based thereon.

[0414] According to one embodiment of the present disclosure, a media access control (e.g., MAC) layer may re-select a plurality of consecutive slot transmission (e.g., MCSt) resources (N=2) (or consecutive slot resources) for the first transmission block (e.g., first TB) when a failure of sensing related to a channel access procedure (e.g., LBT failure) occurs in all slots (slot 1, slot 2) within a plurality of consecutive slot transmission (e.g., MCSt) format terminal-to-terminal transmission resources (e.g., SL grant) for the first transmission block (e.g., first TB) below.

[0415] FIG. 21 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure. The embodiment of FIG. 21 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0416] Referring to FIG. 21, the Media Access Control (e.g., MAC) layer does not reselect multiple consecutive slot transmissions (e.g., MCSt) (N=2) (or consecutive slot resources) for the first transmission block (e.g., the first TB) even if a sensing failure (e.g., LBT failure) related to the channel access procedure occurs in all slots (slot 1, slot 2) within a terminal-to-terminal transmission resource (e.g., SL grant) of a multiple consecutive slot transmission (e.g., MCSt) format for the first transmission block (e.g., the first TB) (the reselection operation is omitted (or suspended, or delayed) at the end of slot 2), and does not reselect multiple consecutive slot transmissions (e.g., MCSt) (N=2) (or consecutive slot resources) even if a sensing failure (e.g., LBT failure) related to the channel access procedure occurs in all slots (slot 1, slot 2, slot 3, and slot 4) within a terminal-to-terminal transmission resource (e.g., SL grant) of a multiple consecutive slot transmission (e.g., MCSt) format for the second transmission block (e.g., the second TB). Only when a failure occurs can the first terminal-to-terminal transmission resource (e.g., first SL grant) and the second terminal-to-terminal transmission resource (e.g., second SL grant) of a plurality of consecutive slot transmission (e.g., MCSt) formats (N=2) for the first transmission block (e.g., first TB) and the second transmission block (e.g., second TB) be re-selected.

[0417] Here, for example, a third terminal-to-terminal transmission resource (e.g., third SL grant) and a fourth terminal-to-terminal transmission resource (e.g., fourth SL grant) of a plurality of consecutive slot transmission (e.g., MCSt) formats (N=2) that are re-selected (to which) for a first transmission block (e.g., first TB) and a second transmission block (e.g., second TB) may be consecutive. For example, before and after the re-selection operation, the consecutive slot resources for the first transmission block (e.g., first TB) and the consecutive slot resources for the second transmission block (e.g., second TB) may all be consecutive.

[0418] FIG. 22 illustrates a reselection operation performed based on sensing (e.g., LBT) related to a channel access procedure when a plurality of consecutive slot resources are selected, according to one embodiment of the present disclosure. The embodiment of FIG. 22 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0419] Referring to FIG. 22, the Media Access Control (e.g., MAC) layer does not reselect multiple consecutive slot transmissions (e.g., MCSt) (N=2) (or consecutive slot resources) for the first transmission block (e.g., the first TB) even if a sensing failure (e.g., LBT failure) related to the channel access procedure occurs in all slots (slot 1, slot 2) within a terminal-to-terminal transmission resource (e.g., SL grant) of a multiple consecutive slot transmission (e.g., MCSt) format for the first transmission block (e.g., the first TB) (the reselection operation is omitted (or suspended, or delayed) at the end of slot 2), and does not reselect multiple consecutive slot transmissions (e.g., MCSt) (N=2) (or consecutive slot resources) even if a sensing failure (e.g., LBT failure) related to the channel access procedure occurs in all slots (slot 1, slot 2, slot 3, and slot 4) within a terminal-to-terminal transmission resource (e.g., SL grant) of a multiple consecutive slot transmission (e.g., MCSt) format for the second transmission block (e.g., the second TB). Only when a failure occurs can the first terminal-to-terminal transmission resource (e.g., first SL grant) and the second terminal-to-terminal transmission resource (e.g., second SL grant) of a plurality of consecutive slot transmission (e.g., MCSt) formats (N=2) for the first transmission block (e.g., first TB) and the second transmission block (e.g., second TB) be re-selected.

[0420] Here, for example, the third terminal-to-terminal transmission resource (e.g., third SL grant) and the fourth terminal-to-terminal transmission resource (e.g., fourth SL grant) of a plurality of consecutive slot transmission (e.g., MCSt) formats (N=2) that are re-selected (to which) for the first transmission block (e.g., first TB) and the second transmission block (e.g., second TB) may not be consecutive. For example, even if the consecutive slot resource for the first transmission block (e.g., first TB) and the consecutive slot resource for the second transmission block (e.g., second TB) are consecutive before the re-selection operation, the consecutive slot resource for the first transmission block (e.g., first TB) and the consecutive slot resource for the second transmission block (e.g., second TB) after the re-selection operation may not be consecutive.

[0421] The channel mentioned in the present disclosure may be applied interchangeably with a carrier, a set of resource blocks of a specific carrier (e.g., RB set), or a band.

[0422] Whether the proposed method / rule of the present disclosure applies and / or related parameters (e.g., threshold value) may be specifically (or differently or independently) set according to a specific terminal-to-terminal communication channel access priority class (e.g., SL CAPC), a sensing (e.g., LBT) type associated with the terminal-to-terminal communication (e.g., SL communication)-channel access procedure (e.g., Type 1 LBT, Type 2A LBT, Type 2B LBT, Type 2C LBT), whether Frame Based LBT (FBE) is applied, whether Load Based LBT (LBE) is applied, etc.

[0423] For example, whether the proposed method / rule of the present disclosure applies and / or related parameters (e.g., threshold values) may be specifically (or differently, or independently) configured according to resource pools (e.g., resource pools with a terminal-to-terminal physical feedback channel (e.g., PSFCH) configured, resource pools without a terminal-to-terminal physical feedback channel (e.g., PSFCH) configured), congestion, service priority (and / or type), QoS requirements (e.g., latency, reliability) or PQI, traffic type (e.g., (non)periodic generation), terminal-to-terminal transmission (e.g., SL transmission) resource allocation mode (mode 1, mode 2), Tx profiles (e.g., Tx profiles indicating that the service supports terminal-to-terminal discontinuous reception (e.g., SL DRX) operation, Tx profiles indicating that the service does not support terminal-to-terminal discontinuous reception (e.g., SL DRX) operation), etc.

[0424] For example, whether the proposed rules of this disclosure apply (and / or related parameter setting values) depends on whether terminal-to-base station physical control channel (e.g., PUCCH) configuration is supported (e.g., when a terminal-to-base station physical control channel (e.g., PUCCH) resource is configured or when a terminal-to-base station physical control channel (e.g., PUCCH) resource is not configured), resource pool (e.g., resource pool with terminal-to-terminal physical feedback channel (e.g., PSFCH) configured, resource pool without terminal-to-terminal physical feedback channel (e.g., PSFCH) configured), service / packet type (and / or priority), QoS profile or QoS requirements (e.g., URLLC / EMBB traffic, reliability, latency), PQI, PFI, cast type (e.g., unicast, groupcast, broadcast), (resource pool) congestion level (e.g., CBR), terminal-to-terminal feedback (e.g., SL HARQ feedback) method (e.g., NACK Only feedback, ACK / NACK feedback), and feedback (e.g., HARQ For the transmission of an enabled Media Access Control (e.g., MAC) protocol data unit (e.g., PDU) (and / or disabled HARQ feedback), terminal-to-base station physical control channel (e.g., PUCCH)-based terminal-to-base station feedback (e.g., SL feedback (e.g.), HARQ feedback)) whether reporting behavior is configured, in the case of pre-emption (and / or re-evaluation) (non)execution (or resource reselection based on), (L2 or L1) source and / or destination identifier, (L2 or L1) identifier (combination of source layer ID and destination layer ID), (L2 or L1) identifier (combination of source layer ID and destination layer ID pair and cast type), direction of the source layer ID and destination layer ID pair, PC5 RRC connection / link, in the case of terminal-to-terminal discontinuous reception (e.g., SL DRX) execution, SL mode type (Resource Allocation Mode 1, Resource Allocation Mode 2) execution, (non)periodic resource reservation execution, Tx profile (e.g., Tx profile indicating that the service supports terminal-to-terminal discontinuous reception (e.g., SL DRX) operation, terminal-to-terminal discontinuous reception (e.g., SL At least one of the Tx profiles indicating that the service does not need to support DRX operation may be specifically (and / or independently and / or differently) configured.

[0425] In addition, for example, the proposal and proposal rule of the present disclosure (and / or related parameter setting values) may also be applied to mmWave terminal-to-terminal communication (e.g., SL communication) operations.

[0426] In a shared spectrum (e.g., unlicensed band), channel sensing related to channel access procedures may be performed to secure transmission opportunities. The channel sensing may be performed from a point in time prior to the transmission resource's point in time by a channel sensing slot duration to the transmission resource's point in time, and transmission on the transmission resource may be performed only if the result is idle (e.g., when the channel is sensed to be idle).

[0427] For example, the channel sensing operation described above may be omitted when the interval between two transmission resources is 16 usec (or 25 usec) or less and the channel sensing result for the earlier of the two transmission resources is idle, and in this case, transmission based on the later of the two resources may be performed without performing channel sensing. For example, if the performance of channel sensing is omitted as described above, power consumed for channel sensing can be saved, and the effect of securing transmission opportunities in the unlicensed band, where transmission attempts are difficult compared to the licensed band, may occur. For example, multiple consecutive slot transmissions (e.g., MCSt) may be an operation that enables transmission to be performed based on resources composed of consecutive slots (multiple consecutive slots) so as to produce the above effect.

[0428] According to one embodiment of the present disclosure, a resource selection procedure for a plurality of consecutive slot transmissions (eg, MCSt) may be provided when a media access control (eg, MAC) layer does not transmit a value of the number of slots (eg, n_MCSt) of a plurality of consecutive slot transmissions (eg, MCSt) to the physical layer, or transmits a value of the number of slots (eg, n_MCSt) of a plurality of consecutive slot transmissions (eg, MCSt) as 1.

[0429] According to one embodiment of the present disclosure, a method for performing a plurality of consecutive slot transmissions (e.g., MCSt) for a plurality of transmission blocks (e.g., TB) based on consecutive slot candidate resources may be provided. For example, the above case may include a case in which the number of slots (e.g., n_MCSt) of a plurality of consecutive slot transmissions (e.g., MCSt) is transmitted to the physical layer as a value greater than 1 (e.g., 2) at the media access control (e.g., MAC) layer.

[0430] According to one embodiment of the present disclosure, when a plurality of consecutive slot resources selected for a plurality of consecutive slot transmission (e.g., MCSt) operation for a single transmission block (e.g., TB) are selected to be consecutive (e.g., when two consecutive slot resources selected for different transmission blocks (e.g., TB1, TB2) are selected to be consecutive, or, for example, when two consecutive slot resources selected for different transmission blocks (e.g., TB1, TB2) are selected to be consecutive), a resource reselection operation may be performed only when all transmissions based on consecutive slot resources fail (e.g., LBT failure).

[0431] According to various embodiments of the present disclosure, power consumed for channel sensing can be saved by a plurality of consecutive slot transmission (e.g., MCSt) operations, and the effect of securing transmission opportunities in unlicensed bands, where transmission attempts are difficult compared to licensed bands, can be achieved. In addition, by allowing resource reselection operations to be performed relatively limitedly, power can be saved and the complexity of terminal implementation can be reduced.

[0432] FIG. 23 illustrates a procedure of a method that can be performed by a first device according to one embodiment of the present disclosure. The embodiment of FIG. 23 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0433] Referring to FIG. 23, at step S2310, the first device may select a first consecutive slot resource for the transmission of a first transmission block. At step S2320, the first device may select a second consecutive slot resource for the transmission of a second transmission block. At step S2330, the first device may omit the first resource re-selection for the first consecutive slot resource based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive. In step S2340, the first device may perform a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

[0434] For example, the channel of the first consecutive slot resource and the channel of the second consecutive slot resource may be the same.

[0435] For example, the plurality of first sensing slots may be terminated at the start of each of the plurality of first slots.

[0436] For example, the plurality of second sensing slots may be terminated at the start of each of the plurality of second slots.

[0437] For example, the second resource reselection may include a third resource reselection for the first consecutive slot resource and a fourth resource reselection for the second consecutive slot resource.

[0438] For example, based on the second resource reselection above, both the first consecutive slot resource and the second consecutive slot resource may be reselected.

[0439] For example, the third consecutive slot resource to which the first consecutive slot resource is re-selected and the fourth consecutive slot resource to which the second consecutive slot resource is re-selected may be consecutive.

[0440] For example, the first consecutive slot resource can be selected from a set of consecutive slot candidate resources.

[0441] For example, the number of the plurality of first slots and the number of the plurality of second slots may be the same.

[0442] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, sensing related to a channel connection procedure can be performed for the second sensing slot following the first sensing slot among the plurality of first sensing slots.

[0443] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, the channel associated with the first sensing slot can be sensed as busy.

[0444] For example, the first consecutive slot resource and the second consecutive slot resource may be included in a shared spectrum.

[0445] The above-described embodiment may be applied to various devices described below. First, the processor (102) of the first device (100) may select a first consecutive slot resource for the transmission of a first transmission block. Then, the processor (102) of the first device (100) may select a second consecutive slot resource for the transmission of a second transmission block. Furthermore, the processor (102) of the first device (100) may omit the first resource re-selection for the first consecutive slot resource based on the fact that the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive. And, the processor (102) of the first device (100) can perform a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

[0446] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and, based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, omit a first resource reselection for the first consecutive slot resource; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0447] For example, the channel of the first consecutive slot resource and the channel of the second consecutive slot resource may be the same.

[0448] For example, the plurality of first sensing slots may be terminated at the start of each of the plurality of first slots.

[0449] For example, the plurality of second sensing slots may be terminated at the start of each of the plurality of second slots.

[0450] For example, the second resource reselection may include a third resource reselection for the first consecutive slot resource and a fourth resource reselection for the second consecutive slot resource.

[0451] For example, based on the second resource reselection above, both the first consecutive slot resource and the second consecutive slot resource may be reselected.

[0452] For example, the third consecutive slot resource to which the first consecutive slot resource is re-selected and the fourth consecutive slot resource to which the second consecutive slot resource is re-selected may be consecutive.

[0453] For example, the first consecutive slot resource can be selected from a set of consecutive slot candidate resources.

[0454] For example, the number of the plurality of first slots and the number of the plurality of second slots may be the same.

[0455] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, sensing related to a channel connection procedure can be performed for the second sensing slot following the first sensing slot among the plurality of first sensing slots.

[0456] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, the channel associated with the first sensing slot can be sensed as busy.

[0457] For example, the first consecutive slot resource and the second consecutive slot resource may be included in a shared spectrum.

[0458] According to one embodiment of the present disclosure, a processing device configured to control a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and, based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, omit a first resource reselection for the first consecutive slot resource; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0459] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, when the instructions are executed, the first device may: select a first consecutive slot resource for the transmission of a first transmission block; select a second consecutive slot resource for the transmission of a second transmission block; and omit a first resource reselection for the first consecutive slot resource based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive; And based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots, a second resource reselection for the first consecutive slot resource and the second consecutive slot resource can be performed.

[0460] FIG. 24 illustrates a procedure of a method that can be performed by a second device according to one embodiment of the present disclosure. The embodiment of FIG. 24 may be combined with various embodiments of the present disclosure, and the description, function, procedure, proposal, method, and / or operation of said embodiment may be omitted.

[0461] Referring to FIG. 24, in step S2410, the second device may receive a first transmission block based on a third consecutive slot resource from the first device. In step S2420, the second device may receive a second transmission block based on a fourth consecutive slot resource from the first device. For example, the third consecutive slot resource and the fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on the second resource re-selection, and the first resource re-selection for the first consecutive slot resource is omitted based on the fact that the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and the first consecutive slot resource and the second consecutive slot resource are consecutive, and the second resource re-selection can be performed based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

[0462] For example, the channel of the first consecutive slot resource and the channel of the second consecutive slot resource may be the same.

[0463] For example, the channel of the third consecutive slot resource and the channel of the fourth consecutive slot resource may be the same.

[0464] For example, the plurality of first sensing slots may be terminated at the start of each of the plurality of first slots.

[0465] For example, the plurality of second sensing slots may be terminated at the start of each of the plurality of second slots.

[0466] For example, the second resource reselection may include a third resource reselection for the first consecutive slot resource and a fourth resource reselection for the second consecutive slot resource.

[0467] For example, based on the second resource reselection above, both the first consecutive slot resource and the second consecutive slot resource may be reselected.

[0468] For example, the first consecutive slot resource can be selected from a set of consecutive slot candidate resources.

[0469] For example, the number of the plurality of first slots and the number of the plurality of second slots may be the same.

[0470] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, sensing related to a channel connection procedure can be performed for the second sensing slot following the first sensing slot among the plurality of first sensing slots.

[0471] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, the channel associated with the first sensing slot can be sensed as busy.

[0472] For example, the first consecutive slot resource and the second consecutive slot resource may be included in a shared spectrum.

[0473] For example, the first transmission block may be transmitted by the first device based on the third channel associated with the third consecutive slot resource being sensed to be idle, and the second transmission block may be transmitted by the first device based on the fourth channel associated with the fourth consecutive slot resource being sensed to be idle.

[0474] The above-described embodiment may be applied to various devices described below. First, the processor (202) of the second device (200) may control the transceiver (206) to receive a first transmission block based on a third consecutive slot resource from the first device (100). Then, the processor (202) of the second device (200) may control the transceiver (206) to receive a second transmission block based on a fourth consecutive slot resource from the first device (100). For example, the third consecutive slot resource and the fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device (100) based on the second resource re-selection, and the first resource re-selection for the first consecutive slot resource is omitted based on the fact that the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and the first consecutive slot resource and the second consecutive slot resource are consecutive, and the second resource re-selection can be performed based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

[0475] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on the instructions being executed by the at least one processor, the second device may: receive a first transmission block based on a third consecutive slot resource from the first device; and receive a second transmission block based on a fourth consecutive slot resource from the first device, wherein the third consecutive slot resource and the fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on a second resource re-selection, and the first resource re-selection for the first consecutive slot resource is omitted based on the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource being all busy sensing slots, and the first consecutive slot resource and the second consecutive slot resource being consecutive, and the second resource re-selection can be performed based on the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots being all busy sensing slots.

[0476] For example, the channel of the first consecutive slot resource and the channel of the second consecutive slot resource may be the same.

[0477] For example, the channel of the third consecutive slot resource and the channel of the fourth consecutive slot resource may be the same.

[0478] For example, the plurality of first sensing slots may be terminated at the start of each of the plurality of first slots.

[0479] For example, the plurality of second sensing slots may be terminated at the start of each of the plurality of second slots.

[0480] For example, the second resource reselection may include a third resource reselection for the first consecutive slot resource and a fourth resource reselection for the second consecutive slot resource.

[0481] For example, based on the second resource reselection above, both the first consecutive slot resource and the second consecutive slot resource may be reselected.

[0482] For example, the first consecutive slot resource can be selected from a set of consecutive slot candidate resources.

[0483] For example, the number of the plurality of first slots and the number of the plurality of second slots may be the same.

[0484] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, sensing related to a channel connection procedure can be performed for the second sensing slot following the first sensing slot among the plurality of first sensing slots.

[0485] For example, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot, the channel associated with the first sensing slot can be sensed as busy.

[0486] For example, the first consecutive slot resource and the second consecutive slot resource may be included in a shared spectrum.

[0487] For example, the first transmission block may be transmitted by the first device based on the third channel associated with the third consecutive slot resource being sensed to be idle, and the second transmission block may be transmitted by the first device based on the fourth channel associated with the fourth consecutive slot resource being sensed to be idle.

[0488] Various embodiments of the present disclosure may be combined with one another.

[0489] The following describes an apparatus to which various embodiments of the present disclosure may be applied.

[0490] Although not limited to this, the various descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0491] Examples are provided in more detail below with reference to the drawings. In the following drawings and descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or function blocks unless otherwise described.

[0492] FIG. 25 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 25 can be combined with various embodiments of the present disclosure.

[0493] Referring to FIG. 25, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with wireless communication functions, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices and can be implemented in the form of HMDs (Head-Mounted Devices), HUDs (Head-Up Displays) equipped in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Portable devices may include smartphones, smartpads, wearable devices (e.g., smartwatches, smart glasses), computers (e.g., laptops, etc.). Home appliances may include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, base stations and networks may be implemented as wireless devices, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0494] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0495] Wireless devices (100a to 100f) can be connected to a network (300) through a base station (200). Artificial Intelligence (AI) technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) through the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other through the base station (200) / network (300), but they may also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0496] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base station (200) and base station (200) / base station (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR), such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and inter-base station communication (150c) (e.g., relay, IAB (Integrated Access Backhaul)). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various proposals of the present disclosure, at least some of the following may be performed: various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0497] FIG. 26 shows a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 26 can be combined with various embodiments of the present disclosure.

[0498] Referring to FIG. 26, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} may correspond to {wireless device (100x), base station (200)} and / or {wireless device (100x), wireless device (100x)} of FIG. 25.

[0499] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0500] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0501] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0502] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0503] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0504] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through one or more antennas (108, 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, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0505] FIG. 27 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure. The embodiment of FIG. 27 can be combined with various embodiments of the present disclosure.

[0506] Referring to FIG. 27, 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). Although not limited thereto, the operation / function of FIG. 27 may be performed in the processor (102, 202) and / or transceiver (106, 206) of FIG. 26. The hardware elements of FIG. 27 may be implemented in the processor (102, 202) and / or transceiver (106, 206) of FIG. 26. For example, blocks 1010 through 1060 may be implemented in the processor (102, 202) of FIG. 26. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 26, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 26.

[0507] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 27. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transmission block (e.g., UL-SCH transmission block, DL-SCH transmission block). The wireless signal can be transmitted through various physical channels (e.g., PUSCH, PDSCH).

[0508] Specifically, a codeword can be converted into a scrambled bit sequence by a scrambler (1010). The scrambled sequence used for scrambling is generated based on an initialization value, which may include ID information of a wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by an N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on the complex modulation symbols. Additionally, the precoder (1040) can perform precoding without performing transform precoding.

[0509] A resource mapper (1050) can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. A signal generator (1060) generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to another device 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), a frequency uplink converter, etc.

[0510] The signal processing process for a received signal in a wireless device can be configured as the inverse of the signal processing process (1010–1060) of FIG. 27. For example, a wireless device (e.g., 100, 200 in FIG. 26) can receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal can be converted into a baseband signal through 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. Subsequently, the baseband signal can be restored into a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scrambling process. The codeword can be restored into the original information block through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0511] FIG. 28 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 25). The embodiment of FIG. 28 may be combined with various embodiments of the present disclosure.

[0512] Referring to FIG. 28, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 26 and may be composed of various elements, components, units / parts, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 26. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 26. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and additional elements (140) and controls the general operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (130). Additionally, the control unit (120) may transmit information stored in the memory unit (130) to an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110) in the memory unit (130).

[0513] The additional element (140) can be configured in various ways depending on the type of wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 25, 100a), a vehicle (Fig. 25, 100b-1, 100b-2), an XR device (Fig. 25, 100c), a portable device (Fig. 25, 100d), a home appliance (Fig. 25, 100e), an IoT device (Fig. 25, 100f), a digital broadcasting terminal, a hologram 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 (Fig. 25, 400), a base station (Fig. 25, 200), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0514] In FIG. 28, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least partially connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be connected via a wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly via the communication unit (110). Additionally, each element, component, unit / part, and / or module within the wireless device (100, 200) may include one or more additional elements. For example, the control unit (120) may be composed of one or more sets of processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an Electronic Control Unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory and / or a combination thereof.

[0515] Hereinafter, an implementation example of FIG. 28 will be described in more detail with reference to the drawings.

[0516] FIG. 29 illustrates a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a portable computer (e.g., a laptop, etc.). The portable device may be referred to as an MS (Mobile Station), UT (User Terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless Terminal). The embodiment of FIG. 29 may be combined with various embodiments of the present disclosure.

[0517] Referring to FIG. 29, the portable device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an input / output unit (140c). The antenna unit (108) may be configured as part of the communication unit (110). Blocks 110 to 130 / 140a to 140c each correspond to blocks 110 to 130 / 140 of FIG. 28.

[0518] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control the components of the portable device (100) to perform various operations. The control unit (120) may include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / code / commands required for the operation of the portable device (100). Additionally, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the portable device (100) and may include wired / wireless charging circuits, batteries, etc. The interface unit (140b) can support the connection between the portable device (100) and other external devices. The interface unit (140b) may include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can receive or output video information / signals, audio information / signals, data, and / or information input by a user. The input / output unit (140c) may include a camera, a microphone, a user input unit, a display unit (140d), a speaker and / or a haptic module, etc.

[0519] For example, in the case of data communication, the input / output unit (140c) acquires information / signals (e.g., touch, text, voice, image, video) input from the user, and the acquired information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals and can directly transmit the converted wireless signals to another wireless device or to a base station. Additionally, the communication unit (110) can receive wireless signals from another wireless device or base station and then restore the received wireless signals to their original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

[0520] FIG. 30 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, etc. The embodiment of FIG. 30 may be combined with various embodiments of the present disclosure.

[0521] Referring to FIG. 30, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as part of the communication unit (110). Blocks 110 / 130 / 140a to 140d each correspond to blocks 110 / 130 / 140 of FIG. 28.

[0522] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, roadside base stations (Roadside units), etc.), and servers. The control unit (120) can perform various operations by controlling elements of the vehicle or autonomous vehicle (100). The control unit (120) may include an Electronic Control Unit (ECU). The driving unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The driving unit (140a) may include an engine, motor, power train, wheels, brakes, steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and may include wired / wireless charging circuits, batteries, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement technologies such as maintaining the driving lane, technologies for automatically adjusting speed such as adaptive cruise control, technologies for automatically driving along a predetermined path, and technologies for automatically setting a path and driving when a destination is set.

[0523] 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 based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or the autonomous vehicle (100) moves 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 and can acquire surrounding traffic information data from surrounding vehicles. Additionally, during autonomous driving, the sensor unit (140c) can acquire vehicle status and 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 regarding the vehicle location, autonomous driving path, driving plan, etc. to an external server. An external server can predict traffic information data in advance using AI technology, etc., based on information collected from vehicles or autonomous vehicles, and can provide the predicted traffic information data to vehicles or autonomous vehicles.

[0524] The claims described in this specification may be combined in various ways. For example, the technical features of the method claims in this specification may be combined to be implemented as a device, and the technical features of the device claims in this specification may be combined to be implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a device, and the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a method.

Claims

1. Regarding the method, A step of selecting a first consecutive slot resource for the transmission of a first transmission block; A step of selecting a second consecutive slot resource for the transmission of a second transmission block; A step of omitting a first resource re-selection for the first consecutive slot resource based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive; and A method comprising the step of performing a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

2. In Paragraph 1, The above-mentioned first consecutive slot resource channel and the above-mentioned second consecutive slot resource channel are the same, method.

3. In Paragraph 1, A method in which the plurality of first sensing slots are terminated at the start time of each of the plurality of first slots.

4. In Paragraph 1, A method in which the plurality of second sensing slots are terminated at the start time of each of the plurality of second slots.

5. In Paragraph 1, A method wherein the second resource reselection comprises a third resource reselection for the first consecutive slot resource and a fourth resource reselection for the second consecutive slot resource.

6. In Paragraph 1, A method in which both the first consecutive slot resource and the second consecutive slot resource are re-selected based on the second resource re-selection.

7. In Paragraph 1, The third consecutive slot resource to which the first consecutive slot resource is reselected and the fourth consecutive slot resource to which the second consecutive slot resource is reselected are consecutive, method.

8. In Paragraph 1, A method in which the first consecutive slot resource is selected from a set of consecutive slot candidate resources.

9. In Paragraph 1, A method in which the number of the plurality of first slots and the number of the plurality of second slots are the same.

10. In Paragraph 1, A method in which sensing related to a channel connection procedure is performed for a second sensing slot following the first sensing slot among the plurality of first sensing slots, based on the fact that the first sensing slot included in the plurality of first sensing slots is a busy sensing slot.

11. In Paragraph 1, A method in which, based on the fact that a first sensing slot included in the plurality of first sensing slots is a busy sensing slot, a channel associated with the first sensing slot is sensed as busy.

12. In Paragraph 1, A method in which the first consecutive slot resource and the second consecutive slot resource are included in a shared spectrum.

13. In Paragraph 1, The above method is a method performed by a first device.

14. In the first device, At least one transmitter / receiver; At least one processor; and It includes at least one memory connected to the above-mentioned at least one processor and storing instructions, Based on the execution of the above instructions by the at least one processor, the first device: Selecting a first consecutive slot resource for the transmission of a first transmission block; Selecting a second consecutive slot resource for the transmission of the second transmission block; Based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, the first resource reselection for the first consecutive slot resource is omitted; and A first device that enables a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that a plurality of second sensing slots associated with a plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

15. In a processing device configured to control a first device, At least one processor; and It includes at least one memory connected to the above-mentioned at least one processor and storing instructions, Based on the execution of the above instructions by the at least one processor, the first device: Selecting a first consecutive slot resource for the transmission of a first transmission block; Selecting a second consecutive slot resource for the transmission of the second transmission block; Based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, the first resource reselection for the first consecutive slot resource is omitted; and A processing device that performs a second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

16. As a non-transient computer-readable storage medium recording instructions, When executed, the above commands cause the first device: Selecting a first consecutive slot resource for the transmission of a first transmission block; Selecting a second consecutive slot resource for the transmission of the second transmission block; Based on the fact that a plurality of first sensing slots associated with a plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, the first resource reselection for the first consecutive slot resource is omitted; and A non-transient computer-readable storage medium that enables second resource reselection for the first consecutive slot resource and the second consecutive slot resource based on the fact that the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

17. Regarding the method, A step of receiving a first transmission block based on a third consecutive slot resource from a first device; and The method includes the step of receiving a second transmission block based on a fourth consecutive slot resource from the first device, wherein The above third consecutive slot resource and the above fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on the second resource re-selection, and The first resource reselection for the first consecutive slot resource is omitted based on the fact that the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, and A method in which the second resource reselection is performed based on the plurality of second sensing slots associated with the plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots being busy sensing slots.

18. In Paragraph 17, The above third consecutive slot resource and the above fourth consecutive slot resource are continuous, method.

19. In the second device, At least one transmitter / receiver; At least one processor; and It includes at least one memory connected to the above-mentioned at least one processor and storing instructions, Based on the above instructions being executed by the at least one processor, the second device: Receiving a first transmission block based on a third consecutive slot resource from a first device; and To receive a second transmission block based on a fourth consecutive slot resource from the first device, The above third consecutive slot resource and the above fourth consecutive slot resource are resources to which the first consecutive slot resource and the second consecutive slot resource are respectively re-selected by the first device based on the second resource re-selection, and The first resource reselection for the first consecutive slot resource is omitted based on the fact that the plurality of first sensing slots associated with the plurality of first slots included in the first consecutive slot resource are all busy sensing slots, and that the first consecutive slot resource and the second consecutive slot resource are consecutive, and A second device, wherein the second resource reselection is performed based on the plurality of second sensing slots associated with a plurality of second slots included in the second consecutive slot resource and the plurality of first sensing slots are all busy sensing slots.

20. In Paragraph 19, The above third consecutive slot resource and the above fourth consecutive slot resource are consecutive, second device.

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