Method for transmitting channel, communication device and storage medium, and method for receiving channel, communication device and storage medium

Abstract

In this specification, a physical control channel is mapped to the lowest sub-channel among a plurality of sub-channels for a physical shared channel. And when the lowest sub-channel is related to interleaving, mapping a physical control channel to a resource block in the lowest sub-channel in the frequency domain according to an increasing sequence of interleaving indexes and then according to an increasing sequence of resource block indexes.

Description

TECHNICAL FIELD

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

[0002] Various devices and technologies such as machine-to-machine (M2M) communication, machine type communication (MTC), and smart phones and tablet PCs requiring high data transmission rates are emerging and becoming popular. Accordingly, the amount of data that needs to be processed on a cellular network is rapidly increasing. To meet this rapidly increasing data processing demand, technologies such as carrier aggregation for efficiently using more frequency bands and cognitive radio, multi-antenna technology for increasing the data capacity transmitted within a limited frequency, multi-base station (BS) cooperation technology, etc. are being developed.

[0003] A wireless communication system supports communication between user equipments (UEs) using available system resources (e.g., bandwidth, transmission power, etc.). As new wireless communication technologies are introduced, the number of UEs that need to be served by a BS within a preconfigured resource region is increasing, and the amount of data and control information transmitted and received by the UEs served by the BS is also increasing. Since the amount of radio resources available for the BS to communicate with the UEs is limited, new methods are needed to enable the BS to efficiently receive and transmit uplink / downlink data and / or uplink / downlink control information from the UEs using these limited radio resources. That is, as the node density and / or the UE density increase, methods for efficiently using high-density nodes or high-density UEs for communication are needed. For example, to address the burden on the BS caused by the rapidly increasing data traffic, research has focused on using wireless communication technology to enable direct communication between two or more nearby UEs without traversing a network node. As the demand for vehicle-to-everything (V2X) communication as a communication technology that supports wired / wireless communication between vehicles, other vehicles, infrastructure, networks, or pedestrians has emerged, it is expected that SL communication will rapidly increase. SUMMARY

[0004] TECHNICAL PROBLEM

[0005] In consideration of the rapidly increasing number and frequency of direct communication between devices, a solution that stably supports direct communication between devices is needed.

[0006] The purpose of the present specification is not limited to the above-described purpose, and based on the following description, those skilled in the art to which the present specification pertains will be able to clearly understand other purposes not described.

[0007] TECHNICAL SOLUTION

[0008] According to one aspect of this specification, a method for transmitting a channel in a wireless communication system by a communication device is provided. The method includes: mapping a physical control channel carrying control information including information about at least one sub-channel for a physical shared channel to a lowest sub-channel among the at least one sub-channel; mapping the physical shared channel to the at least one sub-channel; and transmitting the physical shared channel and the physical control channel on the mapped at least one sub-channel. Mapping the physical control channel to the lowest sub-channel includes: mapping the physical control channel to RBs within the lowest sub-channel in the frequency domain, based on the at least one sub-channel associated with one or more interleavings, first in ascending order of interleaving index and then in ascending order of resource block (RB) index, and each sub-channel among the at least one sub-channel is associated with the one or more interleavings.

[0009] According to another aspect of this specification, a communication device for transmitting a channel in a wireless communication system is provided. The communication device includes at least one transceiver, at least one processor, and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation. The operation includes: mapping a physical control channel carrying control information including information about at least one sub-channel for a physical shared channel to the lowest sub-channel among the at least one sub-channel; mapping the physical shared channel to the at least one sub-channel; and transmitting the physical shared channel and the physical control channel on the mapped at least one sub-channel. Mapping the physical control channel to the lowest sub-channel includes: mapping the physical shared channel to RBs within the lowest sub-channel in the frequency domain, first in ascending order of interleaving index and then in ascending order of resource block (RB) index, based on the at least one sub-channel associated with one or more interleavings, and each sub-channel among the at least one sub-channel is associated with the one or more interleavings.

[0010] According to another aspect of this specification, a computer-readable non-transitory storage medium includes at least one computer program that causes at least one processor to perform operations. The operations include: mapping a physical control channel carrying control information including information about at least one sub-channel for a physical shared channel to a lowest sub-channel among the at least one sub-channel; mapping the physical shared channel to the at least one sub-channel; and transmitting the physical shared channel and the physical control channel on the mapped at least one sub-channel. Mapping the physical control channel to the lowest sub-channel includes: mapping the physical shared channel to RBs within the lowest sub-channel in the frequency domain, based on the at least one sub-channel associated with one or more interleavings, first in ascending order of interleaving index and then in ascending order of resource block (RB) index, and each of the at least one sub-channels is associated with the one or more interleavings.

[0011] According to another aspect of this specification, a method for receiving a channel in a wireless communication system by a communication device is provided. The method includes: receiving a physical control channel carrying control information within a sub-channel; and, based on the control information, receiving a physical shared channel on at least one sub-channel, with the sub-channel receiving the physical control channel as the lowest sub-channel. Receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to RBs within the lowest sub-channel in ascending order of interleaving index and then in ascending order of resource block (RB) index in the frequency domain, receiving the physical control channel, and each of the at least one sub-channels is associated with the one or more interleavings.

[0012] According to another aspect of this specification, a communication device for receiving a channel in a wireless communication system is provided. The communication device includes at least one transceiver, at least one processor, and at least one memory, the at least one memory being operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation. The operation includes: receiving a physical control channel carrying control information within a sub-channel; and, based on the control information, receiving a physical shared channel on at least one sub-channel with the sub-channel receiving the physical control channel as the lowest sub-channel. Receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to RBs within the lowest sub-channel in ascending order of interleaving index and then in ascending order of resource block (RB) index in the frequency domain, receiving the physical control channel, and each of the at least one sub-channels is associated with the one or more interleavings.

[0013] According to another aspect of this specification, a computer-readable non-transitory storage medium includes at least one computer program that causes at least one processor to perform operations. The operations include: receiving a physical control channel carrying control information within a sub-channel; and, based on the control information, receiving a physical shared channel on at least one sub-channel with the sub-channel receiving the physical control channel as the lowest sub-channel, wherein receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to RBs within the lowest sub-channel in ascending order of interleaving index and then in ascending order of resource block (RB) index in the frequency domain, receiving the physical control channel, and each of the at least one sub-channels is associated with the one or more interleavings.

[0014] In each aspect of this specification, the method or operation may include receiving a bandwidth portion (BWP) configuration for direct communication between communication devices. The BWP configuration includes a sub-channel associated configuration, and the sub-channel associated configuration includes information about the number of sub-channels within the BWP and information about the number of consecutive RBs for each sub-channel.

[0015] In each aspect of this specification, the BWP configuration also includes information about the number of RBs used for physical control channel transmission.

[0016] In each aspect of this specification, the number of RBs in the lowest subchannel is greater than the number of RBs used for physical control channel transmission.

[0017] In each aspect of this specification, the method or operation may include determining that the at least one subchannel is associated with one or more interleavings based on an interleaving-based frequency domain resource allocation configured for the frequency band including the at least one subchannel.

[0018] In each aspect of this specification, each of the one or more interleavings consists of a plurality of non-contiguous RBs in the frequency domain.

[0019] The above configurations are merely some examples of this specification. Those skilled in the art can deduce and understand various examples reflecting the technical features of this specification based on the following detailed description.

[0020] Beneficial effects

[0021] According to some embodiments of this specification, wireless communication signals can be transmitted and received efficiently. Therefore, the overall throughput of the wireless communication system can be increased.

[0022] According to some embodiments of this specification, direct communication technology between communication devices in the licensed spectrum can also be used in the shared spectrum. This SL communication technology is licensed to a specific network operator and can be exclusively or preferentially used by the corresponding network operator.

[0023] According to some embodiments of this specification, sidelink communication can be effectively performed in shared spectrum, which is unlicensed spectrum that is not licensed to a specific network operator and can be freely used by multiple network operators.

[0024] The effects of this specification are not limited to the purposes described above. Those skilled in the art to which this specification pertains will be able to clearly understand other effects not described based on the following description. Attached Figure Description

[0025] Figure 1 An example of a communication system (1) that can be implemented using this specification is shown.

[0026] Figure 2 This is a block diagram illustrating an example of a communication device capable of performing the methods according to this specification.

[0027] Figure 3 An example of a frame structure available in a wireless communication system based on the 3GPP is shown.

[0028] Figure 4 The resource grid for the time slot is shown.

[0029] Figure 5 The communication link in the wireless communication system is shown.

[0030] Figure 6 It is a view used to describe the frequency and time resources used for sidelinks.

[0031] Figure 7 and Figure 8 The transmission structure of the physical channel within the time slot is shown.

[0032] Figure 9 Resource block (RB) interleaving is shown.

[0033] Figure 10 The uplink resource allocation based on interleaved RBs in the shared spectrum is shown.

[0034] Figure 11 An example of a resource pool structure in the frequency domain for sidelink transmission over shared spectrum is shown.

[0035] Figure 12 Examples of PSCCH / PSSCH transmissions according to some implementations of this specification are shown.

[0036] Figure 13 Examples of PSCCH resource mapping in the frequency domain according to some implementations of this specification are given.

[0037] Figure 14 Examples of the process of performing sidelink transmissions by communication devices according to some implementations of this specification are shown.

[0038] Figure 15 Examples of the process of performing sidelink reception by communication devices according to some implementations of this specification are shown. Detailed Implementation

[0039] In the following, various embodiments of this specification will be described in detail with reference to the accompanying drawings. The detailed description set forth below in conjunction with the drawings is intended to illustrate exemplary implementations of this specification and is not intended to represent the only possible implementations of this specification. The following detailed description includes specific details to provide a thorough understanding of this specification. However, those skilled in the art will understand that this specification can be implemented without these specific details.

[0040] In some cases, well-known structures and devices may be omitted or shown in block diagram form, focusing on the core function of each structure and device to avoid confusion of concepts in this specification. Furthermore, the same reference numerals will be used throughout this specification to describe the same parts.

[0041] The technologies, devices, and systems described below can be applied to a variety of wireless multiple access systems.

[0042] For ease of explanation, this specification will be described below based on communication systems based on the 3rd Generation Partnership Project (3GPP). However, the technical features of this specification are not limited thereto. For example, although the following detailed description is based on 3GPP 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 matters specific to 3GPP LTE / 5G.

[0043] In this specification, terms and techniques not specifically described may be referenced in 3GPP standard documents, such as 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 TS 36.322, 3GPP TS 36.323, 3GPP TS 36.331, 3GPP TS 37.213, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, and 3GPP TS 37.213. 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.322, 3GPP TS 38.323, 3GPP TS 38.331, etc.

[0044] In the examples described below in this specification, the expression "the device assumes" can mean that the entity transmitting the channel transmits the channel according to an "assumption." This can mean that the entity receiving the channel receives or decodes the channel according to an "assumption," assuming that the channel was transmitted according to an "assumption."

[0045] As described in this specification, a User Equipment (UE) can be fixed or mobile and includes various devices that communicate with a Base Station (BS) to send and / or receive user data and / or various control information. A UE can be referred to as a Terminal Equipment, Mobile Station (MS), Mobile Terminal (MT), or User Terminal (UT). Furthermore, in this specification, a BS generally refers to a fixed station that communicates with the UE and / or other BSs and exchanges various data and control information with the UE and other BSs. A BS can be referred to by other terms such as Advanced BS (ABS), Node-B (NB), Evolved Node-B (eNB), gNB, Base Transceiver System (BTS), Access Point (AP), Processing Server (PS), etc. In the following text, for ease of description, the base station will be referred to as a BS, regardless of the type or version of the communication technology.

[0046] In this specification, a node refers to a fixed point capable of transmitting and receiving radio signals for communication with the UE. Regardless of the name, various types of BSs can be used as nodes. At least one antenna is mounted on a node. An antenna can refer to a physical antenna, an antenna port, a virtual antenna, or an antenna array. A node is also called a point.

[0047] Meanwhile, 3GPP-based communication systems use the concept of cells to manage radio resources, and the cells associated with radio resources are distinguished from cells within a geographical area. A "cell" within a geographical area can be understood as the coverage area where a node can provide services using a carrier, and a "cell" of radio resources is associated with bandwidth (BW), which is the frequency range configured by the carrier. Since downlink coverage (the range where a node can transmit valid signals) and uplink coverage (the range where a node can receive valid signals from a UE) depend on the carrier carrying the corresponding signals, a node's coverage is associated with the coverage of the "cell" of the radio resources used by the node. Therefore, the term "cell" can sometimes refer to the service coverage area of ​​a node, sometimes to radio resources, and sometimes to the range where signals using radio resources can reach with effective strength.

[0048] A “cell” associated with radio resources can be defined as a combination of downlink (DL) resources and uplink (UL) resources, i.e., DL component carriers (CCs) and UL CCs. A cell can be configured with only DL resources or a combination of DL and UL resources. When carrier aggregation is supported, the link between the carrier frequency of the DL resources (or DL ​​CCs) and the carrier frequency of the UL resources (or UL CCs) 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, the UE receives information from the BS via the DL and transmits information to the BS via the 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 transmitted and / or received by the channel.

[0050] 3GPP-based communication standards define downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink physical signals corresponding to resource elements used by the physical layer but not carrying 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 called a pilot) is a signal with a predefined specific waveform known to both the BS and the UE. For example, the Demodulation Reference Signal (DMRS) and Channel State Information RS (CSI-RS) are defined as downlink reference signals. 3GPP-based communication standards also define uplink physical channels corresponding to resource elements carrying information originating from higher layers, and uplink physical signals corresponding to resource elements used by the physical layer but not carrying information originating from higher layers. For example, the Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), and Physical Random Access Channel (PRACH) are defined as uplink physical channels, and demodulation reference signals (DMRS) for uplink control / data signals and sounding reference signals (SRS) for uplink channel measurements are defined.

[0051] In this specification, PDCCH refers to the set of time-frequency resources (e.g., resource elements (REs)) carrying downlink control information (DCI), and PDSCH refers to the set of time-frequency resources carrying downlink data. Furthermore, PUCCH, PUSCH, and PRACH refer to the sets of time-frequency resources carrying UCI (uplink control information), uplink data, and random access preambles, respectively. In the following text, the statement that UE / BS transmits / receives PUCCH / PUSCH / PRACH is equivalent to transmitting / receiving UCI / uplink data / random access preambles on or via PUCCH / PUSCH / PRACH. Additionally, the statement that BS / UE transmits / receives PBCH / PDCCH / PDSCH is equivalent to transmitting / receiving broadcast information / DCI / downlink data on or via PBCH / PDCCH / PDSCH.

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

[0053] Because communication devices receive physical channels and / or physical signals in the form of radio signals, it is impossible to selectively receive only those radio signals that include specific physical channels or specific physical signals via a radio frequency (RF) receiver, or to selectively receive only those radio signals that exclude specific physical channels or specific physical signals via an RF receiver. In practice, the communication device first receives radio signals on the cell via an RF receiver, converts the received radio signals, which are RF band signals, into baseband signals, and uses one or more processors to decode the physical signals and / or physical channels within the baseband signals. Therefore, in some implementations of this specification, when no physical signals and / or physical channels are received, this does not actually mean that the communication device does not receive radio signals that include physical signals and / or physical channels at all, but rather that it does not attempt to recover the physical signals and / or physical channels, for example, it does not attempt to decode the physical signals and / or physical channels from the radio signals.

[0054] Figure 1 An example of a communication system 1 that can be implemented using this specification is shown.

[0055] refer to Figure 1 The communication system 1 used in this specification includes wireless devices, base stations (BS), and networks. Here, wireless devices can refer to devices that perform communication using wireless access technologies such as 5G NR (New RAT), LTE (e.g., E-UTRA), Wi-Fi, and the future 6G.

[0056] Wireless devices may include, but are not limited to, robots 100a, vehicles 100b-1, 100b-2, 100b-3, 100b-4, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include ground vehicles with wireless communication capabilities, autonomous vehicles, vehicles capable of communication between vehicles, etc. Here, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones) and urban air traffic (UAM) (e.g., unmanned air traffic). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices. Mobile devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches, smart glasses), computers (e.g., laptops), etc. Home appliances may include televisions, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, a BS and network can also be implemented as wireless devices, and a particular wireless device can function as a BS / network node for other wireless devices.

[0057] Wireless devices 100a to 100f can connect to the network via BS 200. Wireless devices 100a to 100f can employ AI technology and can connect to AI server 400 via the network. Wireless devices 100a to 100f can communicate with each other via BS 200 / network, but can also communicate directly with each other without BS 200 / network (e.g., sidelink communication). For example, vehicles 100b-1, 100b-2, 100b-3, and 100b-4 can communicate directly with each other (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). Furthermore, 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 / connections can be established between wireless devices 100a to 100f / BS 200 and BS 200 / wireless devices 100a to 100f. Here, wireless communication / connections can be established using various wireless access technologies (e.g., 5G NR) for uplink / downlink (UL / DL) communication and sidelink (SL) communication (or D2D communication). Through wireless communication / connections (UL / DL, SL), the wireless devices and the BS / wireless devices can transmit / receive radio signals. To this end, based on various proposals in this specification, at least some of the following can be performed: various configuration information configuration processes for transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0059] Figure 2 This is a block diagram illustrating an example of a communication device capable of performing the methods according to this specification. (Reference) Figure 2 The first wireless device 100 and the second wireless device 200 can use various wireless access technologies to transmit and / or receive radio signals. Here, the first wireless device 100 and the second wireless device 200 can be connected to… Figure 1 The wireless device 100x and BS 200 and / or the wireless device 100x and the wireless device 100x correspond one-to-one.

[0060] Each of the first wireless device 100 and the second wireless device 200 includes one or more processors 102 and 202 and one or more memories 104 and 204, and also includes one or more transceivers 106 and 206 and / or one or more antennas 108. Processors 102 and 202 may be configured to control memories 104 and 204 and / or transceivers 106 and 206, and implement the functions, processes, and / or methods described / proposed below. For example, processors 102 and 202 may process information in memories 104 and 204 to generate first information / signals, and transmit radio signals including the first information / signals via transceivers 106 and 206. Furthermore, processors 102 and 202 may receive radio signals including second information / signals via transceivers 106 and 206, and store information obtained by processing the second information / signals in memories 104 and 204. Memory 104 and 204 may be connected to processor 102 and 202 and may store various information related to the operation of processor 102 and 202. For example, memory 104 and 204 may execute some or all of the processes controlled by processor 102 and 202, or store software code including commands for executing processes and / or methods, which will be described / presented below. Here, processor 102 and 202 and memory 104 and 204 may be parts of a communication modem / circuit / chip designed to implement wireless communication technology. Transceiver 106 and 206 may be connected to processor 102 and 202 and may transmit and / or receive radio signals via one or more antennas 108 and 208. Transceiver 106 and 206 may include transmitters and / or receivers.

[0061] One or more protocol layers may be implemented by one or more processors 102 and 202, but are not limited thereto. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers, such as the Physical (PHY) layer, Media Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Resource Control (RRC) layer, and 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 in accordance with the functions, procedures, proposals, and / or methods disclosed in this specification. One or more processors 102, 202 may generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data, or information, according to the functions, processes, proposals, and / or methods disclosed in this specification, and provide said signals to one or more transceivers 106, 206. According to the functions, processes, proposals, and / or methods disclosed in this specification, one or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206 and acquire PDUs, SDUs, messages, control information, data, or information.

[0062] One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof, wherein the firmware or software may be implemented as modules, processes, functions, etc. Firmware or software configured to perform the functions, processes, 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, processes, proposals, and / or methods disclosed in this specification may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

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

[0064] One or more transceivers 106 and 206 can send / receive user data, control information, wireless signals / channels, etc., to / from one or more other devices, as described in the method and / or operation flowcharts of this specification. Additionally, one or more processors 102 and 202 can control one or more transceivers 106 and 206 to send / receive user data, control information, or wireless signals to / from one or more other devices. Furthermore, one or more transceivers 106, 206 can be connected to one or more antennas 108, 208, and one or more transceivers 106, 206 can be configured to send and / or receive user data, control information, wireless signals / channels, etc., via one or more antennas 108, 208, as described in the functional, process, proposal, method, and / or operation flowcharts disclosed in this specification. In this specification, one or more antennas can be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 can convert received user data, control information, radio signals / channels, etc., from RF band signals into baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 can also convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals into RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0065] In this specification, one or more memories 104, 204 may store instructions or programs, and during execution, the instructions or programs may cause one or more processors 102, 202 operably connected to one or more memories to perform operations according to some embodiments or implementations of this specification.

[0066] In this specification, a computer-readable (non-transitory) storage medium may store one or more instructions or computer programs, and when executed by one or more processors, the one or more instructions or computer programs may cause one or more processors to perform some implementations or operations according to this specification.

[0067] Figure 3 An example of a frame structure available in a 3GPP-based wireless communication system is shown.

[0068] Figure 3The frame structure described is merely an example, and the number of subframes, time slots, and symbols within a frame can vary. In some wireless communication systems, the Orthogonal Frequency Division Multiplexing (OFDM) parameter sets (e.g., subcarrier spacing (SCS)) can be configured differently across multiple cells aggregated to a single UE. Therefore, the (absolute time) duration of time resources configured with the same number of symbols (e.g., subframes, time slots, or transmission time intervals (TTI)) can be set differently across aggregated cells. Here, symbols can include OFDM symbols (or Cyclic Prefix-OFDM (CP-OFDM) symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols). In this specification, symbols, OFDM-based symbols, OFDM symbols, CP-OFDM symbols, and DFT-s-OFDM symbols can be interchanged.

[0069] refer to Figure 3 Uplink and downlink transmissions are organized in units of frames. The duration of each frame is... T c (Basic unit of time) = , And N f =4096. For reference, sampling time... , And N f,ref =2048. T c and T f have (Constant) = T c / T f =64. A frame consists of 10 subframes, and the duration T of a single subframe is... sf The interval is 1 ms. The subframe is further divided into time slots, and the number of time slots in a subframe depends on the subcarrier spacing. Each time slot can be determined by N based on the cyclic prefix (CP). slot symb Each time slot consists of 14 OFDM symbols. For example, in some scenarios, each time slot consists of 14 OFDM symbols in the case of normal CP and 12 OFDM symbols in the case of extended CP. The parameter set depends on the exponentially scalable subcarrier spacing. The following table shows the subcarrier spacing under normal CP conditions. Number of OFDM symbols per time slot (N) slot symb ), Number of time slots per frame (N) frame,u slot ) and the number of time slots per subframe (N) subframe,u slot ).

[0070] [Table 1]

[0071]

[0072] The following table shows the calculation based on the subcarrier spacing in the case of extended CP. The number of OFDM symbols in each time slot, the number of time slots in each frame, and the number of time slots in each subframe.

[0073] [Table 2]

[0074]

[0075] For the subcarrier spacing configuration u, the time slots are numbered in ascending order within the subframe. And within the frame, they are numbered in ascending order as .

[0076] In the following description, the implementation of this specification will be referred to as a time slot as the smallest unit of time used to schedule uplink, downlink, and sidelink transmissions. However, different terms may be used to refer to the smallest unit of time used for scheduling, depending on the wireless communication system. For example, in LTE-based systems, the smallest unit of time used to schedule transmissions is called a subframe or transmission time interval (TTI), while in NR-based systems, the smallest unit of time used for scheduling is called a time slot.

[0077] Figure 4 The resource grid for the time slots is shown. A time slot comprises multiple symbols in the time domain (e.g., N). slot symb For each parameter set (e.g., subcarrier spacing) and carrier, a Common Resource Block (CRB) N is defined from the signaling of higher layers (e.g., Radio Resource Control (RRC) signaling). size,u grid The beginning of N size,u grid,x *N RB sc Subcarriers and N subframe,u symmb A resource grid of OFDM symbols. Here, N size,u grid,x This represents the number of resource blocks (RBs) in the resource grid. The subscript x is DL for downlink and UL for uplink. N RB sc N is the number of subcarriers per RB. In 3GPP-based wireless communication systems, N RB sc Typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL), there exists a resource grid. The carrier bandwidth N of the subcarrier spacing configuration u...size,u grid The parameters (e.g., RRC parameters) are provided to the UE from higher-layer parameters of the network. Each element in the resource grid of the antenna port p and subcarrier spacing configuration u is called a resource element (RE), and each RE can be mapped to a complex-valued symbol. Each RE within the resource grid is uniquely identified by an index k in the frequency domain and an index l in the time domain indicating the position of the symbol relative to a reference point. RBs can be classified as CRBs and physical resource blocks (PRBs). For subcarrier spacing configuration u, CRBs are numbered from 0 upwards in the frequency domain. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u coincides with "point A", which is the common reference point of the RB grid. PRBs for subcarrier spacing configuration u are defined within the bandwidth portion (BWP) and are numbered from 0 to N. size,u BWP,i -1, where i is the number of the bandwidth section. n within bandwidth section i u CRB With PRB n PRB The relationship between n u PRB =n u CRB +N start,u BWP,i , where N start,u BWP,i It is the bandwidth portion of the CRB that starts relative to CRB 0. The BWP comprises multiple consecutive RBs in the frequency domain. For example, the BWP is a set of parameters u within a given BWP i on a given carrier. i A subset of defined consecutive CRBs. A carrier may include 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 pre-configured number (e.g., 1) of BWPs configured for the UE may be activated on the corresponding carrier.

[0078] For each BWP, the UE may receive at least one of the following parameters for the serving cell: i) subcarrier spacing, ii) CP, iii) assumption N start BWP =275, CRB N start BWP =O carrier +RB start and the number of consecutive RBs N size BWP =LRB, which is indicated by the offset RB set The length of the LRB is provided as the RRC parameter `locationAndBandwidth` in the Resource Indicator Value (RIV), and the number of consecutive RBs N is also given. sizeBWP =LRB, and O provided by the RRC parameter offsetToCarrier for subcarrier spacing. carrier ; an index within the DL BWP or UL BWP; and a set of common BWP parameters and a set of BWP specific parameters.

[0079] Virtual Resource Blocks (VRBs) are defined within the bandwidth portion and are numbered from 0 to N. size,u BWP,i -1, where i is the number of the bandwidth portion. The UE may assume that the VRB is mapped to the PRB according to the mapping method indicated to the UE (e.g., non-interleaved or interleaved mapping). When no mapping method is indicated, the UE assumes non-interleaved mapping. In non-interleaved VRB to PRB mapping, VRB n can be mapped to PRB n. In interleaved VRB to PRB mapping, VRBs can be mapped to PRBs in a distributed manner according to predefined rules.

[0080] Figure 5 The communication link in the wireless communication system is shown.

[0081] refer to Figure 5 In wireless communication systems, UEs receive information from BSs via DL and transmit information to BSs via UL. As a solution to the burden on BSs caused by rapidly increasing data traffic, research has focused on technologies to support direct communication between two or more nearby UEs without traversing network nodes (hereinafter referred to as SL communication). For UEs within or outside the coverage area of ​​the BS, one UE can transmit data to another UE via a sidelink that supports UE-to-UE direct communication using sidelink resource allocation modes, physical layer signaling / channels, and physical layer processing, without traversing the network.

[0082] Transmissions in SL use OFDM waveforms with CP. Figure 3 The frame structure described in Figure 4 The resource grid structure described herein can be applied to SL. In some scenarios, such as NR V2X, only specific time slots can be (pre-)configured to accommodate SL transmissions, and available SL resources can consist of (common) RBs within SL (time resources) and SL BWP (frequency resources). A subset of available SL resources can be (pre-configured) for use by several UEs for SL transmissions. This subset of available SL resources is called a resource pool.

[0083] Figure 6 It is a view used to describe the frequency and time resources of SL.

[0084] refer to Figure 6A resource pool consists of (pre-configured) i) contiguous PRBs and ii) contiguous or discontinuous time slots used for SL transmission. The concept of a BWP can also be applied to SL. A UE can be configured with a BWP having a parameter set and resource grid for SL transmission. In the following text, a BWP configured for SL transmission is referred to as an SL BWP. An SL BWP can occupy a contiguous portion of the bandwidth within a carrier. SL transmission and reception can occur within an SL BWP. A resource pool can be defined within an SL BWP, and a single parameter set can be used within the resource pool. A resource pool can be shared by several UEs for SL transmission and is used for all transmission types (e.g., unicast, multicast, and broadcast). A UE can be configured with one or more SL resource pools via higher-layer signaling (e.g., RRC signaling). A UE can transmit on SL using its own transmission resource pool and also receive data on resource pools used by other UEs for SL transmission.

[0085] In the frequency domain, the resource pool is divided into (pre-)configured L consecutive sub-channels, each sub-channel consisting of a set of consecutive RBs within a time slot. The number of RBs in the sub-channel is N. sch This corresponds to the size of the sub-channel and is pre-configured for the resource pool. L and N can be provided to the UE via higher-layer signaling (e.g., RRC signaling). sch The first RB of the first subchannel within the SL BWP is pre-configured via RRC signaling. For example, based on the lowest RB index of the SL BWP, the lowest RB index of the lowest-indexed subchannel within the resource pool can be provided to the UE. In NR V2X, the size N of the subchannel... sch It can be equal to 10, 12, 15, 20, 25, 50, 70, or 100 RBs. In SL, a subchannel represents the smallest unit used for SL data transmission or reception. One or more subchannels can be used to perform SL transmission.

[0086] In the time domain, time slots, as part of a resource pool, are (pre-)configured and occur at pre-configured intervals (e.g., every 10240 ms). Within each time slot of the resource pool, N... slot symb Of the symbols, only a subset of consecutive symbols are (pre-)configured for SL. The subset of SL symbols for each time slot is indicated by the (pre-)configured number of starting symbols and consecutive symbols for each resource pool.

[0087] 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, physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), physical sidelink broadcast channel (PSBCH), and physical sidelink feedback channel (PSFCH) can be used as sidelink physical channels. In this specification, the PSCCH carries SL control information (SCI) on the SL. For example, the SCI is used to indicate the resources and other transmission parameters used by the UE for the PSSCH, and PSSCH transmission is associated with the demodulation reference signal (DM-RS). The PSSCH can carry data payloads and additional control information on the SL. Data can be organized in transport blocks (TBs), and each TB can be associated with an SCI. For example, the PSSCH carries control information for TBs, Hybrid Automatic Repeat Request (HARQ) processing, and CSI feedback triggering. In some scenarios, at least six OFDM symbols are used for PSSCH transmission within a time slot, and the PSSCH is associated with the DM-RS. The PSBCH can carry information to support synchronization on the SL, and in some scenarios, the PSBCH can be transmitted within the Side Link Synchronization Signal Block (S-SSB). The PSFCH carries HARQ feedback on the SL from the intended recipient UE of the PSSCH to the UE performing the PSSCH transmission. In the following text, the UE performing the SL transmission is referred to as the TX UE, and the intended recipient of the SL transmission is referred to as the RX UE.

[0088] In some scenarios, the SCI is transmitted in two phases. For example, in NR V2X, the first-phase SCI can be carried on the PSCCH, and the second-phase SCI can be carried on the corresponding PSSCH. Dividing the SCI into first-phase and second-phase SCIs allows UEs other than the RX UEs used for SL transmissions to decode only the first-phase SCI for channel sensing purposes, that is, to determine the resources reserved by other transmissions. Meanwhile, the second-phase SCI provides the additional control information required by the RX UEs for SL transmissions.

[0089] The number of symbols used for SL transmission within a time slot can vary depending on the physical channel carried within the time slot.

[0090] Figure 7 and Figure 8 The transmission structure of the physical channel within the time slot is shown.

[0091] PSCCH can be multiplexed with associated PSCCH on non-overlapping resources within the same time slot. (See reference) Figure 7The PSCCH is transmitted in the frequency domain starting from the lowest RB within the subchannel occupied by the associated PSSCH and in the time domain starting from the second symbol within the time slot. The number of symbols used for the PSCCH is (pre-)configured for each resource pool and can be, for example, 2 or 3 symbols. In some scenarios (e.g., NR V2X), the number of RBs occupied by the PSCCH in the frequency domain is N. PSCCH And N PSCCH Each resource pool can be (pre-)configured to the UE via higher-level signaling (e.g., RRC signaling). In some scenarios (e.g., NR V2X), N... PSCCH It can be configured to equal 10, 12, 15, 20, or 25 RBs per resource pool. In some scenarios (e.g., NR V2X), N PSCCH The number N of RBs contained within a single sub-channel and used for PSCCH PSCCH The number N of RBs within the sub-channel can be used to determine this. sch Constraints (i.e., N) PSCCH ≤N sch The PSCCH bearer includes a first-stage SCI and a second-stage SCI containing control information associated with the PSCCH. For this purpose, SCI format 1-A can be used, for example. The first-stage SCI may indicate the frequency resources (e.g., multiple sub-channels) of the PSCCH carrying the current (retransmission) transmission of the TB, and indicate resource reservations for up to a predefined number (e.g., 2) of retransmissions of the TB. The first-stage SCI may include the priority of the associated PSCCH and information about the format and size of the second-stage SCI. The first-stage SCI may include information about the modulation and coding scheme (MCS) of the TB carried on the associated PSCCH. Although in Figure 7 Not shown, but a DM-RS associated with the PSCCH (hereinafter, "PSCCH DM-RS") can be sent within the PSCCH for PSCCH demodulation. For example, each PSCCH symbol (i.e., the OFDM symbol including the PSCCH) may include a PSCCH DM-RS. Figure 7 As not shown, the DM-RS associated with the PSSCH are carried on different symbols within the time slot allocated to the PSSCH (hereinafter referred to as the "PSSCH time slot"). Multiple time modes can be (pre-configured) for the PSSCH DM-RS in the resource pool, and the first-stage SCI can include information about which time mode is used for the associated PSSCH.

[0092] The PSSCH carries a data payload consisting of a second-stage SCI and a TB. The second-stage SCI can carry information for decoding the PSSCH, as well as information to support HARQ feedback and CSI reporting. The second-stage SCI may include a Layer 1 source ID representing the identifier of the TXUE (within the physical layer) and a Layer 1 destination ID representing the identifier of the intended receiver (RX UE) corresponding to the TB. The second-stage SCI may carry a 1-bit New Data Indicator (NDI) specifying whether the TB transmitted on the PSSCH corresponds to a new data transmission or a retransmission. After decoding the first-stage SCI in the PSSCH, the RX UE has the information needed to decode the second-stage SCI. The second-stage SCI can be decoded using PSSCH DM-RS. Before mapping to the PSSCH, the second-stage SCI and TB are each channel-coded and multiplexed according to predefined processing. Depending on the number of layers supported on the PSSCH (i.e., the number of data streams), the multiplexed second-stage SCI and TB are mapped to one or two layers, and in the L layer mapped to the PSSCH... PSSCH Each subchannel is pre-coded beforehand. Starting from the lowest RB in the subchannel carrying the corresponding PSSCH, the PSSCH occupies N... PSSCH =L PSSCH *N SCH There are N RBs, of which N PSSCH It is the number of RBs occupied by PSSCH, L PSSCH N is the number of sub-channels of PSSCH, and N sch It represents the number of RBs in each subchannel.

[0093] refer to Figure 7 The PSSCH can be transmitted from the second to the penultimate symbol within a time slot, or from the second symbol to the symbol immediately preceding the last symbol. In some scenarios, 7 to 14 symbols can be pre-configured for the SL within a time slot, and the PSCCH can be transmitted over 5 to 12 consecutive symbols. The number of symbols occupied by the PSSCH depends on the number of SL symbols allocated within the time slot and whether the PSFCH is transmitted from that time slot. Within the symbol carrying the PSCCH, the PSSCH can be multiplexed with the PSCCH in the frequency domain (when the PSCCH does not occupy all SL symbols). PSSCH (When there are multiple sub-channels). The second symbol within a time slot (i.e., the first symbol including PSCCH or PSCCH / PSSCH) can be copied into the first symbol of the time slot for automatic gain control (AGC) purposes. Additionally, the symbol following the last symbol with PSCCH can be used as a guard symbol.

[0094] Figure 7The SL transmission structure is shown, in which the PSCCH occupies three symbols in the time domain, and 14 symbols in a time slot consisting of 14 symbols are used for PSCCH / PSSCH transmission. However, the PSCCH can occupy two symbols, or some preamble symbols in the time slot can be used for PSCCH / PSSCH transmission, and the remaining symbols can be used for PSFCH or for additional protection symbols.

[0095] refer to Figure 8 In some scenarios (e.g., NR V2X), for a resource pool with L sub-channels, there are L possible PSCCH locations within a time slot, starting from the second SL symbol within the time slot and from the lowest RB within each sub-channel. That is, for a resource pool with L sub-channels, there can be L PSCCH candidate resources in each time slot. Therefore, in some scenarios, in order to receive the first-stage SCI, the UE needs to identify (or monitor) the L possible PSCCH locations in each time slot within the resource pool.

[0096] refer to Figure 7 and Figure 8 In some scenarios (e.g., NR V2X), the UE receives the number N symbols of the PSCCH used for the resource pool via higher-layer signaling (e.g., RRC signaling). sym,PSCCH The number of symbols N in PSCCH PSCCH And the PSCCH starts from the second symbol available for SL transmission within the time slot, and in N PSCCH Send from N RBs sym,PSCCH The lowest RB of the lowest subchannel of the associated PSSCH within a PSCCH symbol.

[0097] A UE can be configured with one or more SL resource pools via higher-layer signaling (e.g., RRC signaling). SL resource pools can be used to transmit or receive PSSCH. In some scenarios, PSSCH is transmitted in the same time slot as the associated PSCCH. In some scenarios, the smallest resource allocation unit for PSSCH in the time domain is the time slot. PSSCH transmitted in consecutive symbols within a time slot is not transmitted in symbols not configured for SL. The index of the first symbol in the consecutive symbols available for SL and the number of consecutive symbols available for SL can be provided to the UE via higher-layer signaling (e.g., RRC signaling). The UE does not transmit PSSCH in the last symbol configured for SL, and the last symbol can be used as a guard symbol. In some scenarios, the smallest resource allocation unit for PSSCH in the frequency domain is the sub-channel.

[0098] refer to Figure 8When a PSCCH is transmitted / received in a PSCCH resource candidate within a time slot in the resource pool, the PSSCH associated with the PSCCH is transmitted / received within consecutive symbols in the time slot in the time domain, and in the frequency domain in L... PSSCH The L is transmitted / received on each sub-channel. PSSCH Each subchannel has a subchannel on which PSSCH is transmitted / received as the lowest subchannel. When PSSCH occupies multiple subchannels, the remaining subchannels among the multiple subchannels, instead of the lowest subchannel, are used as PSSCH resource candidates to transmit PSSCH. PSSCH resource candidates of subchannels not used for transmitting PSSCH in slots within the resource pool are also not used for transmitting PSSCH. The RX UE can attempt to detect PSSCH from the PSSCH resource candidates, and when PSSCH is detected in a slot, the lowest RB of the detected PSSCH can be regarded as the lowest RB of the PSSCH based on the SCI carried by the PSSCH, and the PSSCH can be transmitted from that lowest RB in N. PSSCH =L PSSCH *N sch PSSCH is received on each RB.

[0099] With the emergence of demand for V2X communication as a communication technology supporting wired / wireless communication between vehicles and other vehicles, infrastructure, networks, or pedestrians, SL communication is expected to increase rapidly. To stably support SL communication, it is possible to support SL communication in licensed spectrum that is authorized to a specific network operator and can be exclusively or preferentially used by that operator, and also in shared spectrum (i.e., unlicensed spectrum), which is not authorized to a specific network operator and can be freely used by multiple network operators. However, to support SL communication in shared spectrum, a method for coexistence with SL communication in shared spectrum is needed. The following describes 3GPP-based communication technologies applicable to uplink and / or downlink communication between UE and BS in shared spectrum.

[0100] Unless otherwise stated, the following definitions apply to terms related to shared spectra in this specification.

[0101] - Channel: Consists of consecutive RBs (on which the channel access procedure is performed in a shared spectrum), and may refer to a carrier or a portion of a carrier.

[0102] - Channel Access Procedure (CAP) refers to the process of assessing channel availability based on sensing to determine whether other communication devices should be used before signal transmission. The BS or UE senses the channel during a sensing time slot segment, and if the detected power is less than an energy detection threshold for at least a pre-configured period within the sensing time slot segment, the sensing time slot segment is considered idle or available; otherwise, it is considered busy. CAP can also be referred to as Listen-Before-Speak (LBT).

[0103] Channel occupancy refers to the transmission on the channel by the BS / UE after performing CAP.

[0104] Channel Occupancy Time (COT) refers to the total time that the BS / UE and any BS / UE sharing the channel occupancy can perform transmissions on the channel after the BS / UE performs CAP. COT can be shared for transmissions between the BS and the corresponding UE.

[0105] Because shared spectrum is not dedicated to a specific network operator, the BS and UE can apply LBT (Local Broadcasting Test) before performing transmissions on cells configured with shared spectrum access channels. When LBT is applied, the transmitter listens to / detects the channel to determine whether it is idle or busy, and only performs transmissions if the channel is deemed idle. In other words, for shared spectrum, communication equipment needs to determine whether to use the channels of other communication equipment before signal transmission.

[0106] In a shared spectrum, the time interval and / or the size of the frequency occupied area and / or the power spectral density (PSD) of the signal / channel transmitted by the UE can each be required to a pre-configured level or higher regarding channel occupancy. For example, a communication device may be required to perform transmissions in a shared spectrum at a pre-configured level or higher for the time interval and / or the size of the frequency occupied area and / or the PSD of the signal / channel. Considering such stipulations related to the Occupied Channel Bandwidth (OCB) and PSD of the shared spectrum, a set of (uniformly spaced) discontinuous RBs in the frequency domain can be defined as resource units for physical channel / signal transmission. In the following text, such a set of discontinuous RBs is referred to as interleaved RBs, RB interleaving, or interleaving.

[0107] Figure 9 RB interleaving is shown. Reference Figure 9 Multiple interleavings of RBs can be defined in the frequency domain. An interleaving m∈{0, 1,..., M-1} can consist of (common) RBs {m, M+m, 2M+m, 3M+m, ...}, where M represents the number of interleaved RBs. That is, each interleaving can consist of multiple non-contiguous RBs. In some implementations, M can be given as follows.

[0108] [Table 3]

[0109]

[0110] The following can be given the interleaving RB(n) within BWP i and interleaving m. u IRB,m (∈{0, ​​1, ...}) and CRB n u CRB n u CRB =M*n u IRB,m +N start,u BWP,i +((mN start,u BWP,i ) mod M).

[0111] Communication devices (e.g., UEs) can use one or more interleaved RBs to transmit signals / channels.

[0112] For example, in a 3GPP-based system, the resource block allocation information (RB) in the DCI carried by the PDCCH notifies the UE of a set of up to M interleaving indices and up to N BWP RB-set UL A set of consecutive RB sets (for DCI formats 0_0 and 0_1 monitored in the UE-specific search space). An RB set consists of multiple consecutive RBs. DCI formats 0_0 and 0_1 are the DCI formats used for scheduling PUSCH. In some implementations, the RB set may correspond to frequency resources where CAP is performed individually in the shared spectrum. For operations with shared spectrum channel access, uplink transmission subcarriers are mapped to one or more RBs for interleaving.

[0113] In some scenarios, the UE can determine that the RB corresponding to the intersection of the following items is the frequency resource used for PUSCH transmission: i) the indicated interleaving, ii) the indicated RB set, and (if any) the union of the guard bands between the indicated RB sets.

[0114] Figure 10 The uplink resource allocation based on interleaved RBs in the shared spectrum is shown. Figure 10 (a) shows a case where a set of RBs is indicated by resource allocation information used for PUSCH, and Figure 10 (b) shows the case where a continuous set of RBs is indicated by resource allocation information used for PUSCH.

[0115] Reference Figure 10(a) Based on the resource allocation (RA) information for PUSCH indicating {interleaving #2, RB set #1}, it can be determined that the RB belonging to interleaving #2 in RB set #1 is a PUSCH resource. That is, it can be determined that the RB corresponding to the intersection with {interleaving #2, RB set #1} is a PUSCH resource. (Refer to...) Figure 10 (b) Based on the resource allocation information for PUSCH indicating {interleaving #2, RB set #1 / #2}, it can be determined that the RBs belonging to interleaving #2 in RB sets #1 and #2 are PUSCH resources. In this case, the guard band (i.e., GB#1) between RB sets #1 and #2 can also be used as a PUSCH transmission resource. That is, in some implementations, it can be determined that the RBs corresponding to the intersection {interleaving #2, RB set #1 + RB set #2 + GB#1} are PUSCH resources. In this case, the guard band (i.e., GB#0) adjacent to RB sets #1 and #2 but not existing between RB sets #1 and #2 is not used as a PUSCH transmission resource.

[0116] As described above, to ensure stable support for SL communication, it is advisable to support SL communication in shared spectrum. The SL BWP and SL resource pool described in the SL of a 3GPP-based system, as well as the RB set described in the shared spectrum transmission of a 3GPP-based system, can be reused for SL transmission on the shared spectrum. Hereinafter, the shared spectrum supporting SL transmission will be referred to as SL-U. The implementation of supporting the coexistence of UL / DL transmission and SL transmission in shared spectrum as described in this specification will be described below.

[0117] In some implementations of this specification, one or more SL BWPs can be (pre-)configured within a carrier on a shared spectrum. In some implementations of this specification, SL BWPs can be (pre-configured) to include one or more SL resource pools. In some implementations of this specification, at least one resource pool can be (pre-configured) to include an integer number of RB sets. Here, the RB sets may correspond to approximately 20 MHz. In some implementations of this specification, when a resource pool includes two adjacent RB sets, the RBs within the intra-cell guard band of the two adjacent RB sets can be defined as belonging to the resource pool. In some implementations of this specification, interleaved RB-based transmissions can be configured for PSCCH / PSSCH transmissions of SL BWPs. When the UE is not configured to use interleaved RB-based PSCCH / PSSCH transmissions for SL BWPs, or when consecutive RB-based transmissions are configured, the UE can use consecutive RB-based transmissions to perform PSCCH / PSSCH transmissions.

[0118] In some implementations of this specification, when configuring interleaved RB-based PSCCH / PSSCH transmission on the SL-U, a subchannel can be considered equal to K interleavings. In some implementations, for example, for a 15 kHz subcarrier spacing (SCS), at least K=1 and K=2 can be supported, and for a 30 kHz SCS, at least K=1 can be supported.

[0119] Figure 11 An example of a resource pool structure in the frequency domain for sidelink transmission over shared spectrum is shown. Specifically, Figure 11 The mapping relationship between RB sets, subchannels, and interleaving is shown in the case of 20 MHz bandwidth and 30 kHz SCS RB sets. Figure 11 In the example, for a 20 MHz bandwidth and a 30 kHz SCS, assume the total number of RBs is 51, the number of interleavings is 5, and the number of RBs per interleaving is 10. Figure 11 In the example, when the number of interleavings K=1 for each subchannel, one subchannel corresponds to one interleaving, and one subchannel (or one interleaving) corresponds to 10 RBs.

[0120] For RB-based PSCCH / PSSCH transmissions on shared spectrum, the following sub-channel to interleaving mapping methods can be considered.

[0121] - Option 1: Define and index a single sub-channel within a single RB set, and periodically index across different RB sets within the resource pool (see...) Figure 11 (a)).

[0122] Option 2: Define a single sub-channel within a single RB set, and first index it within that RB set, then incrementally index it across different RB sets within the resource pool (see...). Figure 11 (b)

[0123] Option 3: Define a single subchannel across all RB sets within the resource pool. That is, a single subchannel comprises K interleavings across all RB sets within the resource pool (see...). Figure 11 (c)).

[0124] - Option 4: Define a single subchannel within a single RB set or two adjacent RB sets, and index it first within the RB set, and then incrementally index it across different RB sets within the resource pool.

[0125] - Option 5: Define a single subchannel within a single RB set, and first index it across different RB sets within the resource pool, then incrementally index it across different interleavings within the RB set.

[0126] Considering SL transmissions in non-shared spectrum, in the implementation of this specification, PSCCH in shared spectrum can be specified to be transmitted within a single sub-channel. In this case, the following options can be considered.

[0127] - Option 1: The PSCCH on the shared spectrum can be located within the lowest sub-channel of the lowest RB set of the corresponding PSSCH, where the lowest sub-channel does not need to be completely contained within the lowest RB set.

[0128] - Option 2: The PSCCH on the shared spectrum can be located within each RB set of the corresponding PSSCH.

[0129] Figure 12 Examples of PSCCH / PSSCH transmissions according to some implementations of this specification are shown. Figure 12 In the example, assume a single RB set comprises five interleavings, the number of interleavings per sub-channel is K=1, and the number of RBs used for PSCCH is N. PSCCH =10. Specifically, Figure 12 (a) shows an example of PSCCH / PSSCH transmission when PSSCH is transmitted on sub-channel 0, and Figure 12 (b) shows an example of PSCCH / PSSCH transmission when PSSCH is transmitted on sub-channels 3 and 4.

[0130] When the number N of RBs used for PSCCH PSCCH The number N of RBs in each sub-channel is less than or equal to sch At this time, PSCCH can be transmitted within a single sub-channel. For example, when the UE is configured to perform interleaved RB-based transmissions, it can do so as follows: Figure 12 The PSCCH and corresponding PSSCH are sent as shown.

[0131] In some scenarios, the number N of RBs in the sub-channel sch It can be determined by the number and size of interlacing, and the number N of RBs in PSCCH. PSCCH It can be configured to one of {0, 12, 15, 20, 25}, and PSCCH can be based on N. PSCCH Transmission is performed on some sub-channels. The implementation of the PSCCH resource mapping in this specification will be described below with these scenarios in mind.

[0132] Figure 13 Examples of PSCCH resource mapping in the frequency domain according to some implementations of this specification are shown. Figure 13 In example (a), it is assumed that the number of RBs used for the sub-channels is N. sch =20 and the number of RBs N used for PSCCH PSCCH=10, and Figure 13 In example (b), it is assumed that the number of RBs used for the sub-channels is N. sch =20 and the number of RBs N used for PSCCH PSCCH =15, but the implementation in this specification is not limited to this. That is, when N sch >=N PSCCH At that time, references can be applied. Figure 13 This describes the implementation described in this paper. In some implementations, for a resource pool within an SL BWP, the UE can receive N sub-channels per sub-channel. sch A series of RBs.

[0133] When N sch >=N PSCCH At this time, the PSCCH can be mapped to sub-channels and interleaved according to one of the following methods.

[0134] Alt1. First, perform PSCCH resource mapping on the interleaving index and then on the RB index. For example, refer to... Figure 13 Alt1 of (a) or Figure 13 In (b) at Alt1, the PSCCH is mapped to the lowest sub-channel of the corresponding PSSCH and allocated on the lowest sub-channel as follows: first in ascending order of interleaving index m, then in ascending order of RB index, starting from the lowest interleaving of the lowest sub-channel of the PSSCH. That is, the PSCCH can be mapped starting from the lowest RB index of interleaving index m and allocated in ascending order of RB index, and when the mapping for all RBs of interleaving m is complete, it can be reassigned starting from the lowest RB index of interleaving index (m+1) in ascending order of RB index. The mapping process can be performed until the mapping for all PSCCHs is complete. More specifically, referring to the accompanying figure, in Figure 13 In the Alt1 example in (a), since the PSCCH is mapped starting with RB0 in ascending order of RB indices (RB0 is the lowest RB index within interleaving 0 corresponding to interleaving index 0), the PSCCH can be allocated to 10 RBs (RB0, RB5, RB10, RB15, RB20, RB25, RB30, RB35, RB40, RB45). According to Alt1, frequency domain diversity gain can be maximized, thereby improving the reception quality of the PSCCH. Furthermore, Alt1 maps the PSCCH in a distributed manner in the frequency domain, making it easier to meet the OCB and PSD requirements for shared spectrum.

[0135] >Alt2. PSCCH resource mapping is performed in ascending order of the RB index. For example, see reference Figure 13 (a) Alt2 or Figure 13In (b) Alt2, the PSCCH is mapped to the lowest sub-channel of the corresponding PSSCH and allocated in ascending order of the RB indices on the lowest sub-channel of the PSSCH (starting from the lowest RB of the lowest sub-channel of the PSSCH). For example, in Figure 13 In Alt2 of (a), PSCCH can be sequentially assigned to 10 RBs (RB 0, RB 1, RB 5, RB 6, RB 10, RB 11, RB 15, RB 16, RB 20, RB 21) according to the ascending order of the RB indices, and... Figure 13 In Alt2 of (b), the PSCCH can be sequentially allocated to 15 RBs (RB 0, RB 1, RB 5, RB 6, RB 10, RB 11, RB15, RB 16, RB 20, RB 21, RB 25, RB 26, RB30, RB31, RB35) according to the ascending order of the RB index. According to Alt2, the UE's power consumption can be reduced because the RX UE can monitor the relatively narrow bandwidth used for PSCCH reception.

[0136] >Alt3. The PSCCH is always allocated to the entire sub-channel. In this case, the number N of RBs used for the PSCCH does not need to be configured. PSCCH Alternatively, it can be configured but ignored. That is, for shared spectrum, N can be omitted from the UE's configuration. PSCCH Alternatively, it can be provided but ignored. In some implementations, N for shared spectrum can be implicitly determined based on sub-channel and / or interleaving configuration. PSCCH For example, N can be determined. PSCCH =N sch As another example, N can be determined. PSCCH =N sch / K', where K' can be predefined depending on the value of K (e.g., K'=1 when K=1, K'=2 when K=2), or provided to the UE as 1 or 2 via higher-layer signaling (e.g., RRC signaling). For example, refer to Figure 13 (a) Alt3 or Figure 13 Alt3 of (b) when N is determined and configured PSCCH =N sch At / 2, the PSCCH can be mapped across the lowest index interleaving in the interleaving of the lowest subchannel of the corresponding PSSCH (see [link]). Figure 13 (a) The PSCCH resource mapping structure shown at the top of Alt3), and when N is determined or configured PSCCH =N schAt this time, the PSCCH can be mapped across the entire lowest sub-channel of the corresponding PSSCH. According to Alt3, because it is not necessary to provide the UE with N for the PSCCH for the shared spectrum. PSCCH This can reduce signaling overhead. Furthermore, since the PSCCH is mapped in a distributed manner in the frequency domain, frequency diversity can be maximized.

[0137] >Alt4. The PSCCH resource mapping method can be configured between Alt1 and Alt2. For example, regardless of whether the Alt1 or Alt2 resource mapping method is used, it can be provided to the UE through explicit configuration, or based on N. sch Value or alternatively based on N PSCCH The value is implicitly determined. One of Alt1 and Alt2 can be defined as the default mode, and this can be based on explicit configuration, N... sch Value, N PSCCH Values ​​specify the use of different methods. When one of Alt1 and Alt2 is defined as the default mode and there is no explicit configuration for Alt1 and Alt2, the PSCCH resource mapping method can be determined by the predefined default mode.

[0138] In this specification, mapping the PSCCH to a sub-channel, RB, or interleaving may include mapping the complex-valued modulation symbols in SCI format carried by the PSCCH to the corresponding sub-channel, RB, or interleaving. The TX UE obtains the transmission bits by encoding the SCI format information bits carried on the PSCCH using channel coding based on polar codes, etc. The SCI format transmission bits are b(0),…, b(M). bit -1) can be scrambled, and the scrambled bits can be modulated into complex-valued modulation symbols d(0),…, b(M). symb -1). Here, M bit It is the number of bits sent on the PSCCH, and M symb It is the number of complex-valued modulation symbols determined by the modulation method. For example, when the modulation method used for PSCCH is quadrature phase shift keying (QPSK), M can be determined. symb =M bit / 2.

[0139] Complex-valued symbols carried by the PSCCH for SCI format are mapped to radio resources (e.g., resource elements (k, l)) allocated for PSCCH transmission (and not for DM-RS associated with the PSCCH), starting from the lowest-indexed complex-valued symbol d(0), in ascending order of subcarrier index k (followed by OFDM symbol index l). In this case, according to some implementations of this specification, the subcarrier index k may be increased in the corresponding RB in the order determined by the PSCCH resource mapping method. For example, refer toFigure 13 In Alt1 of (b), in the frequency domain, the multi-valued modulation symbols of the PSCCH can be mapped as follows: starting with the lowest indexed complex-valued symbol d(0), in ascending order of subcarrier indices k within the lowest interleaved RB of the lowest subchannel mapped to the PSCCH, and then in ascending order of subcarrier indices k within the next interleaved RB of the lowest subchannel mapped to the PSCCH. As another example, refer to Figure 14 Alt2 of (b) In the frequency domain, the multi-valued modulation symbols of the PSCCH can be mapped to the radio resources in the lowest sub-channel of the PSSCH as follows: starting from the complex-valued symbol d(0) of the lowest index, in ascending order of the subcarrier index k in the RB of the lowest index of the lowest sub-channel of the PSSCH, and then in ascending order of the subcarrier index k in the RB of the next RB index.

[0140] In some implementations, Alt1 to Alt4 can be applied when transmitting PSCCH in a shared spectrum. These implementations can be applied not only to SL communication in a shared spectrum (i.e., SL communication with shared spectrum channel access) but also to cells or BWPs configured with interleaved RB-based transmissions. For example, in some implementations, Alt1 to Alt4 can be applied when the SCI format carried by the PSCCH includes interleaved-based frequency resource allocation for PSSCH. Alternatively, as another example, Alt1 to Alt4 can be applied to BWPs or resource pools configured to the UE via higher-layer signaling (e.g., RRC signaling) to use interleaved-based frequency domain resource allocation for PSCCH and / or PSSCH. Alternatively, as yet another example, Alt1 to Alt4 can be applied when a subchannel configured for SL transmission is configured to be associated with interleaving.

[0141] In some implementations, Alt2 can be applied regardless of whether the transmission is based on interleaved RBs or consecutive RBs. In some implementations, information about whether the PSCCH and / or PSSCH transmission is based on interleaved RBs or consecutive RBs can be provided to the UE via higher-layer signaling (e.g., RRC signaling). Depending on whether the PSCCH and / or PSSCH transmission is based on interleaved RBs or consecutive RBs, the TX UE and / or RX UE can employ different mapping methods for the PSCCH. For example, when consecutive RB-based transmissions are configured for PSCCH and / or PSSCH, the TX UE can perform PSCCH transmission by mapping the PSCCH based on the PRB index (e.g., in ascending order of the PRB index), and the RX UE can assume that the PSCCH has already been mapped to a subchannel based on the PRB index to perform PSCCH reception. As another example, when interleaved RB-based transmissions are configured for PSCCH and / or PSSCH, the TX UE can map the PSCCH to consecutive VRBs based on VRB indices (e.g., in ascending order of VRB indices), and the RX UE can assume that the PSCCH has already been mapped to sub-channels based on VRB indices when performing PSCCH reception. The VRBs to which the PSCCH is mapped are mapped to PRBs according to predefined rules (in a distributed manner in the frequency domain).

[0142] In the RB of each sub-channel within the resource pool, N is determined according to some implementations of this specification (e.g., Alt1, Alt2, Alt3, or Alt4). PSCCH Each RB can be used as a PSCCH resource candidate within the corresponding sub-channel.

[0143] Figure 2 Examples of the process of performing sidelink transmissions by communication devices according to some implementations of this specification are shown.

[0144] The communication device can receive configuration for SL communication (S1401) via higher-layer signaling (e.g., RRC signaling) from the BS or another communication device. The communication device can be... Figure 2 The first wireless device or Figure 15 The second wireless device. The configuration may include the configuration described above regarding SL communication (e.g., SL BWP configuration, number of sub-channels L, number of RBs N per sub-channel). sub And / or the number N of RBs used for PSCCH PSCCH ) and / or interleaving related configurations.

[0145] The communication device can determine the sub-channels to be used for PSCCH and PSSCH transmission and map the PSCCH and PSSCH to the RBs of the sub-channels (S1403). Specifically, the communication device can map the PSCCH to the RB of the lowest indexed sub-channel (i.e., the lowest sub-channel) according to Alt1, Alt2, Alt3, or Alt4 as described above. The communication device can map the PSSCH to the following resources among the RBs of the sub-channels: resources not used for transmitting PSCCH, associated DM-RS, or phase tracking reference signals (PT-RS).

[0146] The communication device can send the mapped PSCCH and PSSCH to other communication devices (S1405).

[0147] Figure 2 Examples of the process of performing sidelink reception by communication devices according to some implementations of this specification are shown.

[0148] The communication device can receive configuration (S1501) for SL communication via higher-layer signaling (e.g., RRC signaling) from the BS or another communication device. The communication device can be... Figure 2 The second wireless device or ​ The first wireless device. The configuration may include the configuration described above regarding SL communication (e.g., SL BWP configuration, number of sub-channels L, number of RBs N per sub-channel). sub And / or the number N of RBs used for PSCCH PSCCH ) and / or interleaving related configurations.

[0149] According to some implementations of this specification, it is assumed that the PSCCH is mapped and transmitted on the RBs of the sub-channels, and the communication device may attempt to receive the PSCCH. For example, it can be assumed that the PSCCH resource candidates are located in the RBs of each sub-channel within the resource pool configured for the communication device, and N is determined according to some implementations of this specification (e.g., Alt1, Alt2, Alt3, or Alt4). PSCCH On each RB. For example, the communication device can determine N in each sub-channel's RB within the resource pool, according to some implementations of this specification (e.g., Alt1, Alt2, Alt3, or Alt4). PSCCH Perform PSCCH monitoring (S1503) on PSCCH resource candidates on each RB, where monitoring may mean receiving PSCCH resource candidates and decoding PSCCH according to the monitored SCI format.

[0150] According to some implementations of this specification, assuming that the PSSCH is mapped and transmitted on a sub-channel, the communication device can receive and / or decode the PSSCH. For example, when the communication device detects an SCI format (e.g., a first-stage SCI) in a PSCCH resource candidate, the communication device can decode the PSSCH on the sub-channel including the sub-channel to which the PSCCH resource candidate belongs based on the detected SCI format (S1505). The SCI format may include resource allocation information associated with the sub-channel used for PSSCH transmission. The communication device can decode the PSSCH based on the detected SCI format (and / or a second-stage SCI) and the relevant PSSCH resource configuration configured via higher-layer signaling (e.g., RRC signaling). Assuming that the PSSCH has been mapped to resources in the RB of the sub-channel that are not used for the transmission of PSCCH or associated DM-RS or PT-RS, the communication device can receive and / or decode the PSSCH.

[0151] The TX UE can perform operations related to PSCCH transmission according to some implementations of this specification. The TX UE may include at least one transceiver, at least one processor, and at least one computer memory operatively 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 this specification. A processing apparatus for the TX UE may include at least one processor and at least one computer memory operatively 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 this specification. A computer-readable (non-transitory) storage medium may store at least one computer program including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations according to some implementations of this specification. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may include instructions that, when executed, cause (at least one processor) to perform operations according to some implementations of this specification.

[0152] In a TX UE, processing device, computer-readable (non-transitory) storage medium, and / or computer program product, operation may include: mapping a PSCCH carrying an SCI including information about at least one sub-channel of the PSSCH to the lowest sub-channel among the at least one sub-channel; mapping the PSSCH to the lowest sub-channel among the at least one sub-channel; and transmitting the PSCCH and the PSSCH on the mapped at least one sub-channel. Mapping the PSCCH to the lowest sub-channel includes: mapping the PSCCH to RBs within the lowest sub-channel in the frequency domain, based on the at least one sub-channel associated with one or more interleavings, first in ascending order of interleaving index and then in ascending order of RB index. Each of the at least one sub-channels is associated with one or more interleavings.

[0153] In some implementations, the operation may include receiving a BWP configuration for the BWP used in the SL. The BWP configuration may include sub-channel related configuration. The sub-channel related configuration may include information about the number of sub-channels within the BWP and information about the number of consecutive RBs for each sub-channel.

[0154] In some implementations, the BWP configuration may also include information about the number of RBs used for PSCCH transmission.

[0155] In some implementations, the number of RBs in the lowest subchannel can be greater than the number of RBs used for PSCCH transmission.

[0156] In some implementations, the operation may include determining that the at least one subchannel is associated with one or more interleavings based on an interleaving-based frequency domain resource allocation configured for the frequency band including the at least one subchannel.

[0157] In some implementations, each of the one or more interleavings may consist of multiple non-contiguous RBs in the frequency domain.

[0158] The RX UE can perform operations related to PSCCH reception according to some implementations of this specification. The RX UE may include at least one transceiver, at least one processor, and at least one computer memory operatively 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 this specification. A processing apparatus for the RX UE may include at least one processor and at least one computer memory operatively 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 this specification. A computer-readable (non-transitory) storage medium may store at least one computer program including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations according to some implementations of this specification. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may include instructions that, when executed, cause (at least one processor) to perform operations according to some implementations of this specification.

[0159] In an RX UE, processing device, computer-readable (non-transitory) storage medium, and / or computer program product, operation may include: receiving a PSCCH carrying an SCI within a subchannel; and, based on the SCI, receiving a PSSCH on at least one subchannel with the subchannel receiving the PSCCH as the lowest subchannel. Receiving the PSCCH may include: based on the at least one subchannel associated with one or more interleavings, assuming that the PSCCH is first mapped to RBs within the lowest subchannel in ascending order of interleaving index and then in ascending order of RB index in the frequency domain.

[0160] In some implementations, the operation may include receiving a BWP configuration for the BWP used in the SL. The BWP configuration includes sub-channel related configuration. The sub-channel related configuration includes information about the number of sub-channels within the BWP and information about the number of consecutive RBs for each sub-channel.

[0161] In some implementations, the BWP configuration may also include information about the number of RBs used for PSCCH transmission.

[0162] In some implementations, the number of RBs within the lowest subchannel can be greater than the number of RBs used for PSCCH transmission.

[0163] In some implementations, the operation may include determining that the at least one subchannel is associated with the one or more interleavings based on an interleaving-based frequency domain resource allocation configured for the frequency band including the at least one subchannel.

[0164] In some implementations, each of the one or more interleavings consists of a plurality of non-contiguous RBs in the frequency domain.

[0165] As described above, the examples disclosed in this specification are provided to enable those skilled in the art to implement and practice this specification. While the above description has been provided with reference to embodiments thereof, those skilled in the art can modify and change embodiments thereof in various ways. Therefore, this specification is not intended to be limited to the examples described herein, but rather to provide the widest scope consistent with the principles and novel features disclosed herein.

[0166] The implementation of this specification can be used in wireless communication systems including BS, user equipment, and other devices.

Claims

1. A method for transmitting a channel in a wireless communication system by a communication device, the method comprising: A physical control channel carrying control information, including information about at least one sub-channel of the physical shared channel, is mapped to the lowest sub-channel among the at least one sub-channel; Map the physical shared channel to the at least one sub-channel; as well as Transmit the physical shared channel and the physical control channel on at least one mapped sub-channel. Mapping the physical control channel to the lowest sub-channel includes: based on the at least one sub-channel associated with one or more interleavings, mapping the physical shared channel to RBs within the lowest sub-channel in the frequency domain, first in ascending order of the interleaving index and then in ascending order of the resource block (RB) index; Each of the at least one subchannel is associated with one or more interleavings.

2. The method of claim 1, wherein the method includes receiving a bandwidth portion (BWP) configuration for direct communication between communication devices. in, The BWP configuration includes sub-channel related configuration, and The subchannel-related configuration includes information about the number of subchannels within the BWP and information about the number of consecutive RBs for each subchannel.

3. The method according to claim 2, wherein, The BWP configuration also includes information about the number of RBs used for physical control channel transmission.

4. The method according to claim 3, wherein, The number of RBs in the lowest sub-channel is greater than the number of RBs used for physical control channel transmission.

5. The method of claim 1, wherein the method includes determining that the at least one subchannel is associated with one or more interleavings based on an interleaving-based frequency domain resource allocation configured for a frequency band including the at least one subchannel.

6. The method according to claim 1, wherein, Each of the one or more interleavings consists of a plurality of non-contiguous RBs in the frequency domain.

7. A method for receiving a channel in a wireless communication system by a communication device, the method comprising: The physical control channel carrying control information is received within the sub-channel; as well as Based on the control information, a physical shared channel is received on at least one sub-channel, with the sub-channel that receives the physical control channel as the lowest sub-channel. Receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to the RB within the lowest sub-channel in the frequency domain according to the ascending order of the interleaving index and then according to the ascending order of the resource block (RB) index, receiving the physical control channel, and Each of the at least one subchannel is associated with one or more interleavings.

8. The method according to claim 7, wherein the method comprises: Receive the bandwidth portion (BWP) configuration for direct communication between communication devices. The BWP configuration includes sub-channel related configuration, and The subchannel-related configuration includes information about the number of subchannels within the BWP and information about the number of consecutive RBs for each subchannel.

9. The method according to claim 8, wherein, The BWP configuration also includes information about the number of RBs used for physical control channel transmission.

10. The method according to claim 9, wherein, The number of RBs in the lowest sub-channel is greater than the number of RBs used for the transmission of the physical control channel.

11. The method of claim 7, the method comprising determining that the at least one subchannel is associated with the one or more interleavings based on an interleaving-based frequency domain resource allocation configured for a frequency band including the at least one subchannel.

12. The method according to claim 7, wherein, Each of the one or more interleavings consists of a plurality of non-contiguous RBs in the frequency domain.

13. A communication device for transmitting a channel in a wireless communication system, the communication device comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation. The operation includes: A physical control channel carrying control information, including information about at least one sub-channel of the physical shared channel, is mapped to the lowest sub-channel among the at least one sub-channel; Mapping the physical shared channel to the at least one sub-channel; and The physical control channel and the physical shared channel are transmitted on at least one mapped sub-channel. Mapping the physical control channel to the lowest sub-channel includes: based on the at least one sub-channel associated with one or more interleavings, mapping the physical control channel to RBs within the lowest sub-channel in the frequency domain, first in ascending order of the interleaving index and then in ascending order of the resource block (RB) index; Each of the at least one subchannel is associated with one or more interleavings.

14. A computer-readable non-transitory storage medium, the computer-readable non-transitory storage medium comprising at least one computer program that causes at least one processor to perform operations, wherein, The operation includes: A physical control channel carrying control information, including information about at least one sub-channel of the physical shared channel, is mapped to the lowest sub-channel among the at least one sub-channel; Mapping the physical shared channel to the at least one sub-channel; and The physical control channel and the physical shared channel are transmitted on at least one mapped sub-channel. Mapping the physical control channel to the lowest sub-channel includes: based on the at least one sub-channel associated with one or more interleavings, mapping the physical control channel to RBs within the lowest sub-channel in the frequency domain, first in ascending order of the interleaving index and then in ascending order of the resource block (RB) index; Each of the at least one subchannel is associated with one or more interleavings.

15. A communication device for receiving a channel in a wireless communication system, the communication device comprising: At least one transceiver; At least one processor; as well as At least one memory, operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation. The operation includes: The physical control channel carrying control information is received within the sub-channel; and Based on the control information, a physical shared channel is received on at least one sub-channel, with the sub-channel that receives the physical control channel as the lowest sub-channel. Receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to the RB within the lowest sub-channel in the frequency domain according to the ascending order of the interleaving index and then according to the ascending order of the resource block (RB) index, receiving the physical control channel, and Each of the at least one subchannel is associated with one or more interleavings.

16. A computer-readable non-transitory storage medium, the computer-readable non-transitory storage medium comprising at least one computer program that causes at least one processor to perform operations, wherein, The operation includes: The physical control channel carrying control information is received within the sub-channel; and Based on the control information, a physical shared channel is received on at least one sub-channel, with the sub-channel that receives the physical control channel as the lowest sub-channel. Receiving the physical control channel includes: based on the at least one sub-channel associated with one or more interleavings, assuming that the physical control channel is first mapped to the RB within the lowest sub-channel in the frequency domain according to the ascending order of the interleaving index and then according to the ascending order of the resource block (RB) index, receiving the physical control channel, and Each of the at least one subchannel is associated with one or more interleavings.

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