Method and apparatus for performing beam-based communication in wireless communication system

Abstract

A method for a first device to perform wireless communication and a device supporting the same are provided. The method may comprise the steps of: transmitting control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; detecting beam failure; triggering beam failure recovery based on the detected beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK on the basis of the trigger of beam failure recovery.

Description

Technical Field

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

[0002] 5G NR is the successor to Long Term Evolution (LTE) and is a new mobile communications system with features such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, including low-frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

[0003] The 6G (wireless communication) system has goals such as (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption for battery-less IoT devices, (vi) ultra-reliable connectivity, and (vii) networked intelligence with machine learning capabilities. The vision of the 6G system can include four aspects such as intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity. The 6G system can meet the requirements shown in Table 1 below. In other words, Table 1 shows the requirements of the 6G system.

[0004] [Table 1]

[0005] Peak data rate per device 1Tbps E2E latency 1ms Maximum spectral efficiency 100bps / Hz Mobility support Up to 1000km / h Satellite Integration completely AI completely autonomous vehicles completely XR completely Tactile communication completely Summary of the Invention

[0006] Technical issues

[0007] The present disclosure provides a method and apparatus capable of effectively providing services in a wireless communication system. Specifically, the present disclosure provides a method and apparatus for beam-based communication.

[0008] Technical Solution

[0009] Based on an embodiment, a method for performing wireless communication by a first device may be provided. The method may include the following steps: transmitting control information for scheduling a physical shared channel on a physical control channel; transmitting data on the physical shared channel; detecting beam failure; triggering beam failure recovery based on the detection of beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0010] Based on an embodiment, a first device adapted to perform wireless communication may be provided. The first device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, and the instructions, upon being executed by the at least one processor, may cause the first device to perform operations including: sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; detecting beam failure; triggering beam failure recovery based on the detection of beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0011] Based on an embodiment, a processing device adapted to control a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, wherein the instructions, upon being executed by the at least one processor, may cause the first device to perform operations including: transmitting control information for scheduling a physical shared channel on a physical control channel; transmitting data on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0012] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions, upon being executed, may cause a first apparatus to perform operations including: transmitting control information for scheduling a physical shared channel on a physical control channel; transmitting data on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0013] Based on an embodiment, a method for performing wireless communication by a second device may be provided. The method may include the following steps: receiving control information for scheduling a physical shared channel from a first device on a physical control channel; receiving data from the first device on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0014] Based on the embodiment, a second device suitable for performing wireless communication may be provided. The second device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, and the instructions, upon being executed by the at least one processor, may cause the second device to perform operations, the operations including: receiving control information for scheduling a physical shared channel from a first device on a physical control channel; receiving data from the first device on a physical shared channel; detecting beam failure; triggering beam failure recovery based on the detection of beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0015] Based on the embodiment, a processing device suitable for controlling a second device may be provided. For example, the processing device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, and the instructions, upon being executed by the at least one processor, may cause the second device to perform operations, the operations including: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0016] Based on an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions, upon being executed, may cause a second device to perform operations including: receiving control information for scheduling a physical shared channel from a first device on a physical control channel; receiving data from the first device on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0017] Beneficial effects

[0018] The present disclosure may provide methods and apparatuses that can effectively provide services in a wireless communication system. For example, through the embodiments proposed in the present disclosure, beam-based communication can be efficiently performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The following illustrates a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure.

[0020] Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown.

[0021] Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown.

[0022] Figure 4 An example of a typical NTN scenario based on regenerated payload according to an embodiment of the present disclosure is shown.

[0023] Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown.

[0024] Figure 6 The structure of a time slot of a frame according to an embodiment of the present disclosure is shown.

[0025] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0026] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation pattern according to an embodiment of the present disclosure is shown.

[0027] Figure 9 An example of a wireless communication environment according to an embodiment of the present disclosure is shown.

[0028] Figure 10 A beam failure recovery process according to an embodiment of the present disclosure is shown.

[0029] Figure 11 A process related to feedback information of a channel associated with beam failure recovery according to an embodiment of the present disclosure is shown.

[0030] Figure 12 A method for a first device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0031] Figure 13 A method for a second device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0032] Figure 14 A communication system 1 according to an embodiment of the present disclosure is shown.

[0033] Figure 15 A wireless device according to an embodiment of the present disclosure is shown.

[0034] Figure 16 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0035] Figure 17 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0036] Figure 18 A handheld device according to an embodiment of the present disclosure is shown.

[0037] Figure 19 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0039] As used in this disclosure, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Thus, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0040] 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”.

[0041] 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.”

[0042] In addition, the brackets used in the present disclosure may mean "for example". Specifically, when it is indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when it is indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0043] In the following description, “when, if, or in the event of” may be replaced with “based on”.

[0044] The technical features respectively described in one drawing in the present disclosure may be implemented separately or may be implemented simultaneously.

[0045] In the present disclosure, a high-layer parameter may be a parameter configured, preconfigured, or predefined for a UE. For example, a base station or a network may send the high-layer parameter to the UE. For example, the high-layer parameter may be sent via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0046] In the present disclosure, “configuration / configured or defined / defined” may be interpreted as being configured or pre-configured for a device through predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In the present disclosure, “configuration / configured or defined / defined” may be interpreted as being pre-configured for a device.

[0047] 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), and the like. 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), Long Term Evolution (LTE), 5G NR, and the like.

[0048] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, the 6G system may have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine type communication (mMTC), artificial intelligence (AI) integrated communication, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0049] Figure 1 The following illustrates a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0050] In 6G, new network features can be as follows.

[0051] -Satellite integrated network

[0052] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is innovative, and wireless evolution may be updated from "connected things" to "connected intelligence." AI can be applied at every step of the communication process (or every signal processing process described below).

[0053] -Seamless integration of wireless information and energy transfer.

[0054] -Ubiquitous Hyper-3D Connectivity: Access to networks and core network functions from drones and very low Earth orbit satellites will establish hyper-3D connectivity in 6G ubiquity.

[0055] Among the new network features of 6G, several general requirements are as follows.

[0056] -Small cell network

[0057] -Ultra-dense heterogeneous network

[0058] - High capacity backhaul

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

[0060] -Software and virtualization.

[0061] The following describes the core implementation technologies of the 6G system.

[0062] Artificial Intelligence (AI): When AI is introduced into communications, real-time data transmission can be simplified and improved. AI can use countless analyses to determine how to perform complex target tasks. This means AI can increase efficiency and reduce processing latency. Time-consuming operations such as handovers, network selection, and resource scheduling can be performed instantly with AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communications. Furthermore, AI could enable instant communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, intelligent cognitive radios, self-maintaining wireless networks, and machine learning.

[0063] -THz communication: Data rates can be increased by increasing bandwidth. This can be achieved by using sub-TH communication with wide bandwidth and applying advanced massive MIMO technology. THz waves are called submillimeter radiation, generally indicating a frequency band between 0.1THz and 10THz with corresponding wavelengths in the range of 0.03mm to 3mm. The band range of 100GHz to 300GHz (sub-THz band) is considered to be the main part of the THz band for cellular communications. When the sub-THz band is added to the millimeter wave band, the 6G cellular communication capacity increases. The defined THz band of 300GHz to 3THz is in the far infrared (IR) band. The band of 300GHz to 3THz is part of the optical band, but is located at the boundary of the optical band and immediately after the RF band. Therefore, the band of 300GHz to 3THz has similarities with RF. Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure can be combined with various embodiments of the present disclosure. The main features of THz communication include (i) a wide range of bandwidths that can be used to support very high data rates; and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth generated in highly directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated with devices and base stations operating in this band. Therefore, advanced adaptive placement techniques that can overcome range limitations can be used.

[0064] - Massive MIMO technology (Large MIMO)

[0065] -Holographic Beamforming (HBF)

[0066] -Optical wireless technology

[0067] -Free Space Optical (FSO) Backhaul Network

[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] Unmanned Aerial Vehicles (UAVs): UAVs, or drones, will be a key factor in 6G wireless communications. In most cases, UAV technology can provide high-speed data wireless connectivity. A base station (BS) entity is installed within the UAV to provide cellular connectivity. UAVs offer certain features not found in fixed BS infrastructure, such as ease of deployment, robust line-of-sight links, and the freedom of mobility control. During emergencies such as natural disasters, deploying terrestrial telecommunications infrastructure is economically unfeasible and sometimes unable to provide services in turbulent environments. UAVs can easily handle such situations. UAVs will become a new paradigm in wireless communications. This technology facilitates the three fundamental requirements of wireless networks, such as eMBB, URLLC, and mMTC. UAVs can also serve a variety of purposes, such as improving network connectivity, fire detection, disaster response services, security and monitoring, pollution monitoring, parking monitoring, and accident detection. Therefore, UAV technology is recognized as one of the most important technologies for 6G communications.

[0078] -Advanced Air Mobility (AAM): AAM is a general concept of Urban Air Mobility (UAM), which is air transportation that can be used in urban areas and can refer to transportation tools including movement between urban areas and regional hubs.

[0079] -Autonomous driving (self-driving): Vehicle-to-everything (V2X) is a core element for building autonomous driving infrastructure. It can be a technology that allows vehicles to communicate and share information with various road elements, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I). To maximize the performance of autonomous driving and ensure high safety, high transmission speeds and low latency technologies are essential. In the future, autonomous driving may need to go beyond delivering warnings or guidance messages to the driver and actively intervene in vehicle operations and directly control the vehicle in dangerous situations. To this end, since the amount of information that needs to be sent and received may be enormous, autonomous driving is expected to be maximized in 6G, which has higher transmission speeds and lower latency than 5G.

[0080] - Non-terrestrial network (NTN): NTN may refer to a network or network segment that utilizes radio frequency (RF) resources on a satellite (or unmanned aerial system (UAS) platform). Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown. Figure 4 An example of a typical NTN scenario based on regeneration payload according to an embodiment of the present disclosure is shown. Figure 3 or Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Figure 3 , a satellite (or UAS platform) can establish a service link with the UE. The satellite (or UAS platform) can be connected to the gateway via a feeder link. The satellite can be connected to the data network via the gateway. The beam coverage area can refer to the area where the signal sent by the satellite can be received. Figure 4 , a satellite (or UAS platform) can establish a service link with the UE. The satellite (or UAS platform) connected to the UE can be connected to another satellite (or another UAS platform) via an inter-satellite link (ISL). The other satellite (or another UAS platform) can be connected to the gateway via a feeder link. Based on the regenerative payload, the satellite can be connected to the data network through the gateway and another satellite. If there is no ISL between the satellite and the other satellite, a feeder link between the satellite and the gateway may be required. Figure 3 and Figure 4 This is only an example of an NTN scenario, and NTN can be implemented based on various types of scenarios. For example, a satellite (or UAS platform) can implement a transparent or regenerative (with on-board processing) payload. For example, a satellite (or UAS platform) can generate multiple beams over a specified service area based on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) can vary according to the on-board antenna pattern and minimum elevation angle. For example, a transparent payload may include RF filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be changed. For example, a regenerative payload may include RF filtering, frequency conversion and amplification, demodulation / decryption, switching and / or routing, and coding / modulation. For example, a regenerative payload may be substantially equivalent to equipping a satellite (or UAS platform) with all or part of the base station functionality.

[0081] Integrated Sensing and Communications (ISAC): Wireless sensing is a technology enabler for acquiring information about the characteristics of the environment and / or objects within it, using radio frequency to determine, for example, the distance (range), angle, or instantaneous linear velocity of an object. RF sensing capabilities can provide services for device-free object positioning, as objects do not need to be connected via a device in the network. The ability to obtain range, velocity, and angle information from RF signals can provide a wide range of new capabilities, such as various object detection and object identification (e.g., vehicles, people, animals, drones), as well as high-precision positioning, tracking, and activity recognition. For example, wireless sensing services can provide input to various verticals (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle maneuvering and navigation, trajectory tracking, collision avoidance, traffic management, and health and activity monitoring. In some cases, wireless sensing can also use non-3GPP sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services (i.e., sensing operations) can rely on processing the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing may have the opportunity to enhance the traditional system from a communication network to a wireless communication and sensing network. Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 5 (a) shows an example of sensing with a co-located sensing receiver and sensing transmitter (eg, monostatic sensing), and Figure 5 (b) shows an example of sensing with separate sensing receivers and sensing transmitters (eg, bistatic sensing).

[0082] The radio interface protocol layers between the UE and the network can be categorized as Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the lower three layers of the Open Systems Interconnection (OSI) model, which is well known in communication systems. The physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, and the radio resource control (RRC) layer, located at Layer 3, controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the base station layer.

[0083] The physical layer provides information transfer services to upper layers via physical channels. The physical layer is connected to the media access control (MAC) layer, its upper layer, via transport channels. Data is transferred between the MAC and physical layers via transport channels. Transport channels are categorized based on how data is transmitted over the radio interface and the characteristics of the data being transmitted.

[0084] Data is transmitted between different physical layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0085] The MAC layer provides services to the Radio Link Control (RLC) layer, a higher layer above the MAC layer, via logical channels. The MAC layer maps multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services via logical channels.

[0086] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure the different quality of service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0087] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of resource allocation (RBs). RBs are logical paths for data transfer between the UE and the network, provided by Layer 1 (i.e., the physical or PHY layer) and Layer 2 (i.e., the MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP), and Service Data Adaptation Protocol (SDAP) layers).

[0088] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0089] 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.

[0090] RB configuration refers to the process of specifying radio protocol layers and channel attributes to provide a specific service and determining corresponding detailed parameters and operation methods. RBs can be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane, and DRBs are used as a path for transmitting user data in the user plane.

[0091] 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 its connection with the core network while releasing its connection with the BS.

[0092] Data is sent from the network to the UE via a downlink transport channel. Examples of downlink transport channels include a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting other user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent via the downlink SCH or may be sent via a separate downlink multicast channel (MCH). In addition, uplink transport channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user traffic or control messages.

[0093] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0094] A radio frame can be used to perform uplink and downlink transmissions. A radio frame has a length of 10 ms and can be defined as consisting of two half frames (HFs). A half frame can include five 1 ms subframes (SFs). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined by the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0095] When using a normal CP, each time slot can include 14 symbols. When using an extended CP, each time slot can 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).

[0096] Table 2 shown below shows the number of symbols (N) per slot based on the SCS configuration (μ) in the case of using a normal CP or an extended CP. slot symb ), the number of time slots per frame (N frame,μslot ) and the number of time slots per subframe (N subframe ,μ slot ).

[0097] [Table 2]

[0098]

[0099] Figure 6 The 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.

[0100] Reference Figure 6 , a time slot includes multiple symbols in the time domain. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as a plurality of consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as a plurality of consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via activated BWPs. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0101] A bandwidth part (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.

[0102] 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. Figure 7 In an embodiment of the present invention, the number of BWPs is 3.

[0103] Reference Figure 7 , Common Resource Blocks (CRBs) may be carrier resource blocks numbered from one end of the carrier frequency band to the other. Additionally, PRBs may be resource blocks numbered within each BWP. Point A may indicate a common reference point for the resource block grid.

[0104] 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 can be an external reference point of the PRBs of a carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0105] The side link synchronization signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as a side link (SL) specific sequence. 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.

[0106] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known by the UE before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource 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 can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0107] 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.

[0108] In the present disclosure, PSCCH may be replaced by a control channel, a physical control channel, a control channel associated with a sidelink, a physical control channel associated with a sidelink, etc. In the present disclosure, PSSCH may be replaced by a shared channel, a physical shared channel, a shared channel associated with a sidelink, a physical shared channel associated with a sidelink, etc.

[0109] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation 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.

[0110] Reference Figure 8 (a), in 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 the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources used to report SL HARQ feedback to the base station.

[0111] 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 configured / allocated to the first UE by the base station through downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources configured / allocated to the first UE by the base station 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.

[0112] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or first-level SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH (e.g., second-level SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report the HARQ feedback information to the base station via 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.

[0113] Reference Figure 8 (b) in 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 a 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, which has selected resources from the resource pool by itself, may send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., a second-level 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.

[0114] Reference Figure 8(a) or (b), for example, the first UE may send the SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., level 2 SCIs) to the second UE via the PSCCH and / or PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., level 2 SCIs) to receive the PSSCH from the first UE. In the present disclosure, the SCI sent via the PSCCH may be referred to as the first SCI, the first SCI, the first level SCI, or the first level SCI format, and the SCI sent via the PSSCH may be referred to as the second SCI, the second SCI, the second level SCI, or the second level SCI format.

[0115] Reference 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 use the PSFCH resources to send HARQ feedback to the first UE.

[0116] Reference Figure 8 (a), in step S840, the first UE may send SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0117] Figure 9 An example of a wireless communication environment according to an embodiment of the present disclosure is shown. Figure 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0118] Reference Figure 9 , a first device (910), a second device (920), and a third device (930) are shown as a part of a device using a wireless channel in a wireless communication system. Figure 9 Only one first device (910), one second device (920), and one third device (930) are shown, but are not limited thereto.

[0119] According to the present disclosure, the first device (910), the second device (920) and / or the third device (930) can transmit and receive wireless signals in the millimeter wave (mmWave) frequency band. For example, in order to improve channel gain, the first device (910), the second device (920) and / or the third device (930) can perform beamforming. Here, beamforming can include transmit beamforming and receive beamforming. For example, the first device (910), the second device (920) and / or the third device (930) can provide directionality to the transmitted signal or the received signal. For example, the first device (910), the second device (920) and / or the third device (930) can select a service beam (912, 913, 921, 931) through a beam search or beam management process. After selecting the service beam (912, 913, 921, 931), communication can be performed through a resource that is quasi-co-located (QCL) with the resource that transmits the service beam.

[0120] According to the present disclosure, the first device (910), the second device (920), and / or the third device (930) may include an antenna array. Each antenna included in the antenna array may be referred to as an array element or an antenna element. The antenna array may be configured in various forms, such as a linear array or a multi-layer array. The antenna array may be referred to as a large-scale antenna array. For example, the antenna array may include multiple sub-arrays, each sub-array including multiple antenna elements.

[0121] For example, beam management operations in millimeter wave frequencies have recently been introduced into conventional NR Uu (operations between base stations and UEs). For example, beam management operations may include beam scheduling, beam selection, beam failure recovery, etc. In the present disclosure, beam management operations (e.g., beam failure recovery) are proposed as follows. For example, the following proposals may relate to beam management operations in NR. In addition, the following proposals are not limited to NR. For example, the following proposals may relate to beam management operations in the side link. In addition, the following proposals are not limited to the side link. For example, the following proposals may relate to beam management operations in the NR side link.

[0122] The UE may perform FR2 (millimeter wave frequency-based communication) operations based on the following operations. For example, FR2 may be sidelink FR2. For example, sidelink FR2 may refer to sidelink-based communication using sidelink millimeter wave frequencies. In addition, the following operations are not limited to sidelink FR2. The present disclosure is not limited to sidelink FR2. For example, the present disclosure may be applicable to 5G FR2 or beyond 5G FR2 (e.g., 6G FR2).

[0123] -Beam scanning operation: The UE may perform an operation by scanning beams used for communication to find the best beam (e.g., transmit beam, receive beam). For example, communication during the beam scanning operation may be sidelink communication.

[0124] -Beam measurement operation: The UE may perform an operation to find a reference signal (RS) whose measurement value exceeds a threshold when measuring an RS transmitted by a peer UE.

[0125] -Beam selection operation: The UE may perform an operation to select the best beam (eg, transmit beam, receive beam) based on beam measurement results.

[0126] -Beam reporting operation: The UE may perform an operation to report the selected best beam to a peer UE or a base station.

[0127] Figure 10 A beam failure recovery process according to an embodiment of the present disclosure is shown. Figure 10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0128] Reference Figure 10 , when the UE has detected that the failure of the beam used for communication is greater than or equal to a threshold, the UE may trigger a beam failure recovery process to recover the beam. For example, when the UE has detected that the failure of the beam used for sidelink communication is greater than or equal to a threshold, the UE may trigger a sidelink beam failure recovery process to recover the beam. For example, when the beam failure instance that the MAC layer of the UE has received from the physical layer is greater than or equal to a threshold, the UE may trigger a beam failure recovery process to recover the beam. For example, the MAC layer of the UE may execute a process of triggering a beam failure recovery process to recover the beam. For example, when the beam failure instance that the MAC layer of the UE has received from the physical layer is greater than or equal to a threshold, the UE may trigger a sidelink beam failure recovery process to recover the beam. For example, the MAC layer of the UE may execute a process of triggering a sidelink beam failure recovery process to recover the beam. The present disclosure has been described with respect to sidelink beam failure, but is not limited thereto. For example, the present disclosure may be applied not only to sidelink beam failure, but also to beam failures other than sidelink beam failure.

[0129] exist Figure 10For example, the MAC layer may be configured by the RRC with a beam failure recovery procedure for indicating when a beam failure is detected. For example, beam failure may be detected by counting beam failure instance indications from a lower layer to the MAC entity. For example, the RRC may configure a beam failure instance maximum count and a beam failure detection timer. For example, if a beam failure instance indication has been received from a lower layer, the MAC entity may start or restart a beam failure detection timer. For example, if a beam failure instance indication has been received from a lower layer, the MAC entity may increment the beam failure instance counter by 1. For example, if the beam failure instance counter is greater than or equal to the beam failure instance maximum count, the MAC entity may detect a beam failure. For example, if the beam failure instance counter is greater than or equal to the beam failure instance maximum count, the MAC entity may trigger beam failure recovery. For example, if the beam failure detection timer expires, the MAC entity may set the beam failure instance counter to zero.

[0130] The transmitting UE may create a grant for data transmission. For example, the transmitting UE may create a sidelink grant for sidelink data transmission. The transmitting UE may select and reserve initial transmission resources and retransmission resources together when generating or selecting transmission resources, and indicate the reserved transmission resource information in the control information to transmit it to the receiving UE. For example, the transmitting UE may select and reserve initial transmission resources and retransmission resources together when generating or selecting transmission resources, and indicate the reserved transmission resource information in the sidelink control information (SCI) to transmit it to the receiving UE. If the transmitting UE has detected a beam failure once or above a threshold during data transmission, the transmitting UE may not use the transmission resources indicated by the control information (or the transmission resources reserved or selected before being indicated to the receiving UE by the control information). For example, if the transmitting UE detects a sidelink beam failure once or above a threshold during sidelink data transmission, the transmitting UE may not use the transmission resources indicated by the SCI (or the transmission resources reserved or selected before being indicated to the receiving UE by the SCI). If the transmitting UE has detected a beam failure once or above a threshold during data transmission, the transmitting UE may skip transmission using the transmission resources indicated by the control information. For example, if the transmitting UE detects that the sidelink beam fails once or is above a threshold during sidelink data transmission, the transmitting UE may skip transmission using the transmission resources indicated by the SCI. For example, the transmitting UE may skip transmission (retransmission) on subsequent transmission (retransmission) resources indicated by the control information. For example, the transmitting UE may skip transmission (retransmission) on subsequent transmission (retransmission) resources indicated by the SCI. For example, the transmitting UE may release a grant associated with the subsequent transmission (retransmission) resources indicated by the control information. For example, the transmitting UE may release a sidelink grant associated with the subsequent transmission (retransmission) resources indicated by the SCI.

[0131] According to the present disclosure, if a transmitting UE receives a beam failure recovery (BFR) MAC CE from a receiving UE before future resources reserved by control information arrive, or if beam failure recovery (BFR) (or BFR MAC CE) is triggered (for example, when the UE receives the BFR MAC CE from a peer UE or triggers the BFR procedure based on the UE's own reference signal measurement), the transmitting UE may not use the transmission resources indicated by the control information (or the transmission resources reserved or selected before being indicated to the receiving UE via the control information). For example, if a transmitting UE receives a BFR MAC CE from a receiving UE before future resources scheduled by an SCI arrive, or if BFR (or BFR MAC CE) is triggered (for example, when the UE receives the BFR MAC CE from a peer UE or triggers the BFR procedure based on the UE's own reference signal measurement), the transmitting UE may not use the transmission resources indicated by the SCI (or the transmission resources reserved or selected before being indicated to the receiving UE via the SCI). If the transmitting UE receives a BFR MAC CE from the receiving UE before the arrival of future resources reserved via control information, or if BFR (or BFR MAC CE) is triggered (e.g., when the UE receives a BFR MAC CE from a peer UE or when the BFR procedure is triggered based on the UE's own reference signal measurement), the transmitting UE may skip transmission using the resources indicated by the control information. For example, if the transmitting UE receives a BFR MAC CE from the receiving UE before the arrival of future resources scheduled via SCI, or if BFR (or BFR MAC CE) is triggered (e.g., when the UE receives a BFR MAC CE from a peer UE or when the BFR procedure is triggered based on the UE's own reference signal measurement), the transmitting UE may skip transmission using the transmission resources indicated by SCI. For example, the transmitting UE may skip transmission (retransmission) on the subsequent transmission (retransmission) resources indicated by the control information. For example, the transmitting UE may skip transmission (retransmission) on the subsequent transmission (retransmission) resources indicated by SCI. For example, the transmitting UE may release a grant associated with the subsequent transmission (retransmission) resources indicated by the control information. For example, the transmitting UE may release the sidelink grant associated with the subsequent (re)transmission resources indicated by the SCI.

[0132] BFR detection can be used to enhance the communication system. To avoid unnecessary resource allocation, failure to receive feedback on the physical feedback channel can be regarded as an ACK.

[0133] Figure 11 A process related to feedback information of a channel associated with beam failure recovery according to an embodiment of the present disclosure is shown. Figure 11The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0134] Reference Figure 11 , the sending UE can create a grant for data transmission. For example, the sending UE can create a sidelink grant for sidelink data transmission. The sending UE can select and reserve initial transmission resources and retransmission resources at the same time when generating or selecting transmission resources, and indicate the reserved transmission resource information to the receiving UE in the control information. For example, the sending UE can select and reserve initial transmission resources and retransmission resources at the same time when generating or selecting transmission resources, and indicate the reserved transmission resource information to the receiving UE in the sidelink control information (SCI). The sending UE can use the reserved transmission resources indicated in the control information to send control information and data to the receiving UE through the physical control channel / physical shared channel. For example, the sending UE can use the reserved transmission resources indicated in the SCI to send SCI and sidelink data to the receiving UE through PSCCH / PSSCH. When a receiving UE receives a MAC PDU with HARQ feedback enabled (e.g., control information indicating that a HARQ feedback option and associated physical shared channel transmission are enabled) through a physical control channel / physical shared channel, if reception of the physical control channel / physical shared channel is successful, the receiving UE may send a HARQ feedback ACK through the physical feedback channel, and if decoding of the physical control channel / physical shared channel fails, a HARQ feedback NACK may be sent through the physical feedback channel. For example, when a receiving UE receives a MAC PDU with HARQ feedback enabled (e.g., SCI indicating that a HARQ feedback option and associated PSSCH transmission are enabled) through a PSCCH / PSSCH, if reception of the PSCCH / PSSCH is successful, the receiving UE may send a HARQ feedback ACK through a PSFCH, and if decoding of the PSCCH / PSSCH fails, a HARQ feedback NACK may be sent through a PSFCH.

[0135] The transmitting UE and / or the receiving UE receives / transmits a physical shared channel, and then, if beam failure recovery (BFR) is triggered before the physical feedback channel is sent / received (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on the measurement of a reference signal), the transmitting UE and / or the receiving UE may skip the transmission / reception of the physical feedback channel. For example, the transmitting UE and / or the receiving UE receives / transmits a PSSCH, and then, if beam failure recovery (BFR) is triggered before the PSFCH is sent / received (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on the measurement of a reference signal), the transmitting UE and / or the receiving UE may skip the transmission / reception of the PSFCH. For example, the transmitting UE and / or the receiving UE receives / transmits a physical shared channel, and then, if beam failure recovery (BFR) is triggered before transmitting / receiving a physical feedback channel (e.g., when the UE receives a BFR MAC CE from the peer UE, thereby triggering the UE's own BFR process), the transmitting UE and / or the receiving UE may send pre-configured information (e.g., NACK, ACK, or a special status) to the peer UE. For example, the transmitting UE and / or the receiving UE receives / transmits a PSSCH, and then, if beam failure recovery (BFR) is triggered before transmitting / receiving a PSFCH (e.g., when the UE receives a BFR MAC CE from the peer UE, thereby triggering the UE's own BFR process), the transmitting UE and / or the receiving UE may send pre-configured information (e.g., NACK, ACK, or a special status) to the peer UE. For example, a transmitting UE transmits a physical shared channel, and then, if beam failure recovery (BFR) is triggered before receiving a physical feedback channel (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on measurement of a reference signal), so that reception of the physical feedback channel is skipped, the transmitting UE may regard the transmitted physical control channel / physical shared channel as NACK (e.g., when operating in NACK-only HARQ feedback mode). For example, a transmitting UE transmits a PSSCH, and then, if beam failure recovery (BFR) is triggered before receiving a PSFCH (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on measurement of a reference signal), so that reception of the PSFCH is skipped, the transmitting UE may regard the transmitted PSCCH / PSSCH as NACK (e.g., when operating in NACK-only HARQ feedback mode).For example, if a transmitting UE transmits a physical control channel / physical shared channel, and then, if beam failure recovery (BFR) is triggered before receiving a physical feedback channel (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on reference signal measurement), thereby skipping reception of the physical feedback channel, the transmitting UE may regard the transmitted physical control channel / physical shared channel as an ACK (e.g., when operating in a NACK-only HARQ feedback mode) and flush the corresponding HARQ buffer. For example, if a transmitting UE transmits a PSCCH / PSSCH, and then, if beam failure recovery (BFR) is triggered before receiving a PSFCH (e.g., when the UE receives a BFR MAC CE from a peer UE, thereby triggering the UE's own BFR process, or when the UE triggers BFR itself based on reference signal measurement), thereby skipping reception of the PSFCH, the transmitting UE may regard the transmitted PSCCH / PSSCH as a NACK (e.g., when operating in a NACK-only HARQ feedback mode) and flush the corresponding HARQ buffer.

[0136] Unnecessary resource allocation can be prevented based on BFR detection. Unnecessary resource allocation can be prevented by treating a physical shared channel transmitted based on BFR detection as an ACK. Unnecessary resource allocation can be prevented by treating a failure to receive a physical feedback channel corresponding to a physical shared channel based on BFR detection as an ACK. HARQ buffer overflow can be prevented by flushing the relevant HARQ buffer when a physical feedback channel corresponding to a physical shared channel is not received based on BFR detection. Unnecessary resource allocation can be prevented by stopping monitoring of the PSFCH based on a failure to receive a physical feedback channel corresponding to a physical shared channel based on BFR detection.

[0137] For example, unnecessary Mode 1 resource allocation can be prevented based on BFR detection. For example, unnecessary Mode 1 resource allocation can be prevented by treating a PSSCH sent based on BFR detection as an ACK. For example, unnecessary Mode 1 resource allocation can be prevented by treating a failure to receive a PSFCH corresponding to a PSSCH based on BFR detection as an ACK. For example, HARQ buffer overflow can be prevented by flushing the relevant HARQ buffer when a PSFCH corresponding to a PSSCH is not received based on BFR detection. For example, unnecessary Mode 1 resource allocation can be prevented by stopping monitoring of the PSFCH based on a failure to receive a PSFCH corresponding to a PSSCH based on BFR detection.

[0138] In various embodiments of the present disclosure, “channel” may be applied by replacing “carrier” or “resource block set of a specific carrier” or “frequency band”.

[0139] In the embodiments of the present disclosure, spatial settings and / or transmission configuration indicator (TCI) information and / or quasi-co-location (QCL) information and / or beams may refer to each other and / or may be interchangeably interpreted as beam-related information, beam directions, spatial domain transmit filters, and / or spatial domain receive filters. For example, the spatial domain transmit filter may be a spatial domain TX filter. For example, the spatial domain receive filter may be a spatial domain RX filter.

[0140] In an embodiment of the present disclosure, the fact that the spatial configuration information (or beam information) is the same for transmission may mean that the spatial domain TX filter of the UE is the same for two different transmission signals. In an embodiment of the present disclosure, the fact that the spatial configuration information (or beam information) is the same for reception may mean that two different reception signals are in a QCL "Type D" relationship and / or use the same spatial RX parameters.

[0141] For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each SL-channel access priority category (CAPC). For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each SL-LBT type (e.g., Type 1 LBT, Type 2A LBT, Type 2B LBT, Type 2C LBT). For example, depending on whether frame-based LBT is applied, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be specifically (or differently or independently) configured. For example, depending on whether load-based LBT is applied, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be specifically (or differently or independently) configured.

[0142] For example, whether to apply (some) of the proposed schemes / rules and / or related parameters (e.g., thresholds) of the present disclosure can be specifically (or differently or independently) configured based on whether LBT is successful / failed, the relevant energy detection level of each LBT, each side link channel (PSCCH / PSSCH, PSFCH, SL-SSB (or S-SSB)), whether MCSt (multiple continuous time slot transmission) is applied, whether multiple PSFCH timings are applied, whether the resource order / position is composed of MCSt, whether multiple starting points are configured within a time slot, whether the first starting point (or second starting point) is applied, etc.

[0143] Whether to apply the (some) proposed schemes / rules and / or related parameters (e.g., thresholds) of the present disclosure can be specifically (or differently or independently) configured based on whether LBT is successful / failed, the relevant energy detection level of each LBT, each side link channel (PSCCH / PSSCH, PSFCH, SL-SSB (or S-SSB)), whether MCSt (multiple continuous time slot transmission) is applied, whether multiple PSFCH timings are applied, whether the resource order / position is composed of MCSt, whether multiple starting points are configured within a time slot, whether the first starting point (or second starting point) is applied, etc.

[0144] For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each resource pool. For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each congestion level. For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each service priority. For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each service type. For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each QoS requirement (e.g., latency, reliability). For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each PQI (5G QoS Identifier (5QI) for PC5). For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each service type (e.g., periodic generation or non-periodic generation). For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each SL transmission resource allocation mode (e.g., mode 1 or mode 2). For example, whether to apply (some) of the methods / rules and / or related parameters (e.g., thresholds) proposed in the present disclosure may be configured (differently or independently) for each Tx profile (e.g., a Tx profile indicating that the service supports sidelink DRX operation or a Tx profile indicating that the service does not need to support sidelink DRX operation).

[0145] For example, depending on whether PUCCH configuration is supported, whether the proposed rules and / or related parameter configuration values ​​of the present disclosure are applied can be specifically (and / or independently and / or differently) configured. For example, when PUCCH resources are configured, whether the proposed rules and / or related parameter configuration values ​​of the present disclosure are applied can be specifically (and / or independently and / or differently) configured. For example, when PUCCH resources are not configured, whether the proposed rules and / or related parameter configuration values ​​of the present disclosure are applied can be specifically (and / or independently and / or differently) configured. For example, whether the proposed rules and / or related parameter configuration values ​​of the present disclosure are applied can be specifically (and / or independently and / or differently) configured for each resource pool. For example, whether the proposed rules and / or related parameter configuration values ​​of the present disclosure are applied can be specifically (and / or independently and / or differently) configured for a resource pool configured with PSFCH. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for a resource pool that is not configured with a PSFCH. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for a specific side link logical channel. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for a specific side link logical channel group. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for a specific Uu logical channel. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for a specific Uu logical channel group. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured according to the service / packet type. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present invention can be specifically (and / or independently and / or differently) configured according to service / packet priority. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present invention can be specifically (and / or independently and / or differently) configured for each QoS profile. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present invention can be specifically (and / or independently and / or differently) configured for QoS requirements. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present invention can be specifically (and / or independently and / or differently) configured for QoS requirements related to URLLC / EMBB services. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present invention can be specifically (and / or independently and / or differently) configured for reliability-related QoS requirements.For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for latency-related QoS requirements. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for PQI. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for PFI. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for broadcast type. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for unicast broadcast type. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for multicast broadcast type. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for the broadcast transmission type. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for the congestion level of the resource pool. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for CBR. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for SL HARQ feedback type. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for NACK-only HARQ feedback. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for ACK / NACK HARQ feedback. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for MAC PDU transmission with HARQ feedback enabled. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for MAC PDU transmission with HARQ feedback disabled. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on whether a PUCCH-based SL HARQ feedback reporting operation is configured. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an L1 source identifier when performing preemption.For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L1 destination identifier when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L2 source identifier when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L2 destination identifier when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L1 source identifier when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L1 destination identifier when performing preemption-based resource reselection. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for the L2 source identifier when performing resource reselection based on preemption. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for the L2 destination identifier when performing resource reselection based on preemption. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for the L1 source identifier when performing reassessment. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for the L1 destination identifier when performing reassessment. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure can be specifically (and / or independently and / or differently) configured for the L2 source identifier when performing reassessment. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L2 destination identifier when performing re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L1 source identifier when performing resource reselection based on re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L1 destination identifier when performing resource reselection based on re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for the L2 source identifier when performing resource reselection based on re-evaluation.For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an L2 destination identifier when performing re-evaluation-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier associated with an L1 source ID and a destination ID when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier associated with an L2 source ID and a destination ID when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier associated with an L1 source ID and a destination ID when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with the L2 source ID and destination ID when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with the L2 source ID and destination ID when performing reassessment. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with the L2 source ID and destination ID when performing reassessment-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with the L2 source ID and destination ID when performing reassessment-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L1 source ID and destination ID pair and a broadcast type when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L2 source ID and a destination ID pair and a broadcast type when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L1 source ID and a destination ID pair and a broadcast type when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L2 source ID and a destination ID pair and a broadcast type when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L1 source ID and a destination ID pair and a broadcast type when performing reassessment.For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L2 source ID and destination ID pair and a broadcast type when performing re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L1 source ID and destination ID pair and a broadcast type when performing re-evaluation-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a combination of an L2 source ID and destination ID pair and a broadcast type when performing re-evaluation-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for identifiers associated with a direction of an L1 source ID and destination ID pair when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L2 source ID and destination ID pair when performing preemption. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L1 source ID and destination ID pair when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L2 source ID and destination ID pair when performing preemption-based resource reselection. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L1 source ID and destination ID pair when performing reassessment. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L2 source ID and destination ID pair when performing re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L1 source ID and destination ID pair when performing resource reselection based on re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L2 source ID and destination ID pair when performing resource reselection based on re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for an identifier related to the direction of the L2 source ID and destination ID pair when performing resource reselection based on re-evaluation. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured for a PC5 RRC connection.For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured for the PC5RRC link. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured based on the SL mode type when performing SL DRX. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 1 when performing SL DRX. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 2 when performing SL DRX. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure can be specifically (and / or independently and / or differently) configured based on the SL mode type when supporting SLDRX. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 1 when SL DRX is supported. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 2 when SL DRX is supported. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type when SL DRX is not performed. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 1 when SL DRX is not performed. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 2 when SL DRX is not performed. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type when SL DRX is not supported. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 1 when SL DRX is not supported. For example, whether to apply the rules and / or related parameter configuration values ​​proposed in the present disclosure may be specifically (and / or independently and / or differently) configured based on the SL mode type associated with resource allocation mode 2 when SL DRX is not supported.For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for periodic resource reservation. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for aperiodic resource reservation. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured based on a transmit (Tx) profile. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for a Tx profile indicating a service that supports sidelink DRX operation. For example, whether to apply the proposed rules and / or related parameter configuration values ​​of the present disclosure may be specifically (and / or independently and / or differently) configured for a Tx profile indicating a service that does not need to support sidelink DRX operation.

[0146] The proposed rules (and / or related parameter configuration values) proposed and whether to apply the present disclosure may also be applied to mmWave SL operations.

[0147] Figure 12 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0148] Reference Figure 12 In step S1210, the first device may transmit control information for scheduling a physical shared channel on a physical control channel. In step S1220, the first device may transmit data on the physical shared channel. In step S1230, the first device may detect a beam failure. In step S1240, the first device may trigger beam failure recovery based on the detection of the beam failure. In step S1250, the first device may determine hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0149] For example, based on the triggered beam failure recovery, the HARQ buffer for the HARQ process associated with the physical shared channel may be flushed.

[0150] For example, based on the triggered beam failure recovery, reception on the physical feedback channel related to the physical shared channel may be skipped.

[0151] For example, based on the triggered beam failure recovery, the HARQ-ACK information for the physical shared channel can be determined as negative ACK.

[0152] For example, beam failure recovery may be triggered based on having received a medium access control (MAC) control element (CE) related to beam failure recovery from the second device.

[0153] For example, beam failure recovery may be triggered based on measurements of a reference signal associated with the beam failure.

[0154] For example, the HARQ-ACK information for the physical shared channel may include only negative acknowledgements (NACKs).

[0155] For example, based on the triggered beam failure recovery, at least one of NACK, ACK, or a special status may be sent to the second device related to the beam failure recovery.

[0156] For example, beam failure may be detected based on having received a beam failure instance from the physical layer of the first device.

[0157] For example, the first device may obtain a beam failure maximum count.

[0158] For example, based on having received a beam failure instance from the physical layer of the first device, the beam failure instance counter may be incremented by one.

[0159] For example, beam failure recovery may be triggered based on a beam failure instance counter being greater than or equal to a beam failure maximum count.

[0160] For example, based on having received a beam failure instance from the physical layer of the first device, a beam failure detection timer may be started or restarted.

[0161] For example, based on the expiration of the beam failure detection timer, the beam failure instance counter may be set to zero.

[0162] For example, the physical control channel may be a Physical Sidelink Control Channel (PSCCH).

[0163] For example, the physical shared channel may be a physical sidelink shared channel (PSSCH).

[0164] For example, the control information may be sidelink control information (SCI).

[0165] The proposed method can be applied to devices based on various embodiments of the present disclosure.

[0166] First, the processor 102 of the first device 100 may control the transceiver 106 to transmit control information for scheduling a physical shared channel on a physical control channel. Furthermore, the processor 102 of the first device 100 may control the transceiver 106 to transmit data on the physical shared channel. Furthermore, the processor 102 of the first device 100 may detect a beam failure. Furthermore, the processor 102 of the first device 100 may trigger beam failure recovery based on the detection of the beam failure. Furthermore, the processor 102 of the first device 100 may determine hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0167] Based on an embodiment of the present disclosure, a first device suitable for performing wireless communication may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions. For example, the instructions, upon being executed by the at least one processor, may cause the first device to perform operations including: sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; detecting beam failure; triggering beam failure recovery based on the detection of beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0168] Based on an embodiment of the present disclosure, a processing device suitable for controlling a first device may be provided. The processing device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions. For example, the instructions, upon being executed by the at least one processor, may cause the first device to perform operations including: sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0169] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, upon being executed, the instructions may cause a first apparatus to perform operations including: transmitting control information for scheduling a physical shared channel on a physical control channel; transmitting data on the physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and determining hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel as a positive ACK based on the triggered beam failure recovery.

[0170] Figure 13 A method for a second device to perform wireless communication according to an embodiment of the present disclosure is shown. Figure 13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0171] Reference Figure 13 In step S1310, the second device may receive control information for scheduling a physical shared channel from the first device on a physical control channel. In step S1320, the second device may receive data from the first device on a physical shared channel. In step S1330, the second device may detect a beam failure. In step S1340, the second device may trigger beam failure recovery based on the detection of the beam failure. In step S1350, the second device may send a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0172] For example, based on the triggered beam failure recovery, the HARQ buffer for the HARQ process associated with the physical shared channel may be flushed.

[0173] For example, based on the triggered beam failure recovery, reception on the physical feedback channel related to the physical shared channel may be skipped.

[0174] For example, based on the triggered beam failure recovery, the HARQ-ACK information for the physical shared channel can be determined as negative ACK.

[0175] For example, beam failure recovery may be triggered based on having received a medium access control (MAC) control element (CE) related to beam failure recovery from the second device.

[0176] For example, beam failure recovery may be triggered based on measurements of a reference signal associated with the beam failure.

[0177] For example, the HARQ-ACK information for the physical shared channel may include only negative acknowledgements (NACKs).

[0178] For example, based on the triggered beam failure recovery, at least one of NACK, ACK, or a special status may be sent to the second device related to the beam failure recovery.

[0179] For example, beam failure may be detected based on having received a beam failure instance from the physical layer of the first device.

[0180] For example, the first device may obtain a beam failure maximum count.

[0181] For example, based on having received a beam failure instance from the physical layer of the first device, the beam failure instance counter may be incremented by one.

[0182] For example, beam failure recovery may be triggered based on a beam failure instance counter being greater than or equal to a beam failure maximum count.

[0183] For example, based on having received a beam failure instance from the physical layer of the first device, a beam failure detection timer may be started or restarted.

[0184] For example, based on the expiration of the beam failure detection timer, the beam failure instance counter may be set to zero.

[0185] For example, the physical control channel may be a Physical Sidelink Control Channel (PSCCH).

[0186] For example, the physical shared channel may be a physical sidelink shared channel (PSSCH).

[0187] For example, the control information may be sidelink control information (SCI).

[0188] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 202 of the second device 200 can control the transceiver 206 to receive control information for scheduling a physical shared channel from the first device on a physical control channel. In addition, the processor 202 of the second device 200 can control the transceiver 206 to receive data from the first device on a physical shared channel. In addition, the processor 202 of the second device 200 can detect a beam failure. In addition, the processor 202 of the second device 200 can trigger beam failure recovery based on the detection of a beam failure. In addition, the processor 202 of the second device 200 can control the transceiver 206 to send a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel can be determined as a positive ACK.

[0189] Based on the embodiments of the present disclosure, a second device suitable for performing wireless communication may be provided. The second device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions. For example, the instructions may cause the second device to perform an operation based on being executed by the at least one processor, the operation including: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on a physical shared channel; detecting beam failure; triggering beam failure recovery based on detecting beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0190] Based on the embodiments of the present disclosure, a processing device suitable for controlling a second device may be provided. For example, the processing device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, may cause the second device to perform an operation, the operation including: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on a physical shared channel; detecting a beam failure; triggering beam failure recovery based on detecting a beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0191] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, the instructions, upon being executed, may cause a second device to perform an operation, the operation comprising: receiving control information for scheduling a physical shared channel from a first device on a physical control channel; receiving data from the first device on a physical shared channel; detecting a beam failure; triggering beam failure recovery based on the detection of the beam failure; and sending a medium access control (MAC) control element (CE) related to beam failure recovery to the first device based on the triggered beam failure recovery. For example, based on the triggered beam failure recovery, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel may be determined as a positive ACK.

[0192] Various embodiments of the present disclosure may be combined with each other.

[0193] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0194] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0195] Hereinafter, a more detailed description will be given with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0196] Figure 14 A communication system 1 according to an embodiment of the present disclosure is shown. Figure 14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0197] Reference Figure 14 , 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 with 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) and / or an aircraft (AV) (e.g., an advanced air mobility (AAM)). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smartphones, smart pads, 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.

[0198] 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 narrowband IoT for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, without being 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 LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented as at least 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, without being 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, ZigBee technology can generate a personal area network (PAN) related to low / low-power digital communication based on various standards including IEEE 802.15.4, and may be referred to by various names.

[0199] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0200] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection can be established via various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other via wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals via various physical channels. To this end, various configuration information configuration processes for transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0201] Figure 15 A wireless device according to an embodiment of the present disclosure is shown. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0202] Reference Figure 15 , the first wireless device 100 and the second wireless device 200 can transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 14 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x} in.

[0203] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processor(s) 102 may control the memory(s) 104 and / or the transceiver(s) 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 102 may process information in the memory(s) 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver(s) 106. The processor(s) 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 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 performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem / circuitry / 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 via the antenna(s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver(s) 106 may be interchangeably used with the radio frequency (RF) unit(s). In the present disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0204] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also include one or more transceivers 206 and / or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and / or the transceiver(s) 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 202 may process information in the memory(s) 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver(s) 206. The processor(s) 202 may receive a radio signal including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. Memory(s) 204 may be connected to processor(s) 202 and may store various information related to the operation of processor(s) 202. For example, memory(s) 204 may store software code including commands for executing part or all of the processing controlled by processor(s) 202 or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, processor(s) 202 and memory(s) 204 may be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). Transceiver(s) 206 may be connected to processor(s) 202 and transmit and / or receive radio signals via antenna(s) 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver(s) 206 may be used interchangeably with RF unit(s). In this disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0205] The hardware elements of wireless devices 100 and 200 will be described in more detail below. 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) based on the descriptions, functions, processes, proposals, methods, and / or operational procedures disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information based on the descriptions, functions, processes, proposals, methods, and / or operational procedures disclosed herein. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information based on the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information based on the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document.

[0206] 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 codes, commands and / or command sets.

[0207] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 can 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 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0208] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels described in the methods and / or operational flows of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels described in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational 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 so as to process the 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 of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0209] Figure 16 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0210] Reference Figure 16 , 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. Figure 16 operations / functions, not limited to Figure 15The processor (102, 202) and / or transceiver (106, 206) of Figure 15 The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 16 For example, you can Figure 15 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 15 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Figure 15 The transceiver (106, 206) is used to implement block 1060.

[0211] Can be passed Figure 16 Signal processing circuit 1000 converts a codeword into a radio signal. Herein, a codeword is a sequence of coded bits for an information block. An information block may include a transport block (e.g., a UL-SCH transport block, a DL-SCH transport block). Radio signals may be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0212] 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) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0213] The resource mapper 1050 can 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 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can 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.

[0214] Can Figure 16 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. Figure 15 100, 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 shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0215] Figure 17 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Figure 14 ). Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0216] Reference Figure 17 , the wireless device (100, 200) may correspond to Figure 15 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit 110, a control unit 120, a storage unit 130 and additional components 140. The communication unit may include a communication circuit 112 and (one or more) transceivers 114. For example, the communication circuit 112 may include Figure 15 One or more processors (102, 202) and / or one or more memories (104, 204). For example, the transceiver(s) 114 may include Figure 15The 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 transmit 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.

[0217] The additional component 140 may be configured in various ways depending on the type of 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 ( Figure 14 100a), vehicles ( Figure 14 100b-1 and 100b-2), XR devices ( Figure 14 100c), handheld device ( Figure 14 100d), household appliances ( Figure 14 100e), IoT devices ( Figure 14 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 14 400), BS( Figure 14 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0218] exist Figure 17In the embodiment of the present invention, the various elements, components, units / parts and / or modules in the wireless device (100, 200) can all 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 through a wired interface, 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 can be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0219] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 17 .

[0220] Figure 18 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch 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). Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0221] Reference Figure 18 , the handheld device 100 may include an antenna unit (108), a communication unit 110, a control unit 120, a storage 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 Figure 17 Frame 110 to 130 / 140.

[0222] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a base station. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The storage unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and may include wired / wireless charging circuits, a battery, etc. The interface unit 140b can support connection between the handheld device 100 and other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., an audio I / O port and a video I / O port). The I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0223] 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 storage unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals and transmit the converted radio signals directly 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 storage unit 130 and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0224] Figure 19 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 19 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0225] Reference Figure 19 , the vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 17 Box 110 / 130 / 140.

[0226] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a can 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 system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuits, a battery, etc. The sensor unit 140c can acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU), a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement technology for maintaining the lane in which the vehicle is traveling, technology for automatically adjusting the speed (for example, adaptive cruise control), technology for autonomously driving along a determined path, technology for driving by automatically setting a path with a destination set, etc.

[0227] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can aperiodically / periodically acquire the latest traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle's location, autonomous driving path, and / or driving plan to the external server. The external server can use AI technology, etc. based on the information collected from the vehicle or autonomous vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0228] 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 performed by a first device in a wireless communication system, the method comprising the following steps: Sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as a positive ACK.

2. The method according to claim 1, in, Based on the beam failure recovery being triggered, a HARQ buffer for a HARQ process associated with the physical shared channel is flushed.

3. The method according to claim 1, in, Reception on a physical feedback channel related to the physical shared channel is skipped based on the beam failure recovery being triggered.

4. The method according to claim 1, in, Based on the beam failure recovery being triggered, the HARQ-ACK information for the physical shared channel is determined as a negative ACK.

5. The method according to claim 1, in, The beam failure recovery is triggered based on a medium access control (MAC) control element (CE) related to the beam failure recovery having been received from a second device.

6. The method according to claim 1, in, The beam failure recovery is triggered based on a measurement of a reference signal associated with the beam failure.

7. The method according to claim 1, in, The HARQ-ACK information for the physical shared channel includes only negative acknowledgement (NACK).

8. The method according to claim 1, in, Based on the beam failure recovery being triggered, at least one of a NACK, an ACK, or a special status is sent to a second device related to the beam failure recovery.

9. The method according to claim 1, in, The beam failure is detected based on having received a beam failure instance from a physical layer of the first device.

10. The method according to claim 1, in, The first device obtains a maximum beam failure count, wherein, based on having received a beam failure instance from the physical layer of the first device, a beam failure instance counter is incremented by 1, and Wherein, based on the beam failure instance counter reaching the beam failure maximum count, the beam failure recovery is triggered.

11. The method according to claim 10, in, Based on having received the beam failure instance from the physical layer of the first device, starting or restarting a beam failure detection timer.

12. The method according to claim 11, in, Upon expiration of the beam failure detection timer, the beam failure instance counter is set to zero.

13. The method according to claim 1, in, The physical control channel is a physical sidelink control channel (PSCCH), The physical shared channel is a physical sidelink shared channel (PSSCH). The control information is sidelink control information (SCI).

14. A first device adapted to perform wireless communication, the first device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the first device to perform operations upon execution by the at least one processor, the operations comprising: Sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as a positive ACK.

15. A processing device adapted to control a first device, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the first device to perform operations upon execution by the at least one processor, the operations comprising: Sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as a positive ACK.

16. A non-transitory computer-readable storage medium storing instructions, the instructions, upon being executed, causing a first device to perform operations, the operations comprising: Sending control information for scheduling a physical shared channel on a physical control channel; sending data on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as a positive ACK.

17. A method performed by a second device in a wireless communication system, the method comprising the following steps: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; as well as Based on the beam failure recovery being triggered, sending a medium access control (MAC) control element (CE) related to the beam failure recovery to the first device, Wherein, based on the beam failure recovery having been triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as positive ACK.

18. A second device adapted to perform wireless communication, the second device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations upon execution by the at least one processor, the operations comprising: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, sending a medium access control (MAC) control element (CE) related to the beam failure recovery to the first device, Wherein, based on the beam failure recovery having been triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as positive ACK.

19. A processing device adapted to control a second device, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations upon execution by the at least one processor, the operations comprising: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; and Based on the beam failure recovery being triggered, sending a medium access control (MAC) control element (CE) related to the beam failure recovery to the first device, Wherein, based on the beam failure recovery having been triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as positive ACK.

20. A non-transitory computer-readable storage medium storing instructions, wherein the instructions, upon being executed, cause a second device to perform operations, the operations comprising: receiving control information for scheduling a physical shared channel from the first device on a physical control channel; receiving data from the first device on the physical shared channel; Detection beam failed; triggering beam failure recovery based on detecting the beam failure; as well as Based on the beam failure recovery being triggered, sending a medium access control (MAC) control element (CE) related to the beam failure recovery to the first device, Wherein, based on the beam failure recovery having been triggered, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information for the physical shared channel is determined as positive ACK.

Images