A method and apparatus for applying circular prefix extension in inter-terminal communication over an unlicensed band where base station-based inter-terminal communication resource allocation is performed.

Abstract

In a wireless communication system, a method for operating a first device 100 is proposed. The method includes the step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource, when information for the second resource for performing the inter-device transmission is received from the base station 300, is greater than or equal to the device processing time, wherein the device processing time includes the longest of a plurality of extension times associated with a cyclic prefix extension allowed for the inter-device transmission.

Description

[Technical Field]

[0001] This disclosure relates to wireless communication systems. [Background technology]

[0002] 5G NR is a new clean-slate mobile communication system that succeeds LTE (Long Term Evolution) and features high performance, low latency, and high availability. 5G NR can utilize all available spectral resources, from the low-frequency band below 1 GHz to the intermediate-frequency band between 1 GHz and 10 GHz, and the high-frequency (millimeter wave) band above 24 GHz.

[0003] The goals of 6G (wireless communication) systems include (i) extremely high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) extremely low latency, (v) reduced energy consumption of battery-free IoT (Internet of Things) devices, (vi) ultra-high reliability connectivity, and (vii) connected intelligence with machine learning capabilities. The vision for 6G systems has four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and 6G systems can satisfy the requirements shown in Table 1 below. For example, Table 1 can show an example of the requirements for a 6G system.

[0004] [Table 1] [Overview of the project] [Means for solving the problem]

[0005] According to one embodiment of the present disclosure, a method can be provided for a first device to perform wireless communication. For example, the method includes: receiving information from a base station for a second resource to perform an inter-device transmission based on a first resource; and deciding to perform the inter-device transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a device processing time; wherein the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0006] According to one embodiment of the present disclosure, a first device for performing wireless communication can be provided. For example, the first device includes: at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and, based on being executed by the at least one processor, storing instructions for the first device to perform an operation. For example, the operation includes: receiving information from a base station for a second resource to perform an inter-device transmission based on a first resource; and deciding to perform the inter-device transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a device processing time; wherein the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0007] According to one embodiment of the present disclosure, a device configured to control a first terminal can be provided. For example, the device includes: at least one processor; and at least one memory which can be executablely coupled to the at least one processor and which records instructions for the first terminal to perform an operation, based on that it is executed by the at least one processor. For example, the operation includes: receiving information from a base station for a second resource to perform an inter-UE transmission based on a first resource; and deciding to perform the inter-UE transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a terminal processing time; wherein the terminal processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-UE transmission.

[0008] According to one embodiment of the present disclosure, a storage medium readable by a non-temporary computer recording an instruction can be provided. For example, the instruction, when executed, causes a first device to: receive information from a base station for a second resource to perform an inter-device transmission based on a first resource; and decide to perform the inter-device transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to the device processing time, wherein the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0009] According to one embodiment of the present disclosure, a method can be provided for a second device to perform wireless communication. For example, the method includes: receiving an inter-device transmission from a first device based on a second resource, the inter-device transmission being determined to be performed on the basis that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time, the first resource being a resource for which information regarding the second resource has been received from a base station to the first device, the device processing time including a first extension time associated with a cyclic prefix extension, and the first extension time being the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0010] According to one embodiment of the present disclosure, a second device for performing wireless communication can be provided. For example, the second device includes: at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and, based on being executed by the at least one processor, storing instructions for the second device to perform an operation. For example, the operation includes: receiving an inter-device transmission from a first device based on a second resource, the inter-device transmission being determined to be performed on the basis that the time interval from the end of the first resource to the start of the second resource is greater than or equal to a device processing time, the first resource being a resource for which information regarding the second resource has been received from a base station to the first device, the device processing time including a first extension time associated with a cyclic prefix extension, and the first extension time being the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission. [Brief explanation of the drawing]

[0011] [Figure 1] This disclosure shows a communication structure that can be provided in a 6G system according to one embodiment of this disclosure. [Figure 2]An electromagnetic spectrum according to one embodiment of this disclosure is shown. [Figure 3] This disclosure presents an example of a typical NTN scenario based on a transparent payload, according to one embodiment of this disclosure. [Figure 4] This disclosure presents an example of a typical NTN scenario based on a regenerative payload, according to one embodiment of this disclosure. [Figure 5] An example of sensing operation according to one embodiment of this disclosure is shown. [Figure 6] This shows a frame slot structure according to one embodiment of the present disclosure. [Figure 7] An example of a BWP according to one embodiment of this disclosure is shown. [Figure 8] One embodiment of this disclosure illustrates a procedure for a terminal to perform V2X or SL communication depending on the resource allocation mode. [Figure 9] An example of a wireless communication system supporting an unlicensed frequency band, according to one embodiment of this disclosure, is shown. [Figure 10] One embodiment of this disclosure describes a method for occupying resources within an unlicensed zone. [Figure 11] One embodiment of this disclosure shows a case in which multiple LBT-SBs are included in an unlicensed band. [Figure 12] This invention illustrates a channel access procedure (e.g., CAP) operation for downlink signal transmission over an unlicensed band at a base station, according to one embodiment of this disclosure. [Figure 13] This invention illustrates the operation of a Type 1 channel access procedure (e.g., CAP) for a terminal for uplink signal transmission according to one embodiment of this disclosure. [Figure 14] This invention provides a procedure for an embodiment in which a device determines whether or not to perform inter-terminal transmission (e.g., SL transmission) based on terminal processing time. [Figure 15]This invention provides an embodiment of a method for determining the longest extension time by numerology. [Figure 16] One embodiment of this disclosure illustrates a method by which a first device performs wireless communication. [Figure 17] One embodiment of this disclosure illustrates a method by which a second device performs wireless communication. [Figure 18] A communication system 1 according to one embodiment of this disclosure is shown. [Figure 19] A wireless device according to one embodiment of this disclosure is shown. [Figure 20] A signal processing circuit for a transmitted signal according to one embodiment of this disclosure is shown. [Figure 21] A wireless device according to one embodiment of this disclosure is shown. [Figure 22] A portable device according to one embodiment of this disclosure is shown. [Figure 23] An embodiment of the present disclosure shows a vehicle or an autonomous vehicle. [Modes for carrying out the invention]

[0012] In this specification, "A or B" may mean "just A," "just B," or "both A and B." Furthermore, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B or C" may mean "just A," "just B," "just C," or "any combination of A, B and C."

[0013] In this specification, slashes ( / ) and commas can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "just A", "just B", or "both A and B". For example, "A, B, C" can mean "A, B or C".

[0014] In this specification, "at least one of A and B" can mean "just A," "just B," or "both A and B." Furthermore, in this specification, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted in the same way as "at least one of A and B."

[0015] Furthermore, in this specification, "at least one of A, B and C" may mean "just A," "just B," "just C," or "any combination of A, B and C." Also, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0016] Furthermore, parentheses used in this specification can mean "for example." Specifically, when "control information (PDCCH)" is shown, "PDCCH" is proposed as an example of "control information." Also, "control information" in this specification is not limited to "PDCCH," and "PDCCH" is proposed as an example of "control information." Similarly, when "control information (i.e., PDCCH)" is shown, "PDCCH" is proposed as an example of "control information."

[0017] In the following explanation, "when, if, in case of" can be replaced with "based on".

[0018] In this specification, technical features described individually within a single drawing may be represented individually or simultaneously.

[0019] In this specification, higher layer parameters may be parameters that are set for a terminal, pre-configured, or predefined. For example, a base station or network may transmit higher layer parameters to a terminal. For example, higher layer parameters may be transmitted via RRC (radio resource control) signaling or MAC (medium access control) signaling.

[0020] In this specification, "configured or defined" can be interpreted as being configured or pre-configured in the device via predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In this specification, "configured or defined" can be interpreted as being pre-configured in the device.

[0021] The technologies proposed herein can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented in wireless technologies such as UTRA (universal terrestrial radio access) and CDMA2000. TDMA can be implemented in wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented in wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0022] The technologies proposed herein are implemented in 6G wireless technology and can be applied to various 6G systems. For example, 6G systems can have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0023] Figure 1 shows a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of Figure 1 can be combined with various embodiments of the present disclosure.

[0024] The new network characteristics in 6G are as follows:

[0025] - Satellite integrated network

[0026] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, updating wireless technology from "connected things" to "connected intelligence." AI can be applied to each step of the communication procedure (or each step of the signal processing described below).

[0027] - Seamless integration of wireless information and energy transfer

[0028] - Ubiquitous Super 3D Connectivity: Connecting drones and very low Earth orbit satellites to the network and core network functions creates Super 3D connectivity in 6G ubiquitous.

[0029] The following are some common requirements for the characteristics of the new 6G network described above:

[0030] - Small cell networks

[0031] - Ultra-dense heterogeneous network

[0032] - High-capacity backhaul

[0033] - Raider technology integrated with mobile technology: High-precision localization (or location-based services) via communications is one of the functions of 6G wireless communication systems. Therefore, radar systems can be integrated with 6G networks.

[0034] - Softwareization and virtualization

[0035] The core implementation technologies for 6G systems will be described below.

[0036] - Artificial Intelligence: Introducing AI into communications simplifies and improves real-time data transmission. AI can use numerous analyses to determine how complex target operations are performed. In other words, AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine communications. Furthermore, AI enables rapid communication in BCI (Brain-Computer Interface). AI-based communication systems are supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radio, self-sustaining wireless networks, and machine learning.

[0037] -THz communication (terahertz communication): Data transmission rates can be increased by increasing bandwidth. This can be achieved by using sub-THz communication with a wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, typically represent a frequency band between 0.1 THz and 10 THz with wavelengths in the 0.03 mm–3 mm range. The 100 GHz–300 GHz band range (Sub THz band) is considered the main part of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Of the defined THz band, 300 GHz–3 THz lies in the far-infrared (IR) frequency band. The 300 GHz–3 THz band is part of a broadband but lies at the broadband boundary, just behind the RF band. Therefore, this 300 GHz–3 THz band is similar to RF. Figure 2 shows the electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment in Figure 2 can be combined with various embodiments of the present disclosure. The main characteristics of THz communication include (i) a wide bandwidth available to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are essential). The narrow beamwidth generated by highly directional antennas reduces interference. The small wavelength of THz signals allows more antenna elements to be integrated into equipment and BS operating in this band. Through this, advanced adaptive array techniques can be used to overcome range limitations.

[0038] - Large-scale MIMO technology

[0039] - Hologram beamforming (HBF)

[0040] -Optical wireless technology

[0041] - Free-space optical backhaul network (FSO backhaul network)

[0042] -Quantum communication

[0043] - Cell-free communication

[0044] - Integration of wireless information and power transmission

[0045] - Integration of sensing and communication (wireless communication and scanning)

[0046] - Integrated access and backhaul network

[0047] - Big data analysis

[0048] - Reconfigurable intelligent surface

[0049] - Metaverse

[0050] - Blockchain

[0051] - Unmanned aerial vehicles (UAVs): UAVs, or drones, will be a crucial element in 6G wireless communication. In most cases, high-speed data wireless connectivity will be provided using UAV technology. Base station (BS) entities can be installed on UAVs to provide cellular connectivity. UAVs have certain features not found in fixed BS infrastructure, such as easy deployment, strong visible line links, and the freedom of controlled mobility. During emergencies such as natural disasters, the deployment of ground communication infrastructure is not economically feasible and sometimes cannot provide services in volatile environments. UAVs can easily handle such situations. UAVs can become a new paradigm in the field of wireless communication. This technology facilitates the three basic requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support various purposes such as improving network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most important technologies for 6G communication.

[0052] - Advanced air mobility (AAM): AAM is a broader concept than UAM (urban air mobility), which refers to air transport available in urban areas, and can refer to transportation methods that include not only urban areas but also travel between regional hubs.

[0053] - Autonomous driving (self-driving): V2X (vehicle to everything), a crucial element in building autonomous driving infrastructure, can be a technology that allows vehicles to communicate and share information with various elements on the road for autonomous driving, including vehicle-to-vehicle (V2V) wireless communication and vehicle-to-infrastructure (V2I) wireless communication. To maximize the performance of autonomous driving and ensure high safety, fast transmission speeds and low latency technology are absolutely necessary. Furthermore, in the future, autonomous driving will go beyond simply transmitting warnings and guidance messages to the driver and will need to actively intervene in vehicle operation and directly control the vehicle in dangerous situations. For this reason, the amount of information that needs to be transmitted and received may become enormous, so it is expected that 6G will be able to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0054] - Non-terrestrial networks (NTN): NTN can refer to a network or network segment that uses RF (radio frequency) resources onboard a satellite (or UAS (unmanned aerial system) platform). Figure 3 shows an example of a typical scenario of NTN based on a transparent payload according to one embodiment of this disclosure. Figure 4 shows an example of a typical scenario of NTN based on a regenerative payload according to one embodiment of this disclosure. Embodiments of Figure 3 or Figure 4 can be combined with various embodiments of this disclosure. Referring to Figure 3, the satellite (or UAS platform) can generate a service link with the UE. The satellite (or UAS platform) can connect to a gateway via a feeder link. The satellite can connect to a data network via a gateway. Beam footprint can mean the area from which signals transmitted by the satellite can be received. Referring to Figure 4, the satellite (or UAS platform) can generate a service link with the UE. A satellite (or UAS platform) connected to a UE can connect to other satellites (or UAS platforms) via ISLs (inter-satellite links). Other satellites (or UAS platforms) can connect to gateways via feeder links. Based on the regenerated payload, the satellite can connect to the data network via gateways with other satellites. If an ISL does not exist between satellites, a feeder link may be required between the satellite and the gateway. Figures 3 and 4 are merely examples of NTN scenarios, and NTN can implement various scenarios.For example, a satellite (or UAS platform) can implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) can generate various beams over a specified service area depending on the satellite's (or UAS platform's) field of view. For example, the satellite's (or UAS platform's) field of view may vary depending on the onboard antenna diagram and the elevation angle. For example, a transparent payload may include radio frequency filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be altered. For example, a regenerative payload may include radio frequency filtering, frequency conversion, and amplification, demodulation / decoding, switching and / or routing, coding / modulation. For example, a regenerative payload is substantially the same as mounting all or part of the base station functions on a satellite (or UAS platform).

[0055] - Integrated Sensing and Communication (ISAC): Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc., of an object, thereby obtaining information about the characteristics of the environment and / or objects within that environment. Because wireless frequency sensing does not require connection to an object via a device in the network, it can provide a service for determining object location without any device. The ability to obtain range, velocity, and angle information from wireless frequency signals can provide a wide range of new functions such as various object sensing, object recognition (e.g., vehicles, people, animals, UAVs), and high-precision location determination, tracking, and activity recognition. Wireless sensing services can provide information to various industries (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.) enabling applications such as intruder detection, control and navigation of auxiliary vehicles, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can use non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP (registered trademark; hereafter the same) based sensing. For example, the operation of a wireless sensing service, i.e., sensing operation, can depend on the transmission, reflection, and scattering of wireless sensing signals. Thus, wireless sensing can provide an opportunity to enhance existing communication systems with wireless and sensing networks in communication networks. Figure 5 shows an example of sensing operation according to one embodiment of the present disclosure. The embodiment of Figure 5 can be combined with various embodiments of the present disclosure. Specifically, Figure 5(a) shows an example of sensing using a sensing receiver and sensing transmitter located in the same position (e.g., monostatic sensing), and Figure 5(b) shows an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0056] The layers of the Radio Interface Protocol (RRC) between a terminal and a network can be divided into L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the three lower layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. Of these, the physical layer, which belongs to Layer 1, provides information transfer services using physical channels, while the Radio Resource Control (RRC) layer, located in Layer 3, plays the role of controlling radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0057] The physical layer provides information transfer services to higher layers using physical channels. The physical layer is connected to the higher layer, the MAC (Medium Access Control) layer, via transport channels. Data moves between the MAC layer and the physical layer via these transport channels. Transport channels are classified according to how and with what characteristics data is transmitted via the wireless interface.

[0058] Data travels between different physical layers, i.e., between the physical layers of the transmitter and receiver, via a physical channel. This physical channel can be modulated using the OFDM (Orthogonal Frequency Division Multiplexing) method, utilizing time and frequency as wireless resources.

[0059] The MAC layer provides services to the higher-level RLC (radio link control) layer via logical channels. The MAC layer provides mapping functionality from multiple logical channels to multiple transport channels. Furthermore, the MAC layer provides logical channel multiplexing functionality through mapping from multiple logical channels to a single transport channel. The MAC sub-layer provides data transfer services on logical channels.

[0060] The RLC hierarchy performs concatenation, segmentation, and reassembly of RLC SDUs (Service Data Units). To ensure the diverse Quality of Service (QoS) requirements of radio bearers (RBs), the RLC hierarchy provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction via ARQ (automatic repeat request).

[0061] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmit channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. RB refers to the logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transmission between the terminal and the network.

[0062] The functions of the PDCP hierarchy on the user plane include the transmission of user data, header compression, and encryption. The functions of the PDCP hierarchy on the control plane include the transmission of control plane data and encryption / integrity protection.

[0063] The SDAP (Service Data Adaptation Protocol) layer is defined only at the user level. The SDAP layer performs tasks such as mapping QoS flows to data radio bearers and marking QoS flow identifiers (IDs) in downlink and uplink packets.

[0064] Setting up a Radio Bearing (RB) refers to the process of defining the characteristics of the radio protocol hierarchy and channel in order to provide a specific service, and setting the specific parameters and operating methods for each. Furthermore, RBs are divided into two types: SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer). The SRB is used as a channel for transmitting RRC messages in the control plane, while the DRB is used as a channel for transmitting user data in the user plane.

[0065] When an RRC connection is established between the terminal's RRC layer and the base station's RRC layer, the terminal enters the RRC_CONNECTED state; otherwise, it enters the RRC_IDLE state. In the case of NR, an additional RRC_INACTIVE state is defined, in which a terminal in the RRC_INACTIVE state can maintain its connection with the core network and release its connection with the base station.

[0066] Downlink transport channels, which transmit data from the network to terminals, include BCH (Broadcast Channel) for transmitting system information and Downlink SCH (Shared Channel) for transmitting user traffic and control messages. Downlink multicast or broadcast service traffic or control messages can be transmitted via Downlink SCH or via a separate Downlink MCH (Multicast Channel). On the other hand, uplink transport channels, which transmit data from terminals to the network, include RACH (Random Access Channel) for transmitting initial control messages and Uplink SCH (Shared Channel) for transmitting user traffic and control messages.

[0067] Above the transport channel level, logical channels mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0068] Radio frames can be used for uplink and downlink transmissions. A radio frame has a length of 10ms and can be defined as two 5ms half-frames (HF). A half-frame can contain five 1ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots within a subframe can be determined by the subcarrier spacing (SCS). Each slot can contain 12 or 14 OFDM(A) symbols by a cyclic prefix (CP).

[0069] When normal CP is used, each slot can contain 14 symbols. When extended CP is used, each slot can contain 12 symbols. Here, symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA (Single Carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0070] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when a normal CP or extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0071] [Table 2]

[0072] Figure 6 shows a frame slot structure according to one embodiment of the present disclosure. The embodiment in Figure 6 can be combined with various embodiments of the present disclosure.

[0073] Referring to Figure 6, a slot contains multiple symbols in the time domain.

[0074] A carrier wave contains multiple subcarriers in the frequency domain. A Resource Block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) can be defined as multiple consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length). A carrier wave can contain up to N (e.g., 5) BWPs. Data communication can be performed via active BWPs. Each element can be called a Resource Element (RE) in the resource grid and can be mapped to a single complex symbol.

[0075] A Bandwidth Part (BWP) is a contiguous set of Physical Resource Blocks (PRBs) for a given numerology. PRBs can be selected from a contiguous subset of Common Resource Blocks (CRBs) for a given numerology on a given carrier.

[0076] Figure 7 shows an example of a BWP according to one embodiment of the present disclosure. The embodiment in Figure 7 can be combined with various embodiments of the present disclosure. In the embodiment of Figure 7, it is assumed that there are three BWPs.

[0077] Referring to Figure 7, the CRB (common resource block) is a carrier resource block numbered from one end of the carrier band to the other. The PRB is a resource block numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0078] BWP is point A, offset (N) from point A. start BWP) and bandwidth (N size BWP ) can be set. For example, point A is the external reference point of the PRB of the carrier where sub-carrier 0 of all numerologies (e.g., all numerologies supported by the network in the corresponding carrier) is aligned. For example, the offset is the PRB interval between the lowest sub-carrier in a given numerology and point A. For example, the bandwidth is the number of PRBs in a given numerology.

[0079] SLSS (Sidelink Synchronization Signal) is a sidelink (SL)-specific sequence that can include a PSSS (Primary Sidelink Synchronization Signal) and an SSSS (Secondary Sidelink Synchronization Signal). The PSSS can be referred to as S-PSS (Sidelink Primary Synchronization Signal), and the SSSS can be referred to as S-SSS (Sidelink Secondary Synchronization Signal). For example, length-127 M-sequences can be used for S-PSS, and length-127 Gold sequences can be used for S-SSS. For example, a terminal can use S-PSS to detect the first signal and acquire synchronization. For example, a terminal can use S-PSS and S-SSS to acquire detailed synchronization and detect the synchronization signal ID.

[0080] The PSBCH (Physical Sidelink Broadcast Channel) is a channel through which fundamental (system) information that terminals should know first before transmitting or receiving SL signals is transmitted (broadcast). For example, this fundamental information includes information related to SLSS, duplex mode (DM), TDD UL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, application types related to SLSS, subframe offset, and broadcast information. For example, to evaluate PSBCH performance, in NR V2X, the size of the PSBCH payload is 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0081] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., an SLSS (Synchronization Signal) / PSBCH block, hereinafter referred to as S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB can have the same numerology (i.e., SCS and CP lengths) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in the carrier, and its transmission bandwidth is within a (pre-configured) Sidelink Bandwidth Part (SL BWP). For example, the bandwidth of the S-SSB is 11RB (Resource Block). For example, the PSBCH spans 11RB. The frequency position of the S-SSB can be (pre-configured). Therefore, the terminal does not need to perform hypothesis detection on frequency to find the S-SSB in the carrier.

[0082] In this specification, PSCCH can be replaced by a control channel, a physical control channel, a control channel associated with a side link, a physical control channel associated with a side link, etc. In this specification, PSSCH can be replaced by a shared channel, a physical shared channel, a shared channel associated with a side link, a physical shared channel associated with a side link, etc.

[0083] Figure 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure. The embodiment in Figure 8 can be combined with various embodiments of the present disclosure.

[0084] Referring to Figure 8(a), in resource allocation mode 1, the base station can schedule SL resources to be used by the terminal for SL transmission. For example, in step S800, the base station can transmit information related to the SL resources and / or information related to the UL resources to the first terminal. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0085] For example, the first terminal can receive from the base station information related to a DG (dynamic grant) resource and / or information related to a CG (configured grant) resource. For example, a CG resource may include a CG type 1 resource or a CG type 2 resource. In this specification, a DG resource may be a resource that the base station configures / assigns to the first terminal via DCI (downlink control information). In this specification, a CG resource may be a (periodic) resource that the base station configures / assigns to the first terminal via DCI and / or RRC messages. For example, in the case of a CG type 1 resource, the base station may send an RRC message containing information related to the CG resource to the first terminal. For example, in the case of a CG type 2 resource, the base station may send an RRC message containing information related to the CG resource to the first terminal, and the base station may send DCI related to the activation or release of the CG resource to the first terminal.

[0086] In step S810, the first terminal can transmit a PSCCH (e.g., SCI (Sidelink Control Information) or 1st-stage SCI) to the second terminal based on the resource scheduling. In step S820, the first terminal can transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) associated with the PSCCH to the second terminal. In step S830, the first terminal can receive a PSFCH associated with the PSCCH / PSSCH from the second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) can be received from the second terminal via the PSFCH. In step S840, the first terminal can transmit / report the HARQ feedback information to the base station via PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on the HARQ feedback information received from the second terminal. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on pre-configured rules. For example, the DCI may be a DCI for scheduling SLs.

[0087] Referring to Figure 8(b), in resource allocation mode 2, the terminal can determine an SL transmission resource from the SL resources set by the base station / network or from the pre-configured SL resources. For example, the set SL resources or pre-configured SL resources may be a resource pool. For example, the terminal can autonomously select or schedule resources for SL transmission. For example, the terminal can select resources itself from the configured resource pool and perform SL communication. For example, the terminal can perform sensing and resource (re)selection procedures and select resources itself within the selection window. For example, the sensing may be performed in units of subchannels. For example, in step S810, the first terminal that has selected resources itself from the resource pool can use those resources to send PSCCH (e.g., SCI (Sidelink Control Information) or 1 st -stage SCI) can be transmitted to the second terminal. In step S820, the first terminal transmits a PSSCH (e.g., 2) associated with the PSCCH. nd -Stage SCI, MAC PDU, data, etc. can be transmitted to the second terminal. In step S830, the first terminal can receive the PSFCH associated with the PSCCH / PSSCH from the second terminal.

[0088] Referring to Figure 8(a) or (b), for example, the first terminal can transmit an SCI over the PSCCH to the second terminal. Alternatively, for example, the first terminal can transmit two consecutive SCIs (e.g., a 2-stage SCI) over the PSCCH and / or PSSCH to the second terminal. In this case, the second terminal can decode the two consecutive SCIs (e.g., a 2-stage SCI) to receive the PSSCH from the first terminal. In this specification, an SCI transmitted over the PSCCH is 1 st SCI, 1st SCI, 1 st -stage SCI or 1 st -Stage SCI format, which can be called the SCI format, is transmitted over PSSCH. nd SCI, 2nd SCI, 2 nd-stage SCI or 2 nd - This can be called the stage SCI format.

[0089] Referring to Figure 8(a) or (b), in step S830, the first terminal can receive the PSFCH. For example, the first and second terminals can determine the PSFCH resource, and the second terminal can use the PSFCH resource to send HARQ feedback to the first terminal.

[0090] Referring to Figure 8(a), in step S840, the first terminal can transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0091] On the other hand, conventional NR-U (unlicensed spectrum) supports communication methods between terminals and base stations in the unlicensed band (or shared spectrum). Furthermore, Rel-18 is planned to support a mechanism that will enable communication between sidelink terminals in the unlicensed band.

[0092] In this disclosure, "channel" may refer to a frequency-axis resource set that performs LBT (Listen-Before-Talk). In NR-U, "channel" may mean a 20 MHz LBT bandwidth and may have the same meaning as a resource block (e.g., RB) set. For example, a resource block (e.g., RB) set can be defined in Section 7 of 3GPP TS 38.214 V17.0.0.

[0093] In this disclosure, CO (channel occupancy) may mean the time / frequency-axis resources acquired by the base station or terminal after LBT success.

[0094] In this disclosure, COT (channel occupancy time) can mean the time-axis resources acquired by a base station or terminal after LBT success. COT can be shared between base stations (or terminals) that have acquired it, and this can be called COT sharing. Depending on the initiating device, this can be called gNB-initiated COT or UE-initiated COT.

[0095] The following describes wireless communication systems that support the unlicensed band (shared spectrum).

[0096] Figure 9 shows an example of a wireless communication system supporting an unlicensed band according to one embodiment of the present disclosure. For example, Figure 9 may include an NR-U (unlicensed spectrum) wireless communication system. The embodiment of Figure 9 can be combined with various embodiments of the present disclosure.

[0097] In the following description, a cell operating in the licensed band (hereinafter referred to as the L-band) can be defined as an LCell, and the carrier of an LCell can be defined as (DL / UL / SL)LCC. Similarly, a cell operating in the unlicensed band (hereinafter referred to as the U-band) can be defined as a UCell, and the carrier of a UCell can be defined as (DL / UL / SL)UCC. The cell's carrier / carrier-frequency can refer to the cell's operating frequency (e.g., center frequency). A cell / carrier (e.g., CC) can be called a cell.

[0098] As shown in Figure 9(a), when a terminal and base station transmit and receive signals via carrier-coupled LCC and UCC, the LCC can be set as PCC (Primary CC) and the UCC as SCC (Secondary CC). As shown in Figure 9(b), a terminal and base station can transmit and receive signals via a single UCC or multiple carrier-coupled UCCs. That is, a terminal and base station can transmit and receive signals via UCC(s) only without an LCC. For standalone operation, UCell can support physical channel (e.g., PRACH, PUCCH, PUSCH) transmission and SRS transmission.

[0099] In the embodiment shown in Figure 9, the base station can be replaced by a terminal. In this case, for example, UCell can support physical channel (e.g., PSCCH, PSSCH, PSFCH) transmission and S-SSB transmission.

[0100] Unless otherwise specified, the following definitions apply to the terms used herein. For example, in this disclosure, unlicensed band and shared spectrum may be interchangeable. For example, in this disclosure, channel sensing (on a shared spectrum) may mean channel sensing associated with a channel access procedure (e.g., a CAP). The channel access procedure (e.g., a CAP) may include a channel sensing step for a resource (or channel) on which to perform a transmission.

[0101] - Channel: A contiguous block of resources (e.g., RBs) in which channel access procedures are performed in a shared spectrum, and can refer to a carrier wave or a portion of a carrier wave.

[0102] -Channel Access Procedure (CAP): This refers to a procedure for evaluating channel availability based on sensing in order to determine whether other communication nodes can use the channel before transmitting a signal. The basic unit for sensing is T sl = A sensing slot with a duration of 9us. The base station or terminal senses the channel during the sensing slot interval, and the power detected within the sensing slot interval for at least 4us is the energy detection threshold X Thresh If smaller, sensing slot interval T sl This is considered an idle state. Otherwise, sensing slot interval T sl =9us is considered a busy state. A channel access procedure (e.g., CAP) can be referred to as an LBT (Listen-Before-Talk). For example, a channel access procedure (e.g., CAP) can include an LBT, and channel sensing can be performed to monitor the power of the channel in question during a specific time interval (channel sensing interval) for the channel access procedure (e.g., CAP).

[0103] -Channel occupancy: This refers to the corresponding transmission(s) on the channel(s) by the base station / terminal after the channel access procedure has been performed.

[0104] - Channel occupancy time (COT): This refers to the total time that a base station / terminal can transmit on a channel after it has performed a channel access procedure, and that base station / terminal and any other base stations / terminals sharing the channel occupancy can transmit on the channel. When determining COT, if the transmit gap is 25us or less, the gap period is also counted in the COT. COT can be shared for transmission between a base station and its corresponding terminals.

[0105] - A base station-to-terminal (e.g., DL) transmit burst is defined as a set of transmits from a base station that does not have a gap exceeding 16us. Transmits from a base station separated by a gap exceeding 16us are considered separate base station-to-terminal transmit (e.g., DL transmit) bursts. The base station does not sense channel availability within a base station-to-terminal transmit (e.g., DL transmit) burst and can perform transmits after the gap.

[0106] -Terminal-to-base station (e.g., UL) or terminal-to-terminal (e.g., SL) transmit burst: Defined as a set of transmits from a terminal with no gaps exceeding 16us. Transmits from a terminal separated by gaps exceeding 16us are considered separate terminal-to-base station (e.g., UL) or terminal-to-terminal (e.g., SL) transmit bursts. A terminal does not sense channel availability within a terminal-to-base station (e.g., UL) or terminal-to-terminal (e.g., SL) transmit burst and can perform transmits after the gap.

[0107] -Discovery burst: Refers to a base station-to-terminal (e.g., DL) transmit burst that is limited to a (time) window and associated with a duty cycle, and includes a set of signals and / or channels. In LTE-based systems, a discovery burst is a transmit initiated by the base station and includes synchronization signals (e.g., PSS, SSS) and reference signals (e.g., CRS (cell-specific RS)), and may further include a non-zero power channel state information reference signal (e.g., CSI-RS). In an NR-based system, a discovery burst may, as a transmission initiated by a base station, include at least a synchronization signal / physical broadcast channel (e.g., SS / PBCH) block, a control resource set (e.g., CORESET) for a physical base station-to-terminal control channel (e.g., PDCCH) that schedules a physical base station-to-terminal shared channel (e.g., PDSCH) having SIB1, a base station-to-terminal shared channel (e.g., PDSCH) carrying SIB1, and / or a non-zero power channel state information reference signal (e.g., CSI-RS).

[0108] Figure 10 illustrates a method for occupying resources within an unlicensed zone according to one embodiment of the present disclosure. The embodiment of Figure 10 can be combined with various embodiments of the present disclosure.

[0109] Referring to Figure 10, communication nodes (e.g., base stations, terminals) in an unlicensed band must determine the availability of channels for other communication nodes before transmitting a signal. For this purpose, communication nodes in an unlicensed band can perform a channel access procedure (CAP) to connect to the channel on which the transmission will take place. The channel access procedure can be performed based on sensing. For example, a communication node can determine whether other communication nodes are transmitting a signal by performing Carrier Sensing (CS) before transmitting a signal. If it is determined that other communication nodes are not transmitting a signal, this is defined as a Clear Channel Assessment (CCA). A CCA threshold (e.g., X) is defined or set by a higher-level hierarchical level (e.g., RRC). Thresh When a CCA threshold is met, a communication node can determine the channel state to be busy if energy higher than the CCA threshold is detected on the channel, and idle otherwise. When the channel state is determined to be idle, the communication node can begin transmitting signals in the unlicensed band. A channel access procedure (e.g., CAP) can be replaced by an LBT. For example, a channel access procedure (e.g., CAP) can include an LBT, and channel sensing can be performed to monitor the power of the channel in question during a specific time interval (channel sensing interval) for the channel access procedure (e.g., CAP).

[0110] Table 3 illustrates the channel access procedures (CAPs) supported in NR-U.

[0111] [Table 3]

[0112] Referring to Table 3, LBT types or channel access procedures (e.g., CAPs) can be defined for base station-to-terminal / terminal-to-base station / terminal-to-terminal (e.g., DL / UL / SL) transmissions. However, Table 3 is merely illustrative, and new types or channel access procedures (e.g., CAPs) can be defined for similar schemes. For example, Type 1 (also called Cat-4 LBT) is a random back-off based channel access procedure. For example, in the case of Cat-4, the contention window can be changed. For example, Type 2 can be performed in case of COT sharing within COT acquired by gNB or UE.

[0113] The following describes LBT-SB (SubBand) (or resource block (e.g., RB) sets).

[0114] In a wireless communication system supporting unlicensed bands, a single cell (or carrier (e.g., CC)) or subbandwidth (e.g., BWP) configured at a terminal can consist of a wideband with a larger bandwidth (BW) than existing LTE; however, the bandwidth (e.g., BW) required for CCA based on independent LBT operation may be limited based on regulations, etc. If we define an LBT-SB as a subband (SB) in which individual LBT is performed, then multiple LBT-SBs can be contained within a single wideband cell / subbandwidth (e.g., BWP). The set of resource blocks (e.g., RBs) that constitute an LBT-SB can be configured via higher-level (e.g., RRC) signaling. Therefore, based on (i) the bandwidth (e.g., BW) of the cell / subbandwidth (e.g., BWP) and (ii) the allocation information of the set of resource blocks (e.g., RBs), one or more LBT-SBs can be contained within a single cell / subbandwidth (e.g., BWP).

[0115] Figure 11 shows a case in which multiple LBT-SBs are included in an unlicensed band according to one embodiment of the present disclosure. The embodiment in Figure 11 can be combined with various embodiments of the present disclosure.

[0116] Referring to Figure 11, a partial bandwidth (e.g., BWP) of a cell (or carrier) can contain multiple LBT-SBs. An LBT-SB can have, for example, a 20 MHz bandwidth. An LBT-SB consists of multiple consecutive (physical) resource blocks (e.g., (P)RB) in the frequency domain and can be referred to as a set of (physical) resource blocks (e.g., (P)RB). Although not shown, guard bands (GB) can be included between LBT-SBs. Thus, a partial bandwidth (e.g., BWP) can be configured in the form {LBT-SB#0(RB set#0)+GB#0+LBT-SB#1(RB set#1+GB#1)+...+LBT-SB#(K-1)(RB set(#K-1))}. For convenience, the LBT-SB / RB index can be set / defined to start from lower frequency bands and increase as you go to higher frequency bands.

[0117] The following explains CAPC (channel access priority class).

[0118] The MAC control element (e.g., CE) and the CAPC of the wireless bearer are fixed or configurable to operate in FR1:

[0119] - Padding BSR (buffer status report) and recommended bit rate MAC control elements (e.g., CE) are fixed to the lowest priority;

[0120] - Fixed to the highest priority for SRB0, SRB1, SRB3 and other MAC control elements (e.g., CE);

[0121] - Consists of base stations for SRB2 and DRB.

[0122] When selecting a CAPC for a DRB, the base station considers fairness between transmissions and other traffic types while taking into account the 5QIs of all QoS flows multiplexed to the DRB. Table 4 shows which CAPC should be used for a given QoS flow, i.e., the CAPC to be used for a given QoS flow. For standardized 5QIs, the CAPCs are defined as shown in the table below, and for non-standardized 5QIs, the CAPC with the most suitable QoS characteristics should be used.

[0123] [Table 4]

[0124] The following describes a method for transmitting downlink signals over an unlicensed band. For example, this method can be applied to a method for transmitting sidelink signals over an unlicensed band.

[0125] A base station may perform one of the following channel access procedures (CAPs) to transmit downlink signals in an unlicensed band:

[0126] (1) Channel access procedure (e.g., CAP) method for Type 1 base station-to-terminal (e.g., downlink (DL))

[0127] In a Type 1 base station-to-terminal (e.g., DL) channel access procedure (e.g., CAP), the length of the time interval spanned by sensing slots sensed as idle before transmission is random. A Type 1 base station-to-terminal (e.g., DL) channel access procedure (e.g., CAP) can be applied to the following transmissions:

[0128] -(i) a unicast physical base station-to-terminal shared channel (e.g., PDSCH) having user plane data, or (ii) a base station-initiated transmission including a unicast physical base station-to-terminal shared channel (e.g., PDSCH) having user plane data and a unicast physical base station-to-terminal control channel (e.g., PDCCH) scheduling the user plane data, or

[0129] -(i) transmissions disclosed by a base station that consist solely of discovery bursts, or (ii) discovery bursts multiplexed with non-unicast information.

[0130] Figure 12 illustrates a channel access procedure (e.g., CAP) operation for downlink signal transmission over an unlicensed band at a base station, according to one embodiment of the present disclosure. The embodiment in Figure 12 can be combined with various embodiments of the present disclosure.

[0131] As shown in Figure 12, the base station first has a delay interval (defer duration) T d The system senses whether the channel is idle during the sensing slot interval, and if counter N becomes 0 thereafter, transmission can be performed (S134). At this time, counter N is adjusted by sensing the channel during additional sensing slot intervals (multiple) according to the following procedure:

[0132] Step 1) (S120) N = N init Set to N init 0 to CW p These are random values ​​distributed evenly among them. Next, proceed to step 4.

[0133] Step 2) (S140) If N > 0 and the base station chooses to decrement the counter, set N = N-1.

[0134] Step 3) (S150) Sensing the channel during the additional sensing slot interval. If the additional sensing slot interval is idle (Y), proceed to step 4. Otherwise (N), proceed to step 5.

[0135] Step 4) (S130) If N=0 (Y), terminate the channel access procedure (e.g., CAP) (S132). Otherwise (N), proceed to Step 2.

[0136] Step 5) (S160) Additional delay section T d A busy sensing slot is detected within the system, or an additional delay interval T is added. d The channel is sensed until all sensing slots within the device are detected as idle.

[0137] Step 6) (S170) Additional delay section T d If the channel is sensed as idle for the duration of all sensing slot intervals (Y), proceed to step 4. Otherwise (N), proceed to step 5.

[0138] Table 5 shows how channel access priority classes apply to channel access procedures (e.g., CAP). p This illustrates how the minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes can change.

[0139] [Table 5]

[0140] As shown in Table 5, you can define CWS (contention window size), maximum COT value, etc. for each CAPC. For example, T d =Tf +m p *T sl It is possible.

[0141] Delayed section T d Section T f (16us)+m p A series of consecutive sensing slot intervals T sl It is composed in the order of (9us). f The sensing slot section T is at the start of the 16us interval. sl Includes.

[0142] CW min、p <=CW p <=CW max、p That is. CW p is CW p =CW min、p It is set and can be updated prior to step 1 (CW size update) based on HARQ-ACK feedback (e.g., ACK or NACK ratio) to a base station-to-terminal (e.g., DL) burst (e.g., PDSCH). For example, CW p Previously, based on HARQ-ACK feedback for base station-to-terminal (e.g., DL) bursts, CW min、p It can be initialized to a certain value, incremented to the next highest allowed value, or retain its existing value.

[0143] (2) Channel access procedure (e.g., CAP) method for Type 2 downlink (base station-to-terminal (e.g., DL))

[0144] In a channel access procedure (e.g., CAP) for a Type 2 base station-to-terminal (e.g., DL), the length of the time interval spanned by a sensing slot sensed as idle before transmission is deterministic. A channel access procedure (e.g., CAP) for a Type 2 base station-to-terminal (e.g., DL) is classified as a channel access procedure (e.g., CAP) for a Type 2A / 2B / 2C base station-to-terminal (e.g., DL).

[0145] A channel access procedure (e.g., CAP) for a Type 2A base station-to-terminal (e.g., DL) can be applied to the following transmissions: In a channel access procedure (e.g., CAP) for a Type 2A base station-to-terminal (e.g., DL), the base station performs at least a sensing interval T short_dl A transmission can be sent immediately after the channel is sensed as idle within 25us. Here, T short_dl Section T f It consists of (=16us) followed immediately by a single sensing slot interval. f This includes a sensing slot at the start of the section.

[0146] -(i) transmissions disclosed by a base station that contain only discovery bursts, or (ii) discovery bursts multiplexed with non-unicast information, or

[0147] - Transmission by terminals (multiple) within shared channel occupancy, followed by transmission by base stations (multiple) beyond the 25us gap.

[0148] The channel access procedure (e.g., CAP) for a Type 2B base station-to-terminal (e.g., DL) is applicable to transmissions performed by the base station after a 16us gap from a transmission by the terminal within the shared channel occupancy time. In the channel access procedure (e.g., CAP) for a Type 2B base station-to-terminal (e.g., DL), the base station is T f A transmission can be sent immediately after the channel is sensed as idle within 16us. fThe sensing slot is included within the last 9us of the interval. The channel access procedure (e.g., CAP) for Type 2C base station-to-terminal (e.g., DL) is applicable to transmissions performed by the base station after a maximum 16us gap from transmissions by the terminal within the shared channel occupancy time. In the channel access procedure (e.g., CAP) for Type 2C base station-to-terminal (e.g., DL), the base station does not sense the channel before performing a transmission.

[0149] The following describes a method for transmitting uplink signals via an unlicensed band. For example, this method can be applied to a method for transmitting sidelink signals via an unlicensed band.

[0150] A terminal performs a Type 1 or Type 2 channel access procedure (e.g., CAP) for uplink signal transmission in an unlicensed band. Generally, a terminal can perform a channel access procedure (e.g., CAP) (e.g., Type 1 or Type 2) set up by the base station for uplink signal transmission. For example, a terminal-to-base station (e.g., UL) grant (e.g., DCI format 0_0, 0_1) that schedules physical terminal-to-base station shared channel (e.g., PUSCH) transmission may include information indicating the type of channel access procedure (e.g., CAP) of the terminal.

[0151] (1) Channel access procedure (e.g., CAP) method for Type 1 uplink (terminal-to-base station (e.g., UL))

[0152] In a Type 1 terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), the length of the time interval spanned by sensing slots sensed as idle before transmission is random. A Type 1 terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP) can be applied to the following transmissions:

[0153] - Shared channel (e.g., PUSCH) / SRS transmission from the base station to a physical terminal-to-base station that is scheduled and / or configured.

[0154] - The base station transmits a scheduled and / or configured physical terminal-to-base station control channel (e.g., PUCCH).

[0155] - Multiple transmissions related to RAP (Random Access Procedure)

[0156] Figure 13 shows the operation of a Type 1 channel access procedure (e.g., CAP) terminal for uplink signal transmission according to one embodiment of the present disclosure. The embodiment in Figure 13 can be combined with various embodiments of the present disclosure.

[0157] As shown in Figure 13, the terminal first enters a delay interval (defer duration) T d The system senses whether the channel is idle during the sensing slot interval, and if counter N becomes 0 thereafter, transmission can be performed (S234). At this time, counter N is adjusted by sensing the channel during additional sensing slot intervals (multiple) according to the following procedure:

[0158] Step 1) (S220) N = N init Set to N init 0 to CW p These are random values ​​distributed evenly among them. Next, proceed to step 4.

[0159] Step 2) (S240) If N > 0 and the terminal chooses to decrease the counter, set N = N-1.

[0160] Step 3) (S250) Sensing the channel during the additional sensing slot interval. If the additional sensing slot interval is idle (Y), proceed to step 4. Otherwise (N), proceed to step 5.

[0161] Step 4) (S230) If N=0 (Y), terminate the channel access procedure (e.g., CAP) (S232). Otherwise (N), proceed to Step 2.

[0162] Step 5) (S260) Additional delay section T d A busy sensing slot is detected within the system, or an additional delay interval T is added. d The channel is sensed until all sensing slots within the device are detected as idle.

[0163] Step 6) (S270) Additional delay section T d If the channel is sensed as idle for the duration of all sensing slot intervals (Y), proceed to step 4. Otherwise (N), proceed to step 5.

[0164] Table 6 shows how channel access priority classes apply to channel access procedures (e.g., CAP). p This illustrates how the minimum CW, maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes can change.

[0165] [Table 6]

[0166] As shown in Table 6, you can define CAPC-specific CWS (contention window size), maximum COT value, etc. For example, T d =T f +m p *T sl It is possible.

[0167] Delayed section T d Section T f (16us)+m p A series of consecutive sensing slot intervals Tsl It is composed in the order of (9us). f The sensing slot section T is at the start of the 16us interval. sl Includes.

[0168] CW min、p <=CW p <=CW max、p That is. CW p CW p =CW min、p It is set to and can be updated prior to step 1 (CW size update) based on explicit / implicit received responses to terminal-to-base station (e.g., UL) bursts (e.g., physical terminal-to-base station shared channels (e.g., PUSCH)). For example, CW p Based on the explicit / implicit received response to the terminal-to-base station (e.g., UL) burst previously, CW min、p It can be initialized to a certain value, incremented to the next highest allowed value, or retain its existing value.

[0169] (2) Channel access procedure (e.g., CAP) method for Type 2 uplink (terminal-to-base station (e.g., UL))

[0170] In a Type 2 terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), the length of the time interval spanned by sensing slots sensed as idle before transmission is deterministic. A Type 2 terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP) is further classified into a Type 2A / 2B / 2C terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP). In a Type 2A terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), the terminal has at least a sensing interval T short_dl A transmission can be sent immediately after the channel is sensed as idle within 25us. Here, T short_dl Section Tf (=16 us), and one subsequent sensing slot interval immediately following it. In a type 2A terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), T f includes a sensing slot at the start point of the interval. In a type 2B terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), the terminal senses the channel during the sensing interval T f = 16 us and can transmit immediately after the channel is sensed as idle. In a type 2B terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), T f includes a sensing slot within the last 9 us of the interval. In a type 2C terminal-to-base station (e.g., UL) channel access procedure (e.g., CAP), the terminal does not sense the channel before transmitting.

[0171] For example, according to type 1 LBT-based NR-U operation, a terminal having uplink data to transmit can select a CAPC mapped to the 5QI of the data, and the terminal can apply the parameters of the corresponding CACP (e.g., minimum contention window size, maximum contention window size, m p etc.) to perform NR-U operation. For example, the terminal can select a random value between the minimum CW and the maximum CW mapped to the CAPC and then select a BC (Backoff Counter). In that case, for example, BC can be a positive integer smaller than or equal to the random value. A terminal that has sensed the channel decreases BC by 1 if the channel is idle. If BC becomes zero and the terminal detects that the channel is idle for T d (T d = T f + m p * T sl ) time, the terminal can occupy the channel and attempt to transmit data. For example, Tsl (=9usec) is a basic sensing unit or sensing slot and can include a measurement duration of at least 4usec. For example, T f The 9 usec before (=16 usec) is T sl It can be composed of these.

[0172] For example, according to Type 2 LBT-based NR-U operation, a terminal can perform data transmission by running Type 2 LBT (e.g., Type 2A LBT, Type 2B LBT, Type 2C LBT) within the COT.

[0173] For example, Type 2A (also known as Cat-2 LBT (one-shot LBT) or one-shot LBT) is a 25-usec one-shot LBT. In this case, transmission can be initiated immediately after idle sensing for at least a 25-usec gap. Type 2A can be used to initiate SSB and non-unicast base station-to-terminal (e.g., DL) information transmissions. That is, a terminal can sense a channel for 25 usec within the COT, and when the channel is idle, it can occupy the channel and attempt to transmit data.

[0174] For example, Type 2B could be a 16usec one-shot LBT. In that case, transmission can start immediately after idle sensing of the 16usec gap. That is, the terminal can sense the channel for 16usec within the COT, and if the channel is idle, the terminal can occupy the channel and attempt to transmit data.

[0175] For example, in the case of Type 2C (also called Cat-1 LBT or No LBT), LTB may not be performed. In that case, transmission can begin after a gap of up to 16 usec, and the channel may not be sensed before the transmission. The duration of the transmission can be up to 584 usec. The terminal can attempt to transmit after 16 usec without sensing, and the terminal can perform the transmission for up to 584 usec.

[0176] In the sidelink unlicensed band, terminals can perform LBT (Listen Before Talk) based channel access operations. Before connecting to a channel in the unlicensed band, a terminal needs to check whether the connection channel is idle (for example, a state where the terminal does not occupy the channel and can connect to the channel and transmit data) or busy (for example, a state where the channel is occupied and data transmission and reception operations are being performed on the channel; a terminal attempting channel access cannot transmit data when the channel is busy). In other words, the operation by which a terminal checks whether a channel is idle or busy can also be called CCA (Clear Channel Assessment), and a terminal can check whether a channel is idle or busy for the duration of the CCA period.

[0177] On the other hand, in the next-generation system, terminals may perform terminal-to-terminal (e.g., SL) transmission and / or reception operations in unlicensed bands. However, operations in unlicensed bands may be preceded by channel sensing operations (e.g., energy detection / measurement) on the channels to be used by the terminal before the terminal performs the transmission, depending on bandwidth regulations or requirements. The terminal may perform the transmission to the unlicensed band only if the channel sensing results determine that the channel or resource block (e.g., RB) set to be used is idle (e.g., the measured energy is below or less than a certain threshold). If the channel sensing results determine that the channel or resource block (e.g., RB) set to be used is busy (e.g., the measured energy is above or above a certain threshold), the terminal may cancel all or part of the transmission to the unlicensed band.

[0178] On the other hand, in operation in the unlicensed band, the channel sensing operation is omitted or simplified (the channel sensing interval is made relatively small) for a certain period of time after transmission for a specific time interval of the terminal, while after a certain period of time has elapsed after transmission, the normal channel sensing operation is performed before deciding whether or not to transmit.

[0179] On the other hand, in unlicensed transmissions, depending on regulations or requirements, the time interval and / or frequency occupancy size and / or power spectral density (PSD) of the signal / channel transmitted by the terminal may each exceed a certain level.

[0180] On the other hand, in unlicensed bands, in order to simplify channel sensing, information is provided via COT (channel occupancy time) interval information indicating that a channel secured through initial normal channel sensing will be occupied for a certain period of time. The length of the COT interval can be set to a different maximum value depending on the priority of the service or data packet or the channel access priority class (CAPC).

[0181] On the other hand, a base station can share the COT section it has secured via channel sensing in the form of base station-to-terminal control information (e.g., DCI) transmission, and the terminal can perform channel sensing type and / or circular prefix (e.g., CP) extension (i.e., CPE) specified (instructed) by the base station-to-terminal control information (e.g., DCI) received from the base station within the COT section. On the other hand, the terminal can again share the COT section it has secured via channel sensing with a base station that is the recipient of the terminal-to-base station (e.g., UL) transmission, and the relevant information can be provided via terminal-to-base station communication (e.g., UL communication) via terminal-to-base station control information (e.g., CG-UCI). In the above situation, the base station can perform simplified channel sensing within the COT section shared by the terminal.

[0182] On the other hand, in the case of terminal-to-terminal (e.g., SL) communication, there are situations such as Mode 1 random connection (e.g., RA) operation where a terminal receives instructions from the base station regarding the resources to use for terminal-to-terminal (e.g., SL) transmission via base station-to-terminal control information (e.g., DCI) or radio resource control (e.g., RRC) signaling, and there are operations such as Mode 2 random connection (e.g., RA) operation where terminal-to-terminal (e.g., SL) transmission and reception are performed via sensing operations between terminals without the support of a base station.

[0183] On the other hand, channel access type 1 can be used regardless of the COT (channel occupancy time) setting.

[0184] On the other hand, within the COT (channel occupancy time), a simplified channel access type 2 could be used before transmission.

[0185] According to one embodiment of the present disclosure, type 2A terminal-to-terminal (e.g., SL) channel access is a scheme such as type 2A base station-to-terminal (e.g., DL) and / or terminal-to-base station (e.g., UL) channel access, where a sensing interval of T_short_sl = 25us and a T_f = 16us interval immediately following the sensing interval are composed of a single sensing slot, and T_f is in a form that includes the sensing slot at its beginning. Basic idle determination can also be performed using a base station-to-terminal (e.g., DL) or terminal-to-base station (e.g., UL) scheme.

[0186] According to one embodiment of the present disclosure, type 2B terminal-to-terminal (e.g., SL) channel access is a scheme such as type 2B base station-to-terminal (e.g., DL) and / or terminal-to-base station (e.g., UL) channel access, with a sensing interval of T_f = 16us, where T_f includes a sensing slot in a terminating 9us interval. Basic idle determination can also be performed using a base station-to-terminal (e.g., DL) or terminal-to-base station (e.g., UL) scheme.

[0187] According to one embodiment of the present disclosure, Type 2C terminal-to-terminal (e.g., SL) channel access is a form of Type 2C base station-to-terminal (e.g., DL) and / or terminal-to-base station (e.g., UL) channel access in which channel sensing is not performed. Instead, the time interval for terminal-to-terminal (e.g., SL) transmission is up to 584us.

[0188] According to one embodiment of the present disclosure, a type 1 terminal-to-terminal (e.g., SL) channel access is a type 1 base station-to-terminal (e.g., DL) and / or terminal-to-base station (e.g., UL) channel access that i) derives a random integer value N based on the size of the contention window corresponding to the priority class; ii) reduces the counter value in units of T_sl if the channel sensing result for a defer duration of size T_d corresponding to the priority class is idle, and reduces it to N-1 if it is idle; and iii) if the value of the counter is 0, the terminal may occupy a set of resource blocks (e.g., RB) or a channel subject to channel sensing.

[0189] However, if a portion of the channel sensing results for the T_sl interval is determined to be busy, the counter value can be maintained and channel sensing can be continued until the channel sensing results for a delay interval of size T_d become idle. In the above, the delay interval of length T_d is a form in which m_p T_sls are continuously constructed after T_f = 16us, where m_p is a value determined by the priority class p, and is a time interval in which channel sensing is performed at T_sl = 9us.

[0190] According to one embodiment of the present disclosure, if a terminal has occupied a channel via a Type 1 inter-terminal (e.g., SL) channel access and no inter-terminal (e.g., SL) transmission is prepared for the terminal to send, the terminal may set a delay interval of length T_d and a sensing interval of length T_sl immediately before the inter-terminal (e.g., SL) transmission that is ready to be sent, and if both are idle, the terminal may immediately execute the inter-terminal (e.g., SL) transmission. If either of the two is busy, the terminal may perform a Type 1 inter-terminal (e.g., SL) channel access again.

[0191] For example, if inter-terminal (e.g., SL) transmission becomes difficult at the time channel sensing ends (for example, if the end of channel sensing occurs after the start of inter-terminal (e.g., SL) transmission), the terminal can re-select the inter-terminal (e.g., SL) transmission resource.

[0192] On the other hand, there are cases where two transmissions that start transmitting at the same time cannot recognize each other's transmissions, and a collision can occur if the channel sensing results are both judged as idle.

[0193] On the other hand, when randomly adjusting the start time via circular prefix (e.g., CP) extension and / or one or more start symbol puncturing, some channels may be judged as busy during channel sensing for each transmission, which can lead to problems where frequency division multiplexing (e.g., FDM) between different resources within the same resource block (e.g., RB) set is not supported.

[0194] On the other hand, in the case of inter-terminal (e.g., SL) mode 2 resource (re)selection, the problem of transmission resources overlapping for different transmissions is avoided or mitigated by reserved resources that were previously specified in the transmission.

[0195] For example, if a terminal selects a candidate value for a cyclic prefix extension (e.g., CPE) by CAPC, the CAPC value is the CAPC value for the inter-terminal (e.g., SL) channel to which the cyclic prefix extension (e.g., CPE) is applied.

[0196] For example, if a terminal selects a candidate value for a circular prefix extension (e.g., CPE) by CAPC, the CAPC value is the CAPC value referenced when performing a channel access procedure for an inter-terminal (e.g., SL) channel to which the circular prefix extension (e.g., CPE) is applied, and / or is different from the CAPC value for the inter-terminal (e.g., SL) channel. For example, the CAPC value is a representative CAPC value for the inter-terminal (e.g., SL) transmit burst to which the inter-terminal (e.g., SL) channel belongs. For example, the representative CAPC value for the inter-terminal (e.g., SL) transmit burst is selected only for physical channel transmits (e.g., PSCCH / PSSCH transmits).

[0197] For example, when a terminal pre-configures multiple candidates for circular prefix extensions (e.g., CPE) for a physical channel transmission (e.g., PSCCH / PSSCH transmission), the unit of such pre-configuration is an L1 priority and / or CAPC group. For example, the L1 priority and / or CAPC group may consist of consecutive L1 priority values ​​and / or CAPC values. For example, the L1 priority group and / or CAPC group may be pre-defined or pre-configured. For example, the sizes of the L1 priority group and / or CAPC group may differ from each other and / or have no overlapping identical values. This method is advantageous when setting a large number of candidate values ​​for circular prefix extensions (e.g., CPE) by priority group, while limiting the total number of candidates for each circular prefix extension (e.g., CPE).

[0198] According to one embodiment of the present disclosure, when multiple cyclic prefix extensions (e.g., CPEs) are configured for a physical channel transmission (e.g., PSCCH / PSSCH transmission), and / or when a resource reservation is transmitted for a terminal's physical channel transmission (e.g., PSCCH / PSSCH transmission), the terminal can decide differently whether to use a default cyclic prefix extension (e.g., CPE) and / or to select a cyclic prefix extension (e.g., CPE) value from among multiple cyclic prefix extension (e.g., CPE) candidates, depending on the transmit power for the physical channel (e.g., PSCCH / PSSCH).

[0199] For example, in the above, if the transmit power value is less than or equal to a (pre-set) threshold, a cyclic prefix extension (e.g., CPE) value can be selected from among several cyclic prefix extension (e.g., CPE) candidates, and / or if the transmit power value exceeds or equal to a (pre-set) threshold, a basic cyclic prefix extension (e.g., CPE) can be used.

[0200] For example, in the above, it can be (pre-configured) whether to use a basic cyclic prefix extension (e.g., CPE) and / or to select a cyclic prefix extension (e.g., CPE) value from among several cyclic prefix extension (e.g., CPE) candidates, depending on the range of the transmit power value.

[0201] According to one embodiment of the present disclosure, a random circular prefix extension (e.g., CPE) may be used for initial transmissions, and a basic circular prefix extension (e.g., CPE) may be used for physical channels (e.g., PSCCH / PSSCH) that are transmitted after reserved resources have been indicated via inter-terminal control information (e.g., SCI).

[0202] On the other hand, a base station (e.g., a gNB) can be configured to perform frequency division multiplexing (e.g., FDM) on the initial transmission to multiple terminals. For example, this operation is a base station implementation.

[0203] According to one embodiment of the present disclosure, the terminal may, by instruction / setting by the base station, randomly select from (pre-configured) candidate values ​​for the starting position of a circular prefix extension (e.g., CPE) for a physical channel transmission (e.g., PSCCH / PSSCH transmission) (by priority or CAPC), or use a (pre-configured) starting position value for a basic circular prefix extension (e.g., CPE).

[0204] According to one embodiment of the present disclosure, when a physical channel transmission (e.g., PSCCH / PSSCH transmission) resource is indicated as base station-to-terminal control information (e.g., DCI) and / or a dynamic grant (e.g., dynamic grant (DG)), the circular prefix extension (e.g., CPE) selection method can be indicated as base station-to-terminal control information (e.g., DCI).

[0205] For example, if a physical channel transmit (e.g., PSCCH / PSSCH transmit) resource is set to radio resource control (e.g., RRC) and / or a configured grant (e.g., configured grant (CG)), the circular prefix extension (e.g., CPE) selection method can be set to radio resource control (e.g., RRC).

[0206] According to one embodiment of the present disclosure, the physical channel transmission (e.g., PSCCH / PSSCH transmission) can be limited to the first resource in time from among the physical channels (e.g., PSCCH / PSSCH) indicated by the base station-to-terminal control information (e.g., DCI).

[0207] For example, the PSSCH / PSSCH transmission can be limited to the first resource of each cycle in the case of a configured grant (e.g., configured grant (CG)).

[0208] For example, the physical channel transmission (e.g., PSCCH / PSSCH transmission) is a resource for each physical channel (e.g., PSCCH / PSSCH) indicated by base station-to-terminal control information (e.g., DCI), and / or the method of selecting each cyclic prefix extension (e.g., CPE) may be the same for all, or may be indicated differently for each physical channel (e.g., PSCCH / PSSCH).

[0209] For example, the physical channel transmission (e.g., PSCCH / PSSCH transmission) can be instructed to specify each physical channel (e.g., PSCCH / PSSCH) resource within a period for a configured grant (e.g., configured grant (CG)), and / or the method of selecting each cyclic prefix extension (e.g., CPE) can be the same for all, or different for each physical channel (e.g., PSCCH / PSSCH). For example, the physical channel transmission (e.g., PSCCH / PSSCH transmission) can also be instructed / configured to specify / configure different methods of selecting cyclic prefix extensions (e.g., CPE) for each period for a configured grant (e.g., configured grant (CG)).

[0210] For example, if a physical channel transmit (e.g., PSCCH / PSSCH transmit) resource corresponds to a configured grant (e.g., configured grant (CG)) resource, the starting position of the basic circular prefix extension (e.g., CPE) can be used.

[0211] For example, the physical channel transmission (e.g., PSCCH / PSSCH transmission) resources for the configured grant (e.g., configured grant (CG)) can be limited to using only some physical resource blocks (e.g., PRB) within a set of resource blocks (e.g., RB). That is, for example, if all physical resource blocks (e.g., PRB) are to be used for a set of resource blocks (e.g., RB), a method can be used to randomly select the starting position of the circular prefix extension (e.g., CPE).

[0212] For example, among dynamic grants (e.g., DGs), a retransmission dynamic grant (e.g., DG) for a configured grant (e.g., CG) may again use the starting position of the basic circular prefix extension (e.g., CPE).

[0213] According to one embodiment of the present disclosure, a terminal that has received a scheduling of terminal-to-terminal (e.g., SL) resources for an unlicensed band or shared spectrum from a base station via a terminal-to-terminal (e.g., SL) dynamic grant (e.g., DG) and / or a terminal-to-terminal established grant (e.g., SL CG) may indicate a non-zero value as the resource reservation period value when transmitting a physical channel (e.g., PSCCH / PSSCH) using the said resources. For example, the resource reservation period indication value is, in the case of a terminal-to-terminal established grant (e.g., SL CG), the resource period value for the terminal-to-terminal established grant (e.g., SL CG), or a value derived therefrom.

[0214] According to one embodiment of the present disclosure, when a resource is (re)selected, the terminal can deprioritize potential reserved resources corresponding to non-monitored slots and / or resources for a reference channel sensing interval for said potential reserved resources from the set of available resources, and / or deprioritize them when selecting a transmit resource, wherein the reference channel sensing interval is a value (pre-set) for a specific CAPC value. For example, the CAPC value for the non-monitored slot is the minimum CAPC value and / or the maximum CAPC value and / or a separately (pre-set) value.

[0215] According to one embodiment of the present disclosure, a terminal can select a Type 2 series channel access type from 2A, 2B, and 2C based on the time difference between the transmission from the COT initialization terminal and the transmission from the current terminal for transmission (via COT sharing).

[0216] For example, in this case, the time gap can be determined at the receiving terminal based on the received and detected (L1) ID.

[0217] And / or, for example, the time gap may be determined based on previously received reserved resource information (resource location and (L1)ID) and / or on the determination of whether an actual transmission occurred at the actual reserved resource location.

[0218] For example, transmission from the COT initialization terminal can be determined based on the (L1) source ID and / or destination ID for data on a physical channel (e.g., PSCCH / PSSCH) containing COT shared information.

[0219] And / or, for example, transmissions from the COT initialization terminal may be determined based on additional IDs included in the COT shared information.

[0220] According to one embodiment of the present disclosure, when multiple consecutive slot transmissions (e.g., MCSt (multi-consecutive slot transmission)) are generated for the (same) TB, the terminal can select the next candidate slot resources when (re)selecting resources, such that the HARQ RTT constraint is satisfied between consecutive resource groups, i.e., from the end of the last slot in the resource group for the previously selected candidate slot resources.

[0221] And / or, for example, if resource (re)selection is performed by substituting a candidate single-slot resource for a candidate multi-slot resource, the terminal may select the next candidate multi-slot resource during resource (re)selection such that the HARQ RTT constraint is satisfied between consecutive resource groups, i.e., from the end of the last slot in the resource group for the previously selected candidate multi-slot resource.

[0222] And / or, for example, if a physical feedback channel (e.g., PSFCH) resource between terminals is configured in the transmit resource pool, a terminal may, when (re)selecting a resource, select the next candidate slot resource between consecutive resource groups, i.e., from the end of the last slot in the resource group for the previously selected candidate slot resource, such that the HARQ RTT constraint is satisfied.

[0223] And / or, for example, if an inter-terminal (e.g., SL) grant for resource (re)selection is enabled for inter-terminal feedback (e.g., SL HARQ-ACK feedback), then when a terminal (re)selects a resource, it may select the next candidate slot resource in a sequence of resource groups, i.e., from the end of the last slot in the resource group for the previously selected candidate slot resource, such that the HARQ RTT constraint is satisfied.

[0224] In terminal-to-terminal communication (e.g., SL communication) operating in an unlicensed band, all or part of the following operations may be supported.

[0225] According to one embodiment of the present disclosure, in adjacent resource block (e.g., RB) based transmission, a candidate single slot resource, from which the lowest subchannels including intracell guard band physical resource blocks (e.g., PRBs) have been excluded, can be excluded from the initial set S_A in step 4 of the resource selection procedure.

[0226] For example, in receiving synchronization signal blocks (e.g., S-SSB) between terminals in one or more resource block (e.g., RB) sets, alternative 1 below can be supported.

[0227] Alternative 1: The power on the anchor resource block (e.g., RB) set for at least inter-terminal synchronization signal block (e.g., S-SSB) transmission remains constant due to the number of resource block (e.g., RB) sets used.

[0228] Here, for example, a terminal can allocate transmission power to an inter-terminal synchronization signal block (e.g., S-SSB) transmission on an anchor resource block (e.g., RB) set, and the remaining power can then be uniformly distributed to inter-terminal synchronization signal block (e.g., S-SSB) transmissions on other resource block (e.g., RB) sets.

[0229] For example, for a resource block (e.g., RB) set other than an anchor resource block (e.g., RB) set, the terminal can perform non-uniform power allocation for a terminal - to - terminal synchronization signal block (e.g., S - SSB), and / or in such a case, the selection can follow the implementation of the terminal. <"0000897">

[0230] According to an embodiment of the present disclosure, to avoid COT collisions, if neither the COT - start terminal nor the response terminal transmits a signal such as a terminal - to - terminal physical feedback channel (e.g., PSFCH) on a terminal - to - terminal physical feedback channel (e.g., PSFCH) transmission opportunity(ies) within the COT, the following Option 2 can be supported. <0000****>

[0231] Option 2: The COT - start terminal or the response terminal can transmit a signal such as a terminal - to - terminal physical feedback channel (e.g., PSFCH) on such a terminal - to - terminal physical feedback channel (e.g., PSFCH) transmission opportunity(ies).

[0232] Here, for example, resources not used for actual control information signaling (e.g., physical resource blocks (e.g., PRB) outside a terminal - to - terminal physical feedback channel (e.g., PSFCH) resource set, terminal - to - terminal physical feedback channel (e.g., PSFCH) resources associated with a transmitted terminal - to - terminal physical shared channel (e.g., PSSCH), common interleaves) can be used.

[0233] Here, for example, the sequence mapped to a signal such as the terminal - to - terminal physical feedback channel (e.g., PSFCH) can follow the implementation of the terminal.

[0234] According to an embodiment of the present disclosure, on a terminal - to - terminal physical feedback channel (e.g., PSFCH) on a common interleave, a single common interleave can be (pre -) set separately for each resource pool.

[0235] Here, for example, for multiple inter-terminal physical feedback channel (e.g., PSFCH) transmissions having the same or different minimum inter-terminal physical shared channel-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) timings, the terminals can use a single common interlace.

[0236] For example, implicit inter-terminal physical sharing channel-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) resource determination can be used to determine an anchor-dedicated physical resource block (e.g., PRB).

[0237] Here, for example, a terminal can select K3-1 dedicated physical resource blocks (e.g., PRBs) from a contiguous sequence of dedicated physical resource blocks (e.g., PRBs) belonging to the same interlace.

[0238] According to one embodiment of the present disclosure, in an inter-terminal physical feedback channel (e.g., PSFCH) over a dedicated interlace, implicit inter-terminal physical shared channel-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) resource determination can be used to determine an anchor dedicated physical resource block (e.g., PRB).

[0239] Here, for example, the terminal can select a dedicated interlace that includes a dedicated physical resource block (e.g., PRB) for the anchor.

[0240] According to one embodiment of the present disclosure, for implicit inter-terminal physical shared channel-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) resource determination for selecting an anchor-dedicated physical resource block (e.g., PRB), one of the following can be performed:

[0241] Alternative 1:

[0242] For example, a set of resource blocks (e.g., RBs) for an inter-terminal physical feedback channel (e.g., PSFCH) can be selected based on the set of resource blocks (e.g., RBs) occupied by the corresponding inter-terminal physical sharing channel (e.g., PSSCH).

[0243] For example, for each selected set of resource blocks (e.g., RBs), a terminal-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) determination rule can be applied to determine the subgroup of terminal-to-terminal physical feedback channel physical resource blocks (e.g., PSFCH PRBs) based on the subchannel index and slot index of the terminal-to-terminal physical shared channel (e.g., PSSCH).

[0244] For example, within a selected inter-terminal physical feedback channel (e.g., PSFCH-to-PSFCH) subgroup (e.g., PSFCH-PRB), an inter-terminal physical shared channel-to-terminal physical feedback channel (e.g., PSSCH-to-PSFCH) determination rule can be applied to determine the anchor-dedicated physical resource block (e.g., PRB) and cyclic shift pairs based on the L1 source ID and / or M_ID.

[0245] Alternative 2:

[0246] For example, among a group of (pre)configured physical resource blocks (e.g., PRBs) within a set of (pre)configured resource blocks (e.g., RBs) for inter-terminal physical feedback channel (e.g., PSFCH) transmission, the inter-terminal physical feedback channel physical resource block (e.g., PSFCH PRB) group can be divided into multiple resource block (e.g., RB) sets * subchannels * inter-terminal physical feedback channel (e.g., PSFCH) periods.

[0247] For example, subgroup indexing of inter-terminal physical feedback channel physical resource blocks (e.g., PSFCH PRB) can be performed in ascending order of slot index, subchannel index, and resource block (e.g., RB) set index.

[0248] For example, within a subset of inter-terminal physical feedback channel (e.g., PSFCH) resources, a terminal can select anchor-dedicated physical resource blocks (e.g., PRBs) and cyclic shift pairs based on the L1 source ID and / or M_ID.

[0249] For example, a terminal may use the lowest-level resource block (e.g., RB) set selected for terminal-to-terminal physical feedback channel (e.g., PSFCH) transmission, or all or part of the selected resource block (e.g., RB) set.

[0250] In embodiments of the present disclosure, the method in which an anchor-dedicated physical resource block (e.g., PRB) is selected and the remaining dedicated physical resource blocks (e.g., PRBs) and / or dedicated interlaces are determined based on this can also be expressed as being extended / modified to a method in which, conversely, a dedicated interlace is determined and the dedicated physical resource blocks (e.g., PRB(s)) are determined based on this.

[0251] For example, the set of (pre-configured) inter-terminal physical feedback channel physical resource blocks (e.g., PSFCH PRB) and resource block (e.g., RB) sets can be limited to anchor-dedicated physical resource block (e.g., PRB) selection, and / or (the remaining) dedicated physical resource blocks (e.g., PRB) can also be selected from within the (pre-configured) physical resource block (e.g., PRB) group.

[0252] For example, when the remaining dedicated physical resource blocks (e.g., PRBs) are derived from the anchor dedicated physical resource block (e.g., PRB), from the set of physical resource blocks (e.g., PRBs) of the interlace to which the anchor dedicated physical resource block (e.g., PRB) belongs, the next physical resource block (e.g., PRB) after the anchor dedicated physical resource block (e.g., PRB), or among those belonging to the inter-terminal physical feedback channel physical resource block (e.g., PSFCH PRB) group, the next physical resource block (e.g., PRB) can be selected.

[0253] For example, when the remaining dedicated physical resource blocks (e.g., PRBs) are derived from the anchor dedicated physical resource block (e.g., PRB), from the set of physical resource blocks (e.g., PRBs) of the interlace to which the anchor dedicated physical resource block (e.g., PRB) belongs, the physical resource block (e.g., PRB) after the (pre-set) gap from the anchor dedicated physical resource block (e.g., PRB), or the next physical resource block (e.g., PRB) belonging to the inter-terminal physical feedback channel physical resource block (e.g., PSFCH PRB) group after the (pre-set) gap can be selected.

[0254] According to an embodiment of the present disclosure, since the resource block (e.g., RB) set can include different numbers of physical resource blocks (e.g., PRBs), the values of the gap and N need to be (pre-set) separately for each resource block (e.g., RB) set.

[0255] For example, in the repetition(s) of the inter-terminal synchronization signal block (e.g., S-SSB) for each resource block (e.g., RB) set to meet the OCB requirements, the value of N can be (pre-set) separately for each resource block (e.g., RB) set among 1 to 8, and the value of the gap can be (pre-set) separately for each resource block (e.g., RB) set among 0 to 66.

[0256] In the foregoing, the values ​​of each parameter are merely examples, and some of these values ​​may be selected as candidates for the values.

[0257] On the other hand, in mode 1 operation, when dynamic inter-terminal (e.g., SL) resource allocation and / or established grant (e.g., CG) type 2 activation is performed via base station-to-terminal control information (e.g., DCI), the time interval between the time of reception of the base station-to-terminal control information (e.g., DCI) or the last symbol and / or the last symbol of the control resource set (e.g., CORESET) to which the base station-to-terminal physical control channel (e.g., PDCCH) containing the base station-to-terminal control information (e.g., DCI) is mapped, and the start position (including the circular prefix (e.g., CP) of the (allocated first) inter-terminal (e.g., SL) transmission, can be determined by the specific terminal processing time (UE processing time).

[0258] According to one embodiment of the present disclosure, the following features can be applied to the terminal processing time.

[0259] For example, in the activation of a terminal-to-terminal dynamic grant (e.g., SL DG) and a terminal-to-terminal configured grant (e.g., SL CG) type 2, if the first terminal-to-terminal communication (e.g., SL communication) assignment for a terminal-to-terminal physical shared channel (e.g., PSSCH) and associated terminal-to-terminal physical control channel (e.g., PSCCH) for a transmit block, defined by the slot offset K_SL of the scheduling base station-to-terminal control information (e.g., DCI) for the dynamic grant or the activation base station-to-terminal control information (e.g., DCI) for a terminal-to-terminal configured grant (e.g., CG) type 2, and including a demodulated reference signal (e.g., DM-RS) and a duplicated symbol, the terminal must transmit the terminal-to-terminal physical shared channel (e.g., PSSCH) and associated terminal-to-terminal physical control channel (e.g., PSCCH), defined by the slot offset K_SL of the scheduling base station-to-terminal control information (e.g., DCI) for the dynamic grant or the activation base station-to-terminal control information (e.g., DCI) for the terminal-to-terminal configured grant (e.g., CG) type 2, and including a demodulated reference signal (e.g., DM-RS) and a duplicated symbol, then the terminal must transmit the terminal-to-terminal physical shared channel (e.g., PSSCH) and associated terminal-to-terminal physical control channel (e.g., PSCCH).

[0260] Here, for example, the above L is the base station-to-terminal physical control channel (e.g., PDCCH) that transmits the base station-to-terminal control information (e.g., DCI) for scheduling inter-terminal transmission (e.g., SL transmission) for dynamic grants or the base station-to-terminal control information (e.g., DCI) for activating the inter-terminal configured grant (e.g., SL CG) type 2, from the end of reception of the last symbol of the base station-to-terminal physical control channel (e.g., PDCCH), T proc =(N2 + d 2、1 )(2048 + 144)·κ2 -μ ·T C +T ext It can be defined as the next inter-terminal (e.g., SL) symbol starting from the start of the cyclic prefix after about that much.

[0261] Here, for example, N2 can be determined based on μ in Table 7. Here, for example, μ is the base station-to-terminal physical control channel (e.g., PDCCH) that transmits the base station-to-terminal control information (e.g., DCI) for scheduling inter-terminal transmission (e.g., SL transmission) for dynamic grants or the base station-to-terminal control information (e.g., DCI) for activating the inter-terminal configured grant (e.g., SL CG) type 2, and can correspond to the subcarrier spacing of the base station-to-terminal communication where the base station-to-terminal physical control channel (e.g., PDCCH) is transmitted, and μ proc makes the largest (μ DL , μ SL ). Here, μ DL corresponds to the subcarrier spacing of the base station-to-terminal physical control channel (e.g., PDCCH) that transmits the base station-to-terminal control information (e.g., DCI) for scheduling inter-terminal transmission (e.g., SL transmission) for dynamic grants or the base station-to-terminal control information (e.g., DCI) for activating the inter-terminal configured grant (e.g., SL CG) type 2, and μ SL can correspond to the subcarrier spacing of the inter-terminal channel (e.g., SL channel) where the inter-terminal physical shared channel (e.g., PSSCH) and the related inter-terminal physical control channel (e.g., PSCCH) are transmitted.

[0262] For example, in the operation of shared spectrum channel access in FR1, T ext can be calculated by the following parameters and Table 8. For example, the index i of C i and Δi is μ SLWhen it is 0, it is set to "1", μ SL When it is 1, it is set to "3", μ SL When it is 2, it can be set to "2". In other cases, T ext It is 0. For example, d 2、1 It is 1.

[0263] In other cases, for example, a terminal may ignore base station-to-terminal control information (e.g., DCI) for scheduling terminal-to-terminal transmissions (e.g., SL transmissions) for dynamic grants or base station-to-terminal control information (e.g., DCI) for activating terminal-to-terminal configured grants (e.g., SL CG) type 2.

[0264] For example, T proc The value can be used for both general and extended cyclic prefixes.

[0265] [Table 7]

[0266] According to one embodiment of the present disclosure, in terminal-to-terminal (e.g., SL) resource allocation mode 1, the terminal does not expect the first terminal-to-terminal (e.g., SL) symbol in the terminal-to-terminal (e.g., SL) allocation for the terminal-to-terminal physical shared channel (e.g., PSSCH) and associated terminal-to-terminal physical control channel (e.g., PSCCH) for the retransmission of a transmit block, defined by the "Time Resource Allocation" field of the applicable base station-to-terminal control information (e.g., DCI) for the dynamic grant or terminal-to-terminal (e.g., SL)-configured grant type 2, which includes a demodulated reference signal (e.g., DM-RS) and a duplicated symbol, or by sl-TimeResourceCG-Type1 for the configured grant type 1, to start earlier than symbol L.

[0267] Here, for example, L is from the end of the last symbol of an inter-terminal physical feedback channel (e.g., PSFCH) opportunity corresponding to the most recent inter-terminal physical shared channel (e.g., PSSCH) transmission for the same transmission block to T prep +δ can be defined as the next terminal-to-terminal (e.g., SL) symbol following the start of a cyclic prefix. For example, δ is 5·10 -4 In other cases, the terminal may omit the retransmission of the inter-terminal physical shared channel (e.g., PSSCH) and the associated inter-terminal physical control channel (e.g., PSCCH).

[0268] [Table 8]

[0269] On the other hand, if a cyclic prefix extension (e.g., CPE) is added to an inter-terminal (e.g., SL) transmission, the UE processing time needs to be extended accordingly. However, the starting position of the cyclic prefix extension (e.g., CPE) in inter-terminal communication (e.g., SL communication) can be determined by the terminal, and / or the base station does not know this information precisely.

[0270] For example, the duration of the terminal processing time can be further extended by about 1 OFDM symbol length. For example, the duration of the terminal processing time can be further extended by about 2 OFDM symbol lengths (at least when the subcarrier interval (e.g., SCS) is 30 kHz and / or 60 kHz).

[0271] For example, the duration of the terminal processing time is longer if it corresponds to the longest of the (pre-configured) cyclic prefix extension (e.g., CPE) lengths or the starting positions of the cyclic prefix extension (e.g., CPE). For example, the longest cyclic prefix extension (e.g., CPE) length is determined from among the candidate values ​​for cyclic prefix extensions (e.g., CPE) during COT initialization or external access and / or during COT sharing or internal access.

[0272] For example, the duration of the terminal processing time can be determined to be the longest duration among the durations determined based on candidate values ​​for cyclic prefix extension (e.g., CPE). Here, for example, the candidate values ​​for cyclic prefix extension (e.g., CPE) can be determined differently, such as by the subcarrier interval.

[0273] Figure 14 shows a procedure in which a device determines whether or not to perform inter-terminal transmission (e.g., SL transmission) based on terminal processing time, according to one embodiment of the present disclosure. The embodiment in Figure 14 can be combined with various embodiments of the present disclosure.

[0274] Referring to Figure 14, a base station and the first device are disclosed, to which the first device allocates resources for performing terminal-to-terminal transmission (e.g., SL transmission).

[0275] In step S1410, the base station may transmit resource allocation information to the first device. For example, the resource allocation information may include information for a second resource for inter-terminal transmission (e.g., SL transmission). For example, the resource allocation information may be received by the first resource.

[0276] In step S1420, the first device can decide whether to perform an inter-terminal transmission (e.g., SL transmission) based on the time of reception of the first resource, the time of reception of the second resource, and the terminal processing time.

[0277] For example, as in (a), if the time interval between the end of the first resource (e.g., the last symbol) and the start of the second resource (e.g., the first symbol) is longer than the terminal processing time, the first device may decide to perform the inter-terminal transmission (e.g., SL transmission).

[0278] For example, as in (b), if the time interval between the end of the first resource (e.g., the last symbol) and the start of the second resource (e.g., the first symbol) is shorter than the terminal processing time, the first device may decide not to perform the inter-terminal transmission (e.g., SL transmission).

[0279] Figure 15 shows a method for determining the longest extension time by numerology according to one embodiment of the present disclosure. The embodiment in Figure 15 can be combined with various embodiments of the present disclosure.

[0280] Referring to Figure 15, the first symbol before the application of the circular prefix extension by each subcarrier interval (e.g., SCS) (μ) is disclosed for the transmit resource, and the time interval that is extended when the circular prefix is ​​applied.

[0281] After the circular prefix extension is applied, the starting point of a resource is determined symbolically from the first symbol of the resource before the circular prefix extension was applied (for example, from the resource time point before the circular prefix was applied to C i The symbol indicates an earlier point in time, and a specific time length (Δ) from that point in time. i ) can be determined at a later point in time. Here, the length of the time interval from the start of the resource after the application of the cyclic prefix extension to the first symbol of the resource before the application of the cyclic prefix extension (extension time in Figure 15) can mean the cyclic prefix extension length described herein. Here, i can mean a (pre)defined cyclic prefix index.

[0282] For example, referring to Table 8, when μ is 0, the maximum C when the cyclic prefix is ​​applied. i Since is 1, from the resource point before the application of the circular prefix, one symbol prior, in this case the minimum allowable Δ i (16.10 -6 s) The time point after this can be the time point of the resource to which the circular prefix extension was applied. The time interval from the time point of the resource to which the circular prefix extension was applied to the time point of the resource before the circular prefix extension was applied can be the extension time, and this extension time can be included in the terminal processing time. In this case, i is 1.

[0283] For example, referring to Table 8, when μ is 1, the maximum C when the cyclic prefix is ​​applied. i Since it is 2, from a point in time 2 symbols prior to the resource point before applying the circular prefix, in this case the minimum allowable Δ i (16.10 -6 s) The time point after this can be the time point of the resource to which the circular prefix extension was applied. The time interval from the time point of the resource to which the circular prefix extension was applied to the time point of the resource before the circular prefix extension was applied can be the extension time, and this extension time can be included in the terminal processing time. In this case, i is 3.

[0284] For example, referring to Table 8, when μ is 2, the maximum C when the cyclic prefix is ​​applied. i Since it is 2, from a point in time 2 symbols prior to the resource point before applying the circular prefix, in this case the minimum allowable Δ i (16.10 -6 s) The time point after this can be the time point of the resource to which the circular prefix extension was applied. The time interval from the time point of the resource to which the circular prefix extension was applied to the time point of the resource before the circular prefix extension was applied can be the extension time, and this extension time can be included in the terminal processing time. In this case, i is 2.

[0285] On the other hand, if a cyclic prefix extension (e.g., CPE) scheme is semi-statically determined (to a random selection scheme) for a set grant (e.g., CG), then the gNB may later need to allocate inter-terminal (e.g., SL) resources that have been frequency-division multiplexed (e.g., FDM) via a dynamic grant (e.g., DG).

[0286] In this case, for example, the selection scheme for circular prefix extensions (e.g., CPE) to grant (e.g., CG) and / or dynamic grant (e.g., DG) inter-terminal (e.g., SL) transmission resources can be updated via control information (e.g., DCI) of a third base station-to-terminal to be overwritten.

[0287] According to one embodiment of the present disclosure, a terminal can report to a base station (e.g., gNB) whether or not the circular prefix extension (e.g., CPE) selection scheme can be changed and / or related matters.

[0288] For example, in the case of wireless resource control (e.g., RRC) settings, the application can differ depending on whether it is a full resource block (e.g., RB) set or a partial resource block (e.g., RB) set. Alternatively, for example, the cyclic prefix extension (e.g., CPE) selection method differs depending on whether it is a full resource block (e.g., RB) set or a partial resource block (e.g., RB) set, regardless of wireless resource control (e.g., RRC) settings. For example, in full resource block (e.g., RB) set assignment, the cyclic prefix extension (e.g., CPE) can be selected randomly, while in partial resource block (e.g., RB) set assignment, the basic cyclic prefix extension (e.g., CPE) can be used.

[0289] In various embodiments of this disclosure, a full resource block (e.g., RB) set allocation can mean using all physical resource blocks (e.g., PRBs) within a resource block (e.g., RB) set for transmission, either in whole or in part, of the allocated resource block (e.g., RB) set.

[0290] In various embodiments of this disclosure, partial resource block (e.g., RB) set allocation can mean using some physical resource blocks (e.g., PRB) within a resource block (e.g., RB) set for transmission to all or part of an allocated resource block (e.g., RB) set.

[0291] In various embodiments of this disclosure, the allocation-specific (pre-)configuration of partial resource block (e.g., RB) sets is again performed and / or differs from the number (range) of physical resource blocks (e.g., PRBs) allocated within a resource block (e.g., RB) set and / or the ratio (range) of allocated physical resource blocks (e.g., PRBs) to the total number of physical resource blocks (e.g., PRBs).

[0292] In various embodiments of this disclosure, transmissions using Type 2 channel access may represent transmissions within a COT interval, and / or transmissions using Type 1 channel access may represent transmissions outside the COT or transmissions during COT initialization.

[0293] In various embodiments of this disclosure, various methods can be applied differently depending on the CAPC value, and / or the inter-terminal (e.g., SL) priority value, and / or the (residual) counter value of the type 1 channel access procedure, and / or the size of the contention window of the type 1 channel access procedure.

[0294] The various embodiments of this disclosure can be applied differently depending on the inter-terminal (e.g., SL) resource selection method and operation method (e.g., Mode 1 operation or Mode 2 operation), or the terminal coverage state (e.g., INC (in-coverage) or OOC (out-of-coverage)).

[0295] The schemes described in the various embodiments of this disclosure can be applied differently depending on the inter-terminal (e.g., SL) channel and / or whether the physical channel transmission (e.g., PSCCH / PSSCH transmission) is performed outside or inside the COT.

[0296] The methods described in the various embodiments of this disclosure can be applied differently depending on the SCS, and / or the set of resource blocks (e.g., RBs), and / or the size of the set of resource blocks (e.g., RBs).

[0297] In various embodiments of this disclosure, transmissions located outside the COT can be interpreted as transmissions used during COT initialization and / or transmissions based on Type 1 channel access procedures.

[0298] Embodiments of this disclosure are provided for each resource pool, and / or for transmissions outside and / or inside the resource pool, and / or for each QoS parameter, and / or for each CAPC, and / or for each terminal-to-terminal (e.g., SL) priority, and / or for each internal or internal COT (during COT initialization), and / or for each transmission order within a series of consecutive slot transmissions (e.g., MCSt), and / or for each terminal-to-terminal (e.g., SL) channel type, and / or for each resource block (e.g., RB) set, and / or for each terminal-to-terminal partial bandwidth (e.g., SL BWP), and / or for each terminal-to-terminal (e.g., SL) carrier, and / or for each congestion control level, and / or for each transmit or receive operation, and / or for each transmit power level, and / or for each transmit initiation time, and / or for each channel access procedure type for the transmit, and / or for each LBT failure rate, and / or for each COT initiator UE, COT responded UE, or other UE, and / or for each cast type, and / or for each terminal feedback (e.g., SL The settings can be different and / or (pre-configured) depending on whether HARQ-ACK feedback is activated or not, and / or on the feedback (e.g., HARQ-ACK feedback) option, and / or on the number of transmission attempts for the same information or transmission block (e.g., TB).

[0299] For example, in embodiments of this disclosure, (pre)configuration is by resource pool, and / or by transmission outside the resource pool, and / or inside the resource pool, and / or by QoS parameter, and / or by CAPC, and / or by inter-terminal (e.g., SL) priority, and / or by COT internal or external (at COT initialization), and / or by transmission order within multiple consecutive slot transmissions (e.g., MCSt), and / or by inter-terminal (e.g., SL) channel type, and / or by resource block (e.g., RB) set, and / or by inter-terminal partial bandwidth (e.g., SL BWP), and / or by inter-terminal (e.g., SL) carrier, and / or by congestion control level, and / or by transmit operation or receive operation, and / or by transmit power level, and / or by transmit start time, and / or by channel access procedure type for transmit, and / or by LBT failure rate, and / or by whether it is a COT start UE, a COT response UE, or any other UE, and / or by cast type, and / or by inter-terminal feedback (e.g., SL This is performed based on whether HARQ-ACK feedback is activated or not, and / or based on the feedback (e.g., HARQ-ACK feedback) option, and / or based on the number of transmission attempts for the same information or transmission block (e.g., TB).

[0300] The method proposed above can be applied to the apparatus described below. First, the receiving terminal's processor 202 can set at least one partial bandwidth (e.g., BWP). Also, the receiving terminal's processor 202 can control the receiving terminal's transceiver 206 to receive the inter-terminal communication (e.g., SL communication) related physical channel and / or inter-terminal communication (e.g., SL communication) related reference signal from the transmitting terminal over at least one partial bandwidth (e.g., BWP).

[0301] On the other hand, in Mode 2 terminal-to-terminal communication (e.g., SL mode 2), the selection process for inter-terminal cyclic prefix extension (e.g., CPE) is performed based on sensing information received by the transmitting terminal. In contrast, in Mode 1 terminal-to-terminal communication (e.g., SL mode 1), the transmitting terminal does not perform sensing, and therefore, it is not appropriate to perform the same selection process for inter-terminal cyclic prefix extension (e.g., CPE) in Mode 2 terminal-to-terminal communication (e.g., SL mode 2) in Mode 1 terminal-to-terminal communication (e.g., SL mode 1). Furthermore, when calculating the inter-terminal physical shared channel (e.g., PSSCH) preparation time for Mode 1 terminal-to-terminal communication (e.g., SL mode 1), the base station cannot accurately know the actual cyclic prefix extension value (e.g., CPE value) of the terminal.

[0302] According to one embodiment of the present disclosure, a base station can instruct / configure the type of cyclic prefix extension (e.g., CPE) selection scheme for inter-terminal resources (e.g., SL resources). According to one embodiment of the present disclosure, when calculating the inter-terminal physical shared channel (e.g., PSSCH) preparation time, the longest cyclic prefix extension (e.g., CPE) length can be assumed.

[0303] According to various embodiments of this disclosure, by using numerology-optimized terminal processing time when circular prefix extensions are applied in the unlicensed band, delays associated with transmission operations can be reduced, and wireless communication can be performed smoothly even when circular prefix extensions are applied. Furthermore, when Mode 1 terminal-to-terminal communication is performed, the procedure for selecting values ​​associated with circular prefix extensions can be performed efficiently.

[0304] Figure 16 shows a procedure in which a first device performs wireless communication according to one embodiment of the present disclosure. The embodiment in Figure 16 can be combined with various embodiments of the present disclosure.

[0305] Referring to Figure 16, in step S1610, the first device can receive information from the base station regarding a second resource for performing an inter-device transmission, based on the first resource. In step S1620, the first device can decide to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. For example, the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest extension time among a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0306] For example, the multiple extension times, including the first extension time, can be determined based on the subcarrier interval associated with the inter-device transmission.

[0307] For example, the first device may additionally receive information from the base station regarding the method for determining the plurality of extended times.

[0308] For example, the method by which the multiple extension times are determined may include a method that uses a default cyclic prefix extension value or a method that is determined based on the subcarrier interval used.

[0309] For example, based on the transmission power associated with the inter-device transmission, it can be determined whether to use a basic cyclic prefix extension value to determine the multiple extension times.

[0310] For example, the basic cyclic prefix extension value can be used to determine the multiple extension times based on whether the transmission power is above a threshold.

[0311] For example, information regarding the second resource can be received as part of the control information of the base station-to-device.

[0312] For example, the control information of the base station-to-device can be received via the physical control channel of the base station-to-device.

[0313] For example, receiving information for the second resource is a dynamic resource allocation.

[0314] For example, the end point of the first resource is the last symbol point of the first resource.

[0315] For example, the first resource may be included in the control resource set.

[0316] For example, the first device may additionally perform channel sensing associated with a channel access procedure based on the start time of the second resource.

[0317] For example, the inter-device transmission can be performed based on the channel sensing result being idle (IDLE).

[0318] The embodiments described above can be applied to a variety of devices as described below. First, the processor 102 of the first device 100 can control the transceiver 106 to receive information from the base station 300 for a second resource to perform inter-device transmission, based on a first resource. The processor 102 of the first device 100 can also decide to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. For example, the device processing time includes a first extension time associated with cyclic prefix extension, and the first extension time is the longest extension time among a plurality of extension times associated with cyclic prefix extension that are permitted for the inter-device transmission.

[0319] According to one embodiment of the present disclosure, a first device for performing wireless communication can be provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and, based on being executed by the at least one processor, storing instructions for the first device to perform an operation. For example, the operation may include: receiving information from a base station for a second resource to perform an inter-device transmission based on a first resource; and deciding to perform the inter-device transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a device processing time; wherein the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0320] For example, the multiple extension times, including the first extension time, can be determined based on the subcarrier interval associated with the inter-device transmission.

[0321] For example, the operation may further include the step of receiving information from the base station regarding the scheme for which the plurality of extended times are determined.

[0322] For example, the method by which the multiple extension times are determined may include a method that uses a default cyclic prefix extension value or a method that is determined based on the subcarrier interval used.

[0323] For example, based on the transmission power associated with the inter-device transmission, it can be determined whether to use a basic cyclic prefix extension value to determine the multiple extension times.

[0324] For example, the basic cyclic prefix extension value can be used to determine the multiple extension times based on whether the transmission power is above a threshold.

[0325] For example, information regarding the second resource can be received as part of the control information of the base station-to-device.

[0326] For example, the control information of the base station-to-device can be received via the physical control channel of the base station-to-device.

[0327] For example, receiving information for the second resource is a dynamic resource allocation.

[0328] For example, the end point of the first resource is the last symbol point of the first resource.

[0329] For example, the first resource may be included in the control resource set.

[0330] For example, the operation may further include the step of performing channel sensing associated with a channel access procedure, based on the start time of the second resource.

[0331] For example, the inter-device transmission can be performed based on the channel sensing result being idle (IDLE).

[0332] According to one embodiment of the present disclosure, a device configured to control a first terminal can be provided. For example, the device may include: at least one processor; and at least one memory which can be executablely coupled to the at least one processor and which, based on being executed by the at least one processor, records instructions for the first terminal to perform an operation. For example, the operation may include: receiving information from a base station for a second resource to perform an inter-UE transmission based on a first resource; and deciding to perform the inter-UE transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a terminal processing time; wherein the terminal processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-UE transmission.

[0333] According to one embodiment of the present disclosure, a storage medium readable by a non-temporary computer recording an instruction can be provided. For example, the instruction, when executed, causes a first device to: receive information from a base station for a second resource to perform an inter-device transmission based on a first resource; and decide to perform the inter-device transmission based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to the device processing time, wherein the device processing time includes a first extension time associated with a cyclic prefix extension, and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0334] Figure 17 shows a procedure in which a second device performs wireless communication according to one embodiment of the present disclosure. The embodiment in Figure 17 can be combined with various embodiments of the present disclosure.

[0335] Referring to Figure 17, in step S1710, the second device can receive an inter-device transmission from the first device based on the second resource. For example, the inter-device transmission is determined to be performed based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to the device processing time, the first resource being the resource for which information regarding the second resource has been received from the base station to the first device, the device processing time including a first extension time associated with a cyclic prefix extension, and the first extension time being the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0336] For example, the end point of the first resource is the last symbol point of the first resource.

[0337] The embodiments described above can be applied to a variety of devices as described below. First, the processor 202 of the second device 200 can control the transceiver 206 to receive inter-device transmissions from the first device 100 based on a second resource. For example, the inter-device transmission is determined to be performed based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to the device processing time, the first resource being the resource from which information for the second resource has been received by the first device 100 from the base station 300, the device processing time including a first extension time associated with a cyclic prefix extension, and the first extension time being the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0338] According to one embodiment of the present disclosure, a second device for performing wireless communication can be provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and, based on being executed by the at least one processor, storing instructions for the second device to perform an operation. For example, the operation includes: receiving an inter-device transmission from a first device based on a second resource; the inter-device transmission is determined to be performed based on the time interval from the end of the first resource to the start of the second resource being greater than or equal to a device processing time, the first resource being a resource for which information regarding the second resource has been received from a base station to the first device; the device processing time includes a first extension time associated with a cyclic prefix extension; and the first extension time is the longest of a plurality of extension times associated with a cyclic prefix extension that are permitted for the inter-device transmission.

[0339] For example, the end point of the first resource is the last symbol point of the first resource.

[0340] Various embodiments of this disclosure can be combined with each other.

[0341] The following describes devices to which various embodiments of this disclosure apply.

[0342] Without limiting itself, the various descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this document can be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0343] The following provides more specific examples with reference to the drawings. In the following drawings and descriptions, unless otherwise specified, the same or corresponding hardware blocks, software blocks, or functional blocks can be illustrated by the same reference numerals in the same drawings.

[0344] Figure 18 shows a communication system 1 according to one embodiment of the present disclosure. The embodiment in Figure 18 can be combined with various embodiments of the present disclosure.

[0345] Referring to Figure 18, the communication system 1 to which various embodiments of this disclosure apply includes wireless equipment, base stations, and networks. Here, wireless equipment means equipment that performs communication using wireless connectivity technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as communication / wireless / 5G equipment. However, wireless equipment may include, without limitation, robots 100a, vehicles 100b-1, 100b-2, XR (eXtended Reality) equipment 100c, handheld devices 100d, home appliances 100e, IoT (Internet of Things) equipment 100f, and AI equipment / servers 400. For example, vehicles may include vehicles equipped with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing vehicle-to-vehicle communication. Here, vehicles can include UAVs (Unmanned Aerial Vehicles) (e.g., drones) and / or AVs (Aerial Vehicles) (e.g., AAMs (Advanced Air Mobility)). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices and can be embodied in the form of HMDs (Head-Mounted Devices), HUDs (Head-Up Displays) mounted on vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Portable devices can include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), computers (e.g., laptops, etc.). Home appliances can include TVs, refrigerators, washing machines, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be embodied by wireless devices, and specific wireless devices 200a can also operate as base stations / network nodes for other wireless devices.

[0346] Here, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. In this case, for example, NB-IoT technology is an example of LPWAN (Low Power Wide Area Network) technology and can be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the names mentioned above. Furthermore, or generally, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification can communicate based on LTE-M technology. In this case, for example, LTE-M technology is an example of LPWAN technology and is called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Furthermore, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification may include, or generally may not include, at least one of ZigBee, Bluetooth (registered trademark; hereinafter the same), and Low Power Wide Area Network (LPWAN), which take low-power communication into consideration. For example, Zigbee technology can generate personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and is known by various names.

[0347] Wireless devices 100a to 100f can be connected to the network 300 via the base station 200. Artificial Intelligence (AI) technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to the AI ​​server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Wireless devices 100a to 100f can communicate with each other via the base station 200 / network 300, but they can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Furthermore, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0348] Wireless communication / connection 150a, 150b, and 150c can be performed between wireless devices 100a-100f / base station 200 and between base stations 200 / base station 200. Here, wireless communication / connection can be performed via uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, IAB (Integrated Access Backhaul), or various other wireless connectivity technologies (e.g., 5G NR)). Wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals from each other via wireless communication / connection 150a, 150b, and 150c. For example, wireless communication / connection 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, at least some of the following can be performed based on the various proposals of this disclosure: various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0349] Figure 19 shows a wireless device according to one embodiment of the present disclosure. The embodiment in Figure 19 can be combined with various embodiments of the present disclosure.

[0350] Referring to Figure 19, the first radio device 100 and the second radio device 200 can transmit and receive radio signals via various radio connectivity technologies (e.g., LTE, NR). Here, {first radio device 100, second radio device 200} can correspond to {radio device 100x, base station 200} and / or {radio device 100x, radio device 100x} in Figure 18.

[0351] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceivers 106 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information / signals and then transmit a wireless signal containing the first information / signals via the transceiver 106. Alternatively, the processor 102 may receive a wireless signal containing second information / signals via the transceiver 106 and then store information obtained from signal processing of the second information / signals in the memory 104. The memory 104 may be linked to the processor 102 and may store various information related to the operation of the processor 102. For example, memory 104 may store software code that includes instructions for executing some or all of the processes controlled by processor 102, or for executing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Here, processor 102 and memory 104 are part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 106 may be coupled with processor 102 and may transmit and / or receive radio signals via one or more antennas 108. Transceiver 106 may include a transmitter and / or receiver. Transceiver 106 may be used in combination with an RF (Radio Frequency) unit. In this disclosure, wireless equipment may also mean a communication modem / circuit / chip.

[0352] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memories 204 and / or the transceivers 206 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signals and then transmit a wireless signal containing the third information / signals via the transceiver 206. Alternatively, the processor 202 may receive a wireless signal containing fourth information / signals via the transceiver 206 and then store information obtained from signal processing of the fourth information / signals in the memory 204. The memory 204 may be linked to the processor 202 and may store various information related to the operation of the processor 202. For example, memory 204 may store software code that includes instructions for executing some or all of the processes controlled by processor 202, or for executing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Here, processor 202 and memory 204 are part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 206 may be coupled with processor 202 and may transmit and / or receive radio signals via one or more antennas 208. Transceiver 206 may include a transmitter and / or receiver and may be used in combination with an RF unit. In this disclosure, wireless equipment may also mean a communication modem / circuit / chip.

[0353] The hardware elements of wireless devices 100 and 200 will be described in more detail below. However, one or more protocol layers can be embodied by one or more processors 102 and 202. For example, one or more processors 102 and 202 can embodied one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) by means of the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 can generate messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. One or more processors 102, 202 can generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data, or information by means of the functions, procedures, suggestions and / or methods disclosed in this document and provide them to one or more transceivers 106, 206. One or more processors 102, 202 can receive signals (e.g., baseband signals) from one or more transceivers 106, 206 and acquire PDUs, SDUs, messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document.

[0354] One or more processors 102, 202 are referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102, 202 can be embodied by hardware, firmware, software, or a combination thereof. For example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented by one or more processors 102, 202, or stored in one or more memories 104, 204 and driven by one or more processors 102, 202, with firmware or software configured to execute them. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and / or sets of instructions.

[0355] One or more memory units 104, 204 can be connected to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memory units 104, 204 can consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer read / store media, and / or combinations thereof. One or more memory units 104, 204 can be located inside and / or outside of one or more processors 102, 202. Furthermore, one or more memory units 104, 204 can be connected to one or more processors 102, 202 via various technologies such as wired or wireless connections.

[0356] One or more transceivers 106, 206 can transmit user data, control information, radio signals / channels, etc., as referred to in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106, 206 can be connected to one or more processors 102, 202 to transmit and receive radio signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or radio signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or radio signals from one or more other devices. Furthermore, one or more transceivers 106, 206 can be connected to one or more antennas 108, 208 and configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein, via one or more antennas 108, 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 can convert received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102, 202. One or more transceivers 106, 206 can convert user data, control information, radio signals / channels, etc., processed using one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 may include (analog) oscillators and / or filters.

[0357] Figure 20 shows a signal processing circuit for a transmitted signal according to one embodiment of the present disclosure. The embodiment in Figure 20 can be combined with various embodiments of the present disclosure.

[0358] Referring to Figure 20, 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. However, it is not limited to these, and the operation / function of Figure 20 can be performed by the processors 102, 202 and / or transceivers 106, 206 of Figure 19. The hardware elements of Figure 20 can be embodied by the processors 102, 202 and / or transceivers 106, 206 of Figure 19. For example, blocks 1010-1060 can be embodied by the processors 102, 202 of Figure 19. Also, blocks 1010-1050 can be embodied by the processors 102, 202 of Figure 19, and block 1060 can be embodied by the transceivers 106, 206 of Figure 19.

[0359] The codeword can be converted into a radio signal via the signal processing circuit 1000 in Figure 20. Here, the codeword is an encoded bit sequence of information blocks. The information blocks may include transmission blocks (e.g., UL-SCH transmission block, DL-SCH transmission block). The radio signal can be transmitted via various physical channels (e.g., PUSCH, PDSCH).

[0360] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambled sequence used for scrambling is generated based on an initialization value, which may include the ID information of the radio equipment. The scrambled bit sequence can be modulated into a modulated symbol sequence by the modulator 1020. The modulation scheme can include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulated symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulated symbol of each transmission layer can be mapped to the corresponding antenna port (ra) by the precoder 1040 (precoding). The output z of the precoder 1040 is obtained by multiplying the output y of the layer mapper 1030 by an N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT transformation) on the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0361] The resource mapper 1050 can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols in the time domain (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to other devices via each antenna. To this end, the signal generator 1060 may include an IFFT (Inverse Fast Fourier Transform) module, a CP (Cyclic Prefix) inserter, a DAC (Digital-to-Analog Converter), a frequency uplink converter, and the like.

[0362] In wireless equipment, the signal processing process for a received signal can be configured as the reverse of the signal processing processes 1010-1060 in Figure 20. For example, wireless equipment (e.g., 100, 200 in Figure 19) can receive wireless signals from an external source via an antenna port / transceiver. The received wireless signal can be converted into a baseband signal via a signal restorer. For this purpose, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Subsequently, the baseband signal can be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descramble process. The codeword can be restored to the original information block through decoding. Therefore, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource demapper, a postcoder, a demodulator, a descrambler, and a decoder.

[0363] Figure 21 shows a wireless device according to one embodiment of the present disclosure. The wireless device can be implemented in a variety of forms depending on the use-example / service (see Figure 18). The embodiment in Figure 21 can be combined with various embodiments of the present disclosure.

[0364] Referring to Figure 21, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 in Figure 19 and can be composed of various elements, components, units, and / or modules. For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and transceivers (etc.) 114. For example, the communication circuit 112 may include one or more processors 102, 202 and / or one or more memories 104, 204 in Figure 18. For example, the transceivers (etc.) 114 may include one or more transceivers 106, 206 and / or one or more antennas 108, 208 in Figure 19. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls the various operations 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 / instructions / information stored in the memory unit 130. The control unit 120 can also transmit the information stored in the memory unit 130 to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit 110, or store information received from an external device (e.g., another communication device) via a wireless / wired interface through the communication unit 110 in the memory unit 130.

[0365] The additional element 140 can be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of the following: a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computing unit. However, wireless devices can be embodied in forms such as robots (100a in Figure 18), vehicles (100b-1, 100b-2 in Figure 18), XR devices (100c in Figure 18), mobile devices (100d in Figure 18), home appliances (100e in Figure 18), IoT devices (100f in Figure 18), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices (400 in Figure 18), base stations (200 in Figure 18), and network nodes. Depending on the use-example / service, wireless devices may be mobile or used in a fixed location.

[0366] In Figure 21, the various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 can be interconnected as a whole via a wired interface, or at least some of them can be connected wirelessly via the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be connected via a wired connection, and the control unit 120 and the first units (e.g., 130, 140) can be connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / part, and / or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may consist of a collection of one or more processors. For example, the control unit 120 may consist of a collection of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processing processor, a memory control processor, and so on. As another example, the memory unit 130 may consist of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0367] The following provides a more detailed explanation of the example shown in Figure 21, with reference to other drawings.

[0368] Figure 22 shows a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glass), or a portable computer (e.g., a laptop computer). The portable device may be referred to as an MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless terminal). The embodiment in Figure 22 can be combined with various embodiments of the present disclosure.

[0369] Referring to Figure 22, the portable device 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input / output unit 140c. The antenna unit 108 may be composed of a part of the communication unit 110. Blocks 110-130 / 140a-140c correspond to blocks 110-130 / 140 in Figure 21, respectively.

[0370] The communication unit 110 can send and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit 120 can control the components of the portable device 100 and perform various operations. The control unit 120 may include an AP (Application Processor). The memory unit 130 can store data / parameters / programs / code / instructions necessary for driving the portable device 100. The memory unit 130 can also store input / output data / information, etc. The power supply unit 140a supplies power to the portable device 100 and may include wired / wireless charging circuits, batteries, etc. The interface unit 140b can support the connection of the portable device 100 with other external devices. The interface unit 140b may include various ports for connection with external devices (e.g., audio input / output ports, video input / output ports). The input / output unit 140c can receive and output video information / signals, audio information / signals, data, and / or information input from the user. The input / output section 140c may include a camera, microphone, user input section, display section 140d, speaker and / or haptic module, etc.

[0371] For example, in the case of data communication, the input / output unit 140c acquires information / signals input from the user (e.g., touch, text, voice, image, video), and the acquired information / signals can be stored in the memory unit 130. The communication unit 110 converts the information / signals stored in memory into a radio signal and can transmit the converted radio signal directly to other radio devices or to a base station. Furthermore, after receiving a radio signal from another radio device or base station, the communication unit 110 can restore the received radio signal to its original information / signal. The restored information / signal is stored in the memory unit 130 and can then be output via the input / output unit 140c in various forms (e.g., text, voice, image, video, haptic).

[0372] Figure 23 shows a vehicle or autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle can be implemented as a mobile robot, a vehicle, a train, a manned or unmanned aerial vehicle (AV), a ship, etc. The embodiment in Figure 23 can be combined with various embodiments of the present disclosure.

[0373] Referring to Figure 23, 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 composed of part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in Figure 21, respectively.

[0374] The communication unit 110 can send and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 can control elements of the vehicle or autonomous vehicle 100 and perform various operations. The control unit 120 may include an ECU (Electronic Control Unit). The drive unit 140a can make the vehicle or autonomous vehicle 100 travel on the ground. The drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering system, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and may include a wired / wireless charging circuit, battery, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c may include an IMU (inertial measurement unit) sensor, collision sensor, wheel sensor, speed sensor, tilt sensor, weight detection sensor, heading sensor, position module, vehicle forward / reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, etc. The autonomous driving unit 140d can implement technologies such as maintaining a lane while driving, automatically adjusting speed like adaptive cruise control, automatically driving along a predetermined route, and automatically setting a route and driving when a destination is set.

[0375] 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 route 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 moves along the autonomous driving route according to the driving plan (e.g., speed / direction adjustment). During autonomous driving, the communication unit 110 can acquire the latest traffic information data from the external server non-periodically and acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c can acquire vehicle status and surrounding environment information. The autonomous driving unit 140d can update the autonomous driving route and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information such as vehicle position, autonomous driving route, and driving plan to the external server. The external server can predict traffic information data in advance using AI technology, etc., based on the information collected from the vehicle or autonomous vehicle, and can provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0376] The claims described herein can be combined in various ways. For example, the technical features of the method claims herein can be combined and embodied in an apparatus, and the technical features of the apparatus claims herein can be combined and embodied in a method. Furthermore, the technical features of the method claims and the technical features of the apparatus claims herein can be combined and embodied in an apparatus, and the technical features of the method claims and the technical features of the apparatus claims herein can be combined and embodied in a method.

[0377] [Claims when filing an international application] [Claim 1] A method by which the first device performs wireless communication, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission, in a method. [Claim 2] The method according to claim 1, wherein the plurality of extension times, including the first extension time, are determined based on the subcarrier interval associated with the inter-device transmission. [Claim 3] The method according to claim 1, further comprising the step of receiving information from the base station regarding a scheme for determining the plurality of extended times. [Claim 4] The method according to claim 3, wherein the method for determining the plurality of extension times includes a method using a default cyclic prefix extension value or a method determined based on the subcarrier interval used. [Claim 5] The method according to claim 1, wherein it is determined whether or not to use a basic cyclic prefix extension value to determine the plurality of extension times based on the transmission power associated with the inter-device transmission. [Claim 6] The method according to claim 5, wherein the basic cyclic prefix extension value is used to determine the plurality of extension times based on the fact that the transmitted power is greater than or equal to a threshold. [Claim 7] The method according to claim 1, wherein the information for the second resource is received in the control information of the base station-to-device. [Claim 8] The method according to claim 7, wherein the control information of the base station-to-device is received via the physical control channel of the base station-to-device. [Claim 9] The method according to claim 1, wherein the reception of information for the second resource is dynamic resource allocation. [Claim 10] The method according to claim 1, wherein the end time of the first resource is the last symbol time of the first resource. [Claim 11] The method according to claim 1, wherein the first resource is included in the control resource set. [Claim 12] The method according to claim 1, further comprising the step of performing channel sensing associated with a channel access procedure based on the start time of the second resource. [Claim 13] The method according to claim 12, wherein the inter-device transmission is performed based on the result of the channel sensing being idle (IDLE). [Claim 14] A first device that performs wireless communication, At least one transceiver, At least one processor, and The first device comprises at least one memory which is executablely linked to the at least one processor and which records instructions for performing an operation, based on that the operation is performed by the at least one processor, The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first device, wherein the first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission. [Claim 15] A device configured to control the first terminal, At least one processor, and The first terminal comprises at least one memory which can be executablely linked to the at least one processor and which records instructions for performing an operation, based on that it is executed by the at least one processor, The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-UE transmission based on the first resource; and The step of deciding to perform the inter-terminal transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the terminal processing time; The terminal processing time includes a first extension time associated with cyclic prefix extension, and The apparatus wherein the first extension time is the longest of a plurality of extension times associated with the circular prefix extension permitted for the inter-terminal transmission. [Claim 16] A non-temporary, computer-readable storage medium for recording instructions, The aforementioned instruction, upon execution, causes the first device to perform an operation. The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and A non-temporary, computer-readable storage medium wherein the first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission. [Claim 17] A method by which a second device performs wireless communication, The process includes the step of receiving an inter-device transmission from the first device based on the second resource, The inter-device transmission is determined to be performed based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. The first resource is a resource for which information relating to the second resource has been received from the base station to the first device. The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission, in a method. [Claim 18] The method according to claim 17, wherein the end time of the first resource is the last symbol time of the first resource. [Claim 19] A second device that performs wireless communication, At least one transceiver, At least one processor, and The second device comprises at least one memory which is executablely linked to the at least one processor and which records instructions for performing an operation, based on execution by the at least one processor, The aforementioned operation is, The process includes the step of receiving an inter-device transmission from the first device based on the second resource; The inter-device transmission is determined to be performed based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. The first resource is a resource for which information relating to the second resource has been received from the base station to the first device. The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with the cyclic prefix extension permitted for inter-device transmission, in the second device. [Claim 20] The second apparatus according to claim 19, wherein the termination point of the first resource is the last symbol time of the first resource.

Claims

1. A method by which the first device performs wireless communication, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and, The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission, in a method.

2. The method according to claim 1, wherein the plurality of extension times, including the first extension time, are determined based on the subcarrier interval associated with the inter-device transmission.

3. The method according to claim 1, further comprising the step of receiving information from the base station regarding a scheme for determining the plurality of extended times.

4. The method according to claim 3, wherein the method for determining the plurality of extension times includes a method using a default cyclic prefix extension value or a method determined based on the subcarrier interval used.

5. The method according to claim 1, wherein it is determined whether or not to use a basic cyclic prefix extension value to determine the plurality of extension times based on the transmission power associated with the inter-device transmission.

6. The method according to claim 5, wherein the basic cyclic prefix extension value is used to determine the plurality of extension times based on the fact that the transmission power is greater than or equal to a threshold.

7. The method according to claim 1, wherein the information for the second resource is received in the control information of the base station-to-device.

8. The method according to claim 7, wherein the control information of the base station-to-device is received via the physical control channel of the base station-to-device.

9. The method according to claim 1, wherein the reception of information for the second resource is dynamic resource allocation.

10. The method according to claim 1, wherein the termination point of the first resource is the last symbol time of the first resource.

11. The method according to claim 1, wherein the first resource is included in the control resource set.

12. The method according to claim 1, further comprising the step of performing channel sensing associated with a channel access procedure based on the start time of the second resource.

13. The method according to claim 12, wherein the inter-device transmission is performed based on the result of the channel sensing being idle (IDLE).

14. A first device for performing wireless communication, At least one transceiver, At least one processor, and The first device comprises at least one memory which is executablely linked to the at least one processor and which records instructions for performing an operation based on execution by the at least one processor, The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and, The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first device, wherein the first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission.

15. A device configured to control the first terminal, At least one processor, and The first terminal comprises at least one memory which can be executablely linked to the at least one processor and which records instructions for performing an operation based on being executed by the at least one processor, The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-UE transmission based on the first resource; and The step of deciding to perform the inter-terminal transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is equal to or greater than the terminal processing time; The terminal processing time includes a first extension time associated with cyclic prefix extension, and The apparatus wherein the first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-terminal transmission.

16. A non-temporary computer-readable storage medium for recording instructions, The aforementioned instruction, upon execution, causes the first device to perform an operation. The aforementioned operation is, The steps include: receiving information from the base station regarding a second resource for performing inter-device transmission based on the first resource; and, The step of deciding to perform the inter-device transmission based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time; The device processing time includes a first expansion time associated with cyclic prefix expansion, and A non-temporary, computer-readable storage medium wherein the first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission.

17. A method by which the second device performs wireless communication, The process includes the step of receiving an inter-device transmission from the first device based on the second resource, The inter-device transmission is determined to be performed based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. The first resource is a resource for which information relating to the second resource has been received from the base station to the first device. The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with cyclic prefix extensions permitted for inter-device transmission, in a method.

18. The method according to claim 17, wherein the termination point of the first resource is the last symbol time of the first resource.

19. A second device that performs wireless communication, At least one transceiver, At least one processor, and The second device comprises at least one memory which is executablely linked to the at least one processor and which records instructions for performing an operation based on execution by the at least one processor, The aforementioned operation is, The process includes the step of receiving an inter-device transmission from the first device based on a second resource; The inter-device transmission is determined to be performed based on the fact that the time interval from the end of the first resource to the start of the second resource is greater than or equal to the device processing time. The first resource is a resource for which information relating to the second resource has been received from the base station to the first device. The device processing time includes a first expansion time associated with cyclic prefix expansion, and The first extension time is the longest of a plurality of extension times associated with the cyclic prefix extension permitted for inter-device transmission, in the second device.

20. The second apparatus according to claim 19, wherein the termination point of the first resource is the last symbol time of the first resource.

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