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

Abstract

A method for a first device to perform wireless communication and an apparatus supporting the same are provided. The method may comprise the steps of: generating a first grant based on a first beam for a second device; transmitting control information for scheduling a physical shared channel to a second device on a physical control channel according to a first grant generated based on the first beam; transmitting data to a second device on a physical shared channel according to a first grant based on the first beam generation; and triggering resource reselection in accordance with the first grant based on the first beam generation being unavailable.

Description

TECHNICAL FIELD

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

[0002] 5G NR is a next-generation mobile communication system having new characteristics such as high performance, low latency, high availability, etc., as a successor technology of long term evolution (LTE). 5G NR can utilize all available spectrum resources including low frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, high-frequency (millimeter-wave) bands above 24 GHz, etc.

[0003] 6G (wireless communication) systems have purposes such as (i) very high data rates per device, (ii) very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-less IoT devices, (vi) ultra-reliable connectivity, and (vii) connected intelligent with machine learning capabilities. The vision of 6G systems can include four aspects such as intelligent connectivity, deep connectivity, hologram connectivity, and ubiquitous connectivity, and 6G systems can satisfy the requirements shown in Table 1 below. That is, Table 1 shows the requirements of 6G systems.

[0004] [Table 1]

[0005] Peak data rate per device 1 Tbps E2E latency 1 ms Max spectral efficiency 100 bps / Hz Mobility support Up to 1000 km / hour Satellite integration Full AI Full Autonomous vehicles Full XR Full Haptic communications Full SUMMARY

[0006] TECHNICAL PROBLEM

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

[0008] TECHNICAL SOLUTION

[0009] Based on the embodiments, a method for performing wireless communication by a first device can be provided. The method can include creating a first grant based on a first beam for a second device, transmitting control information for scheduling a physical shared channel on a physical control channel to the second device according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second device according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0010] Based on an embodiment, a first apparatus adapted to perform wireless communication can be provided. The first apparatus can include at least one transceiver, at least one processor, and at least one memory connected to the at least one processor and storing instructions that, based on execution by the at least one processor, can cause the first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second apparatus according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0011] Based on an embodiment, a processing apparatus adapted to control a first apparatus can be provided. For example, the processing apparatus can include at least one processor, and at least one memory connected to the at least one processor and storing instructions that, based on execution by the at least one processor, can cause the first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second apparatus according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0012] Based on an embodiment, a non-transitory computer-readable storage medium storing instructions can be provided. The instructions, based on execution, can cause a first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second apparatus according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0013] Based on an embodiment, a method for performing wireless communication by a second apparatus can be provided. The method can include receiving control information for scheduling a physical shared channel on a physical control channel from a first apparatus according to a first grant created by the first apparatus based on a first beam for the second apparatus, and receiving data on the physical shared channel from the first apparatus according to the first grant created based on the first beam. For example, triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0014] Based on an embodiment, a second device adapted to perform wireless communication can be provided. The second device can include at least one transceiver, at least one processor, and at least one memory connected to the at least one processor and storing instructions, and the instructions, based on being executed by the at least one processor, can cause the second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

[0015] Based on an embodiment, a processing device adapted to control a second device can be provided. For example, the processing device can include at least one processor, and at least one memory connected to the at least one processor and storing instructions, and the instructions, based on being executed by the at least one processor, can cause the second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

[0016] Based on an embodiment, a non-transitory computer-readable storage medium storing instructions can be provided. The instructions, based on being executed, can cause a second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

[0017] Advantageous Effects

[0018] The disclosure can provide a method and apparatus capable of efficiently providing services in a wireless communication system. For example, through an embodiment proposed by the disclosure, beam-based communication can be efficiently performed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A communication structure that can be provided in a 6G system based on an embodiment of the disclosure is illustrated.

[0020] Figure 2 An electromagnetic spectrum based on an embodiment of the disclosure is illustrated.

[0021] Figure 3 An example illustrating a transparent payload based NTN typical scenario based on embodiments of the present disclosure is shown.

[0022] Figure 4 An example illustrating a regenerative payload based NTN typical scenario based on embodiments of the present disclosure is shown.

[0023] Figure 5 An example illustrating a sensing operation based on embodiments of the present disclosure is shown.

[0024] Figure 6 An example illustrating a structure of a slot of a frame based on embodiments of the present disclosure is shown.

[0025] Figure 7 An example illustrating a BWP based on embodiments of the present disclosure is shown.

[0026] Figure 8 An example illustrating a procedure for a UE to perform V2X or SL communication based on a resource allocation mode based on embodiments of the present disclosure is shown.

[0027] Figure 9 An example illustrating a wireless communication environment based on embodiments of the present disclosure is shown.

[0028] Figure 10 A beam failure recovery procedure based on embodiments of the present disclosure is shown.

[0029] Figure 11 An example related to resource reselection based on embodiments of the present disclosure is shown.

[0030] Figure 12 A method for a first apparatus to perform wireless communication based on embodiments of the present disclosure is shown.

[0031] Figure 13 A method for a second apparatus to perform wireless communication based on embodiments of the present disclosure is shown.

[0032] Figure 14 A communication system 1 based on embodiments of the present disclosure is shown.

[0033] Figure 15 A wireless device based on embodiments of the present disclosure is shown.

[0034] Figure 16 A signal processing circuit for transmitting a signal based on embodiments of the present disclosure is shown.

[0035] Figure 17 Another example of a wireless device based on embodiments of the present disclosure is shown.

[0036] Figure 18A hand-held device based on an embodiment of the disclosure is illustrated.

[0037] Figure 19 A vehicle or autonomous vehicle based on an embodiment of the disclosure is illustrated. DETAILED DESCRIPTION

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

[0039] In the disclosure, a slash ( / ) or a comma used can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0040] In the disclosure, "at least one of A and B" can mean "A only", "B only", or "both A and B". Also, in the disclosure, the expression "at least one of A or B" or "at least one of A and / or B" can be interpreted as "at least one of A and B".

[0041] Also, in the disclosure, "at least one of A, B, and C" can mean "A only", "B only", "C only", or "any combination of A, B, and C". Also, "at least one of A, B, or C" or "at least one of A, B, and / or C" can mean "at least one of A, B, and C".

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

[0043] In the following description, "when", "if", or "in the case of" can be replaced with "based on".

[0044] The technical features described in one drawing in the disclosure can be implemented respectively, or can be implemented simultaneously.

[0045] In the disclosure, a higher layer parameter can be a parameter configured, pre-configured, or pre-defined for a UE. For example, a base station or a network can transmit a higher layer parameter to a UE. For example, a higher layer parameter can be transmitted through radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0046] In the disclosure, "configured / configuring or defined / defining" can be interpreted as being configured or pre-configured for an apparatus through pre-defined signaling (e.g., SIB, MAC, RRC) from a base station or a network. In the disclosure, "configured / configuring or defined / defining" can be interpreted as being pre-configured for an apparatus.

[0047] The technology described below can be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. The CDMA can be implemented by a radio technology such as universal terrestrial radio access (UTRA) or CDMA-2000. The TDMA can be implemented by a radio technology such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). The OFDMA can be implemented by a radio technology 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, etc.

[0048] The technology proposed in the disclosure can be implemented as a 6G wireless technology, and can be applied to various 6G systems. For example, a 6G system can 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 A communication structure that can be provided in a 6G system based on an embodiment of the disclosure is illustrated. Figure 1 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

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

[0051] - Satellite-integrated network

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

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

[0054] - Ubiquitous hyper-three-dimensional connectivity: Access to network and core network functions for 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 through communication (or location-based services) is one of the functions of the 6G wireless communication system. Therefore, a radar system will be integrated with the 6G network.

[0060] - Software and virtualization.

[0061] The core implementation technologies of the 6G system are described below.

[0062] - Artificial intelligence (AI): When AI is introduced into communication, real-time data transmission can be simplified and improved. AI can use countless analyses to determine methods for performing complex target tasks. That is, AI can increase efficiency and reduce processing delay. Time-consuming operations such as handover, network selection, and resource scheduling can be immediately performed through AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine. In addition, AI can be instant communication in brain-computer interface (BCI). An AI-based communication system can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radio, self-maintaining wireless networks, and machine learning.

[0063] Terahertz (THz) communications: Data rates can be increased by increasing bandwidth. This can be achieved by using sub-THz communications with wide bandwidth and applying advanced massive MIMO techniques. THz waves are referred to as sub-millimeter radiation, generally indicating a frequency band between 0.1 THz and 10 THz with corresponding wavelengths in the range of 0.03 mm to 3 mm. The 100 GHz to 300 GHz band range (sub-THz band) is considered as 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 300 GHz to 3 THz of the defined THz band is in the far infrared (IR) band. The 300 GHz to 3 THz band is part of the optical band, but is located at the border of the optical band and immediately after the RF band. Thus, the 300 GHz to 3 THz band has similarities with RF. Figure 2 The electromagnetic spectrum based on embodiments of the present disclosure is shown. Figure 2 Embodiments of the present disclosure can be combined with various embodiments of the present disclosure. The main features of THz communications include (i) wide availability of bandwidth to support very high data rates; and (ii) high path loss occurs at high frequencies (highly directional antennas are essential). Narrow beam width produced in highly directional antennas reduces interference. The small wavelength of THz signals allows the integration of a larger number of antenna elements with devices and BSs operating in this band. Thus, advanced adaptive arrangement techniques that can overcome range limitations can be used.

[0064] Massive MIMO techniques (large MIMO)

[0065] Holographic beamforming (HBF)

[0066] Optical wireless techniques

[0067] Free space optical (FSO) backhaul networks

[0068] Quantum communications

[0069] Cell-less communications

[0070] Integration of wireless information and power transfer

[0071] Integration of wireless communications and sensing

[0072] Integrated access and backhaul networks

[0073] Big data analytics

[0074] Reconfigurable intelligent surface

[0075] Meta universe

[0076] Blockchain

[0077] - Unmanned aerial vehicles (UAVs): UAVs or drones will be an important factor in 6G wireless communications. In most cases, high-speed data wireless connectivity can be provided using UAV technology. A base station (BS) entity is installed inside a UAV to provide cellular connectivity. A UAV can have certain functions that are not found in a fixed BS infrastructure, such as ease of deployment, strong line-of-sight links, and freedom of mobility control. During emergency situations such as natural disasters, it is economically unfeasible to deploy a terrestrial telecommunication infrastructure, and sometimes it is not possible to provide services in a turbulent environment. A UAV is capable of easily handling such situations. UAVs will become a new paradigm in the field of wireless communications. This technology facilitates the three big basic requirements of wireless networks, such as eMBB, URLLC, and mMTC. UAVs are also capable of being used for a variety of purposes, such as network connectivity improvement, fire detection, disaster emergency services, safety and monitoring, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most important technologies for 6G communications.

[0078] - Advanced air mobility (AAM): AAM is a superior concept of urban air mobility (UAM), which is air transportation that can be used in urban areas, and can refer to a transportation means that includes movement between urban areas and regional hubs.

[0079] - Autonomous driving (self-driving): Vehicle-to-everything (V2X) is a core element for establishing an autonomous driving infrastructure, and can be a technology in which vehicles communicate and share with various elements in the road, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I). In order to maximize the performance of autonomous driving and ensure high safety, high transmission speed and low latency technology is required. In addition, in the future, autonomous driving can need to go beyond delivering warning or guidance messages to drivers, and actively intervene in vehicle operation and directly control vehicles in dangerous situations. For this reason, since the amount of information that needs to be transmitted and received can be enormous, it is expected that autonomous driving will be maximized in 6G, which has a higher transmission speed and lower latency than 5G.

[0080] - Non-terrestrial networks (NTNs): NTNs can 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 transparent payload-based NTN typical scenario based on an embodiment of the disclosure is illustrated. Figure 4 An example of a regenerative payload-based NTN typical scenario based on an embodiment of the disclosure is illustrated. Figure 3 Or Figure 4 Embodiments of the disclosure can be combined with various embodiments of the disclosure. Refer to Figure 3The satellite (or UAS platform) can establish a service link with the UE. The satellite (or UAS platform) can connect to the gateway via a feeder link. The satellite can connect to the data network via the gateway. The beam coverage area refers to the area where the signal transmitted by the satellite can be received. (See reference...) Figure 4 A satellite (or UAS platform) can establish a service link with the UE. A satellite (or UAS platform) connected to the UE can connect to another satellite (or another UAS platform) via an inter-satellite link (ISL). Another satellite (or another UAS platform) can connect to the gateway via a feeder link. Based on regenerated payloads, a satellite can connect to the data network via a gateway and another satellite. If no ISL exists between satellites, a feeder link between the satellite and the gateway may be required. Figure 3 and Figure 4 This is merely 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 transparent or regenerated (with on-board processing) payloads. For example, a satellite (or UAS platform) can generate multiple beams over a designated service area based on the satellite's (or UAS platform's) field of view. For example, the satellite's (or UAS platform's) field of view can vary depending on the on-board antenna pattern and minimum elevation angle. For example, a transparent payload can include RF filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload can remain unchanged. For example, a regenerated payload can include RF filtering, frequency conversion and amplification, demodulation / decryption, switching and / or routing, and encoding / modulation. For example, a regenerated payload can be substantially equivalent to equipping a satellite (or UAS platform) with all or part of the base station functionality.

[0081] - Integrated Sensing and Communication (ISAC): Wireless sensing is a technology enabler to acquire information about characteristics of an environment and / or objects within the environment, which uses radio frequency to determine distance (range), angle, or instantaneous linear velocity of objects, etc. The radio frequency sensing function can serve as a device-free object positioning, as there is no need for objects to be connected via devices in the network. The ability to obtain range, velocity, and angle information from radio frequency signals can provide a wide range of new functions, such as various object detection, object identification (e.g., vehicles, people, animals, drones), and high-precision positioning, tracking, and activity recognition. For example, wireless sensing services can provide input to different verticals (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.), thereby enabling applications that provide, for example, intruder detection, assisted car maneuvering and navigation, trajectory tracking, collision avoidance, traffic management, health and activity monitoring, etc. In some cases, wireless sensing can also use non-3GPP types of sensors (e.g., radar, camera) to further support 3GPP-based sensing. For example, the operation of the wireless sensing service (i.e., sensing operation) can rely on the processing of the transmission, reflection, and scattering of wireless sensing signals. Thus, wireless sensing can have the opportunity to enhance traditional systems from a communication network to a wireless communication and sensing network. Figure 5 An example of a sensing operation based on an embodiment of the disclosure is shown. Figure 5 Embodiments of the disclosure can be combined with various embodiments of the disclosure. Specifically, Figure 5 (a) of FIG. 1 shows an example of sensing (e.g., single station sensing) with co-located sensing receiver and sensing transmitter, and Figure 5 (b) of FIG. 1 shows an example of sensing (e.g., double station sensing) with separated sensing receiver and sensing transmitter.

[0082] Radio interface protocol layers between the UE and the network can be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the open system interconnection (OSI) model well-known in the communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel to the upper layer, and the radio resource control (RRC) layer located at the third layer controls a radio resource between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0083] The physical layer provides an information transfer service to an upper layer through a physical channel. The physical layer is connected to a medium access control (MAC) layer, which is an upper layer of the physical layer, through a transport channel. Data is transferred through the transport channel between the MAC layer and the physical layer. Transport channels are classified into data channels for transfer of data information, and control channels for transfer of control information.

[0084] Data is transferred over a physical channel between different physical layers, i.e., a PHY layer of a transmitter and a PHY layer of a receiver. The physical channel can be modulated using an orthogonal frequency division multiplexing (OFDM) scheme, and the physical channel uses time and frequency as radio resources.

[0085] A MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer of the MAC layer, via a logical channel. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides a data transfer service through a logical channel.

[0086] The RLC layer performs concatenation, segmentation, and reassembly of a radio link control service data unit (RLC SDU). In order to ensure different quality of service (QoS) required by radio bearers (RBs), the RLC layer provides three types of operating modes, i.e., a transparent mode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM). The AM RLC provides error correction through an automatic repeat request (ARQ).

[0087] A radio resource control (RRC) layer is defined only in the control plane. The RRC layer is used for controlling the configuration, reconfiguration, and release of logical channels, transport channels, and physical channels associated with RBs. An RB is a logical path provided by the first layer (i.e., the physical layer or PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, the packet data convergence protocol (PDCP) layer, and the service data adaptation protocol (SDAP) layer) for data transmission between a UE and a network.

[0088] Functions of a packet data convergence protocol (PDCP) in the user plane include transmission of user data, header compression, and ciphering. Functions of a packet data convergence protocol (PDCP) in the control plane include transmission and ciphering / integrity protection of control plane data.

[0089] A service data adaptation protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between a quality of service (QoS) flow and a data radio bearer (DRB) and QoS flow ID (QFI) marking in both a DL packet and a UL packet.

[0090] The configuration of an RB means a process for specifying radio protocol layers and channel properties to provide a particular service and for determining corresponding detailed parameters and operation methods. The RB can then be classified into two types, i.e., a signaling radio bearer (SRB) and a data radio bearer (DRB). The SRB is used as a path for transmitting RRC messages in the control plane, and the DRB is used as a path for transmitting user data in the user plane.

[0091] When an RRC connection is established between an RRC layer of a UE and an RRC layer of an E-UTRAN, the UE is in an RRC connected (RRC_CONNECTED) state, and otherwise, the UE can be in an RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and a UE in the RRC_INACTIVE state can maintain a connection with a core network while releasing its connection with a BS.

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

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

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

[0095] In the case of using a normal CP, each slot can include 14 symbols. In the case of using an extended CP, each slot can include 12 symbols. Herein, a symbol can 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 represents the number of symbols (N slot symb ) of each slot, the number of slots per frame (N frame,μslot ) and the number of slots per subframe (N subframe ,μ slot .

[0097] [Table 2]

[0098]

[0099] Figure 6 A structure of a slot of an NR frame according to an embodiment of the disclosure is illustrated. Figure 6 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

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

[0101] A bandwidth part (BWP) can be a consecutive set of physical resource blocks (PRBs) within a given numerology. The PRBs can be selected from a consecutive set of common resource blocks (CRBs) for a given numerology on a given carrier.

[0102] Figure 7 An example of a BWP according to an embodiment of the disclosure is illustrated. Figure 7 Embodiments of the disclosure can be combined with various embodiments of the disclosure. It is assumed that, in embodiments of the disclosure, Figure 7 The number of BWPs is 3 in embodiments of the disclosure.

[0103] Referring to Figure 7 , a common resource block (CRB) can be a carrier resource block numbered from one end of a carrier band to the other end thereof. In addition, a PRB can be a resource block numbered within each BWP. Point A can indicate a common reference point of a resource block grid.

[0104] A CRB can be defined by point A, an offset (N start BWP ) from point A, and a bandwidth (N size BWPA point A can be used to configure a BWP. For example, the point A can be an external reference point of PRBs of a carrier, and subcarrier 0 of all numerologies (e.g., all numerologies supported by a network on a corresponding carrier) are aligned in the point A. For example, an offset can be a PRB distance between a lowest subcarrier within a given numerology and the point A. For example, a bandwidth can be a number of PRBs within a given numerology.

[0105] A sidelink synchronization signal (SLSS) can include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS) as sidelink (SL) specific sequences. The PSSS can be referred to as a sidelink primary synchronization signal (S-PSS), and the SSSS can be referred to as a sidelink secondary synchronization signal (S-SSS). For example, a length-127 M-sequence can be used for the S-PSS, and a length-127 Gold sequence can be used for the S-SSS. For example, a UE can use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE can use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

[0106] A physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information that a UE must know first before SL signal transmission / reception. For example, the default information can be information related to a SLSS, a duplex mode (DM), a time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to a resource pool, a type of application related to a SLSS, a subframe offset, broadcast information, etc. For example, for evaluation of PSBCH performance, a payload size of the PSBCH can be 56 bits including a 24-bit cyclic redundancy check (CRC) in NR V2X.

[0107] The S-PSS, the S-SSS, and the PSBCH can be included in a block format (e.g., a SL synchronization signal (SS) / PSBCH block, hereinafter, a sidelink synchronization signal block (S-SSB)) that supports periodic transmission. The S-SSB can have the same numerology (i.e., SCS and CP length) as a physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in a carrier, and a transmission bandwidth can exist within a (pre)configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (RBs). For example, the PSBCH can exist across 11 RBs. In addition, a frequency location of the S-SSB can be (pre)configured. Accordingly, a UE does not have to perform hypothesis detection at a frequency to discover the S-SSB in a carrier.

[0108] In the disclosure, the PSCCH can be replaced with a control channel, a physical control channel, a control channel related to sidelink, a physical control channel related to sidelink, etc. In the disclosure, the PSSCH can be replaced with a shared channel, a physical shared channel, a shared channel related to sidelink, a physical shared channel related to sidelink, etc.

[0109] Figure 8 A procedure of performing V2X or SL communication by a UE based on a resource allocation mode according to an embodiment of the disclosure is illustrated. Figure 8 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0110] Referring to Figure 8 In (a), under the resource allocation mode 1, the base station can schedule SL resources to be used for SL transmission by the UE. For example, in step S800, the base station can transmit information related to SL resources and / or information related to UL resources to the first UE. For example, the UL resources can include PUCCH resources and / or PUSCH resources. For example, the UL resources can be resources for reporting SL HARQ feedback to the base station.

[0111] For example, the first UE can receive information related to dynamic grant (DG) resources and / or information related to configured grant (CG) resources from the base station. For example, the CG resources can include CG type 1 resources or CG type 2 resources. In the disclosure, the DG resources can be resources configured / allocated to the first UE by the base station through downlink control information (DCI). In the disclosure, the CG resources can 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 can transmit 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 can transmit an RRC message including information related to the CG resources to the first UE, and the base station can transmit DCI related to activation or release of the CG resources to the first UE.

[0112] In step S810, the first UE can transmit a PSCCH (e.g., Sidelink Control Information (SCI) or a first stage SCI) to the second UE based on the resource scheduling. In step S820, the first UE can transmit a PSSCH (e.g., a second stage SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) can be received from the second UE through the PSFCH. In step S840, the first UE can transmit / report the HARQ feedback information to the base station through a PUCCH or a PUSCH. For example, the HARQ feedback information reported to the base station can 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 can be information generated by the first UE based on a preconfigured rule. For example, the DCI can be a DCI for SL scheduling.

[0113] Referring to Figure 8 (b), under resource allocation mode 2, the UE can determine a SL transmission resource within a SL resource configured by the base station / network or a preconfigured SL resource. For example, the configured SL resource or the preconfigured SL resource can be a resource pool. For example, the UE can autonomously select or schedule a resource for SL transmission. For example, the UE can perform SL communication by autonomously selecting a resource within a configured resource pool. For example, the UE can autonomously select a resource within a selection window by performing a sensing procedure and a resource (re)selection procedure. For example, sensing can be performed in units of subchannels. For example, in step S810, the first UE, which has selected a resource from a resource pool by itself, can transmit a PSCCH (e.g., Sidelink Control Information (SCI) or a first stage SCI) to the second UE by using the resource. In step S820, the first UE can transmit a PSSCH (e.g., a second stage SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0114] Referring to Figure 8of (a) or (b), for example, the first UE can transmit the SCI to the second UE through the PSCCH. Alternatively, for example, the first UE can transmit two consecutive SCIs (e.g., 2-stage SCI) to the second UE through the PSCCH and / or the PSSCH. In this case, the second UE can decode the two consecutive SCIs (e.g., 2-stage SCI) to receive the PSSCH from the first UE. In the disclosure, the SCI transmitted through the PSCCH can be referred to as a first SCI, a first SCI, a first-stage SCI, or a first-stage SCI format, and the SCI transmitted through the PSSCH can be referred to as a second SCI, a second SCI, a second-stage SCI, or a second-stage SCI format.

[0115] Referring to Figure 8 of (a) or (b), in step S830, the first UE can receive the PSFCH. For example, the first UE and the second UE can determine the PSFCH resource, and the second UE can transmit the HARQ feedback to the first UE using the PSFCH resource.

[0116] Referring to Figure 8 of (a), in step S840, the first UE can transmit the SL HARQ feedback to the base station through the PUCCH and / or the PUSCH.

[0117] Figure 9 An example of a wireless communication environment based on an embodiment of the disclosure is illustrated. Figure 9 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0118] Referring to Figure 9 , the first device (910), the second device (920), and the third device (930) are illustrated as 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 illustrated, but are not limited thereto.

[0119] According to the disclosure, the first device (910), the second device (920), and / or the third device (930) can transmit and receive a wireless signal in a millimeter wave (mmWave) band. For example, 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 directivity to a transmission signal or a reception signal. For example, the first device (910), the second device (920), and / or the third device (930) can select a serving beam (912, 913, 921, 931) through a beam search or a beam management procedure. After selecting the serving beam (912, 913, 921, 931), communication can be performed through resources that are quasi co-located (QCL) with resources in which the serving beam is transmitted.

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

[0121] For example, beam management operations in a millimeter wave frequency have recently been introduced into regular NR Uu (operations between a base station and a UE). For example, the beam management operations can include beam scheduling, beam selection, beam failure recovery, etc. In the disclosure, the beam management operations (e.g., beam failure recovery) are proposed as follows. For example, the following proposals can relate to beam management operations in NR. Also, the following proposals are not limited to NR. For example, the following proposals can relate to beam management operations in a sidelink. Also, the following proposals are not limited to a sidelink. For example, the following proposals can relate to beam management operations in an NR sidelink.

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

[0123] - Beam sweeping operation: A UE can perform an operation to find an optimal beam (e.g., a transmission beam, a reception beam) by sweeping a beam for communication. For example, communication during a beam sweeping operation can be a sidelink communication. For example, a UE can perform an operation to cover a spatial region using a transmission beam and / or a reception beam for a certain time interval based on a preconfigured scheme.

[0124] - Beam measurement operation: A UE can perform an operation to find a reference signal (RS) whose measurement value is greater than or equal to a threshold when measuring the RS transmitted by a peer UE.

[0125] - Beam selection operation: A UE can perform an operation to select an optimal beam (e.g., a transmission beam, a reception beam) based on a beam measurement result.

[0126] - Beam reporting operation: A UE can perform an operation to report a selected optimal beam to a peer UE or a base station.

[0127] - Beam pairing operation: A UE can perform an operation to synchronize (pair) beams (e.g., transmission beams / reception beams) between UEs, thereby enabling communication via inter-UE beams (e.g., transmission beams / reception beams).

[0128] Figure 10 A beam failure recovery procedure based on an embodiment of the disclosure is illustrated. Figure 10 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0129] Referring to Figure 10 When a UE has detected a failure of a beam for communication greater than or equal to a threshold, the UE can trigger a beam failure recovery procedure to recover the beam. For example, when a UE has detected a failure of a beam for a sidelink communication greater than or equal to a threshold, the UE can trigger a sidelink beam failure recovery procedure to recover the beam. For example, when a MAC layer of a UE has received a beam failure instance from a physical layer greater than or equal to a threshold, the UE can trigger a beam failure recovery procedure to recover the beam. For example, the MAC layer of the UE can perform a procedure to trigger the beam failure recovery procedure to recover the beam. For example, when a MAC layer of a UE has received a beam failure instance from a physical layer greater than or equal to a threshold, the UE can trigger a sidelink beam failure recovery procedure to recover the beam. For example, the MAC layer of the UE can perform a procedure to trigger the sidelink beam failure recovery procedure to recover the beam. The disclosure has been described with respect to a sidelink beam failure, but is not limited thereto. For example, the disclosure can be applied not only to a sidelink beam failure but also to a beam failure other than a sidelink beam failure.

[0130] In Figure 10In some embodiments, for example, the MAC layer can be configured by the RRC with a beam failure recovery procedure for indicating when a beam failure is detected. For example, a beam failure can be detected by counting beam failure instance indications from lower layers to the MAC entity. For example, the RRC can configure a beam failure instance maximum count and a beam failure detection timer. For example, the MAC entity can start or restart the beam failure detection timer if a beam failure instance indication has been received from lower layers. For example, the MAC entity can increment the beam failure instance counter by 1 if a beam failure instance indication has been received from lower layers. For example, the MAC entity can detect a beam failure if the beam failure instance counter is greater than or equal to the beam failure instance maximum count. For example, the MAC entity can trigger a beam failure recovery if the beam failure instance counter is greater than or equal to the beam failure instance maximum count. For example, the MAC entity can set the beam failure instance counter to zero if the beam failure detection timer expires.

[0131] In this disclosure, the following is proposed for the subsequent operation of the UE in case of (SL) BFR procedure failure.

[0132] When a beam failure recovery (BFR) is triggered, the UE can send a (SL) BFR MAC CE (e.g., to indicate a problem with the currently operating TX or RX beam, to indicate a problem with the reference signal related to the currently operating TX or RX beam, or to indicate the best TX or RX beam for the beam failure recovery triggered by the BFR) and also activate a (SL) BFR timer to start the (SL) BFR procedure. If the UE does not receive feedback (e.g., a (SL) BFR confirmation MAC CE or a HARQ ACK feedback) for the sent (SL) BFR MAC CE until the BFR timer expires, the UE can initiate the following procedures.

[0133] - The UE can retransmit the (SL) BFR MAC CE (e.g., to indicate a problem with the currently operating TX or RX beam, to indicate a problem with the reference signal related to the currently operating TX or RX beam, or to indicate the best TX or RX beam for the beam failure recovery triggered by the BFR) and retrigger the BFR procedure.

[0134] - The UE can consider the (SL) BFR procedure as failed, declare (SL) RLF with respect to the PC5 RRC connection that triggered the (SL) BFR, and report to the base station or the peer UE with a cause: (Sidelink) RLF based on (SL) beam failure recovery (BFR) failure.

[0135] - The UE can retrigger or re-perform at least one of the following operations: beam sweeping, beam selection, or beam pairing.

[0136] For example, a grant can be created based on a beam. For example, when a beam pairing procedure is triggered and a new beam (TX and / or RX beam) is determined, the UE can not be able to use a previously created grant if the newly determined beam (TX and / or RX beam) does not cover the TX and / or RX filter of the directional beam previously used for determining the sidelink grant.

[0137] Figure 11 Examples related to resource reselection based on embodiments of the disclosure are shown. Figure 11 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0138] Referring to Figure 11 At step S1110, if the MAC entity has selected to create a selected (sidelink) grant corresponding to the transmission of multiple MAC PDUs and (SL) data is available in a logical channel, the MAC entity can perform a TX resource (re)selection check for the selected resource pool at step S1120. For example, at step S1110, if the MAC entity has selected to create a selected (sidelink) grant corresponding to the transmission of a single MAC PDU and if (SL) data is available in a logical channel, the MAC entity can perform a TX resource (re)selection check for the selected resource pool at step S1120. At step S1130, the MAC entity can perform a TX resource (re)selection for a (sidelink) procedure if certain conditions are met. For example, if a TX resource (re)selection check procedure is triggered on the selected resource pool for a (sidelink) procedure, the MAC entity can proceed with a TX resource (re)selection for a (sidelink) procedure if certain conditions are met.

[0139] In the NR V2X resource reselection operation, the UE triggers a mode 2 resource reselection operation to perform resource reselection when the UE satisfies the following conditions.

[0140] For example, the TX resource (re)selection check can be as follows.

[0141] If a TX resource (re)selection check procedure is triggered on the selected resource pool for a (sidelink) procedure according to clause 5.22.1.1, the MAC entity can perform a TX resource (re)selection for a (sidelink) procedure:

[0142] 1> if the PSCCH duration and the second stage ((sidelink) control information) ((S)CI) for all transmissions of MAC PDU(s) for any selected (sidelink) grant(s) on PSCCH are not in the SL DRX active time specified in clause 5.28.3 for the destination(s) with data to transmit; or

[0143] 1> if SL_RESOURCE_RESELECTION_COUNTER = 0, and when SL_RESOURCE_RESELECTION_COUNTER is equal to 1, the MAC entity randomly selects a value in the interval [0, 1] with equal probability that is higher than the probability configured by RRC in sl-ProbResourceKeep; or

[0144] 1> if the resource pool is configured or reconfigured by RRC; or

[0145] 1> if it does not have a selected (sidelink) grant on the selected resource pool; or

[0146] 1> if the MAC entity did not perform a transmission nor a retransmission on any of the resources indicated in the selected (sidelink) grant during the last second; or

[0147] 1> if sl-ReselectAfter is configured and the number of consecutive unused transmission opportunities on the resources indicated in the selected (sidelink) grant equal to sl-ReselectAfter when no resources of the selected (sidelink) grant within the resource reservation interval are used, incremented by 1; or

[0148] 1> if the selected (sidelink) grant cannot accommodate the RLC SDU by using the maximum allowed MCS configured by RRC in sl-MaxMCS-PSSCH associated with the selected MCS table, and the UE selects not to segment the RLC SDU; or

[0149] NOTE 1: Whether to perform segmentation or (sidelink) resource reselection if the selected (sidelink) grant cannot accommodate the RLC SDU depends on UE implementation.

[0150] 1> if the transmission with the selected (sidelink) grant cannot meet the remaining PDB for data in a logical channel, and the MAC entity selects not to perform a transmission corresponding to a single MAC PDU:

[0151] NOTE 2: Whether to perform a transmission corresponding to a single MAC PDU or (sidelink) resource reselection if the remaining PDB is not met depends on UE implementation.

[0152] NOTE 3: Whether TX resource (re)selection is triggered due to the latency requirement of triggered MAC CEs according to clause 5.22.1.7 depends on UE implementation.

[0153] 2> clear the selected (sidelink) grant associated with the (sidelink) procedure, if available;

[0154] 2> trigger TX resource (re)selection.

[0155] In the disclosure, a resource reselection operation of a UE in (sidelink) FR2 is proposed as follows.

[0156] When transmitting (sidelink) data for (sidelink) FR2, the UE can determine a transmission beam or a reception beam for (sidelink) data transmission. When transmitting (sidelink) data for (sidelink) FR2, the UE can perform a beam pairing operation for (sidelink) data transmission (for example, the UE can determine a transmission beam / reception beam between a transmission UE and a reception UE, and transmit (sidelink) data through the determined transmission / reception beam). If a problem occurs in a beam (transmission beam or reception beam) currently used by the UE (transmission UE or reception UE) (for example, an RSRP measurement value for a transmission beam / transmission beam-related reference signal or a reception beam / reception beam-related reference signal is less than or equal to a threshold value, or a beam failure occurs greater than or equal to a threshold value for a currently used transmission beam / reception beam, or a failure in a (sidelink) beam failure recovery procedure), the UE can perform a beam pairing operation to re-determine / reselect a transmission beam or a reception beam. For example, when a new transmission beam or a reception beam is determined, the UE can perform (sidelink) communication using the determined transmission beam or reception beam. For example, the (sidelink) grant can be cleared or discarded.

[0157] For example, the UE can create a (sidelink) grant for (sidelink) data transmission. The UE can first select a (sidelink) resource pool for creating a (sidelink) grant, and can create a (sidelink) grant within the selected (sidelink) resource pool. For FR2 operation, when performing sensing to create and select a (sidelink) grant, the UE can perform sensing for a specific directional beam (transmission beam and / or reception beam) determined through a beam pairing procedure, and can select a (sidelink) grant having a free resource. When the UE selects a resource based on sensing for a specific directional beam and transmits (sidelink) data using the selected resource (for example, a (sidelink) grant or a (sidelink) resource pool related to the created (sidelink) grant), the UE can transmit (sidelink) data using only a directional beam applied to sensing a corresponding resource. For example, the (sidelink) grant can be cleared or discarded.

[0158] When the beam pairing procedure is triggered and a new beam (transmit beam and / or receive beam) is determined by the UE, if the newly determined beam (transmit beam and / or receive beam) does not cover (or does not support) the transmit filter and / or receive filter of the directional beam (transmit beam and / or receive beam) previously used for determining the (sidelink) grant, the UE can trigger a resource reselection operation and perform sensing based on the newly determined directional beam (transmit beam and / or receive beam) to reselect the (sidelink) grant. If the newly determined beam (transmit beam and / or receive beam) from the beam pairing procedure covers (or supports) the transmit filter and / or receive filter of the directional beam (transmit beam and / or receive beam) previously used for determining the (sidelink) grant, the UE can not trigger a resource reselection operation and can continue transmitting (sidelink) data using the resources selected based on the sensing performed with the previously used directional beam (transmit beam and / or receive beam). For example, the (sidelink) grant can be cleared or dropped.

[0159] According to an embodiment of the disclosure, when the quality (e.g., RSRP / SINR / RSRQ or Qout: when the BLER of all serving beams is higher than a threshold) of a specific beam or a specific beam-related reference signal resource decreases to be less than or equal to a preconfigured threshold, the UE can trigger (sidelink) grant resource reselection related to the specific beam or the specific beam-related reference signal resource, or clear or drop the (sidelink) grant.

[0160] According to an embodiment of the disclosure, when the UE performs transmission by applying a spatial TX filter different from a restricted spatial TX filter applied on resources related to the (sidelink) grant by a spatial RX filter used for sensing related to (sidelink) grant creation or by applying a spatial TX filter having a correlation less than or equal to a threshold with the restricted spatial TX filter, the UE can trigger (sidelink) grant resource reselection or clear or drop the (sidelink) grant.

[0161] According to an embodiment of the disclosure, when a spatial TX filter different from a restricted spatial TX filter applied on resources related to the (sidelink) grant by a spatial RX filter used for sensing related to (sidelink) grant creation or a spatial TX filter having a correlation less than or equal to a threshold with the restricted spatial TX filter is applied (or selected or mapped) to (sidelink) data transmission, the UE can trigger (sidelink) grant resource reselection or clear or drop the (sidelink) grant.

[0162] According to embodiments of the disclosure, when the UE performs transmission by applying a spatial TX filter different from a restricted spatial TX filter applied on a resource related to a (sidelink) grant with a spatial RX filter used for sensing related to (sidelink) grant creation or by applying a spatial TX filter having a correlation less than or equal to a threshold with the restricted spatial TX filter, the UE can perform a counting operation for parameters for a resource reselection operation (e.g., sl-ReselectAfter: can indicate a number of consecutive skipped transmissions before triggering resource reselection for (sidelink) communication, sl-MaxTxTransNumPSSCH: can indicate a maximum number of transmissions (including new transmissions and retransmissions) for PSSCH, sl-MaxTransNum: can indicate a maximum number of times of TBs transmitted using a resource provided by a configured grant. sl-Priority corresponds to a logical channel priority.) in the following manner.

[0163] - Method 1. An operation assuming that a resource has been used and not incrementing (or incrementing) a counter value.

[0164] - Method 2. An operation assuming that a resource has not been used and not incrementing (or incrementing) a counter value.

[0165] According to embodiments of the disclosure, the UE can create and select a (sidelink) grant based on a spatial RX filter used in sensing related to (sidelink) grant creation (e.g., performing sensing using a spatial RX filter and selecting a (sidelink) grant from an idle resource identified by a sensing result). For example, a transmission beam (e.g., a spatial TX filter) used by the UE to transmit (sidelink) data using the created and selected (sidelink) grant can be restricted by the spatial RX filter used for sensing related to (sidelink) grant creation. For example, since the spatial TX filter is restricted or constrained by a specific spatial RX filter, when the UE creates or selects another (sidelink) grant, if a mapping of the spatial RX filter used for a previous (sidelink) grant creation or a constrained spatial TX filter does not cover a mapping spatial TX filter of a spatial RX filter used for sensing a currently created or selected (sidelink) grant, the spatial RX filter and the spatial TX filter used in the previous (sidelink) grant creation cannot be used for the currently created or selected (sidelink) grant. In addition, when available data arrives at logical channels, the UE can select a destination (a destination layer 2 ID) of a logical channel having a highest priority among them and map the selected destination to a previously created (sidelink) grant. For example, the UE can transmit a MAC PDU generated for the selected destination using the mapped (sidelink) grant and a spatial TX filter related to the (sidelink) grant.

[0166] Further, the UE can perform the following logical channel prioritization operation.

[0167] The UE can filter only logical channel data (e.g., available data generated in a logical channel or MAC SDU) that can be covered by a spatial filter (e.g., a spatial TX filter) covered by the currently created (sidelink) grant, and select a destination of a logical channel having the highest priority among them. For example, the UE can filter only logical channel data (e.g., available data generated in a logical channel or MAC SDU) that can be covered with a spatial filter (e.g., a spatial TX filter) covered by the currently created (sidelink) grant, and select a destination of a logical channel having the highest priority among them.

[0168] For example, the UE can perform the following operation for logical channel data (e.g., available data generated in a logical channel or MAC SDU) that cannot use a spatial filter (e.g., a spatial TX filter) covered by the currently created (sidelink) grant.

[0169] For example, if all data on a logical channel is logical channel data (e.g., available data generated in a logical channel or MAC SDU generated in a logical channel) that cannot use a spatial filter (e.g., a spatial TX filter) covered by the currently created (sidelink) grant, the UE can perform a new (sidelink) grant creation procedure (or a reselection procedure of an existing (sidelink) grant). For example, by performing a new (sidelink) grant creation procedure (or a reselection procedure of an existing (sidelink) grant), the UE can create (or select) a (sidelink) grant based on sensing using a new spatial RX filter and a sensing result. For example, the UE transmits logical channel data using the created (or selected) (sidelink) grant, and can perform logical channel data transmission using a spatial TX filter constrained by the spatial RX filter.

[0170] - For example, if all data on the logical channel is logical channel data that cannot use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant (e.g., available data generated in the logical channel or MAC SDU generated in the logical channel), the UE can perform a procedure for creating a new (sidelink) grant (or a procedure for reselecting an existing (sidelink) grant). For example, instead of performing a new (sidelink) grant creation procedure, the UE can trigger a procedure for reselecting an existing (sidelink) grant, and reselect the (sidelink) grant based on sensing using the new spatial RX filter and sensing results. For example, the UE transmits the logical channel data using the reselected (sidelink) grant, and can use the spatial TX filter constrained by the spatial RX filter for the logical channel data transmission. For example, by performing a new (sidelink) grant creation procedure, the UE can create a (sidelink) grant based on sensing using the new spatial RX filter and sensing results. For example, the UE transmits the logical channel data using the created (sidelink) grant, and can use the spatial TX filter constrained by the spatial RX filter for the logical channel data transmission. For example, if all data in the logical channel is logical channel data that cannot use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant (e.g., available data generated in the logical channel or MAC SDU generated in the logical channel), the UE can trigger a procedure for reselecting a previously selected (sidelink) grant.

[0171] - For example, if some data in a logical channel is logical channel data (e.g., available data or MAC SDU generated in a logical channel) that cannot use a spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can perform a new (sidelink) grant creation procedure (or a reselection procedure of an existing (sidelink) grant) for the logical channel data that cannot use the spatial filter covered by the currently created (sidelink) grant. For example, the UE can perform a new (sidelink) grant creation procedure (or a procedure for reselecting an existing (sidelink) grant) for creating a (sidelink) grant based on a sensing result obtained by sensing based on a new spatial RX filter. For example, the UE can transmit the logical channel data using the newly created (sidelink) grant and use a spatial TX filter restricted by the spatial RX filter during the logical channel data transmission. For example, for logical channel data (e.g., available data or MAC SDU generated in a logical channel) that can use a spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can select a destination of a logical channel having a highest logical channel priority, generate a MAC PDU, and transmit the logical channel data using the spatial filter covered by the currently created (sidelink) grant and the created (sidelink) grant.

[0172] - For example, if some of the data in the logical channel is logical channel data (e.g., available data generated in the logical channel or MAC SDU) that cannot use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can perform a new (sidelink) grant creation procedure (or a reselection procedure of an existing (sidelink) grant) for the logical channel data that cannot use the spatial filter covered by the currently created (sidelink) grant. For example, the UE can trigger a reselection procedure for an existing (sidelink) grant to reselect a (sidelink) grant based on a sensing result obtained by sensing based on a new spatial RX filter, instead of performing a new (sidelink) grant creation procedure. For example, the UE can transmit the logical channel data using the reselected (sidelink) grant and can use a spatial TX filter restricted by the spatial RX filter during the logical channel data transmission. For example, for logical channel data (e.g., available data generated in the logical channel or MAC SDU) that can use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can select a destination of a logical channel having a highest logical channel priority, generate a MAC PDU, and transmit the logical channel data using the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant and the created (sidelink) grant.

[0173] - For example, according to an embodiment of the disclosure, if data in a logical channel is logical channel data (e.g., available data generated in the logical channel or MAC SDU) that cannot use a spatial filter (e.g., spatial TX filter) covered by a currently created (sidelink) grant, the UE can allow transmission of the logical channel data using the spatial filter (e.g., spatial TX filter) that is not covered in the following exceptional case:

[0174] - when the (sidelink) data has the highest (sidelink) priority or the (sidelink) TB / data has a (sidelink) priority greater than a preconfigured threshold.

[0175] - when the (sidelink) TB / data has a remaining packet delay budget less than or equal to a preconfigured threshold.

[0176] For example, according to an embodiment of the disclosure, if the data in the logical channel is logical channel data (e.g., available data or MAC SDU generated in the logical channel) that cannot use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can discard the logical channel data and ignore or discard the previously created or (re)selected (sidelink) grant. For example, according to an embodiment of the disclosure, if the data in the logical channel is logical channel data (e.g., available data or MAC SDU generated in the logical channel) that cannot use the spatial filter (e.g., spatial TX filter) covered by the currently created (sidelink) grant, the UE can ignore or discard the previously created or (re)selected (sidelink) grant. For example, the UE can report NACK (or ACK) to the base station via PUCCH.

[0177] With beam-specific resource allocation, the system can ensure efficient utilization of available resources. The use of beam-specific grants allows precise targeting of data transmission, reducing interference to intended recipients and improving signal quality. By switching to alternative resources when beam-based grants are unavailable, the system can prevent potential degradation of communication performance, ensuring a consistent user experience.

[0178] For example, if the reserved resource (e.g., the UE can receive (sidelink) control information ((S)CI) from a peer UE, and identify the reserved resource of the peer UE based on the resource reservation information included in the received (S)CI) is a location where a packet related to the UE or a service of interest or a packet intended to be received by the UE itself is transmitted (and / or if the resource selected for transmission to the UE carries a packet that the UE should receive or be interested in related to the reserved resource, and / or if in the (sidelink) control information ((S)CI) related to the reserved resource (or related to the packet to be transmitted by the UE), a flag indicating antenna / beam switching-related processing time is set to 1), the UE can perform the following operations.

[0179] 1) If the priority related to the reserved resource (e.g., Layer-1 (sidelink) priority included in the (sidelink) control information ((S)CI) received from the peer UE) is greater than the priority related to the transmission resource selected by the UE, or greater than a pre-configured threshold (or regardless of the priority related to the reserved resource and the priority related to the transmission resource selected by the UE), the UE can exclude the candidate resource in the subsequent slot from its transmission resource selection. For example, if the priority related to the reserved resource does not satisfy this condition, the candidate resource in the subsequent slot can be selected, in which case the UE can skip the packet reception on the reserved resource or skip its own packet transmission on the selected transmission resource in the subsequent slot.

[0180] 2) The UE randomly selects from the idle resource candidates according to the mode-2 resource selection, and if the selected transmission resource is in the slot after the reserved resource,

[0181] a) The UE can skip the packet reception on the reserved resource or skip the packet transmission on the slot after the reserved resource.

[0182] b) If the priority related to the packet reception on the reserved resource is greater than the priority related to the packet transmission in the subsequent slot of the reserved resource (or if the priority related to the packet reception on the reserved resource is greater than or equal to a pre-configured threshold, or if the priority related to the packet transmission in the subsequent slot is less than or equal to a pre-configured threshold), the UE can perform the packet reception on the reserved resource and skip the packet transmission in the subsequent slot. For example, if the opposite case occurs, the UE can skip the packet reception on the reserved resource and perform the packet transmission in the subsequent slot.

[0183] For example, if the reserved resource is a location where the packet related to the UE or the service of interest to the UE should be received (and / or if the transmission resource selected by the UE carries the packet related to the reserved resource that the UE is interested in or is to receive, and / or if a flag indicating the antenna / beam switching processing time is required in the reserved resource related (sidelink) control information ((S)CI)),

[0184] 1) If the reserved resource related priority is greater than the priority related to the transmission resource selected by the UE, or greater than a pre-configured priority threshold (or regardless of the reserved resource related priority and the priority related to the transmission resource selected by the UE), the UE can exclude the selection of its transmission resource in the previous slot. For example, if the reserved resource related priority does not satisfy this condition, the UE can select the candidate resource in the previous slot, and in this case, the UE can skip the packet reception on the reserved resource or skip its packet transmission on the selected transmission resource in the previous slot.

[0185] 2) When selecting resources in mode 2, the UE randomly selects from the idle resource candidates, and if the selected transmission resource is in a slot before the reserved resource, then

[0186] a) The UE can skip packet reception on the reserved resource or skip packet transmission in the slot before the reserved resource.

[0187] b) If the priority related to packet reception on the reserved resource is greater than the priority related to packet transmission in the slot before the reserved resource (or if the priority related to packet reception on the reserved resource is greater than or equal to a preconfigured threshold or the priority related to the packet in the previous slot is less than or equal to a preconfigured threshold), the UE can perform packet reception on the reserved resource and skip packet transmission in the previous slot. For example, if the opposite condition occurs, the UE can skip packet reception on the reserved resource and instead perform packet transmission in the previous slot.

[0188] For example, the resource selection of the UE can be performed independently based on mode 2, and for the transmission resource in the slot immediately before or after the reserved resource, the antenna / beam switching related processing time (for example, which can be interpreted as performing the transmission / reception operation in the slot before or after the reserved resource using the same spatial filter / antenna (port)) is not required, only transmission such as LCH data or MAC CE can be limited to be selected in the logical channel priority ordering (LCP: MAC PDU generation procedure) process. (Specifically, if the priority related to the reserved resource is greater than or equal to a preconfigured threshold, or if the priority related to the reserved resource is greater than the priority of the transmission resource in the previous slot or the next slot, or if the UE needs to receive the transmission resource in the previous slot or the next slot related to the reserved resource, or if the UE needs to perform the reception operation on the reserved resource related to the transmission in the previous slot or the next slot)

[0189] For example, when the UE selects / reserves resources requiring beam / antenna (port) switching, a gap (e.g., one slot) can be ensured between the previously reserved / selected transmission resources and the subsequently reserved / selected resources (e.g., resources for packet transmission with a relatively higher priority are first selected / reserved, and then resources for remaining packet transmission are selected / reserved in a manner of ensuring a gap), or after performing resource selection based on mode 2, if resources requiring beam / antenna (port) switching are selected / reserved in adjacent slots, packet transmission with a relatively lower priority can be skipped, or subsequent (or previous) packet transmission can be skipped, or resource reselection (e.g., reselection of resources related to packet transmission with a relatively lower priority) can be triggered (or can not be triggered) until a gap is ensured. For example, if resources requiring beam / antenna (port) switching are selected / reserved in adjacent slots, packet transmission requiring no beam / antenna (port) switching between the resources can be preferentially selected in an LCP procedure.

[0190] For example, UE operation upon Uu beam failure can be proposed.

[0191] In the disclosure, when Uu beam failure between a base station and a UE occurs greater than or equal to a threshold, a triggered Uu beam failure recovery (Uu BFR) procedure, a triggered (or pending) (sidelink) scheduling request (SR), and a triggered (or pending) (sidelink) buffer status report (BSR) can be cancelled.

[0192] In an embodiment of the disclosure, "reserved resources" can refer to resources of a peer UE identified by receiving (sidelink) control information ((S)CI) transmitted by the peer UE. For example, it can refer to resources reserved by a transmitting UE for retransmission of a PSSCH.

[0193] In an embodiment of the disclosure, "reserved resources" can be interpreted as resources reserved by a peer UE for transmission, and a UE can identify "reserved resources" of the peer UE by decoding (sidelink) control information ((S)CI) transmitted from the peer UE and checking reserved resource information included in the received (S)CI.

[0194] The operation of the disclosure can be applied to all (sidelink) unicast, groupcast, and broadcast operations.

[0195] In various embodiments of the disclosure, "channel" can be applied by replacing "carrier" or "resource block set of a specific carrier" or "frequency band".

[0196] In an embodiment of the disclosure, a beam management operation can be interchangeably interpreted as a beam selection, a spatial filter selection, a beam pairing, a spatial filter pairing, a beam failure recovery (BFR), a spatial filter recovery, a beam sweeping, a spatial filter sweeping, a beam switching, a spatial filter switching, a reference signal (RS) resource measurement, a RS resource measurement reporting, a beam reporting, a spatial filter reporting, etc.

[0197] In an embodiment of the disclosure, a beam can be interchangeably interpreted as a RS, a RS resource, or a spatial filter resource.

[0198] In an embodiment of the disclosure, a RS can be interchangeably interpreted as a RS resource or a spatial filter resource.

[0199] In an embodiment of the disclosure, a transmitting UE can be interchangeably interpreted as a UE transmitting a beam, a UE transmitting a beam RS, or a UE transmitting a beam RS resource.

[0200] In an embodiment of the disclosure, a receiving UE can be interchangeably interpreted as a UE receiving a beam, a UE receiving a beam RS, or a UE receiving a beam RS resource.

[0201] In an embodiment of the disclosure, information for a transmitting beam or a receiving beam transmitted / received by a UE can be interchangeably interpreted as resource information of a reference signal (RS) related to a transmitting beam and resource information of a RS related to a receiving beam.

[0202] In an embodiment of the disclosure, a direct communication request (DCR) message and / or a direct communication accept (DCA) message can be interchangeably interpreted as a PC5-S (sidelink) DCR message and / or a PC5-S (sidelink) DCA message.

[0203] In an embodiment of the disclosure, although a (SL) CSI-RS is exemplified as a RS for beam management, it is not limited thereto. The proposed operations in the disclosure can be equally extended and applied to a case where other reference signals (RSs) (e.g., (sidelink) SSB) other than the (SL) CSI-RS are used for beam management.

[0204] In an embodiment of the disclosure, although a RSRP is exemplified as a RS measurement for beam management, it is not limited thereto. The proposed operations in the disclosure can be equally extended and applied to other measurement operations (e.g., a received signal strength indicator (RSSI) measurement) of a RS measurement for beam management.

[0205] In embodiments of the disclosure, spatial setting and / or transmission configuration indicator (TCI) information and / or quasi co-location (QCL) information and / or beam can refer to each other and / or can be interchangeably interpreted as beam-related information, beam direction, spatial domain transmission filter, and / or spatial domain reception filter. For example, the spatial domain transmission filter can be a spatial domain TX filter. For example, the spatial domain reception filter can be a spatial domain RX filter.

[0206] In embodiments of the disclosure, beam can be interchangeably interpreted as spatial filter.

[0207] In embodiments of the disclosure, transmission / transmit beam can be interchangeably interpreted as spatial transmission (TX) filter or spatial domain transmission (TX) filter.

[0208] In embodiments of the disclosure, beam can be interchangeably interpreted as transmission beam, reception beam, spatial filter, spatial transmission (TX) filter, spatial domain transmission (TX) filter, spatial reception (RX) filter, or spatial domain reception (RX) filter.

[0209] In embodiments of the disclosure, reception beam can be interchangeably interpreted as spatial reception (RX) filter or spatial domain reception (RX) filter.

[0210] In embodiments of the disclosure, spatial setting information (or beam information) being the same for transmission can mean that the UE’s spatial domain TX filter is the same for two different transmission signals. In embodiments of the disclosure, spatial setting information (or beam information) being the same for reception can mean that two different reception signals are in a QCL “Type D” relationship and / or use the same spatial RX parameters.

[0211] For example, whether to apply the proposed method(s) and / or rules of the disclosure and / or related parameters (e.g., thresholds) can be configured (differently or independently) for each SL-channel access priority class (CAPC). For example, whether to apply the proposed method(s) and / or rules of the disclosure and / or related parameters (e.g., thresholds) can 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, whether to apply the proposed method(s) and / or rules of the disclosure and / or related parameters (e.g., thresholds) can be specifically (or differently or independently) configured according to whether to apply frame-based LBT. For example, whether to apply the proposed method(s) and / or rules of the disclosure and / or related parameters (e.g., thresholds) can be specifically (or differently or independently) configured according to whether to apply load-based LBT.

[0212] For example, whether to apply the proposed scheme / rules of this disclosure and / or related parameters (e.g., thresholds) can be configured specifically (or differently or independently) based on whether LBT succeeds / fails, per LBT related energy detection level, per sidelink channel (PSCCH / PSSCH, PSFCH, SL-SSB (or S-SSB)), based on whether MCSt (multi-consecutive slot transmission) is applied, based on whether multiple PSFCH occasions are applied, based on whether resources are composed of MCSt in terms of order / location, based on whether multiple starting points are configured within one slot, based on whether the first starting point (or the second starting point) is applied, etc.

[0213] For example, whether to apply the proposed scheme / rules of this disclosure and / or related parameters (e.g., thresholds) can be configured specifically (or differently or independently) based on whether LBT succeeds / fails, per LBT related energy detection level, per sidelink channel (PSCCH / PSSCH, PSFCH, SL-SSB (or S-SSB)), based on whether MCSt (multi-consecutive slot transmission) is applied, based on whether multiple PSFCH occasions are applied, based on whether resources are composed of MCSt in terms of order / location, based on whether multiple starting points are configured within one slot, based on whether the first starting point (or the second starting point) is applied, etc.

[0214] For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per resource pool. For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per congestion level. For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per service priority. For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per service type. For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per QoS requirement (e.g., latency, reliability). For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per PQI (5G QoS Identifier (5QI) for PC5). For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per traffic type (e.g., periodically generated or aperiodically generated). For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per SL transmission resource allocation mode (e.g., Mode 1 or Mode 2). For example, whether to apply the proposed method / rule(s) of the present disclosure and / or related parameters (e.g., threshold) can be configured (differently or independently) per Tx profile (e.g., Tx profile indicating that the service supports sidelink DRX operation or Tx profile indicating that the service does not need to support sidelink DRX operation).

[0215] For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) according to whether PUCCH configuration is supported. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) when PUCCH resource is configured. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) when PUCCH resource is not configured. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for each resource pool. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for 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 configured specifically (and / or independently and / or differently) for resource pool not configured with PSFCH. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for specific sidelink logical channel. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for specific sidelink logical channel group. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for specific Uu logical channel. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for 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 configured specifically (and / or independently and / or differently) according to service / packet type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) according to service / packet priority. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for each QoS profile. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for QoS requirement. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for QoS requirement related to URLLC / EMBB traffic. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for reliability related QoS requirement.For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for latency related QoS requirements. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for PQI. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for PFI. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for cast type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for unicast cast type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for groupcast cast type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for broadcast cast type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for congestion level of resource pool. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for CBR. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for SL HARQ feedback type. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for NACK only HARQ feedback. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for ACK / NACK HARQ feedback. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for MAC PDU transmission with HARQ feedback enabled. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for MAC PDU transmission with HARQ feedback disabled. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) depending on whether PUCCH based SL HARQ feedback reporting operation is configured or not. For example, whether to apply the proposed rules and / or related parameter configuration values of the present disclosure can be configured specifically (and / or independently and / or differently) for L1 source identifier when pre-emption is performed.For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 source identifiers when pre-emption is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 destination identifiers when pre-emption is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 source identifiers when pre-emption is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 destination identifiers when pre-emption is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 source identifiers when pre-emption based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 destination identifiers when pre-emption based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 source identifiers when pre-emption based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 destination identifiers when pre-emption based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 source identifiers when re-evaluation is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 destination identifiers when re-evaluation is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 source identifiers when re-evaluation is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 destination identifiers when re-evaluation is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 source identifiers when re-evaluation based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L1 destination identifiers when re-evaluation based resource reselection is performed. For example, whether or not the proposed rules of the present disclosure and / or related parameter configuration values are applied can be configured specifically (and / or independently and / or differently) for L2 source identifiers when re-evaluation based resource reselection is performed.For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for L2 destination identifiers when performing re-evaluation based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L1 source and destination IDs when performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L2 source and destination IDs when performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L1 source and destination ID pairs and combinations of broadcast types when performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L2 source and destination ID pairs and combinations of broadcast types when performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L1 source and destination ID pairs and combinations of broadcast types when performing pre-emption based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L2 source and destination ID pairs and combinations of broadcast types when performing pre-emption based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to L1 source and destination ID pairs and combinations of broadcast types when performing re-evaluation.For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a combination of L2 source ID and destination ID pair and cast type at the time of performing re-evaluation. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a combination of L1 source ID and destination ID pair and cast type at the time of performing re-evaluation-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a combination of L2 source ID and destination ID pair and cast type at the time of performing re-evaluation-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L1 source ID and destination ID pair at the time of performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L2 source ID and destination ID pair at the time of performing pre-emption. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L1 source ID and destination ID pair at the time of performing pre-emption-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L2 source ID and destination ID pair at the time of performing pre-emption-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L1 source ID and destination ID pair at the time of performing re-evaluation. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L2 source ID and destination ID pair at the time of performing re-evaluation. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L1 source ID and destination ID pair at the time of performing re-evaluation-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for identifiers related to a direction of L2 source ID and destination ID pair at the time of performing re-evaluation-based resource reselection. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for PC5 RRC connection.For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for a PC5 RRC link. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type when SL DRX is performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 1 when SL DRX is performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 2 when SL DRX is performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type when SL DRX is supported. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 1 when SL DRX is supported. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 2 when SL DRX is supported. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type when SL DRX is not performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 1 when SL DRX is not performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 2 when SL DRX is not performed. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type when SL DRX is not supported. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 1 when SL DRX is not supported. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a SL mode type associated with resource allocation mode 2 when SL DRX is not supported.For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for periodic resource reservations. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for aperiodic resource reservations. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) based on a transmission (Tx) profile. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for a Tx profile indicating a service that supports sidelink DRX operation. For example, whether to apply the proposed rules of the present disclosure and / or related parameter configuration values can be configured specifically (and / or independently and / or differently) for a Tx profile indicating a service that does not need to support sidelink DRX operation.

[0216] The proposals and whether to apply the proposed rules of the present disclosure (and / or related parameter configuration values) can also apply to millimeter wave SL operation.

[0217] Figure 12 A method for a first apparatus to perform wireless communication based on an embodiment of the present disclosure is shown. Figure 12 Embodiments of the present disclosure can be combined with various embodiments of the present disclosure.

[0218] Referring to Figure 12 At step S1210, the first apparatus can create a first grant based on a first beam for the second apparatus. At step S1220, the first apparatus can transmit control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam. At step S1230, the first apparatus can transmit data on the physical shared channel to the second apparatus according to the first grant created based on the first beam. At step S1240, the first apparatus can trigger resource reselection according to the first grant created based on the first beam being unavailable.

[0219] For example, a second beam for the second apparatus can be determined based on a beam pairing with the second apparatus having been triggered. For example, the first grant can be unavailable based on the second beam being unrelated to the first beam used to create the first grant.

[0220] For example, the second beam being unrelated to the first beam used to create the first grant can be a state in which a spatial filter of the first beam used to create the first grant does not cover or support a spatial filter of the second beam.

[0221] For example, the spatial filter of the first beam can be at least one of a spatial TX filter of the first beam or a spatial RX filter of the first beam. For example, the spatial filter of the second beam can be at least one of a spatial TX filter of the second beam or a spatial RX filter of the second beam.

[0222] For example, based on the resource reselection having been triggered, the first grant can be reselected based on the third beam for the second apparatus.

[0223] For example, based on the resource reselection having been triggered, the second grant can be created based on the third beam for the second apparatus.

[0224] For example, based on the resource quality for the reference signal related to the first beam being less than a threshold, the first grant created based on the first beam can be unavailable.

[0225] For example, in accordance with the first grant created based on the first beam being unavailable, the first grant can be cleared.

[0226] For example, based on data in the logical channel being unavailable in the first grant created based on the first beam, the resource reselection can be triggered.

[0227] For example, the second grant can be created for the data in the logical channel.

[0228] For example, based on the data in the logical channel being unavailable, the first grant can be reselected.

[0229] For example, based on the data in the logical channel being unavailable in the first grant created based on the first beam, the first grant can be cleared.

[0230] For example, based on the first beam, the first grant can be generated in a sidelink resource pool. For example, the first grant can be a sidelink grant. For example, the physical control channel can be a physical sidelink control channel (PSCCH). For example, the physical shared channel can be a physical sidelink shared channel (PSSCH). For example, the control information can be sidelink control information (SCI).

[0231] The proposed method can be applied to an apparatus based on various embodiments of the disclosure. First, the processor 102 of the first apparatus 100 can create a first grant based on a first beam for a second apparatus. In addition, the processor 102 of the first apparatus 100 can control the transceiver 106 to transmit control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam. In addition, the processor 102 of the first apparatus 100 can control the transceiver 106 to transmit data on the physical shared channel to the second apparatus according to the first grant created based on the first beam. In addition, the processor 102 of the first apparatus 100 can trigger resource reselection according to the first grant created based on the first beam being unavailable.

[0232] Based on embodiments of the disclosure, a first apparatus adapted to perform wireless communication can be provided. For example, the first apparatus can include at least one transceiver, at least one processor, and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, can cause the first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second apparatus according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0233] Based on embodiments of the disclosure, a processing apparatus adapted to control a first apparatus can be provided. For example, the processing apparatus can include at least one processor and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, can cause the first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting control information for scheduling a physical shared channel on a physical control channel to the second apparatus according to the first grant created based on the first beam, transmitting data on the physical shared channel to the second apparatus according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0234] Based on embodiments of the disclosure, a non-transitory computer-readable storage medium storing instructions can be provided. For example, the instructions, based on being executed, can cause a first apparatus to perform operations including creating a first grant based on a first beam for a second apparatus, transmitting, to the second apparatus, control information for scheduling a physical shared channel on a physical control channel according to the first grant created based on the first beam, transmitting, to the second apparatus, data on the physical shared channel according to the first grant created based on the first beam, and triggering resource reselection according to the first grant created based on the first beam being unavailable.

[0235] Figure 13 A method for a second apparatus to perform wireless communication based on embodiments of the disclosure is shown. Figure 13 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0236] Referring to Figure 13 At step S1310, the second apparatus can receive, from the first apparatus, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam for the second apparatus by the first apparatus. At step S1320, the second apparatus can receive, from the first apparatus, data on the physical shared channel according to the first grant created based on the first beam. For example, resource reselection can be triggered according to the first grant created based on the first beam being unavailable.

[0237] For example, a second beam for the second apparatus can be determined based on beam pairing with the second apparatus having been triggered. For example, the first grant can be unavailable based on the second beam being unrelated to the first beam used to create the first grant.

[0238] For example, the second beam being unrelated to the first beam used to create the first grant can be a state in which a spatial filter of the first beam does not cover or support a spatial filter of the second beam.

[0239] For example, the spatial filter of the first beam can be at least one of a spatial TX filter of the first beam or a spatial RX filter of the first beam. For example, the spatial filter of the second beam can be at least one of a spatial TX filter of the second beam or a spatial RX filter of the second beam.

[0240] For example, the first grant can be reselected based on a third beam for the second apparatus based on resource reselection having been triggered.

[0241] For example, a second grant can be created based on a third beam for the second apparatus based on resource reselection having been triggered.

[0242] For example, the first grant created based on the first beam can be unavailable based on a resource quality for a reference signal related to the first beam being less than a threshold.

[0243] For example, the first grant can be cleared according to the first grant created based on the first beam being unavailable.

[0244] For example, a resource reselection can be triggered based on data in a logical channel being unavailable in the first grant created based on the first beam.

[0245] For example, a second grant can be created for the data in the logical channel.

[0246] For example, the first grant can be reselected based on the data in the logical channel being unavailable.

[0247] For example, the first grant can be cleared based on the data in the logical channel being unavailable in the first grant created based on the first beam.

[0248] For example, the first grant can be generated in a sidelink resource pool based on the first beam. For example, the first grant can be a sidelink grant. For example, the physical control channel can be a physical sidelink control channel (PSCCH). For example, the physical shared channel can be a physical sidelink shared channel (PSSCH). For example, the control information can be sidelink control information (SCI).

[0249] The proposed method can be applied to an apparatus based on various embodiments of the disclosure. First, the processor 202 of the second apparatus 200 can control the transceiver 206 to receive control information for scheduling a physical shared channel from a first apparatus on a physical control channel according to a first grant created by the first apparatus based on a first beam for the second apparatus. In addition, the processor 202 of the second apparatus 200 can control the transceiver 206 to receive data from the first apparatus on the physical shared channel according to the first grant created based on the first beam. For example, a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

[0250] Based on the embodiments of the disclosure, a second device suitable for performing wireless communication can be provided. For example, the second device can include at least one transceiver, at least one processor, and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, can cause the second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, based on the first grant created based on the first beam being unavailable, resource reselection is triggered.

[0251] Based on the embodiments of the disclosure, a processing device suitable for controlling a second device can be provided. The processing device can include at least one processor and at least one memory connected to the at least one processor and storing instructions. For example, the instructions, based on being executed by the at least one processor, can cause the second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, based on the first grant created based on the first beam being unavailable, resource reselection is triggered.

[0252] Based on the embodiments of the disclosure, a non-transitory computer-readable storage medium storing instructions can be provided. For example, the instructions, based on being executed, can cause the second device to perform operations including receiving, from a first device, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first device for the second device, and receiving, from the first device, data on the physical shared channel according to the first grant created based on the first beam. For example, based on the first grant created based on the first beam being unavailable, resource reselection is triggered.

[0253] Various embodiments of the disclosure can be combined with each other.

[0254] Hereinafter, a device to which various embodiments of the disclosure can be applied will be described.

[0255] Various descriptions, functions, processes, proposals, methods, and / or operation flows of the disclosure described herein can be applied to, but are not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0256] Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings / description, the same reference numerals can denote the same or corresponding hardware blocks, software blocks, or functional blocks unless otherwise described.

[0257] Figure 14 A communication system 1 based on an embodiment of the disclosure is shown. Figure 14 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0258] Referring to Figure 14 The communication system 1 to which various embodiments of the disclosure are applied includes wireless devices, base stations (BSs), and networks. Herein, a wireless device denotes a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)) and can be referred to as a communication / radio / 5G device. The wireless device can include, without being 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, the vehicle can include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, the vehicle can include an unmanned aerial vehicle (UAV) (e.g., a drone) and / or an aerial vehicle (AV) (e.g., an advanced air mobile (AAM)). The XR device can include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and can be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. The handheld device can include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smartglasses), and a computer (e.g., a notebook). The home appliance can include a TV, a refrigerator, and a washing machine. The IoT device can include a sensor and a smartmeter. For example, the BS and the network can be implemented as a wireless device, and a specific wireless device 200a can operate as a BS / network node with respect to other wireless devices.

[0259] Here, in addition to LTE, NR, and 6G, a wireless communication technology implemented in the wireless devices 100a to 100f of the disclosure can also include a narrowband Internet of Things for low-power communication. In this case, for example, the NB-IoT technology can be an example of a low-power wide-area network (LPWAN) technology, and can be implemented as a standard 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 disclosure can perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology can be an example of a LPWAN, and can be referred to by various names including enhanced machine type communication (eMTC) or the like. For example, the LTE-M technology can be implemented as at least any 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 disclosure can include at least one of Bluetooth, low-power wide-area network (LPWAN), and ZigBee considering low-power communication, without being limited to the above names. As an example, the ZigBee technology can generate a personal area network (PAN) related to small / low-power digital communication based on various standards including IEEE 802.15.4 or the like, and can be referred to by various names.

[0260] The wireless devices 100a to 100f can be connected to the network 300 via the BS 200. The AI technology can be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f can be connected to the 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 the wireless devices 100a to 100f can communicate with each other through the BS 200 / network 300, the wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) between each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). The IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0261] The wireless communication / connection 150a, 150b, or 150c can be established between the wireless devices 100a to 100f / BS 200 or the BS 200 / BS 200. Here, the wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless devices and the BS / wireless devices can transmit / receive radio signals to / from each other through the wireless communication / connection 150a and 150b. For example, the wireless communication / connection 150a and 150b can transmit / receive signals through various physical channels. To this end, at least a part of various configuration information configuration procedures for transmitting / receiving radio signals, various signal processing procedures (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation procedures can be performed based on various proposals of the disclosure.

[0262] Figure 15 A wireless device based on the embodiments of the disclosure is illustrated. Figure 15 The embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0263] Referring to 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} can correspond to {the wireless device 100x and the BS 200} and / or {the wireless device 100x and the wireless device 100x} in Figure 14

[0264] ​The first wireless device 100 can include one or more processors 102 and one or more memories 104, and can additionally include one or more transceivers 106 and / or one or more antennas 108. The processor(s) 102 can control the memory(ies) 104 and / or the transceiver(s) 106, and can be configured to implement the descriptions, functions, procedures, proposals, methods and / or operational flows disclosed in the present document. For example, the processor(s) 102 can process information in the memory(ies) 104 to generate first information / signals, and then transmit radio signals including the first information / signals through the transceiver(s) 106. The processor(s) 102 can receive radio signals including second information / signals through the transceiver(s) 106, and then store information obtained by processing the second information / signals in the memory(ies) 104. The memory(ies) 104 can be connected to the processor(s) 102, and can store various information related to the operation of the processor(s) 102. For example, the memory(ies) 104 can store software code including commands for executing a part or the whole of processes controlled by the processor(s) 102 or for executing the descriptions, functions, procedures, proposals, methods and / or operational flows disclosed in the present document. Here, the processor(s) 102 and the memory(ies) 104 can be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 can be connected to the processor(s) 102, and transmit and / or receive radio signals through the antenna(s) 108. Each transceiver 106 can include a transmitter and / or a receiver. The transceiver(s) 106 can be used interchangeably with Radio Frequency (RF) units. In the present disclosure, a wireless device can represent a communication modem / circuit / chip.

[0265] The second wireless device 200 can include one or more processors 202 and one or more memories 204, and can additionally include one or more transceivers 206 and / or one or more antennas 208. The processor(s) 202 can control the memory(ies) 204 and / or the transceiver(s) 206, and can be configured to implement the descriptions, functions, procedures, proposals, methods and / or operational flows disclosed in the present document. For example, the processor(s) 202 can process information in the memory(ies) 204 to generate third information / signals, and then transmit radio signals including the third information / signals through the transceiver(s) 206. The processor(s) 202 can receive radio signals including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(ies) 204. The memory(ies) 204 can be connected to the processor(s) 202, and can store various information related to the operation of the processor(s) 202. For example, the memory(ies) 204 can store software code including commands for executing a part or the whole of processes controlled by the processor(s) 202 or for executing the descriptions, functions, procedures, proposals, methods and / or operational flows disclosed in the present document. Here, the processor(s) 202 and the memory(ies) 204 can be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 can be connected to the processor(s) 202, and transmit and / or receive radio signals through the antenna(s) 208. Each transceiver 206 can include a transmitter and / or a receiver. The transceiver(s) 206 can be used interchangeably with RF unit(s). In the present disclosure, a wireless device can represent a communication modem / circuitry / chip.

[0266] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers can be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 can 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 can generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) based on the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document. One or more processors 102 and 202 can generate messages, control information, data, or information based on the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document. One or more processors 102 and 202 can generate signals (e.g., baseband signals) including the PDUs, SDUs, messages, control information, data, or information based on the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206, and acquire the PDUs, SDUs, messages, control information, data, or information based on the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document.

[0267] One or more processors 102 and 202 can be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 can 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) can be included in one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document can be implemented using firmware or software, and the firmware or software can be configured to include modules, procedures, or functions. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document can be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 so as to be driven by one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in the present document can be implemented using software or firmware in the form of codes, commands, and / or command sets.

[0268] One or more memories 104 and 204 can be connected to the one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104 and 204 can be comprised of read-only memory (ROM), random-access memory (RAM), electrically programmable read-only memory (EPROM), flash memory, a hard drive, a register, a cache memory, a computer readable storage medium, and / or a combination thereof. The one or more memories 104 and 204 can be internal and / or external to the one or more processors 102 and 202. The one or more memories 104 and 204 can be connected to the one or more processors 102 and 202 through various technologies, such as a wired or wireless connection.

[0269] The one or more transceivers 106 and 206 can transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operational flows of the present document, to one or more other apparatuses. The one or more transceivers 106 and 206 can receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functionalities, procedures, proposals, methods, and / or operational flows disclosed in the present document, from one or more other apparatuses. For example, the one or more transceivers 106 and 206 can be connected to the one or more processors 102 and 202, and can transmit and receive radio signals. For example, the one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can transmit user data, control information, or radio signals to one or more other apparatuses. The one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can receive user data, control information, or radio signals from one or more other apparatuses. The one or more transceivers 106 and 206 can be connected to the one or more antennas 108 and 208, and the one or more transceivers 106 and 206 can be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functionalities, procedures, proposals, methods, and / or operational flows disclosed in the present document, through the one or more antennas 108 and 208. In the present document, the one or more antennas can be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 can convert received radio signals / channels, etc., from RF band signals to baseband signals, in order to process received user data, control information, radio signals / channels, etc., using the one or more processors 102 and 202. The one or more transceivers 106 and 206 can convert user data, control information, radio signals / channels, etc., processed using the one or more processors 102 and 202, from baseband signals to RF band signals. To this end, the one or more transceivers 106 and 206 can include (analog) oscillators and / or filters.

[0270] Figure 16 A signal processing circuit for transmitting a signal based on an embodiment of the present disclosure is illustrated. Figure 16 Embodiments of the present disclosure can be combined with various embodiments of the present disclosure.

[0271] Referring to Figure 16 , the signal processing circuit 1000 can include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. The operations / functions of Figure 16 may be performed, without being limited to Figure 15The processors (102, 202) and / or transceivers (106, 206) can be used. Figure 15 Implemented by processors (102, 202) and / or transceivers (106, 206) Figure 16 Hardware components. For example, it can be achieved through... Figure 15 The processors (102, 202) implement boxes 1010 to 1060. Alternatively, they can be implemented using... Figure 15 The processors (102, 202) implement boxes 1010 to 1050, and can be used to... Figure 15 The transceivers (106, 206) are used to implement the frame 1060.

[0272] Can be via Figure 16 The signal processing circuit 1000 converts codewords into radio signals. In this document, a codeword is a sequence of encoded 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 can be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0273] Specifically, the codeword can be converted into a scrambled bit sequence by scrambler 1010. The scrambling sequence used for scrambling can be generated based on an initial value, which may include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by 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 layer mapper 1030. The modulation symbols of each transmission layer can be mapped (pre-coded) to (one or more) corresponding antenna ports by pre-encoder 1040. The output z of pre-encoder 1040 can be obtained by multiplying the output y of layer mapper 1030 by an N*M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transmission layers. Pre-encoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0274] Resource mapper 1050 maps modulation symbols for each antenna port to time-frequency resources. 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. Signal generator 1060 can generate radio signals from the mapped modulation symbols, and the generated radio signals can be transmitted to other devices via each antenna. For this purpose, 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.

[0275] Able to be with Figure 16 The signal processing procedures (1010-1060) are configured in the reverse manner for the signal processing procedures used to receive signals in a wireless device. For example, a wireless device (e.g., Figure 15 The receiver (e.g., 100, 200) can receive radio signals from the outside via the antenna port / transceiver. The received radio signals can be converted into baseband signals using a signal recovery unit. For this purpose, the signal recovery unit 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 signals can be recovered into codewords through a resource demapping process, a post-encoding process, a demodulation processor, and a descrambling process. The codewords can be recovered into the original information blocks through decoding. Therefore, the signal processing circuitry (not illustrated) used for receiving signals may include a signal recovery unit, a resource demapping unit, a post-encoder, a demodulator, a descrambler, and a decoder.

[0276] Figure 17 Another example of a wireless device based on an implementation of this disclosure is shown. The wireless device can be implemented in various forms depending on the use case / service (see reference). Figure 14 ). Figure 17 The implementation methods can be combined with various implementation methods of this disclosure.

[0277] Reference Figure 17 The wireless devices (100, 200) can correspond to Figure 15 The wireless devices (100, 200) can be configured using various elements, components, units / parts, and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit 110, a control unit 120, a storage unit 130, and an additional component 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, transceiver 114 may include one or more transceivers. Figure 15The device comprises one or more transceivers (106, 206) and / or one or more antennas (108, 208). The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the add-on components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to an external source (e.g., another communication device) via the communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., another communication device) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0278] The add-on component 140 can be configured in various ways depending on the type of wireless device. For example, the add-on 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 can be implemented in, but is not limited to, the following forms: robot ( Figure 14 100a), vehicles ( Figure 14 100b-1 and 100b-2), XR device ( Figure 14 100c), handheld device ( Figure 14 100d), home appliances ( Figure 14 100e), IoT devices ( Figure 14 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 14 400), BS ( Figure 14 (e.g., 200), network nodes, etc. Depending on the use case / service, wireless devices can be used in mobile or fixed locations.

[0279] exist Figure 17In the wireless device (100, 200), various elements, components, units / portions, and / or modules can all be connected to each other through a wired interface, or at least part of them can be wirelessly connected through the communication unit 110. For example, in each of the wireless device (100, 200), the control unit 120 and the communication unit 110 can be connected through a wired connection, and the control unit 120 and the first unit (e.g., 130, 140) can be wirelessly connected through the communication unit 110. Each element, component, unit / portion, and / or module within the wireless device (100, 200) can further include one or more elements. For example, the control unit 120 can be configured by a set of one or more processors. As an example, the control unit 120 can be configured by a set of communication control processor, application processor, electronic control unit (ECU), graphic processing unit, and memory control processor. As another example, the memory 130 can be configured by a set of random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0280] Hereinafter, examples of implementing the above-described Figure 17 will be described in detail with reference to the accompanying drawings.

[0281] Figure 18 A handheld device based on an embodiment of the disclosure is illustrated. The handheld device can include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smartglasses), or a portable computer (e.g., a notebook). The handheld device can be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Figure 17 Embodiments of the above-described

[0282] Referring to Figure 18 , the handheld device 100 can 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 can be configured as a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 of the above-described Figure 17 , respectively.

[0283] The communication unit 110 can transmit and receive signals (e.g., data signals and control signals) to and from other wireless devices or a BS. The control unit 120 can perform various operations by controlling constituent elements of the handheld device 100. The control unit 120 can include an application processor (AP). The storage unit 130 can store data / parameters / programs / codes / commands required to drive 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 include a wired / wireless charging circuit, a battery, etc. The interface unit 140b can support connection of the handheld device 100 to other external devices. The interface unit 140b can include various ports (e.g., audio I / O ports and video I / O ports) for connection with external devices. The I / O unit 140c can input or output video information / signals, audio information / signals, data, and / or information input by a user. The I / O unit 140c can include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0284] For example, in the case of data communication, the I / O unit 140c can acquire information / signals (e.g., touch, text, voice, image, or video) input by a user, and the acquired information / signals can be stored in the storage unit 130. The communication unit 110 can convert the information / signals stored in the storage unit 130 into radio signals and transmit the converted radio signals directly to other wireless devices or to a BS. The communication unit 110 can receive radio signals from other wireless devices or a BS, and then restore the received radio signals to 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 haptic) through the I / O unit 140.

[0285] Figure 19 A vehicle or autonomous vehicle based on embodiments of the disclosure is illustrated. 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 Embodiments of the disclosure can be combined with various embodiments of the disclosure.

[0286] Referring to Figure 19 The vehicle or autonomous vehicle 100 can include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 can be configured as a part of the communication unit 110. The blocks 110 / 130 / 140a to 140d correspond to the blocks 110 / 130 / 140 of Figure 17 ​

[0287] The communication unit 110 can transmit and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and road side units), and servers. The control unit 120 can perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 can include an electronic control unit (ECU). The driving unit 140a can cause the vehicle or autonomous vehicle 100 to travel on a road. The driving unit 140a can include an engine, a motor, a transmission system, a wheel, a brake, a steering device, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100, and can include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can acquire vehicle states, external environment information, user information, etc. The sensor unit 140c can include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement a technology for maintaining a lane in which the vehicle travels, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path when a destination is set, etc.

[0288] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 can control the driving unit 140a so that the vehicle or autonomous vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 can acquire recent traffic information data from an external server aperiodically / periodically, and surrounding traffic information data from a neighboring vehicle. In the middle of autonomous driving, the sensor unit 140c can acquire vehicle states and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and the driving plan based on newly acquired data / information. The communication unit 110 can deliver information about a vehicle position, an autonomous driving path, and / or a driving plan to an external server. The external server can predict traffic information data using an AI technology, etc. based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0289] The claims in the specification can be combined in various ways. For example, the technical features in the method claims of the specification can be combined to be implemented or executed in an apparatus, and the technical features in the apparatus claims can be combined to be implemented or executed in a method. In addition, the technical features in the method claim(s) and the technical features in the apparatus claim(s) can be combined to be implemented or executed in an apparatus. In addition, the technical features in the method claim(s) and the technical features in the apparatus claim(s) can be combined to be implemented or executed in a method.

Claims

1. A method performed by a first device in a wireless communication system, the method comprising: creating a first grant based on a first beam for a second device; transmitting, to the second device, control information for scheduling a physical shared channel on a physical control channel according to the first grant created based on the first beam; transmitting, to the second device, data on the physical shared channel according to the first grant created based on the first beam; and triggering resource reselection according to the first grant created based on the first beam being unavailable. 2.The method of claim 1, determining a second beam for the second device based on beam pairing with the second device having been triggered, wherein wherein the first grant is unavailable based on the second beam being unrelated to the first beam used for creating the first grant. 3.The method of claim 2, the second beam being unrelated to the first beam used for creating the first grant is a state that a spatial filter of the first beam used for creating the first grant does not cover or does not support a spatial filter of the second beam. wherein, 4.The method of claim 3, the spatial filter of the first beam is at least one of a spatial TX filter of the first beam or a spatial RX filter of the first beam; and wherein wherein the spatial filter of the second beam is at least one of a spatial TX filter of the second beam or a spatial RX filter of the second beam. 5.The method of claim 1, reselecting the first grant based on a third beam for the second device based on the resource reselection having been triggered. 6.The method of claim 1, wherein creating a second grant based on a third beam for the second device based on the resource reselection having been triggered. 7.The method of claim 1, wherein the first grant created based on the first beam is unavailable based on a resource quality for a reference signal related to the first beam being less than a threshold. 8.The method of claim 7, wherein purging the first grant according to the first grant created based on the first beam being unavailable. 9.The method of claim 1, wherein, triggering the resource reselection based on data in a logical channel being unavailable in the first grant created based on the first beam. 10.The method of claim 9, wherein creating a second grant for the data in the logical channel. 11.The method of claim 9, wherein, reselecting the first grant based on the data in the logical channel being unavailable. 12.The method of claim 1, wherein purging the first grant based on the data in the logical channel being unavailable in the first grant created based on the first beam. 13.The method of claim 1, wherein generating the first grant in a sidelink resource pool based on the first beam, wherein the first grant is a sidelink grant, wherein, wherein the physical control channel is a physical sidelink control channel (PSCCH), ​ ​ wherein the physical shared channel is a physical sidelink shared channel (PSSCH), and wherein the control information is sidelink control information (SCI).

14. A first apparatus adapted to perform wireless communication, the first apparatus comprising: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the first apparatus to perform operations comprising: creating a first grant based on a first beam for a second apparatus; transmitting, to the second apparatus, control information for scheduling a physical shared channel on a physical control channel according to the first grant created based on the first beam; transmitting, to the second apparatus, data on the physical shared channel according to the first grant created based on the first beam; and triggering resource reselection according to the first grant created based on the first beam being unavailable.

15. A processing apparatus adapted to control a first apparatus, the processing apparatus comprising: at least one processor; and at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the first apparatus to perform operations comprising: creating a first grant based on a first beam for a second apparatus; transmitting, to the second apparatus, control information for scheduling a physical shared channel on a physical control channel according to the first grant created based on the first beam; transmitting, to the second apparatus, data on the physical shared channel according to the first grant created based on the first beam; and triggering resource reselection according to the first grant created based on the first beam being unavailable.

16. A non-transitory computer-readable storage medium storing instructions that, based on being executed, cause a first apparatus to perform operations comprising: creating a first grant based on a first beam for a second apparatus; transmitting, to the second apparatus, control information for scheduling a physical shared channel on a physical control channel according to the first grant created based on the first beam; transmitting, to the second apparatus, data on the physical shared channel according to the first grant created based on the first beam; and triggering resource reselection according to the first grant created based on the first beam being unavailable.

17. A method performed by a second apparatus in a wireless communication system, the method comprising: receiving, from a first apparatus, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam for the second apparatus by the first apparatus; and receiving, from the first apparatus, data on the physical shared channel according to the first grant created based on the first beam, wherein resource reselection is triggered according to the first grant created based on the first beam being unavailable.

18. A second apparatus adapted to perform wireless communication, the second apparatus comprising: at least one transceiver; ​ ​ at least one processor; and at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the second apparatus to perform operations comprising: receiving, from a first apparatus, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first apparatus for the second apparatus; and receiving, from the first apparatus, data on the physical shared channel according to the first grant created based on the first beam, wherein a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

19. A processing apparatus adapted to control a second apparatus, the processing apparatus comprising: at least one processor; and at least one memory connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, cause the second apparatus to perform operations comprising: receiving, from a first apparatus, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first apparatus for the second apparatus; and receiving, from the first apparatus, data on the physical shared channel according to the first grant created based on the first beam, wherein a resource reselection is triggered according to the first grant created based on the first beam being unavailable.

20. A non-transitory computer-readable storage medium storing instructions that, based on being executed, cause a second apparatus to perform operations comprising: receiving, from a first apparatus, control information for scheduling a physical shared channel on a physical control channel according to a first grant created based on a first beam of the first apparatus for the second apparatus; and receiving, from the first apparatus, data on the physical shared channel according to the first grant created based on the first beam, wherein a resource reselection is triggered according to the first grant created based on the first beam being unavailable. ​

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