COT-based communication method and device in unlicensed frequency band

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: receiving a first sidelink control information (SCI) for scheduling of a second sidelink control information (SCI) and a physical sidelink shared channel (PSSCH) from a second device through a physical sidelink control channel (PSCCH); and receiving, from a second device through the PSSCH, a second SCI shared for a channel occupancy time (COT). For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

Description

Technical Field

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

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

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

[0004] [Table 1]

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

[0006] Technical Solution

[0007] Based on embodiments of the present disclosure, a method for performing wireless communication by a first device may be provided. For example, the method may include the following steps: receiving a first sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH) for scheduling of the SCI; and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0008] Based on an embodiment of the present disclosure, a first device suitable for performing wireless communication may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform operations based on being executed by the at least one processor, the operations including: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0009] Based on the embodiments of the present disclosure, a processing device suitable for controlling a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform operations based on being executed by the at least one processor, the operations including: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from the second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0010] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, a first device may perform operations, the operations including: receiving a first SCI for scheduling a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The following illustrates a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure.

[0012] Figure 2The electromagnetic spectrum according to an embodiment of the present disclosure is shown.

[0013] Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown.

[0014] Figure 4 An example of a typical NTN scenario based on regenerated payload according to an embodiment of the present disclosure is shown.

[0015] Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown.

[0016] Figure 6 The structure of a time slot of a frame according to an embodiment of the present disclosure is shown.

[0017] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0018] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation pattern according to an embodiment of the present disclosure is shown.

[0019] Figure 9 Interleaving RBs according to an embodiment of the present disclosure is shown.

[0020] Figure 10 The process of a UE sending COT shared information to another UE according to an embodiment of the present disclosure is shown.

[0021] Figure 11 A method for a first device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0022] Figure 12 A method for a second device to perform wireless communication according to an embodiment of the present disclosure is shown.

[0023] Figure 13 A communication system 1 according to an embodiment of the present disclosure is shown.

[0024] Figure 14 A wireless device according to an embodiment of the present disclosure is shown.

[0025] Figure 15 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0026] Figure 16 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0027] Figure 17 A handheld device according to an embodiment of the present disclosure is shown.

[0028] Figure 18 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0030] As used in this disclosure, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Thus, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0031] In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as “at least one of A and B”.

[0032] In addition, in the present disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” In addition, “at least one of A, B, or C” or “at least one of A, B, and / or C” may mean “at least one of A, B, and C.”

[0033] In addition, the brackets used in the present disclosure may mean "for example". Specifically, when it is indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when it is indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0034] In the following description, “when, if, or in the event of” may be replaced with “based on”.

[0035] The technical features respectively described in one drawing in the present disclosure may be implemented separately or may be implemented simultaneously.

[0036] In the present disclosure, a high-layer parameter may be a parameter configured, preconfigured, or predefined for a UE. For example, a base station or a network may send the high-layer parameter to the UE. For example, the high-layer parameter may be sent via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0037] In the present disclosure, “configuration / configured or defined / defined” may be interpreted as being configured or pre-configured for a device through predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In the present disclosure, “configuration / configured or defined / defined” may be interpreted as being pre-configured for a device.

[0038] The techniques described below may be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and the like. CDMA may be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), Long Term Evolution (LTE), 5G NR, and the like.

[0039] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, the 6G system may have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine type communication (mMTC), artificial intelligence (AI) integrated communication, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0040] Figure 1 The following illustrates a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0041] In 6G, new network features can be as follows.

[0042] -Satellite integrated network

[0043] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is innovative, and wireless evolution may be updated from "connected things" to "connected intelligence." AI can be applied at every step of the communication process (or every signal processing process described below).

[0044] -Seamless integration of wireless information and energy transfer.

[0045] -Ubiquitous Hyper-3D Connectivity: Access to networks and core network functions from drones and very low Earth orbit satellites will establish hyper-3D connectivity in 6G ubiquity.

[0046] Among the new network features of 6G, several general requirements are as follows.

[0047] -Small cell network

[0048] -Ultra-dense heterogeneous network

[0049] - High capacity backhaul

[0050] - Radar technology integrated with mobile technology: High-precision positioning (or location-based services) through communication is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0051] -Software and virtualization.

[0052] The following describes the core implementation technologies of the 6G system.

[0053] Artificial Intelligence (AI): When AI is introduced into communications, real-time data transmission can be simplified and improved. AI can use countless analyses to determine how to perform complex target tasks. This means AI can increase efficiency and reduce processing latency. Time-consuming operations such as handovers, network selection, and resource scheduling can be performed instantly with AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communications. Furthermore, AI could enable instant communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, intelligent cognitive radios, self-maintaining wireless networks, and machine learning.

[0054] -THz communication: Data rates can be increased by increasing bandwidth. This can be achieved by using sub-TH communication with wide bandwidth and applying advanced massive MIMO technology. THz waves are called submillimeter radiation, generally indicating a frequency band between 0.1THz and 10THz with corresponding wavelengths in the range of 0.03mm to 3mm. The band range of 100GHz to 300GHz (sub-THz band) is considered to be the main part of the THz band for cellular communications. When the sub-THz band is added to the millimeter wave band, the 6G cellular communication capacity increases. The defined THz band of 300GHz to 3THz is in the far infrared (IR) band. The band of 300GHz to 3THz is part of the optical band, but is located at the boundary of the optical band and immediately after the RF band. Therefore, the band of 300GHz to 3THz has similarities with RF. Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure can be combined with various embodiments of the present disclosure. The main features of THz communication include (i) a wide range of bandwidths that can be used to support very high data rates; and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth generated in highly directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated with devices and base stations operating in this band. Therefore, advanced adaptive placement techniques that can overcome range limitations can be used.

[0055] - Massive MIMO technology (Large MIMO)

[0056] -Holographic Beamforming (HBF)

[0057] -Optical wireless technology

[0058] -Free Space Optical (FSO) Backhaul Network

[0059] -Quantum communication

[0060] - No cellular communication

[0061] -Integration of wireless information and power transmission

[0062] -Integration of wireless communication and sensing

[0063] -Integrated access and backhaul network

[0064] -Big data analysis

[0065] -Reconfigurable smart surface

[0066] -Metaverse

[0067] -Blockchain

[0068] Unmanned Aerial Vehicles (UAVs): UAVs, or drones, will be a key factor in 6G wireless communications. In most cases, UAV technology can provide high-speed data wireless connectivity. A base station (BS) entity is installed within the UAV to provide cellular connectivity. UAVs offer certain features not found in fixed BS infrastructure, such as ease of deployment, robust line-of-sight links, and the freedom of mobility control. During emergencies such as natural disasters, deploying terrestrial telecommunications infrastructure is economically unfeasible and sometimes unable to provide services in turbulent environments. UAVs can easily handle such situations. UAVs will become a new paradigm in wireless communications. This technology facilitates the three fundamental requirements of wireless networks, such as eMBB, URLLC, and mMTC. UAVs can also serve a variety of purposes, such as improving network connectivity, fire detection, disaster response services, security and monitoring, pollution monitoring, parking monitoring, and accident detection. Therefore, UAV technology is recognized as one of the most important technologies for 6G communications.

[0069] -Advanced Air Mobility (AAM): AAM is a general concept of Urban Air Mobility (UAM), which is air transportation that can be used in urban areas and can refer to transportation tools including movement between urban areas and regional hubs.

[0070] -Autonomous driving (self-driving): Vehicle-to-everything (V2X) is a core element for building autonomous driving infrastructure. It can be a technology that allows vehicles to communicate and share information with various road elements, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I). To maximize the performance of autonomous driving and ensure high safety, high transmission speeds and low latency technologies are essential. In the future, autonomous driving may need to go beyond delivering warnings or guidance messages to the driver and actively intervene in vehicle operations and directly control the vehicle in dangerous situations. To this end, since the amount of information that needs to be sent and received may be enormous, autonomous driving is expected to be maximized in 6G, which has higher transmission speeds and lower latency than 5G.

[0071] - Non-terrestrial network (NTN): NTN may refer to a network or network segment that utilizes radio frequency (RF) resources on a satellite (or unmanned aerial system (UAS) platform). Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown. Figure 4 An example of a typical NTN scenario based on regeneration payload according to an embodiment of the present disclosure is shown. Figure 3 or Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Figure 3, a satellite (or UAS platform) can establish a service link with the UE. The satellite (or UAS platform) can be connected to the gateway via a feeder link. The satellite can be connected to the data network via the gateway. The beam coverage area can refer to the area where the signal sent by the satellite can be received. Figure 4 , a satellite (or UAS platform) can establish a service link with the UE. The satellite (or UAS platform) connected to the UE can be connected to another satellite (or another UAS platform) via an inter-satellite link (ISL). The other satellite (or another UAS platform) can be connected to the gateway via a feeder link. Based on the regenerative payload, the satellite can be connected to the data network through the gateway and another satellite. If there is no ISL between the satellite and the other satellite, a feeder link between the satellite and the gateway may be required. Figure 3 and Figure 4 This is only an example of an NTN scenario, and NTN can be implemented based on various types of scenarios. For example, a satellite (or UAS platform) can implement a transparent or regenerative (with on-board processing) payload. For example, a satellite (or UAS platform) can generate multiple beams over a specified service area based on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) can vary according to the on-board antenna pattern and minimum elevation angle. For example, a transparent payload may include RF filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be changed. For example, a regenerative payload may include RF filtering, frequency conversion and amplification, demodulation / decryption, switching and / or routing, and coding / modulation. For example, a regenerative payload may be substantially equivalent to equipping a satellite (or UAS platform) with all or part of the base station functionality.

[0072] Integrated Sensing and Communications (ISAC): Wireless sensing is a technology enabler for acquiring information about the characteristics of the environment and / or objects within it, using radio frequency to determine, for example, the distance (range), angle, or instantaneous linear velocity of an object. RF sensing capabilities can provide services for device-free object positioning, as objects do not need to be connected via a device in the network. The ability to obtain range, velocity, and angle information from RF signals can provide a wide range of new capabilities, such as various object detection and object identification (e.g., vehicles, people, animals, drones), as well as high-precision positioning, tracking, and activity recognition. For example, wireless sensing services can provide input to various verticals (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle maneuvering and navigation, trajectory tracking, collision avoidance, traffic management, and health and activity monitoring. In some cases, wireless sensing can also use non-3GPP sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services (i.e., sensing operations) can rely on processing the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing may have the opportunity to enhance the traditional system from a communication network to a wireless communication and sensing network. Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 5 (a) shows an example of sensing with a co-located sensing receiver and sensing transmitter (eg, monostatic sensing), and Figure 5 (b) shows an example of sensing with separate sensing receivers and sensing transmitters (eg, bistatic sensing).

[0073] The radio interface protocol layers between the UE and the network can be categorized as Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the lower three layers of the Open Systems Interconnection (OSI) model, which is well known in communication systems. The physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, and the radio resource control (RRC) layer, located at Layer 3, controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the base station layer.

[0074] The physical layer provides information transfer services to upper layers via physical channels. The physical layer is connected to the media access control (MAC) layer, its upper layer, via transport channels. Data is transferred between the MAC and physical layers via transport channels. Transport channels are categorized based on how data is transmitted over the radio interface and the characteristics of the data being transmitted.

[0075] Data is transmitted between different physical layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0076] The MAC layer provides services to the Radio Link Control (RLC) layer, a higher layer above the MAC layer, via logical channels. The MAC layer maps multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services via logical channels.

[0077] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure the different quality of service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0078] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of resource allocation (RBs). RBs are logical paths for data transfer between the UE and the network, provided by Layer 1 (i.e., the physical or PHY layer) and Layer 2 (i.e., the MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP), and Service Data Adaptation Protocol (SDAP) layers).

[0079] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0080] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0081] RB configuration refers to the process of specifying radio protocol layers and channel attributes to provide a specific service and determining corresponding detailed parameters and operation methods. RBs can be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane, and DRBs are used as a path for transmitting user data in the user plane.

[0082] When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain its connection with the core network while releasing its connection with the BS.

[0083] Data is sent from the network to the UE via a downlink transport channel. Examples of downlink transport channels include a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting other user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent via the downlink SCH or may be sent via a separate downlink multicast channel (MCH). In addition, uplink transport channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user traffic or control messages.

[0084] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0085] A radio frame can be used to perform uplink and downlink transmissions. A radio frame has a length of 10 ms and can be defined as consisting of two half frames (HFs). A half frame can include five 1 ms subframes (SFs). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined by the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0086] When using a normal CP, each time slot can include 14 symbols. When using an extended CP, each time slot can include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0087] Table 2 shown below shows the number of symbols (N) per slot based on the SCS configuration (μ) in the case of using a normal CP or an extended CP. slot symb ), the number of time slots per frame (N frame,μslot ) and the number of time slots per subframe (N subframe ,μ slot ).

[0088] [Table 2]

[0089]

[0090] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown. Figure 6 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0091] Reference Figure 6 , a time slot includes multiple symbols in the time domain. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as a plurality of consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as a plurality of consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via activated BWPs. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0092] A bandwidth part (BWP) may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0093] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an embodiment of the present invention, the number of BWPs is 3.

[0094] Reference Figure 7 , Common Resource Blocks (CRBs) may be carrier resource blocks numbered from one end of the carrier frequency band to the other. Additionally, PRBs may be resource blocks numbered within each BWP. Point A may indicate a common reference point for the resource block grid.

[0095] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP) to configure the BWP. For example, point A can be an external reference point of the PRBs of a carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0096] The side link synchronization signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as a side link (SL) specific sequence. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

[0097] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known by the UE before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0098] S-PSS, S-SSS and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre) configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0099] In the present disclosure, PSCCH may be replaced by a control channel, a physical control channel, a control channel associated with a sidelink, a physical control channel associated with a sidelink, etc. In the present disclosure, PSSCH may be replaced by a shared channel, a physical shared channel, a shared channel associated with a sidelink, a physical shared channel associated with a sidelink, etc.

[0100] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0101] Reference Figure 8 (a), in resource allocation mode 1, the base station may schedule SL resources to be used by the UE for SL transmission. For example, in step S800, the base station may send information related to the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources used to report SL HARQ feedback to the base station.

[0102] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configuration grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources may be resources configured / allocated to the first UE by the base station through downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources configured / allocated to the first UE by the base station through DCI and / or RRC messages. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first UE. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first UE, and the base station may send a DCI related to the activation or release of the CG resources to the first UE.

[0103] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or first-level SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH (e.g., second-level SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report the HARQ feedback information to the base station via the PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a preconfigured rule. For example, the DCI may be DCI for SL scheduling.

[0104] Reference Figure 8 (b) in resource allocation mode 2, the UE may determine the SL transmission resources within the SL resources configured by the base station / network or the preconfigured SL resources. For example, the configured SL resources or the preconfigured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within a selection window by performing a sensing process and a resource (re)selection process. For example, sensing may be performed in units of subchannels. For example, in step S810, the first UE, which has selected resources from the resource pool by itself, may send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., a second-level SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0105] Reference Figure 8(a) or (b), for example, the first UE may send the SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., level 2 SCIs) to the second UE via the PSCCH and / or PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., level 2 SCIs) to receive the PSSCH from the first UE. In the present disclosure, the SCI sent via the PSCCH may be referred to as the first SCI, the first SCI, the first level SCI, or the first level SCI format, and the SCI sent via the PSSCH may be referred to as the second SCI, the second SCI, the second level SCI, or the second level SCI format.

[0106] For example, the first-level SCI format may include SCI Format 1-A and / or SCI Format 1-B, and the second-level SCI format may include SCI Format 2-A, SCI Format 2-B, SCI Format 2-C, and / or SCI Format 2-D.

[0107] Hereinafter, an example of SCI format 1-A will be described.

[0108] SCI format 1-A is used for scheduling PSSCH and the second level SCI on PSSCH.

[0109] The following information is sent via SCI Format 1-A:

[0110] - Priority - 3 bits

[0111] - Frequency Resource Assignment - When the value of the higher layer parameter sl-MaxNumPerReserve is configured as 2, ceiling(log2(N SL subChannel (N SL subChannel +1) / 2)) bits; otherwise, when the value of the high-level parameter sl-MaxNumPerReserve is configured as 3, the ceiling log2(N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6) bits.

[0112] - Time resource assignment - 5 bits when the value of the higher-layer parameter sl-MaxNumPerReserve is configured as 2; otherwise, 9 bits when the value of the higher-layer parameter sl-MaxNumPerReserve is configured as 3

[0113] -Resource Reservation Period - If the higher-level parameter sl-MultiReserveResource is configured, the ceiling(log2 N rsv_period ) bits, where N rsv_period is the number of entries in the higher-level parameter sl-ResourceReservePeriodList; otherwise, 0

[0114] -DMRS pattern -ceiling(log2 N pattern ) bits, where N pattern The number of DMRS patterns configured by the higher-layer parameter sl-PSSCH-DMRS-TimePatternList

[0115] -Second level SCI format - 2 digits

[0116] - Beta_offset indicator - 2 bits, as provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0117] -Number of DMRS ports - 1 bit

[0118] - Modulation and coding scheme - 5 bits

[0119] - Additional MCS table indicator - 1 bit if one MCS table is configured by the higher-layer parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are configured by the higher-layer parameter sl-Additional-MCS-Table; otherwise, 0 bit

[0120] -PSFCH overhead indication - 1 bit if the higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise, 0 bit

[0121] - Reserved - The number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to zero.

[0122] Hereinafter, an example of SCI format 2-A will be described.

[0123] SCI format 2-A is used for decoding of PSSCH, where a HARQ operation is used when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

[0124] The following information is sent via SCI Format 2-A:

[0125] -HARQ process number - 4 bits

[0126] - New data indicator - 1 bit

[0127] - Redundancy version - 2 bits

[0128] - Source ID - 8 bits

[0129] -Destination ID - 16 digits

[0130] -HARQ feedback enable / disable indicator - 1 bit

[0131] - Broadcast Type Indicator - 2 bits, as defined in Table 3

[0132] -CSI request - 1 bit

[0133] [Table 3]

[0134] The value of the broadcast type indicator Broadcast Type 00 broadcast 01 Multicast when HARQ-ACK information includes ACK or NACK 10 Unicast 11 Multicast when HARQ-ACK information includes only NACKs

[0135] Hereinafter, an example of SCI format 2-B will be described.

[0136] SCI format 2-B is used for decoding of the PSSCH, in which a HARQ operation is used when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

[0137] The following information is sent via SCI Format 2-B:

[0138] -HARQ process number - 4 bits

[0139] - New data indicator - 1 bit

[0140] - Redundancy version - 2 bits

[0141] - Source ID - 8 bits

[0142] -Destination ID - 16 digits

[0143] -HARQ feedback enable / disable indicator - 1 bit

[0144] -Region ID - 12 digits

[0145] -Communication range requirement - 4 bits determined by the higher-layer parameter sl-ZoneConfigMCR-Index

[0146] Reference Figure 8 (a) or (b), in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resources, and the second UE may use the PSFCH resources to send HARQ feedback to the first UE.

[0147] Reference Figure 8(a), in step S840, the first UE may send SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0148] Hereinafter, a hybrid automatic repeat request (HARQ) process will be described.

[0149] For example, SL HARQ feedback may be enabled for unicast. For example, SL HARQ feedback may be enabled for multicast. For example, two HARQ feedback options may be supported for multicast.

[0150] (1) Multicast Option 1: After a receiving UE decodes a PSCCH destined for the receiving UE, if the receiving UE cannot decode a transport block associated with the PSCCH, the receiving UE may send a negative acknowledgement (NACK) to the transmitting UE via the PSFCH. Otherwise, if the receiving UE decodes a PSCCH destined for the receiving UE and if the receiving UE successfully decodes a transport block associated with the PSCCH, the receiving UE may not send a positive acknowledgement (ACK) to the transmitting UE.

[0151] (2) Multicast Option 2: After a receiving UE decodes a PSCCH targeted for the receiving UE, if the receiving UE cannot decode the transport block associated with the PSCCH, the receiving UE may send a NACK to the transmitting UE via the PSFCH. Alternatively, if the receiving UE decodes a PSCCH targeted for the receiving UE and successfully decodes the transport block associated with the PSCCH, the receiving UE may send an ACK to the transmitting UE via the PSFCH.

[0152] The following describes the UE procedure for reporting HARQ-ACK on the sidelink.

[0153] The SCI format received by scheduling PSSCH can indicate UE, when the number is N PSSCH subch In one or more of the subchannels, a PSFCH with HARQ-ACK information is transmitted in response to PSSCH reception. The UE provides HARQ-ACK information including ACK or NACK, or only NACK.

[0154] The number of time slots in the resource pool used for PSFCH transmission opportunity resources can be provided to the UE via sl-PSFCH-Period-r16. If this number is zero, the UE is disabled from transmitting PSFCH in this resource pool. The UE expects that if k mod N PSFCH PSSCH =0, then time slot t' k SL (0≤k <T' max) has PSFCH transmission opportunity resources, where t' k SL is the time slot belonging to the resource pool, T'max is the number of time slots belonging to the resource pool within 10240 milliseconds, and N PSFCH PSSCH Provided by sl-PSFCH-Period-r16. A UE may be instructed by higher layers not to transmit a PSFCH in response to a PSSCH reception. If a UE receives a PSSCH in a resource pool and the value of the HARQ Feedback Enable / Disable Indicator field in the associated SCI format 2-A or SCI format 2-B is 1, the UE provides HARQ-ACK information in the PSFCH transmission in that resource pool. The UE transmits the PSFCH in the first slot that includes the PSFCH resources and is at least a number (provided by sl-MinTimeGapPSFCH-r16) of resource pool slots after the last slot in which the PSSCH was received.

[0155] Provide the UE with M in the resource pool through sl-PSFCH-RB-Set-r16 PSFCH PRB,set A set of PRBs for PSFCH transmission in the PRBs of the resource pool. For the Nsubch subchannels provided by sl-NumSubchannel in the resource pool, and the number of PSFCH slots associated with them that is less than or equal to N PSFCH PSSCH PSSCH time slot, UE will receive PRB,set PSFCH [(i+j·N PSFCH PSSCH )·M PSFCH subch,slot ,(i+1+j·N PSFCH PSSCH )·M PSFCH subch,slot -1] PRBs are allocated to slot i and subchannel j among the PSSCH slots associated with the PSFCH slot, where M PSFCH subch,slot =M PSFCH PRB ,set / (N subch ·N PSFCH PSSCH ), 0≤i <N PSFCH PSSCH , 0≤j <N subch , and the allocation starts in ascending order of i and continues in ascending order of j. PSFCH PRB,set Yes N subch ·NPSFCH PSSCH multiples of .

[0156] The UE determines the number of PSFCH resources that can be used to multiplex HARQ-ACK information in PSFCH transmission as R PSFCH PRB,CS =N PSFCH type ·M PSFCH subch,slot ·N PSFCH CS , where N PSFCH CS is the number of cyclic shift pairs in the resource pool, and based on the instructions from the higher layer,

[0157] -N PSFCH type =1, and M PSFCH subch,slot PRBs are associated with the starting subchannel of the corresponding PSSCH.

[0158] -N PSFCH type =N PSSCH subch , and N PSSCH subch ·M PSFCH subch,slot PRBs and N from the corresponding PSSCH PSSCH subch The subchannels are associated with one or more subchannels.

[0159] PSFCH resources are firstly based on the PSFCH type ·M PSFCH subch,slot PRB indexes are indexed in ascending order, and then the PRB indexes from N PSFCH CS The cyclic shift pairs are indexed in ascending order of the cyclic shift pair indices.

[0160] The UE determines the index of the PSFCH resource used for PSFCH transmission in response to PSSCH reception as (P ID +M ID )mod R PSFCH PRB,CS , where PID is the physical layer source ID provided by the SCI format 2-A or 2-B receiving the scheduled PSSCH, and if the UE detects the SCI format 2-A with the broadcast type indicator field value of "01", the M ID is the identity of the UE receiving the PSSCH as indicated by the higher layers; otherwise, M ID is zero.

[0161] The UE selects the index from the cyclic shift pair corresponding to the PSFCH resource index and uses Table 4 from N PSFCH CS The value of m0 used to calculate the value of the cyclic shift α is determined.

[0162] [Table 4]

[0163]

[0164] The UE applies one cyclic shift from the cyclic shift pair to the sequence used for PSFCH transmission.

[0165] At the same time, (equidistant) non-contiguous RBs in frequency can be allocated to a UE. This set of non-contiguous RBs can be called interleaved RBs. This can be useful in spectrum (e.g., shared spectrum) subject to regulations such as occupied channel bandwidth (OCB) and power spectral density (PSD).

[0166] Figure 9 Interleaved RBs according to an embodiment of the present disclosure are shown. Figure 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0167] refer to Figure 9 , an interlace of RBs may be defined in the frequency domain. Interlace m∈{0,1,...,M-1} may include (common) RBs{m,M+m,2M+m,3M+m,...}, where M may represent the number of RBs of the interlace as given in Table 5.

[0168] [Table 5]

[0169] u M 0 10 1 5

[0170] A communication device (e.g., the device proposed in various embodiments of the present disclosure, UE, vehicle, drone, etc.) can send a signal / channel by using one or more interleaved RBs.

[0171] Meanwhile, in next-generation systems, the UE may perform sidelink transmission operations and / or sidelink reception operations in an unlicensed band. Meanwhile, for operation in an unlicensed band, depending on band-specific regulations or requirements, a channel sensing operation (e.g., energy detection / measurement) for the channel to be used may be performed before the UE performs a transmission. The UE may only perform a transmission in the unlicensed band if the channel or set of RBs to be used is determined to be idle as a result of channel sensing (e.g., if the measured energy is less than or equal to a specific threshold). If the channel or set of RBs to be used is determined to be busy as a result of channel sensing (e.g., if the measured energy is greater than or equal to a specific threshold), the UE may cancel all or part of the transmission in the unlicensed band. Meanwhile, in operation in an unlicensed band, the UE may skip or simplify the channel sensing operation (making the channel sensing interval relatively small) within a specific time after a transmission within a specific time duration. On the other hand, after a specific time has elapsed after a transmission, the UE may determine whether to transmit after performing a regular channel sensing operation. At the same time, for transmission in unlicensed bands, depending on regulations or requirements, the power spectral density (PSD) and / or the size and / or time interval of the signal / channel transmitted by the UE may be greater than or equal to a specific level, respectively. At the same time, in unlicensed bands, in order to simplify channel sensing, the channel occupation time (COT) duration information can be used to notify that the channel obtained based on the initial general channel sensing is occupied for a specific time, and the maximum length of the COT duration can be configured differently depending on the channel access priority class (CAPC) or the priority value of the data packet or service.

[0172] At the same time, the base station can share the COT duration obtained by channel sensing through DCI transmission, and the UE can perform a specific (indicated) channel sensing type and / or CP extension within the COT duration based on the DCI information received from the base station. At the same time, the UE can share the COT duration obtained based on channel sensing with the base station that is the destination of the UE's UL transmission, and can provide relevant information through the UL based on the configured grant uplink control information (CG-UCI). In the above situation, the base station can perform simplified channel sensing within the COT duration shared by the UE. At the same time, in the case of sidelink communication, there is a situation where the UE receives information about the resources to be used for sidelink transmission from the base station through DCI or RRC signaling, such as mode 1 resource allocation (RA) operation, and there is a situation where the UE performs sidelink transmission and reception based on inter-UE sensing operation without the assistance of the base station, such as mode 2 RA operation.

[0173] Meanwhile, in the case of channel access type 1, which can be used regardless of the channel occupancy time (COT) configuration, DL transmission can be performed based on the procedures shown in Tables 6 to 7.

[0174] [Table 6]

[0175]

[0176] [Table 7]

[0177]

[0178]

[0179] Meanwhile, for channel access type 1, which can be used regardless of the channel occupancy time (COT) configuration, UL transmission can be performed based on the procedures shown in Tables 8 to 9.

[0180] [Table 8]

[0181]

[0182]

[0183] [Table 9]

[0184]

[0185] Meanwhile, channel access type 2, which is a simplified channel access type, may be used within the channel occupation time (COT) before transmission, and DL transmission may be performed based on the procedure shown in Table 10.

[0186] [Table 10]

[0187]

[0188]

[0189] Meanwhile, channel access type 2, which is a simplified channel access type, may be used within the channel occupation time (COT) before transmission, and UL transmission may be performed based on the procedure shown in Table 11.

[0190] [Table 11]

[0191]

[0192] In embodiments of the present disclosure, Type 2A SL channel access may be performed in the same manner as Type 2A DL and / or UL channel access. For example, Type 2A SL channel access may be performed within a sensing interval T_short_sl = 25 us, where the interval may consist of a duration T_f = 16 us immediately following a sensing time slot, and T_f may include the sensing time slot at the beginning of T_f. The basic idle determination in Type 2A SL channel access may also borrow the idle determination from DL or UL channel access.

[0193] In an embodiment of the present disclosure, Type 2B SL channel access may be performed in the same manner as Type 2B DL ​​and / or UL channel access. For example, TYPE 2B side link channel access may include a sensing interval of T_f=16 microseconds, and T_f may include a sensing slot in the last 9 microsecond portion. For example, in the case of Type 2B SL channel access, the UE may perform transmission immediately after sensing that the channel is idle for a duration of T_f=16us. T_f may include a sensing slot occurring within the last 9us of T_f. The basic idle determination in Type 2B SL channel access may also borrow idle determination from DL or UL channel access.

[0194] In embodiments of the present disclosure, Type 2C SL channel access may be performed in the same manner as Type 2C DL and / or UL channel access. For example, in the case of Type 2C SL channel access, the UE may not perform channel sensing. Alternatively, the duration of the SL transmission may be up to 584 μs.

[0195] In an embodiment of the present disclosure, type 1SL channel access may be performed in the same manner as type 1DL and / or UL channel access. For example, the UE may randomly derive an integer value N based on the contention window size corresponding to the priority category. Then, if the channel sensing result within the delay duration T_d corresponding to the priority category is idle, the UE reduces the N-1 counter value by T_sl when idle. If the counter value is zero, the UE may occupy the RB set or the channel undergoing channel sensing. If it is determined that a portion of the channel sensing results within the T_sl duration is busy, the UE may maintain the counter value until the channel sensing result within the delay duration T_d is idle, and the UE may continue to perform channel sensing. In the above, the delay duration T_d may be composed of T_f=16us and m_p*T_sl consecutively after T_f=16us, where m_p may be a value determined by the priority (p), and T_sl=9us may be a time interval for performing channel sensing.

[0196] Hereinafter, a channel access priority class (CAPC) will be described.

[0197] The MAC CE and CAPC of radio bearers can be fixed or configured to operate in FR1:

[0198] - Fixed to the lowest priority for filling Buffer Status Report (BSR) and Bit Rate Recommendation MAC CE;

[0199] -For SRB0, SRB1, SRB3 and other MAC CEs, it is fixed as the highest priority;

[0200] -Configured by the base station for SRB2 and DRB.

[0201] When selecting the CAPC for a DRB, the base station considers fairness between other service types and transmissions, while also considering the 5QI of all QoS flows multiplexed to the corresponding DRB. Table 12 shows which CAPC should be used for the standardized 5QI, that is, the CAPC for a given QoS flow. For the standardized 5QI, the CAPC is defined as shown in the table below, and for the non-standardized 5QI, the CAPC with the best QoS characteristics should be used.

[0202] [Table 12]

[0203]

[0204] Table 13 shows m p , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT) and allowed CW size vary in DL depending on the channel access priority class.

[0205] [Table 13]

[0206]

[0207]

[0208] Referring to Table 13, the contention window size (CWS), maximum COT value, etc. for each CAPC may be defined. For example, Td may be equal to T f +m p *T sl (T d =T f +m p *T sl ).

[0209] Table 14 shows that in UL, mp, minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW size vary depending on the channel access priority class.

[0210] [Table 14]

[0211]

[0212] Referring to Table 14, the contention window size (CWS), maximum COT value, etc. of each CAPC can be defined. For example, T d Can be equal to T f +m p *T sl (T d =T f +m p*T sl ).

[0213] In an embodiment of the present disclosure, when the UE has occupied a channel through a type 1SL channel access, the UE may not be ready to send a sidelink transmission. In this case, the UE may configure a delay duration of length T_d and a sensing duration of length T_sl before the sidelink transmission that it is ready to send. In this article, if both are idle, the UE may perform the sidelink transmission immediately, but if at least one of the delay duration and the sensing duration is busy, the UE may perform the type 1SL channel access again. For example, if the sidelink transmission is not feasible at the time when the channel sensing ends (for example, if the end of the channel sensing is after the start of the sidelink transmission), the UE may reselect the sidelink transmission resource. For example, the reselected resource may be selected by considering the end time of the channel sensing and / or the length of the remaining sensing interval, etc. For example, the remaining sensing interval may be a value derived from the assumption that all channel sensings are idle.

[0214] In addition, when the UE performs channel sensing within a channel sensing time slot and / or delay duration, etc., if the energy value measured within the time interval is greater than, equal to, or exceeds a specific energy detection threshold, the UE can determine that the corresponding channel or RB set is busy, and if the energy value measured within the time interval is less than, equal to, or lower than the specific energy detection threshold, the UE can determine that the corresponding channel or RB set is idle.

[0215] Furthermore, if a UE indicates that it can only use the shared COT by using an L1 source ID and / or L1 destination ID, a UE that is not a target of COT sharing may use the shared COT due to an L1 ID conflict. In this case, fairness issues with other RATs may arise. Furthermore, if the size of the COT sharing information in the second SCI is large, the detection performance of the second SCI may be significantly reduced.

[0216] Figure 10 The process of a UE sending COT shared information to another UE according to an embodiment of the present disclosure is shown. Figure 10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0217] Reference Figure 10 , the UE may send COT sharing information to another UE. Hereinafter, a method for performing communication based on COT sharing and an apparatus supporting the method are proposed based on various embodiments of the present disclosure.

[0218] For example, in the case of COT sharing, the UE may select a channel access procedure of type 2 category based on the time difference between the end time of the received SL transmission and the start time of the SL transmission to be sent for the resources within the RB set for COT sharing. For example, the method of measuring the time difference may be limited to the case where the guard band is configured for the carrier and / or channel. For example, the received SL transmission may be limited to the SL channel / signal sent by the COT initiating UE. For example, the PSCCH / PSSCH including the COT sharing information may have the same source ID and / or destination ID. For example, the received SL transmission may be all or part of the SL transmission that can be received by the UE. For example, the received SL transmission may be at least the SL resource that the UE has received within the receiving resource pool. For example, the received SL transmission may share the same COT.

[0219] For example, if the guard band is not configured for at least a carrier and / or a channel, a channel access type of the type 2 category may be selected based on the time difference between the end time of the received SL transmission and the start time of the SL transmission to be sent for resources within and / or outside the RB set for COT sharing. For example, the UE may use different type 1 and / or type 2 channel access types by measuring the time interval of each RB set corresponding to the SL channel transmission. That is, in the above case, the UE may perform channel sensing based on different channel access types for each RB set for a single SL channel transmission. For example, if the guard band is not configured, the COT initiating UE may perform LBT for all RB sets, and if determined to be idle, it may perform COT initialization and COT sharing. For example, in the above case, all RB sets may be indicated when sharing the COT, and / or in the absence of an indication, all RB sets may be targets of COT sharing. For example, all RB sets may be limited to RB sets that exist in the SL carrier, in the SL BWP, or in the (transmit and / or receive) resource pool of the UE. For example, whether the COT sharing information includes RB set related information may be (pre-)configured for each resource pool, each SL carrier, and / or each SL BWP.

[0220] In addition, the SL channel used by the COT-initiating UE when initializing COT and the SL channel used to provide COT shared information can be different. For example, the UE can initialize COT when sending the first PSCCH / PSSCH, and the COT shared information can be sent via the second PSCCH / PSSCH, and / or the second PSCCH / PSSCH can be sent later in time than the first PSCCH / PSSCH. For example, the UE can initialize COT when sending the PSFCH, and the COT shared information can be sent via the PSCCH / PSSCH, and / or the PSCCH / PSSCH can be sent later in time than the PSFCH.

[0221] In addition, the COT sharing information can be determined based on the SL channel to be used for COT initialization and the transmission time, and in the above case, if the actual transmission of the SL channel to be used for COT initialization fails based on the prioritization process and / or the channel access process, the COT sharing information may no longer be valid.

[0222] For example, the time interval between the first SL channel to be used for COT initialization and the second SL channel to be used for providing COT shared information may be a (pre)configured and / or predefined threshold, or may be greater than or equal to the threshold. The basic principle is to ensure time for canceling and / or modifying the transmission of COT shared information through the second channel in the event that the UE drops the first SL channel. For example, the time interval may be a minimum PSSCH to PSFCH timing value. For example, the time interval may be the value of T_1,proc or the value of T_1, and the value of T_1,proc may be 3 slots, 5 slots, and 9 slots for 15kHz subcarrier spacing (SCS), 30kHz SCS, and 60kHz SCS, respectively, and / or the value of T_1 may be a value selected by the UE with an upper limit on the value of T_1,proc. For example, the time interval may be T_0,proc, and the value of T_0,proc may be 1 slot, 1 slot, and 2 slots for 15kHz subcarrier spacing (SCS), 30kHz SCS, and 60kHz SCS, respectively.

[0223] Furthermore, if the time interval between the first SL channel to be used for COT initialization and the second SL channel to be used for providing COT sharing information is large, the length of the remaining COT duration may be reduced, thereby potentially significantly reducing the benefit of COT sharing.

[0224] For example, if the first SL channel to be used for COT initialization and the second SL channel to be used for providing COT sharing information are different, and / or if the time interval between the first SL channel and the second SL channel is less than or equal to a certain level (e.g., a (pre)configured or predefined threshold), the UE may determine / generate COT sharing information based on the first SL channel and / or the second SL channel and / or the transmission time of the channel. For example, when configuring the remaining COT duration, it may be determined by the UE based on a first maximum COT duration determined based on the CAPC and / or the transmission time of the first SL channel, and / or it may be determined by the UE based on a second maximum COT duration determined based on the CAPC and / or the transmission time of the second SL channel, and / or it may be determined by the UE based on an earlier end time of the end times of the first maximum COT duration and the second maximum COT duration. For example, when configuring the remaining COT duration, the UE may determine the remaining COT duration based on the third maximum COT duration determined based on the CAPC of the first SL channel and / or the transmission time of the second SL channel, and / or the UE may determine the remaining COT duration based on the CAPC of the second SL channel and / or the transmission time of the first SL channel. For example, the UE may determine / configure the CAPC value to be indicated by the COT sharing information as the CAPC value of the first SL channel and / or the CAPC value of the second SL channel and / or the maximum value of the values ​​and / or the minimum value of the values ​​and / or a value determined by the UE. For example, the UE may determine / configure the information of the RB set to be indicated by the COT sharing information as all or a subset of the allocated RB set of the first SL channel and / or all or a subset of the allocated RB set of the second SL channel and / or a value determined by the UE.

[0225] When the UE drops the first SL channel (due to LBT failure), various embodiments of the present disclosure may be used / applied differently depending on whether the UE continues the channel access process for the ongoing first SL channel or (re)starts the channel access process for the second SL channel.

[0226] For example, when the UE drops the first SL channel (due to LBT failure), thereby terminating the channel access process for the ongoing first SL channel, the UE may cancel the transmission of the second SL channel including the COT sharing information and / or exclude the COT sharing information from the second SL channel (at least based on the first SL channel).

[0227] Furthermore, the length of the maximum COT duration may be determined in milliseconds. If the UE initializes the COT via a PSFCH transmission, some PSCCH / PSSCH transmissions may exceed the maximum COT duration because the COT duration ends in the middle of a slot, or the actual maximum COT duration may be reduced due to the reasons mentioned above.

[0228] For example, (at least) if the UE initializes COT by PSFCH transmission, and / or if the UE initializes COT or generates COT sharing information based on PSFCH transmission timing, the UE may determine / configure the start of the COT duration to be the end time of the PSFCH transmission or the start of the earliest time slot thereafter, or the start of SL transmission by applying CPE from the start of the time slot. For example, (at least) if the UE initializes COT by PSFCH transmission, and / or if the UE initializes COT or generates COT sharing information based on PSFCH transmission timing, when PSCCH / PSSCH is transmitted within the COT duration in a time slot overlapping with the end time of the COT duration, the UE may skip a portion of the PSCCH / PSSCH transmission. For example, a portion of the PSCCH / PSSCH transmission may not be used for a certain number of symbols or an absolute time interval from the end time of the PSCCH / PSSCH. For example, the UE may perform rate matching for the PSCCH / PSSCH with the length of the portion of the time interval reduced, and / or may perform puncturing for the end time interval. For example, whether the UE reduces the length of the partial time interval of the PSCCH / PSSCH and / or whether the UE performs rate matching or puncturing in the above case may be determined autonomously by the COT duration information (e.g., if the end time of the COT duration does not match the end time of the PSSCH) and / or may be (pre-)configured and / or may be indicated in the first SCI and / or the second SCI. For example, if the end time of the COT duration is in the middle of the timeslot, and / or the UE sends PSCCH / PSSCH in the timeslot, and / or the PSCCH / PSSCH transmission is within the COT duration and shares the COT, the UE may configure the PSFCH overhead indicator value to 3, and the UE may reduce the symbol interval length by the PSFCH overhead interval for the PSCCH / PSSCH transmission (even if there is no PSFCH opportunity or resource in the timeslot). For example, if the end time of the PSCCH / PSSCH transmission is later than the end time of the maximum COT duration and / or the end time of the COT duration, the UE may not use COT when sending PSCCH / PSSCH, and / or the UE may attempt transmission based on the type 1 channel access procedure when sending PSCCH / PSSCH.

[0229] For example, when the UE initiates COT, the start of the COT duration length may be the start of the SL channel that does not include the CPE. For example, when the UE initiates COT, the start of the COT duration length may be the start of the SL channel that includes the CPE.

[0230] For example, when a UE performs transmission, the RSRP threshold and / or SL (receive) priority threshold (referenced when determining whether to perform preemption) may be different or may be individually (pre)configured depending on the channel access type and / or whether the transmission resource is located within or outside the COT.

[0231] For example, when providing COT sharing information, the COT initiating UE may include information for UEs using COT, and the information for UEs that can use COT may (additionally) provide L1 and / or L2 source IDs, L1 and / or L2 destination IDs and / or broadcast type information.

[0232] For example, the COT initiating UE may send COT shared information via the second SCI. In this case, the following information may be sent via the second SCI.

[0233] -HARQ process number - 4 bits

[0234] - New data indicator - 1 bit

[0235] - Redundancy version - 2 bits

[0236] - Source ID - 8 bits

[0237] -Destination ID - 16 digits

[0238] -HARQ feedback enable / disable indicator - 1 bit

[0239] - Broadcast Type Indicator - 2 bits, as defined in Table 3

[0240] -CSI request - 1 bit

[0241] -CAPC-2 digits

[0242] - COT Shared Broadcast Type - 2 bits, as defined in Table 15

[0243] -COT Shared Additional ID - 24 bits

[0244] - Remaining COT duration

[0245] [Table 15]

[0246]

[0247] For example, the COT shared additional ID may include an L1 destination ID (eg, a 16-bit L1 destination ID) and / or an L1 source ID (eg, an 8-bit L1 source ID).

[0248] For example, when providing COT shared information, the COT initiating UE may include information for UEs using COT, and the UE information may be in the form of a third ID, and the third ID may be associated with the L1 and / or L2 source ID, L1 and / or L2 destination ID, and / or broadcast type information. This association may be (pre-)configured, exchanged / configured between UEs via PC5-RRC signaling, or determined by a higher layer.

[0249] In addition, when a third UE transmits a PSFCH after a COT-responding UE transmits a multicast PSCCH / PSSCH, the transmission target of the PSFCH may not include the COT-initiating UE. For example, if a UE transmits a PSFCH in response to a PSCCH / PSSCH with a (multicast) destination ID related to COT sharing, the UE may use COT (transmission performed based on a channel access procedure of type 2 category) when transmitting the PSFCH (even if the PSFCH transmission does not include transmission to the COT-initiating UE). For example, whether COT is used for PSFCH transmission may operate differently depending on the priority and / or CAPC value. For example, in the case of high priority, a relaxation of the COT usage conditions for PSFCH transmission may be applied.

[0250] For example, if a UE transmits a PSFCH in response to a PSCCH / PSSCH of a (multicast) destination ID associated with COT sharing, and if the PSFCH transmission does not include a transmission to a COT-initiating UE, the PSFCH transmission may be performed based on a Type 1 channel access procedure. For example, even in the case of multicast, the COT sharing information may still include a source ID. For example, the UE may determine, based on the multicast source ID, whether the COT-initiating UE is the target of the PSFCH transmission in response to the multicast PSSCH, and / or if the COT-initiating UE is the target, the UE may use COT when transmitting the PSFCH, and / or if the COT-initiating UE is not the target, the UE may not use COT when transmitting the PSFCH.

[0251] For example, if the UE sends a PSFCH in response to a PSCCH / PSSCH of a (multicast) destination ID associated with COT sharing, and if the PSFCH transmission does not include a transmission to the COT-initiating UE, the UE may (additionally) send a PSFCH on a PSFCH resource corresponding to the multicast source ID of the COT-initiating UE, and / or the control information for the PSFCH sent via the PSFCH resources may be the same as that in response to the PSCCH / PSSCH of the (multicast) destination ID received by the UE, and / or may be a value determined based on the UE implementation or a value randomly determined by the UE.

[0252] In addition, even if the COT initiating UE is not included in the transmission target for PSFCH transmission, if there is an SL channel / signal sent to the COT initiating UE within the multi-continuous time slot transmission (MCSt) or SL TX burst to which the PSCCH / PSSCH and / or PSFCH belong in the same time slot, the UE can use COT when sending PSFCH. For example, when sending PSCCH / PSSCH that meets COT conditions (such as target UE and / or CAPC conditions and / or energy detection threshold (EDT) conditions) within the COT, the UE can give priority to candidate resources of the time slot including PSFCH resources. When sending PSCCH / PSSCH that meets COT conditions (such as target UE and / or CAPC conditions and / or EDT conditions) within the COT, the UE can give priority to resources of the time slot including the PSFCH to be transmitted by the UE and / or the UE transmitting the PSFCH for MCSt.

[0253] For example, when transmitting multiple PSFCHs, the UE may limit the transmit power of all or part of the PSFCHs in order to use the COT obtained or received by the UE. For example, in the case of transmit power limitation, after the UE determines the number of PSFCHs to be transmitted simultaneously, the UE may reduce the power for the PSFCHs transmitted simultaneously (depending on the priority and / or CAPC and / or target UE and / or within or outside the RB set associated with the COT) in common or differently. For example, the UE may change the total power sum of the PSFCH transmissions within the RB set associated with the COT to be less than or equal to the transmit power limit used for the COT. For example, the UE may also reduce the power value of the PSFCH transmissions outside the RB set associated with the COT to match the power value of each PSFCH. For example, the transmit power limitation may be applied to the power sum of the PSFCH transmissions within and / or outside the RB set associated with the COT. For example, in the case of transmit power limitation, the UE may also reduce the number of PSFCHs to be transmitted simultaneously. For example, the UE may determine the number of PSFCHs to be simultaneously transmitted by the UE in all RB sets or in RB sets related to the COT (based on priority and / or control information type and / or target UE, etc.) based on the transmit power limit.

[0254] For example, when transmitting PSCCH / PSSCH, the UE may limit the transmit power of the PSCCH / PSSCH so as to use the COT obtained or received by the UE. For example, the PSCCH / PSSCH may meet the conditions for the COT (for example, the target UE includes at least the COT initiating UE and / or the CAPC value is less than or equal to the CAPC value used when initializing the COT). For example, the UE may reduce the power value inside the COT (in time and / or frequency) in the PSCCH / PSSCH resource. For example, the UE may reduce the power value inside and outside the COT (in time and / or frequency) in the PSCCH / PSSCH resource. For example, the UE may change the sum of the PSDs of the PSCCH / PSSCH in the RB set associated with the COT to be less than or equal to the transmit power limit used for the COT. For example, the UE may change the power value of the PSCCH / PSSCH to be less than or equal to the transmit power limit used for the COT.

[0255] For example, when transmitting a single S-SSB or multiple S-SSBs, the UE may limit the transmit power of all or part of the S-SSBs in order to use the COT obtained or received by the UE. For example, in the case of transmit power limitation, the UE may reduce the power for the S-SSBs transmitted simultaneously (depending on the priority and / or CAPC and / or target UE and / or within or outside the RB set associated with the COT) collectively or differently. For example, the UE may change the sum of the total power of the S-SSB transmissions within the RB set associated with the COT to be less than or equal to the transmit power limit used for the COT. For example, the UE may also reduce the power value for the S-SSB transmissions outside the RB set associated with the COT to match the power value for each S-SSB. For example, the transmit power limitation may be applied to the sum of the power for the S-SSB transmissions within and / or outside the RB set associated with the COT.

[0256] For example, the minimum power value for the SL channel / signal may be determined by the UE, either for each SL BWP and / or for each RB set and / or for each resource pool and / or for each SL channel type and / or for each SL priority and / or for each CAPC value and / or for each congestion control level and / or for each QoS parameter and / or for each basic resource (in time and / or frequency) and / or for each additional resource (in time and / or frequency) and / or for each internal or external (pre-)configuration of COT (in time and / or frequency), and / or when a maximum power limit is applied for the use of COT, if the minimum power value cannot be guaranteed, the UE may skip transmission for the corresponding SL channel / signal and / or reselect resources and / or attempt transmission based on the type 1 channel access procedure.

[0257] For example, the COT information for the receiver of the PSCCH / PSSCH transmitted by the COT initiating UE and the COT information for the receiver matching the additional ID can be configured differently and / or independently. For example, the COT durations (in frequency and / or time) according to different COT information may not overlap with each other.

[0258] For example, the COT duration for a receiver of a PSCCH / PSSCH transmitted by a COT initiating UE and the COT duration for a receiver matching the additional ID may be the same.

[0259] For example, the COT shared information may be transmitted via the first SCI and / or the second SCI, and / or a portion of the COT shared information may be transmitted via the first SCI, and the remaining COT shared information may be transmitted via the second SCI. For example, a portion of the COT shared information may be transmitted via the first SCI and / or the second SCI and / or the MAC CE by overlapping the same information.

[0260] For example, at least the CAPC value (for transmission to the shared COT and / or UE) and / or information related to time and / or frequency resources for the shared COT and / or information related to the target UE (ID) (and / or broadcast type information for target transmission) and / or CPE starting position information (for transmission to the UE and / or reserved resources) may be included in the first SCI (SCI format 1-A).

[0261] For example, at least information related to time and / or frequency resources for the shared COT and / or information related to the target UE (ID) (and / or broadcast type information for target transmission) may be included in the second SCI.

[0262] For example, the type and / or format of the second SCI that can include COT shared information can be limited. For example, the second SCI format that can include COT shared information can be limited to an SCI format (e.g., SCI format 2-A) that can schedule / allocate PSSCH for unicast and / or broadcast and / or multicast. The basic principle is that in the case of SCI format 2-B or SCI format 2-C, the current payload may already be excessive and there may not be enough remaining space to additionally include COT shared information. For example, the second SCI format that can include COT shared information may include SCI format 2-B, and the basic principle is to support the transmission of COT shared information even when sending TBs for distance-based operations.

[0263] For example, the UE may not need or desire to provide both COT shared information and IUC information. For example, this may be limited to the case where IUC information is sent via the second SCI, and / or if it is sent only via MAC CE, the UE may be exceptionally allowed to provide both COT shared information and IUC information simultaneously. For example, this may be limited to the case where the payload size of the second SCI configured based on IUC information is greater than or equal to a certain level and / or does not include all or part of the IUC information and COT shared information.

[0264] For example, the UE may transmit part of the COT shared information using SCI format 1-A (first SCI), and may not provide part of the COT shared information accordingly. For example, in the case where all or part of the COT shared information is not provided from the COT initiating UE, the COT responding UE may perform COT sharing by assuming a specific value.

[0265] For example, if there is no separate frequency domain resource indicator for the shared COT, the UE receiving the COT sharing information may assume / configure the allocated subchannels and / or RB sets for the PSCCH / PSSCH including the COT sharing information as the frequency domain for the shared COT.

[0266] For example, if there is no separate time domain resource indicator for the shared COT, the UE receiving the COT sharing information can assume / configure the (maximum) COT duration length as the time domain for the shared COT based on the CAPC value for the shared COT from the time slot in which the PSCCH / PSSCH including the COT sharing information is received. For example, the CAPC value for the shared COT can be indicated as part of the COT sharing information and / or can be a minimum CAPC value and / or a maximum CAPC value and / or a (pre-) configured (default) CAPC value (at least if not indicated).

[0267] For example, whether COT sharing is enabled can be indicated by a separate field in the SCI. For example, if a separate field in the first SCI (e.g., the COT Sharing Flag field) indicates COT sharing, the CAPC field, the COT Sharing Broadcast Type field, the COT Sharing Additional ID field, and / or the Remaining COT Duration field can be included in the second SCI. For example, if COT sharing is disabled using this field, the receiving UE can ignore all or part of the COT sharing information. For example, in the above case, the receiving UE can obtain at least the CAPC information and / or L1 source / destination ID-related information (regardless of whether COT sharing is enabled or disabled).

[0268] For example, the UE may indicate whether COT sharing is enabled by using a specific value in a portion of the information for COT sharing.

[0269] For example, COT sharing may be disabled if the UE indicates a reserved state in the frequency resource information for shared COT and / or sets all bits to zero in a bitmap scheme and / or the frequency resource information indicates frequency resources outside the frequency allocation domain of the PSCCH / PSSCH including the COT sharing information.

[0270] For example, if the UE sets the COT duration information to 0 in the time resource information for the shared COT, COT sharing may be disabled.

[0271] In addition, the UE can limit the COT target UE to the data receiving UE of the PSCCH / PSSCH including the COT shared information. For example, the UE can indicate whether to include and / or indicate the target UE ID information through a separate field of the first SCI and / or the second SCI, and / or if the indication of the COT target UE ID information is disabled, the receiving UE can ignore the COT target UE ID information. For example, the UE can configure the COT target UE ID information and / or the COT target broadcast type information to be the same as the data target receiving UE information (destination ID) of the PSCCH / PSSCH including the COT information and / or the broadcast type information of the PSCCH / PSSCH. For example, if the COT target UE ID and / or the COT target broadcast type indicator indicates a specific value (e.g., an all-0 or all-1 ID and / or a reserved state), the COT shared target UE can be limited to the receiving UE of the PSCCH / PSSCH.

[0272] For example, if the UE considers shared COT information in resource (re)selection, and / or if the UE fails to detect the second SCI, and / or if the requirements for using the shared COT are not met (e.g., conditions based on the CAPC value and / or transmit power and / or whether the receiving UE is a COT initiating UE, etc.), and / or if the UE determines not to use the shared COT, the UE may exclude all or part of the time domain for the shared COT from the set of available resources and / or deprioritize transmission resource selection.

[0273] For example, if the UE considers shared COT information in resource (re)selection, and / or if the UE successfully detects a second SCI, and / or if requirements for using shared COT are met (e.g., conditions based on CAPC value and / or transmit power and / or whether the receiving UE is a COT initiating UE, etc.), and / or if the UE determines to use shared COT, the UE may include all or part of the time domain for the shared COT in the available resource set (based on the UE's additional sensing results) and / or prioritize transmission resource selection.

[0274] For example, a UE may provide all or part of the COT shared information to another UE via SCI format 2-C, and / or at a given time, SCI format 2-C may indicate IUC information, IUC request information, or COT shared information, and which of the above information is included may be indicated by a separate field in SCI format 2-C. For example, the size of SCI format 2-C may be determined based on a maximum value for each of the cases of including IUC information, including IUC request information, and / or including COT shared information, and may be adjusted to the same size for the remaining cases using padding bits. For example, if SCI format 2-C includes at least COT sharing information, SCI format 2-C may include a broadcast type indicator, and / or SCI format 2-C may schedule / indicate multicast PSSCH and / or broadcast PSSCH and / or unicast PSSCH with SL HARQ-ACK feedback disabled, and / or multicast PSSCH with SL HARQ-ACK feedback option 1 with distance-based operation, and / or multicast PSSCH with SL HARQ-ACK feedback option 1 with non-distance-based operation, and / or multicast PSSCH with SL HARQ-ACK feedback option 2. For example, if SCI format 2-C includes at least COT sharing information, SCI format 2-C may include an area ID and / or a maximum communication range indicator. For example, if the transmission of IUC information and / or IUC request information is not (pre-)configured for a resource pool, the combination of information that can be sent in SCI format 2-C according to the configuration and / or the interpretation method and field size of the transmission combination indicator to be sent may be appropriately configured / determined. For example, if the transmission of IUC information and IUC request information is not (pre-)configured for the resource pool, SCI format 2-C may be used to indicate COT sharing information.

[0275] Furthermore, it may be necessary to determine whether the PHY layer or the MAC layer makes the decision on whether to send the COT sharing information.

[0276] For example, whether to send COT shared information may be determined by the PHY layer of the UE. For example, in the above case, if the timing at which the UE sends data based on distance operation overlaps with the timing at which the UE sends COT shared information, the UE may give priority to sending data based on distance operation. The reason is that if only COT shared information is sent, if there is no data corresponding thereto, the UE may not perform resource (re)selection for COT shared information transmission. For example, in the above case, if the timing at which the UE sends data based on distance operation overlaps with the timing at which the UE sends COT shared information, the UE may give priority to COT shared information transmission. The reason is to increase the transmission opportunity of SL transmission in the unlicensed band. For example, in the above case, if the timing at which the UE sends data based on distance operation overlaps with the timing at which the UE sends COT shared information, the UE may determine the data or information to be prioritized based on each of the relevant CAPC values ​​and / or each of the relevant SL priority values.

[0277] An embodiment of the present disclosure may be a case where the second SCI format for scheduling data based on distance operation is different from the SCI format for providing COT shared information.

[0278] For example, whether to send COT sharing information can be determined by the MAC layer of the UE. For example, in the above case, the PHY layer can report the COT-related information to be shared (for example, the CAPC value and / or EDT value and / or COT-related time and / or frequency resources used when obtaining the COT) to the MAC layer. For example, the MAC layer can determine whether to send COT sharing information and / or COT-related information based on the data to be sent, and provide the relevant information to the PHY layer. For example, when the MAC layer sends IUC information and / or IUC request information and / or intends to send IUC-related information in SCI format 2-C, the MAC layer can determine not to send COT sharing information. For example, when the MAC layer sends IUC information and / or IUC request information and / or intends to send IUC-related information in SCI format 2-C, the MAC layer can determine to send COT sharing information and cancel the transmission of IUC-related information. For example, when the MAC layer transmits IUC information and / or IUC request information and / or intends to transmit IUC-related information in SCI format 2-C, the MAC layer may determine the type of information to be prioritized or transmitted based on each of the priority values ​​of the information (e.g., transmitting an item with a smaller priority value) and / or each of the CAPC values ​​(e.g., transmitting an item with a smaller CAPC value or a larger CAPC value). For example, the PHY layer may determine whether to transmit COT shared information based on information provided by the MAC layer.

[0279] For example, the second SCI format including COT shared information can be in the form of a separate format (SCI format 2-D), and / or the SCI format can schedule / indicate multicast PSSCH with SL HARQ-ACK feedback disabled and / or broadcast PSSCH and / or unicast PSSCH and / or multicast PSSCH with SL HARQ-ACK feedback option 1 with distance-based operation and / or multicast PSSCH with SL HARQ-ACK feedback option 1 with non-distance-based operation and / or multicast PSSCH with SL HARQ-ACK feedback option 2.

[0280] In the embodiments of the present disclosure, transmission outside the COT may be interpreted as transmission used when initializing the COT and / or transmission based on a Type 1 channel access procedure.

[0281] The embodiments of the present disclosure may be different and / or (pre)configured by resource pool and / or by transmission outside the resource pool and / or within the resource pool and / or by QoS parameters and / or by CAPC and / or by SL priority and / or by transmission within the COT or outside the COT (when initializing the COT) and / or by transmission order within the MCSt and / or by SL channel type and / or by RB set and / or by SL BWP and / or by SL carrier and / or by congestion control level and / or by transmitting operation or receiving operation and / or by transmitting power level and / or by transmission start time and / or by channel access procedure type for transmission and / or by LBT failure rate and / or by COT initiator UE or COT responder UE or other UE and / or by broadcast type and / or by SL HARQ-ACK feedback enabled or disabled and / or by HARQ-ACK feedback option and / or by number of transmission attempts for the same information or TB. In an embodiment of the present disclosure, (pre-)configuration can be performed by resource pool and / or by transmission outside the resource pool and / or within the resource pool and / or by QoS parameters and / or by CAPC and / or by SL priority and / or by transmission within or outside the COT (when initializing the COT) and / or by transmission order within the MCSt and / or by SL channel type and / or by RB set and / or by SL BWP and / or by SL carrier and / or by congestion control level and / or by transmitting operation or receiving operation and / or by transmitting power level and / or by transmission start time and / or by channel access procedure type for transmission and / or by LBT failure rate and / or by COT initiator UE or COT responder UE or other UE and / or by broadcast type and / or by SL HARQ-ACK feedback enabling or disabling and / or by HARQ-ACK feedback option and / or by the number of transmission attempts for the same information or TB.

[0282] Figure 11 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown. Figure 11 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0283] Reference Figure 11 In step S1110, the first device may receive a first SCI for scheduling a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from the second device via a physical sidelink control channel (PSCCH). In step S1120, the first device may receive a second SCI for sharing a channel occupancy time (COT) from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0284] For example, the COT sharing broadcast type information may indicate a broadcast type of sidelink transmission using COT sharing.

[0285] For example, based on the COT sharing broadcast type information indicating broadcast, broadcast transmission may be performed by the first device based on the COT sharing.

[0286] For example, based on the COT sharing broadcast type information indicating multicast, the first device may perform multicast transmission based on COT sharing.

[0287] For example, based on the COT sharing broadcast type information indicating unicast, the first device may perform unicast transmission based on COT sharing.

[0288] For example, the COT shared additional ID may include using at least one of a second source ID or a second destination ID shared by the COT.

[0289] For example, the first SCI may include a field indicating that information for COT sharing is included in the second SCI. For example, based on the field indicating that information for COT sharing is included in the second SCI, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT sharing broadcast type information, and a COT sharing additional ID.

[0290] For example, the second SCI may further include information related to the COT duration.

[0291] Additionally, for example, the first device may perform sidelink transmission based on COT sharing. For example, based on receiving the PSCCH and PSSCH in the frequency domain, the first device may perform sidelink transmission in the frequency domain based on COT sharing. For example, based on the second SCI not including frequency resource information for COT sharing, the first device may perform sidelink transmission in the frequency domain based on COT sharing.

[0292] In addition, for example, the first device may receive a PSSCH associated with the second destination ID or the first destination ID included in the COT shared additional ID from the third device. In addition, for example, the first device may perform physical sidelink feedback channel (PSFCH) transmission in response to the PSSCH from the third device. For example, the PSFCH transmission may be performed based on COT sharing. For example, even if the target of the PSFCH transmission does not include the second device, the PSFCH transmission may be performed based on COT sharing.

[0293] For example, information for inter-UE coordination (IUC) and information for COT sharing may not be allowed to be included in the second SCI.

[0294] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 102 of the first device 100 can control the transceiver 106 to receive a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and a second sidelink control information (SCI) from the second device through a physical sidelink control channel (PSCCH). In addition, the processor 102 of the first device 100 can control the transceiver 106 to receive a second SCI for sharing of channel occupancy time (COT) from the second device through the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0295] Based on an embodiment of the present disclosure, a first device suitable for performing wireless communication may be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform operations based on being executed by the at least one processor, the operations including: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0296] Based on the embodiments of the present disclosure, a processing device suitable for controlling a first device may be provided. For example, the processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform operations based on being executed by the at least one processor, the operations including: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from the second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0297] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, a first device may perform operations, the operations including: receiving a first SCI for scheduling a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); and receiving a second SCI for channel occupancy time (COT) sharing from the second device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0298] Figure 12 A method for a second device to perform wireless communication according to an embodiment of the present disclosure is shown. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0299] Reference Figure 12 In step S1210, the second device may transmit a first SCI for scheduling a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) to the first device via a physical sidelink control channel (PSCCH). In step S1220, the second device may transmit a second SCI for sharing a channel occupancy time (COT) to the first device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0300] For example, the COT sharing broadcast type information may indicate a broadcast type of sidelink transmission using COT sharing.

[0301] For example, based on the COT sharing broadcast type information indicating broadcast, broadcast transmission may be performed by the first device based on the COT sharing.

[0302] For example, based on the COT sharing broadcast type information indicating multicast, the first device may perform multicast transmission based on COT sharing.

[0303] For example, based on the COT sharing broadcast type information indicating unicast, the first device may perform unicast transmission based on COT sharing.

[0304] For example, the COT shared additional ID may include using at least one of a second source ID or a second destination ID shared by the COT.

[0305] For example, the first SCI may include a field indicating that information for COT sharing is included in the second SCI. For example, based on the field indicating that information for COT sharing is included in the second SCI, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT sharing broadcast type information, and a COT sharing additional ID.

[0306] For example, the second SCI may further include information related to the COT duration.

[0307] Additionally, for example, the first device may perform sidelink transmission based on COT sharing. For example, based on receiving the PSCCH and PSSCH in the frequency domain, the first device may perform sidelink transmission in the frequency domain based on COT sharing. For example, based on the second SCI not including frequency resource information for COT sharing, the first device may perform sidelink transmission in the frequency domain based on COT sharing.

[0308] For example, information for inter-UE coordination (IUC) and information for COT sharing may not be allowed to be included in the second SCI.

[0309] The proposed method can be applied to devices based on various embodiments of the present disclosure. First, the processor 202 of the second device 200 can control the transceiver 206 to send a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and a second sidelink control information (SCI) to the first device through a physical sidelink control channel (PSCCH). In addition, the processor 202 of the second device 200 can control the transceiver 206 to send a second SCI for channel occupancy time (COT) sharing to the first device through the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0310] Based on the embodiments of the present disclosure, a second device suitable for performing wireless communication may be provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the second device to perform operations based on being executed by the at least one processor, the operations including: sending a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) to the first device via a physical sidelink control channel (PSCCH); and sending a second SCI for channel occupancy time (COT) sharing to the first device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0311] Based on the embodiments of the present disclosure, a processing device suitable for controlling a second device can be provided. For example, the processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions can cause the second device to perform operations based on being executed by the at least one processor, and the operations include: sending a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and a second sidelink control information (SCI) to the first device via a physical sidelink control channel (PSCCH); and sending a second SCI for channel occupancy time (COT) sharing to the first device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0312] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, a second device may perform operations, the operations including: sending a first SCI for scheduling a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) to a first device via a physical sidelink control channel (PSCCH); and sending a second SCI for channel occupancy time (COT) sharing to the first device via the PSSCH. For example, the second SCI may include a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

[0313] Based on various embodiments of the present disclosure, COT sharing information may include broadcast type information and additional ID information that can be transmitted using a COT SL. For example, COT sharing information may be transmitted using SCI format 2-A, and the first SCI may indicate at least the presence of additional ID information and / or whether COT sharing is enabled. For example, the RB set for COT sharing may be the same as the RB set occupied by the PSCCH / PSSCH that includes the COT sharing information. Thus, when using COT sharing, fairness issues caused by L1 ID conflicts can be mitigated, and SCI overhead can be optimized based on, for example, the presence or absence of COT sharing information.

[0314] Various embodiments of the present disclosure may be combined with each other.

[0315] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0316] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0317] Hereinafter, a more detailed description will be given with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0318] Figure 13 A communication system 1 according to an embodiment of the present disclosure is shown. Figure 13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0319] Reference Figure 13, a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, a vehicle (100b-1, 100b-2), an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone) and / or an aircraft (AV) (e.g., an advanced air mobility (AAM)). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smartphones, smart pads, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0320] Here, in addition to LTE, NR, and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may also include narrowband IoT for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, without being limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, without being limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low-power wide area network (LPWAN), and ZigBee considering low-power communication, and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to low / low-power digital communication based on various standards including IEEE 802.15.4, and may be referred to by various names.

[0321] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0322] Wireless communication / connection 150a, 150b, or 150c may be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection may be established via various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may transmit / receive radio signals to / from each other via the wireless communication / connections 150a and 150b. For example, the wireless communication / connections 150a and 150b may transmit / receive signals via various physical channels. To this end, various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of the resource allocation process for transmitting / receiving radio signals may be performed based on various proposals of the present disclosure.

[0323] Figure 14 A wireless device according to an embodiment of the present disclosure is shown. Figure 14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0324] Reference Figure 14 , the first wireless device 100 and the second wireless device 200 can transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 13 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x} in.

[0325] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processor(s) 102 may control the memory(s) 104 and / or the transceiver(s) 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 102 may process information in the memory(s) 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver(s) 106. The processor(s) 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including commands for executing part or all of the processing controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and / or receive radio signals via the antenna(s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver(s) 106 may be interchangeably used with the radio frequency (RF) unit(s). In the present disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0326] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also include one or more transceivers 206 and / or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and / or the transceiver(s) 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 202 may process information in the memory(s) 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver(s) 206. The processor(s) 202 may receive a radio signal including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. Memory(s) 204 may be connected to processor(s) 202 and may store various information related to the operation of processor(s) 202. For example, memory(s) 204 may store software code including commands for executing part or all of the processing controlled by processor(s) 202 or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, processor(s) 202 and memory(s) 204 may be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). Transceiver(s) 206 may be connected to processor(s) 202 and transmit and / or receive radio signals via antenna(s) 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver(s) 206 may be used interchangeably with RF unit(s). In this disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0327] The hardware elements of the wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document.

[0328] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0329] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 can be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0330] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels described in the methods and / or operational flows of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels described in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process the received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0331] Figure 15 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0332] Reference Figure 15 , the signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050 and a signal generator 1060. Figure 15 operations / functions, not limited to Figure 14The processor (102, 202) and / or transceiver (106, 206) of Figure 14 The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 15 For example, you can Figure 14 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 14 The processor (102, 202) implements blocks 1010 to 1050 and can be Figure 14 The transceiver (106, 206) is used to implement block 1060.

[0333] Can be passed Figure 15 Signal processing circuit 1000 converts a codeword into a radio signal. Herein, a codeword is a sequence of coded bits for an information block. An information block may include a transport block (e.g., a UL-SCH transport block, a DL-SCH transport block). Radio signals may be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0334] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0335] The resource mapper 1050 can map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0336] Can Figure 15 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Figure 14 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0337] Figure 16 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Figure 13 ). Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0338] Reference Figure 16 , the wireless device (100, 200) may correspond to Figure 14 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit 110, a control unit 120, a storage unit 130 and additional components 140. The communication unit may include a communication circuit 112 and (one or more) transceivers 114. For example, the communication circuit 112 may include Figure 14 One or more processors (102, 202) and / or one or more memories (104, 204). For example, the transceiver(s) 114 may include Figure 14The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 can transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0339] The additional component 140 may be configured in various ways depending on the type of wireless device. For example, the additional component 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Figure 13 100a), vehicles ( Figure 13 100b-1 and 100b-2), XR devices ( Figure 13 100c), handheld device ( Figure 13 100d), household appliances ( Figure 13 100e), IoT devices ( Figure 13 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 13 400), BS( Figure 13 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0340] exist Figure 16In the embodiment of the present invention, the various elements, components, units / parts and / or modules in the wireless device (100, 200) can all be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit 110. For example, in each of the wireless devices (100, 200), the control unit 120 and the communication unit 110 can be connected through a wired interface, and the control unit 120 and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit 110. Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit 120 can be constructed by a collection of one or more processors. As an example, the control unit 120 can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 can be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0341] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 16 .

[0342] Figure 17 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0343] Reference Figure 17 , the handheld device 100 may include an antenna unit (108), a communication unit 110, a control unit 120, a storage unit 130, a power supply unit 140a, an interface unit 140b and an I / O unit 140c. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to Figure 16 Frame 110 to 130 / 140.

[0344] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a base station. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The storage unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and may include wired / wireless charging circuits, a battery, etc. The interface unit 140b can support connection between the handheld device 100 and other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., an audio I / O port and a video I / O port). The I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0345] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the storage unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the storage unit 130 and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0346] Figure 18 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 18 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0347] Reference Figure 18 , the vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 16 Box 110 / 130 / 140.

[0348] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a can cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuits, a battery, etc. The sensor unit 140c can acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU), a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement technology for maintaining the lane in which the vehicle is traveling, technology for automatically adjusting the speed (for example, adaptive cruise control), technology for autonomously driving along a determined path, technology for driving by automatically setting a path with a destination set, etc.

[0349] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can aperiodically / periodically acquire the latest traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle's location, autonomous driving path, and / or driving plan to the external server. The external server can use AI technology, etc. based on the information collected from the vehicle or autonomous vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0350] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the steps of: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); as well as receiving the second SCI for channel occupancy time (COT) sharing from the second device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

2. The method according to claim 1, wherein The COT sharing broadcast type information indicates a broadcast type for side link transmission using the COT sharing.

3. The method according to claim 1, wherein Based on the COT sharing broadcast type information indicating broadcast, the first device performs broadcast transmission based on the COT sharing.

4. The method according to claim 1, wherein Based on the COT sharing broadcast type information indicating multicast, the first device performs multicast transmission based on the COT sharing.

5. The method according to claim 1, wherein Based on the COT sharing broadcast type information indicating unicast, the first device performs unicast transmission based on the COT sharing.

6. The method according to claim 1, wherein The COT sharing additional ID includes at least one of a second source ID or a second destination ID for using the COT sharing.

7. The method according to claim 1, wherein The first SCI includes a field indicating that information shared for the COT is included in the second SCI.

8. The method according to claim 7, wherein: Based on the field indicating that the information for the COT share is included in the second SCI, the second SCI includes the first source ID, the first destination ID, the broadcast type information, the COT shared broadcast type information, and the COT shared additional ID.

9. The method according to claim 1, wherein The second SCI also includes information related to the COT duration.

10. The method according to claim 1, further comprising the steps of: Sidelink transmission is performed based on the COT sharing.

11. The method according to claim 10, wherein: Based on receiving the PSCCH and the PSSCH in the frequency domain, the sidelink transmission is performed in the frequency domain based on the COT sharing.

12. The method according to claim 11, wherein Based on the second SCI not including frequency resource information for the COT sharing, the sidelink transmission is performed in the frequency domain based on the COT sharing.

13. The method according to claim 1, further comprising the steps of: receiving, from a third device, a PSSCH associated with a second destination ID included in the COT shared additional ID or the first destination ID; as well as performing a physical sidelink feedback channel (PSFCH) transmission in response to the PSSCH from the third device, The PSFCH transmission is performed based on the COT sharing.

14. A first device adapted to perform wireless communication, the first device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the first device to perform operations upon execution by the at least one processor, the operations comprising: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device through a physical sidelink control channel (PSCCH); and receiving the second SCI for channel occupancy time (COT) sharing from the second device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

15. A processing device adapted to control a first device, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the first device to perform operations upon execution by the at least one processor, the operations comprising: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device through a physical sidelink control channel (PSCCH); and receiving the second SCI for channel occupancy time (COT) sharing from the second device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

16. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a first device to perform operations comprising: receiving a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) from a second device via a physical sidelink control channel (PSCCH); as well as receiving the second SCI for channel occupancy time (COT) sharing from the second device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

17. A method for performing wireless communication by a second device, the method comprising the steps of: transmitting a first sidelink shared channel (PSSCH) and second sidelink control information (SCI) for scheduling to the first device through a physical sidelink control channel (PSCCH); as well as transmitting the second SCI for channel occupancy time (COT) sharing to the first device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

18. A second device adapted to perform wireless communication, the second device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations upon execution by the at least one processor, the operations comprising: transmitting a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) to the first device through a physical sidelink control channel (PSCCH); and transmitting the second SCI for channel occupancy time (COT) sharing to the first device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

19. A processing device adapted to control a second device, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations upon execution by the at least one processor, the operations comprising: transmitting a first SCI for scheduling of a physical sidelink shared channel (PSSCH) and second sidelink control information (SCI) to the first device through a physical sidelink control channel (PSCCH); and transmitting the second SCI for channel occupancy time (COT) sharing to the first device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

20. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a second device to perform operations comprising: transmitting a first sidelink shared channel (PSSCH) and second sidelink control information (SCI) for scheduling to the first device through a physical sidelink control channel (PSCCH); as well as transmitting the second SCI for channel occupancy time (COT) sharing to the first device through the PSSCH, The second SCI includes a first source ID, a first destination ID, broadcast type information, COT shared broadcast type information, and a COT shared additional ID.

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