Method for performing wireless signal transmission, transmission user equipment and storage medium, method for performing wireless signal reception, and reception user equipment and storage medium

Abstract

In the present specification, a transmission UE may determine a candidate resource set in a resource pool, and transmit a physical control channel and an associated physical shared channel in a resource within the candidate resource set. A control information format carried by the physical control channel includes a zone identifier of a destination UE of a transport block associated with the control information format.

Description

Method for performing wireless signal transmission, transmitting user device and storage medium, and method for performing wireless signal reception, receiving user device and storage medium

[0001] This specification relates to wireless communication systems.

[0002] Various devices and technologies, such as machine-to-machine (M2M) communication, machine-type communication (MTC), and smartphones and tablet PCs (personal computers) that require high data transmission rates, are emerging and becoming widespread. Consequently, the amount of data required to be processed on cellular networks is rapidly increasing. To meet this rapidly increasing data processing demand, technologies such as carrier aggregation and cognitive radio are being developed to efficiently utilize more frequency bands, while multi-antenna technology and multi-base station (BS) cooperation technology are being developed to increase the data capacity transmitted within a limited frequency range.

[0003] Wireless communication systems utilize available system resources (e.g., bandwidth, transmission power, etc.) to support communication between user equipment (UEs). With the introduction of new wireless communication technologies, not only has the number of UEs that a base station (BS) must service within a given resource area increased, but so has the volume of data and control information transmitted and received by the BS to and from the UEs it serves. Since the amount of wireless resources available to a BS for communication with UE(s) is finite, a new method is needed for the BS to efficiently receive and transmit uplink / downlink data and / or uplink / downlink control information to / from the UE(s) using these limited wireless resources. In other words, as node density and / or UE density increase, methods for efficiently utilizing high-density nodes or high-density UEs for communication have become necessary. For example, to address the burden on BSs due to rapidly increasing data traffic, direct communication between two or more nearby UEs using wireless communication technologies, bypassing network nodes, has been studied. As the need for V2X (vehicle-to-everything), a communication technology that supports wired and wireless communication between vehicles and other vehicles, infrastructure, networks, or pedestrians, arises, a rapid increase in communication between devices is expected.

[0004] Considering the rapidly increasing volume and frequency of direct communication between devices, a method to stably support direct communication between devices is required.

[0005] The technical tasks that this specification aims to achieve are not limited to the technical tasks mentioned above, and other technical tasks that are not mentioned will be clearly understood by those skilled in the art related to this specification from the detailed description below.

[0006] In one aspect of the present disclosure, a method for performing wireless signal transmission by a transmitting user equipment (UE) in a wireless communication system is provided. The method includes: monitoring slots belonging to a resource pool within a sensing window; determining a candidate resource set for the wireless signal transmission within the resource pool based on the monitored slots; and performing the wireless signal transmission on a first resource within the candidate resource set. Performing the wireless signal transmission includes: transmitting a first physical control channel carrying a first control information format for scheduling a first physical shared channel and the first physical shared channel on the first resource, wherein the first control information format includes a first zone identifier of a destination UE of the wireless signal transmission.

[0007] In another aspect of the present disclosure, a transmitting user equipment (UE) for performing wireless signal transmission in a wireless communication system is provided. The transmitting UE includes: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations include: monitoring slots belonging to a resource pool within a sensing window; determining a candidate resource set for the wireless signal transmission within the resource pool based on the monitored slots; and performing the wireless signal transmission on a first resource within the candidate resource set. Performing the wireless signal transmission includes: transmitting a first physical control channel carrying a first control information format for scheduling a first physical shared channel and the first physical shared channel on the first resource, the first control information format including a first zone identifier of a destination UE of the wireless signal transmission.

[0008] In another aspect of the present disclosure, a computer-readable non-transitory storage medium is provided comprising at least one computer program that causes at least one processor to perform operations. The operations include: monitoring slots belonging to a resource pool within a sensing window; determining a candidate resource set for wireless signal transmission within the resource pool based on the monitored slots; and performing the wireless signal transmission on a first resource within the candidate resource set. Performing the wireless signal transmission includes: transmitting a first physical control channel carrying a first control information format for scheduling a first physical shared channel and the first physical shared channel on the first resource, the first control information format including a first zone identifier of a destination UE of the wireless signal transmission.

[0009] In another aspect of the present disclosure, a method for performing wireless signal reception by a receiving user equipment (UE) in a wireless communication system is provided. The method comprises: performing physical control channel monitoring on a resource pool; and decoding a first physical shared channel within the resource based on detecting a first physical control channel carrying a first control information format from a resource within the resource pool, wherein the control information format includes an identifier of a zone to which the receiving UE belongs.

[0010] In another aspect of the present disclosure, a receiving user equipment (UE) for performing wireless signal reception in a wireless communication system is provided. The receiving UE includes: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations include: performing physical control channel monitoring on a resource pool; and decoding a first physical shared channel within a resource based on detecting a first physical control channel carrying a first control information format on a resource within the resource pool, wherein the control information format includes an identifier of a zone to which the receiving UE belongs.

[0011] In another aspect of the present disclosure, a computer-readable non-transitory storage medium is provided comprising at least one computer program that causes at least one processor to perform operations, the operations comprising: performing physical control channel monitoring on a resource pool; and decoding a first physical shared channel within a resource based on detecting a first physical control channel carrying a first control information format on a resource within the resource pool, the control information format including an identifier of a zone to which the receiving UE belongs.

[0012] In each aspect of the present specification, determining the candidate resource set may include: detecting a second physical control channel carrying a second control information format within the resource pool, the second control information format including a second zone identifier of a destination UE of a second transport block associated with the second control information format; and excluding a second resource, for which the second physical control channel carrying the second control information format is detected, from the candidate resource set based on the first zone identifier in the first control information format being identical to the second identifier in the second control information format.

[0013] In each aspect of the present specification, the second resource, for which the second physical control channel carrying the second control information format is detected, is excluded from the candidate resource set based on the first zone identifier in the first control information format being the same as the second identifier in the second control information format, if: i) the first zone identifier and the second zone identifier are the same, and ii) d_tx_rx - d_tx_rx_itf < d th Based on this, it may include excluding the second resource from the candidate resource set, wherein d_tx_rx is the distance between the transmitting UE and the destination UE of the wireless signal transmission, d_tx_rx_itf is the distance between the transmitting UE of the second physical control channel and the destination UE of the second transport block, and d th is a predetermined threshold value related to distance.

[0014] In each aspect of the present specification, the method by the transmitting UE or the operations related thereto may include: calculating d_tx_rx and d_tx_rx_itf based on an identifier of a zone in which the transmitting UE is located, the first zone identifier, an identifier of a zone in which the transmitting UE of the first physical control channel is located, and the second identifier.

[0015] In each aspect of the present specification, excluding the second resource from the candidate resource set, in which the second physical control channel carrying the second control information format is detected, based on the first zone identifier in the first control information format being identical to the second identifier in the second control information format, may include: excluding the second resource from the candidate resource set based on: i) the first zone identifier and the second zone identifier being identical, and ii) reference signal received power (RSRP) measured based on the first physical control channel being greater than a predetermined threshold associated with RSRP.

[0016] In each aspect of this specification, the first physical shared channel may carry a control information format including a first transport block and an identifier of a zone in which the transmitting UE is located.

[0017] In each aspect of this specification, each of the resources in the resource pool is L subCH It can be a set of consecutive subchannels, L subCH is a predetermined positive integer.

[0018] The above problem solving methods are only some of the examples of this specification, and various examples reflecting the technical features of this specification can be derived and understood by a person having ordinary knowledge in the relevant technical field based on the detailed description below.

[0019] According to some implementations of this specification, wireless communication signals can be transmitted / received efficiently. Accordingly, the overall throughput of a wireless communication system can be increased.

[0020] According to some implementations of this specification, UE-to-UE direct communication technology in licensed spectrum, which is licensed to a specific network operator and can be used exclusively or preferentially by that network operator, may also be utilized in shared spectrum.

[0021] According to some implementations of this specification, UE-to-UE direct communication can be performed efficiently in shared spectrum, which is an unlicensed spectrum that is not licensed to a specific network operator and can be freely used by multiple network operators.

[0022] The effects according to this specification are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art related to this specification from the detailed description below.

[0023] FIG. 1 is an example of a communication system 1 to which implementations of the present specification can be applied;

[0024] FIG. 2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present specification;

[0025] Figure 3 illustrates an example of a frame structure available in a 3GPP-based wireless communication system;

[0026] Figure 4 illustrates a resource grid of slots;

[0027] FIG. 5 illustrates communication links in a wireless communication system;

[0028] FIG. 6 is a diagram illustrating frequency resources and time resources for UE-to-UE direct communication;

[0029] FIG. 7 and FIG. 8 illustrate the transmission structure of physical channels for UE-to-UE direct communication within a slot;

[0030] FIG. 9 is a diagram illustrating an example of resource allocation for UE-to-UE direct communication;

[0031] Figure 10 illustrates the flow of the resource sensing and reservation (RSS) process described above;

[0032] Figure 11 is a diagram illustrating a problem caused by a hidden UE;

[0033] Figure 12 illustrates inter-UE coordination;

[0034] Figure 13 is a diagram illustrating a problem of interference measurement by a transmitting UE;

[0035] Figure 14 illustrates zone identifiers (IDs);

[0036] FIG. 15 illustrates part of the resource sensing and reservation process according to some implementations of this specification;

[0037] FIG. 16 is an example of a process in which a communication device performs wireless signal transmission according to some implementations of the present specification;

[0038] FIG. 17 is an example of a process by which a communication device performs wireless signal reception according to some implementations of the present specification.

[0039] Hereinafter, implementations according to this specification will be described in detail with reference to the attached drawings. The detailed description provided below, together with the attached drawings, is intended to describe exemplary implementations of this specification and is not intended to represent the only possible implementations of this specification. The detailed description below includes specific details to provide a thorough understanding of this specification. However, one of ordinary skill in the art will appreciate that this specification may be practiced without these specific details.

[0040] In some cases, to avoid ambiguity in the concepts of this specification, known structures and devices may be omitted or illustrated in block diagram form focusing on the core functions of each structure and device. Furthermore, identical components are described using the same drawing reference numerals throughout this specification.

[0041] The techniques, devices, and systems described below can be applied to various wireless multiple access systems.

[0042] For convenience of explanation, the following description is based on a 3rd Generation Partnership Project (3GPP)-based communication system. However, the technical features of this specification are not limited thereto. For example, although the detailed description below is based on 3GPP (3rd Generation Partnership Project) LTE or 5G technology, some implementations of this specification are applicable to any other mobile communication system and systems to be introduced in the future (e.g., 6G), except for those specific to 3GPP LTE / 5G.

[0043] For terms and technologies used in this specification that are not specifically explained, refer to 3GPP-based standard documents, for example, 3GPP TS 23.304, 3GPP TS 23.285, 3GPP TS 23.287, 3GPP TS 24.587, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.300, 3GPP TS 36.321, 3GPP 36.322, 3GPP TS 36.323, 3GPP TS and 3GPP TS 36.331, 3GPP TS 37.213, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.322, 3GPP TS 38.323, and 3GPP TS 38.331.

[0044] In the examples of this specification described below, the expression "assumes" that a device "assumes" that the entity transmitting the channel transmits the channel in a manner consistent with the "assume." The entity receiving the channel may mean that, under the assumption that the channel was transmitted in a manner consistent with the "assume," the entity receiving the channel receives or decodes the channel in a manner consistent with the "assume."

[0045] In this specification, UE may be fixed or mobile, and includes various devices that communicate with a BS (base station, BS) to transmit and / or receive user data and / or various control information. UE may be referred to as (Terminal Equipment), MS (Mobile Station), MT (Mobile Terminal), UT (User Terminal), etc. In addition, in this specification, BS generally refers to a fixed station that communicates with UE and / or other BSs, and exchanges various data and control information by communicating with UE and other BSs. BS may be referred to by other terms such as ABS (Advanced Base Station), NB (Node-B), eNB (evolved-NodeB), gNB, BTS (Base Transceiver System), Access Point, PS (Processing Server), etc. For convenience of explanation, base stations are collectively referred to as BSs regardless of the type or version of communication technology.

[0046] In this specification, a node refers to a fixed point capable of transmitting and receiving wireless signals by communicating with a UE. Various types of BSs can be used as nodes, regardless of their designation. Each node is equipped with at least one antenna. The antenna may refer to a physical antenna, an antenna port, a virtual antenna, or an antenna group. A node is also referred to as a point.

[0047] Meanwhile, 3GPP-based communication systems use the concept of cells to manage wireless resources. Cells associated with wireless resources are distinct from cells within a geographic area. A "cell" within a geographic area can be understood as the coverage within which a node can provide services using a carrier, while a "cell" within a wireless resource is associated with a bandwidth (BW), which is the frequency range configured by the carrier. Downlink coverage, the range within which a node can transmit valid signals, and uplink coverage, the range within which a node can receive valid signals from a UE, depend on the carrier carrying the signals. Therefore, the coverage of a node is often associated with the coverage of the "cell" within which the wireless resources are used. Therefore, the term "cell" can sometimes refer to the coverage of a service provided by a node, sometimes to a wireless resource, and sometimes to the range within which a signal using the wireless resource can reach with effective intensity.

[0048] A "cell" associated with wireless resources can be defined as a combination of downlink resources (DL resources) and uplink resources (UL resources), i.e., a combination of a DL component carrier (CC) and an UL CC. A cell can be configured with only DL resources or a combination of DL resources and UL resources. When carrier aggregation is supported, the linkage between the carrier frequency of the DL resources (or DL ​​CC) and the carrier frequency of the UL resources (or UL CC) can be indicated by system information. Here, the carrier frequency can be the same as or different from the center frequency of each cell or CC.

[0049] In a wireless communication system, a UE receives information from a base station (BS) via the downlink (DL), and the UE transmits information to the base station via the uplink (UL). The information transmitted and / or received by the BS and UE includes data and various control information, and various physical channels exist depending on the type and purpose of the information they transmit and / or receive.

[0050] 3GPP-based communication standards define downlink physical channels corresponding to resource elements that carry information originating from higher layers, and downlink physical signals corresponding to resource elements that are used by the physical layer but do not carry information originating from higher layers. For example, the physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), and physical downlink control channel (PDCCH) are defined as downlink physical channels, and reference signals and synchronization signals are defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, refers to a signal with a predefined special waveform that is known to the BS and UE. For example, the demodulation reference signal (DMRS) and the channel state information RS (CSI-RS) are defined as downlink reference signals. 3GPP-based communication standards define uplink physical channels corresponding to resource elements that carry information originating from higher layers, and uplink physical signals corresponding to resource elements that are used by the physical layer but do not carry information originating from higher layers.For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are defined as uplink physical channels, and a demodulation reference signal (DMRS) for uplink control / data signals and a sounding reference signal (SRS) used for uplink channel measurement are defined.

[0051] In this specification, PDCCH refers to a set of time-frequency resources (e.g., resource elements (REs)) that carry downlink control information (DCI), and PDSCH refers to a set of time-frequency resources that carry downlink data. In addition, PUCCH, PUSCH, and PRACH refer to sets of time-frequency resources that carry uplink control information (UCI), uplink data, and random access preamble, respectively (respectively). Hereinafter, the expression that a UE / BS transmits / receives a PUCCH / PUSCH / PRACH is used with the same meaning as that a UE / BS transmits / receives UCI / uplink data / random access preamble on or through a PUCCH / PUSCH / PRACH, respectively. Additionally, the expression that BS / UE transmits / receives PBCH / PDCCH / PDSCH is used with the same meaning as transmitting / receiving broadcast information / DCI / downlink data on or through PBCH / PDCCH / PDSCH, respectively.

[0052] In this specification, radio resources (e.g., time-frequency resources) scheduled or configured by the BS to the UE for transmission or reception of PUCCH / PUSCH / PDSCH are also referred to as PUCCH / PUSCH / PDSCH resources.

[0053] Since a communication device receives physical channels and / or physical signals in the form of radio signals on a cell, it cannot selectively receive only radio signals containing only a specific physical channel or a specific physical signal through a radio frequency (RF) receiver, nor can it selectively receive only radio signals excluding only a specific physical channel or a specific physical signal through an RF receiver. In actual operation, the communication device first receives radio signals on a cell through an RF receiver, converts the radio signals, which are RF band signals, into baseband signals, and decodes the physical signals and / or physical channels within the baseband signals using one or more processors. Therefore, in some implementations of the present specification, not receiving a physical signal and / or a physical channel may not actually mean that the communication device does not receive radio signals containing the physical signal and / or physical channel at all, but rather does not attempt to recover the physical signal and / or physical channel from the radio signals, for example, does not attempt to decode the physical signal and / or the physical channel.

[0054] Figure 1 is an example of a communication system 1 to which implementations of the present specification can be applied.

[0055] Referring to FIG. 1, the communication system (1) applicable to this specification includes a wireless device, a BS, and a network. Here, the wireless device may refer to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (e.g., E-UTRA), WiFi, or 6G to be introduced in the future).

[0056] Although not limited thereto, the wireless devices may include a robot (100a), a vehicle (100b-1, 100b-2, 100b-3, 100b-4), an XR (eXtended Reality) device (100c), a hand-held 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 a ground vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing communication between vehicles, etc. Here, the vehicles may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and an Urban Air Mobility (UAM) (e.g., an unmanned aerial vehicle). The XR devices may include an AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) device. Mobile devices may include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors, smart meters, and the like. For example, BSs and networks can also be implemented using wireless devices, and a specific wireless device may act as a BS / network node for other wireless devices.

[0057] Wireless devices (100a to 100f) can be connected to a network through a BS (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) through a network. The wireless devices (100a to 100f) can communicate with each other through the BS (200) / network, but can also communicate directly (e.g., sidelink communication) without going through the BS / network. For example, the vehicles (100b-1, 100b-2, 100b-3, 100b-4) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Additionally, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0058] Wireless communication / connection can be established between wireless devices (100a~100f) / BS(200) - BS(200) / wireless devices (100a~100f). Here, the wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) for uplink / downlink communication (UL / DL) and sidelink communication (SL) (or D2D communication). Through the wireless communication / connection (UL / DL, SL), the wireless device and the BS / wireless device can transmit / receive wireless signals to / from each other. To this end, 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.), and resource allocation processes can be performed based on various proposals of this specification.

[0059] FIG. 2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present specification. Referring to FIG. 2, a first wireless device (100) and a second wireless device (200) can transmit and / or receive wireless signals via various wireless access technologies. Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the BS (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 1.

[0060] Each of the first wireless device (100) and the second wireless device (200) includes one or more processors (102, 202) and one or more memories (104, 204), and may further include one or more transceivers (106, 206) and / or one or more antennas (108). The processors (102, 202) control the memories (104, 204) and / or the transceivers (106, 206), and may be configured to implement the functions, procedures, and / or methods described / suggested below. For example, the processors (102, 202) may process information in the memories (104, 204) to generate first information / signals, and then transmit a wireless signal including the first information / signals via the transceivers (106, 206). In addition, the processor (102, 202) may receive a wireless signal including second information / signal through the transceiver (106, 206), and then store information obtained from signal processing of the second information / signal in the memory (104, 204). The memory (104, 204) may be connected to the processor (102, 202) and may store various information related to the operation of the processor (102, 202). For example, the memory (104, 204) may perform some or all of the processes controlled by the processor (102, 202), or store software code including commands for performing the procedures and / or methods described / proposed below. Here, the processor (102, 202) and the memory (104, 204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology. A transceiver (106, 206) may be connected to a processor (102, 202) and may transmit and / or receive wireless signals via one or more antennas (108, 208). The transceiver (106, 206) may include a transmitter and / or a receiver.

[0061] Although not limited thereto, 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 a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). 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 functions, procedures, proposals, and / or methods disclosed in this specification. One or more processors (102, 202) may generate messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this specification. One or more processors (102, 202) may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this specification, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) may receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in this specification.

[0062] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the functions, procedures, proposals, and / or methods disclosed in this specification may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The functions, procedures, proposals, and / or methods disclosed in this specification may be implemented using firmware or software in the form of codes, instructions, and / or sets of instructions.

[0063] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories (104, 204) may be located internally and / or externally to one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0064] One or more transceivers (106, 206) may transmit / receive user data, control information, wireless signals / channels, etc., referred to in the methods and / or flowcharts of this specification, to / from one or more other devices. Furthermore, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit / receive user data, control information, or wireless signals to / from one or more other devices. Furthermore, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and / or receive user data, control information, wireless signals / channels, etc., referred to in the functions, procedures, proposals, methods, and / or flowcharts of this specification, via one or more antennas (108, 208). In this specification, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) may convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202). One or more transceivers (106, 206) may convert processed user data, control information, wireless signals / channels, etc. from baseband signals to RF band signals using one or more processors (102, 202). For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or a filter.

[0065] In this specification, at least one memory (104, 204) can store instructions or programs, which, when executed, cause at least one processor (102, 202) operably connected to the at least one memory to perform operations according to some embodiments or implementations of the present specification.

[0066] In this specification, a computer-readable (non-transitory) storage medium can store at least one instruction or computer program, which when executed by at least one processor causes the at least one processor to perform operations according to some embodiments or implementations of the present specification.

[0067] Figure 3 illustrates an example of a frame structure available in a 3GPP-based wireless communication system.

[0068] The structure of the frame in FIG. 3 is merely an example, and the number of subframes, slots, and symbols in the frame may vary. In some wireless communication systems, OFDM numerologies (e.g., subcarrier spacing (SCS)) may be set differently between multiple cells aggregated to a single UE. Accordingly, the (absolute time) duration of a time resource (e.g., subframe, slot, or transmission time interval (TTI)) composed of the same number of symbols may be set differently between the aggregated cells. Here, the symbol may include an OFDM symbol (or a cyclic prefix - orthogonal frequency division multiplexing (CP-OFDM) symbol), an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol). In this specification, the terms symbol, OFDM-based symbol, OFDM symbol, CP-OFDM symbol and DFT-s-OFDM symbol may be interchangeable.

[0069] Referring to Figure 3, uplink and downlink transmissions are organized into frames. Each frame is T f = (△f max *N f / 100)*T c = 10 ms duration, where T is the basic time unit. c = 1 / (△f max *N f ) and △f max = 480*10 3 Hz, and N f =4096. For reference, the sampling time T s = 1 / (△f ref *Nf,ref ) and △f ref = 15*10 3 Hz, and N f,ref =2048. T s Wow T c is a constant κ = T s / T c = 64 relationship. A frame consists of 10 subframes, and the duration of a single subframe is T. sf is 1ms. Subframes are further divided into slots, and the number of slots in a subframe depends on the subcarrier spacing. Each slot is divided into N slots based on a cyclic prefix (CP). slot symb It can be composed of symbols. For example, in some scenarios, in the case of normal CP, each slot consists of 14 OFDM symbols, and in the case of extended CP, each slot consists of 12 OFDM symbols. The numerology is exponentially scalable with subcarrier spacing △f = 2. u *Depends on 15 kHz. The following table shows the subcarrier spacing for regular CP △f = 2. u *Number of OFDM symbols per slot at 15 kHz (N) slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is shown.

[0070]

[0071] The following table shows the subcarrier spacing for extended CP △f = 2. u *Indicates the number of OFDM symbols per slot, the number of slots per frame, and the number of slots per subframe at 15 kHz.

[0072]

[0073] For a subcarrier spacing setting u, slots are n in increasing order within a subframe. u s ∈ {0, ..., nsubframe,u slot - 1} and n in increasing order within the frame u s,f ∈ {0, ..., n frame,u slot - Numbered as 1}.

[0074] Hereinafter, implementations of this specification are described by referring to the minimum unit of time for scheduling uplink, downlink, and sidelink transmissions as a slot. However, depending on the wireless communication system, the minimum unit of time for scheduling may be referred to by a different term. For example, in an LTE-based system, the minimum unit of time for scheduling transmissions is referred to as a subframe or a transmission time interval (TTI), whereas in an NR-based system, the minimum unit of time for scheduling is referred to as a slot.

[0075] Figure 4 illustrates a resource grid of slots. A slot is a multiple (e.g., N) in the time domain. slot symb ) contains symbols of each numeral (e.g., subcarrier spacing) and carrier, a common resource block (CRB)N indicated by higher layer signaling (e.g., radio resource control (RRC) signaling). start,u grid Starting from,N size,u grid,x *N RB sc Dog subcarriers and N subframe,u symb A resource grid of OFDM symbols is defined, where N size,u grid,xis the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for downlink and UL for uplink. N RB sc is the number of subcarriers per RB, and in 3GPP-based wireless communication systems, N RB sc is typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL), there is one resource grid. The carrier bandwidth N for subcarrier spacing configuration u size,u grid is given to the UE by higher layer parameters (e.g., RRC parameters) from the network. Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and one complex-valued symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l indicating the symbol position relative to a reference point in the time domain. RBs can be classified into common resource blocks (CRBs) and physical resource blocks (PRBs). CRBs are numbered upwards from 0 in the frequency domain for subcarrier spacing configuration u. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u coincides with 'point A', which is a common reference point for resource block grids. PRBs for subcarrier spacing configuration u are defined in a bandwidth part (BWP), numbered from 0 to N. size,u BWP,i -1, where i is the number of the bandwidth part. Common resource block n u CRB and bandwidth part i within physical resource block n PRB The relationship between the two is as follows: nu PRB = n u CRB +N start,u BWP,i , here N start,u BWP,i is a common resource block (BRB) whose bandwidth part starts relative to CRB 0. A BWP comprises multiple contiguous RBs in the frequency domain. For example, a BWP may be a given numeral u within a BWP i on a given carrier. i A subset of contiguous CRBs defined for a carrier. A carrier may contain up to N (e.g., 5) BWPs. A UE may be configured to have one or more BWPs on a given component carrier. Data communication is performed through the activated BWPs, and only a predetermined number (e.g., 1) of BWPs configured for the UE may be activated on the carrier.

[0076] For each BWP, the UE may be provided with at least one of the following parameters for the serving cell: i) subcarrier spacing, ii) cyclic prefix, iii) N start BWP = Offset RB with the assumption of 275 set and length L RB CRBN provided by the RRC parameter locationAndBandwidth, which indicates the resource indicator value (RIV). start BWP =O carrier +RB start and the number of contiguous RBsN size BWP =L RB , and the subcarrier spacing is provided by the RRC parameter offsetToCarrierO carrier; an index within the set of DL BWPs or UL BWPs; a set of BWP-common parameters and a set of BWP-specific parameters.

[0077] Virtual resource blocks (VRBs) are defined within the bandwidth part and are numbered from 0 to N. size,u BWP,i -1, where i is the number of the bandwidth part. The UE may assume that VRBs are mapped to PRBs according to the mapping method indicated to the UE (e.g., non-interleaved or interleaved mapping). If no mapping method is indicated, the UE assumes non-interleaved mapping. In the case of non-interleaved VRB-to-PRB mapping, VRB n may be mapped to PRB n. In the case of interleaved VRB-to-PRB mapping, VRBs may be distributed and mapped to PRBs according to a predefined rule.

[0078] Figure 5 illustrates communication links in a wireless communication system.

[0079] Referring to FIG. 5, in a wireless communication system, a UE receives information from a BS via a downlink (DL), and the UE transmits information to the BS via an uplink (UL). To address the burden on the BS due to rapidly increasing data traffic, a technology has been studied that supports direct communication between two or more nearby UEs without going through a network node using wireless communication technology (hereinafter, sidelink (SL) communication). UEs within or outside the coverage area of ​​a BS can transmit data to another UE without going through the network via a sidelink that supports UE-to-UE direct communication using sidelink resource allocation modes, physical layer signals / channels, and physical layer processes.

[0080] Transmissions in SL use OFDM waveforms with CP. The frame structure described in Fig. 3 and the resource grid structure described in Fig. 4 can be applied to SL. In some scenarios, for example, in NR V2X, only certain slots can be (pre-)configured to accommodate SL transmissions, and the available sidelink resources can consist of (common) RBs in the sidelink (time resources) and SL BWP (frequency resources). A subset of the available SL resources can be (pre-)configured to be used by several UEs for SL transmissions. This subset of the available SL resources is called a resource pool.

[0081] Figure 6 is a diagram illustrating frequency resources and time resources for sidelink.

[0082] Referring to Fig. 6, a resource pool is composed of (pre-configured) i) contiguous PRBs and ii) contiguous or non-contiguous slots for SL transmissions. The concept of BWP can also be applied to the sidelink. A UE can be configured with a BWP having a numerology and a resource grid for SL transmissions. Hereinafter, a BWP configured for SL transmissions is referred to as an SL BWP. The SL BWP can occupy a contiguous portion of the bandwidth within a carrier. SL transmissions and receptions can occur within the SL BWP. A resource pool can be defined within the SL BWP, and a single numerology is used within the resource pool. A resource pool can be shared by several UEs for SL transmissions, and can be used for all transmission types (e.g., unicast, groupcast, and broadcast). A UE may be configured with one or more sidelink resource pools via higher-layer signaling (e.g., RRC signaling). The UE may transmit on the sidelink using its own transmission resource pool(s), while also receiving data on resource pools used for sidelink transmissions by other UE(s).

[0083] In the frequency domain, the resource pool is divided into a predefined number L of consecutive subchannels, each of which consists of a group of consecutive RBs within a slot. The number of RBs in a subchannel is N. sch corresponds to the subchannel size and is (pre-)set for the resource pool. L and N schcan be provided to the UE via higher layer signaling (e.g., RRC signaling). The first RB of the first subchannel within the SL BWP is (pre-)configured via RRC signaling. For example, the lowest RB index of the subchannel with the lowest index within the resource pool based on the lowest RB index of the SL BWP can be provided to the UE(s). Subchannel size N in NR V2X sch can be equal to 10, 12, 15, 20, 25, 50, 70, or 100 RBs. In sidelink, a subchannel represents the smallest unit for sidelink data transmission or reception. Sidelink transmission can be performed using one or more subchannels.

[0084] In the time domain, slots that are part of a resource pool are (pre-)configured and occur at regular intervals (e.g., 10240 ms). In each slot of the resource pool, N slot symb Among the dog symbols, only a subset of the consecutive symbols are (pre-)configured for sidelinking. The subset of sidelink symbols per slot is indicated by the starting symbol and the number of consecutive symbols, and these are (pre-)configured per resource pool.

[0085] 3GPP-based communication standards define sidelink physical channels corresponding to resource elements that carry information originating from higher layers, and sidelink physical signals corresponding to resource elements used by the physical layer but not carrying information originating from higher layers. For example, the physical sidelink shared channel (PSSCH), the physical sidelink control channel (PSCCH), the physical sidelink broadcast channel (PSBCH), and the physical sidelink feedback channel (PSFCH) can be used as sidelink physical channels. In this specification, the PSCCH carries sidelink control information (SCI) in the sidelink. For example, the SCI is used to indicate resources and other transmission parameters used by the UE for the PSSCH, and the PSCCH transmission is associated with a demodulation reference signal (DM-RS). The PSSCH can carry the data payload in the sidelink and additional control information. Data can be organized into TB(s), and each TB can be associated with an SCI. For example, the PSSCH is used to carry control information for transport block (TB)(s), hybrid automatic repeat request (HARQ) processes, and CSI feedback triggers. In some scenarios, at least six OFDM symbols are used for PSSCH transmission within a slot, and the PSSCH is associated with a DM-RS.The PSBCH carries information to support synchronization in the sidelink, and in some scenarios, the PSBCH may be sent within a sidelink synchronization signal block (S-SSB). The PSFCH carries HARQ feedback on the sidelink from the UE intended to be the recipient of the PSSCH to the UE that performed the PSSCH transmission. Hereinafter, the UE performing the sidelink transmission is referred to as the TX UE, and the intended recipient(s) of the sidelink transmission is referred to as the RX UE(s).

[0086] In some scenarios, SCI is transmitted in two stages. For example, in NR V2X, 1 st -Stage SCI is carried on PSCCH and 2 nd -Step SCI can be carried on the corresponding PSSCH. SCI 1 st -Stage SCI and 2 nd - Dividing into step SCI allows other UEs, other than the RX UEs of the sidelink transmission, to use the above 1 for channel sensing purposes, i.e. to determine resources reserved by other transmissions. st -Allows only step SCI to be decoded. Meanwhile, the above 2 nd -Step SCI provides additional control information required for the RX UE(s) of sidelink transmission.

[0087] The number of symbols used for sidelink transmission within a slot may vary depending on the physical channels carried within the slot.

[0088] Figures 7 and 8 illustrate the transmission structure of sidelink physical channels within a slot.

[0089] A PSCCH can be multiplexed with an associated PSSCH on non-overlapping resources within the same slot. Referring to FIG. 7, a PSCCH is transmitted starting from the lowest RB in the subchannel(s) occupied by the associated PSSCH in the frequency domain, and starting from the second symbol in the slot in the time domain. The number of symbols for the PSCCH is (pre-)configured per resource pool and can be, for example, 2 or 3 symbols. According to some scenarios (e.g., NR V2X), in the frequency domain, the PSCCH is N PSCCH Occupying the RBs of N PSCCH can be (pre-)configured to UE(s) per resource pool via higher layer signaling (e.g. RRC signaling). In some scenarios (e.g. NR V2X), N PSCCH can be set to equal 10, 12, 15, 20, or 25 RBs per resource pool. In some scenarios (e.g., NR V2X), N PSCCH is contained within one subchannel, and the number of RBs for PSCCH is N. PSCCH N is the number of RBs in the subchannel sch can be constrained by (i.e., N PSCCH ≤N sch ). PSCCH is PSSCH and 2 nd -1 containing control information associated with the step SCI st - Carries the SCI step. For this, for example, SCI format 1-A can be used. 1 above st - The step SCI may indicate the frequency resources (e.g., subchannel(s)) of the PSSCH carrying the current (re-)transmission of the transport block (TB), and may indicate resource reservation for retransmission(s) of the TB up to a predefined number of times (e.g., 2). 1 st- The step SCI may include the priority of the associated PSSCH, 2 nd - May include information about the format and size of the step SCI. 1 above st - The step SCI may include information about the modulation and coding scheme (MCS) of the transport block (TB) carried on the associated PSSCH. Although not illustrated in FIG. 7, a DM-RS associated with the PSCCH (hereinafter, PSCCH DM-RS) may be transmitted within the PSCCH for demodulation of the PSCCH. For example, each PSCCH symbol (i.e., an OFDM symbol including the PSCCH) may include a PSCCH DM-RS. Although not illustrated in FIG. 7, the DM-RS associated with the PSSCH is carried on different symbols within the slot to which the PSSCH is allocated (hereinafter, PSSCH slot). Multiple time patterns may be (pre-)configured for the PSSCH DM-RS within the resource pool, and the above 1 st - The step SCI may include information about which time pattern is used for the associated PSSCH.

[0090] PSSCH is 2 nd - carries a data payload consisting of step SCI and TB(s). 2 above nd - The step SCI can carry information used to decode the PSSCH and information to support HARQ feedback and CSI reporting. 2 above. nd - The step SCI may include a layer 1 source ID representing the identifier (within the physical layer) of the TX UE and a layer 1 destination ID representing the identifier(s) of the intended recipient(s) (RX UE(s)) of the corresponding TB. 2 nd- The step SCI may carry a 1-bit new data indicator (NDI) used to specify whether the TB sent on the PSSCH corresponds to a transmission of new data or a retransmission. 1 in the PSCCH st -After decoding the step SCI, the RX UE nd - You will have the information needed to decode the step SCI. 2 nd -Step SCI can be decoded using PSSCH DM-RS. 2 before being mapped to PSSCH nd -Step SCI and TB are each channel coded and multiplexed according to a predefined process. Depending on the number of layers supported in PSSCH (i.e., the number of data streams), the multiplexed 2 nd -Stage SCI and TB, PSSCH's L PSSCH Before being mapped to subchannel(s), it is mapped and precoded to one or two layers. The PSSCH starts from the lowest RB within the subchannel carrying the PSCCH, starting from N PSSCH =L PSSCH *N sch Occupying the dog RBs, here N PSSCH is the number of RBs occupied by the PSSCH, and L PSSCH is the number of subchannels for PSSCH, and N sch is the number of RBs per subchannel.

[0091] Referring to Figure 7, the PSSCH may be transmitted from the second symbol to the second to the last symbol in the slot, or from the second symbol to the symbol immediately preceding the last symbol in the slot. In some scenarios, 7 to 14 symbols may be (pre-)configured in the slot for sidelink, and the PSCCH may be sent in 5 to 12 consecutive symbols. The number of symbols occupied by the PSSCH depends on the number of SL symbols allocated in the slot and whether the PSFCH is sent in that slot. Within the symbols carrying the PSCCH, the PSSCH may be transmitted (the PSCCH may be transmitted in the entire L PSSCH (If the subchannel(s) are not occupied) may be multiplexed in the frequency domain with the PSCCH. The second symbol in the slot (i.e., the first symbol with the PSCCH or with the PSCCH / PSSCH) may be duplicated in the first symbol of the slot for use in automatic gain control (AGC) purposes. Additionally, the symbol after the last symbol with the PSSCH may be used as a guard symbol.

[0092] FIG. 7 illustrates a sidelink transmission structure in which the PSCCH occupies three symbols in the time domain and 14 symbols within a slot of 14 symbols are used for PSCCH / PSSCH transmission; however, the PSCCH may occupy two symbols, or some leading symbols within a slot may be used for PSCCH / PSSCH transmission and the remaining symbols may be used for PSFCH or for additional guard symbols.

[0093] Referring to Fig. 8, according to some scenarios (e.g., NR V2X), for a resource pool with L subchannels, there are L possible PSCCH locations within a slot, starting from the second SL symbol within the slot and from the lowest RB within each subchannel. In other words, for a resource pool with L subchannels, there may be L PSCCH candidate resources in each slot. Therefore, in some scenarios, 1 st - To receive a step SCI, the UE needs to check (or monitor) L possible PSCCH locations in each slot within the resource pool.

[0094] Referring to FIGS. 7 and 8, in some scenarios (e.g., NR V2X), the UE may, through higher layer signaling (e.g., RRC signaling), specify the number of symbols for PSCCH for the resource pool, N. sym,PSCCH and the number of RBs for PSCCH N PSCCH , and the PSCCH starts from the second symbol available for SL transmissions within the slot. sym,PSCCH Starting from the lowest RB of the lowest subchannel of the associated PSSCH within the dog symbols, N PSCCH It is transmitted on the dog RBs.

[0095] A UE may be configured with one or more sidelink resource pools via higher-layer signaling (e.g., RRC signaling). The sidelink resource pools may be used for transmitting or receiving PSSCHs. In some scenarios, the PSSCH is transmitted in the same slot as the associated PSCCH. In some scenarios, the minimum resource allocation unit for the PSSCH in the time domain is a slot. PSSCHs transmitted in consecutive symbols within a slot are not transmitted in symbols not configured for sidelink. The index of the first symbol among consecutive symbols that can be used for sidelink and the number of consecutive symbols that can be used for sidelink may be provided to the UE(s) via higher-layer signaling (e.g., RRC signaling). The UE does not transmit the PSSCH in the last symbol configured for sidelink, which may be used as a guard symbol. In some scenarios, the minimum resource allocation unit for the PSSCH in the frequency domain is a subchannel.

[0096] Referring to FIG. 8, when a PSCCH is transmitted / received in a PSCCH resource candidate of a slot within a resource pool, the PSSCH associated with the PSCCH is transmitted / received within consecutive symbols within the slot in the time domain, and in the frequency domain, the subchannel on which the PSCCH is transmitted / received is L having the lowest subchannel. PSSCHThe PSSCH is transmitted / received on the subchannels. When the PSSCH occupies multiple subchannels, the PSCCH resource candidate(s) of the remaining subchannel(s) other than the lowest subchannel among the multiple subchannels are used for transmission of the PSSCH. The PSCCH resource candidate(s) of the subchannel(s) that are not used for PSSCH transmission in the slot within the resource pool are not used for PSCCH transmission either. The RX UE attempts to detect the PSCCH from the PSCCH resource candidates, and when it detects the PSCCH in the slot, it considers the lowest RB in which the PSCCH is detected based on the SCI carried by the PSCCH as the lowest RB of the PSSCH, and starting from the lowest RB, N PSSCH =L PSSCH *N sch The PSSCH can be received on the dog RBs.

[0097] FIG. 9 is a diagram illustrating an example of sidelink resource allocation, and FIG. 10 illustrates the flow of the resource sensing and reservation (RSS) process described above.

[0098] Two SL resource allocation modes are considered for selection of sub-channels in sidelink communications: Mode 1, where SL resource allocation is provided by the network, and Mode 2, where the UE determines SL transmission resources within a resource pool(s). Figure 9 illustrates sensing and resource selection, in particular, in Mode 2.

[0099] In some implementations, SL resource allocation mode 2 allows the UE to autonomously select its SL resources (e.g., one or more subchannels) from a resource pool. In this case, the UE may operate without network coverage, and the resource pool may be (pre-)configured by the BS when within network coverage. In some implementations, SL resource allocation mode 2 may operate in a dynamic or semi-persistent manner. The SL resource allocation mode 2 uses almost the same process to select resources for the dynamic and semi-persistent modes, but the dynamic mode selects new resources for each TB and reserves only resources for retransmissions of that TB, whereas the semi-persistent mode selects resources for consecutive SL_Resource_Reselection_Counter TBs.

[0100] In the following description, UE is 1 st - Selected resources that are reserved for future transmissions by notifying neighboring UEs using step SCI are specifically called reserved resources. The UE can select and reserve resources for transmission of several TBs (and their retransmissions). The UE can select new SL resources when creating a new TB. In sidelink resource allocation mode 2, when a new TB is created, the upper layer of the UE (e.g., MAC layer) can trigger resource selection for PSSCH / PSCCH transmission. To trigger the resource selection process in slot n, the L1 priority, the remaining packet delay budget (PDB), and the number of subchannels L to be used for PSSCH / PSCCH transmission in the slot are required. subCH , resource reservation interval (RRI) P rsvp_TX, a set S of resources subject to re-evaluation re Parameters such as these may be provided to the physical layer of the UE by the upper layer. To select new SL resources, the UE first defines a selection window to find candidate resources for transmitting a TB. Referring to FIG. 9, the selection window includes all resources within the range of slots [n+T1, n+T2], where n is a resource (re-)selection trigger or slot from which new resources should be selected, and T1 is a processing time (in slots) required by the UE to identify candidate resources and select new SL resources for transmission, where T1 is, for example, 3, 5, 9, or 17 slots for subcarrier spacings of 15, 30, 60, or 120 kHz, respectively. proc,1 is smaller than T2, and the value of T 2min <= T2 <= A value determined by the UE within the range of PDB, where PDB is a packet delay budget (in slot units), which is a latency deadline within which the TB must be transmitted and is determined by the application transmitting the packet to be transmitted to the TB. T 2min depends on the priority and subcarrier spacing of TB, for example, T 2min The possible values ​​are {1, 5, 10, 20}*2 u , where u is a subcarrier spacing setting. Once the selection window is determined, the UE selects a set S of candidate resources within the selection window. A , and identifies a candidate resource R within slot y of the selection window. x,y is by slot in time and L in frequency PSSCH Dog (i.e. L subCH is determined by a set of contiguous subchannels of L. PSSCH is the above TB and (1st -Stage SCI and 2 nd - Since the associated SCI (including the step SCI) must be selected to fit within the above candidate resource, L PSSCH depends on the size of the TB, the size of the SCI, and the modulation and coding scheme (MCS).

[0101] If the UE is not transmitting, the UE senses SL resources during a sensing window (S1001) to identify available candidate resources. The sensing window is divided into slots [n-T0, nT proc,0 ] includes all resources within the range of n, where n is a resource (re-)selection trigger or slot from which new resources should be selected, and T0 is an integer defined as the number of slots depending on the subcarrier spacing setting, for example, corresponding to 1100 ms or 100 ms and determined by the (pre-)configuration of the resource pool. T proc,0 is the time required to complete the sensing process, which can be, for example, 1 slot for a subcarrier spacing of 15 or 30 kHz, or 2 or 4 slots for a subcarrier spacing of 60 or 120 kHz. During the sensing process, the UE receives 1 SL received from other UE(s) within the sensed SL resources. st - Blindly decode the step SCI(s) received from another UE. st - The step SCI may indicate that the other UE has reserved the corresponding SL resource for transport block (TB) transmission via PSSCH and SCI transmission via PSCCH. In particular, the above 1 st -Stage SCI is 1 above st- The UE may indicate SL resources reserved for retransmission of the TB associated with the step SCI, and resources reserved for initial transmission and retransmission of the next TB. The UE may indicate the sensed information (e.g., decoded 1 st -Save the reference signal received power (RSRP) measurements for step SCI and PSCCH / PSSCH DMRS (S1OO2) and use the sensed information when determining which candidate resources to exclude from the selection window when a new selection is triggered.

[0102] To select new resources, the above SL resource allocation mode 2 defines the following two-step algorithm.

[0103] > Step 1: The UE first forms a candidate resource set by excluding candidate resources from the selection window according to a certain rule (S1003). For example, (a) the UE receives an SCI format in slot m and (if any) P rsvp_RX (a) is indicated by the resource reservation period field in the SCI format, (b) the RSRP measurement is higher than the threshold for the priority given by the SCI format, and (c) the received SCI format received in slot m or slot(s) m+q*P rsvp_RX The same SCI format that is assumed to be received from a set of resource blocks and R x,y+j*Prsvp_TX Once the slots overlapping with are determined, the UE initializes the set S A From R x,y By excluding candidate resources, we can determine the candidate resource set. Here, q=1,2,...,Q and j=0,1,...,C resel -1. Q = Ceil(T scal / P rsrp_RX) and when the UE is set to full sensing by the upper layer (e.g. RRC layer), T scal is set to the selection window size T2 converted to msec units, and T is set when the UE is set to partial sensing by the upper layer (e.g., RRC layer). scal = t' SL yL - (t' SL yi - t SL proc,1 ) is converted to msec, where t' SL yL is the last slot among Y or Y' candidate slots, and t' SL yi is the first slot among Y or Y' candidate slots in the selected / remaining set. The number of slots in a set of time and frequency resources for PSSCH transmission opportunities is C resel is given by , and when set, C resel =10*SL_RESOURCE_RESELECTION_COUNTER otherwise C resel is set to 1.

[0104] > Step 2: After performing all exclusions in Step 1, the UE selects (N candidate) resource(s) from among the remaining available candidate resources (i.e., the candidate resource set determined in Step 1) (S1004).

[0105] The UE selects N candidate resources within the same selection window for the initial transmission of a TB and its N-1 blind or potential HARQ retransmissions, wherein the selection of the N candidate resources follows the two-step algorithm described above. The UE can perform HARQ retransmissions for groupcast or unicast transmissions if the PSFCH is (pre-)configured within the resource pool, otherwise it can only perform blind retransmissions. When using HARQ retransmissions, if a TB is positively acknowledged, the TX UE drops all subsequent scheduled retransmissions of the TB within the selected resources (including reserved resources). The value of N may vary depending on the UE implementation. If the UE selects a value of N, the UE performs 1-1 selection and reservation of the N candidate resources. st - Consider the limitations of the SCI step. For example, 1 st -Stage SCI is 1 above st - Only resource reservations located within a window W (e.g., of 32 slots) starting from the slot in which the -step SCI is transmitted can be notified, and only for at most N resources, where the maximum value of N can be (pre-)set for the resource pool by the upper layer parameter sl-MaxNumPerReserve to, for example, 2 or 3. Therefore, 1 st -Stage SCI is 1 above st - It can notify about the transmission (or retransmission) of TB occurring in the same slot as the transmission of the -step SCI and about N - 1 reserved resources for the following N - 1 retransmissions of the TB. For example, 1 st- The time resource assignment field in the step SCI (e.g., SCI format 1-A) carries a logical slot offset indication of N = 1 or 2 actual resources if the upper layer parameter sl-MaxNumPerReserve is 2, or N = 1 or 2 or 3 actual resources if sl-MaxNumPerReserve is 3, in the form of a time resource assignment field containing a time resource indicator value (TRIV) determined as follows:

[0106]

[0107] Here, the first resource is within the slot in which SCI format 1-A is transmitted, and t i means the i-th resource time offset based on the first resource, where 1 <= t1<=31 for N=2; and 1 <= t1<=30, 1 <= t2<=31 for N=3. The time resource allocation field in the SCI format 1-A is 5 bits when the value of the upper layer parameter sl-MaxNumPerReserve is set to 2, and is 9 bits when sl-MaxNumPerReserve is set to 3.

[0108] After performing all exclusions in step 1, the UE may first randomly select one of the N resources to select N resources from the available candidate resources. For example, a UE that selected the first resource in slot m1 randomly selects the second resource such that the 1-th resource time offset t1 relative to the first resource is less than the window W. If N>2, the UE randomly selects the third resource within the range [m1, m1+(W-1)] or the range [m2, m2+(W-1)]. This process is repeated until all resources for TB retransmissions are reserved by the previous SCI. If the UE can select only a subset of the N resources through this process, the remaining resources are those that were previously reserved. st - Even if the step SCI constraints are not satisfied, it can be randomly selected within the above selection window.

[0109] Start subchannel n of the first resource above start subCH,0 is the subchannel in which the lowest RB of the associated PSCCH is transmitted. The number of consecutively allocated subchannels L for each of the N resources is subCH >=1, and the starting subchannel indices of the resources indicated by the SCI format 1-A transmitted above can be determined from a frequency resource allocation field equal to a frequency resource indicator value (FRIV), excluding the starting subchannel index of the resource in which the SCI format 1-A is transmitted within the slot, as follows.

[0110]

[0111] Here, n start subCH,1 means the starting subchannel for the second resource, and n start subCH,2 means the starting subchannel for the third resource, NSL subchannel is the number of subchannels in the resource pool provided according to the upper layer parameter sl-NumSubchannel (e.g., see L in Fig. 6). The number of consecutively allocated subchannels L subCH is the number of subchannels to be used for PSSCH / PSCCH transmission in a slot (i.e., the number of subchannels available for PSSCH / PSCCH transmission in a slot), and is indicated equally for N = 1, 2, and 3. The frequency resource allocation field in the SCI format 1-A is set to Ceil{log2(N) when the value of the upper layer parameter sl-MaxNumPerReserve is set to 2. SL subchannel*(N SL subchannel+1) / 2)}-bits, and sl-MaxNumPerReserve is set to 3, then Ceil{log2(N SL subchannel*(N SL subchannel+1)*(2*N SL subchannel+1) / 6)}-bits.

[0112] The above SCI format 1-A can inform about the resource reservation period (RRP) when reserving resources for PSSCH on a semi-persistent basis. As mentioned above, among the scheduling schemes of SL resource allocation mode 2, the semi-persistent scheme selects resources for consecutive SL_Resource_Reselection_Counter TBs. The time period between resources selected for transmission of consecutive TBs is defined by the resource reservation interval (RRI), and the allowed RRIs are (pre-)configured via the higher layer parameter sl-ResourceReservePeriodList regarding the set of possible RRPs allowed in the resource pool for mode 2. When the UE selects new SL resources, it selects an RRI from the list, and the SL_Resource_Reselection_Counter is randomly set within the interval depending on the selected RRI. For example, a UE transmitting a PSCCH with SCI format 1-A using SL resource allocation mode 2 sets the resource reservation period field of the SCI format 1-A to an index corresponding to a reservation period provided by a higher layer (e.g., MAC) among the indices in sl-ResourceReservePeriodList when the UE is provided with the upper layer (e.g., RRC) parameter sl-MultiReserveResource. The number of bits in the resource reservation period field in SCI format 1-A is Ceil(log2N rsv_period ) is determined by, where, N rsv_period The number of entries in the upper layer parameter sl-ResourceReservePeriodList when sl-MultiReserveResource is set, otherwise it is 0.

[0113] The resource(s) selected for the MAC PDU (i.e., TB) to be transmitted are set S before the slot m in which the SCI format indicating said resource(s) is first transmitted. re may be re-evaluated by the UE (S1005). For example, the UE may re-execute step 1 to check if the selected resource(s) are still available. The decision on whether to re-execute step 1 and how often to do so may vary depending on the UE implementation. The UE may execute step 1 in or before slot m - T3, where T3 may be the maximum time required for the UE to complete the resource selection process. In some implementations, T SL proc,1 may be identical to T SL proc,1 can be defined in slot units and can be predefined depending on the subcarrier spacing used for sidelink communication.

[0114] If resource reselection is not triggered (S1006, No), the UE can start PSCCH / PSSCH transmission on the selected resource (S1007).

[0115] When resource re-selection is triggered through resource re-evaluation, the UE may restart the process of collecting sensing information.

[0116] If the UE generates a new MAC PDU (i.e., a new TB), the process of selecting SL resources can be restarted (S1008, Yes); otherwise, transmission can be performed using the already reserved resource(s) (S1008, No).

[0117] Figure 11 is a diagram illustrating a problem caused by a hidden UE. Referring to Figure 11, when UE B is within the transmission range of UE A and UE C, UE B can receive transmissions and detect resource reservations of UE A and UE C. However, due to the hidden UE problem, UE A's resource reservation can be detected only by UE B among UE B and UE C, and UE C's resource reservation can be detected only by UE B among UE A and UE B. Therefore, if there is no inter-UE coordination, UE A may detect that the resource reserved by UE C is available, which may lead to a risk of packet collision.

[0118] Figure 12 illustrates inter-UE coordination.

[0119] To solve the hidden UE problem, UE-to-UE coordination may be considered. Referring to FIG. 12, UE-A (RX_A of FIG. 12) may send coordination information to UE-D (TX_D of FIG. 12) from UE-C (RX_C of FIG. 12) (S1201a). UE-A may eavesdrop on the coordination information transmitted to UE-D by UE-C (S1201b) and transmit a coordination message to UE-B (TX_B of FIG. 12) based on the eavesdropped coordination information. The following two UE-to-UE coordination methods may be considered.

[0120] > UE-to-UE coordination method #1: Information about a set of preferred and / or non-preferred resources for transmission of UE-B (TX_B in FIG. 12) can be provided as coordination information from UE-A (RX_A in FIG. 12) to UE-B (S1202).

[0121] > UE-to-UE coordination method #2: The presence of a resource conflict on the resources indicated by the SCI format of UE-B can be provided from UE-A to UE-B as coordination information (S1202).

[0122] UE-B can perform resource selection based on the above coordination message from UE-A (S1203). UE-B can perform PSSCH transmission on the resource selected through the above resource selection (S1204).

[0123] In some scenarios, the TX UE in sidelink resource allocation mode 2 performs interference measurements in frequency range 1, which includes sub-6 GHz frequency bands, assuming an omni-directional beam. In some scenarios, it may be considered that the RX UE measures the interference and reports it to the TX UE to address the hidden node problem (i.e., the hidden UE problem).

[0124] Figure 13 is a diagram illustrating a problem of interference measurement by a transmitting UE.

[0125] Unlike frequency range 1 where an omni-directional beam can be assumed, frequency range 2, which includes the frequency bands from 24.5 GHz to 71.0 GHz, uses a directional beam, which may make accurate interference measurement difficult at the TX UE. Referring to FIG. 13, when the TX_itf UE transmits to the RX_itf UE with a directional beam, the interference estimated at the TX UE may be very weak, while the actual interference experienced by the RX UE may be strong. Therefore, an enhanced SL resource allocation mode 2 is required considering SL communication on high-frequency bands. Hereinafter, implementations of the present specification for the enhanced SL resource allocation mode 2 are described.

[0126] Figure 14 illustrates zone identifiers (IDs).

[0127] In the existing SL communication, the zone ID of the TX UE is carried by the PSSCH 2 nd - It could be transmitted through SCI format 2-B, which is the format of the step SCI. The SCI format 2-B includes the required communication range and the zone ID of the TX UE. The zone ID field in the SCI format 2-B indicates the zone in which the TX UE is located. The zone ID is indicated by, for example, 12 bits, and a given area is divided into two equal-sized zones. 12 The area can be divided into square regions. The required communication range can be expressed by 4 bits using a set of 16 (pre-)configured values ​​selected from a defined set of possible values. The defined set of possible values ​​can include: 20, 50, 80, 100, 120, 150, 180, 200, 220, 270, 300, 350, 370, 400, 420, 450, 500, 600, 700, 1000 m. The UE can determine the ID of the zone in which the TX UE is located (i.e., zone ID) using the following equations when the RRC configuration sl-ZoneConfig is set by the network:

[0128] x1= Floor(x / L) mod 64;

[0129] y1= Floor (y / L) mod 64;

[0130] Zone_ID = y1*64 + x1.

[0131] Here, L is the value of zonesl-ZoneLength, which represents the length of each geographic zone contained in sl-ZoneConfig, x is the geodesic distance (expressed in meters) in longitude between the UE's current location and the geographic coordinates (0, 0), and y is the geodesic distance (expressed in meters) in latitude between the UE's current location and the geographic coordinates (0, 0).

[0132] Figure 15 illustrates part of the resource sensing and reservation process according to some implementations of this specification.

[0133] In some implementations of this specification, a zone identifier (ID) may be utilized for enhanced SL resource allocation mode 2. For example, in some implementations, 1 st - The SCI format carried on the step SCI, i.e., PSCCH, includes the zone ID (hereinafter, ZoneID_RX) for the RX UE. The TX UE (i.e., sensing UE) monitors the PSCCH of other UEs for sensing purposes and receives the received 1 st - PSSCH scheduling information (e.g., time resource allocation and frequency resource allocation for PSSCH) and ZoneID_RXitf can be obtained from the step SCI. Here, ZoneID_RXitf is 1 detected by the TX UE. st - This is the ID of the zone where the destination UE (hereinafter, RX_itf UE) of the PSCCH / PSSCH transmission performed by another UE (hereinafter, TX_itf UE) that transmitted the step SCI is located.

[0134] If ZoneID_RX and ZoneID_RXitf are the same, that is, if the ID (ZoneID_RX) of the zone where the destination UE (hereinafter, RX UE) of the PSCCH / PSSCH transmission by the TX UE is located is the same as ZoneID_RXitf in the SCI format carried by the PSCCH transmitted by the TX_itf UE (S1501, Yes), the TX UE can exclude the PSCCH / PSSCH resource for which the SCI format is detected from the candidate resource set (S1503a). If ZoneID_RX and ZoneID_RXitf are not the same, a (general) resource sensing and selection (RSS) process (e.g., see FIG. 10) can be performed.

[0135] In some implementations of this specification, the following conditions may be considered for resource exclusion:

[0136] > Alt 1. ZoneID_RX based: If ZoneID_RX = ZoneID_RXitf, then PSCCH carrying SCI format containing ZoneID_RXitf is received on the resource (e.g. L starting from the subchannel containing PSCCH (i.e. having the index of the subchannel containing PSCCH as the lowest subchannel index)). subCH (consecutive subchannels of the dog) can be excluded from this candidate resource set.

[0137] > Alt 2. Based on both ZoneID_RX and Zone_TX: if ZoneID_RX = ZoneID_RXitf, and d_tx_rx - d_tx_rx_ift < d th If , a resource on which a PSCCH carrying an SCI format including ZoneID_RXitf is received can be excluded from the candidate resource set. Here, d_tx_rx is the distance between TX-RX UEs (i.e., TX UE and RX UE), d_tx_rx_itf is the distance between interfering TX-RX UEs (i.e., TX_itf UE and RX_itf UE), and d thare predefined or preset thresholds. d_tx_rx and d_tx_rx_itf can be calculated by the TX UE based on ZondID_TX and ZoneID_RX.

[0138] > Alt 3. Based on ZoneID_RX and RSRP: If ZoneID_RX = ZoneID_RXitf, then RSRP > RSRP th If so, the resource on which the PSCCH carrying the SCI format including ZoneID_RXitf is received may be excluded from the candidate resource set. Here, RSRP is the RSRP measured by the TX UE based on the PSCCH / PSSCH DM-RS from other UEs, and RSRP th is a predefined or pre-set threshold value.

[0139] In some implementations of this specification, the UE may measure RSRP for resource selection as follows:

[0140] > PSSCH-RSRP across DM-RS resource elements for PSSCH according to the SCI format received over PSCCH when the upper layer (e.g. RRC layer) parameter sl-RS-ForSensing is set to 'pssch'; and

[0141] > PSSCH-RSRP across DM-RS resource elements for PSCCH according to the SCI format received over PSCCH when the upper layer (e.g. RRC layer) parameter sl-RS-ForSensing is set to 'pscch'.

[0142] A TX UE may determine a zone ID for a given RX UE based on assisted information such as its own location, the location of the RX UE, the velocity of the RX UE, and the channel quality reported (by the RX UE). In some implementations, for example, the following assistance information may be exchanged between UEs: geographic location, velocity, and channel quality.

[0143] The zone ID of the RX UE may or may not change dynamically. In case the zone ID of the RX UE changes due to movement of the RX UE or RX UE_itf, the TX UE may perform a re-evaluation T3 hours prior to transmission.

[0144] In some implementations of this specification, ZoneID_RX may be applied in the general RSS process. For example, in the process of forming a candidate resource set by excluding resources from among resources in a resource pool (see S1003 of FIG. 10), the TX UE may include or exclude the resource detected by the PSCCH in the candidate resource set based on ZoneID_RX in the SCI format carried by the PSCCH, according to Alt 1, Alt 2, or Alt 3 described above.

[0145] Although the implementations of this specification have been described above using sidelink communication as an example, the implementations of this specification can be applied to communication between devices regardless of their name.

[0146] FIG. 16 is an example of a process in which a communication device (hereinafter, TX UE) performs wireless signal transmission according to some implementations of the present specification.

[0147] A TX UE may perform operations according to some implementations of the present disclosure in connection with transmitting a wireless signal. The TX UE may include at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for the TX UE may include at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-transitory) storage medium may store at least one computer program comprising instructions that, when executed by the at least one processor, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may contain instructions that, when executed, cause (at least one processor) to perform operations according to some implementations of the present specification.

[0148] In the TX UE, the processing device, the computer-readable (non-transitory) storage medium, and / or the computer program product, the operations include: monitoring slots belonging to a resource pool within a sensing window; FIG. 16 is an example of a process in which a communication device (hereinafter, TX UE) performs wireless signal transmission according to some implementations of the present specification.

[0149] A TX UE may perform operations according to some implementations of the present disclosure in connection with transmitting a wireless signal. The TX UE may include at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for the TX UE may include at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-transitory) storage medium may store at least one computer program comprising instructions that, when executed by the at least one processor, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may contain instructions that, when executed, cause (at least one processor) to perform operations according to some implementations of the present specification.

[0150] In the TX UE, the processing device, the computer-readable (non-transitory) storage medium, and / or the computer program product, the operations may include: monitoring slots belonging to a resource pool within a sensing window; determining a candidate resource set for the wireless signal transmission within the resource pool based on the monitored slots (S1601); and performing the wireless signal transmission on a first resource within the candidate resource set (S1603). Performing the wireless signal transmission includes: transmitting a first physical control channel carrying a first control information format for scheduling a first physical shared channel and the first physical shared channel on the first resource, wherein the first control information format may include a first zone identifier of a destination UE of the wireless signal transmission.

[0151] In some implementations, determining the candidate resource set may include: detecting a second physical control channel carrying a second control information format within the resource pool, the second control information format including a second zone identifier of a destination UE of a second transport block associated with the second control information format; and excluding a second resource from the candidate resource set, on which the second physical control channel carrying the second control information format is detected, based on the first zone identifier in the first control information format being identical to the second identifier in the second control information format.

[0152] In some implementations, excluding the second resource from the candidate resource set, on which the second physical control channel carrying the second control information format is detected, based on the first zone identifier in the first control information format being identical to the second identifier in the second control information format, is performed if: i) the first zone identifier and the second zone identifier are identical, and ii) d_tx_rx - d_tx_rx_itf < dth Based on this, it may include excluding the second resource from the candidate resource set, wherein d_tx_rx is the distance between the transmitting UE and the destination UE of the wireless signal transmission, d_tx_rx_itf is the distance between the transmitting UE of the second physical control channel and the destination UE of the second transport block, and d th is a predetermined threshold value related to distance.

[0153] In some implementations, the operations may include: calculating d_tx_rx and d_tx_rx_itf based on an identifier of a zone in which the transmitting UE is located, the first zone identifier, an identifier of a zone in which the transmitting UE of the first physical control channel is located, and the second identifier.

[0154] In some implementations, excluding the second resource from the candidate resource set, on which the second physical control channel carrying the second control information format is detected, based on the first zone identifier in the first control information format being identical to the second identifier in the second control information format, may include: i) excluding the second resource from the candidate resource set, on the basis that the first zone identifier and the second zone identifier are identical, and ii) a reference signal received power (RSRP) measured based on the first physical control channel is greater than a predetermined threshold associated with RSRP.

[0155] In some implementations, the first physical shared channel may carry a control information format including a first transport block and an identifier of a zone in which the transmitting UE is located.

[0156] In some implementations, each of the resources in the resource pool is L subCH It can be a set of consecutive subchannels, L subCH is a predetermined positive integer.

[0157] FIG. 17 is an example of a process in which a communication device (hereinafter, RX UE) performs wireless signal reception according to some implementations of the present specification.

[0158] An RX UE may perform operations according to some implementations of the present disclosure in connection with receiving a wireless signal. The RX UE may include at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for the RX UE may include at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-transitory) storage medium may store at least one computer program comprising instructions that, when executed by the at least one processor, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may contain instructions that, when executed, cause (at least one processor) to perform operations according to some implementations of the present specification.

[0159] In the RX UE, the processing device, the computer-readable (non-transitory) storage medium, and / or the computer program product, the operations may include: performing physical control channel monitoring on a resource pool; and decoding a first physical shared channel in a resource (S1703) based on detecting a first physical control channel carrying a first control information format in a resource in the resource pool (S1701). The control information format may include an identifier of a zone to which the receiving UE belongs.

[0160] In some implementations, the first physical shared channel may carry a control information format including a transport block associated with the first control information format and an identifier of a zone in which a transmitting UE transmitting the first physical shared channel is located.

[0161] According to some implementations of this specification, resources with strong interference can be appropriately excluded from the candidate resource set not only for frequency bands where SL transmission is performed via omni-directional beams but also for frequency bands where SL transmission is performed via directional beams. According to some implementations of this specification, since the UE TX selects candidate resources to be excluded based on the control information format carried by the physical control channel, the resources to be excluded from the candidate resource set can be quickly determined based on the control information format in the physical control channel even before decoding the wireless shared channel or measuring RSRP based on the physical shared channel DM-RS.

[0162] As described above, the examples disclosed herein are provided to enable those skilled in the art to implement and practice the present disclosure. While the examples have been described above with reference to the examples of the present disclosure, those skilled in the art will appreciate that various modifications and variations may be made to the examples of the present disclosure. Accordingly, the present disclosure is not intended to be limited to the examples described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0163] Implementations of this specification can be used in wireless communication systems, BSs, user equipment, and other equipment.

Claims

1. When a transmitting user equipment (UE) performs wireless signal transmission in a wireless communication system, Monitor slots belonging to a resource pool within a sensing window; Based on monitoring the above slots, determining a candidate resource set for the wireless signal transmission within the resource pool; and Comprising performing the wireless signal transmission from the first resource within the candidate resource set, Performing the above wireless transmission: A first physical control channel carrying a first control information format for scheduling a first physical shared channel and transmitting the first physical shared channel on the first resource, The first control information format includes a first zone identifier of a destination UE of the wireless signal transmission. Method for performing wireless signal transmission.

2. In paragraph 1, Determining the set of candidate resources above: Detecting a second physical control channel carrying a second control information format within the resource pool, the second control information format including a second zone identifier of a destination UE of a second transport block associated with the second control information format; and Including excluding a second resource detected by the second physical control channel carrying the second control information format from the candidate resource set based on the first zone identifier in the first control information format and the second identifier in the second control information format being the same, Method for performing wireless signal transmission.

3. In paragraph 2, Based on the first zone identifier in the first control information format being the same as the second identifier in the second control information format, the second physical control channel carrying the second control information format is excluded from the candidate resource set for detecting the second resource: i) the first zone identifier and the second zone identifier are the same, and ii) d_tx_rx - d_tx_rx_itf < d th Based on this, excluding the second resource from the set of candidate resources, Here, d_tx_rx is the distance between the transmitting UE and the destination UE of the wireless signal transmission, d_tx_rx_itf is the distance between the transmitting UE of the second physical control channel and the destination UE of the second transport block, and d th is a predetermined threshold value related to distance, Method for performing wireless signal transmission.

4. In paragraph 3, Comprising calculating d_tx_rx and d_tx_rx_itf based on the identifier of the zone where the transmitting UE is located, the first zone identifier, the identifier of the zone where the transmitting UE of the first physical control channel is located, and the second identifier. Method for performing wireless signal transmission.

5. In paragraph 2, Based on the first zone identifier in the first control information format being the same as the second identifier in the second control information format, the second physical control channel carrying the second control information format is excluded from the candidate resource set for detecting the second resource: i) the first zone identifier and the second zone identifier are the same, and ii) the reference signal received power (RSRP) measured based on the first physical control channel is greater than a predetermined threshold value associated with RSRP, and excluding the second resource from the candidate resource set. Method for performing wireless signal transmission.

6. In paragraph 1, The first physical shared channel carries a control information format including a first transport block and an identifier of a zone where the transmitting UE is located. Method for performing wireless signal transmission.

7. In paragraph 1, Each of the above resources in the above resource pool is L subCH It is a set of consecutive sub-channels, L subCH is a predetermined positive integer, Method for performing wireless signal transmission.

8. When a transmitting user equipment (UE) performs wireless signal transmission in a wireless communication system, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations, said operations comprising: Monitor slots belonging to a resource pool within a sensing window; Based on monitoring the above slots, determining a candidate resource set for the wireless signal transmission within the resource pool; and Comprising performing the wireless signal transmission from the first resource within the candidate resource set, Performing the above wireless signal transmission: A first physical control channel carrying a first control information format for scheduling a first physical shared channel and transmitting the first physical shared channel on the first resource, The first control information format includes a first zone identifier of a destination UE of the wireless signal transmission. Transmitting UE.

9. A computer-readable non-transitory storage medium comprising at least one computer program that causes at least one processor to perform operations, the operations comprising: Monitor slots belonging to a resource pool within a sensing window; Based on monitoring the above slots, determining a set of candidate resources for wireless signal transmission within the resource pool; and Comprising performing the wireless signal transmission from the first resource within the candidate resource set, Performing the above wireless signal transmission: A first physical control channel carrying a first control information format for scheduling a first physical shared channel and transmitting the first physical shared channel on the first resource, The first control information format includes a first zone identifier of a destination UE of the wireless signal transmission. Storage media.

10. In a wireless communication system, when a receiving user equipment (UE) performs wireless signal reception, Perform physical control channel monitoring on the resource pool; Decoding a first physical shared channel within the resource based on detecting a first physical control channel carrying a first control information format in a resource within the resource pool, The above control information format includes an identifier of a zone to which the receiving UE belongs. Method of performing wireless signal reception.

11. In paragraph 10, The first physical shared channel carries a control information format including a transport block associated with the first control information format and an identifier of a zone in which a transmitting UE transmitting the first physical shared channel is located. Method of performing wireless signal reception.

12. In a wireless communication system, when a receiving user equipment (UE) performs wireless signal reception, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations, said operations comprising: Perform physical control channel monitoring on the resource pool; Decoding a first physical shared channel within the resource based on detecting a first physical control channel carrying a first control information format in a resource within the resource pool, The above control information format includes an identifier of a zone to which the receiving UE belongs. Receiving UE.

13. A computer-readable non-transitory storage medium comprising at least one computer program that causes at least one processor to perform operations, the operations comprising: Perform physical control channel monitoring on the resource pool; Decoding a first physical shared channel within the resource based on detecting a first physical control channel carrying a first control information format in a resource within the resource pool, The above control information format includes an identifier of a zone to which the receiving UE belongs. Storage media.

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