Method and apparatus for determining priority among end-to-end physical feedback channel transmissions in a shared spectrum

Abstract

A method for operating a first device 100 in a wireless communication system is proposed, which may include the steps of: determining, on a shared spectrum, a first RB set including a first device-to-device physical feedback channel transmission having a smallest associated device-to-device communication priority value among a plurality of first scheduled device-to-device physical feedback channel transmissions; and performing a simultaneous device-to-device physical feedback channel transmission for at least one second scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions based on the first RB set and at least one first RB set adjacent to the first RB set.

Description

[Technical Field]

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

[0002] 5G NR is a successor technology to LTE (long term evolution) and is a new clean-slate mobile communication system characterized by high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low-frequency bands below 1 GHz to intermediate-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

[0003] The goals of the 6G (wireless communication) system 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 for battery-free IoT (internet of things) devices, (vi) ultra-reliable connections, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system is based on four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy the requirements shown in Table 1 below. For example, Table 1 shows an example of 6G system requirements.

[0004] [Table 1] Summary of the Invention [Means for solving the problem]

[0005] According to an embodiment of the present disclosure, a method for wireless communication by a first device is provided, which may include: determining, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions; and performing a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0006] According to one embodiment of the present disclosure, a first device for wireless communication is provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations. For example, the operations may include: determining, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having a lowest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions; and performing a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0007] According to one embodiment of the present disclosure, an apparatus configured to control a first terminal is provided. For example, the apparatus may include: at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first terminal to perform operations. For example, the operations may include: determining, on a shared spectrum, a first RB set including a first inter-UE physical feedback channel transmission having a smallest associated inter-UE communication priority value among a plurality of first scheduled inter-UE physical feedback channel transmissions; and performing a simultaneous inter-UE physical feedback channel transmission with at least one second scheduled inter-UE physical feedback channel transmission among the plurality of first scheduled inter-UE physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0008] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium having stored thereon instructions may be provided, which, when executed, may cause a first device to: determine, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission among a plurality of first scheduled inter-device physical feedback channel transmissions, the first inter-device physical feedback channel transmission having an associated inter-device communication priority value that is lowest; and perform a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0009] According to an embodiment of the present disclosure, a method for a second device to perform wireless communication is provided, for example, the method may include: detecting a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum, where the first inter-device physical feedback channel transmission is included in a simultaneous inter-device physical feedback channel transmission, the inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set, and the first RB set may be determined based on the first inter-device physical feedback channel transmission having the smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

[0010] According to one embodiment of the present disclosure, a second device for wireless communication is provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an operation. For example, the operation may include: detecting a first inter-device physical feedback channel transmission based on inter-device physical feedback channel resources on a shared spectrum, the first inter-device physical feedback channel transmission being included in a simultaneous inter-device physical feedback channel transmission, the inter-device physical feedback channel resources being included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set, and the first RB set including a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions. [Brief explanation of the drawings]

[0011] [Figure 1] 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. [Figure 2] 1 illustrates the electromagnetic spectrum, according to one embodiment of the present disclosure. [Figure 3] 1 illustrates an example of a typical scenario of NTN based on transparent payload, according to an embodiment of the present disclosure. [Figure 4] 1 illustrates an example of a typical scenario of NTN based on regenerative payload, according to one embodiment of the present disclosure. [Figure 5] 1 illustrates an example of a sensing operation according to an embodiment of the present disclosure. [Figure 6] 1 illustrates a slot structure for a frame according to one embodiment of the present disclosure. [Figure 7] 1 illustrates an example of a BWP according to an embodiment of the present disclosure. [Figure 8] 1 illustrates a procedure in which a terminal performs V2X or SL communication depending on a resource allocation mode according to an embodiment of the present disclosure. [Figure 9] 1 illustrates an example of a wireless communication system that supports unlicensed spectrum, according to one embodiment of the present disclosure. [Figure 10] 1 illustrates a method for occupying resources in an unlicensed spectrum according to one embodiment of the present disclosure. [Figure 11] 1 illustrates a case where multiple LBT-SBs are included in an unlicensed band according to one embodiment of the present disclosure. [Figure 12] 1 illustrates a CAP operation for a base station's downlink signal transmission over an unlicensed spectrum, according to one embodiment of the present disclosure. [Figure 13] 1 illustrates a Type 1 CAP operation of a terminal for uplink signal transmission according to one embodiment of the present disclosure. [Figure 14] 1 illustrates a procedure for determining multiple end-to-end physical feedback channels to be transmitted via simultaneous end-to-end physical feedback channel transmissions, according to one embodiment of the present disclosure. [Figure 15] 1 illustrates a procedure for determining multiple end-to-end physical feedback channels to be transmitted via simultaneous end-to-end physical feedback channel transmissions, according to one embodiment of the present disclosure. [Figure 16] 1 illustrates a method for a first device to perform wireless communication according to one embodiment of the present disclosure. [Figure 17] 1 illustrates a method for a second device to perform wireless communication according to one embodiment of the present disclosure. [Figure 18] 1 illustrates a communication system 1 according to one embodiment of the present disclosure. [Figure 19] 1 illustrates a wireless device according to one embodiment of the present disclosure. [Figure 20]1 illustrates a signal processing circuit for a transmit signal according to one embodiment of the present disclosure. [Figure 21] 1 illustrates a wireless device according to one embodiment of the present disclosure. [Figure 22] 1 illustrates a mobile device according to one embodiment of the present disclosure. [Figure 23] 1 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] As used herein, "A or B" can mean "only A," "only B," or "both A and B." Also, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B or C" can mean "only A," "only B," "only C," or "any combination of A, B, and C."

[0013] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Thus, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0014] As used herein, "at least one of A and B" can mean "only A," "only B," or "both A and B." Additionally, as used herein, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted as "at least one of A and B."

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

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

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

[0018] In this specification, technical features individually described in one drawing may be embodied individually or simultaneously.

[0019] In this specification, a higher layer parameter may be a parameter that is configured for a terminal, configured in advance, or predefined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

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

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

[0022] The technology proposed in this specification is implemented in 6G wireless technology and can be applied to various 6G systems. For example, the 6G system 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] 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 1 can be combined with various embodiments of the present disclosure.

[0024] New network characteristics in 6G include:

[0025] -satellites integrated network

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

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

[0028] -Ubiquitous super 3D connectivity: Connecting drones and very low Earth orbit satellite networks to core network functions will create ubiquitous super 3D connectivity in 6G.

[0029] Some common requirements for the characteristics of the new 6G network mentioned above are:

[0030] -Small cell networks

[0031] -Ultra-dense heterogeneous network

[0032] -High-capacity backhaul

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

[0034] -Software and virtualization

[0035] The core implementation technologies of the 6G system are explained 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 should be executed. This means 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. AI also enables rapid communication in BCI (Brain Computer Interface). AI-based communication systems are supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent radios, self-sustaining wireless networks, and machine learning.

[0037] -THz communication: Data transmission rates can be increased by increasing bandwidth. This can be achieved by using sub-THz communication over a wide bandwidth and applying advanced massive MIMO technology. THz waves, also known as submillimeter radiation, typically refer to the frequency band between 0.1 THz and 10 THz, with wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz band range (sub-THz band) is considered the main portion of the THz band for cellular communications. Adding the sub-THz band to the mmWave band will increase 6G cellular communication capacity. Of the defined THz bands, 300 GHz-3 THz is in the far-infrared (IR) frequency band. While the 300 GHz-3 THz band is part of a broadband, it is at the boundary of the broadband and immediately behind the RF band. Therefore, the 300 GHz-3 THz band is similar to RF. Figure 2 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of Figure 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) a wide usable bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth produced by highly directional antennas reduces interference. The small wavelength of THz signals allows a greater number of antenna elements to be integrated into devices and base stations operating in this band. This allows for the use of advanced adaptive array techniques that can overcome range limitations.

[0038] -Large-scale MIMO technology

[0039] -Hologram beamforming (HBF)

[0040] -Optical wireless technology

[0041] -Free Space Optical Transmission Backhaul Network (FSO backhaul network)

[0042] -Quantum communication

[0043] -cell-free communication

[0044] -Integration of wireless information and power transmission

[0045] -Integration of wireless communication and sensing

[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 an important element in 6G wireless communications. In most cases, high-speed data wireless connections are provided using UAV technology. Base station (BS) entities can be installed on UAVs to provide cellular connectivity. UAVs have specific features not found in fixed BS infrastructure, such as easy deployment, strong line-of-sight links, and freedom of controlled mobility. During emergency situations such as natural disasters, deploying terrestrial communication infrastructure is economically unfeasible and sometimes unable to provide services in volatile environments. UAVs can easily handle such situations. UAVs can become a new paradigm in the wireless communications field. This technology facilitates the three fundamental requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support various purposes such as improved 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 communications.

[0052] -Autonomous driving: V2X (vehicle to everything), a key element in building autonomous driving infrastructure, is a technology that allows vehicles to communicate and share information with various elements on the road, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I), to drive autonomously. High-speed transmission and low-latency technology are essential to maximize autonomous driving performance and ensure high safety. Furthermore, autonomous driving in the future will go beyond simply transmitting warnings and guidance messages to the driver and require active intervention in vehicle operation and direct control of the vehicle in dangerous situations. Because the volume of information that needs to be transmitted and received can be enormous, 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0053] Non-terrestrial networks (NTN): NTN may refer to a network or network segment that uses radio frequency (RF) resources onboard a satellite (or an unmanned aerial system (UAS) platform). FIG. 3 illustrates an example of a typical scenario for an NTN based on a transparent payload according to an embodiment of the present disclosure. FIG. 4 illustrates an example of a typical scenario for an NTN based on a regenerative payload according to an embodiment of the present disclosure. The embodiments of FIG. 3 or 4 may be combined with various embodiments of the present disclosure. Referring to FIG. 3, a satellite (or a UAS platform) may establish a service link with a UE. A satellite (or a UAS platform) may connect to a gateway via a feeder link. A satellite may connect to a data network via a gateway. A beam footprint may refer to an area that can receive a signal transmitted by a satellite. Referring to FIG. 4, a satellite (or a UAS platform) may establish a service link with a UE. A satellite (or UAS platform) connected to a UE can connect to other satellites (or UAS platforms) via inter-satellite links (ISLs). Other satellites (or UAS platforms) can connect to a gateway via feeder links. A satellite can connect to a data network via other satellites and gateways based on a regenerative payload. If there is no ISL between a satellite and another satellite, a feeder link between the satellite and a gateway may be required. Figures 3 and 4 are merely examples of NTN scenarios, and NTN can be implemented based on various scenarios.For example, a satellite (or UAS platform) can implement a transparent or regenerative (with on-board processing) payload. For example, a satellite (or UAS platform) can generate 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 on-board antenna diagram and minimum 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 modified. For example, a regenerative payload may include radio frequency filtering, frequency conversion and amplification, demodulation / decoding, switching and / or routing, and coding / modulation. For example, a regenerative payload is substantially equivalent to a satellite (or UAS platform) equipped with all or part of a base station's functionality.

[0054] Integrated Sensing and Communication (ISAC): Wireless sensing is a technology that uses radio frequencies to obtain information about the environment and / or the characteristics of objects within it by detecting an object's instantaneous linear velocity, angle, distance (range), etc. Radio frequency sensing does not require connecting to an object via a device in the network, allowing for device-free object location services. Obtaining range, velocity, and angle information from radio frequency signals can provide a wide range of new functions, such as various object detection and recognition (e.g., vehicles, humans, animals, UAVs) and high-precision positioning, 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, assisted vehicle steering and navigation, 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, camera) to further support 3GPP-based sensing. For example, the operation of a wireless sensing service, i.e., the sensing operation, can rely on the transmission, reflection, and scattering processing of wireless sensing signals. Therefore, wireless sensing can provide an opportunity to augment existing communication systems with wireless communication and sensing networks in a communication network. FIG. 5 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 5 can be combined with various embodiments of the present disclosure. Specifically, FIG. 5(a) illustrates an example of sensing using a co-located sensing receiver and sensing transmitter (e.g., monostatic sensing), and FIG. 5(b) illustrates an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0055] The radio interface protocol layers between a terminal and a network can be divided into L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the bottom three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems. Among these, the physical layer, which belongs to Layer 1, provides an information transfer service using a physical channel, and the Radio Resource Control (RRC) layer, which is located in Layer 3, controls radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0056] The physical layer provides information transfer services to higher layers using physical channels. The physical layer is connected to the higher layer, the Medium Access Control (MAC) layer, via transport channels. Data moves between the MAC layer and the physical layer via transport channels. Transport channels are classified according to how and what characteristics data is transmitted over the radio interface.

[0057] Data is transferred between different physical layers, i.e., between the physical layers of a transmitter and a receiver, via a physical channel, which can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as radio resources.

[0058] The MAC layer provides services to the higher-level radio link control (RLC) layer via logical channels. The MAC layer provides a mapping function from multiple logical channels to multiple transport channels. The MAC layer also provides a logical channel multiplexing function by mapping multiple logical channels to a single transport channel. The MAC sublayer provides data transfer services on the logical channels.

[0059] The RLC layer performs concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs). To guarantee various Quality of Service (QoS) requirements for Radio Bearers (RBs), the RLC layer provides three operation modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction via automatic repeat request (ARQ).

[0060] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. RB refers to the logical path provided by layer 1 (physical layer or PHY layer) and layer 2 (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.

[0061] The functions of the PDCP layer in the user plane include user data transmission, header compression, and ciphering, and the functions of the PDCP layer in the control plane include control plane data transmission and encryption / integrity protection.

[0062] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between QoS flows and data radio bearers, QoS flow identifier (ID) marking in downlink and uplink packets, etc.

[0063] RB configuration refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service and setting their specific parameters and operation methods. RBs are divided into two types: SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer). SRB is used as a path to transmit RRC messages in the control plane, and DRB is used as a path to transmit user data in the user plane.

[0064] When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in an RRC_CONNECTED state; otherwise, it is in an RRC_IDLE state. In the case of NR, an RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state maintains a connection with the core network and can release the connection with the base station.

[0065] Downlink transport channels for transmitting data from a network to a terminal include a Broadcast Channel (BCH) for transmitting system information and a Downlink Shared Channel (SCH) for transmitting user traffic and control messages. Traffic or control messages of a downlink multicast or broadcast service can be transmitted via the Downlink SCH or via a separate Multicast Channel (MCH). Meanwhile, uplink transport channels for transmitting data from a terminal to a network include a Random Access Channel (RACH) for transmitting initial control messages and an Uplink Shared Channel (SCH) for transmitting user traffic and control messages.

[0066] Above the transport channels, logical channels that are mapped to the transport channels include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0067] Radio frames can be used for uplink and downlink transmission. A radio frame has a length of 10 ms and can be defined as two 5 ms half-frames (HF). A half-frame can include five 1 ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots in a subframe can be determined by the subcarrier spacing (SCS). Each slot can include 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP).

[0068] When a normal CP is used, each slot can contain 14 symbols. When an extended CP is used, each slot can contain 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols) or Single Carrier-FDMA (SC-FDMA) symbols (or Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbols).

[0069] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when a normal CP or an 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 shown below.

[0070] [Table 2]

[0071] 6 illustrates a slot structure of a frame according to one embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.

[0072] Referring to FIG. 6, a slot includes multiple symbols in the time domain. A carrier includes multiple subcarriers in the frequency domain. A Resource Block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) can be defined as multiple (P)RBs (Physical Resource Blocks) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed via activated BWPs. Each element is called a resource element (RE) in the resource grid, and one complex symbol can be mapped to it.

[0073] A carrier wave includes 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 physical resource blocks (PRBs) in the frequency domain, and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier wave can include up to N BWPs (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 one complex symbol can be mapped to it.

[0074] A Bandwidth Part (BWP) is a contiguous set of physical resource blocks (PRBs) in a given numerology. PRBs can be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0075] 7 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 7 can be combined with various embodiments of the present disclosure. In the embodiment of FIG. 7, it is assumed that there are three BWPs.

[0076] Referring to Figure 7, CRBs (common resource blocks) are carrier resource blocks numbered from one end of a carrier band to the other end, and PRBs are resource blocks numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0077] BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP ) For example, point A is the external reference point of the PRB of the carrier to which subcarrier 0 of all numerologies (e.g., all numerologies supported by the network on the carrier) is aligned. For example, the offset is the PRB spacing between the lowest subcarrier in a given numerology and point A. For example, the bandwidth is the number of PRBs in a given numerology.

[0078] A Sidelink Synchronization Signal (SLSS) is a sidelink (SL)-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS). The PSSS may be referred to as a Sidelink Primary Synchronization Signal (S-PSS), and the SSSS may be referred to as a Sidelink Secondary Synchronization Signal (S-SSS). For example, length-127 M-sequences may be used for the S-PSS, and length-127 Gold sequences may be used for the S-SSS. For example, a terminal may perform initial signal detection and acquire synchronization using the S-PSS. For example, a terminal may acquire detailed synchronization and detect a synchronization signal ID using the S-PSS and S-SSS.

[0079] The PSBCH (Physical Sidelink Broadcast Channel) is a (broadcast) channel that transmits basic (system) information that a terminal must know first before transmitting or receiving an SL signal. For example, the basic information includes information related to SLSS, duplex mode (DM), TDDUL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, type of application related to SLSS, subframe offset, broadcast information, etc. For example, for evaluating PSBCH performance, in NR V2X, the size of the PSBCH payload is 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0080] The S-PSS, S-SSS, and PSBCH can be included in a block format (e.g., an S-SS (Synchronization Signal) / PSBCH block, hereinafter referred to as an S-SSB (Sidelink-Synchronization Signal Block)) that supports periodic transmission. The S-SSB can have the same numerology (i.e., SCS and CP length) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in a carrier, and the transmission bandwidth is within a (pre-) configured S-BWP (Sidelink Bandwidth Part). For example, the bandwidth of the S-SSB is 11 RBs (Resource Blocks). For example, the PSBCH spans 11 RBs. The frequency location of the S-SSB can be (pre-) configured. Therefore, the terminal does not need to perform hypothesis detection in frequency to find the S-SSB in the carrier.

[0081] 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a resource allocation mode according to an embodiment of the present disclosure. The embodiment of FIG. 8 can be combined with various embodiments of the present disclosure.

[0082] 8(a), in resource allocation mode 1, a base station may schedule SL resources to be used by a terminal for SL transmission. For example, in step S800, the base station may transmit information related to SL resources and / or information related to UL resources to a 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.

[0083] For example, the first terminal may receive information related to dynamic grant (DG) resources and / or information related to configured grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In this specification, the DG resources may be resources configured / assigned to the first terminal by the base station via downlink control information (DCI). In this specification, the CG resources may be (periodic) resources configured / assigned to the first terminal by the base station via DCI and / or an RRC message. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first terminal. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first terminal, and the base station may send a DCI related to the activation or release of the CG resources to the first terminal.

[0084] In step S810, the first terminal may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to a second terminal based on the resource scheduling. In step S820, the first terminal may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) associated with the PSCCH to a second terminal. In step S830, the first terminal may receive a PSFCH associated with the PSCCH / PSSCH from a second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second terminal via the PSFCH. In step S840, the first terminal may transmit / report HARQ feedback information to a base station via a PUCCH or a 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 a preset rule. For example, the DCI may be DCI for scheduling of a SL.

[0085] Referring to (b) of FIG. 8, in resource allocation mode 2, the terminal can determine SL transmission resources within SL resources configured by the base station / network or pre-configured SL resources. For example, the configured 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 self-select resources within a configured resource pool to perform SL communication. For example, the terminal can perform sensing and resource (re)selection procedures and self-select resources within a selection window. For example, the sensing can be performed in units of subchannels. For example, in step S810, the first terminal that self-selected resources within a resource pool can use the resources to transmit PSCCH (e.g., SCI (Sidelink Control Information) or 1 st In step S820, the first terminal transmits a PSSCH (e.g., a 2-stage SCI) associated with the PSCCH to the second terminal. nd In step S830, the first terminal may receive a PSFCH associated with the PSCCH / PSSCH from the second terminal.

[0086] Referring to (a) or (b) of FIG. 8, for example, the first terminal can transmit an SCI to the second terminal on the PSCCH. Alternatively, for example, the first terminal can transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal on the PSCCH and / or PSSCH. In this case, the second terminal can decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal. In this specification, the SCI transmitted on the PSCCH is referred to as a 1 st SCI, 1st SCI, 1 st -stage SCI or 1 st The SCI transmitted on the PSSCH can be referred to as a 2-stage SCI format. nd SCI, 2nd SCI, 2 nd-stage SCI or 2 nd -stage SCI format.

[0087] 8(a) or 8(b), in step S830, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine a PSFCH resource, and the second terminal may use the PSFCH resource to transmit HARQ feedback to the first terminal.

[0088] Referring to (a) of FIG. 8, in step S840, the first terminal can transmit SL HARQ feedback to the base station via the PUCCH and / or PUSCH.

[0089] In the following, the UE procedure for reporting HARQ-ACK in the sidelink is described.

[0090] The UE uses N to transmit a PSFCH containing HARQ-ACK information in response to the PSSCH reception. PSSCH subch The UE may provide HARQ-ACK information including an ACK or NACK, or only a NACK, in accordance with the SCI format that schedules PSSCH reception on one or more subchannels from the subchannels.

[0091] The UE is provided with the number of slots in the resource pool for PSFCH transmission occasion resources by sl-PSFCH-Period-r16. If the number is 0, PSFCH transmission from the UE is disabled in the resource pool. The UE is provided with k mod N PSFCH PSSCH = 0 if slot t' k SL (0≦k <T’ max ) where t' k SL is a slot belonging to the resource pool, and T'max is the number of slots belonging to the resource pool within 10240 msec, and N PSFCH PSSCH is provided in sl-PSFCH-Period-r16. The UE can be instructed by higher layers not to transmit a PSFCH in response to PSSCH reception. If the UE receives a PSSCH in a resource pool and the HARQ feedback enabled / disabled indicator field included in the associated SCI Format 2-A or SCI Format 2-B has a value of 1, the UE provides HARQ-ACK information via a PSFCH transmission in the resource pool. The UE transmits the PSFCH in the first slot, where the first slot includes the PSFCH resource and is the slot after the minimum number of slots provided by sl-MinTimeGapPSFCH-r16 of the resource pool after the last slot of PSSCH reception.

[0092] The UE transmits the PSFCH on the PRBs of the resource pool using a set M of PRBs in the resource pool. PSFCH PRB,set The number of subchannels for the resource pool, N, is provided by sl-PSFCH-RB-Set-r16. subch and N PSFCH PSSCH For a smaller or equal number of PSSCH slots associated with a PSFCH slot, the UE PRB,set PSFCH Among the PRBs, [(i+j·N PSFCH PSSCH )·M PSFCH subch,slot , (i+1+j·N PSFCH PSSCH )·M PSFCH subch,slot -1] PRB is allocated to slot i and subchannel j among the PSSCH slots linked with the PSFCH slot. PSFCH subch,slot =M PSFCH PRB,set / (N subch NPSFCH PSSCH ), 0≦i <N PSFCH PSSCH , 0≦j <N subch and the allocation starts with increasing i and continues with increasing j. PSFCH PRB,set N subch N PSFCH PSSCH Expect it to be a multiple of .

[0093] The UE determines the number of PSFCH resources available for multiplexing HARQ-ACK information included in the PSFCH transmission as R PSFCH PRB,CS =N PSFCH type M PSFCH subch,slot N PSFCH CS Here, N PSFCH CS is the number of cyclic shift pairs for the resource pool, and based on instructions from higher layers,

[0094] -N PSFCH type = 1 and M PSFCH subch,slot The PRB is associated with the starting subchannel of the PSSCH in question,

[0095] -N PSFCH type =N PSSCH subch and N PSSCH subch M PSFCH subch,slot PRB is the N of the PSSCH in question. PSSCH subch It relates to one or more of the sub-channels.

[0096] PSFCH resources are allocated first PSFCH type M PSFCH subch,slot PRBs are indexed in ascending order of PRB index, then N PSFCH CSThe cyclic shift pairs are indexed in ascending order of cyclic shift pair index.

[0097] The UE receives the index of the PSFCH resource for PSFCH transmission (P ID +M ID )mod R PSFCH PRB,CS Here, P ID is the physical layer source ID provided by the SCI format 2-A or 2-B scheduling PSSCH reception, and M ID is the ID of the UE receiving the PSSCH indicated by the higher layer if the UE detects SCI format 2-A with the cast type indicator field value "01", otherwise M ID is 0.

[0098] The UE uses Table 3 to PSFCH CS and a cyclic shift pair index corresponding to the PSFCH resource index.

[0099] [Table 3]

[0100] If the UE detects SCI format 2-A with a cast type indicator field value of "01" or "10", as shown in Table 4, or if the UE detects SCI format 2-B or SCI format 2-A with a cast type indicator field value of "11", as shown in Table 5, the UE shall use the value m to calculate the cyclic shift α value. cs The UE applies one cyclic shift of the cyclic shift pair to the sequence used for PSFCH transmission.

[0101] [Table 4]

[0102] [Table 5]

[0103] On the other hand, the conventional NR-U (unlicensed spectrum) supports communication between terminals and base stations in unlicensed spectrum, and Rel-18 is expected to support a mechanism that enables sidelink terminals to communicate in unlicensed spectrum as well.

[0104] In this disclosure, a channel may refer to a frequency axis resource set for performing Listen-Before-Talk (LBT). In NR-U, a channel may refer to a 20 MHz LBT bandwidth and may have the same meaning as an RB set. For example, an RB set may be defined in Section 7 of 3GPP TS 38.214 V17.0.0.

[0105] In this disclosure, CO (channel occupancy) may refer to time / frequency axis resources acquired by a base station or a terminal after successful LBT.

[0106] In this disclosure, COT (channel occupancy time) may refer to the time axis resource acquired by a base station or a terminal after successful LBT. CO can be shared between the base station (or terminal) that has acquired it and the terminal (or base station), which can be called COT sharing. Depending on the initiating device, this can be called gNB-initiated COT or UE-initiated COT.

[0107] A wireless communication system that supports unlicensed bands (shared spectrum) will be described below.

[0108] 9 illustrates an example of a wireless communication system supporting unlicensed spectrum according to an embodiment of the present disclosure. For example, FIG. 9 may include an NR-U (unlicensed spectrum) wireless communication system. The embodiment of FIG. 9 may be combined with various embodiments of the present disclosure.

[0109] In the following description, a cell operating in a licensed band (hereinafter, L-band) can be defined as an LCell, and a carrier of an LCell can be defined as a (DL / UL / SL)LCC. Also, a cell operating in an unlicensed band (hereinafter, U-band) can be defined as a UCell, and a carrier of a UCell can be defined as a (DL / UL / SL)UCC. A cell's carrier / carrier-frequency can refer to the operating frequency (e.g., center frequency) of a cell. A cell / carrier (e.g., CC) can be called a cell.

[0110] As shown in (a) of Figure 9, when a terminal and a base station transmit and receive signals via carrier-coupled LCC and UCC, the LCC can be set as a PCC (Primary CC) and the UCC can be set as an SCC (Secondary CC). As shown in (b) of Figure 9, the terminal and a base station can transmit and receive signals via one UCC or multiple carrier-coupled UCCs. That is, the terminal and a base station can transmit and receive signals via only UCC(s) without an LCC. For standalone operation, PRACH, PUCCH, PUSCH, SRS transmission, etc. are supported in the UCell.

[0111] 9, the base station may be replaced by a terminal, in which case, for example, PSCCH, PSSCH, PSFCH, S-SSB transmission, etc. may be supported in the UCell.

[0112] Unless otherwise specified, the following definitions may apply to terms used in this specification. For example, in this disclosure, unlicensed spectrum and shared spectrum may be interchangeable / substituted. For example, in this disclosure, channel sensing (on a shared spectrum) may refer to channel sensing related to a channel access procedure (CAP). The CAP may include a (channel) sensing step for a resource (or channel) on which transmission is performed.

[0113] Channel: Consists of contiguous RBs in which a channel access procedure is performed in a shared spectrum, and can refer to a carrier or a portion of a carrier.

[0114] -Channel access procedure (CAP): This refers to a procedure for evaluating channel availability based on sensing to determine whether other communication nodes can use the channel before transmitting a signal. The basic unit for sensing is T sl The sensing slot is a 9 us duration. The base station or the terminal senses the channel during the sensing slot, and the power detected for at least 4 us within the sensing slot is equal to or exceeds the energy detection threshold X Thresh If it is smaller, the sensing slot period T sl is considered to be inactive. Otherwise, the sensing slot period T sl = 9us is considered a busy state. CAP can be called LBT (Listen-Before-Talk). For example, CAP (channel access procedure) can include LBT, and for CAP, channel sensing can be performed to monitor the power of the channel during a specific time period (channel sensing period).

[0115] Channel occupancy: refers to corresponding transmissions on channels by a base station / terminal after performing a channel access procedure.

[0116] Channel occupancy time (COT): After a base station / terminal performs a channel access procedure, the base station / terminal and any base stations / terminals sharing the channel occupancy can perform transmissions on the channel. When determining the COT, if the transmission gap is 25us or less, the gap period is also counted in the COT. The COT can be shared for transmissions between the base station and corresponding terminals.

[0117] DL transmission burst: Defined as a set of transmissions from a base station with no gaps exceeding 16 us. Transmissions from a base station separated by gaps exceeding 16 us are considered separate DL transmission bursts. The base station can perform transmissions after the gaps without sensing channel availability within the DL transmission burst.

[0118] UL or SL transmission burst: Defined as a set of transmissions from a terminal without a gap exceeding 16 us. Transmissions from a terminal separated by a gap exceeding 16 us are considered separate UL or SL transmission bursts. The terminal can perform transmissions after the gap without sensing channel availability within the UL or SL transmission burst.

[0119] Discovery burst: refers to a DL transmission burst containing a set of signals and / or channels bounded within a (time) window and associated duty cycle. In an LTE-based system, a discovery burst includes PSS, SSS, and CRS (cell-specific RS) as transmissions disclosed by a base station, and may further include non-zero power CSI-RS. In an NR-based system, a discovery burst includes at least SS / PBCH blocks as transmissions disclosed by a base station, and may further include a CORESET for a PDCCH scheduling a PDSCH with SIB1, a PDSCH carrying SIB1, and / or non-zero power CSI-RS.

[0120] 10 illustrates a method for occupying resources in an unlicensed spectrum according to one embodiment of the present disclosure. The embodiment of FIG. 10 can be combined with various embodiments of the present disclosure.

[0121] As shown in FIG. 10, a communication node (e.g., a base station, a terminal) in an unlicensed band needs to determine whether other communication nodes can use the channel before transmitting a signal. To this end, the communication node in the unlicensed band can perform a channel access procedure (CAP) to access the channel on which the transmissions will be performed. The channel access procedure can be performed based on sensing. For example, a communication node can first perform carrier sensing (CS) before transmitting a signal to check whether other communication nodes will transmit a signal. When it is determined that other communication nodes will not transmit a signal, it is defined that clear channel assessment (CCA) is confirmed. A CCA threshold (e.g., X) that is already defined or set by a higher layer (e.g., RRC) is used to determine whether the channel is available for use by other communication nodes. Thresh), a communication node can determine the channel state as busy if energy higher than the CCA threshold is detected in the channel, and can determine the channel state as idle if not. If the channel state is determined to be idle, the communication node can start signal transmission in the unlicensed band. CAP can be substituted for LBT. For example, CAP (channel access procedure) can include LBT, and for CAP, channel sensing can be performed to monitor the power of the channel during a specific time interval (channel sensing interval).

[0122] Table 6 illustrates the channel access procedures (CAP) supported in NR-U.

[0123] [Table 6]

[0124] As shown in Table 6, LBT types or CAPs for DL / UL / SL transmission can be defined. However, Table 6 is merely an example, and new types or CAPs can be defined in a similar manner. For example, Type 1 (also called Cat-4 LBT) can be a random back-off based channel access procedure. For example, in the case of Cat-4, the contention window may change. For example, Type 2 can be performed in case of COT sharing within COT acquired by a base station or terminal.

[0125] The LBT-SB (Sub Band) (or RB set) will be described below.

[0126] In a wireless communication system supporting unlicensed bands, a cell (or carrier (e.g., CC)) or BWP configured in a terminal can be configured with a wideband having a larger BW (BandWidth) than that of existing LTE. However, the BW required for CCA based on independent LBT operation is limited due to regulations, etc. If a sub-band (SB) on which an individual LBT is performed is defined as an LBT-SB, multiple LBT-SBs are included in one wideband cell / BWP. The RB set constituting the LBT-SB can be configured via higher layer (e.g., RRC) signaling. Therefore, one cell / BWP includes one or more LBT-SBs based on (i) the BW of the cell / BWP and (ii) RB set allocation information.

[0127] 11 illustrates a case where multiple LBT-SBs are included in an unlicensed band according to one embodiment of the present disclosure. The embodiment of FIG. 11 can be combined with various embodiments of the present disclosure.

[0128] As shown in FIG. 11, the BWP of a cell (or carrier) includes multiple LBT-SBs. An LBT-SB can have a bandwidth of, for example, 20 MHz. An LBT-SB is composed of multiple consecutive (P)RBs in the frequency domain, which can be called a (P)RB set. Although not shown, guard bands (GBs) are included between the LBT-SBs. Therefore, the BWP can be configured in the form of {LBT-SB #0 (RB set #0) + GB #0 + LBT-SB #1 (RB set #1 + GB #1) + ... + LBT-SB #(K-1) (RB set (#K-1))}. For convenience, the LBT-SB / RB index can be set / defined so that it increases starting from the lower frequency band and moving towards the higher frequency band.

[0129] CAPC (Channel Access Priority Class) will be explained below.

[0130] The MACCE and CAPC of the radio bearer can be fixed or configured to operate in FR1:

[0131] - Padding BSR (Buffer Status Report) and recommended bit rate MACCE are fixed to the lowest priority;

[0132] -Fixed to the highest priority for SRB0, SRB1, SRB3 and other MACCEs;

[0133] Configured by the base station for SRB2 and DRB.

[0134] When selecting a CAPC for a DRB, the base station takes into account the 5QI of all QoS flows multiplexed into the DRB and considers fairness between other traffic types and transmissions. Table 7 shows which CAPC should be used for a standardized 5QI, i.e., the CAPC to use for a given QoS flow. For standardized 5QI, CAPCs are defined as shown in the table below, and for non-standardized 5QI, the CAPC with the most suitable QoS characteristics should be used.

[0135] [Table 7]

[0136] A method for transmitting a downlink signal via an unlicensed band will be described below. For example, the method for transmitting a downlink signal via an unlicensed band can be applied to a method for transmitting a sidelink signal via an unlicensed band.

[0137] A base station may perform one of the following channel access procedures (CAP) for downlink signal transmission in an unlicensed band:

[0138] (1) Type 1 Downlink (DL) CAP Method

[0139] In Type 1 DL CAP, the length of the time interval spanned by the sensing slots sensed with a break before transmission(s) is random. Type 1 DL CAP can be applied to the following transmissions:

[0140] - transmissions initiated by a base station including (i) a unicast PDSCH with user plane data, or (ii) a unicast PDSCH with user plane data and a unicast PDCCH scheduling the user plane data, or

[0141] - Transmissions announced by the base station, which may include (i) only a discovery burst, or (ii) a discovery burst multiplexed with non-unicast information.

[0142] 12 illustrates a CAP operation for a base station transmitting a downlink signal over an unlicensed spectrum according to one embodiment of the present disclosure. The embodiment of FIG. 12 can be combined with various embodiments of the present disclosure.

[0143] As shown in FIG. 12, the base station is in a far low delay period T d The channel is sensed for the sensing slot period to determine whether it is idle, and if the counter N then becomes 0, transmission can be performed (S134). At this time, the counter N is adjusted by sensing the channel for additional sensing slot periods according to the following procedure:

[0144] Step 1) (S120) N=N init where N init is 0 to CW p , which is a random value evenly distributed between . Then go to step 4.

[0145] Step 2) (S140) If N>0 and the base station chooses to decrement the counter, set N=N-1.

[0146] Step 3) (S150) Sense the channel during the additional sensing slot period. If the additional sensing slot period is a pause (Y), proceed to step 4. If not (N), proceed to step 5.

[0147] Step 4) (S130) If N=0 (Y), end the CAP procedure (S132). Otherwise (N), go to step 2.

[0148] Step 5) (S160) Additional delay period T d If a busy sensing slot is detected within the additional delay period T d Senses the channel until all sensing slots in are detected as idle.

[0149] Step 6) (S170) Additional delay period T d If the channel is sensed as idle during all sensing slots (Y), proceed to step 4. Otherwise (N), proceed to step 5.

[0150] Table 8 applies to CAP according to channel connection priority class. p , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW sizes are different.

[0151] [Table 8]

[0152] As shown in Table 8, the contention window size (CWS) and maximum COT value for each CAPC can be defined. For example, T d =T f +m p *T sl It could be.

[0153] Delay period T d is interval T f (16us)+m p T consecutive sensing slot intervals sl (9us) in that order. T f is the sensing slot period T at the start of the 16us period. sl Includes:

[0154] CW min,p <=CW p <=CW max,p CW p is CW p =CW min,p and can be updated before step 1 (CW size update) based on HARQ-ACK feedback (e.g., ACK or NACK ratio) for the previous DL burst (e.g., PDSCH). p is determined based on the HARQ-ACK feedback for the previous DL burst. min,p It can be initialized to , increased to the next highest allowed value, or left at its existing value.

[0155] (2) Type 2 Downlink (DL) CAP Method

[0156] In Type 2 DL CAP, the length of the time interval spanned by the sensing slots sensed before transmission is deterministic. Type 2 DL CAP is divided into Type 2A / 2B / 2C DL CAP.

[0157] Type 2A DL CAP can be applied to the following transmissions: In Type 2A DL CAP, the base station transmits the data for at least the sensing period T short_dl A transmission can be sent immediately after the channel is sensed quiescent for T = 25us. short_dl is interval T f (=16us) and one sensing slot section immediately following it. f includes a sensing slot at the start of the interval.

[0158] - transmissions announced by a base station, (i) having only a discovery burst, or (ii) having a discovery burst multiplexed with non-unicast information, or

[0159] - Base station transmissions after a 25us gap between terminal transmissions within a shared channel occupancy.

[0160] Type 2B DL ​​CAP is applicable to transmissions performed by the base station after a 16 us gap between transmissions by the terminal within the shared channel occupancy period. In Type 2B DL ​​CAP, the base station f A transmission can be sent immediately after the channel is sensed as idle for T = 16us. f includes a sensing slot within the last 9 us of the interval. Type 2C DL CAP is applicable to transmissions performed by the base station after a maximum 16 us gap between transmissions by the terminal within the shared channel occupancy time. In Type 2C DL CAP, the base station does not sense the channel before performing a transmission.

[0161] In the following, a method for transmitting an uplink signal via an unlicensed band will be described, which can be applied to a method for transmitting a sidelink signal via an unlicensed band.

[0162] The terminal performs Type 1 or Type 2 CAP for uplink signal transmission in an unlicensed band. Typically, the terminal can perform CAP (e.g., Type 1 or Type 2) set by the base station for uplink signal transmission. For example, CAP type indication information for the terminal is included in the UL grant (e.g., DCI format 0_0, 0_1) for scheduling PUSCH transmission.

[0163] (1) Type 1 Uplink (UL) CAP Method

[0164] In Type 1 UL CAP, the length of the time interval spanned by the sensing slots sensed before transmission(s) is random. Type 1 UL CAP can be applied to the next transmission.

[0165] - PUSCH / SRS transmission(s) scheduled and / or configured from the base station

[0166] PUCCH transmissions scheduled and / or configured from the base station

[0167] -RAP (Random Access Procedure) related transmissions (multiple)

[0168] 13 illustrates a Type 1 CAP operation of a terminal for uplink signal transmission according to one embodiment of the present disclosure. The embodiment of FIG. 13 can be combined with various embodiments of the present disclosure.

[0169] As shown in FIG. 13, the terminal is in a far low-delay period (defer duration T d The channel is sensed to determine whether it is idle during the sensing slot period, and if the counter N then becomes 0, transmission can be performed (S234). At this time, the counter N is adjusted by sensing the channel during additional sensing slot periods according to the following procedure:

[0170] Step 1) (S220) N=N init where N init is 0 to CW p , which is a random value evenly distributed between . Then go to step 4.

[0171] Step 2) (S240) If N>0 and the terminal selects to decrement the counter, set N=N-1.

[0172] Step 3) (S250) Sense the channel during the additional sensing slot period. If the additional sensing slot period is a pause (Y), proceed to step 4. If not (N), proceed to step 5.

[0173] Step 4) (S230) If N=0 (Y), end the CAP procedure (S232). Otherwise (N), go to step 2.

[0174] Step 5) (S260) Additional delay period T d If a busy sensing slot is detected within the additional delay period T d Senses the channel until all sensing slots in are detected as idle.

[0175] Step 6) (S270) Additional delay period T d If the channel is sensed in idle for all sensing slots (Y), go to step 4. Otherwise (N), go to step 5.

[0176] Table 9 applies to CAP according to channel connection priority class. p , Min CW, Max CW, Maximum Channel occupancy time (MCOT) and allowed CW sizes are different.

[0177] [Table 9]

[0178] As shown in Table 9, the contention window size (CWS) and maximum COT value for each CAPC can be defined. For example, T d =T f +m p *T sl It could be.

[0179] Delay period T d is interval T f (16us)+m p T consecutive sensing slot intervals sl (9us) in that order. T f is the sensing slot period T at the start of the 16us period. sl Includes:

[0180] CW min,p <=CW p <=CW max,p CW p is CW p =CW min,p and can be updated before step 1 (CW size update) based on explicit / implicit acknowledgement of previous UL bursts (e.g., PUSCH). p Based on the explicit / implicit receive response to the previous UL burst, min,p It can be initialized to , increased to the next highest allowed value, or left at its existing value.

[0181] (2) Type 2 Uplink (UL) CAP Method

[0182] In Type 2 UL CAP, the length of the time interval spanned by the sensing slots, which are used for sensing before transmission(s), is deterministic. Type 2 UL CAP is divided into Type 2A / 2B / 2C UL CAP. In Type 2A UL CAP, the terminal must perform sensing for at least Tshort_dl A transmission can be sent immediately after the channel is sensed quiescent for T = 25us. short_dl is interval T f (=16us) followed immediately by one sensing slot. f The sensing slot is included at the beginning of the period. In Type 2B UL CAP, the terminal starts the sensing period T f A transmission can be sent immediately after sensing the channel is idle for T = 16us. f contains a sensing slot within the last 9 us of the interval. In Type 2C UL CAP, the terminal does not sense the channel before transmitting.

[0183] For example, according to Type 1 LBT-based NR-U operation, a terminal with uplink data to transmit can select a CACP that is mapped to the 5QI of the data, and the terminal can set the parameters of the CACP (e.g., minimum contention window size, max contention window size, m p For example, the UE can select a random value between the minimum CW and the maximum CW mapped to CAPC and then select a backoff counter (BC). In this case, for example, BC can be a positive integer less than or equal to the random value. A UE that senses a channel decreases BC by 1 if the channel is idle. When BC becomes zero and the UE is in T d (T d =T f +m p *T sl If the terminal detects that the channel is idle for a period of time T, it can occupy the channel and attempt to transmit data. sl(=9 usec) is a basic sensing unit or sensing slot, and includes a measurement duration of at least 4 usec. For example, T f (=16usec) 9usec in front of T sl It can be configured as follows.

[0184] For example, according to Type 2 LBT-based NR-U operation, a terminal can perform Type 2 LBT (e.g., Type 2A LBT, Type 2B LBT, Type 2C LBT) within the COT to perform data transmission.

[0185] For example, Type 2A (also called Cat-2 LBT (one shot LBT) or one-shot LBT) can be a 25-usec one-shot LBT. In this case, transmission can begin immediately after idle sensing for at least a 25-usec gap. Type 2A can be used to initiate SSB and non-unicast DL information transmission. That is, the terminal can sense the channel for 25 usec within the COT, and if the channel is idle, the terminal can occupy the channel and attempt data transmission.

[0186] For example, Type 2B can be a 16-usec one-shot LBT. In this case, transmission can start immediately after idle sensing for a 16-usec gap. That is, the terminal can sense the channel for 16 usec within the COT, and if the channel is idle, the terminal can occupy the channel and attempt data transmission.

[0187] 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 may start after a gap of up to 16 usec, i.e., without sensing the channel before the transmission. The duration of the transmission may be up to 584 usec. The terminal may attempt transmission after 16 usec without sensing, and the terminal may perform transmission for up to 584 usec.

[0188] In a sidelink unlicensed band, a terminal can perform a listen before talk (LBT)-based channel access operation. Before connecting to a channel in an unlicensed band, the terminal needs to check whether the access channel is idle (e.g., a state in which the terminal does not occupy the channel, a state in which the terminal can connect to the channel and transmit data) or busy (e.g., a state in which the channel is occupied and data transmission / reception operations are performed on the channel, a terminal attempting to access the channel cannot transmit data when the channel is busy). In other words, the operation of the terminal checking whether the channel is idle or busy can be called clear channel assessment (CCA), and the terminal can check whether the channel is idle or busy during the CCA duration.

[0189] On the other hand, in the next-generation system, a terminal can perform SL transmission and / or reception operations in an unlicensed band. Meanwhile, operation in an unlicensed band can be preceded by a channel sensing operation (e.g., energy detection / measurement) for a channel to be used before the terminal performs transmission in accordance with band-specific regulations or requirements. The terminal can perform transmission to the unlicensed band only when the channel or RB set to be used is determined to be idle (IDLE) according to the channel sensing result (e.g., when the measured energy is equal to or less than a specific threshold), and the terminal can cancel all or part of the transmission to the unlicensed band when the channel or RB set to be used is determined to be busy (BUSY) according to the channel sensing result (e.g., when the measured energy is equal to or greater than a specific threshold).

[0190] On the other hand, when operating in an unlicensed band, the channel sensing operation is omitted or simplified (the channel sensing interval is made relatively small) within a certain time period after the terminal transmits for a specific time period, while after a certain time period has elapsed after transmission, the normal channel sensing operation is performed and then a decision can be made as to whether or not to transmit.

[0191] On the other hand, in transmission in unlicensed bands, depending on regulations or requirements, the time duration and / or frequency occupation area size and / or power spectral density (PSD) of the signal / channel transmitted by the terminal may be above a certain level.

[0192] On the other hand, in the unlicensed band, in order to simplify channel sensing, the channel secured through initial normal channel sensing is informed through COT (channel occupancy time) interval information that the channel will be occupied for a certain period of time, and 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).

[0193] On the other hand, in shared spectrum (eg, unlicensed band), end-to-end transmission (eg, SL transmission) can be performed in a manner that the transmission is carried out over multiple RBs that are spaced apart depending on the standard.

[0194] On the other hand, for uplink channel transmission in a shared spectrum (e.g., an unlicensed band), a terminal may be provided with one or more RB sets and one or more interlaces from the base station, and the final transmission resource may be determined as the intersection of the RBs in the provided RB set and the RBs corresponding to the provided interlaces.

[0195] On the other hand, interlaces are defined in a common RB (CRB) grid, and the index of each interlace can be determined based on the RB offset from CRB#0 in a set of RBs spaced 10 RBs apart at 15 kHz and 5 RBs apart at 30 kHz.

[0196] On the other hand, in the case of UE-to-UE communication (e.g., SL communication), sensing and / or resource (re)selection is performed on a subchannel basis, and therefore, it may be required to express the subchannel in the form of an interlace and / or RB set, which may be advantageous in maximizing reuse of subchannel-based sensing operations and / or resource reservation methods.

[0197] On the other hand, since the interlace structure is not defined at 60 kHz, if terminal-to-terminal transmission and reception (e.g., SL transmission and reception) is based on 60 kHz SCS, a method is required to ensure that the bandwidth size within an occupied channel is a certain ratio (e.g., 80%) or more of the channel size in accordance with the OCB (occupied channel bandwidth) requirements.

[0198] As shown in the embodiments of the present disclosure, the embodiments for 60 kHz SCS can be extended to SCS other than 15 kHz and / or 30 kHz SCS. As shown in the embodiments of the present disclosure, the embodiments for 60 kHz SCS can be extended to 15 kHz and / or 30 kHz SCS.

[0199] On the other hand, if the number of PRBs allocated for terminal-to-terminal transmission (e.g., SL transmission) is significantly increased to meet the OCB and PSD requirements, there may be a shortage of frequency domain resources, especially in the case of terminal-to-terminal physical shared feedback channel (e.g., PSFCH) resources.

[0200] On the other hand, if a small number of PRBs are allocated to satisfy the OCB requirement and positioned at the end of the channel, the total transmission power may be limited according to the PSD requirement.

[0201] On the other hand, the OCB requirement may be temporarily omitted within a COT (Channel Occupancy Time) interval, in which case the occupied channel bandwidth may still need to be greater than and / or equal to 2 MHz.

[0202] On the other hand, a terminal may perform multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions via inter-terminal physical shared feedback channel (e.g., PSFCH) resources present in a single or multiple RB sets, and / or single or multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions may occur in each RB set.

[0203] On the other hand, the number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions that can be simultaneously transmitted to a terminal may be limited, and whether inter-terminal physical shared feedback channel (e.g., PSFCH) transmission is possible may be determined on an RB set basis depending on whether channel sensing (e.g., LBT) for the channel connection procedure succeeds or fails.

[0204] On the other hand, after the channel sensing (eg, LBT) operation for the channel access procedure, there may be insufficient processing time when selecting an inter-UE physical shared feedback channel (eg, PSFCH) resource for actual transmission.

[0205] For example, before performing a channel sensing (e.g., LBT) operation for a channel access procedure for inter-UE physical shared feedback channel (e.g., PSFCH) transmissions, the UE may select some of the multiple inter-UE physical shared feedback channel (e.g., PSFCH) transmissions (based on a priority procedure based on inter-UE priority values ​​(e.g., SL priority values)), and transmit only the corresponding inter-UE physical shared feedback channel (e.g., PSFCH) only if the channel sensing result for the selected inter-UE physical shared feedback channel (e.g., PSFCH) transmission and / or for the RB set to which the inter-UE physical shared feedback channel (e.g., PSFCH) transmission is idle.

[0206] For example, if the channel sensing result (of the corresponding RB set) for the selected UE physical shared feedback channel (e.g., PSFCH) transmission (determined based on the UE priority value (e.g., SL priority value)) is busy, the UE can cancel the UE physical shared feedback channel (e.g., PSFCH) transmission even if the UE physical shared feedback channel (e.g., PSFCH) transmission is selected according to the priority procedure.

[0207] And / or, for example, in the above case, the number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions actually simultaneously transmitted by the terminal may be smaller than the number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions determined based on at least one of the number of scheduled inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions, the maximum number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions of the terminal, and / or the inter-terminal priority value (e.g., SL priority value).

[0208] 14 illustrates a procedure for determining multiple end-to-end physical feedback channels to be transmitted via simultaneous end-to-end physical feedback channel transmissions according to one embodiment of the present disclosure. The embodiment of FIG. 14 can be combined with various embodiments of the present disclosure.

[0209] 14 shows scheduled UE-to-UE physical feedback channel transmissions that feedback transmitting UEs transmitting UE-to-UE physical feedback channels need to transmit. For example, the scheduled UE-to-UE physical feedback channel transmissions are respectively included in a plurality of RB sets. For example, simultaneous transmission of the scheduled UE-to-UE physical feedback channel transmissions may exceed P_MAX, which is the maximum transmit power of the feedback transmitting UEs, and it is therefore necessary to determine at least the UE-to-UE physical feedback channel that is actually transmitted through the simultaneous UE-to-UE physical feedback channel transmissions.

[0210] In step S1410, for example, the feedback transmitting terminal can determine the maximum number of terminal-to-terminal physical feedback channel transmissions based on the priorities associated with the scheduled terminal-to-terminal physical feedback channel transmissions, while reducing scheduled terminal-to-terminal physical feedback channel transmissions with lower priorities (i.e., with the highest priority values), so that the required transmit power does not exceed P_MAX.

[0211] In the present disclosure, it is assumed that the scheduled UE-to-UE physical feedback channel transmissions included in the first to eighth RB sets in Figure 14 are determined from the entire scheduled UE-to-UE physical feedback channel transmissions based on priorities and the maximum transmit power of the feedback transmitting UE. For example, it is assumed here that the priority values ​​(e.g., PSFCH-related priorities) of PRBs included in the sixth RB set and the priority values ​​of PRBs included in the second RB set are all 1 (or, for example, the smallest priority value among the priority values ​​associated with the scheduled UE-to-UE physical feedback channel transmissions included in the determined first to eighth RB sets).

[0212] In step S1420, the feedback transmitting terminal may determine to transmit, via the simultaneous UE-to-UE physical feedback channel transmission, the group of RB sets with the largest number of neighboring RB sets among the sixth RB set including the scheduled physical feedback channel transmission associated with the priority value of 1 and the second RB set. That is, for example, here, the number of RB sets in the neighboring RB set group of the sixth RB set (e.g., the sixth to ninth RB sets) is three, which is greater than the number of RB sets in the neighboring RB set group of the second RB set (e.g., the second and third RB sets), which is two, so the feedback transmitting terminal may determine to perform the scheduled UE-to-UE physical feedback channel transmission included in the neighboring RB set group of the sixth RB set via the simultaneous UE-to-UE physical feedback channel transmission.

[0213] In step S1430, the feedback transmitting terminal may transmit scheduled inter-terminal physical feedback channel transmissions included in an adjacent RB set group of the sixth RB set via the simultaneous inter-terminal physical feedback channel transmissions.

[0214] 15 illustrates a procedure for determining multiple end-to-end physical feedback channels to be transmitted via simultaneous end-to-end physical feedback channel transmissions according to one embodiment of the present disclosure. The embodiment of FIG. 15 can be combined with various embodiments of the present disclosure.

[0215] 15 shows scheduled UE-to-UE physical feedback channel transmissions that need to be transmitted by a feedback transmitting UE that transmits an UE-to-UE physical feedback channel. For example, the scheduled UE-to-UE physical feedback channel transmissions are respectively included in a plurality of RB sets. For example, the scheduled UE-to-UE physical feedback channel transmissions include scheduled UE-to-UE physical feedback channel transmissions that are mapped to a first PRB (physical resource block) and a second PRB whose associated priority value (e.g., PSFCH-related priority value) is 1 (or, for example, the smallest priority value among the priority values ​​associated with the scheduled UE-to-UE physical feedback channel transmissions).

[0216] In step S1510, the feedback transmitting terminal may determine an RB set including an UE-UE physical feedback channel transmission with the smallest priority value (e.g., 1) and its neighboring RB sets from among the RB sets including the scheduled UE-UE physical feedback channel transmission. For example, the feedback transmitting terminal may determine the RB set group with the largest number of neighboring RB sets from among the third RB set including the scheduled physical feedback channel transmission associated with the priority value of 1 and its neighboring RB set group (the third RB set to the fifth RB set) and the first RB set and its neighboring RB set group (the first RB set and the second RB set). That is, for example, since the number of RB sets in the neighboring RB set group (the third RB set to the fifth RB set) of the third RB set is three, which is greater than the number of RB sets in the neighboring RB set group (the first RB set and the second RB set) of the first RB set, the feedback transmitting terminal may determine the neighboring RB set group of the third RB set from among the RB sets including the scheduled UE-UE physical feedback channel transmission.

[0217] Here, it is assumed that the maximum transmit power P_MAX of the feedback transmitting terminal is exceeded when the scheduled UE physical feedback channel transmissions included in the neighboring RB set group of the determined third RB set are simultaneously performed, for example, in this case, it is necessary to determine at least the UE physical feedback channel that is actually transmitted through the simultaneous UE physical feedback channel transmission.

[0218] In step S1520, for example, the feedback transmitting terminal may determine the maximum number of UE-to-UE physical feedback channel transmissions such that the required transmit power does not exceed P_MAX by reducing scheduled UE-to-UE physical feedback channel transmissions with lower priorities (i.e., with the highest priority values) based on priorities associated with scheduled UE-to-UE physical feedback channel transmissions included in an adjacent RB set group of the third RB set. For example, in this embodiment, it is assumed that scheduled UE-to-UE physical feedback channel transmissions mapped to PRBs in the fifth RB set are excluded through the priority-based operation of determining scheduled UE-to-UE physical feedback channel transmissions that are actually performed.

[0219] For example, assume that the total power required for transmitting the final scheduled UE-to-UE physical feedback channel transmission, determined based on the priority-based actually executed scheduled UE-to-UE physical feedback channel transmission decision operation, satisfies P_MAX.

[0220] In step S1530, the feedback transmitting terminal may transmit scheduled inter-terminal physical feedback channel transmissions included in an adjacent RB set group of the third RB set via the simultaneous inter-terminal physical feedback channel transmissions.

[0221] For example, the terminal may perform channel sensing on inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) and / or the RB set to which the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) is / are mapped, and may select inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) associated with an idle RB set as a result.

[0222] For example, the terminal may determine the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) to be finally selected according to a priority procedure based on the terminal-to-terminal priority value (e.g., SL priority value) and / or a transmit power value for the selected terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmission(s), and the terminal may transmit the finally selected terminal-to-terminal physical shared feedback channel (e.g., PSFCH).

[0223] For example, the terminal may set the representative priority value for the idle RB set to the smallest value among the priority values ​​of the UE-to-UE physical shared feedback channel (e.g., PSFCH) transmissions in the RB set, and / or the terminal may include the UE-to-UE physical shared feedback channel (e.g., PSFCH) transmissions in the RB set with the smallest representative priority value in the UE-to-UE physical shared feedback channel (e.g., PSFCH) transmissions that are finally selected.

[0224] For example, after the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) for a specific RB set are selected in the above, if there are any remaining inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions that the terminal can transmit simultaneously and / or if there is remaining transmission power, the terminal can include inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) belonging to the RB set with the next highest priority in the final selected inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s).

[0225] For example, after the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) for a specific RB set are selected, if the number of terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmissions that the terminal can simultaneously transmit is insufficient and / or if there is insufficient remaining transmission power, the terminal may not include the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) for the RB set in the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) to be finally selected.

[0226] For example, in the above, after the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) for a specific RB set are selected, if the number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions that the terminal can simultaneously transmit is insufficient and / or the remaining transmission power is insufficient, the terminal can select some inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) (only the remaining number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions and / or the remaining transmission power) according to a priority procedure based on inter-terminal priority values ​​(e.g., SL priority values) and / or transmission power values ​​for the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission(s) of the RB set.

[0227] For example, the smallest inter-UE priority value (e.g., SL priority value) of the inter-UE physical shared feedback channel (e.g., PSFCH) belonging to the RB set can be selected as the representative inter-UE priority value (e.g., SL priority value) for each RB set.

[0228] For example, a terminal can prioritize transmission of an inter-terminal physical shared feedback channel (eg, PSFCH) of an RB set having the smallest representative inter-terminal priority value (eg, SL priority value).

[0229] For example, if the number of inter-UE physical shared feedback channels (e.g., PSFCH) in the RB set is greater than the maximum number of inter-UE physical shared feedback channel (e.g., PSFCH) transmissions of a terminal, all or some of the inter-UE physical shared feedback channels (e.g., PSFCH) can be selected based on the inter-UE priority value (e.g., SL priority value) to perform actual transmission.

[0230] For example, the target of inter-terminal physical shared feedback channel (eg, PSFCH) transmission can be determined based on the number of inter-terminal physical shared feedback channel (eg, PSFCH) transmissions in an RB set.

[0231] For example, among RB sets having a number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions that is less than the maximum number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions for a terminal, the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission of the RB set with the largest number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions is given priority.

[0232] For example, the terminal may (before the above process) adjust the number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions to be less than the maximum number of inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions according to a prioritization procedure for each RB set of the inter-terminal physical shared feedback channel (e.g., PSFCH) and / or a transmit power allocation procedure (for each RB set).

[0233] For example, the terminal may select an RB set to actually perform UE-to-UE physical shared feedback channel (e.g., PSFCH) transmission from among RB sets that have successfully performed channel sensing (e.g., LBT) for the channel access procedure as close as possible to the maximum number of UE-to-UE physical shared feedback channel (e.g., PSFCH) transmissions.

[0234] For example, when a terminal selects multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions, the terminal may select the interlaces for the multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions to be the same and / or to be in consecutive RB sets.

[0235] For example, the terminal may perform simultaneous transmission of the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) for all or part of the RB set determined based on the priority (smallest priority value) for the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) and the RB set belonging to an adjacent and / or consecutive RB set group.

[0236] For example, the terminal may drop an inter-terminal physical shared feedback channel (e.g., PSFCH) transmission outside a contiguous RB set group to which the RB set to which the inter-terminal physical shared feedback channel (e.g., PSFCH) with the smallest priority value belongs, and / or may determine the transmit power and / or the final number of transmissions to be actually performed for the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission within the contiguous RB set group.

[0237] For example, the terminal may preferentially select a specific RB set group consisting of consecutive RB sets from multiple RB sets for multiple terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmissions, and / or may select priority-based power control and / or a target terminal-to-terminal physical shared feedback channel (e.g., PSFCH) for terminal-to-terminal physical shared feedback channel (e.g., PSFCH) transmissions within the selected specific RB set group.

[0238] For example, the specific RB set group may be an RB set group including an UE-to-UE physical shared feedback channel (e.g., PSFCH) with the smallest priority value. For example, the specific RB set group may have the largest number of configured RB sets. For example, the specific RB set group may have the largest number of UE-to-UE physical shared feedback channels (e.g., PSFCH) to transmit. For example, the specific RB set group may be selected depending on the implementation of the UE. For example, the specific RB set group may include a specific HARQ-ACK feedback option (e.g., unicast and / or groupcast HARQ-ACK feedback option 1). For example, the specific RB set group may be selected by combining the above embodiments.

[0239] For example, a terminal may transmit a specific inter-terminal physical shared feedback channel (e.g., PSFCH) to simultaneously transmit multiple inter-terminal physical shared feedback channels (e.g., PSFCH) belonging to non-contiguous RB sets, thereby ensuring that multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions actually transmitted by the terminal are transmitted in consecutive RB sets. For example, the specific inter-terminal physical shared feedback channel (e.g., PSFCH) transmission may be a dummy signal, an inter-terminal physical shared feedback channel (e.g., PSFCH) transmission for other HARQ-ACK feedback, and / or a common PRB or a common interlace.

[0240] For example, when a terminal transmits multiple inter-terminal physical shared feedback channels (e.g., PSFCHs) belonging to multiple RB sets, if the channel sensing results for some of the multiple RB sets are idle, and / or if the multiple idle RB sets are discontinuous, the terminal can additionally omit inter-terminal physical shared feedback channel (e.g., PSFCH) transmission for some of the discontinuous RB sets (so that the actually transmitted inter-terminal physical shared feedback channels (e.g., PSFCHs) are present in contiguous RB sets).

[0241] For example, the finally transmitted inter-UE physical shared feedback channel (e.g., PSFCH) and / or RB set may include an inter-UE physical shared feedback channel (e.g., PSFCH) with the smallest priority value. For example, the finally transmitted inter-UE physical shared feedback channel (e.g., PSFCH) and / or RB set may correspond to the one with the largest number of RB sets. For example, the finally transmitted inter-UE physical shared feedback channel (e.g., PSFCH) and / or RB set may be the RB set with the largest number of transmitted inter-UE physical shared feedback channels (e.g., PSFCH).

[0242] For example, the terminal may set a higher priority for an inter-terminal physical shared feedback channel (e.g., PSFCH) transmission using a type 2 channel access procedure or an inter-terminal physical shared feedback channel (e.g., PSFCH) transmission within a COT or using a COT than for other inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions.

[0243] For example, the operation may be applied when the inter-UE priorities (e.g., SL priorities) are the same between the inter-UE physical shared feedback channel (e.g., PSFCH) transmissions. For example, the operation may be applied even when the inter-UE priorities (e.g., SL priorities) are different between the inter-UE physical shared feedback channel (e.g., PSFCH) transmissions.

[0244] For example, the terminal may perform a channel sensing operation on each corresponding RB set (multiple RB sets) for multiple inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions, and may preferentially select a specific RB set group consisting of multiple consecutive RB sets for RB sets for which the channel sensing result is idle.

[0245] For example, the terminal may not expect that the PRB sets for the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) resources are (pre)configured to be discontinuous RB sets. For example, the terminal may expect that the PRB sets for the terminal-to-terminal physical shared feedback channel (e.g., PSFCH) resources are (pre)configured to be contiguous RB sets and / or within guard band PRBs between the RB sets.

[0246] For example, for multiple inter-terminal physical shared feedback channel (e.g., PSFCH) occasions corresponding to the same inter-terminal physical shared channel (e.g., PSSCH) resource (slot), if a terminal (successfully) receives an inter-terminal physical shared feedback channel (e.g., PSFCH) for a transmitting inter-terminal physical shared channel (e.g., PSSCH) in a first inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity, the terminal may not use the received inter-terminal physical shared feedback channel (e.g., PSFCH) and its corresponding priority value when determining priority for inter-terminal physical shared feedback channel (e.g., PSFCH) transmission / reception collision in a second inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity.

[0247] Alternatively, for example, if the terminal receives an inter-terminal physical shared feedback channel (e.g., PSFCH) for a transmitting inter-terminal physical shared channel (e.g., PSSCH) (successfully) in first inter-terminal physical shared feedback channel (e.g., PSFCH) opportunities, the terminal may not monitor inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions associated with a priority value for the received inter-terminal physical shared feedback channel (e.g., PSFCH) in subsequent reception opportunities. For example, in the above case, second inter-terminal physical shared feedback channel (e.g., PSFCH) opportunities are located later in time than the first inter-terminal physical shared feedback channel (e.g., PSFCH) opportunities.

[0248] For example, for multiple inter-terminal physical shared feedback channel (e.g., PSFCH) opportunities corresponding to the same inter-terminal physical shared channel (e.g., PSSCH) resource (slot), if a terminal (successfully) transmits an inter-terminal physical shared feedback channel (e.g., PSFCH) for a receiving inter-terminal physical shared channel (e.g., PSSCH) in a first inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity (plurality), the terminal may not use the transmitted inter-terminal physical shared feedback channel (e.g., PSFCH) and the priority value thereof when determining priority for inter-terminal physical shared feedback channel (e.g., PSFCH) transmission / reception and inter-terminal physical shared feedback channel (e.g., PSFCH) transmission / transmission collision in a second inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity (plurality).

[0249] For example, the second inter-UE physical shared feedback channel (e.g., PSFCH) opportunities may be located at a later point in time than the first inter-UE physical shared feedback channel (e.g., PSFCH) opportunities. For example, the second inter-UE physical shared feedback channel (e.g., PSFCH) opportunities may be included at a time similar to the first inter-UE physical shared feedback channel (e.g., PSFCH) opportunities and / or may correspond to different RB sets.

[0250] For example, in the above, the priority of the transmitted inter-terminal physical shared feedback channel (e.g., PSFCH) in the second inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity(s) may be lower than the priority of other untransmitted inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions. That is, even if the priority value of the untransmitted inter-terminal physical shared feedback channel (e.g., PSFCH) is higher than the priority value of the already transmitted inter-terminal physical shared feedback channel (e.g., PSFCH), the priority of the untransmitted inter-terminal physical shared feedback channel (e.g., PSFCH) in the above situation may be higher than the priority of the already transmitted inter-terminal physical shared feedback channel (e.g., PSFCH).

[0251] For example, the untransmitted UE-to-UE physical shared feedback channel (e.g., PSFCH) may be due to a channel sensing (e.g., LBT) failure for the channel access procedure and / or a drop due to UL / SL priority comparison and / or a drop due to UE-to-UE physical shared feedback channel (e.g., PSFCH) transmission / transmission and / or transmission / reception priority comparison.

[0252] For example, an untransmitted UE-to-UE physical shared feedback channel (e.g., PSFCH) due to a channel sensing (e.g., LBT) failure for a channel access procedure may be for the current UE-to-UE physical shared feedback channel (e.g., PSFCH) opportunity point, and / or for previous UE-to-UE physical shared feedback channel (e.g., PSFCH) opportunity points, including the current one.

[0253] For example, when a terminal transmits multiple inter-terminal physical shared feedback channels (e.g., PSFCH) for inter-terminal physical shared feedback channel (e.g., PSFCH) resource sets corresponding to each (reference) inter-terminal physical shared feedback channel (e.g., PSSCH)-to-inter-terminal physical shared feedback channel (e.g., PSFCH) timing in the same inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity, the common PRB and / or common interlace may be shared or the same. That is, when dedicated PRBs (resources on which inter-terminal (e.g., SL) HARQ-ACK information is transmitted) for different (reference) inter-terminal physical shared feedback channel (e.g., PSSCH)-to-inter-terminal physical shared feedback channel (e.g., PSFCH) timings are selected separately for each inter-terminal physical shared feedback channel (e.g., PSFCH) transmission, the common interlace and / or common PRB may be selected and / or exist for each inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity and / or for each RB set.

[0254] For example, when a terminal transmits multiple inter-terminal physical shared feedback channels (e.g., PSFCH) for different (reference) inter-terminal physical shared channel (e.g., PSSCH) to inter-terminal physical shared feedback channel (e.g., PSFCH) timings, a common interlace and / or a common PRB may exist / be assigned separately for each inter-terminal physical shared feedback channel (e.g., PSFCH) transmission.

[0255] For example, when a terminal transmits multiple inter-terminal physical shared feedback channels (e.g., PSFCH) for different (reference) inter-terminal physical shared channel (e.g., PSSCH) to inter-terminal physical shared feedback channel (e.g., PSFCH) timings, the sequences for the common interlace and / or common PRB may be different for each inter-terminal physical shared feedback channel (e.g., PSFCH) transmission and / or may be generated based on a separately (pre-)set ID.

[0256] On the other hand, if common interlace transmission uses the same resources for multiple terminals and the received power for the common PRB is greater than the received power for the dedicated PRB, detection of HARQ-ACK information transmitted via the dedicated PRB may be impossible or inefficient due to the near-far problem.

[0257] For example, when allocating transmit power to a common interlace, the terminal may allocate a transmit power value equal to or smaller than a predefined or (pre)set upper limit value. For example, the transmit power value for the common interlace or its upper limit value may be determined based on the transmit power allocation value for the dedicated PRB (e.g., multiplied by a (pre)set scaling value or ratio value and / or applied with a (pre)set offset value).

[0258] For example, for simultaneous transmission of multiple inter-terminal physical shared feedback channels (e.g., PSFCHs), the terminal may perform power allocation for common interlaces based on a single inter-terminal physical shared feedback channel (e.g., PSFCH) transmission, in which case the reference single inter-terminal physical shared feedback channel (e.g., PSFCH) transmission may correspond to the smallest or largest priority value and / or the smallest amount of transmit power or power allocated to dedicated PRBs.

[0259] As shown in the embodiments of the present disclosure, priority-based operations according to the concepts of the present disclosure can be extended to CAPC-based operations, and / or the inequality signs can be interpreted in reverse when substituted for CAPC.

[0260] In various embodiments of the present disclosure, the method for supporting transmission within a contiguous RB set for an inter-terminal physical shared feedback channel (e.g., PSFCH) can be extended to the method for supporting transmission within a contiguous RB set for an inter-terminal synchronization signal block (e.g., S-SSB). In this case, the priority or the lowest priority value for the inter-terminal physical shared feedback channel (e.g., PSFCH) can be replaced with an operation based on a default inter-terminal synchronization signal block (e.g., S-SSB) or an inter-terminal synchronization signal block (e.g., S-SSB) for a basic resource, or an inter-terminal synchronization signal block (e.g., S-SSB) for synchronization purposes and / or a priority value (the smallest or largest value in the case of multiple priority values) for SL channel transmission adjacent to the inter-terminal synchronization signal block (e.g., S-SSB).

[0261] On the other hand, in inter-terminal communication (e.g., SL communication) mode 1 operation, an inter-terminal physical channel (e.g., PSCCH / PSSCH) transmitting terminal can report to the base station inter-terminal communication (e.g., SL communication) HARQ-ACK feedback information received from an inter-terminal physical channel (e.g., PSCCH / PSSCH) receiving terminal, and if the timing between inter-terminal physical shared feedback channel (e.g., PSFCH) transmissions is variable in inter-terminal physical channel (e.g., PSCCH / PSSCH) transmissions, the method of reporting inter-terminal communication (e.g., SL communication) HARQ-ACK feedback needs to be changed.

[0262] For example, the terminal may transmit an UE communication (e.g., SL communication) HARQ-ACK report to the base station via UL transmission, using the actual UE physical shared feedback channel (e.g., PSFCH) opportunity for the last UE communication (e.g., SL communication) resource indicated via control information (e.g., DCI) and / or the last UE communication (e.g., SL communication) resource within a CG period as a reference point.

[0263] For example, in order for the base station to know when a terminal-to-terminal communication (e.g., SL communication) HARQ-ACK report is transmitted via UL transmission, the base station can indicate terminal-to-terminal physical shared feedback channel (e.g., PSFCH) opportunity information for at least the last terminal-to-terminal communication (e.g., SL communication) resource as control information (e.g., DCI) and / or configure RRC.

[0264] For example, information regarding inter-UE physical shared feedback channel (e.g., PSFCH) opportunities for other inter-UE communication (e.g., SL communication) resources other than the last inter-UE communication (e.g., SL communication) resource may be indicated independently as control information (e.g., DCI) and / or configured via RRC, common information for the last inter-UE communication (e.g., SL communication) resource may be applied, and / or inter-UE communication (e.g., SL communication) resources other than the last inter-UE communication (e.g., SL communication) resource may determine the inter-UE physical channel (e.g., PSCCH / PSSCH) transmitting terminal. For example, in the case of the control information (e.g., DCI) indication method, joint coding with a PUCCH timing indication may be performed.

[0265] For example, the terminal may transmit an UL inter-terminal communication (e.g., SL communication) HARQ-ACK report using a specific inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity candidate for the last inter-terminal communication (e.g., SL communication) resource indicated in the control information (e.g., DCI) and / or the last inter-terminal communication (e.g., SL communication) resource within a CG period as a reference point.

[0266] For example, the specific UE-to-UE physical shared feedback channel (e.g., PSFCH) opportunity candidate may be (pre) set to the most recent or latest UE-to-UE physical shared feedback channel (e.g., PSFCH) opportunity candidate.

[0267] For example, the base station may set / determine a reference point (index of a UE-to-UE physical shared feedback channel (e.g., PSFCH) opportunity) for the time of PUCCH transmission via control information (e.g., DCI) indication and / or RRC configuration and / or (pre)configuration.

[0268] On the other hand, when the timing of the inter-terminal physical shared channel (e.g., PSSCH) to inter-terminal physical shared feedback channel (e.g., PSFCH) is variable, the HARQ-ACK codebook size for inter-terminal communication (e.g., SL communication) HARQ-ACK feedback report also needs to be changed.

[0269] For example, when determining the HARQ-ACK codebook size, the number of candidates for the inter-UE physical shared channel (e.g., PSSCH)-to-inter-UE physical shared feedback channel (e.g., PSFCH) timing is additionally considered. For example, the inter-UE physical shared feedback channel (e.g., PSFCH)-to-PUCCH timing value used when determining the inter-UE communication (e.g., SL communication) HARQ-ACK codebook and its size may be determined as the inter-UE physical shared channel (e.g., PSSCH)-to-inter-UE physical shared feedback channel (e.g., PSFCH) timing, the inter-UE physical shared feedback channel (e.g., PSFCH)-to-PUCCH timing, the initial inter-UE physical shared feedback channel (e.g., PSFCH)-to-actual inter-UE physical shared feedback channel (e.g., PSFCH) timing, and / or a combination thereof.

[0270] For example, the first inter-UE physical shared feedback channel (e.g., PSFCH) timing may be a time point for a first inter-UE physical shared feedback channel (e.g., PSFCH) opportunity determined via a minimum inter-UE physical shared channel (e.g., PSSCH)-to-inter-UE physical shared feedback channel (e.g., PSFCH) timing and / or an inter-UE physical shared feedback channel (e.g., PSFCH) resource period for the inter-UE physical shared channel (e.g., PSSCH), and / or may be an earlier time point among candidates for an inter-UE physical shared channel (e.g., PSSCH)-to-inter-UE physical shared feedback channel (e.g., PSFCH) timing value.

[0271] For example, the actual inter-UE physical shared feedback channel (e.g., PSFCH) timing may be an inter-UE physical shared feedback channel (e.g., PSFCH) opportunity time indicated at least via an inter-UE communication control information (e.g., SCI) indication. For example, the inter-UE physical shared feedback channel (e.g., PSFCH)-to-PUCCH timing value used when determining an inter-UE communication (e.g., SL communication) HARQ-ACK codebook and its size may be substituted for the sum of the initial inter-UE physical shared feedback channel (e.g., PSFCH)-to-actual inter-UE physical shared feedback channel (e.g., PSFCH) timing and the inter-UE physical shared feedback channel (e.g., PSFCH)-to-PUCCH timing, and the inter-UE communication (e.g., SL communication) HARQ-ACK codebook size may be determined based on a candidate value for the sum.

[0272] For example, when determining an inter-UE communication (e.g., SL communication) HARQ-ACK codebook and its size, an inter-UE physical shared feedback channel (e.g., PSFCH) opportunity may be determined for each candidate value of the inter-UE physical shared feedback channel (e.g., PSFCH)-to-PUCCH timing value, and / or again, HARQ-ACK bits for the inter-UE physical shared channel (e.g., PSSCH) opportunity may be generated / determined for each candidate value of the inter-UE physical shared feedback channel (e.g., PSFCH)-to-UE physical shared feedback channel (e.g., PSFCH) timing value in the inter-UE physical shared feedback channel (e.g., PSFCH) opportunity.

[0273] The embodiments of the present disclosure may be limited to be applied when the HARQ-ACK codebook type of terminal-to-terminal communication (eg, SL communication) is semi-static.

[0274] For example, in the semi-static case, the HARQ-ACK bit corresponding to an inter-UE physical shared channel (eg, PSSCH) that is not actually scheduled can be determined / set to NACK or DTX.

[0275] On the other hand, instead of dynamically using the UE physical shared feedback channel (e.g., PSFCH) resources for the purpose of maintaining COT and / or multiple consecutive slot transmission (e.g., MCSt), the UE may transmit a separate signal during the UE physical shared feedback channel (e.g., PSFCH) opportunity.

[0276] For example, within multiple consecutive slot transmissions (e.g., MCSt) (from end-to-end physical shared feedback channel (e.g., PSFCH) opportunities) for subsequent end-to-end communication (e.g., SL communication) channel transmissions, the terminal may attempt channel occupation via the CPE for all or part of the allocated frequency, including the end-to-end physical shared feedback channel (e.g., PSFCH) time resource region and / or the length of the CPE interval for the end-to-end physical shared feedback channel (e.g., PSFCH).

[0277] For example, for inter-UE physical shared feedback channel (e.g., PSFCH) opportunities within multiple consecutive slot transmissions (e.g., MCSt), a UE may prioritize inter-UE physical shared feedback channel (e.g., PSFCH) transmission over inter-UE physical shared feedback channel (e.g., PSFCH) reception. This is because, when inter-UE physical shared feedback channel (e.g., PSFCH) reception is being performed, there is a possibility that inter-UE physical shared feedback channel (e.g., PSFCH) transmission to the UE may not actually occur due to a priority procedure and / or channel sensing (e.g., LBT) failure for a channel access procedure.

[0278] For example, if the inter-terminal physical shared feedback channel (e.g., PSFCH) resource is within the COT (in terms of time and / or frequency) initialized by the terminal and / or is located in the middle of the time of multiple consecutive slot transmissions (e.g., MCSt) of the terminal and is a superset in terms of frequency, overlaps in whole or in part, and / or is within the shared COT (in terms of time and / or frequency) received or utilized by the terminal, the terminal can attempt to transmit the inter-terminal physical shared feedback channel (e.g., PSFCH) in an inter-terminal physical shared feedback channel (e.g., PSFCH) resource (for the purpose of conveying control information) outside the RB set scheduled for the inter-terminal physical shared feedback channel (e.g., PSFCH) transmission.

[0279] For example, an inter-terminal physical shared feedback channel (e.g., PSFCH) transmitted for purposes other than transmitting the control information (e.g., maintaining COT or minimizing the time gap within multiple consecutive slot transmissions (e.g., MCSt)) can be configured with a common PRB and / or a common interlace.

[0280] For example, in the above, the determination of whether to attempt transmission of a UE physical shared feedback channel (e.g., PSFCH) related to COT is limited to be applied when single or multiple UE physical shared feedback channel (e.g., PSFCH) transmissions satisfy COT usage conditions (e.g., CAPC value limitations and / or EDT or maximum transmit power limitations and / or target UEs including COT-initialized UEs).

[0281] For example, the transmission of multiple inter-terminal physical shared feedback channels (e.g., PSFCH) from a terminal is limited to be performed when the power value of each inter-terminal physical shared feedback channel (e.g., PSFCH) or the sum of the power values ​​of the inter-terminal physical shared feedback channels (e.g., PSFCH) in an RB set is equal to or exceeds a certain level (e.g., a (pre)set value).

[0282] And / or, for example, if the power value of each UE physical shared feedback channel (e.g., PSFCH) or the sum of the power values ​​of the UE physical shared feedback channels (e.g., PSFCH) in an RB set is below or less than a certain level, transmission attempts of the UE physical shared feedback channel (e.g., PSFCH) other than for the purpose of transmitting the control information can be omitted.

[0283] For example, if the inter-terminal physical shared feedback channel (e.g., PSFCH) (time and / or frequency) resource is larger than the frequency domain or RB set domain for the COT, the terminal may prioritize or restrict transmission on the inter-terminal physical shared feedback channel (e.g., PSFCH) resource for all or part of the RB set associated with the COT (depending on the above conditions, etc.) and / or prioritize or restrict transmission on the inter-terminal physical shared feedback channel (e.g., PSFCH) resource for all or part of the frequency domain or RB set (for multiple consecutive slot transmissions (e.g., MCSt)) occupied after the inter-terminal physical shared feedback channel (e.g., PSFCH) time resource of the terminal.

[0284] As shown in the embodiments of the present disclosure, channel occupation of an inter-terminal physical shared feedback channel (e.g., PSFCH) resource can be performed when a terminal does not perform an inter-terminal physical shared feedback channel (e.g., PSFCH) transmission operation and / or an inter-terminal physical shared feedback channel (e.g., PSFCH) reception operation in the inter-terminal physical shared feedback channel (e.g., PSFCH) opportunity.

[0285] Various methods of the present disclosure may be applied differently depending on the HARQ-ACK state, HARQ-ACK feedback option, etc. For example, there may be additional priority comparison rules.

[0286] As shown in the embodiments of the present disclosure, various methods can be applied and / or (pre)configured differently depending on whether there is a single or multiple terminal-to-terminal physical shared feedback channel (e.g., PSFCH) opportunity for a terminal-to-terminal physical shared channel (e.g., PSSCH) and / or the number of terminal-to-terminal physical shared feedback channel (e.g., PSFCH) opportunities.

[0287] As shown in the embodiment of the present disclosure, the RB index may be a PRB index or a CRB index.

[0288] As shown in the embodiments of the present disclosure, the methods described for each inter-terminal communication (e.g., SL communication) channel are not limited to the explicitly specified inter-terminal communication (e.g., SL communication) channel, but can be extended and applied to different inter-terminal communication (e.g., SL communication) channels.

[0289] As shown in the embodiments of the present disclosure, various methods can be applied differently depending on the subcarrier spacing size.

[0290] As shown in the embodiments of the present disclosure, various methods can be applied differently depending on the type of end-to-end communication (eg, SL communication) channel.

[0291] As shown in the embodiments of the present disclosure, various methods may be applied differently depending on the CAPC value and / or depending on the end-to-end priority value (eg, end-to-end priority (eg, SL priority) value).

[0292] As shown in the embodiments of the present disclosure, various methods may be applied differently depending on the RB set and / or the size of the RB set and / or whether or not there is a guard band between the RB sets.

[0293] As shown in the embodiments of the present disclosure, the various methods can be applied differently depending on whether it is inside the COT or outside the COT.

[0294] On the other hand, in the unlicensed band, terminal-to-terminal transmission (eg, SL transmission) can also be performed via multiple RBs that are spaced apart depending on the standard.

[0295] On the other hand, for uplink channel transmission in an unlicensed band, the terminal can receive information on a single or multiple RB sets and a single or multiple interlaces from the base station, and can determine the final transmission resource for the traffic portion of the RBs in the provided RB set and the RBs corresponding to the provided interlaces.

[0296] On the other hand, interlaces can be defined in a common RB (CRB) grid, where each interlace can determine an interlace index based on an RB offset based on CRB#0 in a set of RBs arranged at 10 RB intervals at 15 kHz and a set of RBs arranged at 5 RB intervals at 30 kHz.

[0297] On the other hand, in the case of UE-to-UE communication (e.g., SL communication), sensing and / or resource (re)selection is performed on a subchannel basis, and therefore, it is required that the subchannels be expressed in the form of interlaces and / or RB sets, which provides the advantage of maximizing reuse of subchannel-based sensing operations and / or resource reservation methods.

[0298] On the other hand, in unlicensed bands, depending on the standard, terminal-to-terminal transmission (e.g., SL transmission) can be performed by performing all or part of the terminal-to-terminal synchronization signal block (e.g., S-SSB) in an interlaced structure, transmitting via multiple spaced RB groups, or repeatedly transmitting (on the frequency side).

[0299] On the other hand, as a method for satisfying the OCB (occupied channel bandwidth) requirement, an inter-destination synchronization signal block (eg, S-SSB) consisting of 11 RBs can be repeated in the frequency domain.

[0300] On the other hand, in the case of OCB requirements, temporary omission within the COT (Channel Occupancy Time) interval is also possible, in which case the terminal may map a portion of the inter-terminal synchronization signal block (e.g., S-SSB) (e.g., the inter-terminal primary synchronization signal (e.g., S-PSS) and / or the inter-terminal secondary synchronization signal (e.g., S-SSS) and / or the remaining inter-terminal physical broadcast channel (e.g., PSBCH) after the inter-terminal primary synchronization signal (e.g., S-PSS) and the inter-terminal secondary synchronization signal (e.g., S-SSS)) to 11 PRBs, and may map a portion of the inter-terminal synchronization signal block (e.g., S-SSB) (e.g., the inter-terminal primary synchronization signal (e.g., S-PSS) and the inter-terminal physical broadcast channel (e.g., PSBCH) before the inter-terminal secondary synchronization signal (e.g., S-SSS) and / or the entire inter-terminal physical broadcast channel (e.g., PSBCH)) to an interlaced structure, a frequency domain repetition structure, and / or spaced PRB groups.

[0301] On the other hand, if the OCB requirement is temporarily omitted, the bandwidth can still exceed 11 PRBs to be 2 MHz or more, and a portion of the inter-terminal synchronization signal block (e.g., S-SSB) can be repeated in the frequency domain, or the inter-terminal physical broadcast channel (e.g., PSBCH) can support the inter-terminal primary synchronization signal (e.g., S-PSS) and / or the inter-terminal secondary synchronization signal (e.g., S-SSS).

[0302] On the other hand, when a guard RE exists between the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) frequency domain repetitions, the difference in frequency domain and power spectral density (PSD) used between the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) and the inter-terminal physical broadcast channel (e.g., PSBCH) is greater than a certain level, and in the above case, a transient period may exist between the inter-time intervals.

[0303] For example, when a terminal sets a transition point between a previous terminal-to-terminal physical broadcast channel (e.g., PSBCH) symbol and a terminal-to-terminal primary synchronization signal (e.g., S-PSS) and / or terminal-to-terminal secondary synchronization signal (e.g., S-SSS) symbol, the transition point can be specified within the terminal-to-terminal physical broadcast channel (e.g., PSBCH) symbol region.

[0304] For example, when a terminal sets a transition time between an inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol and a subsequent inter-terminal physical broadcast channel (e.g., PSBCH) symbol, the transition time can be specified within the inter-terminal physical broadcast channel (e.g., PSBCH) symbol region.

[0305] For example, when a terminal sets a transition point between a preceding inter-terminal physical broadcast channel (e.g., PSBCH) symbol and an inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol, the terminal can additionally use an inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol to specify the transition point within the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol.

[0306] For example, when a terminal sets a transition time between an inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol and a subsequent inter-terminal physical broadcast channel (e.g., PSBCH) symbol, the terminal can additionally use the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol to specify the transition time within the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol.

[0307] For example, a terminal may use all or part of the lower region guard REs and / or the upper region guard REs for the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) frequency repetition for transmission.

[0308] For example, for an end-to-end synchronization signal block (e.g., S-SSB) frequency repetition, the end-to-end physical broadcast channel (e.g., PSBCH) transmission resource may be used by the end-to-end physical broadcast channel (e.g., PSBCH) transmission resource in whole or in part by the end-to-end synchronization signal block (e.g., S-SSB) frequency repetition, and the PSBCH transmission resource may be mapped to the end-to-end physical broadcast channel (e.g., PSBCH) in a rate-matching manner or a repetition manner. For example, the repetition method may include copying coded symbol values ​​mapped to the frequency domain corresponding to the guard REs of another end-to-end physical broadcast channel (e.g., PSBCH) symbol or an adjacent end-to-end physical broadcast channel (e.g., PSBCH) symbol.

[0309] For example, for an inter-terminal synchronization signal block (e.g., S-SSB) frequency repetition, the terminal may use a specific sequence value for all or part of the guard RE between two consecutive inter-terminal synchronization signal block (e.g., S-SSB) repetitions in the frequency domain, and / or the sequence value may be a sequence designed to reduce the PAPR for an inter-terminal primary synchronization signal (e.g., S-PSS) repetition and / or an inter-terminal secondary synchronization signal (e.g., S-SSS) repetition.

[0310] For example, the sequence mapped to the guard band RE may differ depending on the inter-terminal communication identifier (e.g., SLID) and / or N_ID,2 and / or N_ID,1 values ​​referenced when generating the inter-terminal primary synchronization signal (e.g., S-PSS) sequence and / or the inter-terminal secondary synchronization signal (e.g., S-SSS) sequence.

[0311] For example, in the frequency domain repetition of the inter-terminal primary synchronization signal (e.g., S-PSS) and / or the inter-terminal secondary synchronization signal (e.g., S-SSS), for the start repetition and / or the end repetition (of a continuous frequency repetition bundle on the frequency side), the guard REs in the low frequency domain and / or the guard REs in the high frequency domain of the inter-terminal primary synchronization signal (e.g., S-PSS) and / or the inter-terminal secondary synchronization signal (e.g., S-SSS) may still not be used for transmission.

[0312] On the other hand, when transmitting an inter-terminal synchronization signal block (e.g., S-SSB), the terminal can use a shared COT or an initialized COT, and in this case, the terminal can transmit the inter-terminal synchronization signal block (e.g., S-SSB) without the OCB requirement and / or in a manner that guarantees a frequency domain of 2 MHz or more.

[0313] On the other hand, it is expected that different terminals will use inter-terminal synchronization signal blocks (e.g., S-SSB) in the same resources in an SFN structure, and therefore SFN can be designed to be maximally supported even when different terminals transmit inter-terminal synchronization signal blocks (e.g., S-SSB) in different structures.

[0314] As shown in one embodiment of the present disclosure, temporary OCB exemption operations can be applied differently for each terminal depending on whether the terminal-to-terminal synchronization signal block (e.g., S-SSB) transmission is within the COT interval or outside the COT.

[0315] For example, the inter-terminal synchronization signal block (eg, S-SSB) transmission resources when the OCB exemption is applied may be a subset of the inter-terminal synchronization signal block (eg, S-SSB) transmission resources when the OCB exemption is not applied.

[0316] For example, when transmitting an inter-terminal synchronization signal block (e.g., S-SSB) when the OCB exemption is not applied, it may be possible to map the same coded bits or symbols so that inter-SFNs are transmitted in the inter-terminal synchronization signal block (e.g., S-SSB) transmission resources when the OCB exemption is applied.

[0317] For example, the terminal may perform inter-terminal synchronization signal block (e.g., S-SSB) mapping for basic 11 RBs or inter-terminal synchronization signal block (e.g., S-SSB) mapping for inter-terminal synchronization signal block (e.g., S-SSB) transmission when OCB exemption is applied, and then repeat mapping for the remaining resources or perform rate matching.

[0318] For example, the terminal may perform inter-terminal synchronization signal block (e.g., S-SSB) mapping for inter-terminal synchronization signal block (e.g., S-SSB) transmission when an OCB exemption is not applied, and / or may use the coded bits or symbols of the inter-terminal synchronization signal block (e.g., S-SSB) transmission resource and / or the remaining coded bits excluding the guard REs for transmission when an OCB exemption is applied, and / or may puncture the remainder.

[0319] As shown in the embodiment of the present disclosure, the structure of the inter-terminal synchronization signal block (eg, S-SSB) when the OCB exemption is not applied may be a structure that ensures that the allocated frequency is at least 2 MHz or more.

[0320] For example, for inter-terminal synchronization signal block (e.g., S-SSB) frequency repeated transmission, the number of repetitions, frequency, gap and / or frequency domain can be (pre)set for each inter-terminal physical broadcast channel (e.g., PSBCH), for each inter-terminal primary synchronization signal (e.g., S-PSS), and / or for each inter-terminal secondary synchronization signal (e.g., S-SSS).

[0321] For example, the (pre)configuration can be performed (differently) for inter-terminal synchronization signal block (e.g., S-SSB) transmission within the COT and for inter-terminal synchronization signal block (e.g., S-SSB) transmission outside the COT or when the COT is initialized.

[0322] For example, through (pre)configuration, the number of repetitions and / or frequency gap and / or frequency domain of the terminal-to-terminal physical broadcast channel (e.g., PSBCH) can be determined so as to occupy 80% or more of the BW, and / or the number of repetitions and / or frequency gap and / or frequency domain of the terminal-to-terminal primary synchronization signal (e.g., S-PSS) and / or terminal-to-terminal secondary synchronization signal (e.g., S-SSS) can be determined so as to occupy 80% or more of the BW and / or to occupy a BW of 2 MHz or more.

[0323] For example, bit / symbol mapping coded for end-to-end physical broadcast channel (e.g., PSBCH) repetition resources may be a repetition method and / or rate matching. For example, in the case of end-to-end physical broadcast channel (e.g., PSBCH) transmission using COT, the number of repetitions, frequency gap, and / or frequency domain may be determined through (pre)configuration to satisfy a BW of 2 MHz or more.

[0324] For example, in the frequency domain, the starting position of the inter-terminal synchronization signal block (e.g., S-SSB), the lowest PRB repetition of the lowest inter-terminal synchronization signal block (e.g., S-SSB), the highest PRB repetition of the highest inter-terminal synchronization signal block (e.g., S-SSB), the number of inter-terminal synchronization signal block (e.g., S-SSB) repetitions, and / or the frequency gap between inter-terminal synchronization signal block (e.g., S-SSB) repetitions can be (pre-) set to satisfy 80% or more occupancy of the BW on an inter-terminal physical broadcast channel (e.g., PSBCH) symbol basis.

[0325] For example, in the frequency domain, the start position of the inter-terminal synchronization signal block (e.g., S-SSB), the lowest PRB repetition of the lowest inter-terminal synchronization signal block (e.g., S-SSB), the highest PRB repetition of the highest inter-terminal synchronization signal block (e.g., S-SSB), the number of inter-terminal synchronization signal block (e.g., S-SSB) repetitions, and / or the frequency gap between inter-terminal synchronization signal block (e.g., S-SSB) repetitions can be (pre) set to satisfy 80% or more occupancy of the BW based on the lowest RE position (of the lowest inter-terminal synchronization signal block (e.g., S-SSB) repetition) and the highest RE position (of the highest inter-terminal synchronization signal block (e.g., S-SSB) repetition) to which the actual sequence is mapped, excluding the guard PRB, based on the inter-terminal primary synchronization signal (e.g., S-PSS) and / or inter-terminal secondary synchronization signal (e.g., S-SSS) symbol reference.

[0326] And / or, for example, in the above case, the value of the end-to-end physical broadcast channel (e.g., PSBCH) symbol can be (pre-)configured so that it is still within the RB set. For example, in the above case, for guard PRBs outside the RB set or between the RB sets in the end-to-end physical broadcast channel (e.g., PSBCH) symbol, the end-to-end physical broadcast channel (e.g., PSBCH) mapping can be punctured, and / or the resource can be cut and rate matching can be performed for a specific end-to-end physical broadcast channel (e.g., PSBCH) repetition for resources within the RB set.

[0327] For example, all or part of the repetitions for a portion of an inter-terminal synchronization signal block (e.g., S-SSB) and / or an inter-terminal primary synchronization signal (e.g., S-PSS) and / or an inter-terminal secondary synchronization signal (e.g., S-SSS) and / or an inter-terminal physical broadcast channel (e.g., PSBCH), or some PRBs therefor, may be allowed to be mapped to an inter-RB set guard band PRB.

[0328] On the other hand, the transmitting terminal may apply different pre-coding or phase shift (e.g., for the purpose of reducing PAPR) between frequency-domain inter-terminal synchronization signal block (e.g., S-SSB) repetitions, and in such cases, it may not be appropriate for the receiving terminal to directly combine the frequency-side inter-terminal synchronization signal block (e.g., S-SSB) repetitions to perform sequence detection and / or inter-terminal physical broadcast channel (e.g., PSBCH) decoding.

[0329] For example, a terminal receiving a frequency domain inter-terminal synchronization signal block (e.g., S-SSB) repetition may not perform soft-combining for multiple inter-terminal synchronization signal block (e.g., S-SSB) repetitions. For example, a terminal receiving a frequency domain inter-terminal synchronization signal block (e.g., S-SSB) repetition may perform soft-combining for inter-terminal synchronization signal block (e.g., S-SSB) repetitions in the same RB set and / or may not perform soft-combining between inter-terminal synchronization signal block (e.g., S-SSB) repetitions for different RB sets.

[0330] That is, in the above, not performing soft combining may mean that the terminal performs sequence detection and inter-terminal physical broadcast channel (e.g., PSBCH) decoding for each inter-terminal synchronization signal block (e.g., S-SSB) repetition or repetition group, that different inter-terminal synchronization signal block (e.g., S-SSB) repetitions or repetition groups cannot include each other's channels, and / or that channels can only be included for the same inter-terminal synchronization signal block (e.g., S-SSB) repetition or repetition group.

[0331] For example, the relationship and / or groups of inter-terminal synchronization signal block (e.g., S-SSB) repetitions on which the soft-combining can be performed and / or which can include channels can be (pre-)configured. For example, it can be possible / permitted for a receiving terminal to soft-combine multiple inter-terminal synchronization signal block (e.g., S-SSB) repetitions to perform sequence detection and / or inter-terminal physical broadcast channel (e.g., PSBCH) decoding according to the (pre-)configured value.

[0332] As shown in the embodiments of the present disclosure, the transmission and / or reception of frequency side inter-terminal synchronization signal blocks (e.g., S-SSB) repetitions may be limited to be performed within a specific RB set and / or may be extended to be mapped to multiple RB sets, and / or the methods and combinations of various embodiments of the present disclosure may differ depending on the two cases.

[0333] As shown in the embodiments of the present disclosure, a specific RB set group and / or a specific interlace group can be set (in advance) for each UE communication (e.g., SL communication) BWP and / or for each resource pool, and information regarding the RB set group and / or interlace group, which may be predetermined or selected by the UE, can be indicated (e.g., included in the content or indicated in the UE physical broadcast channel (e.g., PSBCH) DMRS) via the UE physical broadcast channel (e.g., PSBCH).

[0334] As shown in the embodiments of the present disclosure, the RB set group and / or interlace group used for the synchronization signal may differ depending on the sequence seed value, the inter-terminal communication (e.g., SL communication) ID value, and / or the index shift value, because the RB set-interlace group combination suitable from the PAPR perspective may differ.

[0335] For example, inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be preferentially allocated within an RB set in an upward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap, and / or the remaining inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be allocated within an RB set in a downward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap.

[0336] For example, inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be preferentially allocated within an RB set in a downward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap, and / or the remaining inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be allocated within an RB set in an upward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap.

[0337] As shown in the embodiments of the present disclosure, the above method can be applied differently depending on the frequency location of a basic inter-terminal synchronization signal block (eg, S-SSB) in an RB set.

[0338] For example, if the frequency midpoint of the RB set is above the reference, inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be allocated preferentially within the RB set in an upward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap, and / or the remaining inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be allocated within the RB set in a downward direction from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap.

[0339] For example, if the frequency midpoint of the RB set is below the reference, inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be preferentially allocated within the RB set downward from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap, and / or the remaining inter-terminal synchronization signal block (e.g., S-SSB) repetition resources can be allocated within the RB set upward from the basic inter-terminal synchronization signal block (e.g., S-SSB) according to the gap.

[0340] On the other hand, the PRB position for the end-to-end physical control channel (e.g., PSCCH) can be mapped to the lowest subchannel of the lowest RB set for the end-to-end physical shared channel (e.g., PSSCH) assigned to the end-to-end physical control channel (e.g., PSCCH).

[0341] For example, the PRB positions for the UE-to-UE physical control channel (e.g., PSCCH) are mapped sequentially starting from the lowest PRB of the lowest subchannel, and if the subchannel includes a PRB in the guard band between RB sets, the UE-to-UE physical control channel (e.g., PSCCH) mapping can be canceled.

[0342] For example, the PRB positions for the UE-to-UE physical control channel (e.g., PSCCH) are mapped sequentially starting from the lowest PRB of the lowest subchannel, and if the PRB region for the UE-to-UE physical control channel (e.g., PSCCH) overlaps with the PRB of the guard band between RB sets, the UE-to-UE physical control channel (e.g., PSCCH) mapping can be canceled.

[0343] As shown in one embodiment of the present disclosure, the location of the PRBs relative to the end-to-end physical control channel (eg, PSCCH) may vary depending on whether the subchannel includes guard band PRBs.

[0344] For example, if a subchannel includes guard band PRBs, a terminal-to-terminal physical control channel (eg, PSCCH) can be mapped to the remaining PRBs in the subchannel excluding the guard band PRBs.

[0345] For example, in the above, the UE-to-UE physical control channel (e.g., PSCCH) mapping may be discontinuous in the frequency domain. For example, in the above, the UE-to-UE physical control channel (e.g., PSCCH) mapping may be limited to be applied when it is continuous in the frequency domain, and may be mapped only to a specific RB set among multiple overlapping RB sets.

[0346] For example, the specific RB set may be the lowest RB set. For example, the specific RB set may be determined such that the number of PRBs in the RB set and in the subchannel is greater than the number of PRBs in the UE physical control channel (e.g., PSCCH).

[0347] For example, if a subchannel includes guard band PRBs, and / or if the guard band PRBs are located on the higher PRB side of the subchannel, the PRBs of the terminal-to-terminal physical control channel (e.g., PSCCH) can be determined sequentially from the lowest PRB of the subchannel.

[0348] For example, if a subchannel includes guard band PRBs, and / or if the guard band PRBs are located on the lower PRB side of the subchannel, the PRBs of the terminal-to-terminal physical control channel (e.g., PSCCH) can be determined sequentially from the highest PRB of the subchannel.

[0349] For example, in the above case, the terminal may exclude candidate resources having the subchannel (without an end-to-end physical control channel (e.g., PSCCH) resource) as a starting subchannel from the available resource set during the resource (re)selection process. For example, the exclusion process may be performed after the initial available resource set of the terminal is set and / or before resource exclusion for other reserved resources and / or resource exclusion associated with a non-monitored slot. For example, the terminal may not request or perform end-to-end physical control channel (e.g., PSCCH) monitoring for the subchannel.

[0350] For example, for contiguous RB-based transmission, if a subchannel is not confined within a particular RB set, the subchannel can be excluded from the resource pool or excluded from the candidate resources, and / or, in an exception, the excluded subchannel can be used for transmission if the adjacent subchannel is actually allocated.

[0351] Various embodiments of the present disclosure can be applied in the above-mentioned combinations in different ways depending on transmissions within or outside the COT (Channel Occupancy Time). Various embodiments of the present disclosure can be applied in the above-mentioned combinations in different ways depending on the type of COT (e.g., whether it is semi-static or time-varying). Various embodiments of the present disclosure can be applied in the above-mentioned combinations in different ways depending on carriers, whether guards exist between RB sets, or rules.

[0352] As shown in the embodiments of the present disclosure, the method of transmitting synchronization signals and end-to-end physical broadcast channels (e.g., PSBCH) can be applied differently depending on the end-to-end communication (e.g., SL communication) operating region and regulations.

[0353] As shown in the embodiments of the present disclosure, the method of transmitting a synchronization signal and a physical broadcast channel (eg, PSBCH) between terminals can be applied differently depending on the size of the subcarrier spacing.

[0354] As shown in the embodiments of the present disclosure, the method of transmitting synchronization signals and terminal-to-terminal physical broadcast channels (e.g., PSBCH) may be different for each terminal-to-terminal synchronization signal block (e.g., S-SSB) time resource (e.g., sl-SSB-TimeAllocation1, sl-SSB-TimeAllocation2, sl-SSB-TimeAllocation3).

[0355] Embodiments of the present disclosure may vary and / or be (pre)configured by resource pool and / or by transmission outside and / or inside a resource pool and / or by QoS parameters and / or by CAPC and / or by SL priority and / or by COT inside or outside (at COT initialization) and / or by transmission procedure within MCSt and / or by SL channel type and / or by RB set and / or by SL BWP and / or by SL carrier and / or by congestion control level and / or by transmission or reception operation and / or by transmission power level and / or by transmission start time and / or by channel access procedure type for transmission and / or by channel sensing (e.g., LBT) failure rate for channel access procedure and / or by whether the UE is a COT initiator UE, a COT responded UE or other UE and / or by cast type and / or by whether SL HARQ-ACK feedback is activated and / or by HARQ-ACK feedback option and / or by the number of transmission attempts for the same information or TB.

[0356] For example, in various embodiments of the present disclosure, (pre)configuration can be performed per resource pool and / or per transmission outside and / or inside a resource pool and / or per QoS parameter and / or per CAPC and / or per SL priority and / or per COT inside or outside (at COT initialization) and / or per transmission procedure within MCSt and / or per SL channel type and / or per RB set and / or per SL BWP and / or per SL carrier and / or per congestion control level and / or per transmission or reception operation and / or per transmission power level and / or per transmission start time and / or per channel access procedure type for transmission and / or per channel sensing (e.g., LBT) failure rate for channel access procedure and / or per COT initiating UE or COT responding UE or other UE and / or per cast type and / or per SL HARQ-ACK feedback activation status and / or per HARQ-ACK feedback option and / or per number of transmission attempts for the same information or TB.

[0357] For example, in a shared spectrum (e.g., an unlicensed band), a terminal may perform a channel sensing operation (e.g., an LBT operation) related to a channel access procedure to secure a transmission opportunity. For example, the channel sensing operation may be performed on a channel sensing window from a time point prior to the time point of the transmission resource by the length of the channel sensing window, and the transmission may be performed only if the result of the channel sensing is idle.

[0358] For example, occupied channel bandwidth (OCB) and power spectral density (PSD) requirements may need to be met in a shared spectrum. For example, due to OCB requirements, a common interlace (or first interlace) may be used in end-to-end communications over a shared spectrum (e.g., SL-U).

[0359] For example, in a case where a terminal does not support simultaneous transmission of end-to-end physical feedback channels (e.g., PSFCHs) over non-contiguous RB sets in a shared spectrum communication, if the power of the shared PRBs is set high, the coverage of the end-to-end physical feedback channel itself (e.g., end-to-end physical feedback channel transmissions (e.g., PSFCH transmissions) over dedicated PRBs) is limited.

[0360] As shown in one embodiment of the present disclosure, when a terminal performs simultaneous inter-terminal physical feedback channel transmission (e.g., PSFCH transmission), it can determine the PSFCH transmission in the contiguous RB set with the smallest associated inter-terminal communication (e.g., SL communication) priority value as the transmission target.

[0361] That is, the terminal searches for the terminal-to-terminal physical feedback channel transmission (e.g., PSFCH transmission) associated with the lowest priority value among multiple terminal-to-terminal physical feedback channel transmissions (e.g., PSFCH transmission), and can simultaneously perform an RB set including a dedicated PRB on which the terminal-to-terminal physical feedback channel transmission (e.g., PSFCH transmission) is performed and an terminal-to-terminal physical feedback channel transmission (e.g., PSFCH transmission) included in a group of RB sets adjacent to the RB set.

[0362] As shown in one embodiment of the present disclosure, the power for a shared interlace or PRB may be derived by applying an offset to the power value for the dedicated PRB.

[0363] As shown in various embodiments of the present disclosure, this has the effect of allowing a terminal that only supports adjacent RB set transmission and has relatively insufficient capabilities to efficiently perform simultaneous inter-terminal physical feedback channel transmission (e.g., PSFCH transmission) while protecting high priority transmissions.

[0364] Also, for example, as shown in various embodiments of the present disclosure, there is an effect that power for a shared PRB can be efficiently allocated in an operation in which simultaneous inter-terminal physical feedback channel transmission (eg, PSFCH transmission) is performed.

[0365] Furthermore, for example, as shown in various embodiments of the present disclosure, in a shared spectrum in which a RAT different from the RAT with which a terminal communicates is mixed, by enabling adjacent RB set-based communication to be performed, more stable communication can be achieved without being affected by other RATs, and by enabling communication to be performed for a single RB set group, the implementation complexity of the terminal can be reduced.

[0366] As shown in one embodiment of the present disclosure, simultaneous UE-to-UE physical feedback channel transmission / reception operation is provided. For example, in a shared spectrum channel connection-based operation, if a UE does not support UE-to-UE physical feedback channel transmission in a non-adjacent RB set, the UE may select an adjacent RB set including an UE-to-UE physical feedback channel with the smallest priority value for UE-to-UE physical feedback channel transmission.

[0367] For example, in shared spectrum channel connection-based operation, a terminal may attempt to receive terminal-to-terminal physical feedback channels on N terminal-to-terminal physical feedback channel occasions until it detects one terminal-to-terminal physical feedback channel from each terminal that it expects to transmit the terminal-to-terminal physical feedback channel, or (e.g., if it is not possible) the terminal may attempt to receive terminal-to-terminal physical feedback channels on all N terminal-to-terminal physical feedback channel occasions.

[0368] For example, in a shared spectrum channel connection-based operation, when sl-PSFCH-Type is Type 2 and in RB set k, the terminal may determine, in the resource pool, a subset of PRBs in a first interlace, and, based on the sl-PSFCH-RB-SetList, a subset of N^(PSFCH)_(PRBs) in a second interlace for terminal-to-terminal physical feedback channel transmissions including HARQ-ACK information, or, based on the sl-RB-SetPSFCHList, a subset of N^(PSFCH)_PRBs in the resource pool in the second interlace for terminal-to-terminal physical feedback channel transmissions including collision information. The index of the first interlace is provided by sl-PSFCH-Type2-Common interlace.

[0369] For example, the power on the PRBs in the first interlace for end-to-end physical feedback channel transmission may be determined as follows:

[0370]

number

[0371] For example, the power for one PRB in the subset of PRBs in the second interlace for end-to-end physical feedback channel transmission may be determined as follows:

[0372]

number

[0373] Here, for example, P_(PSFCH, offset) is provided by sl-PSFCH-Type2-PowerOffset.

[0374] 16 illustrates a procedure for a first device to perform wireless communication according to one embodiment of the present disclosure. The embodiment of FIG. 16 can be combined with various embodiments of the present disclosure.

[0375] 16 , in step S1610, a first device may determine, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions. In step S6520, the first device may perform a simultaneous inter-device physical feedback channel transmission for at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0376] For example, the first RB set and the at least one first RB set may be used for the simultaneous inter-device physical feedback channel transmission based on the first device not supporting non-contiguous RB sets.

[0377] For example, the at least one second scheduled device-to-device physical feedback channel transmission may be at least one scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions that is included in the first RB set and the at least one first RB set.

[0378] For example, the at least one second scheduled device-to-device physical feedback channel transmission may be determined based on priority among a plurality of third scheduled device-to-device physical feedback channel transmissions, and the plurality of third scheduled device-to-device physical feedback channel transmissions may be a plurality of scheduled device-to-device physical feedback channel transmissions among the plurality of first scheduled device-to-device physical feedback channel transmissions that are included in the first RB set and the at least one first RB set.

[0379] For example, the plurality of first scheduled device-to-device physical feedback channel transmissions may be determined based on a priority among a plurality of second scheduled device-to-device physical feedback channel transmissions.

[0380] For example, among the plurality of first scheduled device-to-device physical feedback channel transmissions, scheduled physical feedback channel transmissions that are not included in the first RB set and the at least one RB set can be dropped.

[0381] For example, the simultaneous device-to-device physical feedback channel transmission may be performed based on a device-to-device physical feedback channel resource, and the device-to-device physical feedback channel resource may include at least one first PRB (physical resource block) included in a first interlace and at least one second PRB included in a second interlace.

[0382] For example, a first transmit power for the at least one first PRB may be determined based on a second transmit power for the at least one second PRB.

[0383] For example, a first transmit power for the at least one first PRB may be determined based on a second transmit power for the at least one second PRB and an offset value.

[0384] For example, the device-to-device physical feedback channel resource may include multiple device-to-device physical feedback channel occasions having the same frequency resource.

[0385] For example, a first inter-device physical feedback channel transmission transmitted in a first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities may be transmitted to a second device, and the second device may not attempt to receive the inter-device physical feedback channel transmission in inter-device physical feedback channel opportunities after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities.

[0386] For example, the frequency resources of the third PRBs included in each of the device-to-device physical feedback channel opportunities and included in the first interlace may be the same.

[0387] For example, the first RB set may be determined based on the fact that the number of RB sets included in a second RB set including a second inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions, and at least one second RB set adjacent to the second RB set, whose associated inter-device communication priority value is the same as that of the first inter-device physical feedback channel transmission, is less than the number of RB sets included in the first RB set and the at least one RB set.

[0388] The above-described embodiments may be applied to various devices described below. For example, the processor 102 of the first device 100 may determine, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions. Then, the processor 102 of the first device 100 may control the transceiver 106 to perform a simultaneous inter-device physical feedback channel transmission for at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions, based on the first RB set and at least one first RB set contiguous to the first RB set.

[0389] According to one embodiment of the present disclosure, a first device for wireless communication is provided. For example, the first device may include: at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations. For example, the operations may include: determining, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having a lowest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions; and performing a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0390] For example, the first RB set and the at least one first RB set may be used for the simultaneous inter-device physical feedback channel transmission based on the first device not supporting non-contiguous RB sets.

[0391] For example, the at least one second scheduled device-to-device physical feedback channel transmission may be at least one scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions that is included in the first RB set and the at least one first RB set.

[0392] For example, the at least one second scheduled device-to-device physical feedback channel transmission may be determined based on priority among a plurality of third scheduled device-to-device physical feedback channel transmissions, and the plurality of third scheduled device-to-device physical feedback channel transmissions may be a plurality of scheduled device-to-device physical feedback channel transmissions among the plurality of first scheduled device-to-device physical feedback channel transmissions that are included in the first RB set and the at least one first RB set.

[0393] For example, the plurality of first scheduled device-to-device physical feedback channel transmissions may be determined based on a priority among a plurality of second scheduled device-to-device physical feedback channel transmissions.

[0394] For example, among the plurality of first scheduled device-to-device physical feedback channel transmissions, scheduled physical feedback channel transmissions that are not included in the first RB set and the at least one RB set can be dropped.

[0395] For example, the simultaneous device-to-device physical feedback channel transmission may be performed based on a device-to-device physical feedback channel resource, and the device-to-device physical feedback channel resource may include at least one first PRB (physical resource block) included in a first interlace and at least one second PRB included in a second interlace.

[0396] For example, a first transmit power for the at least one first PRB may be determined based on a second transmit power for the at least one second PRB.

[0397] For example, a first transmit power for the at least one first PRB may be determined based on a second transmit power for the at least one second PRB and an offset value.

[0398] For example, the device-to-device physical feedback channel resource may include multiple device-to-device physical feedback channel occasions having the same frequency resource.

[0399] For example, a first inter-device physical feedback channel transmission transmitted in a first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities may be transmitted to a second device, and the second device may not attempt to receive the inter-device physical feedback channel transmission in inter-device physical feedback channel opportunities after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities.

[0400] For example, the frequency resources of the third PRBs included in each of the device-to-device physical feedback channel opportunities and included in the first interlace may be the same.

[0401] For example, the first RB set may be determined based on the fact that the number of RB sets included in a second RB set including a second device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions, whose associated device-to-device communication priority value is the same as that of the first device-to-device physical feedback channel transmission, and at least one second RB set adjacent to the second RB set, is less than the number of RB sets included in the first RB set and the at least one RB set.

[0402] According to one embodiment of the present disclosure, an apparatus configured to control a first terminal is provided. For example, the apparatus may include: at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first terminal to perform operations. For example, the operations may include: determining, on a shared spectrum, a first RB set including a first inter-UE physical feedback channel transmission having a smallest associated inter-UE communication priority value among a plurality of first scheduled inter-UE physical feedback channel transmissions; and performing a simultaneous inter-UE physical feedback channel transmission with at least one second scheduled inter-UE physical feedback channel transmission among the plurality of first scheduled inter-UE physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0403] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium having stored thereon instructions may be provided, which, when executed, may cause a first device to: determine, on a shared spectrum, a first RB set including a first inter-device physical feedback channel transmission among a plurality of first scheduled inter-device physical feedback channel transmissions, the first inter-device physical feedback channel transmission having an associated inter-device communication priority value that is lowest; and perform a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

[0404] 17 illustrates a procedure for a second device to perform wireless communication according to one embodiment of the present disclosure. The embodiment of FIG. 17 can be combined with various embodiments of the present disclosure.

[0405] 17, in step S1710, the second device may detect a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum. For example, the first inter-device physical feedback channel transmission may be determined based on the following: the first inter-device physical feedback channel transmission is included in a simultaneous inter-device physical feedback channel transmission; the inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set; and the first RB set includes a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

[0406] For example, the first inter-device physical feedback channel transmission may be received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource, and based on detection of the first inter-device physical feedback channel transmission, no attempt may be made to receive inter-device physical feedback channel transmissions from the first inter-device physical feedback channel opportunity onwards among the plurality of inter-device physical feedback channel opportunities.

[0407] The above-described embodiments may be applied to various devices described below. For example, the processor 202 of the second device 200 may control the transceiver 206 to detect a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum. For example, the first inter-device physical feedback channel transmission may be determined based on the following: the first inter-device physical feedback channel transmission is included in a simultaneous inter-device physical feedback channel transmission, the inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set, and the first RB set includes a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

[0408] According to one embodiment of the present disclosure, a second device for wireless communication is provided. For example, the second device may include: at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an operation. For example, the operation may include: detecting a first inter-device physical feedback channel transmission based on inter-device physical feedback channel resources on a shared spectrum, the first inter-device physical feedback channel transmission being included in a simultaneous inter-device physical feedback channel transmission, the inter-device physical feedback channel resources being included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set, and the first RB set including a first inter-device physical feedback channel transmission having a smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

[0409] For example, the first inter-device physical feedback channel transmission may be received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource, and based on detection of the first inter-device physical feedback channel transmission, no attempt may be made to receive inter-device physical feedback channel transmissions from the first inter-device physical feedback channel opportunity onwards among the plurality of inter-device physical feedback channel opportunities.

[0410] Various embodiments of the present disclosure may be intercombined.

[0411] An apparatus to which various embodiments of the present disclosure are applied will be described below.

[0412] Without being limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or operational flow diagrams disclosed in this document may be applied to various fields requiring wireless communication / connection between devices (e.g., 5G).

[0413] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the following drawings and description, unless otherwise specified, the same reference numerals in the same drawings may represent the same or corresponding hardware blocks, software blocks, or function blocks.

[0414] Figure 18 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of Figure 18 can be combined with various embodiments of the present disclosure.

[0415] 18, a communication system (1) to which various embodiments of the present disclosure are applied includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as communication / wireless / 5G devices. The wireless devices may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI device / server 400. For example, the vehicles may include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of vehicle-to-vehicle communication, etc. Here, the vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone) and / or an aerial vehicle (AV) (e.g., advanced air mobility (AAM)). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop), etc. The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station or a network may be implemented as a wireless device, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0416] Here, the wireless communication technology implemented in the wireless devices 100a to 100f in this specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things (NIT) for low-power communication. Here, for example, NB-IoT technology is an example of Low Power Wide Area Network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-mentioned names. Furthermore, or generally, the wireless communication technology implemented in the wireless devices 100a to 100f in this specification may perform communication based on LTE-M technology. Here, for example, LTE-M technology is an example of LPWAN technology and is referred to by various names such as enhanced Machine Type Communication (eMTC). For example, LTE-M technology may be implemented by 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 above-mentioned names. Additionally, or generally, the wireless communication technology implemented in wireless devices 100a-100f herein may include at least one of ZigBee, Bluetooth (registered trademark), and Low Power Wide Area Network (LPWAN), which are considered low-power communications, but are not limited to the above names. As an example, ZigBee technology is based on various standards such as IEEE 802.15.4 and can create personal area networks (PANs) related to small / low-power digital communications, and is referred to by various names.

[0417] The wireless devices 100a to 100f may be connected to a network 300 via a base station 200. Artificial Intelligence (AI) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to an AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f may communicate with each other via the base station 200 / network 300, or may communicate directly with each other (e.g., sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may communicate directly with each other (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). Furthermore, an IoT device (for example, a sensor) can directly communicate with another IoT device (for example, a sensor) or another wireless device 100a to 100f.

[0418] Wireless communication / connections 150a, 150b, and 150c can be established between the wireless devices 100a to 100f and the base station 200, and between the base stations 200. Here, the wireless communication / connections may be performed via various wireless connection technologies (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, Integrated Access Backhaul (IAB)). Through the wireless communication / connections 150a, 150b, and 150c, wireless devices and base stations, and base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, based on various proposals of the present disclosure, at least some of 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. may be performed.

[0419] 19 illustrates a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 19 can be combined with various embodiments of the present disclosure.

[0420] 19, a first wireless device 100 and a second wireless device 200 may transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR), where {first wireless device 100, second wireless device 200} may correspond to {wireless device 100x, base station 200} and / or {wireless device 100x, wireless device 100x} in FIG.

[0421] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may be configured to control the memory 104 and / or the transceiver 106 to implement 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 / signal and then transmit a wireless signal including the first information / signal via the transceiver 106. The processor 102 may also receive a wireless signal including second information / signal via the transceiver 106 and then store information obtained from signal processing of the second information / signal in the memory 104. The memory 104 may be coupled to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for executing some or all of the processes controlled by the processor 102 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Here, the processor 102 and the memory 104 are part of a communications modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 may be coupled to the processor 102 and may transmit and / or receive wireless signals via one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be referred to as a radio frequency (RF) unit. In this disclosure, a wireless device may also refer to a communications modem / circuit / chip.

[0422] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may additionally include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may be configured to control the memory 204 and / or the transceiver 206 to implement 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 / signal and then transmit a wireless signal including the third information / signal via the transceiver 206. The processor 202 may also receive a wireless signal including fourth information / signal via the transceiver 206 and then store information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 may be coupled to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for executing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Here, the processor 202 and the memory 204 are part of a communications modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 may be coupled to the processor 202 and may transmit and / or receive wireless signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver and may be referred to as an RF unit. In this disclosure, a wireless device may also refer to a communications modem / circuit / chip.

[0423] The hardware elements of the wireless devices 100, 200 will be described in more detail below. Without limitation, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 can generate and provide signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein to the one or more transceivers 106, 206. The one or more processors 102, 202 can receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or operational flow diagrams disclosed herein.

[0424] The one or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software configured to be executed by one or more processors 102, 202, or stored in one or more memories 104, 204 and run by one or more processors 102, 202. 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 collections of instructions.

[0425] One or more memories 104, 204 may be coupled to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. The one or more memories 104, 204 may comprise ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories 104, 204 may be located internal and / or external to the one or more processors 102, 202. The one or more memories 104, 204 may also be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0426] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or operational flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless 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 wireless signals from one or more other devices. Furthermore, one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208 and configured to transmit and receive user data, control information, radio signals / channels, etc., 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 refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received 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 may convert user data, control information, radio signals / channels, etc., processed using one or more processors 102, 202, from baseband signals to RF band signals. To this end, one or more transceivers 106, 206 may include an (analog) oscillator and / or a filter.

[0427] 20 illustrates a signal processing circuit for a transmit signal according to one embodiment of the present disclosure. The embodiment of FIG. 20 can be combined with various embodiments of the present disclosure.

[0428] 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. Without being limited thereto, the operations / functions of FIG. 20 may be performed by the processors 102, 202 and / or the transceivers 106, 206 of FIG. 19. The hardware elements of FIG. 20 may be embodied in the processors 102, 202 and / or the transceivers 106, 206 of FIG. 19. For example, the blocks 1010 to 1060 may be embodied in the processors 102, 202 of FIG. 19. Furthermore, the blocks 1010 to 1050 may be embodied in the processors 102, 202 of FIG. 19, and the block 1060 may be embodied in the transceivers 106, 206 of FIG. 19.

[0429] The codeword can be converted into a radio signal via the signal processing circuit 1000 of FIG. 20. Here, the codeword is an encoded bit sequence of an information block. The information block can include a transmission block (e.g., a UL-SCH transmission block, a DL-SCH transmission block). The radio signal can be transmitted via various physical channels (e.g., a PUSCH, a PDSCH).

[0430] Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence used for scrambling may be generated based on an initialization value, which may include ID information of the wireless device. The scrambled bit sequence may be modulated into a modulation symbol sequence by the modulator 1020. Modulation schemes may include pi / 2-Binary Phase Shift Keying (pi / 2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), etc. The complex modulation symbol sequence may be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbols of each transmission layer may be mapped to corresponding antenna port(s) 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. Here, the precoder 1040 may perform precoding after performing transform precoding (e.g., DFT) on complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0431] The resource mapper 1050 can map modulation symbols for each antenna port to time-frequency resources. The time-frequency resources can include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. The signal generator 1060 generates wireless signals from the mapped modulation symbols, and the generated wireless signals can be transmitted to other devices via each antenna. To this end, the signal generator 1060 can include an inverse fast fourier Transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), a frequency uplink converter, etc.

[0432] In a wireless device, the signal processing process for a received signal may be configured as the inverse of the signal processing processes 1010 to 1060 in FIG. 20. For example, a wireless device (e.g., 100 or 200 in FIG. 19) may receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal may be converted to a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Thereafter, the baseband signal may be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descrambling process. The codeword may be restored to the original information block through decoding. Therefore, a signal processing circuit (not shown) for the received signal may include a signal restorer, a resource demapper, a postcoder, a demodulator, a descrambler, and a decoder.

[0433] 21 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device can be implemented in various forms depending on the use case / service (see FIG. 18). The embodiment of FIG. 21 can be combined with various embodiments of the present disclosure.

[0434] 21, wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 19 and may be configured with 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 a transceiver(s) 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and / or one or more memories 104 and 204 of FIG. 18. For example, the transceiver(s) 114 may include one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 of FIG. 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 overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. In addition, the control unit 120 can transmit information stored in the memory unit 130 to an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or can store information received from an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0435] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Without being limited thereto, the wireless device may be embodied in the form of a robot (100a in FIG. 18), a vehicle (100b-1, 100b-2 in FIG. 18), an XR device (100c in FIG. 18), a mobile device (100d in FIG. 18), a home appliance (100e in FIG. 18), an IoT device (100f in FIG. 18), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a FinTech device (or a financial device), a security device, a climate / environment device, an AI server / device (400 in FIG. 18), a base station (200 in FIG. 18), a network node, etc. The wireless device may be mobile or fixed depending on the use case / service.

[0436] 21, various elements, components, units / sections, and / or modules within the wireless devices 100 and 200 may be interconnected entirely via a wired interface, or at least some of them may 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 may be connected via a wire, and the control unit 120 and a first unit (e.g., 130, 140) may be connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / section, and / or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may be configured as a set of one or more processors. For example, the control unit 120 may be configured as a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 may be composed of a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0437] The embodiment of FIG. 21 will now be described in more detail with reference to other drawings.

[0438] FIG. 22 illustrates a mobile device according to one embodiment of the present disclosure. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), or a portable computer (e.g., a laptop). The mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). The embodiment of FIG. 22 may be combined with various embodiments of the present disclosure.

[0439] 22, portable device 100 may include antenna unit 108, communication unit 110, control unit 120, memory unit 130, power supply unit 140a, interface unit 140b, and input / output unit 140c. Antenna unit 108 may be configured as part of communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 in FIG. 21, respectively.

[0440] The communication unit 110 can transmit and receive signals (e.g., data, control signals, etc.) to and from 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 can include an AP (Application Processor). The memory unit 130 can store data, parameters, programs, codes, and instructions required to operate the portable device 100. The memory unit 130 can also store input / output data / information. The power supply unit 140a supplies power to the portable device 100 and can include a wired / wireless charging circuit, a battery, etc. The interface unit 140b can support connection between the portable device 100 and other external devices. The interface unit 140b can include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit 140c can receive and output video information / signals, audio information / signals, data, and / or information input by a user. The input / output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0441] For example, in the case of data communication, the input / output unit 140c may acquire information / signals (e.g., touch, text, voice, image, video) input by a user, and the acquired information / signals may be stored in the memory unit 130. The communication unit 110 may convert the information / signals stored in the memory into wireless signals and transmit the converted wireless signals directly to another wireless device or to a base station. The communication unit 110 may also receive wireless signals from another wireless device or a base station and restore the received wireless signals to the original information / signals. The restored information / signals may be stored in the memory unit 130 and then output in various forms (e.g., text, voice, image, video, haptic) via the input / output unit 140c.

[0442] 23 illustrates a vehicle or an autonomous vehicle according to an embodiment of the present disclosure. The vehicle or autonomous vehicle may be a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc. The embodiment of FIG. 23 may be combined with various embodiments of the present disclosure.

[0443] 23, a vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 21, respectively.

[0444] The communication unit 110 can transmit and receive signals (e.g., data, control signals, etc.) to and from 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 can include an ECU (Electronic Control Unit). The driving unit 140a can cause the vehicle or autonomous vehicle 100 to travel on the ground. The driving unit 140a can include an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and can include a wired / wireless charging circuit, a 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, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane while driving, a technology for automatically adjusting speed like adaptive cruise control, a technology for automatically driving along a predetermined route, a technology for automatically setting a route and driving when a destination is set, etc.

[0445] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The control unit 120 may control the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. During autonomous driving, the communication unit 110 may non-periodically acquire the latest traffic information data from an external server and acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c may acquire vehicle status and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly acquired data / information. The communication unit 110 may transmit information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server may predict traffic information data in advance using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0446] The claims described herein may be combined in various ways. For example, technical features of method claims herein may be combined and embodied in an apparatus, and technical features of apparatus claims herein may be combined and embodied in a method. Furthermore, technical features of method claims herein and technical features of apparatus claims herein may be combined and embodied in an apparatus, and technical features of method claims herein and technical features of apparatus claims herein may be combined and embodied in a method.

[0447] [Claims at the time of international application] [Claim 1] 1. A method for wireless communication by a first device, comprising: determining, on the shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having an associated inter-device communication priority value lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and The method includes a step of performing a simultaneous device-to-device physical feedback channel transmission for at least one second scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set. [Claim 2] The method of claim 1, wherein the first RB set and the at least one first RB set are used for the simultaneous device-to-device physical feedback channel transmission based on the first device not supporting non-contiguous RB sets. [Claim 3] 2. The method of claim 1, wherein the at least one second scheduled device-to-device physical feedback channel transmission is at least one scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions that is included in the first RB set and the at least one first RB set. [Claim 4] the at least one second scheduled device-to-device physical feedback channel transmission is determined based on a priority among a plurality of third scheduled device-to-device physical feedback channel transmissions; and The method of claim 1, wherein the third scheduled device-to-device physical feedback channel transmissions are a plurality of scheduled device-to-device physical feedback channel transmissions among the first scheduled device-to-device physical feedback channel transmissions that are included in the first RB set and at least one of the first RB sets. [Claim 5] The method of claim 1 , wherein the plurality of first scheduled device-to-device physical feedback channel transmissions are determined based on a priority among a plurality of second scheduled device-to-device physical feedback channel transmissions. [Claim 6] The method of claim 5, wherein among the plurality of first scheduled device-to-device physical feedback channel transmissions, scheduled physical feedback channel transmissions that are not included in the first RB set and the at least one RB set are dropped. [Claim 7] The simultaneous inter-device physical feedback channel transmission is performed based on inter-device physical feedback channel resources; and 2. The method of claim 1, wherein the device-to-device physical feedback channel resources include at least one first physical resource block (PRB) included in a first interlace and at least one second PRB included in a second interlace. [Claim 8] The method of claim 7 , wherein a first transmit power for the at least one first PRB is determined based on a second transmit power for the at least one second PRB. [Claim 9] The method of claim 7 , wherein a first transmit power for the at least one first PRB is determined based on a second transmit power for the at least one second PRB and an offset value. [Claim 10] The method of claim 7, wherein the device-to-device physical feedback channel resource includes a plurality of device-to-device physical feedback channel occasions having the same frequency resource. [Claim 11] a first inter-device physical feedback channel transmission transmitted in a first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities is transmitted to a second device; and The method of claim 10, wherein the second device does not attempt to receive the device-to-device physical feedback channel transmission in device-to-device physical feedback channel opportunities after the first device-to-device physical feedback channel opportunity among the plurality of device-to-device physical feedback channel opportunities. [Claim 12] The method of claim 10, wherein the frequency resources of the third PRBs included in each of the device-to-device physical feedback channel opportunities and included in the first interlace are the same. [Claim 13] The method of claim 1, wherein the first RB set is determined based on the fact that the number of RB sets included in a second RB set including a second inter-device physical feedback channel transmission, among the plurality of first scheduled inter-device physical feedback channel transmissions, and at least one second RB set adjacent to the second RB set, whose associated inter-device communication priority value is the same as that of the first inter-device physical feedback channel transmission, is less than the number of RB sets included in the first RB set and the at least one RB set. [Claim 14] a first device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is determining, on the shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having an associated inter-device communication priority value lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and A first device includes a step of performing a simultaneous inter-device physical feedback channel transmission for at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set. [Claim 15] 1. A device configured to control a first terminal, comprising: at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first terminal to perform an action; The operation is determining a first RB set on a shared spectrum that includes a first inter-UE physical feedback channel transmission having an associated inter-UE communication priority value among a plurality of first scheduled inter-UE physical feedback channel transmissions; and performing a simultaneous end-to-end physical feedback channel transmission for at least one second scheduled end-to-end physical feedback channel transmission among the plurality of first scheduled end-to-end physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set. [Claim 16] A non-transitory computer-readable storage medium having instructions recorded thereon, The instructions, when executed, cause the first device to perform an action; The operation is determining, on the shared spectrum, a first RB set including a first inter-device physical feedback channel transmission having an associated inter-device communication priority value lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and A non-transitory computer-readable storage medium, comprising a step of performing a simultaneous device-to-device physical feedback channel transmission for at least one second scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set. [Claim 17] 1. A method for a second device to communicate wirelessly, comprising: detecting a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum; the first inter-device physical feedback channel transmission is included in a simultaneous inter-device physical feedback channel transmission; The inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set; and A method in which the first RB set is determined based on including a first inter-device physical feedback channel transmission having the smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions. [Claim 18] The first inter-device physical feedback channel transmission is received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource; and The method of claim 17, wherein, based on the detection of the first inter-device physical feedback channel transmission, no attempt is made to receive inter-device physical feedback channel transmissions after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities. [Claim 19] a second device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is detecting a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum; the first inter-device physical feedback channel transmission is included in a simultaneous inter-device physical feedback channel transmission; The inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set; and A second device, wherein the first RB set is determined based on including a first inter-device physical feedback channel transmission having the smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions. [Claim 20] The first inter-device physical feedback channel transmission is received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource; and The second device of claim 19, wherein, based on detection of the first inter-device physical feedback channel transmission, no attempt is made to receive inter-device physical feedback channel transmissions after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities.

Claims

1. 1. A method for wireless communication by a first device, comprising: determining a first RB set on the shared spectrum that includes a first inter-device physical feedback channel transmission having an associated inter-device communication priority value that is lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and The method includes a step of performing simultaneous device-to-device physical feedback channel transmissions with at least one second scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

2. The method of claim 1, wherein the first RB set and the at least one first RB set are used for the simultaneous inter-device physical feedback channel transmission based on the first device not supporting non-contiguous RB sets.

3. 2. The method of claim 1, wherein the at least one second scheduled device-to-device physical feedback channel transmission is at least one scheduled device-to-device physical feedback channel transmission included in the first RB set and the at least one first RB set among the plurality of first scheduled device-to-device physical feedback channel transmissions.

4. the at least one second scheduled device-to-device physical feedback channel transmission is determined based on a priority among a plurality of third scheduled device-to-device physical feedback channel transmissions; and 2. The method of claim 1, wherein the third scheduled device-to-device physical feedback channel transmissions are a plurality of scheduled device-to-device physical feedback channel transmissions included in the first RB set and the at least one first RB set among the first scheduled device-to-device physical feedback channel transmissions.

5. The method of claim 1 , wherein the plurality of first scheduled device-to-device physical feedback channel transmissions are determined based on a priority among a plurality of second scheduled device-to-device physical feedback channel transmissions.

6. The method of claim 5 , wherein among the plurality of first scheduled device-to-device physical feedback channel transmissions, scheduled physical feedback channel transmissions that are not included in the first RB set and the at least one RB set are dropped.

7. The simultaneous inter-device physical feedback channel transmission is performed based on inter-device physical feedback channel resources; and 2. The method of claim 1, wherein the device-to-device physical feedback channel resources include at least one first PRB (physical resource block) included in a first interlace and at least one second PRB included in a second interlace.

8. The method of claim 7 , wherein a first transmit power for the at least one first PRB is determined based on a second transmit power for the at least one second PRB.

9. The method of claim 7 , wherein a first transmit power for the at least one first PRB is determined based on a second transmit power for the at least one second PRB and an offset value.

10. The method of claim 7 , wherein the device-to-device physical feedback channel resource comprises a plurality of device-to-device physical feedback channel occasions having the same frequency resource.

11. a first inter-device physical feedback channel transmission transmitted in a first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities is transmitted to a second device; and 11. The method of claim 10, wherein the second device does not attempt to receive device-to-device physical feedback channel transmissions in device-to-device physical feedback channel opportunities after the first device-to-device physical feedback channel opportunity among the plurality of device-to-device physical feedback channel opportunities.

12. The method of claim 10 , wherein the frequency resources of the third PRBs included in each of the device-to-device physical feedback channel opportunities and included in the first interlace are the same.

13. 2. The method of claim 1, wherein the first RB set is determined based on the fact that the number of RB sets included in a second RB set including a second device-to-device physical feedback channel transmission and at least one second RB set adjacent to the second RB set, which has the same associated device-to-device communication priority value as the first device-to-device physical feedback channel transmission, is less than the number of RB sets included in the first RB set and the at least one RB set.

14. a first device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is determining a first RB set on the shared spectrum that includes a first inter-device physical feedback channel transmission having an associated inter-device communication priority value that is lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and A first device includes a step of performing a simultaneous inter-device physical feedback channel transmission with at least one second scheduled inter-device physical feedback channel transmission among the plurality of first scheduled inter-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

15. 1. An apparatus configured to control a first terminal, comprising: at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first terminal to perform an action; The operation is determining a first RB set on a shared spectrum that includes a first inter-UE physical feedback channel transmission having an associated inter-UE communication priority value among a plurality of first scheduled inter-UE physical feedback channel transmissions; and performing simultaneous end-to-end physical feedback channel transmissions for at least one second scheduled end-to-end physical feedback channel transmission among the plurality of first scheduled end-to-end physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

16. A non-transitory computer-readable storage medium having instructions recorded thereon, the instructions, when executed, cause the first device to perform an action; The operation is determining a first RB set on the shared spectrum that includes a first inter-device physical feedback channel transmission having an associated inter-device communication priority value that is lowest among a plurality of first scheduled inter-device physical feedback channel transmissions; and A non-transitory computer-readable storage medium, comprising: a step of performing simultaneous device-to-device physical feedback channel transmissions with at least one second scheduled device-to-device physical feedback channel transmission among the plurality of first scheduled device-to-device physical feedback channel transmissions based on the first RB set and at least one first RB set contiguous to the first RB set.

17. 1. A method for wireless communication by a second device, comprising: Detecting a first inter-device physical feedback channel transmission based on a shared spectrum inter-device physical feedback channel resource; The first inter-device physical feedback channel transmission is included in simultaneous inter-device physical feedback channel transmission; The inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set; and A method in which the first RB set is determined based on including a first inter-device physical feedback channel transmission having the smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

18. The first inter-device physical feedback channel transmission is received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource; and 18. The method of claim 17, wherein, based on the detection of the first inter-device physical feedback channel transmission, no reception is attempted for inter-device physical feedback channel transmissions after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities.

19. a second device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is detecting a first inter-device physical feedback channel transmission based on an inter-device physical feedback channel resource on a shared spectrum; The first inter-device physical feedback channel transmission is included in simultaneous inter-device physical feedback channel transmission; The inter-device physical feedback channel resource is included in a first resource block (RB) set and at least one first RB set contiguous to the first RB set; and A second device, wherein the first RB set is determined based on including a first inter-device physical feedback channel transmission having the smallest associated inter-device communication priority value among a plurality of first scheduled inter-device physical feedback channel transmissions.

20. The first inter-device physical feedback channel transmission is received based on a first inter-device physical feedback channel opportunity among a plurality of inter-device physical feedback channel opportunities included in the inter-device physical feedback channel resource; and The second device of claim 19, wherein, based on the detection of the first inter-device physical feedback channel transmission, no attempt is made to receive inter-device physical feedback channel transmissions after the first inter-device physical feedback channel opportunity among the plurality of inter-device physical feedback channel opportunities.

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