Method and apparatus for transmitting nr sidelink in consideration of occupied channel bandwidth requirements in unlicensed band

Abstract

An operation method of a first device (100) in a wireless communication system is presented. The method may comprise the steps of: acquiring information related to a resource block (RB) set, the RB set comprising a physical sidelink feedback channel (PSFCH) resource, and the PSFCH resource comprising at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and transmitting hybrid automatic repeat request (HARQ) feedback information based on the at least one dedicated PRB on the basis of the at least one dedicated PRB and the at least one common PRB being included in the bandwidth of 1 MHz.

Description

Technical Field

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

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

[0003] At the same time, as a wider range of communication devices require greater communication capacity, the demand for mobile broadband communications that are more enhanced than existing radio access technologies (RATs) is rising. Therefore, services and user equipment (UE) that are sensitive to reliability and latency are discussed. And, the next generation of radio access technologies based on enhanced mobile broadband communications, massive machine type communications (MTC), ultra-reliable low latency communications (URLLC), etc. can be called new radio access technologies (RATs) or new radios (NRs). Summary of the invention

[0004] According to an embodiment of the present disclosure, a method for performing wireless communication by a first device may be proposed. For example, the method may include: obtaining information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, transmitting hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB.

[0005] According to an embodiment of the present disclosure, a first device for performing wireless communication may be proposed. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation may include: obtaining information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is sent based on at least one dedicated PRB.

[0006] According to an embodiment of the present disclosure, a device adapted to control a first user equipment (UE) may be proposed. For example, the device may include: at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the first UE to perform operations based on being executed by the at least one processor. For example, the operation may include: obtaining information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and sending hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB, based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz.

[0007] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be proposed. For example, the instructions may enable a first device to: obtain information related to a resource block (RB) set based on being executed, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, send hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB.

[0008] According to an embodiment of the present disclosure, a method for performing wireless communication by a second device may be proposed. For example, the method may include: receiving hybrid automatic repeat request (HARQ) feedback information from a first device based on at least one dedicated physical resource block (PRB), wherein the at least one dedicated PRB and at least one common PRB may be included in a bandwidth of 1 MHz, the HARQ feedback information may be sent based on at least one PRB from the first device, and wherein the at least one dedicated PRB and the at least one common PRB may be included in a physical sidelink feedback channel (PSFCH) resource.

[0009] According to an embodiment of the present disclosure, a second device for performing wireless communication may be proposed. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation may include: receiving hybrid automatic repeat request (HARQ) feedback information from a first device based on at least one dedicated physical resource block (PRB), wherein the HARQ feedback information may be sent based on at least one PRB from the first device based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, and wherein the at least one dedicated PRB and the at least one common PRB may be included in a physical sidelink feedback channel (PSFCH) resource. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 The electromagnetic spectrum is shown according to one embodiment of the present disclosure.

[0012] Figure 3 The structure of the NR system based on the embodiment of the present disclosure is shown.

[0013] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0014] Figure 5 The structure of a radio frame of NR according to an embodiment of the present disclosure is shown.

[0015] Figure 6 The structure of the time slot of the NR frame based on the embodiment of the present disclosure is shown.

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

[0017] Figure 8A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown.

[0018] Fig. 9 Three broadcasts based on embodiments of the present disclosure are shown.

[0019] Fig.10 An example of a wireless communication system supporting an unlicensed band according to an embodiment of the present disclosure is shown.

[0020] Fig.11 A method of occupying resources in an unlicensed band according to an embodiment of the present disclosure is shown.

[0021] Fig.12 A case where a plurality of LBT-SBs are included in an unlicensed band according to an embodiment of the present disclosure is shown.

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

[0023] Fig.14 A Type 1 CAP operation for transmitting an uplink signal performed by a UE according to an embodiment of the present disclosure is illustrated.

[0024] Fig.15 A common PRB used to meet the PSD requirement according to one embodiment of the present disclosure is shown.

[0025] Fig.16 A common PRB used to meet the PSD requirement according to one embodiment of the present disclosure is shown.

[0026] Fig.17 A process for a first device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0027] Fig.18 A process for a second device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0028] Fig.19 A communication system 1 according to an embodiment of the present disclosure is shown.

[0029] Fig. 20 A wireless device according to an embodiment of the present disclosure is shown.

[0030] Fig.21 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0031] Fig. 22 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0032] Fig.23 A handheld device according to an embodiment of the present disclosure is shown.

[0033] Fig.24 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0034] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

[0035] A slash ( / ) or a comma used in the present disclosure may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0036] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present disclosure, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0037] In addition, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "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".

[0038] In addition, brackets used in the present disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean proposing "PDCCH" as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDCCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean proposing "PDCCH" as an example of "control information".

[0039] In the following description, "when, if or in the case of" can be replaced by "based on".

[0040] The technical features described separately in one drawing in the present disclosure may be implemented separately or simultaneously.

[0041] In the present disclosure, the higher layer parameter may be a parameter configured, preconfigured or predefined for the UE. For example, the base station or the network may send the higher layer parameter to the UE. For example, the higher layer parameter may be sent via radio resource control (RRC) signaling or media access control (MAC) signaling.

[0042] The techniques described below may be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA may be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for systems based on IEEE 802.16e. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0043] 5G NR is a subsequent technology of LTE-A corresponding to a new mobile communication system with high performance, low latency, high availability, etc. 5G NR can use all available spectrum resources including low frequency bands less than 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) above 24 GHz.

[0044] The goals of 6G (wireless communication) systems are (i) very high data rates per device, (ii) very large numbers of connected devices, (iii) global connectivity, (iv) very low latency, (v) lower energy consumption for battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) interconnected intelligence with machine learning capabilities. The vision of 6G systems can be four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and 6G systems can meet the requirements shown in Table 1 below. In other words, Table 1 is an example of the requirements of 6G systems.

[0045] [Table 1]

[0046]

[0047] The 6G system may have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low-latency communications), mMTC (massive machine-type communications), AI-converged communications, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0048] Figure 1 A communication structure that may be provided in a 6G system according to an embodiment of the present disclosure is shown. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0049] 6G systems are expected to have 50 times more simultaneous radio connection capabilities than 5G radio systems. URLLC, a key feature of 5G, will become a more dominant technology in 6G communications by providing end-to-end latency of less than 1 millisecond. In 6G systems, volume spectrum efficiency will be much better than the currently commonly used area spectrum efficiency. 6G systems will be able to provide very long battery life and advanced battery technology for energy harvesting, so mobile devices do not need to be charged separately in 6G systems. In 6G, new network characteristics may be as follows.

[0050] - Satellite converged networking: To provide global mobile population, 6G is expected to be integrated with satellite. Integrating terrestrial, satellite, and airborne networks into a single wireless communication system is very important for 6G.

[0051] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, and wireless evolution will be updated from "Internet of Things" to "Intelligent Connection". AI can be applied to every step of the communication process (or every step of signal processing, as described later).

[0052] - Seamless integration of wireless information and energy transfer: 6G wireless networks will provide power to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0053] -Ubiquitous Ultra-3D Connectivity: Ultra-3D connectivity will arise from ubiquitous 6G to access networks and core network functions on drones and very low Earth orbit satellites.

[0054] Given the above new 6G network features, some common requirements may be as follows:

[0055] -Small Cell Network: The concept of small cell network is introduced into cellular system to improve the quality of received signal by improving processing throughput, energy efficiency and spectrum efficiency. Therefore, small cell network is an essential feature of communication system used in 5G and beyond 5G (5GB). Therefore, 6G communication system will also adopt the characteristics of small cell network.

[0056] -Ultra-dense heterogeneous network: Ultra-dense heterogeneous network will be another important feature of 6G communication system. Multi-layer network composed of heterogeneous networks will improve the overall service quality and reduce costs.

[0057] - High Capacity Backhaul: Backhaul connectivity is characterized by a high capacity backhaul network supporting a large volume of traffic. High-speed fiber and free space optics (FSO) systems could be a possible solution to this problem.

[0058] - Radar technology integrated with mobile technology: High-precision positioning (or location-based services) through communication is one of the characteristics of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0059] -Software and virtualization: Software and virtualization are two important features that are fundamental to the design process in 5Gb networks to ensure flexibility, reconfigurability, and programmability. In addition, there are potentially billions of devices sharing on a shared physical infrastructure.

[0060] The core implementation technologies for 6G systems are described below.

[0061] -Artificial Intelligence: The most important new technology that will be introduced in 6G systems is artificial intelligence (AI). 4G systems do not involve artificial intelligence. 5G systems will support partial or very limited artificial intelligence. However, 6G systems will fully support artificial intelligence for automation. Advances in machine learning will create a more intelligent network for real-time communications in 6G. The introduction of artificial intelligence in the telecommunications sector can simplify and improve real-time data transmission. AI can use a large number of analyses to determine the way to perform complex target operations, which means that AI can improve efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be completed instantly by using artificial intelligence. AI may also play an important role in M2M, machine-to-human, and human-to-machine communications. In addition, AI may become a fast communication method in brain-computer interfaces (BCI). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, smart cognitive radios, self-sustaining wireless networks, and machine learning.

[0062] -THz communication (THz communication): Data rates can be increased by increasing bandwidth. This can be achieved by using wide-bandwidth THz communication and applying advanced massive MIMO technology. Terahertz waves, also known as submillimeter radiation, refer to the frequency band between 0.1 and 10 THz, and the corresponding wavelengths generally range from 0.03 mm to 3 mm. The 100GHz-300GHz frequency band range (THz band) is considered to be the main part of the THz band for cellular communications. Adding the THz band to the millimeter wave band can increase the capacity of 6G cellular communications. 300GHz-3THz in the defined THz band belongs to the far infrared (IR) band. The 300GHz-3THz band is part of the optical band, but it is located on the boundary of the optical band and is located after the RF band. Therefore, the 300GHz-3THz band shows similarities with RF. Figure 2 The electromagnetic spectrum is shown according to one embodiment of the present disclosure. Figure 2 The embodiments of can be combined with various embodiments of the present disclosure. Key characteristics of terahertz communications include (i) widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (for which highly directional antennas are essential). The narrow beamwidth produced by highly directional antennas can reduce interference. The small wavelength of terahertz signals allows a greater number of antenna elements to be integrated into devices and base stations operating in this frequency band. This enables the use of advanced adaptive array techniques that can overcome range limitations.

[0063] - Massive MIMO

[0064] -HBF, Holographic Beamforming

[0065] -Optical wireless technology

[0066] -FSO backhaul network

[0067] - Non-Terrestrial Network, NTN

[0068] -Quantum communication

[0069] - No cellular communication

[0070] -Integration of wireless information and power transmission

[0071] -Integration of wireless communication and sensing

[0072] - Integrated access and backhaul network

[0073] -Big Data Analysis

[0074] -Reconfigurable smart surface

[0075] -Metaverse

[0076] -Blockchain

[0077] -UAV, Unmanned Aerial Vehicle: Unmanned aerial vehicles (UAV) or drones will be an important part of 6G wireless communications. In most cases, high-speed data wireless connectivity is provided using drone technology. The BS entity is installed on the drone to provide cellular connectivity. Drones have specific features that fixed base station infrastructure does not have, such as easy deployment, strong line-of-sight links, and freedom of controlled movement. In emergency situations such as natural disasters, it is not economically feasible to deploy ground communication infrastructure and sometimes it is impossible to provide services in unstable environments. Drones can easily handle these situations. Drones will become a new paradigm in wireless communications. The technology meets the three basic requirements of wireless networks: eMBB, URLLC, and mMTC. Drones can also support many other uses, such as enhanced network connectivity, fire detection, disaster emergency services, security and monitoring, pollution monitoring, parking monitoring, accident monitoring, etc. Therefore, drone technology is recognized as one of the most important technologies for 6G communications.

[0078] - Autonomous driving, self-driving: For perfect autonomous driving, vehicles must communicate with each other to inform each other of dangerous situations, or vehicles must communicate with infrastructure such as parking lots and traffic lights to check information such as parking location information and signal change time. Vehicle-to-everything (V2X), a key element in building autonomous driving infrastructure, is a technology that allows vehicles to communicate and share information with various elements on the road in order to perform autonomous driving (for example, vehicle-to-vehicle (V2V) wireless communication and vehicle-to-infrastructure (V2I) wireless communication). In order to maximize the performance of autonomous driving and ensure high safety, fast transmission speeds and low-latency technologies are essential. In addition, in the future, autonomous driving will not only issue warnings or guidance information to the driver, but will actively intervene in vehicle operation and directly control the vehicle in dangerous situations, so the amount of information that needs to be sent and received will be huge, and 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0079] For the sake of clarity, the description focuses on 5G NR, but the technical idea of ​​one embodiment of the present disclosure is not limited thereto. Various embodiments of the present disclosure may also be applicable to 6G communication systems.

[0080] Figure 3 The structure of the NR system based on the embodiment of the present disclosure is shown. Figure 3 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0081] refer to Figure 3 , the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 may include a next generation Node B (gNB) and / or an evolved Node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to as other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to as other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0082] Figure 3 The embodiment of illustrates a case where only gNB is included. The BSs 20 may be connected to each other via an Xn interface. The BSs 20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, the BSs 20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a user plane function (UPF) 30 via an NG-U interface.

[0083] The radio interface protocol layer between the UE and the network can be classified into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model known in the communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel, and the radio resource control (RRC) layer located at the third layer controls the radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0084] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol stack for the user plane of Uu communication, and Figure 4 (b) in FIG. 5 shows the radio protocol stack of the control plane for Uu communication. Figure 4 (c) shows the radio protocol stack of the user plane for SL communication, and Figure 4 (d) in the figure shows the radio protocol stack of the control plane for SL communication.

[0085] refer to Figure 4 , the physical layer provides information transfer services to the upper layer through the physical channel. The physical layer is connected to the media access control (MAC) layer, which is the upper layer of the physical layer, through the transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how the data is transmitted through the radio interface and what characteristics of the data it transmits.

[0086] Between different physical layers (ie, the PHY layer of the transmitter and the PHY layer of the receiver), data is transferred through a physical channel. The physical channel may be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and the physical channel uses time and frequency as radio resources.

[0087] The MAC layer provides services to the Radio Link Control (RLC) layer, which is a higher layer of the MAC layer, via logical channels. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transfer services through logical channels.

[0088] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). In order to ensure different Quality of Service (QoS) required by Radio Bearers (RBs), the RLC layer provides three types of operation modes, namely, Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0089] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is used to control logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of RBs. RBs are logical paths for data delivery between UEs and the network provided by the first layer (i.e., the physical layer or PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, the packet data convergence protocol (PDCP) layer, and the service data adaptation protocol (SDAP) layer).

[0090] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include delivery, header compression and encryption of user data. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include delivery and encryption / integrity protection of control plane data.

[0091] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0092] Configuration of RB means a process for specifying radio protocol layers and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. RBs can then be classified into two types, namely, signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for sending RRC messages in the control plane. DRBs are used as a path for sending user data in the user plane.

[0093] When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain the connection with the core network and release its connection with the BS.

[0094] Data is sent from the network to the UE through a downlink transport channel. Examples of downlink transport channels include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent on a downlink SCH or may be sent on an additional downlink multicast channel (MCH). In addition, data is sent from the UE to the network through an uplink transport channel. Examples of uplink transport channels include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending user traffic or control messages.

[0095] Examples of logical channels belonging to a higher layer of a transport channel and mapped to the transport channel may include a broadcast channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0096] Figure 5 The structure of a radio frame of NR according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0097] refer to Figure 5 In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10 ms and can be defined as consisting of two half frames (HF). A half frame can include five 1 ms subframes (SF). A subframe (SF) can be extended into one or more slots, and the number of slots within a subframe can be determined by a subcarrier spacing (SCS). Each slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0098] When a normal CP is used, each time slot may include 14 symbols. When an extended CP is used, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0099] Table 2 below shows the number of symbols per slot (N) depending on the SCS configuration (u) when a normal CP or an extended CP is used. slot symb ), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0100] [Table 2]

[0101]

[0102] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) may be configured differently between multiple cells integrated into one UE. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., subframe, time slot, or TTI) (collectively referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently in the integrated cells.

[0103] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15 kHz, a wide range of traditional cellular bands can be supported, and with an SCS of 30 kHz / 60 kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz can be used to overcome phase noise.

[0104] The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values ​​of the frequency ranges may be changed (or varied), for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).

[0105] [Table 3]

[0106] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450 MHz – 6000 MHz 15, 30, 60kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0107] As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in Table 4 below, FR1 may include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 may include unlicensed bands. The unlicensed bands may be used for various purposes, for example, the unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0108] [Table 4]

[0109] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 410MHz – 7125MHz 15, 30, 60kHz FR2 24250MHz – 52600MHz 60, 120, 240kHz

[0110] Figure 6The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown. Figure 6 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0111] refer to Figure 6 , a slot includes multiple symbols in the time domain. For example, in the case of normal CP, one slot may include 14 symbols. For example, in the case of extended CP, one slot may include 12 symbols. Alternatively, in the case of normal CP, one slot may include 7 symbols. However, in the case of extended CP, one slot may include 6 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) may be defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP may correspond to a parameter set (e.g., SCS, CP length, etc.).

[0112] A carrier may include a maximum of N BWPs (eg, 5 BWPs). Data communication may be performed via the activated BWPs. Each element may be referred to as a resource element (RE) in a resource grid, and one complex symbol may be mapped to each element.

[0113] Hereinafter, a bandwidth part (BWP) and a carrier will be described in detail.

[0114] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0115] For example, the BWP may be at least any one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in a DL BWP other than an activated DL BWP on a primary cell (PCell). For example, the UE may not receive a PDCCH, a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) other than an activated DL BWP. For example, the UE may not trigger a channel state information (CSI) report for an unactivated DL BWP. For example, the UE may not send a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) other than an activated UL BWP. For example, in the case of a downlink, the initial BWP may be given as a set of contiguous RBs for a remaining minimum system information (RMSI) control resource set (CORESET) (configured by a physical broadcast channel (PBCH)). For example, in the case of an uplink, the initial BWP may be given by a system information block (SIB) for a random access procedure. For example, a default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be an initial DL BWP. To save energy, if the UE cannot detect downlink control information (DCI) during a specified period, the UE may switch the UE's active BWP to the default BWP.

[0116] In addition, a BWP may be defined for SL. The same SL BWP may be used in transmission and reception. For example, a transmitting UE may send a SL channel or SL signal on a specific BWP, and a receiving UE may receive a SL channel or SL signal on a specific BWP. In a licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for the SL BWP from the BS / network. For example, the UE may receive a configuration for the Uu BWP from the BS / network. SLBWP is (pre-)configured in the carrier for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For UEs in RRC_CONNECTED mode, at least one SL BWP may be activated in the carrier.

[0117] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Assume that Figure 7 In the embodiment, the number of BWPs is 3.

[0118] refer to Figure 7, a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. Additionally, a PRB may be a resource block numbered within each BWP. Point A may indicate a common reference point of the resource block grid.

[0119] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A may be an external reference point of the PRBs of the carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) are aligned in point A. For example, the offset may be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth may be the number of PRBs within a given parameter set.

[0120] Hereinafter, V2X or SL communication will be described.

[0121] The side link synchronization signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

[0122] The physical sidelink broadcast channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information that the UE must first know before SL signal transmission / reception. For example, the default information may be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0123] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0124] Figure 8 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0125] For example, Figure 8 (a) shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) in FIG. 1 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.

[0126] For example, Figure 8 (b) shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) shows UE operation associated with NR resource allocation mode 2.

[0127] refer to Figure 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 UE for SL transmission. For example, in step S800, the base station may send information related to SL resources and / or information related to UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0128] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configuration grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources may be resources that the base station configures / allocates to the first UE through downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources that the base station configures / allocates to the first UE through DCI and / or RRC messages. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first UE. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first UE, and the base station may send a DCI related to the activation or release of the CG resources to the first UE.

[0129] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or first-stage SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH related to the PSCCH to the second UE (e.g., second-stage SCI, MAC PDU, data, etc.). In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report HARQ feedback information to the base station via the PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a preconfigured rule. For example, the DCI may be DCI for SL scheduling. For example, the format of the DCI may be DCI format 3_0 or DCI format 3_1.

[0130] refer to Figure 8(b), in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE may determine the SL transmission resources within the SL resources configured by the base station / network or the preconfigured SL resources. For example, the configured SL resources or the preconfigured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within the selection window by performing a sensing process and a resource (re)selection process. For example, sensing may be performed in units of subchannels. For example, in step S810, the first UE that has selected resources from the resource pool by itself may send a PSCCH (e.g., sidelink control information (SCI) or a first stage SCI) to a second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., a second stage SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0131] In the following, the UE procedure for determining a subset of resources to be reported to higher layers in PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0132] In resource allocation mode 2, higher layers may request the UE to determine a subset of resources from which they will select resources for PSSCH / PSCCH transmission. To trigger this process, in time slot n, higher layers provide the following parameters for PSSCH / PSCCH transmission.

[0133] - the resource pool from which the resources are to be reported;

[0134] - L1 priority, ;

[0135] - Remaining packet delay budget;

[0136] - the number of subchannels used for PSSCH / PSCCH transmission in a time slot, ;

[0137] -Optionally, the resource reservation interval , in milliseconds.

[0138] - As part of the re-evaluation or preemption process, if higher layers request the UE to determine a subset of resources from which the higher layers will select resources for PSSCH / PSCCH transmission, the higher layers provide the set of resources that may be subject to re-evaluation and the set of resources that may be subject to preemption .

[0139] – It is up to the UE implementation to determine the time slot A subset of resources requested previously or subsequently by a higher layer, where yes and The time slot with the smallest time slot index among equal ,in is defined in time slots, and where It is the SCS configuration of SL BWP.

[0140] The following higher-level parameters influence this process:

[0141] - sl-SelectionWindowList: internal parameters is set to come from the The corresponding value of the higher-level parameter sl-SelectionWindowList for a given value.

[0142] - sl-Thres-RSRP-List: This higher layer parameter is used for each combination Provides RSRP thresholds, where is the value of the Priority field in the received SCI Format 1-A, and is the priority with which the UE selects resources for transmission; for a given invocation of this procedure, .

[0143] - sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurement.

[0144] -sl-ResourceReservePeriodList

[0145] - sl-SensingWindow: internal parameters Defined as the number of time slots corresponding to sl-SensingWindow milliseconds

[0146] - sl-TxPercentageList: used for a given Internal parameters Defined as sl-TxPercentageList that converts from percentages to ratios ( )

[0147] - sl-PreemptionEnable: If sl-PreemptionEnable is provided, and if it is not equal to "enabled", the internal parameter Set to the parameter sl-PreemptionEnable provided by the higher layer.

[0148] Resource reservation interval (if provided) converts from milliseconds to logical slots, yielding .

[0149] mark:

[0150] It can represent the set of time slots belonging to the side link resource pool.

[0151] For example, the UE may select a candidate resource set (S a For example, when triggering resource (re)selection, the UE may select a candidate resource set (S a For example, when re-evaluation or preemption is triggered, the UE may select a candidate resource set (S a ).

[0152] [Table 5]

[0153]

[0154]

[0155]

[0156] At the same time, partial sensing can be supported for power saving of UE. For example, in LTE SL or LTE V2X, the UE can perform partial sensing based on Table 6 and Table 7.

[0157] [Table 6]

[0158]

[0159]

[0160]

[0161] [Table 7]

[0162]

[0163]

[0164] refer to Figure 8(a) or (b), for example, the first UE may send SCI to the second UE via PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., two-stage SCI) to the second UE via PSCCH and / or PSSCH. In this case, the second UE may decode two consecutive SCIs (e.g., two-stage SCI) to receive PSSCH from the first UE. In the present disclosure, the SCI sent via PSCCH may be referred to as the 1st SCI, the first SCI, the first-stage SCI, or the first-stage SCI format, and the SCI sent via PSSCH may be referred to as the 2nd SCI, the second SCI, the second-stage SCI, or the second-stage SCI format. For example, the first-stage SCI format may include SCI format 1-A, and the second-stage SCI format may include SCI format 2-A and / or SCI format 2-B.

[0165] Hereinafter, an example of SCI format 1-A will be described.

[0166] SCI format 1-A is used for scheduling of PSSCH and second stage SCI on PSSCH.

[0167] The following information is transmitted via SCI Format 1-A:

[0168] - Priority - 3 bits

[0169] - Frequency resource allocation - When the value of the higher layer parameter sl-MaxNumPerReserve is configured as 2, the ceiling (log 2 (N SL subChannel (N SL subChannel +1) / 2)); otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured as 3, the ceiling log 2 (N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6)

[0170] - Time Resource Allocation - 5 bits when the higher layer parameter sl-MaxNumPerReserve is configured with a value of 2; otherwise 9 bits when the higher layer parameter sl-MaxNumPerReserve is configured with a value of 3

[0171] - Resource reservation period - ceiling (log2 N rsv_period ), where N rsv_period is the number of entries in the higher-layer parameter sl-ResourceReservePeriodList; otherwise it is 0.

[0172] -DMRS pattern - ceiling (log 2 N pattern ), where N pattern is the number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList

[0173] - Phase 2 SCI format - 2 bits, as defined in Table 8

[0174] - Beta_offset indicator – 2 bits provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0175] - DMRS port number - 1 bit, as defined in Table 9

[0176] - Modulation and coding scheme – 5 bits

[0177] - Additional MCS table indicator - 1 bit if one MCS table is configured by the higher layer parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are configured by the higher layer parameter sl-Additional-MCS-Table; 0 bit otherwise

[0178] -PSFCH overhead indication - 1 bit if higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise 0 bit

[0179] - Reserved – the number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to zero.

[0180] [Table 8]

[0181] The value of the second stage SCI format field Phase II SCI format 00 SCI Format 2-A 01 SCI Format 2-B 10 reserve 11 reserve

[0182] [Table 9]

[0183] The value of the DMRS Port Number field Antenna Port 0 1000 1 1000 and 1001

[0184] Hereinafter, an example of SCI format 2-A will be described.

[0185] When the HARQ-ACK information includes ACK or NACK, when the HARQ-ACK information includes only NACK, or when there is no feedback of the HARQ-ACK information, SCI format 2-A is used for decoding of the PSSCH with HARQ operation.

[0186] The following information is transmitted via SCI Format 2-A:

[0187] -HARQ process number——4 bits

[0188] - New data indicator – 1 bit

[0189] - Redundancy version - 2 bits

[0190] - Source ID——8 bits

[0191] - Destination ID – 16 bits

[0192] -HARQ feedback enable / disable indicator - 1 bit

[0193] - Conversion type indicator – 2 bits, as defined in Table 7

[0194] -CSI request – 1 bit

[0195] [Table 10]

[0196] The value of the broadcast type indicator Broadcast Type 00 broadcast 01 Multicast when HARQ-ACK information includes ACK or NACK 10 Unicast 11 Multicast when HARQ-ACK information contains only NACK

[0197] Hereinafter, an example of SCI format 2-B will be described.

[0198] When the HARQ-ACK information includes only NACK, or when there is no HARQ-ACK information feedback, SCI format 2-B is used for decoding of PSSCH with HARQ operation.

[0199] The following information is transmitted via SCI Format 2-B:

[0200] -HARQ process number——4 bits

[0201] - New data indicator – 1 bit

[0202] - Redundancy version - 2 bits

[0203] - Source ID——8 bits

[0204] - Destination ID – 16 bits

[0205] -HARQ feedback enable / disable indicator - 1 bit

[0206] -Region ID——12 digits

[0207] -Communication range requirement – ​​4 bits determined by the higher layer parameter sl-ZoneConfigMCR-Index

[0208] refer to Figure 8 (a) or (b), in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resources, and the second UE may send HARQ feedback to the first UE using the PSFCH resources.

[0209] refer to Figure 8 (a), in step S840, the first UE may send SL HARQ feedback to the base station via the PUCCH and / or the PUSCH.

[0210] Fig. 9 Three broadcast types are shown in accordance with embodiments of the present disclosure. Fig. 9 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig. 9 (a) shows a broadcast type SL communication, Fig. 9 (b) shows unicast type SL communication, and Fig. 9 (c) shows a multicast type SL communication. In the case of a unicast type SL communication, the UE can perform a one-to-one communication with another UE. In the case of a multicast type SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication may be replaced by SL multicast communication, SL one-to-many communication, and the like.

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

[0212] In the present disclosure, a channel may refer to a set of frequency domain resources in which listen-before-talk (LBT) is performed. In NR-U, a channel may refer to an LBT bandwidth of 20 MHz 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.

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

[0214] In this disclosure, channel occupation time (COT) may refer to the time domain resources acquired by the base station or UE after LBT is successful. It may be shared between the base station (or UE) and the UE (or base station) that acquires the CO, which may be referred to as COT sharing. Depending on the initiating device, this may be referred to as gNB-initiated COT or UE-initiated COT.

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

[0216] Fig.10 An example of a wireless communication system supporting an unlicensed band based on an embodiment of the present disclosure is shown. For example, Fig.10 Unlicensed spectrum (NR-U) wireless communication systems may be included. Fig.10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

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

[0218] When the base station and UE Fig.10 When sending and receiving signals on LCC and UCC of carrier aggregation as shown in (a), LCC and UCC can be configured as primary CC (PCC) and secondary CC (SCC) respectively. The base station and UE can send and receive signals on one UCC or on multiple carrier aggregation UCCs, such as Fig.10 As shown in (b) of . In other words, the base station and the UE can send and receive signals only on the UCC without using any LCC. For independent operation, PRACH transmission, PUCCH transmission, PUSCH transmission, SRS transmission, etc. can be supported on the UCell.

[0219] exist Fig.10 In the embodiment of the present invention, the base station may be replaced by a UE. In this case, for example, PSCCH transmission, PSSCH transmission, PSFCH transmission, S-SSB transmission, etc. may be supported on the UCell.

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

[0221] - Channel: A carrier or a part of a carrier consisting of a set of consecutive RBs, where the channel access procedure is performed in a shared spectrum.

[0222] - Channel Access Procedure (CAP): A procedure to evaluate channel availability based on sensing before signal transmission in order to determine whether other communication nodes are using the channel. The basic sensing unit is a unit with a duration of T sl =9us sensing time slot. The base station or UE senses the channel during the sensing time slot duration. If the power detected within at least 4us during the sensing time slot duration is less than the energy detection threshold X thresh , then the sensing time slot duration is considered to be T sl Idle. Otherwise, the sensing time slot duration is T sl = 9us is considered busy. CAP may also be referred to as Listen Before Talk (LBT). For example, a channel access procedure (CAP) may include LBT, and channel sensing may be performed to monitor the power of the channel during a specific time interval (channel sensing interval) for CAP.

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

[0224] - Channel Occupancy Time (COT): The total time that a base station / UE and any base stations / UEs sharing the channel occupation can perform transmissions on a channel after the base station / UE performs a channel access procedure. In the case of determining the COT, if a transmission gap is less than or equal to 25us, the gap duration can be counted into the COT. The COT can be shared for transmissions between a base station and the corresponding UE.

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

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

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

[0228] Fig.11 A method of occupying resources in an unlicensed band according to an embodiment of the present disclosure is shown. Fig.12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

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

[0230] Table 11 shows an example of the channel access procedure (CAP) supported in NR-U.

[0231] [Table 11]

[0232]

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

[0234] Hereinafter, an LBT subband (SB) (or RB set) will be described.

[0235] In a wireless communication system supporting an unlicensed band, one cell (or carrier (e.g., CC)) or BWP configured for a UE may have a broadband having a larger bandwidth (BW) than in conventional LTE. However, the BW requiring CCA based on independent LBT operation may be restricted according to regulations. A subband (SB) in which LBT is performed independently is defined as an LBT-SB. Then, multiple LBT-SBs may be included in one broadband cell / BWP. A set of RBs included in the LBT-SB may be configured through higher 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 one cell / BWP.

[0236] Fig.12 A case where a plurality of LBT-SBs are included in an unlicensed band according to an embodiment of the present disclosure is shown. Fig.12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

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

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

[0239] The CAPC for MAC CE and radio bearers can be fixed or configured to operate in FR1:

[0240] - Fixed as the lowest priority for filling Buffer Status Report (BSR) and Recommended Bit Rate MAC CE;

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

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

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

[0244] [Table 12]

[0245]

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

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

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

[0249] In a Type 1 DL CAP, the length of the duration spanned by a sensing slot that is sensed as idle before a transmission may be random. Type 1 DL CAP may be applied to the following transmissions:

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

[0251] - A transmission initiated by a base station, comprising (i) only a discovery burst or (ii) a discovery burst multiplexed with non-unicast information.

[0252] Fig.13 A CAP operation performed by a base station to transmit a downlink signal through an unlicensed band according to an embodiment of the present disclosure is illustrated. Fig.13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0253] refer to Fig.13 , the base station can sense the delay duration T d The base station may adjust the counter N by sensing the channel during the additional sensing slot duration according to the following steps:

[0254] Step 1) (S120) The base station sets N to N init (N = N init ), where N init is between 0 and CW p Then, continue with step 4.

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

[0256] Step 3) (S150) The base station senses the channel during the additional sensing time slot duration. If the additional sensing time slot duration is idle (yes), proceed to step 4. Otherwise (no), proceed to step 5.

[0257] Step 4) (S130) If N=0 (Y), the base station terminates the CAP (S132). Otherwise (No), proceed to step 2.

[0258] Step 5) (S160) The base station senses the channel until the additional delay duration T d A busy sensing time slot is detected within the time interval or an additional delay duration T is detected. d All time slots are free.

[0259] Step 6) (S170) If the channel is sensed to be in the additional delay duration T d If all time slots of are idle for the duration of (yes), proceed to step 4. Otherwise (no), proceed to step 5.

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

[0261] [Table 13]

[0262] Channel access priority (p) <![CDATA[m p ]]> <![CDATA[CW min,p ]]> <![CDATA[CW max,p ]]> <![CDATA[T mcot,p ]]> <![CDATA[Allowed CW p Size]]> 1 1 3 7 2ms {3,7} 2 1 7 15 3ms {7,15} 3 3 15 63 8 or 10ms {15,31,63} 4 7 15 1023 8 or 10ms {15,31,63,127,255,511,1023}

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

[0264] Configure the delay duration T in the following order d : Duration T f (16 us) + m p The duration of the continuous sensing time slot is T sl (9us). T f Including the sensing time slot duration T at the beginning of the 16us duration sl .

[0265] Satisfies the following relationship: CW min,p <= CW p <= CW max,p .CW p Available via CW p = CW min,p , and is updated (CW size update) based on HARQ-ACK feedback (e.g., ratio of ACK or NACK) of the previous DL burst (e.g., PDSCH) before step 1. For example, the CW size may be updated based on the HARQ-ACK feedback for the previous DL burst. p Initialize to CW min,p . Alternatively, CW p Can be increased to the next higher allowed value or left as is.

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

[0267] In a Type 2 DL CAP, the length of the duration spanned by a sensing slot sensed as idle before transmission may be determined. Type 2 DL CAPs are divided into Type 2A / 2B / 2C DL CAPs.

[0268] Type 2A DL CAP can be applied to the following transmissions. In Type 2A DL CAP, the base station can sense that the channel is idle for at least the sensing duration T. short_dl = 25us and then the transmission is performed immediately. Here, T short_dl Including duration T f (=16us) and immediately after the duration T fAfter a sensing time slot duration, the duration T f Includes a sensing slot at its beginning.

[0269] - A transmission initiated by a base station, including (i) only a discovery burst or (ii) a discovery burst multiplexed with non-unicast information, or

[0270] - Transmission by the base station after a gap of 25us from the transmission by the UE within the shared channel occupation.

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

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

[0273] The UE may perform a Type 1 or Type 2 CAP for UL signal transmission in the unlicensed band. In general, the UE may perform a CAP (e.g., Type 1 or Type 2) for UL signal transmission configured by the base station. For example, a UL grant that schedules PUSCH transmission (e.g., DCI formats 0_0 and 0_1) may include CAP type indication information for the UE.

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

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

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

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

[0278] - Transmissions related to the Random Access Procedure (RAP)

[0279] Fig.14A Type 1 CAP operation for transmitting an uplink signal performed by a UE according to an embodiment of the present disclosure is illustrated. Fig.14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0280] refer to Fig.14 , the UE can sense whether the channel is idle for the sensing delay duration T d Then, if the counter N is zero, the UE may perform transmission (S234). In this case, the UE may adjust the counter N by sensing the channel during the additional sensing slot duration according to the following steps:

[0281] Step 1) (S220) UE sets N to N init (N = N init ), where N init is between 0 and CW p Then, continue with step 4.

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

[0283] Step 3) (S250) The UE senses the channel during the additional sensing time slot duration. If the additional sensing time slot duration is idle (yes), proceed to step 4. Otherwise (no), proceed to step 5.

[0284] Step 4) (S230) If N=0 (Y), the UE terminates the CAP (S232). Otherwise (No), proceed to step 2.

[0285] Step 5) (S260) The UE senses the channel until the additional delay duration T d A busy sensing time slot is detected within the time interval or an additional delay duration T is detected. d All time slots are free.

[0286] Step 6) (S270) If the channel is sensed to be in the additional delay duration T d If all time slots of are idle for the duration of (yes), proceed to step 4. Otherwise (no), proceed to step 5.

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

[0288] [Table 14]

[0289] Channel access priority (p) <![CDATA[m p ]]> <![CDATA[CW min,p ]]> <![CDATA[CW max,p ]]> <![CDATA[T ulmcot,p ]]> <![CDATA[Allowed CW p Size]]> 1 2 3 7 2ms {3,7} 2 2 7 15 4ms {7,15} 3 3 15 1023 6 or 10 ms {15,31,63,127,255,511,1023} 4 7 15 1023 6 or 10 ms {15,31,63,127,255,511,1023}

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

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

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

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

[0294] In a Type 2 UL CAP, the length of the duration spanned by the sensing slot that is sensed to be idle before transmission can be determined. Type 2 UL CAP is divided into Type 2A / 2B / 2C UL CAP. In a Type 2A UL CAP, the UE can determine the duration of the sensing slot that is sensed to be idle before transmission. short_dl = 25us and then the transmission is performed immediately. Here, T short_dl Including duration T f (=16us) and immediately after the duration T f The duration of a sensing slot after that. In Type 2A UL CAP, T fIn a Type 2B UL CAP, the UE may sense that the channel is idle for a sensing duration T. f =16us after which the transmission is performed immediately. In Type 2B UL CAP, T f The sensing slot within 9us from the end of the duration is included. In Type 2C UL CAP, the UE does not perform channel sensing before performing transmission.

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

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

[0297] For example, Type 2A (also known as Cat-2 LBT (one-time LBT) or one-time LBT) can be a 25u one-time LBT. In this case, the transmission can start immediately after idle sensing of at least 24us interval. Type 2A can be used to initiate the transmission of SSB and non-unicast DL information. That is, the UE can sense the channel for 25us within the COT, and if the channel is idle, the UE can try to send data by occupying the channel.

[0298] For example, type 2B can be a 16us one-time LBT. In this case, the transmission can start immediately after the idle sensing of the 16us gap. That is, the UE can sense the channel for 16us within the COT, and if the channel is idle, the UE can try to send data by occupying the channel.

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

[0300] In the sidelink unlicensed band, the UE may perform a channel access operation based on listen before talk (LBT). Before the UE accesses a channel in the unlicensed band, the UE should check whether the channel to be accessed is idle (e.g., a state in which the UE does not occupy the channel, a state in which the UE can access the corresponding channel and transmit data) or busy (e.g., a state in which the channel is occupied and data is transmitted / received on the corresponding channel, and a UE attempting to access the channel cannot transmit data when the channel is busy). That is, the operation in which the UE checks whether the channel is idle or busy may be referred to as a clear channel assessment (CCA), and the UE may check whether the channel is idle or busy during the CCA duration.

[0301] The following describes the process of UE reporting HARQ-ACK on the sidelink.

[0302] The UE may be instructed by an SCI format, which schedules the N PSSCH subch The UE starts receiving the PSSCH to transmit the PSFCH including the HARQ-ACK information in response to the reception of the PSSCH. The UE provides the HARQ-ACK information including the ACK or the NACK or only the NACK.

[0303] The number of time slots in the resource pool used for PSFCH transmission opportunity resources can be provided to the UE via sl-PSFCH-Period-r16. If this number is zero, PSFCH transmission from the UE is disabled in the resource pool. PSFCH PSSCH = 0, the UE expects to k SL (0≤k < T' max ) has PSFCH transmission opportunity resources, where t' k SL is the time slot in the resource pool, and T'max is the number of time slots in the resource pool within 10240 milliseconds, and N PSFCH PSSCH Provided in sl-PSFCH-Period-r16. The UE may be instructed by upper layers not to send PSFCH in response to reception of PSSCH. If the UE receives PSSCH in a resource pool and the HARQ feedback enable / disable indicator field included in the associated SCI format 2-A or SCI format 2-B has a value of 1, the UE provides HARQ-ACK information via a PSFCH transmission from the resource pool. The UE sends PSFCH in a first time slot, where the first time slot is a time slot that includes PSFCH resources and is after the minimum number of time slots provided by sl-MinTimeGapPSFCH-r16 of the resource pool after the last time slot of PSSCH reception.

[0304] sl-PSFCH-RB-Set-r16 is used to provide the UE with M in the resource pool. PSFCH PRB,set PRBs are used for PSFCH transmission on PRBs in the resource pool. subch and N PSFCH PSSCH The UE allocates M for slot i and subchannel j among the PSSCH slots associated with the PSFCH slot. PRB, set PSFCH PRB among PRBs [(i+jN PSFCH PSSCH )M PSFCH subch,slot , (i+1+jN PSFCH PSSCH )-M PSFCH subch,slot -1]. Here, M PSFCH subch,slot = M PSFCH PRB,set / (N subch - NPSFCH PSSCH )、0≤i < N PSFCH PSSCH , 0 ≤ j < N subch , and the allocation starts in ascending order of i, and then continues in ascending order of j. The UE expects M PSFCH PRB,set YesN subch ·N PSFCH PSSCH multiples of.

[0305] The UE determines the number of available PSFCH resources for multiplexing the HARQ-ACK information included in the PSFCH transmission as R PSFCH PRB,CS = N PSFCH type ·M PSFCH subch,slot ·N PSFCH CS Here, N PSFCH CS can be the number of cyclic shift pairs for a resource pool and based on instructions from higher layers,

[0306] -N PSFCH type = 1, and M PSFCH subch,slot The PRB may be associated with the starting subchannel of the corresponding PSSCH.

[0307] -N PSFCH type = N PSSCH subch And N PSSCH subch ·M PSFCH subch,slot N of PRB and corresponding PSSCH PSSCH subch One or more sub-channels among the sub-channels are correlated.

[0308] PSFCH resources are first divided into N PSFCH type ·M PSFCH subch,slot The PRB indices in the PRB are indexed in ascending order, and then in N PSFCH CS The cyclic shift pair indices among the cyclic shift pairs are indexed in ascending order.

[0309] The UE determines the index of the PSFCH resource for PSFCH transmission in response to PSSCH reception as (P ID + M ID ) modR PSFCH PRB,CS Here, P ID is the physical layer source ID provided by SCI format 2-A or 2-B for scheduling PSSCH reception, M ID is the ID of the UE receiving the PSSCH, indicated from a higher layer when the UE detects SCI format 2-A in which the broadcast type indicator field value is "01", otherwise M ID is 0.

[0310] The UE uses Table 15 to determine the PSFCH CS and the cyclic shift pair index corresponding to the PSFCH resource index to calculate the cyclic shift α value m 0 value.

[0311] [Table 15]

[0312]

[0313] When the UE detects an SCI format 2-A with a broadcast type indication field value of "01" or "10" as shown in Table 16, or when the UE detects an SCI format 2-B or SCI format 2-A with a broadcast type indication field value of "11" as shown in Table 17, the UE determines m cs is a value used to calculate the cyclic shift α value. The UE applies one of the cyclic shifts to the sequence used in the PSFCH transmission.

[0314] [Table 16]

[0315] HARQ-ACK value 0 (NACK) 1 (ACK) Sequence cyclic shift 0 6

[0316] [Table 17]

[0317] HARQ-ACK value 0 (NACK) 1 (ACK) Sequence cyclic shift 0 N / A

[0318] For example, an LBT operation may be performed to ensure a transmission opportunity in an unlicensed band. An LBT operation is an operation of performing channel sensing in a specific interval (contention window) before attempting to transmit on a resource, and then performing transmission based on the resource only when the resource is idle. For example, in SL-U, an LBT operation can be performed in units of RB sets. In SL communications on an unlicensed band, PSFCH may be performed in multiple PSFCH opportunities to increase the probability of successful transmission. In order to alleviate the problem of receiving UEs (completely) skipping PSFCH transmissions due to LBT failures, if multiple PSFCH opportunities (on different time resources) are mapped for one PSSCH slot, it may be unclear based on which of them the sending UE should perform retransmission resource selection (ensuring the minimum processing time required between the PSFCH reception time and the retransmission resource time).

[0319] Meanwhile, in future systems, the UE may perform sidelink transmission and / or reception operations in an unlicensed band. For operations in an unlicensed band, depending on the regulations or requirements of a specific frequency band, the UE's transmission may be preceded by a channel sensing operation (e.g., energy detection / measurement) for a channel to be used, and only when, as a result of the channel sensing, it is determined that the channel or RB set to be used is idle (e.g., if the measured energy is less than, equal to, or greater than a specific threshold), the UE may perform transmission in the unlicensed band, and if, according to the result of the channel sensing, it is determined that the channel or RB set to be used is busy (e.g., if the measured energy is greater than, equal to, or greater than a specific threshold), the UE may cancel all or part of the transmission in the unlicensed band.

[0320] Meanwhile, in the operation in the unlicensed band, the UE may omit or simplify the channel sensing operation (i.e., make the channel sensing interval relatively small) within a specific time interval after transmission within a specific time period, or conversely, after a specific time interval after transmission, the UE may decide whether to transmit after performing a usual channel sensing operation.

[0321] On the other hand, in transmission in an unlicensed band, depending on regulations or requirements, a time interval and / or a size of a frequency occupied region and / or a power spectral density (PSD) of a signal / channel transmitted by a UE may be greater than or equal to a specific level, respectively.

[0322] On the other hand, in the unlicensed band, in order to simplify channel sensing, it can be informed through channel occupation time (COT) interval information that the channel obtained through the initial general channel sensing is occupied for a specific period of time, and the length of the COT interval can be configured to have different maximum values ​​depending on the priority of the service or data packet or the channel access priority class (CAPC).

[0323] Depending on the specification in the unlicensed band, the sidelink transmission may be sent via multiple RBs spaced apart. On the other hand, for transmission on the uplink channel in the unlicensed band, the base station may provide the UE with information about a single or multiple RB sets and a single or multiple interlaces, and the final transmission resource may be determined as the intersection of the RBs within the provided RB set and the RBs corresponding to the provided interlaces.

[0324] Alternatively, interleaving may be defined in a common RB (CRB) grid. For example, in a CRB grid, within a set of RBs spaced 10 RBs apart at 15 kHz and 5 RBs apart at 30 kHz, the interleaving index of each interleaving may be determined based on an RB offset based on CRB #0.

[0325] On the other hand, since sensing and / or resource (re)selection are performed in units of subchannels in the case of sidelink communication, it may be necessary to represent the subchannels in the form of interlaces and / or RB sets. In this way, subchannel-based sensing operations and / or resource reservation methods can be reused as much as possible.

[0326] On the other hand, when sidelink transmission and reception are performed based on 60 kHz SCS, an occupied channel bandwidth (OCB) requirement may require a method of ensuring that the bandwidth size within the occupied channel is greater than or equal to a certain ratio (e.g., 80%) of the channel size.

[0327] In various embodiments of the present disclosure, the embodiments for 60kHz SCS may be extended and applied to SCSs other than 15kHz and / or 30kHz SCS. In various embodiments of the present disclosure, the embodiments for 60kHz SCS may be extended and applied to 15kHz and / or 30kHz SCS.

[0328] On the other hand, a substantial increase in the number of allocated PRBs for sidelink transmission to meet the OCB requirement and the PSD requirement may result in a shortage of frequency domain resources, especially PSFCH resources. On the other hand, if a small number of PRBs are allocated to meet the OCB requirement and are located at the end of the channel, the overall transmit power may be limited by the PSD requirement.

[0329] On the other hand, during the channel occupation time (COT) interval, the OCB requirement can be temporarily omitted. However, in this case, for example, the occupied channel bandwidth still needs to be greater than and / or equal to 2 MHz.

[0330] For example, when transmitting PSCCH / PSSCH, if PSSCH is based on continuous RB transmission (for example, if the component subchannel consists of continuous PRBs), in order to meet the OCB requirement, a subchannel having some component PRBs located outside the RB set may be used as a transmission resource when transmitting PSCCH / PSSCH. For example, when a specific subchannel is used for PSCCH / PSSCH transmission, the UE may use only the PRBs included in the RB set among the PRBs including the subchannel. For example, the above scheme may be a case where the RB set connected to the RB set is not included in the transmission resource. For example, when a specific subchannel is used for PSCCH / PSSCH transmission, the UE may use at least the minimum number of component PRBs that meet the OCB requirement as a transmission resource. For example, when calculating the TBS for the additionally used subchannel, the UE may exclude the resources of the subchannel when calculating the number of PRBs. For example, when calculating the TBS for the additionally used subchannel, assuming that the entire component PRB is used, the UE may include the resources of the subchannel when calculating the number of PRBs.

[0331] For example, when transmitting an SL channel, a discontinuous PRB set may be used as a transmission resource. For example, the PRB gap within a discontinuous PRB set may be (pre)configured. For example, for an SCS of 60kHz, the RB index of the first PRB set may be in the form of 0, 2, 4, 6, ..., and the RB index of the second PRB set may be in the form of 1, 3, 5, ... For example, for an SCS of 60kHz, the RB index of the first PRB set may be in the form of 0, 3, 6, 9, ..., the RB index of the second PRB set may be in the form of 1, 4, 7, ..., and the RB index of the third PRB set may be in the form of 2, 5, 8, ... For example, in the above scheme, although the transmit power can be maximized according to the PSD requirement, the scheduling flexibility may be reduced due to the reduction in the amount of resources that can be separated.

[0332] For example, a discontinuous PRB set may include at least two PRBs that meet the OCB requirements. For example, a PRB set may include at least an RB index N and an RB index N+M. For example, the value of M may be (pre)configured to meet the OCB requirements. For example, the value of M may be the minimum value that meets the OCB requirements. For example, when the size of the RB set is P, the value of M may be a value that is an increased value of P*0.8 minus 1. For example, the value of N may be a set of values ​​such that both N and N+M exist within a specific RB set. For example, the number of values ​​of N may be a rounded value of P-0.8*P or a discarded value of 0.2*P, or may be less than the above values. For example, each resource pool and / or each SL channel may be (pre)configured with the number of N or a candidate value of N.

[0333] In addition to the two PRBs required for OCB in the PRB set, the UE may further include additional PRBs according to the PSD requirement to overcome the transmit power limitation. For example, the PRBs comprising the RB set may be divided into multiple RB subsets, each RB subset having a number of P-0.8*P rounded up or 0.2*P rounded down, and discontinuous PRB sets may be organized in such a way that one RB from each RB subset is included for all or some RB subsets. For example, the PRB gap between RB subsets may be a zero or non-zero integer value, and the presence and value of the PRB gap may be configured differently depending on the size of the RB set. For example, a discontinuous PRB set may include an RB index N, a discard value of N+0.2*P, (a discard value of N+0.2*P)*2, ..., N+M.

[0334] For example, when PSFCH resources are derived from PSSCH resources, and / or when PSFCH resources have discontinuous PRB sets as frequency resources, the scheme for deriving RBs for PSFCH from the subchannel index of PSSCH and the PSSCH time slot index can be extended to derive the PRB set for PSFCH.

[0335] Meanwhile, in PSFCH transmission, in addition to the PSFCH RB (used for SL HARQ-ACK feedback), the UE may use a single or multiple common RBs for actual transmission to meet the OCB requirement. For example, the UE may use the minimum number of common RBs for transmission to meet the OCB requirement. For example, the selected common RB (or its position) may differ depending on the position of the actual PSFCH RB mentioned above. For example, if the OCB requirement is met when the UE sends multiple PSFCHs, the additional common RBs cannot be used for transmission.

[0336] For example, if the UE is capable of transmitting up to N PSFCHs simultaneously, then if the UE uses M common RBs for transmission, the actual maximum number of PSFCH transmissions that can be transmitted simultaneously may change to N-(the number of RBs constituting the interlace)*M.

[0337] For example, when the UE selects a PSFCH to transmit, the UE may select as a transmission target by prioritizing a combination of PSFCH transmissions that meet the OCB requirement over selection based on individual PSFCH SL priorities.

[0338] For example, when selecting a PSFCH to transmit, the UE may select as a transmission target by prioritizing a combination of PSFCH transmissions that minimizes the number of common RBs used to meet the OCB requirement over selection based on a priority per PSFCH. For example, the UE may select a PSFCH to transmit based on the number of common RBs required.

[0339] According to one embodiment of the present disclosure, the UE may allocate a minimum power amount (e.g., a (pre)configured power value or a power value according to a (pre)configured ratio) of the total transmission power to the common RB or each common RB, and distribute the remaining transmission power equally to the PSFCH transmission (for SL HARQ-ACK feedback). Alternatively, for example, the UE may preferentially allocate the entire transmission power to the PSFCH transmission (for SL HARQ-ACK feedback), and then allocate the remaining transmission power to the common RB or each common RB.

[0340] Fig.15A common PRB used to meet the PSD requirement according to one embodiment of the present disclosure is shown. Fig.15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0341] refer to Fig.15 , a common PRB, a first dedicated PRB, and a second dedicated PRB are shown in a frequency band of 1 MHz. For example, the first dedicated PRB and the second dedicated PRB may be resources for PSFCH transmission. For example, the common PRB, the first dedicated PRB, and the second dedicated PRB may be resources of an interleaved structure, although in Fig.15 Alternatively, for example, the common PRB may be a resource of a single interlace (eg, common interlace). For example, the first dedicated PRB and the second dedicated PRB may be PRBs included in the same interlace (eg, first interlace).

[0342] For example, the transmit power associated with transmission performed through the common PRB may be a first transmit power, the transmit power associated with transmission performed through the first dedicated PRB may be a second transmit power, and the transmit power associated with transmission performed through the second dedicated PRB may be a third transmit power. For example, in order to meet the PSD requirement, the sum of the first transmit power, the second transmit power, and the third transmit power may be limited to a specific value (e.g., 10 dB). Here, for example, if the sum of the first transmit power, the second transmit power, and the third transmit power exceeds a specific value, the transmitting UE may meet the PSD requirement by reducing the first transmit power while maintaining the second transmit power and the third transmit power.

[0343] According to one embodiment of the present disclosure, if the transmit power used for PSFCH transmission (for SL HARQ-ACK feedback) is limited due to PSD requirements, etc., and / or if the gap between the PRB (for SL HARQ-ACK feedback) and the common PRB is less than or equal to a specific level (for example, within 1 MHz or within a (pre-)configured PRB gap), the (corresponding) UE may omit the transmission of the common PRB.

[0344] Fig.16 A common PRB used to meet the PSD requirement according to one embodiment of the present disclosure is shown. Fig.16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0345] refer to Fig.16 , a common PRB, a first dedicated PRB, and a second dedicated PRB are shown in a frequency band of 1 MHz. For example, the first dedicated PRB and the second dedicated PRB may be resources for PSFCH transmission. For example, the common PRB, the first dedicated PRB, and the second dedicated PRB may be resources in an interleaved structure, although in Fig.16 Alternatively, for example, the common PRB may be a resource of a single interlace (eg, common interlace). For example, the first dedicated PRB and the second dedicated PRB may be PRBs included in the same interlace (eg, first interlace).

[0346] For example, Fig.16 As in the case of , if there are common PRBs and at least one PRB for PSFCH transmission (e.g., a first dedicated PRB and a second dedicated PRB) in a frequency band of 1 MHz, the transmitting UE can omit transmission through the common PRBs. In other words, in the above case, the transmitting UE can perform transmission only through at least one PRB for PSFCH transmission.

[0347] The above operations can be performed based on the features described in Table 18.

[0348] [Table 18]

[0349]

[0350] At the same time, when transmitting PSFCH, in addition to the PSFCH RBs (used for SL HARQ-ACK feedback), the UE may also use additional common RB-based interleaving for actual transmission. For example, depending on the multiple PSFCH combinations actually sent by the UE, the common RB-based interleaving may not be used for actual transmission, and / or only a subset of the RBs constituting the common RB-based interleaving may be used for actual transmission. For example, depending on the actual PSFCH RB positions, the positions of the RBs constituting the common RB-based interleaving used for transmission may be different.

[0351] For example, the maximum number of simultaneous PSFCH transmissions that can be sent may be different when the UE is sending a common RB-based interlace and when the UE is not sending.

[0352] For example, if the UE is capable of simultaneously transmitting up to N PSFCHs, the actual maximum number of PSFCHs that can be simultaneously transmitted may be changed to NM (eg, M is 1 or a specific value) when common RB-based interleaving is transmitted.

[0353] For example, when the UE selects a PSFCH to be transmitted, the UE may select a transmission target by giving priority to a combination of PSFCH transmissions that minimizes the number of RBs used to form a common RB-based interleaving to meet the OCB requirement over selection based on the priority of each PSFCH. Alternatively, for example, the selection of the transmission target may be performed by giving priority to a combination of PSFCH transmissions that minimizes the number of RBs used to form a common RB-based interleaving to meet the OCB requirement over selection based on the corresponding PSFCH priority. For example, the UE may select which PSFCHs to transmit based on the need for common RB-based interleaving and / or the number of RBs including the common RB-based interleaving whose transmission is required.

[0354] For example, the UE may allocate a minimum amount of the total transmit power (e.g., a (pre-)configured power value or a power value according to a (pre-)configured ratio) to each (actually transmitted) RB interlace based on a common RB or constituting an interlace based on a common RB, and distribute the remaining transmit power equally to PSFCH transmissions (for SL HARQ-ACK feedback).

[0355] On the other hand, the PSFCH to be transmitted by the UE may exist in multiple RB sets. For example, when the PSFCH transmissions that need to be transmitted simultaneously by the UE exist in multiple RB sets and / or when the channel sensing result for multiple RB sets is idle, the common RBs that meet the OCB requirements for the UE may be all or part of the RBs corresponding to the same interleaving index. For example, an RB (e.g., a common RB that meets the OCB requirements for the UE) may belong to multiple RB sets and / or a guard band between multiple RB sets.

[0356] For example, if the channel sensing result for some of the above RB sets is busy, when the UE sends the PSFCH, the RBs corresponding to the interlace in the guard band between the idle RB set and the busy RB set may not be used for transmission. For example, when the UE sends a PSFCH for all or part of the RBs corresponding to the interlace belonging to the guard band adjacent to the RB set and / or the RBs corresponding to the guard band adjacent to the RB set, the RB set existing in the shared COT among the RB sets whose channel sensing result is idle above may not be used for transmission. Alternatively, for example, in the case of the RB set existing in the shared COT among the RB sets whose channel sensing result is idle above, when the PSFCH is sent, all or part of the RBs corresponding to (or included in) the interlace belonging to the corresponding RB set and / or the guard band adjacent to the corresponding RB set may not be used by the UE.

[0357] For example, the PRB candidate set to which a PSFCH transmission (for SL HARQ-ACK feedback) may be mapped may be (pre-)configured to avoid (or exclude) PRBs corresponding to a common interlace and / or common PRBs.

[0358] In various embodiments of the present disclosure, in the case where the UE transmits PSFCH through COT sharing, the transmission of common RBs and / or interleaving based on common RBs may be omitted. For example, the UE may transmit common RBs and / or interleaving based on common RBs only when the UE transmits PSFCH according to the Type 1 Channel Access Procedure (CAP).

[0359] For example, when sending PSFCH, the UE may send using PRBs corresponding to a specific interlace. Here, for example, some PRBs (e.g., 1 or 2 RBs, or a smaller number of RBs) may be used for SL HARQ-ACK feedback. For example, (some) PRB positions may be derived from PSSCH resources corresponding to SL HARQ-ACK feedback. For example, the remaining PRBs (except for the PRBs corresponding to the specific interlace from which the above positions are derived) may be used for signal transmission unrelated to SL HARQ-ACK feedback. The above operation may be performed because if simultaneous transmission is performed through a specific interlace and a separate PRB with which FDM is performed, the PAPR may be increased, and / or performance degradation may occur when the transmit power is distributed according to PSD requirements.

[0360] For example, when the UE transmits PSFCH in an interlaced structure, the PSD of the PRB used for SL HARQ-ACK feedback and the PSD of other PRBs may be configured differently. For example, the PSD of the PRB used for SL HARQ-ACK feedback may be configured to be greater than the PSD used for other PRBs.

[0361] For example, the UE may determine the PRBs used for SL HARQ-ACK feedback based on its PSSCH resources (time slots and / or subchannels), and may use all or part of the interlace to which the PRBs belong for PSFCH transmission. For example, among the PRBs belonging to an interlace, the UE may exclude from PSFCH transmission the PRBs that the UE determines based on the received SCI to be used by another UE for the purpose of sending SL HARQ-ACK feedback.

[0362] On the other hand, because the PRBs used for SL HARQ-ACK feedback are different for different UEs, the SL HARQ-ACK feedback signaling and the common signaling for OCB requirements may overlap on the same PRBs, which may need to be handled separately to avoid resource conflicts.

[0363] For example, when the UE transmits PSFCH in an interleaved structure, the sequences mapped to the PRBs used for SL HARQ-ACK feedback and the sequences mapped to other PRBs may have different sequence ID values. For example, sequence ID values ​​may be (pre-)configured for the sequences used for SL HARQ-ACK feedback transmission and for other sequences (to meet OCB requirements).

[0364] For example, when the UE sends PSFCH in an interleaved structure, a sequence mapped to a PRB used for SL HARQ-ACK feedback may also be used to map to other PRBs.

[0365] For example, when a UE sends a PSFCH in an interlaced structure, the cyclic shift value of the PRB used for SL HARQ-ACK feedback (according to ACK or NACK) and the cyclic shift value applied to (or can be applied to) other PRBs can be distinguished. This can ensure that when the same PRB is used for SL HARQ-ACK feedback transmission by a specific UE and the same PRB is used for other purposes by another UE, different sequences are distinguished at least via CDM. For example, in the above, the UE can select a cyclic shift value combination for PRBs other than that used for SL HARQ-ACK feedback transmission so that the PAPR for PSFCH transmission is lower.

[0366] For example, the UE may expect that the candidate set of PRBs used for SL HARQ-ACK feedback may be (pre)configured to belong to a specific interlace. For example, a specific interlace may be used for PSFCH transmission by the UE. For example, the candidate set of PRBs used for SL HARQ-ACK feedback may be (pre)configured to belong to a specific interlace.

[0367] For example, when the UE sends the PSFCH in an interleaved structure, information on the number and / or PRB positions of the PRBs used for SL HARQ-ACK feedback may be (pre)configured. For example, if the number of PRBs used for SL HARQ-ACK feedback is multiple, the UE may derive the second PRB from the first PRB after selecting the first PRB from the PSSCH resource corresponding to the SL HARQ-ACK feedback, and / or derive multiple PRBs from the PSSCH resource. For example, at least 2 MHz may be covered from the lowest PRB to the highest PRB among the PRBs used for SL HARQ-ACK feedback.

[0368] On the other hand, it may be necessary to adjust the transmit power during sidelink transmission according to the PSD requirement. For example, after calculating the required sidelink transmit power, the actual sidelink transmit power may be reduced according to the PSD requirement (by the transmitting UE). For example, when adjusting the sidelink transmit power according to the above PSD requirement, the PSD may be maintained for PRBs belonging to the same subchannel or the same interlace or the same RB set. For example, when adjusting the sidelink transmit power according to the above PSD requirement, the PSD may be different in units of subchannel, units of interlace, or units of RB sets. For example, when adjusting the sidelink transmit power according to the above PSD requirement, the PSD may be different in units of PSFCH PRBs or PSFCH transmissions.

[0369] For example, after the required transmit power for simultaneous transmission of multiple PSFCHs that can be sent simultaneously and the number of PSFCHs that can be sent simultaneously have been calculated, the sidelink transmit power can be reduced according to the PSD requirement (by the UE). For example, after the required transmit power for a single PSFCH is calculated, and / or after the required transmit power for multiple PSFCH transmissions and the number of PSFCHs that can be sent simultaneously can be determined (by the UE), the sidelink transmit power can be reduced according to the PSD requirement (by the UE). For example, when the sidelink transmit power is adjusted according to the above-mentioned PSD requirement, the transmit power for multiple PSFCH transmissions can be reduced equally. For example, when the sidelink transmit power is adjusted according to the above-mentioned PSD requirement, the transmit power for multiple PSFCH transmissions can be reduced unequally in units of PSFCH transmissions and / or in units of RB sets.

[0370] For example, when calculating the transmit power requirement for sidelink transmission based on the PSD requirement, the UE may differently adjust and / or apply the nominal power (P0 value) and / or the additional offset value.

[0371] In various embodiments of the present disclosure, the RB index may be a PRB index, or may be a CRB index.

[0372] In various embodiments of the present disclosure, the scheme described for each SL channel is not limited to the respective stated SL channel and can be extended and applied to different SL channels.

[0373] In various embodiments of the present disclosure, various schemes may be differently applied according to the size of the subcarrier space.

[0374] In various embodiments of the present disclosure, various schemes may be differently applied according to the type of the side link channel.

[0375] In various embodiments of the present disclosure, various schemes may be differently applied according to a CAPC value and / or according to a SL priority value.

[0376] In various embodiments of the present disclosure, various schemes may be differently applied according to RB sets and / or according to the sizes of RB sets.

[0377] In various embodiments of the present disclosure, various schemes may be differently applied according to inside the COT and / or outside the COT.

[0378] The proposed method can be applied to the device described below. First, the processor 202 of the receiving UE can configure at least one BWP. Then, the processor 202 of the receiving UE can control the transceiver 206 of the receiving UE to receive the sidelink-related physical channel and / or the sidelink-related reference signal from the transmitting UE on at least one BWP.

[0379] According to one embodiment of the present disclosure, since OCB requirements can be met by using common PRBs, communication in unlicensed bands can be improved, and more reliable transmission operations based on HARQ feedback may be possible by prioritizing power allocated to PSFCH transmissions that have actual transmission significance.

[0380] Fig.17 A process for a first device to perform wireless communication according to an embodiment of the present disclosure is shown. Fig.17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0381] refer to Fig.17 In step S1710, the first device may obtain information related to a resource block (RB) set. For example, the RB set may include a physical sidelink feedback channel (PSFCH) resource, and the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz. In step S1720, the first device may send hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB and at least one common PRB included in a bandwidth of 1 MHz.

[0382] For example, the HARQ feedback information may be transmitted only through at least one dedicated PRB.

[0383] For example, at least one dedicated PRB may be included in the same interlace.

[0384] For example, the number of the at least one dedicated PRB may be 1, 2, or 5.

[0385] For example, at least one common PRB may be included in one interlace.

[0386] For example, multiple cyclic shifts may be used in multiple PSFCH transmissions with at least one dedicated PRB.

[0387] For example, the HARQ feedback information may not be transmitted through at least one common PRB.

[0388] For example, there may be a guard band between at least one dedicated PRB and at least one common PRB.

[0389] For example, in addition, the first device may determine that a total transmit power associated with the first device exceeds a maximum transmit power of the first device; and adjust a transmit power for sending hybrid automatic repeat request (HARQ) feedback information based on the PSFCH resource. For example, the transmit power associated with at least one common PRB may be reduced so that the total transmit power does not exceed the maximum transmit power.

[0390] For example, the maximum transmit power may be related to a power spectral density (PSD) requirement.

[0391] For example, the maximum transmit power may be 10 dBm.

[0392] For example, the HARQ feedback information may be associated with at least one physical sidelink shared channel (PSSCH) transmission.

[0393] For example, the HARQ feedback information may be sent based on a spacing between at least one dedicated PRB and at least one common PRB being greater than a threshold.

[0394] The above-described embodiments may be applied to various devices described below. First, the processor 102 of the first device 100 may obtain information related to a resource block (RB) set. For example, the RB set may include a physical sidelink feedback channel (PSFCH) resource, and the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz. Furthermore, the processor 102 of the first device 100 may control the transceiver 106 to send hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB and at least one common PRB included in a bandwidth of 1 MHz.

[0395] According to an embodiment of the present disclosure, a first device for performing wireless communication may be proposed. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation may include: obtaining information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is sent based on at least one dedicated PRB.

[0396] For example, the HARQ feedback information may be transmitted only through at least one dedicated PRB.

[0397] For example, at least one dedicated PRB may be included in the same interlace.

[0398] For example, the number of the at least one dedicated PRB may be 1, 2, or 5.

[0399] For example, at least one common PRB may be included in one interlace.

[0400] For example, multiple cyclic shifts may be used in multiple PSFCH transmissions with at least one dedicated PRB.

[0401] For example, the HARQ feedback information may not be transmitted through at least one common PRB.

[0402] For example, there may be a guard band between at least one dedicated PRB and at least one common PRB.

[0403] For example, in addition, the operation may further include: determining that a total transmit power associated with the first device exceeds a maximum transmit power of the first device; and adjusting a transmit power for sending hybrid automatic repeat request (HARQ) feedback information based on a PSFCH resource. For example, the transmit power associated with at least one common PRB may be reduced so that the total transmit power does not exceed the maximum transmit power.

[0404] For example, the maximum transmit power may be related to a power spectral density (PSD) requirement.

[0405] For example, the maximum transmit power may be 10 dBm.

[0406] For example, the HARQ feedback information may be associated with at least one physical sidelink shared channel (PSSCH) transmission.

[0407] For example, the HARQ feedback information may be sent based on a spacing between at least one dedicated PRB and at least one common PRB being greater than a threshold.

[0408] According to an embodiment of the present disclosure, a device adapted to control a first user equipment (UE) may be proposed. For example, the device may include: at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the first UE to perform operations based on being executed by the at least one processor. For example, the operation may include: obtaining information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is sent based on at least one dedicated PRB.

[0409] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be proposed. For example, the instructions may enable a first device to: obtain information related to a resource block (RB) set, wherein the RB set may include a physical sidelink feedback channel (PSFCH) resource, and wherein the PFSCH resource may include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, send hybrid automatic repeat request (HARQ) feedback information based on at least one dedicated PRB.

[0410] Fig.18 A process for a second device to perform wireless communication according to an embodiment of the present disclosure is shown. Fig.18 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0411] refer to Fig.18 , the second device may receive hybrid automatic repeat request (HARQ) feedback information from the first device based on at least one dedicated physical resource block (PRB). For example, based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, the HARQ feedback information may be sent based on at least one PRB from the first device, and the at least one dedicated PRB and the at least one common PRB may be included in a physical sidelink feedback channel (PSFCH) resource.

[0412] For example, the HARQ feedback information may be sent only through at least one dedicated PRB from the first device.

[0413] The above-mentioned embodiments may be applied to various devices described below. First, the processor 202 of the second device 200 may control the transceiver 206 to receive hybrid automatic repeat request (HARQ) feedback information from the first device 100 based on at least one dedicated physical resource block (PRB). For example, based on at least one dedicated PRB and at least one common PRB being included in a bandwidth of 1 MHz, HARQ feedback information may be sent based on at least one PRB from the first device 100, and at least one dedicated PRB and at least one common PRB may be included in a physical sidelink feedback channel (PSFCH) resource.

[0414] According to an embodiment of the present disclosure, a second device for performing wireless communication may be proposed. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory, which is operably connected to the at least one processor and stores instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation may include: receiving hybrid automatic repeat request (HARQ) feedback information from a first device based on at least one dedicated physical resource block (PRB), wherein at least one dedicated PRB and at least one common PRB are included in a bandwidth of 1 MHz, and HARQ feedback information may be sent based on at least one PRB from the first device, and wherein at least one dedicated PRB and at least one common PRB may be included in a physical sidelink feedback channel (PSFCH) resource.

[0415] For example, the HARQ feedback information may be sent only through at least one dedicated PRB from the first device.

[0416] Various embodiments of the present disclosure may be combined with each other.

[0417] Hereinafter, devices to which respective embodiments of the present disclosure can be applied will be described.

[0418] The various descriptions, functions, processes, proposals, methods and / or operation flows of the present disclosure described in this document may be applied to, but not limited to, various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0419] Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0420] Fig.19 A communication system ( 1 ) according to an embodiment of the present disclosure is shown. Fig.19The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0421] Reference Fig.19 , a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot (100a), a vehicle (100b-1, 100b-2), an extended reality (XR) device (100c), a handheld device (100d), a home appliance (100e), an Internet of Things (IoT) device (100f), and an artificial intelligence (AI) device / server (400). For example, a vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMDs), head up displays (HUDs) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device (200a) may operate as a BS / network node relative to other wireless devices.

[0422] Here, in addition to LTE, NR and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may also include a narrowband Internet of Things for low-power communication. In this case, for example, the NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology, and may be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology may be an example of an LPWAN, and may be referred to as various names including enhanced machine type communication (eMTC), etc. For example, the LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low power wide area network (LPWAN), and ZigBee considering low power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a personal area network (PAN) related to small / low power digital communication based on various standards including IEEE 802.15.4, etc., and may be referred to by various names.

[0423] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0424] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS 200 or BS200 / BS 200. Here, the wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b may send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of a resource allocation process may be performed based on various proposals of the present disclosure.

[0425] Fig. 20 A wireless device according to an embodiment of the present disclosure is shown. Fig. 20 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0426] Reference Fig. 20 , the first wireless device (100) and the second wireless device (200) may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Fig.19 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0427] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and / or one or more antennas 108. The (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then send a radio signal including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive a radio signal including second information / signals through the transceiver 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102, and may store various information related to the operation of the (one or more) processors 102. For example, the memory (s) 104 may store software code including commands for executing part or all of the processing controlled by the processor (s) 102 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, the processor (s) 102 and the memory (s) 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver (s) 106 may be connected to the processor (s) 102 and transmit and / or receive radio signals through the antenna (s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver (s) 106 may be used interchangeably with the radio frequency (RF) unit (s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0428] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then send a radio signal including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive a radio signal including fourth information / signals through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, the memory (s) 204 may store software code including commands for executing part or all of the processing controlled by the processor (s) 202 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, the processor (s) 202 and the memory (s) 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver (s) 206 may be connected to the processor (s) 202 and transmit and / or receive radio signals through the antenna (s) 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver (s) 206 may be used interchangeably with the RF unit (s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0429] Below, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the description, function, process, proposal, method, and / or operation flow disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0430] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0431] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0432] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the method and / or operation flow of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the description, function, process, proposal, method, and / or operation flow disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and may send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flows disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0433] Fig.21 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Fig.21 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0434] Reference Fig.21 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). Fig.21 Operation / function, not limited to Fig. 20The processor (102, 202) and / or transceiver (106, 206) of Fig. 20 The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.21 For example, you can Fig. 20 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig. 20 The processor (102, 202) implements blocks 1010 to 1050 and can be Fig. 20 The transceiver (106, 206) is used to implement block 1060.

[0435] Can be through Fig.21 The signal processing circuit (1000) converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0436] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbol. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0437] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0438] Can Fig.21 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. For example, the wireless device (e.g., Fig. 20 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0439] Fig. 22 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to the use case / service (refer to Fig.19 ). Fig. 22 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0440] Reference Fig. 22 , the wireless device (100, 200) may correspond to Fig. 20 The wireless devices (100, 200) may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130) and additional components (140). The communication unit may include a communication circuit (112) and (one or more) transceivers (114). For example, the communication circuit (112) may include Fig. 20 One or more processors (102, 202) and / or one or more memories (104, 204) of the present invention. For example, the transceiver(s) (114) may include Fig. 20The control unit (120) is electrically connected to the communication unit (110), the memory (130) and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). The control unit (120) can send information stored in the memory unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the memory unit (130).

[0441] The additional component (140) may be configured in various ways depending on the type of the wireless device. For example, the additional component (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.19 100a), vehicles ( Fig.19 100b-1 and 100b-2), XR devices ( Fig.19 100c), handheld devices ( Fig.19 100d), household appliances ( Fig.19 100e), IoT devices ( Fig.19 100f), digital broadcasting terminals, hologram equipment, public safety equipment, MTC equipment, medical equipment, fintech equipment (or financial equipment), security equipment, climate / environmental equipment, AI servers / equipment ( Fig.19 400), BS ( Fig.19 200), network nodes, etc. Depending on the use case / service, wireless devices can be used in mobile or fixed places.

[0442] exist Fig. 22In the wireless device (100, 200), all the various elements, components, units / parts and / or modules in the wireless device (100, 200) can be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected by wire, and the control unit (120) and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or combinations thereof.

[0443] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig. 22 .

[0444] Fig.23 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Fig.23 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0445] Reference Fig.23 The handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b) and an I / O unit (140c). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to Fig. 22 Frame 110 to 130 / 140.

[0446] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The memory unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and include a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c may input or output video information / signals, audio information / signals, data and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker and / or a tactile module.

[0447] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the memory unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals, and directly send the converted radio signals to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the memory unit 130, and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0448] Fig.24 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle may be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Fig.24 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0449] Reference Fig.24 The vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a drive unit (140a), a power supply unit (140b), a sensor unit (140c) and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to Fig. 22Frame 110 / 130 / 140.

[0450] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may 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 drive unit 140a may cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path with a destination set, and the like.

[0451] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically acquire the most recent traffic information data from an external server and acquire surrounding traffic information data from adjacent vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data using AI technology, etc. based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0452] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising: Get information related to a resource block (RB) set, The RB set includes a physical sidelink feedback channel (PSFCH) resource, and The PFSCH resources include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and Based on the at least one dedicated PRB and the at least one common PRB being included in the bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is transmitted based on the at least one dedicated PRB.

2. The method according to claim 1, wherein: The HARQ feedback information is sent only through the at least one dedicated PRB.

3. The method according to claim 1, wherein: The at least one dedicated PRB is included in the same interlace.

4. The method according to claim 1, wherein: The number of the at least one dedicated PRB is 1, 2 or 5.

5. The method according to claim 1, wherein: The at least one common PRB is included in one interlace.

6. The method according to claim 1, wherein: A plurality of cyclic shifts are used in a plurality of PSFCH transmissions through the at least one dedicated PRB.

7. The method according to claim 1, wherein: The HARQ feedback information is not sent through the at least one common PRB.

8. The method according to claim 1, wherein: A guard band exists between the at least one dedicated PRB and the at least one common PRB.

9. The method according to claim 1, further comprising: determining that a total transmit power associated with the first device exceeds a maximum transmit power of the first device; as well as adjusting a transmit power for sending hybrid automatic repeat request (HARQ) feedback information based on the PSFCH resource, The transmit power associated with the at least one common PRB is reduced so that the total transmit power does not exceed the maximum transmit power.

10. The method according to claim 9, wherein: The maximum transmit power is related to the power spectral density (PSD) requirement.

11. The method according to claim 9, wherein: The maximum transmission power is 10dBm.

12. The method according to claim 1, wherein: The HARQ feedback information is associated with at least one physical sidelink shared channel (PSSCH) transmission.

13. The method according to claim 1, wherein: The HARQ feedback information is sent based on a spacing between the at least one dedicated PRB and the at least one common PRB being greater than a threshold.

14. A first device for performing wireless communication, the first device comprising: at least one transceiver; at least one processor; as well as at least one memory operably connected to the at least one processor and storing instructions that, upon execution by the at least one processor, cause the first device to perform operations, The operations include: Get information related to a resource block (RB) set, The RB set includes a physical sidelink feedback channel (PSFCH) resource, and The PFSCH resources include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and Based on the at least one dedicated PRB and the at least one common PRB being included in the bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is transmitted based on the at least one dedicated PRB.

15. A device adapted to control a first user equipment (UE), the device comprising: at least one processor; as well as at least one memory operably connected to the at least one processor and storing instructions that, upon execution by the at least one processor, cause the first UE to perform operations, The operations include: Get information related to a resource block (RB) set, The RB set includes a physical sidelink feedback channel (PSFCH) resource, and The PFSCH resources include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and Based on the at least one dedicated PRB and the at least one common PRB being included in the bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is transmitted based on the at least one dedicated PRB.

16. A non-transitory computer-readable storage medium storing instructions that upon being executed cause a first device to: Get information related to a resource block (RB) set, in, The RB set includes a physical sidelink feedback channel (PSFCH) resource, and The PFSCH resources include at least one dedicated physical resource block (PRB) and at least one common PRB included in a bandwidth of 1 MHz; and Based on the at least one dedicated PRB and the at least one common PRB being included in the bandwidth of 1 MHz, hybrid automatic repeat request (HARQ) feedback information is transmitted based on the at least one dedicated PRB.

17. A method for performing wireless communication by a second device, the method comprising: receiving hybrid automatic repeat request (HARQ) feedback information from a first device based on at least one dedicated physical resource block (PRB), wherein, based on the at least one dedicated PRB and the at least one common PRB being included in a bandwidth of 1 MHz, the HARQ feedback information is sent based on the at least one PRB from the first device, and The at least one dedicated PRB and the at least one common PRB are included in a physical sidelink feedback channel (PSFCH) resource.

18. The method according to claim 17, wherein: The HARQ feedback information is sent only through the at least one dedicated PRB from the first device.

19. A second device for performing wireless communication, the second device comprising: at least one transceiver; at least one processor; as well as at least one memory operably connected to the at least one processor and storing instructions that, upon execution by the at least one processor, cause the second device to perform operations, The operations include: receiving hybrid automatic repeat request (HARQ) feedback information from a first device based on at least one dedicated physical resource block (PRB), wherein, based on the at least one dedicated PRB and the at least one common PRB being included in a bandwidth of 1 MHz, the HARQ feedback information is sent based on the at least one PRB from the first device, and The at least one dedicated PRB and the at least one common PRB are included in a physical sidelink feedback channel (PSFCH) resource.

20. The second device according to claim 19, wherein: The HARQ feedback information is sent only through the at least one dedicated PRB from the first device.

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