Method and apparatus for performing sidelink communication in wireless communication system

Abstract

A method for a terminal to set a sidelink resource pool in a wireless communication system includes: receiving resource pool configuration information from a base station based on an upper layer signaling; and performing sidelink communication with another terminal based on the resource pool configuration information, wherein the resource pool configuration information may be information based on a sidelink resource pool configuration of an unlicensed frequency band.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for performing sidelink communication in a wireless communication system. Background Art

[0003] The International Telecommunication Union (ITU) has developed the International Mobile Telecommunications (IMT) framework and standards. Likewise, ongoing discussions on 5th generation (5G) communications are ongoing through a process called “IMT for 2020 and beyond”.

[0004] In order to meet the requirements requested by "IMT for 2020 and beyond", various proposals have been made to support various numerologies regarding time-frequency resource unit standards by considering various scenarios, service requirements, and potential system compatibility in the 3rd Generation Partnership Project (3GPP) New Radio (NR) system.

[0005] In addition, to overcome the adverse channel environment such as high path loss, phase noise and frequency offset that occurs at high carrier frequencies, the NR system can support the transmission of physical signals / channels through multiple beams. In this way, the NR system can support a variety of applications, such as enhanced mobile broadband (eMBB), massive machine type communication (mMTC) / ultra-machine type communication (uMTC), and ultra-reliable and low-latency communication (URLLC).

[0006] In addition, vehicle-to-everything (V2X) communication may be considered, i.e., a communication method for exchanging or sharing road infrastructure and information (e.g., traffic conditions) by communicating with other vehicles during driving. V2X may include, for example, vehicle-to-vehicle (V2V) (which may refer to Long Term Evolution (LTE)-based / New Radio (NR)-based communication between vehicles), vehicle-to-pedestrian (V2P) (which may refer to LTE-based / NR-based communication between a vehicle and a user equipment (UE) carried by a user), and vehicle-to-infrastructure / network (V2I / N) (which may refer to LTE-based / NR-based communication between a vehicle and a roadside unit (RSU) / network). The RSU may be a transportation infrastructure entity configured by a base station or a fixed UE, such as an entity that sends speed notifications to a vehicle. Summary of the invention Technical Topics

[0008] The technical subject matter of the present disclosure relates to a method and apparatus for performing side link (SL) communication in a wireless communication system.

[0009] The technical subject matter of the present disclosure relates to a method and apparatus for configuring a SL resource pool in an unlicensed band.

[0010] The technical subject matter of the present disclosure relates to a method and apparatus for indicating an SL resource pool configured in an unlicensed band.

[0011] The technical subject matter of the present disclosure relates to a method and apparatus for configuring a SL resource pool in an unlicensed band in consideration of region-specific regulations.

[0012] The technical subject matter of the present disclosure relates to a method and apparatus for satisfying minimum occupied channel bandwidth control based on an interlace-based resource pool configuration.

[0013] Technical subjects that can be implemented from the present disclosure are not limited to the above-mentioned technical subjects, and other technical subjects not described herein can be clearly understood by ordinary technicians in the field to which the present disclosure belongs based on the following description.

[0014] Technical Solution

[0015] According to one aspect of the present disclosure, a method for allocating sidelink resources by a user equipment (UE) in a wireless communication system is provided.

[0016] According to one aspect of the present disclosure, a method for configuring a side link resource pool to a UE in a wireless communication system includes: the UE receives resource pool configuration information from a base station based on higher layer signaling; and based on the resource pool configuration information, performs side link communication with another UE base station, wherein the resource pool configuration information may be information on a side link resource pool configuration based on an unlicensed frequency band.

[0017] In addition, according to one aspect of the present disclosure, when the UE performs sidelink communication in a single resource block set (RBS) based on a single sidelink bandwidth part (SL BWP) in a single carrier bandwidth, the UE may perform the sidelink communication based on first resource pool configuration information.

[0018] In addition, according to one aspect of the present disclosure, the first resource pool configuration information may include at least one of the following: information about an interleaving-based side link resource pool configuration state and interleaving-based subchannel index information associated with the resource pool.

[0019] In addition, according to one aspect of the present disclosure, when the UE performs sidelink communication in a plurality of RBSs based on a single SL BWP in a single carrier bandwidth, the UE may perform the sidelink communication based on second resource pool configuration information.

[0020] In addition, according to one aspect of the present disclosure, the second resource pool configuration information may include at least one of the following: information about an interleaving-based side link resource pool configuration state and interleaving-based subchannel index information associated with the resource pool.

[0021] In addition, according to one aspect of the present disclosure, the second resource pool configuration information may further include at least one of the following: RBS index list information and RBS number information associated with the resource pool.

[0022] Technical Effects

[0023] According to the present disclosure, a method of performing side link (SL) communication in a wireless communication system may be provided.

[0024] According to the present disclosure, a method of configuring a SL resource pool in an unlicensed band may be provided.

[0025] According to the present disclosure, a method of indicating a SL resource pool configured in an unlicensed band may be provided.

[0026] According to the present disclosure, a method for configuring an SL resource pool in an unlicensed band in consideration of region-specific regulation may be provided.

[0027] According to the present disclosure, a method for satisfying minimum occupied channel bandwidth control based on an interleaving-based resource pool configuration may be provided.

[0028] Effects achievable from the present disclosure are not limited to the above-described effects, and other effects not described herein may be clearly understood by a person of ordinary skill in the art to which the present disclosure pertains from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 An example of describing a New Radio (NR) frame structure to which the present disclosure is applicable is shown.

[0031] Figure 2 The NR resource structure to which the present disclosure is applicable is shown.

[0032] Figure 3 The NR side link time slot structure to which the present disclosure is applicable is shown.

[0033] Figure 4 NR side link frequencies to which the present disclosure can be applied are shown.

[0034] Figure 5 The NR side link resource pool configuration to which the present disclosure can be applied is shown.

[0035] Figure 6An unlicensed frequency band for each area used for NR sidelink communication to which the present disclosure is applicable is shown.

[0036] Figure 7 The use of a 5 gigahertz (GHz) unlicensed frequency band to which the present disclosure may be applied is shown.

[0037] Figure 8 A method of increasing bandwidth in consideration of power spectral density (PSD) limitations to which the present disclosure may be applied is shown.

[0038] Fig. 9 A method of configuring a guard band in consideration of a shared frequency band within a cell to which the present disclosure can be applied is shown.

[0039] Fig.10 A single resource block set (RBS) operation to which the present disclosure may be applied is shown.

[0040] Fig.11 A method of indicating an interleaving structure of a resource pool in a single RBS to which the present disclosure may be applied is shown.

[0041] Fig.12 A method for configuring resource pools in multiple RBSs to which the present disclosure can be applied is shown.

[0042] Fig.13 A method of indicating interleaving-based resource pool configuration on a plurality of RBSs for broadband operation to which the present disclosure may be applied is shown.

[0043] Fig.14 A method of indicating interleaving-based resource pool configuration on a plurality of RBSs for broadband operation to which the present disclosure may be applied is shown.

[0044] Fig.15 A method of indicating interleaving-based resource pool configuration on a plurality of RBSs for broadband operation to which the present disclosure may be applied is shown.

[0045] Fig.16 A side link resource pool configuration method for an unlicensed band to which the present disclosure can be applied is shown.

[0046] Fig.17 is a diagram showing a base station device and a terminal device to which the present disclosure can be applied. DETAILED DESCRIPTION

[0048] Various examples of the present disclosure will be described more fully below with reference to the accompanying drawings so that those skilled in the art to which the present disclosure pertains can easily implement these examples. However, the present disclosure may be implemented in various forms and is not limited to the examples described herein.

[0049] When describing examples of the present disclosure, detailed descriptions of known configurations or functions may be omitted for clarity and conciseness. Throughout the drawings and detailed description, unless otherwise specified, the same reference numerals are understood to refer to the same elements, features, and structures.

[0050] It will be understood that when an element is referred to as being "connected to," "coupled to," or "accessed to" another element, it may be directly connected, coupled to, or accessed to the other element, or intervening elements may be present. Furthermore, it will be understood that when an element is described as "including / comprising" or "having" another element, it specifies the presence of the other element, but does not preclude the presence of the other element described in other ways.

[0051] In addition, terms such as first, second, etc. can be used to describe the elements in the description herein. These terms are used to distinguish an element from another element. Therefore, the terms do not limit the elements, arrangement order, or sequence, etc. Therefore, the first element in one example can be referred to as the second element in another example. Likewise, the second element in one example can be referred to as the first element in another example.

[0052] Here, providing distinguishing elements is only for the purpose of clearly explaining each feature, and does not mean that the elements must be separated from each other. That is, multiple elements can be integrated into a single hardware or software unit. Moreover, a single element can be distributed to multiple hardware or software units. Therefore, unless otherwise described, integrated or distributed examples are also included in the scope of this disclosure.

[0053] Here, the elements described in various examples may not necessarily be necessary and may be partially optional. Therefore, examples including a partial set of elements described in the examples are also included in the scope of this disclosure. In addition, examples including another element other than the elements described in various examples are also included in the scope of this disclosure.

[0054] The description described herein relates to a wireless communication network, and operations performed in the wireless communication network may be performed in a process in which a system (eg, base station) controlling the wireless network controls the network and transmits data, or may be performed in a user equipment.

[0055] Obviously, in a network including a base station and a plurality of network nodes, various operations performed for communicating with a UE may be performed by the base station or other network nodes other than the base station. Here, the term "base station (BS)" may be used interchangeably with other terms, such as a fixed station, a Node B, an eNodeB (eNB), a gNodeB (gNB), and an access point (AP). In addition, the term "terminal" may be used interchangeably with other terms, such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and a non-AP station (non-AP STA).

[0056] Here, sending or receiving a channel includes the meaning of sending or receiving information or signals through the corresponding channel. For example, sending a control channel means sending control information or signals through the control channel. Similarly, sending a data channel means sending data information or signals through the data channel.

[0057] In the following description, although the term “New Radio (NR) system” is used to distinguish a system according to various examples of the present disclosure from an existing system, the scope of the present disclosure is not limited thereto.

[0058] The New Radio (NR) system supports various subcarrier spacings (SCS) by considering various scenarios, service requirements, potential system compatibility, etc. In addition, in order to overcome the adverse channel environment such as high path loss, phase noise, and frequency offset that occur at high carrier frequencies, the NR system can support the transmission of physical signals / channels through multiple beams. In this way, the NR system can support a variety of applications, such as enhanced mobile broadband (eMBB), massive machine type communication (mMTC) / ultra machine type communication (uMTC), and ultra-reliable and low-latency communication (URLLC).

[0059] Here, 5G mobile communication technology can be defined by including the existing advanced long term evolution (LTE-A) system and the above-mentioned NR system. That is, 5G mobile communication technology can be operated by considering backward compatibility with previous systems and newly defined NR systems. Therefore, subsequent 5G mobile communication may include technologies based on NR system operation and technologies based on previous systems (e.g., LTE-A, LTE), but is not limited to a specific system.

[0060] First, the physical resource structure of the NR system to which the present disclosure is applied will be briefly described.

[0061] Figure 1 An example of an NR frame structure according to an example of the present invention is shown.

[0062] In NR, the basic unit of time domain can be T c =1 / (Δf max ·Nf ). Here, Δf max =480·10 3 And N f =4096. In addition, κ = T s / T c =64 may be a constant related to the multiple relationship between the NR time unit and the LTE time unit. In LTE, T s =1 / (Δf ref ·N f,ref ),Δf ref =15·10 3 And N f,ref = 2048 can be defined as a reference time unit. The constant of the multiple relationship between the NR time basic unit and the LTE time basic unit can be defined as k = T s / T c =64.

[0063] Reference Figure 1 , which may include a time structure of a frame for downlink / uplink (DL / UL) transmission, which may include T f =(Δf max N f / 100)·T s = 10 ms. Here, a single frame may include a time corresponding to T sf =(Δf max N f / 1000)·T s = 10 subframes of 1 ms. The number of consecutive OFDM symbols per subframe can be In addition, each frame may be divided into two half frames, and the half frame may include subframes 0 to 4 and subframes 5 to 9. Here, half frame 1 may include subframes 0 to 4, and half frame 2 may include subframes 5 to 9.

[0064] N TA Denotes the timing advance (TA) between downlink (DL) and uplink (UL). Here, according to the following equation 1, the transmission timing of the uplink transmission frame i is determined based on the downlink reception timing at the UE.

[0065] [Equation 1]

[0066] T TA =(N TA +N TA,offset )T c

[0067] N TA,offset Indicates the TA offset value due to duplex mode differences, etc. Basically, in frequency division duplex (FDD), N TA,offset= 0. In time division duplex (TDD), N can be defined by considering the margin of DL-UL switching time. TA,offset For example, in TDD (Time Division Duplex) of RF1 (Frequency Range 1) (which is a frequency below 6 GHz or lower), N TA,offset It can be 39936T C or 2600T C .39936T C =20.327μs and 25600T C =13.030μs. In addition, in FR2 (frequency range 2) of millimeter wave (mmWave), N TA,offset It can be 13792T C At this time, 39936T C =7.020μs.

[0068] Figure 2 The NR resource structure to which the present disclosure is applicable is shown.

[0069] Resource elements within a resource grid may be indexed based on each subcarrier spacing. Here, a single resource grid may be generated for each antenna port and each subcarrier spacing. Uplink / downlink transmission and reception may be performed based on the corresponding resource grid.

[0070] A resource block (RB) in the frequency domain is configured with 12 REs, and for every 12 REs, an RB index (n PRB ). The index of the RB may be used within a specific frequency band or system bandwidth. The index of the RB may be defined as shown in the following equation 2. Here, N RB sc represents the number of subcarriers in each RB, and k represents the subcarrier index.

[0071] [Equation 2]

[0072]

[0074] The digital parameter configuration can be configured differently to meet various services and requirements of the NR system. For example, one subcarrier spacing (SCS) can be supported in the LTE / LTE-A system, but multiple SCSs can also be supported in the NR system.

[0075] The new digital parameter configuration of the NR system supporting multiple SCSs can operate in a frequency range or carrier such as 3 GHz or less, 3 GHz-6 GHz, 6 GHz-52.6 GHz or more to solve the problem that a wide bandwidth cannot be obtained in a frequency range or carrier such as 700 MHz or 2 GHz.

[0076] Table 1 below shows an example of digital parameters supported by the NR system.

[0077] [Table 1]

[0078] μ <![CDATA[Δf=2 μ ·15[kHz]]]> Cyclic prefix 0 15 Normal 1 30 Normal 2 60 Normal, extended 3 120 Normal 4 240 Normal

[0079] Referring to Table 1 above, the digital parameter configuration may be defined based on the SCS used in the OFDM system, the cyclic prefix (CP) length, and the number of OFDM symbols per time slot. The above values ​​may be provided to the UE through higher layer parameters DL-BWP-mu and DL-BWP-cp for the downlink, and through higher layer parameters UL-BWP-mu and UL-BWP-cp for the uplink.

[0080] In the above Table 1, if μ=2 and SCS=60 kHz, normal CP and extended CP may be applied. In other frequency bands, only normal CP may be applied.

[0081] Here, a normal slot may be defined as a basic time unit for sending a single piece of data and control information in an NR system. The length of a normal slot may basically include 14 OFDM symbols. In addition, unlike a slot, a subframe may have an absolute time length corresponding to 1ms in an NR system and may be used as a reference time for the length of another time segment. Here, for the coexistence and backward compatibility of LTE and NR systems, the NR standard may require a time segment such as an LTE subframe.

[0082] For example, in LTE, data may be transmitted based on a transmission time interval (TTI) as a unit time. TTI may include at least one subframe unit. Here, even in LTE, a single subframe may be set to 1 ms and may include 14 OFDM symbols (or 12 OFDM symbols).

[0083] In addition, in the NR system, non-slots can be defined. Non-slots may refer to slots having at least one less symbol than the number of symbols of ordinary slots. For example, in the case of providing low latency such as ultra-reliable and low-latency communication (URLLC) services, latency can be reduced by non-slots having a smaller number of slots than the number of slots of ordinary slots. Here, the number of OFDM symbols included in the non-slots can be determined based on the frequency range. For example, non-slots having a length of 1 OFDM symbol in a frequency range of 6 GHz or higher can be considered. As another example, the number of symbols used to define a non-slot may include at least two OFDM symbols. Here, the number range of OFDM symbols included in the non-slots can be configured to have a micro-slot length of up to (ordinary slot length) -1. Here, although the number of OFDM symbols can be limited to 2, 4 or 7 as a non-slot standard, it is provided only as an example.

[0084] In addition, for example, SCS corresponding to μ = 1 and 2 can be used in unlicensed bands of 6 GHz or less, and SCS corresponding to μ = 3 and 4 can be used in unlicensed bands above 6 GHz. Here, for example, if μ = 4, it can be used for synchronization signal blocks (SSBs).

[0085] [Table 2]

[0086]

[0087] Table 2 shows the number of OFDM symbols per time slot for a normal CP set by subcarrier spacing. The number of time slots per frame and the number of time slots per subframe In Table 2, the values ​​are based on a normal slot with 14 OFDM symbols.

[0088] [Table 3]

[0089]

[0090] In Table 3, in the case where extended CP is applied (ie, μ=2 and SCS=60 kHz), the number of slots per frame and the number of slots per subframe based on normal slots where the number of OFDM symbols per slot is 12 are shown.

[0091] As described above, a single subframe may correspond to 1 ms on the time axis. Moreover, a single time slot may correspond to 14 symbols on the time axis. For example, a single time slot may correspond to 7 symbols on the time axis. Therefore, the number of time slots and the number of symbols that may be considered may be set differently within 10 ms corresponding to a single radio frame. Table 4 may show the number of time slots and the number of symbols according to each SCS. Although an SCS of 480 kHz may not be considered in Table 4, the present disclosure is not limited to such an example.

[0092] [Table 4]

[0093] SCS Time slot within 10ms Time slot within 10ms Symbols within 10ms 15kHz 10 20 140 30kHz 20 40 280 60kHz 40 80 560 120kHz 80 N / A 1120 240kHz 160 N / A 2240 480kHz 320 N / A 4480

[0095] The V2X service may support a set of basic requirements for V2X services. These requirements are basically designed with full consideration of road safety services. Here, the V2X UE may exchange autonomous state information via the SL. The V2X UE may also exchange information with infrastructure nodes and / or pedestrians.

[0096] The V2X service (e.g., LTE Rel-15) may support at least one of: carrier aggregation in SL, high order modulation, latency reduction, transmit (Tx) diversity, and sTTI (transmission time interval). To this end, new features may be applied to V2X communication. More specifically, a V2X UE may operate in consideration of coexistence with other V2X UEs. For example, a V2X UE may use the same resource pool as other V2X UEs.

[0097] For example, by considering the use case for supporting V2X services as system aspect (SA) 1, the technical features can be classified mainly based on the four categories represented by Table 5 below, but not limited thereto. In Table 5, "vehicle platooning" may be a technology that enables multiple vehicles to dynamically form a group and operate similarly. "Extended sensor" may be a technology that enables the exchange of data collected from sensors or video images. "Advanced driving" may be a technology that enables a vehicle to drive based on semi-automation or fully automation. "Remote driving" may be a technology for remotely controlling a vehicle and a technology for providing an application. Based on this, further description related thereto is given through Table 5 below.

[0098] [Table 5]

[0099]

[0100] In addition, SA1 can support the case of operating in various systems (such as LTE and NR) because enhanced V2X (eV2X) supports technology for supporting the V2X service. For example, the NR V2X system can be the first V2X system. In addition, the LTE V2X system can be the second V2X system. That is, the NR V2X system and the LTE V2X system can be different V2X systems.

[0101] The following describes a method for satisfying the low latency and high reliability required in the NR SL based on the NR V2X system. However, the same or similar composition can be extended and applied to the LTE V2X system, and includes but is not limited to the following examples. That is, in the LTE V2X system, the present disclosure can be applied to the interactive part.

[0102] Here, the NR V2X capability may not be limited to basically supporting only V2X services, and the V2X RAT to be used may be selected.

[0103] In addition, new service requirements for public safety and commercial use cases of NR V2X services may be further considered. For example, the use cases may include, but are not limited to, at least one of the following: more advanced V2X services, public safety services, network control interactive services (NCIS), railway gap analysis (MONASTERYEND), enhanced relay for energy efficient and extensive coverage (REFEC), and audio-visual service production (AVPROD) certification.

[0104] Physical channels, signals, basic time slot structures and physical resources may be configured for NR V2X. Here, the NR physical SL shared channel (NR PSSCH) may be a physical layer NR SL data channel. V2X UEs may exchange data and control information (e.g., 2nd SCI, CSI) through the NR PSSCH. The NR physical SL control channel (NR PSCCH) may be a physical layer NR SL control channel. NRPSCCH refers to a channel for sending scheduling information of the NR SL data channel and control information (1st SL control information (SCI)) including the 2nd SCI indication. That is, the V2X UE may send control information for SL data communication to another V2X UE through the PSCCH. The NR physical SL feedback channel (NR PSFCH) refers to a channel for sending physical layer NR hybrid automatic repeat request (HARQ) feedback information and a channel for sending HARQ-ACK feedback information corresponding to the NR SL data channel (i.e., PSSCH). A V2X UE may send data to another V2X UE and may then receive HARQ feedback information of the corresponding data through the NR PSFCH. NRSL synchronization signal / physical SL broadcast channel (SLSS / PSBCH) block refers to a channel block that sends NR SL synchronization signal and broadcast channel in a single continuous time. Here, SLSS / PSBCH blocks can be periodically sent based on a set of one or more block indexes to support beam-based transmission in the NR band. The synchronization signal includes a primary SL synchronization signal (PSSS) and a secondary SL synchronization signal (SSSS). The synchronization signal is generated based on at least one SLSSID value. NR physical SL broadcast channel (PSBCH) refers to a channel used to send system information required to perform V2X SL communication. NR PSBCH is sent together with SLSS and is periodically sent based on a set of SLS / PSBCH block indices to support beam-based transmission.

[0105] In addition, PSCCH and PSSCH may be defined to support NR V2X. A UE may send SCI to another UE via PSCCH. Here, a Tx UE may send a first SCI (1st SCI, SCI format 1-A) to an Rx UE via PSCCH. The 1st SCI may be used to schedule PSSCH and auxiliary SCI (2nd SCI) within the PSSCH, and the 1st SCI may include priority information, time / frequency resource allocation information, resource reservation information, demodulation reference signal (DMRS) mode information, 2nd SCI format indicator information, 2nd beta-offset indicator information as a parameter for SCI and PSSCH rate matching operation, DMRS port count information, modulation and coding scheme (MCS) information, additional MCS table indicator information (e.g., indicating 64QAM, or 256OAM or one of the URMCSLLC tables), PSFCH overhead indicator information (a parameter for PSSCH rate matching operation with the 2nd SCI), and at least one reserved bit.

[0106] Figure 3 The NR SL time slot structure to which the present disclosure can be applied is shown.

[0107] refer to Figure 3 , a single SL slot (SL slot) includes a single automatic gain control (AGC) symbol. Moreover, a single SL slot includes a single Tx-Rx switching symbol. In a single SL slot, the PSSCH is a channel through which data is transmitted, which is transmitted through at least one subchannel (e.g., Figure 3 In addition, in the time domain, the PSCCH (1st SCI), the 2nd SCI, the PSSCH (data), and the demodulation RS (DMRS) for demodulation may be transmitted to the remaining OFDM symbols except the AGC symbol and the Tx-Rx switching symbol. In detail, the positions of the PSCCH (1st SCI), the 2nd SCI, the PSSCH (data), and the DMRS for demodulation may be the same as Figure 3 The same as in, but not limited to this. For example, in Figure 3 In the example, the PSCCH and the second SCI exist in the first subchannel, and considering this, the PSSCH and the DMRS can be allocated. As another example, the second subchannel refers to a subchannel in which the PSCCH and the second SCI do not exist, and the PSSCH and the DMRS can be allocated as follows: Figure 3 is allocated as in.

[0108] Here, the number of PSSCH DMRS can be configured according to the higher layer configuration, and one or more PSSCH DMRS can be configured according to the channel environment of the UE. PSCCH (1st SCI) uses the DMRS of PSCCH (ie, PSCCH DMRS) for reception and demodulation, and every four resource elements (REs) are equally allocated and transmitted within a single resource block (RB). In contrast, PSSCH DMRS is used to decode the 2nd SCI.

[0109] In addition, for example, a single resource pool associated with NR SL can support frequency division multiplexing (FDM), time division multiplexing (TDM), and space division multiplexing (SDM). This means that each resource in a single resource pool can be divided and used based on frequency, time, and space, which can improve resource efficiency.

[0110] Figure 4 NR SL frequencies to which the present disclosure can be applied are shown. For example, NR SL can operate based on at least one of the following: frequency range 1 (FR1) (below 6 GHz) and frequency range 2 (FR2) (i.e., up to 52.6 GHz), unlicensed ITS bands, and licensed bands. In detail, for example, refer to Figure 4 , 5,855 to 5,925 MHz can be allocated for ITS services (technology neutral manner).

[0111] In addition, NR V2X quality of service (QoS) requirements may be considered. That is, latency, reliability, and data rate may need to be met by predetermined conditions related to the requirements of the NR V2X service. Here, these requirements may be configured as shown in Table 6 below, and Table 7 may show PC5 QoS for NR V2X.

[0112] Here, in order to meet the QoS requirements, access stratum (AS) level QoS management may be required. To this end, HARQ and CSI feedback associated with link adaptation may be required. In addition, each of the NR V2X UEs may have a different maximum bandwidth capability (maximum BW capability). Taking this into account, AS-level information may be exchanged between NR V2X UEs, the AS-level information including at least one of the following: UE capabilities, QoS related information, radio bearer configuration, and physical layer configuration.

[0113] [Table 6]

[0114]

[0115] [Table 7]

[0116] NOTE 1: For standardized PQI to QoS characteristics mapping, this table may be extended / updated to support service requirements of other identified V2X services. Note 2: PQI can be used for services other than V2X.

[0118] In the following, the SL HARQ process is described. Whether the V2X UE is to report HARQ feedback is indicated by a higher layer (e.g., RRC) configuration and SCI signaling (e.g., 2nd SCI). For example, if the V2X UE performs SL communication based on multicast, it can be determined whether to report HARQ feedback based on the distance between the Tx UE and the Rx UE.

[0119] When the V2X UE performs at least one of unicast and multicast transmission, SL HARQ feedback may be enabled or disabled. Here, enabling / disabling HARQ feedback may be determined based on at least one of channel conditions (e.g., RSRP), the distance between the Tx UE and the Rx UE, and QoS requirements.

[0120] In the case of multicast, whether to send HARQ feedback can be determined based on the physical distance between the Tx UE and the Rx UE. Here, when HARQ feedback is performed for multicast transmission via PSSCH, the Rx UE can send a negative response only when the received PSSCH decoding fails. It can be referred to as Option 1 operation. In addition, when HARQ feedback is performed for multicast transmission via PSSCH, the Rx UE can feedback a positive response or a negative response based on whether the PSSCH decoding is successful, and this can be referred to as Option 2 operation. In Option 1 operation where only a negative response is fed back as only NACK HARQ feedback, if the physical distance between the Tx UE and the Rx UE is less than or equal to the communication range requirement, HARQ feedback corresponding to PSSCH reception can be performed. On the contrary, if the physical distance between the Tx UE and the Rx UE is greater than the communication range requirement, the V2X UE may not perform HARQ feedback corresponding to PSSCH reception.

[0121] Here, the location of the Tx UE is indicated to the Rx UE through SCI signaling associated with the PSSCH. The Rx UE may estimate the distance from the Tx UE based on both the information fragment included in the received SCI and its location information, and may operate as described above.

[0122] In addition, when unicast communication is performed based on V2X, the case where SL HARQ feedback is enabled can be considered. The Rx UE can generate and send HARQ ACK / NACK corresponding to the PSSCH according to whether the decoding of the corresponding transport block (TB) is successful.

[0123] Then, the NR SL resource allocation mode refers to a mode in which the base station schedules SL transmission resources. Here, the mode in which the base station schedules SL transmission resources may be mode 1. For example, when the V2X UE is within the coverage of the base station, the V2X UE may receive SL resource information from the base station. On the contrary, there is a mode in which the V2X UE directly determines the resources for SL transmission on the SL resources configured by the base station / network or the pre-configured SL resources. Here, the mode in which the UE directly determines the SL transmission resources may be mode 2.

[0124] In addition, a digital parameter configuration and waveform for the side link may be considered, which may be as shown in Table 8 below. In detail, regarding PSSCH / PSCCH and PSFCH in the side link, the SCS and CP length supported in each of FR1 and FR2 may be as shown in Table 8 below. Here, the waveform may support only OFDM without supporting DFT-S-OFDM, but may not be limited thereto. A side link synchronization signal block (SL-SSB) may be independently defined for each frequency range, which may be similar to NR-Uu.

[0125] [Table 8]

[0126]

[0128] Figure 5 The NR side link (SL) resource pool configuration is shown. Figure 5 , the resource pool may represent resources in time and frequency for sidelink transmission and reception. For example, at least one resource pool may be configured within a single SLBWP within a single carrier. Here, the resources of the resource pool may be configured based on the time resources of a time slot set unit and the frequency resources of a continuous subchannel set unit. In addition, the resource pool may be configured for each of transmission and reception.

[0129] In more detail, as a time resource for resource pool configuration provided in the NR side link, at least one of the following may be configured: a resource pool period (period), a side link time slot set (sl-TimeResource (length = L) within a single resource pool application period, bitmap)), and the first symbol and the number of consecutive symbols in a set of consecutive symbols within a single time slot. As frequency resources, at least one of the following can be configured: the bandwidth of at least one subchannel (for example, sl-SubchannelSize = {10, 15, 20, 25, 50, 75 and 100} RB), the entire bandwidth of the resource pool indicated by the number of consecutive subchannels (a set of consecutive subchannels (for example, sl-NumSubchannel = {1 to 27})), and the position of the first subchannel of the resource pool in the frequency domain (sl-StartRBsubChannel = {0 to 265}). For example, resources in the time domain and frequency domain can be configured based on higher layer parameters. In Figure 5 In the case where the total available RB resources do not completely match the subchannel size (i.e., if it does not reach the number of RBs constituting a single subchannel), the frequency resources corresponding to the excluded resource blocks (RBs) may indicate some remaining RBs. Here, the corresponding resources may not be used in the NR side link. In addition, for example, in the case where multiple units of the length of the bitmap on the time resource (e.g., sl-TimeResource) are not established and cannot be used as NR side link resources, the reserved time slots may indicate the remaining time slots.

[0130] Next, a case where an unlicensed band (unlicensed spectrum) is used for communication between a base station and a UE may be considered. For example, a communication scheme based on an unlicensed band may be a scheme in which communication is performed by competing for an occupied channel and based on the occupied channel. Even for communication between a base station and a UE, communication based on an unlicensed band may be performed. Below, operations based on a case in which an unlicensed band is used for sidelink communication are described. That is, even for sidelink communication as communication between UEs, an unlicensed band may be used. In addition, it is necessary to consider configuring a sidelink resource pool using a sidelink unlicensed band. In more detail, sidelink communication may be performed based on a resource pool. In the case of performing communication via an unlicensed band, the resource pool configuration needs to be configured differently.

[0131] For example, a resource pool for side link communication may be configured based on a time slot unit, and symbols that can be used for the side link within a time slot may be determined, which is similar to Figure 5 In addition, as mentioned above, Figure 5 As described, in the frequency domain, it can be configured based on the number of consecutive subchannels. The above sidelink resource pool configuration can be configured in consideration of unlicensed band communications, which will be described below.

[0132] Figure 6The unlicensed frequency band of each area of ​​NR side link communication to which the present disclosure is applicable is shown. In the above Table 8, the frequency range of NR FR1 may be from 450 MHz to 6 GHz, but the corresponding frequency range may vary from 450 MHz to 7.125 GHz. The frequency range of NR FR1 may be changed for the unlicensed frequency band of the 6 GHz band, but may not be limited thereto.

[0133] For example, the unlicensed frequency band may be located below 1 GHz, 2.4 GHz, 5 GHz, 6 GHz, 37 GHz (US only), and 60 GHz, but may not be limited thereto. Figure 6 For example, in the system, the 5 GHz band may be Band 46 defined as 5150 to 5925 MHz. In addition, for example, for LAA operation, Band 49 (3550-3700 MHz) may be defined as Citizens Broadband Radio Service (CBRS), but is not limited thereto.

[0134] Figure 7 The use of the 5 GHz unlicensed frequency band to which the present disclosure can be applied is shown. Figure 7 , each frequency band within the 5GHz unlicensed frequency band can be set, and based on this, the use of the unlicensed frequency band can be set. For example, it can be divided into 20MHz units, and each 20MHz can be a single channel.

[0135] Here, the low frequency band of 5150 to 5350 MHz within the above frequency band is specified in most areas to have a maximum transmission power of 23 dBm for indoor use. Also, in the frequency band of 5470 MHz or higher, it is used in areas with a transmission power of up to 30 dBm, and is used for outdoor use in most areas. Here, for example, there may be additional requirements in some areas, which are given as effective isotropic radiated power (EIRP) values ​​based on the following Table 9, and the maximum transmission power is limited.

[0136] [Table 9]

[0137]

[0138] Here, the power spectral density (PSD) may indicate that the device is limited to performing full power transmission within the reference bandwidth. As a detailed example, European regulations may limit the PSD to 10dBm / MHz. Therefore, in a non-20MHz bandwidth, the device may not perform transmission at the maximum transmit power of 23dBm.

[0139] Figure 8 The present disclosure is applicable to increase the bandwidth by taking into account the PSD limitation. Figure 8As shown, a small data transmission situation that only requires a small bandwidth can be considered. Here, in the case of performing small data transmission through a wide bandwidth, the coverage can be extended. In addition, the minimum bandwidth occupancy control can be satisfied by transmission with the help of a wide bandwidth. In view of this, for small data, a method of performing transmission in a wide bandwidth may be preferred.

[0140] In addition, for example, in the case of occupying a channel through a channel access process in an unlicensed band, a maximum channel occupancy time (COT) corresponding to the maximum allowable occupation time may be set differently for each region. For example, Japan allows a maximum COT of up to 4 ms, while Europe allows a maximum COT of up to 8 ms or 10 ms. However, this is merely an example and is not limited to the above embodiments. In addition, for example, Europe may support framework base equipment (FBE) and load base equipment (LBE) rules. Here, FBE may be set to high performance radio (LAN HiperLAN) / 2, and LBE may be adopted and applied according to Wi-Fi standard specifications, and both may be supported in NR as a new communication system.

[0141] In addition, for example, the minimum occupied bandwidth may be a bandwidth control that requires minimum occupancy when channel access is successful once. For example, the minimum occupied bandwidth control may be configured to occupy 80% to 90% or more of the nominal channel BW. As a detailed example, when the UE transmits a PUSCH to the base station in an unlicensed band, it may request that resources for the PUSCH be allocated in an interleaved form in a specific bandwidth, but may not be limited to the corresponding embodiments.

[0142] In addition, regulation on dynamic frequency selection may be regulation that limits bandwidth usage for the purpose of protecting a system (e.g., radio) with a high priority for using an unlicensed band. In addition, transmit power control regulation may be regulation that limits transmit power to a value much lower than the maximum transmit power value allowed for use. In addition, listen-before-talk (LBT) regulation may be regulation on a channel access procedure, and Europe may support FBE and LBE rules. Here, FBE may be Hiperlan / 2, and LBE may be adopted and applied from Wi-Fi standard specifications, and both may be supported in NR.

[0143] In addition, for example, the 5 GHz unlicensed band can be used based on the above description, but the use of the 6 GHz band is being discussed in each country and organization. Here, the 6 GHz band may be a band that is different from 5 GHz and is not used in a mobile system. That is, unlike the 5 GHz band shared by multiple mobile communication systems, the 6 GHz band can be used for a single designated communication system. Therefore, problems or inefficiencies caused by the coexistence of different systems can be reduced.

[0144] Fig. 9 A method of configuring a guard band in consideration of a shared frequency band (eg, an unlicensed frequency band) within a cell, to which the present disclosure may be applied, is shown.

[0145] Reference Fig. 9 To support broadband operation in shared spectrum access, the UE may receive the IntraCellGuardBandsPerSCS parameter for each of the UL carrier and the DL carrier from the base station based on the base station configuration. N subcarriers may be provided to the UE in a single carrier (subcarrier spacing index = μ). RB-set,x -1 cell protection band. Fig. 9 , the UE may receive higher layer signaling for the number of common resource blocks (CRBs) for each guard band and the starting CRB. For example, a CRB may be a resource block defined / configured based on point A, which is the starting position of the transmission bandwidth in the carrier in the frequency domain. The UE may verify the information about point A through base station signaling, and based on this, may identify the CRB position in the frequency domain. Here, each guard band may be based on The parameter is defined as the starting CRB, and in each guard band, the number of CRBs can be based on The UE may receive the aforementioned information through higher layer signaling based on each of the startCRB and nrofCRB parameters. Here, s∈{0,1,…,N RB-set,x -2}, N RB-set,x N represents the number of RB sets, and x can be configured as DL or UL for downlink and uplink. RB-set,x The RB sets may be configured as a resource block set (RBS) within a single carrier through a guard band configuration. For example, the guard band may be configured based on an IntraCellGuardBandsPerSCS parameter, and the RBS may be configured within a single carrier accordingly.

[0146] Here, each RBS frequency bandwidth may correspond to an LBT frequency bandwidth. That is, each RBS may be set to a bandwidth corresponding to the LBT process performed by the base station and the UE. Fig. 9In the example, if LBT is successful in the corresponding area corresponding to the LBT bandwidth, RB set 1 911 and RB set 2 912 may occupy the corresponding frequency band and may perform communication. That is, the RBS may correspond to the LBT bandwidth. For example, a Tx node (e.g., a gNB or a UE) may determine the channel occupancy of the unlicensed band by performing an LBT channel access procedure on an RBS resource corresponding to the LTE bandwidth. When the LBT procedure is successful in a single RBS, the Tx node may perform transmission on the resources corresponding to the RBS.

[0147] Here, each RBS can be defined as a start CRB and an end CRB. The start CRB can be End CRB can be Here, the size of the guard band 913 may be nrofCRB. For example, according to the subcarrier spacing μ and the carrier size It may not be desirable to set the size nrofCRB of guard band 913 to a size smaller than the number of applicable intra-cell guard bands defined in consideration of requirements regarding interference status of a wireless bandwidth.

[0148] Here, the start CRB and the end CRB of each RBS (911, 912) may be determined based on the RBS index, and the RBS index may be s∈{0,1,...,N RB-set,x -1}. That is, the RBS index s can be resource blocks of size, and represents the number of CRBs determined by the start CRB and the end CRB based on the following Equation 3. Also, in each RBS, the start CRB and the end CRB may be as shown in the following Equations 4 and 5.

[0149] [Equation 3]

[0150]

[0151] [Equation 4]

[0152]

[0153] [Equation 5]

[0154]

[0156] For example, if the UE is not provided with the IntraCellGuardBandsPerSCS parameter configuration, the UE can determine the carrier μ and carrier size based on the requirements of the RF standard. In addition, for example, if the above nominal intra-cell guard band and RBS pattern do not include an intra-cell guard band, it can be assumed that the RBS of the corresponding carrier is 1.

[0157] For example, in Fig. 9 In the example, two LBT BWs (RBS 0, RBS 1) may be configured in a single BWP 922 within a single carrier bandwidth. Here, a single guard band 913 may be configured between the two RBSs 911 and 912. The location of each of the two RBSs 911 and 912 may be as follows: Fig. 9 As shown, it is determined based on the above-mentioned higher layer parameters. In addition, for example, when multiple BWPs 921 and 923 are configured within a single carrier bandwidth, the RBS associated with each BWP can be verified. Here, the RBSs corresponding to the first RBS (= s0, 912) and the last RBS (= s1, 911) of each BWP in the RBSs 911 and 912 within the carrier can be indexed by s0 and s1 indexes.

[0158] In the following, a sidelink communication method is described that takes into account advanced V2X service support for sidelinks based on new communication systems (e.g., NR sidelinks) and other services (e.g., public safety, wearable devices). For example, for commercial sidelink applications, requirements for increasing the sidelink data rate and supporting new carrier frequencies need to be considered. Below, a sidelink communication method that takes the same into account is described. As a detailed example, the sidelink data rate may need to be increased to share video information between autonomous vehicles, but it is not limited to this.

[0159] Here, considering the above-mentioned side link requirements, SL carrier aggregation and side link resources in unlicensed bands and the use of side link resources in unlicensed bands may be required. As another example, data rate increase can be supported by improving FR2 band side link operation. Based on the above, since application to more commercial applications becomes possible based on the increased data rate in the side link, it becomes possible to use NR-based side links in a larger market.

[0160] For example, the sidelink frequency of the sidelink operation in the new system (such as NR) may exist in FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), and 52.6 GHz to 71 GHz bands. For example, all unlicensed bands and licensed bands may be considered to determine the sidelink. In addition, the NR sidelink for NR sidelink operation may be applied as a common design in FR1 and FR2, but is not limited thereto. For example, a wireless access scheme for NR sidelink unlicensed carrier operation is described based on a band corresponding to the 5 GHz and 6 GHz unlicensed bands corresponding to FR1 (FR1 unlicensed bands (n46 and n96 / n102)), but may not be limited thereto. In addition, for example, the sidelink may be configured (particularly, for SL data transmission and reception related configuration and SL physical resource allocation) taking into account the availability of an LTE (ng-eNB) / NR (gNB) Uu link, which is a 3GPP NG-RAN. Taking the above into consideration, in the following, the base station may include an ng-eNB or gNB in ​​the NG-RAN. For clarity of description, the ng-eNB or gNB is referred to as a base station, but may not be limited to a specific form.

[0161] Below, a resource pool configuration method for a new side link channel is described so that the NR side link wireless interface can operate in an unlicensed band. As described above, when a device uses an unlicensed band, regulations regarding the maximum transmit power (Max. transmit power) and maximum PSD (e.g., 10 dBm / MHz) limits may be presented differently for each region.

[0162] For example, in an environment where the above-mentioned regulation exists, in the case of only performing small data transmission and narrowband transmission, the data transmission coverage may be reduced. In view of the above situation, in the case of performing side link communication in an unlicensed band, an interleaved resource allocation scheme with transmission resources as the entire bandwidth may be considered. The interleaved resource allocation scheme with transmission resources as the entire bandwidth can meet the occupied channel bandwidth (for example, occupied channel bandwidth in ETSI EN301 893 for 5GHz unlicensed band), which is a regulation related to unlicensed bands in consideration of a specific area (for example, ETSI). Here, as described above, the above-mentioned regulation stipulates that when a single Tx device occupies a channel and performs transmission in an unlicensed band, a transmission including 99% of the transmit power needs to be supported in a bandwidth corresponding to at least 80% to 100% of the declared nominal channel bandwidth. Therefore, the side link unlicensed band (SL-U) that can operate in the corresponding unlicensed band needs to meet the OCB requirements. Below, a new SL-U resource pool configuration and resource allocation method considering the above-mentioned purposes in the NR SL-U band are described.

[0163] For example, the new SL-U resource pool configuration described below can be a resource pool configuration scheme based on interleaving. Here, the SL-U resource pool configuration can be performed by the scheme described below, but may not be limited to this. For example, the SL-U resource pool configuration can be a resource pool configuration scheme based on subchannel unit interleaving, rather than an interleaving-based resource pool configuration scheme using RB units, and an interleaving-based resource pool configuration scheme with any possible unit (e.g., subcarrier / RE, RB, subchannel, RBS) in frequency can be considered. In addition, a scheme based on continuous frequency resource configuration can be applied. In addition, a scheme based on continuous frequency resource configuration can be applied. In addition, an interleaving-based resource pool configuration (e.g., interleaving in units of one or more continuous RE / RB numbers) can be applied in units of some continuous frequency resources. As another example, the SL-U resource pool configuration can be applied similarly to the existing SL resource pool configuration, and the scheme for scheduling frequency resources can be applied in an interleaved manner, which is not limited to a specific embodiment.

[0164] In addition, for example, there may be multiple SL-U resource pool configuration schemes including the following SL-U resource pool configuration schemes for transmission, reception and other various purposes. A specific SL-U resource pool configuration scheme may be provided to the UE through higher layer signaling. Here, the higher layer signaling may include at least one of the following: higher layer signaling from a base station, higher layer signaling from another UE, and a high-level configuration preset within the UE, and is not limited to a specific embodiment. As another example, in a wireless communication system, only the following interleaving-based resource pool configuration scheme may also be used, and is not limited to a specific embodiment.

[0165] That is, although the following describes an interleaving-based SL-U resource pool configuration method in side link communication, the configuration may be performed in various forms without limitation thereto. However, for clarity of description, the description is made based on an interleaving-based SL-U resource pool configuration.

[0166] For example, the sidelink resource pool may be configured by considering time resources and frequency resources. Here, as the time resource, at least one of the following may be configured: a configurable resource pool period, a sidelink time slot set within a configurable single resource pool period (e.g., sl-TimeResource (length = L bitmap )), as well as the first symbol and the number of consecutive symbols of a set of consecutive symbols within a single time slot.

[0167] In addition, as frequency resources, at least one of the following can be configured: the bandwidth of at least one subchannel (e.g., sl-SubchannelSize = {10, 15, 20, 25, 50, 75 and 100} RB), a configurable resource pool bandwidth (a set of consecutive subchannels (e.g., sl-NumSubchannel = {1 to 27})), and the frequency domain position of the first subchannel of the resource pool (e.g., sl-StartRBChannel = {0 to 265}).

[0168] For example, in the case of performing side link communication in an unlicensed band, it may be necessary to consider the unlicensed band to determine the resource pool configuration. In more detail, another wireless access system (e.g., NR-U, LTE LAA, WiFi) may exist in the unlicensed band. That is, it may be considered to share the unlicensed band with other wireless access systems to perform side link communication in the unlicensed band. Here, in the case of performing side link communication based on the unlicensed band, the UE may perform communication after occupying the channel based on the channel access process (e.g., LBE, FBE). Here, the channel access process may be an operation of occupying the corresponding channel during a specific time period. That is, in the case of performing communication in the unlicensed band, there may be restrictions in the time domain based on the channel occupancy period. In view of this, in the case of performing side link communication in the unlicensed band, an additional configuration in the time domain as a side link resource pool may be an unreasonable requirement compared to other wireless access systems. Therefore, it may not be necessary to configure the side link resource pool in the existing time domain in the unlicensed band. Here, the time resource allocation of the side link communication in the unlicensed band can be defined by the channel access process in the same manner as other wireless access systems in the unlicensed band (e.g., NR-U, LTE LAA, WiFi). That is, the side link communication in the unlicensed band can also consider obtaining the unlicensed band resources in the time domain by the same method as the unlicensed band channel access process, and a separate resource pool may not be configured in the time domain, but it may not be limited to this.

[0169] For example, in the case of performing side link resource pool configuration in an unlicensed band, resource pool configuration in the time domain may be performed based on a channel occupation process. For example, the side link resources may be finally determined and / or configured by a resource pool and a channel occupation process, wherein the resource pool is configured by at least one of: a configurable resource pool period, a set of side link time slots within a configurable single resource pool period, and a first symbol and the number of consecutive symbols of a set of consecutive symbols within a single time slot, but may not be limited to a specific embodiment. In detail, the base station / UE may perform a side link operation in an unlicensed band to occupy the corresponding resources by performing a channel occupation process before the time resources indicated based on the information for resource pool configuration.

[0170] However, in the following, for clarity of description, the resource pool in the time domain is not considered, and description related to the resource pool configuration in the frequency domain is made.

[0171] For example, it may be necessary to perform side link resource configuration in an unlicensed band in the frequency domain by considering performing a side link through an unlicensed band. In particular, in an area where the above-mentioned regulation is applied, configuration for satisfying conditions based on regulation may be required, but may not be limited thereto.

[0172] The resource pool for sidelink communication in the unlicensed band may be configured based on an interleaving method.

[0173] In detail, as described above, regulation of unlicensed bands may exist in a specific area. For example, there may be regulation that limits the maximum transmit power and maximum PSD (e.g., 10 dBm / MHz) that a device can use. In an environment where the above-mentioned regulation exists, in the case of performing small data transmission and narrowband transmission, the coverage may be reduced, and an interleaved resource allocation scheme having a transmission resource as the entire bandwidth may be applied. In addition, the interleaved resource allocation scheme may meet the regulation related to the above-mentioned minimum occupied bandwidth.

[0174] Here, the interleaved resource allocation scheme may indicate definition and use of specific resource units (e.g., RBs, subchannels, etc.) as a set, which have uniform frequency intervals on frequency resources. Therefore, resource units allocated at uniform intervals in a single frequency channel may be indicated by a single index.

[0175] For example, a method of allocating each subchannel based on interleaving based on a case where a plurality of RBs constituting the subchannel are allocated at uniform intervals may be applied, but may not be limited thereto.

[0176] Fig.10 A single RBS operation is shown to which the present disclosure may be applied.

[0177] Fig.10 A case where a single RBS is configured in a single sidelink bandwidth part (SL-BWP) may be shown. Here, for sidelink communications operating in an unlicensed band, configuration may be performed based on an interleaving structure by a subchannel index (= interleaving index) or other frequency resource allocation unit index (e.g., a unit indicating multiple RBs). In detail, at least one resource pool may be configured within a single SL BWP based on an interleaved subchannel. Here, interleaving-based resources may be configured based on a CRB, which is a resource block allocated based on point A, but may not be limited thereto. In addition, when the same interleaving is applied in different BWPs, the use of different interleaving indices may complicate PUSCH / PUCCH resource allocation between other users.

[0178] The interleaving-based resource pool in a designated single SL BWP in the frequency domain may be configured and indicated through higher layer signaling and / or DCI / SCI-based physical layer signaling.

[0179] For example, a parameter for the interleaving-based side link resource pool configuration state may be set, and the parameter may be set to the UE through higher layer signaling. Here, if interleaving-based resource pool configuration is required, the parameter may be set to "enable", on the contrary, if interleaving-based resource pool configuration is not required, the parameter may be set to "disable", and here, the side link resource pool may be configured based on the number of consecutive subchannels as described above, but is not limited thereto.

[0180] On the contrary, if interleaving-based resource pool configuration is required, interleaving can be configured based on CRB, which is a resource block set based on point A. Here, in the case of using the same interleaving in different BWPs, using different interleaving indices may complicate PUSCH / PUCCH resource allocation between different users. Considering this, the interleaving index can be set based on CRB.

[0181] In addition, for example, a parameter based on an interleaved subchannel index associated with a resource pool may be set, and the parameter may be provided to the UE through a higher layer. Here, assuming that the total number of subchannel indices in an unlicensed channel (ie, the number of interleaved indices) is M, the subchannel index may be set to 0 to M-1. The interleaved structure may be configured based on the LBT bandwidth considered in the unlicensed band. Here, the number of RBs used to configure a single RBS in the LBT bandwidth may vary according to the SCS. For example, for a 15kHz SCS, the number of RBs used to configure the RBS may be 100 to 110 RBs. In addition, for a 30kHz SCS, the number of RBs used to configure the RBS may be 50 to 55 RBs. For example, considering the number of RBs, an interleaved structure may be set based on 10 RBs at a 15kHz SCS, and an interleaved structure may be set based on 5 RBs at a 30kHz SCS. That is, in the case of a 15kHz SCS, a portion of the same interleaving may exist for every 10 RBs. However, this is only an example, and the number of RBs may change. For example, the interleaving structure may be configured with different values ​​according to the RBS size (LBT bandwidth), the SCS, and the number of RBs constituting a single interleaving.

[0182] Here, refer to Fig.10, a bitmap indicating the M subchannel index associated with the resource pool may be configured. For example, if M=10 interleaving at 15kHz SCS, a 10-bit bitmap may be set. As another example, if M=5 interleaving at 30kHz SCS, a 5-bit bitmap may be set. That is, a bitmap indicating the M subchannel index associated with the resource pool may be set. For example, Fig.10 In (a), it is possible to consider applying the existing side link resource pool configuration scheme to the case where resource pool 1 1010 and resource pool 2 1020 are two resource pools in the SL BWP. On the other hand, considering the resource pool configuration of the side link communication (SL-U) to meet the OCB requirements required in the unlicensed band, a configuration in which the interleaving-based resource allocation scheme is set to be enabled may be provided to each of the resource pools 1010 and 1020. For example, as described above, the number of RBs associated with a single subchannel (interleaving) may be determined differently according to the SCS. Reference Fig.10 (b), each of the resource pools 1010 and 1020 can be configured based on the M subchannel index, where the M subchannel index is associated based on the CRB. Therefore, the UE can determine whether the resource pool for sidelink data transmission and reception in the unlicensed band applies the existing sidelink resource pool configuration or the proposed interleaving-based resource pool configuration according to the "enable / disable" of the interleaving-based resource pool configuration.

[0183] In more detail, Fig.11The present disclosure may be applied to a resource pool configuration method for indicating an interleaved structure of a resource pool in a single RBS. For example, in an unlicensed band SL BWP, a subchannel index may be set to 0 to M-1 based on the M RBs associated with each resource pool. For example, subchannel index 0 1110 may indicate CRB m, CRB m+M, CRB m+2M, ..., subchannel index 1 1120 may indicate CRB m+1, CRB m+1+M, CRB m+1+2M, ..., and subchannel index M-1 1130 may indicate CRB m+M-1, CRB m+2M-1, CRB m+3M-1, .... Here, the subchannel index associated with each resource pool may be indicated by an M-bit bitmap. For example, as an unlicensed band side link resource pool based on interleaving, resource pool 0 1140 may include associated subchannel 0 and subchannel 1. Here, as an interleaving-based unlicensed band side link resource pool, resource pool 0 1140 may be indicated based on an M-bit bitmap. In addition, as an interleaving-based unlicensed band side link resource pool, resource pool 1 1150 may include associated subchannel 2 and subchannel 4. Here, as an interleaving-based unlicensed band side link resource pool, resource pool 1 1150 may be indicated based on an M-bit bitmap. As a higher layer parameter, a parameter for an interleaving-based side link resource pool configuration state may be set to "enable / disable". If the parameter is "enable", the side link resource pool may be configured by an interleaving-based subchannel index, wherein the interleaving-based subchannel index constitutes the side link resource pool based on an M-bit bitmap.

[0184] As another example, the interlace / subchannel used for resource pool configuration may be indicated by a resource indication value (RIV). For example, a value corresponding to a starting interlace (m0) and a number of consecutive interlace indexes (L, L>1) may be indicated based on the RIV, and the RIV may be as shown in the following equation 6.

[0185] [Equation 6]

[0186] elseRIV=M(M-L+1)+(M-1-m0)

[0187] Furthermore, for example, interleaving-based resource pools may be configured in multiple RBSs for broadband operation. Fig.12 The present disclosure is applicable to a method for configuring resource pools in multiple RBSs. Fig.12, multiple RBSs 1210, 1220, 1230, and 1240 may be configured in a single carrier frequency band. Here, a guard band may exist between each RBS 1210, 1220, 1230, and 1240. As described above, the guard band may be configured in the carrier frequency band based on the "intracellguardbandsperSCS" parameter or the requirements for RF and interference. For example, "intracellguardbandsperSCS" may include "guradBandSCS" indicating the SCS of the guard band, "intraCellGuradBand" indicating the guard band within the cell, "startCRB" indicating the start CRB of the guard band, and "nrofCRB" indicating the number of CRBs of the guard band, but is not limited thereto.

[0188] [Table 10]

[0189]

[0190] Here, in the case of indicating that resource pools in multiple RBSs are used for broadband operation, in addition to the interleaved resource pool configuration state and the M-bit bitmap, the resource pool configuration may require additional configuration. In detail, the resource pool configuration may be performed considering at least one of the RBS index list and the number of RBSs associated with the resource pool. That is, the resource pool configured in the UE may also consider at least one of the number of RBSs and the index of each RBS.

[0191] For example, a bandwidth for performing LBT in a serving cell having a broadband in an unlicensed band may be considered. Here, the bandwidth for performing LBT in an unlicensed band may correspond to an RBS, and a plurality of RBSs may exist in a single broadband. Here, in the case where the RBS index is indicated based on a resource pool configuration, the resource pool configuration may include A bitmap of bits used to indicate the Each of the RBSs, and based on this, the index of each RBS can be indicated. Fig.12 As shown in , if four RBSs corresponding to the LBT bandwidth are set, the resource pool configuration may include a 4-bit bitmap as an RBS index list. For example, RBS#0 1210 and RBS#1 1220 may be indicated as RBSs associated with the resource pool based on a 4-bit bitmap, but this is merely an example and is not limited to the above embodiment. Here, the method of indicating the RBS index may not directly indicate the bitmap but indicate the RBS index.

[0192] As another example, the RBS index may be indicated based on the RIV. and the number of consecutive interleaving indices (L RB-set,SL ) to indicate the RBS index. Here, L RB-set,SL Can be a value greater than 1.

[0193] For example, if "IntraCellGuardBandsPerSCS" of Table 10 is set in the configuration (e.g., ServingCellConfigCommon, ServingCellConfig) for the serving cell in the unlicensed carrier, the UE may verify that one or more RBSs are configured in the unlicensed carrier. Fig.12 In the embodiment, four RBSs (i.e., four LBT bandwidths) may be configured in an 80 MHz (217 RB) carrier, but for clarity of description, this is only an example and is not limited to the above embodiment. Here, based on the RRC parameters (e.g., IntraCellGuardBandsPerSCS) shown in Table 10, three guard bands may be configured between each RBS 1210, 1220, 1230, and 1240.

[0194] For example, a case where a single SL BWP is configured to correspond to the entire carrier bandwidth and the same RBS and guard band are configured may be considered. Interleaving-based resource pool configuration may be applied to each of the RBSs 1210, 1220, 1230, and 1240. Here, an interleaving-based resource pool may be configured for each RBS. That is, an interleaving-based resource pool may be configured for each RBS regardless of the RBS indication. For example, in Fig.12 In the example, "①" may be a case where an interleaving-based resource pool is configured for each RBS. That is, RBS#0 1210 and RBS#1 1220 may be configured as an interleaving-based resource pool through a 4-bit bitmap based on four RBSs 1210, 1220, 1230, and 1240. Here, an interleaving resource pool may be configured for each RBS in the same manner. That is, in Fig.12 In each of RBS#0 1210 and RBS#1 1220, the interleaving resource pool may have the same form. As another example, the interleaving resource pool may be configured independently for each RBS. Fig.12 In each RBS of RBS#0 1210 and RBS#1 1220, the interleaving resource pool may be in different forms.

[0195] As another example, interleaving-based resource pool configuration can be applied between RBSs. Fig.12In the example, "②" may be a case where RBS#0 1210 and RBS#1 1220 are configured as RBSs in which an interleaved resource pool is indicated. That is, the RB associated with a single subchannel may be an RB existing in RBS#0 1210 and RBS#1 1220. Based on the above, the UE may receive an indication of the RBS index as a resource pool configuration for the sidelink unlicensed band through higher layer signaling. For example, in Fig.12 In the embodiment, the UE may receive an indication of an RBS index through a resource pool configuration based on a 4-bit bitmap. Here, based on the RBS index information, RBS#0 1210 and RBS#1 1220 may be indicated. Thus, the UE may configure the interleaving-based subchannel configuration method within RBS#0 1210 and RBS#1 1220 and the resources corresponding to the intersection thereof as a sidelink unlicensed band resource pool.

[0196] Fig.13 A method for indicating interleaving-based resource pool configuration on multiple RBSs for broadband operation to which the present disclosure can be applied is shown. Fig.13 , a single BWP (BWP 1 1310) may be configured and activated in a single carrier frequency band. Multiple RBSs (RBS #0 to RBS #3, 1321, 1322, 1323, and 1324) may be configured within the activated BWP 1 1310. Here, which RBS among the RBSs 1321, 1322, 1323, and 1324 configured within the SL BWP 1 1310 is to be configured as a resource pool may be provided to the UE based on a signaling parameter. For example, Fig.13 It may be the case that all RBSs 1321, 1322, 1323, and 1324 configured within a single BWP 1310 are configured as a single resource pool, but this is merely an example and is not limited to the above embodiment. In addition, the associated RBS index-related parameters configured as a single resource pool and the parameters for the interleaving-based subchannels within each RBS may be provided to the UE through higher layer signaling. The RBSs associated with the resource pool and the subchannels within the corresponding RBS may be configured in the UE based on the above parameters.

[0197] Fig.14 A method for indicating interleaving-based resource pool configuration on multiple RBSs for broadband operation to which the present disclosure can be applied is shown. Fig.14 , multiple BWPs (BWP 1 1411 and BWP 2 1412) may be configured in a single carrier frequency band. For example, only one of the multiple BWPs 1411 and 1412 configured in a single carrier frequency band may be activated. For example, Fig.14 It may be the case that BWP 1 1411 is activated, but this is just an example and is not limited to the above embodiment.

[0198] Here, resource pool configuration information about the RBSs (RBS#0 1421 and RBS#1 1422) associated with the activated BWP 1 1411 may be provided to the UE through higher layer signaling. That is, when the RBSs 1421 and 1422 within the BWP 1 1411 are configured in an unlicensed carrier, it may be indicated which RBS between the corresponding RBSs 1421 and 1422 is associated with the resource pool. For example, as described above, the RBS associated with the resource pool may be indicated based on a bitmap, or may be indicated based on an RIV. For example, in Fig.14 In the example, all RBSs 1421 and 1422 associated with BWP 1 1411 may be indicated as a resource pool. Finally, the interleaved resources may be set as a resource pool for the UE via an additional indication configuration in the resource pool configuration, which uses an interleaving-based subchannel index within each RBS.

[0199] Fig.15 The present disclosure is applicable to a method for indicating an interleaving-based resource pool configuration on a plurality of RBSs for broadband operation. Fig.15 , four SL BWs 1511, 1512, 1513, and 1514 may be set in one carrier BW. Here, only any one of the four SL BWPs may be activated. For example, if only SL BWP 1 1511 is activated, a single RBS (RBS#0) 1521 associated with SL BWP1 1511 may be indicated as a resource pool through higher layer signaling. For example, since there is only one RBS 1521 within SLBWP 1 1511, a parameter for indicating an additional RBS may not be required. Here, through resource pool configuration based on interleaved subchannel indexes within RBS#0 1521, cross resources may eventually be configured as a resource pool and provided to the UE accordingly.

[0200] Fig.16 The side link resource pool configuration method for an unlicensed band to which the present disclosure can be applied is shown. Fig.16, the UE may receive the configuration of a side link resource pool within a side link BWP configured in a single carrier bandwidth through higher layer signaling (S1610). Here, the side link resource pool may be a resource pool configured in consideration of an unlicensed band. For example, the UE may receive first resource pool configuration information or second resource pool configuration information (S1620) depending on whether a plurality of RBSs are configured within the carrier bandwidth. Here, when a single RBS is configured and operates within the carrier bandwidth, the UE may receive first resource pool configuration information (S1630). That is, when a single RBS is configured based on a single side link BWP in a single carrier bandwidth, the UE may receive first resource pool configuration information, and based on the first resource pool configuration information, side link communication may be performed (S1640). Here, the first resource pool configuration information may include at least one of the following: parameter information indicating whether an interleaving-based side link resource pool is configured and interleaving-based subchannel index information associated with the resource pool. For example, the information indicating whether an interleaving-based side link resource pool is configured may be set to "enabled" or "disabled" to indicate an interleaving-based side link resource pool configuration state. In addition, for example, the interleaving-based subchannel index associated with the resource pool may include M subchannel indexes based on the SCS. Here, the M subchannel indexes may be indicated based on an M-bit bitmap or RIV, as described above. Here, the resource pool configured in the sidelink unlicensed band may be configured based on the interleaving of the subchannel index (interleaving index) or the unit index, as described above.

[0201] In addition, for example, when multiple RBSs are configured in a single carrier bandwidth, the UE may receive second resource pool configuration information (S1650). Then, the UE may perform side link communication based on the second resource pool configuration information (S1660). That is, when multiple RBSs for broadband operation are configured in the UE, the UE may receive second resource pool configuration information and may perform side link communication. Here, the second resource pool configuration information may be resource pool configuration information configured in consideration of broadband operation. For example, the second resource pool configuration information may include the above-mentioned first resource pool configuration information. That is, the second resource pool configuration information may include at least one of the following: parameter information indicating whether an interleaving-based side link resource pool is configured and interleaving-based subchannel index information associated with the resource pool. For example, the information indicating whether an interleaving-based side link resource pool is configured may be set to "enabled" or "disabled" to indicate an interleaving-based side link resource pool configuration state. In addition, for example, an interleaving-based subchannel index associated with a resource pool may include M subchannel indexes based on SCS. Here, the M subchannel indexes may be indicated based on an M-bit bitmap or RIV, as described above. In addition, the second resource pool configuration information may also include at least one of the following: an RBS index list associated with the resource pool and RBS quantity information. For example, the RBS index list may be indicated based on a bitmap or RIV, which includes bits corresponding to the number of RBSs configured in the carrier bandwidth, which has been described above. Here, for example, an interleaving-based resource pool may be configured for each RBS based on the second resource pool configuration information. For example, when an interleaving-based resource pool is configured for each RBS, a resource pool based on the same interleaving (subchannel index) or RB unit index may be configured for each RBS. As another example, when an interleaving-based resource pool is configured for each RBS, a resource pool based on different interleaving (subchannel index) or RB unit index may be configured for each RBS, which is not limited to a specific embodiment.

[0202] As another example, a resource pool based on interleaving (subchannel index) or RB unit index may be configured between RBSs (i.e., according to one or more RBSs). That is, an interleaving-based resource pool may be configured in multiple RBSs and may be indicated based on a subchannel index. Based on the above, the UE may receive from the base station a configuration regarding an RBS associated with a resource pool and a subchannel within the associated RBS.

[0203] Fig.17 is a diagram showing a base station device and a UE device to which the present disclosure can be applied.

[0204] The base station device 1700 may include a processor 1720 , an antenna unit 1712 , a transceiver 1714 , and a memory 1716 .

[0205] The processor 1720 performs baseband-related signal processing and may include a higher layer processor 1730 and a physical layer processor 1740. The higher layer processor 1730 may process operations of a media access control (MAC) layer, a radio resource control (RRC) layer, or a higher layer thereof. The physical layer processor 1740 may process operations of a physical (PHY) layer (e.g., uplink received signal processing, downlink transmitted signal processing). In addition, in order to perform baseband-related signal processing, the processor 1720 may also control the overall operation of the base station apparatus 1700.

[0206] The antenna unit 1712 may include one or more physical antennas, and may support multiple-input multiple-output (MIMO) transmission and reception when multiple antennas are included. In addition, beamforming may be supported.

[0207] The memory 1716 may store information processed by the processor 1720 , software, an operating system, applications, etc. related to the operation of the base station device 1700 , and may include components such as a buffer.

[0208] The processor 1720 of the base station 1700 may be configured to implement the operations of the base station in the examples described herein.

[0209] The UE device 1750 may include a processor 1770, an antenna unit 1762, a transceiver 1764, and a memory 1766. For example, here, the UE device 1750 may perform communication with the base station device 1700. As another example, here, the UE device 1750 may perform SL communication with another UE device. That is, the UE device 1750 used here refers to a device capable of communicating with at least one of the base station device 1700 and other UE devices, and is not limited to communicating with a specific device.

[0210] The processor 1770 performs baseband-related signal processing and may include a higher layer processor 1780 and a physical layer processor 1790. The higher layer processor 1780 may process the operation of the MAC layer, the RRC layer, or a higher layer. The physical layer processor 1790 may process the operation of the PHY layer (e.g., downlink received signal processing, uplink transmitted signal processing). In addition, in order to perform baseband-related signal processing, the processor 1770 may also control the operation of the UE device 1750 as a whole.

[0211] The antenna unit 1762 may include one or more physical antennas, and may support MIMO transmission and reception when multiple antennas are included. In addition, beamforming may be supported.

[0212] The memory 1766 may store computer-processed information related to the operation of the UE device 1750 of the processor 1770 , software, operating system, applications, etc., and may include components such as a buffer.

[0213] According to the example of the present disclosure, the terminal device 1750 may be associated with a vehicle. For example, the terminal device 1750 may be integrated in a vehicle, may be located in a vehicle, or may be located on a vehicle. In addition, the terminal device 1750 according to the present disclosure may be the vehicle itself. In addition, the terminal device 1750 according to the present disclosure may be at least one of a wearable terminal, an AR / VR, an Internet of Things (IoT) terminal, a robot terminal, and a public safety terminal. The terminal device 1750 to which the present disclosure may be applied may include various types of communication devices that support interactive services using side links, which are used for services such as Internet access, service execution, navigation, real-time information, autonomous driving, and safety and risk diagnosis. In addition, the terminal device 1750 may include an AR / VR device capable of performing side link operations or any type of communication device capable of performing relay operations as a sensor.

[0214] Here, the vehicle to which the present disclosure is applied may include an autonomous vehicle, a semi-autonomous vehicle, and a non-autonomous vehicle. Meanwhile, although the terminal device 1750 according to the example of the present disclosure is described as being associated with a vehicle, at least one of the UEs may not be associated with a vehicle. However, it is provided only as an example and should not be construed as limiting the application of the present invention.

[0215] In addition, the terminal device 1750 according to the example of the present disclosure may include various types of communication devices capable of performing collaboration to support interactive services using the side link. That is, the terminal device 1750 may directly support interactive services using the side link, and may be used as a collaborative device for supporting interactive services using the side link.

[0216] In addition, for example, when the terminal device 1750 according to the example of the present disclosure performs sidelink communication, the terminal device 1750 may receive the configuration of the sidelink resource pool within the sidelink BWP configured in the single carrier bandwidth through higher layer signaling. Here, the sidelink resource pool may be a resource pool configured in consideration of an unlicensed band. For example, the terminal device 1750 may receive the first resource pool configuration information or the second resource pool configuration information according to whether a plurality of RBSs are configured within the carrier bandwidth. Here, when a single RBS is configured and operates within the carrier bandwidth, the terminal device 1750 may receive the first resource pool configuration information. That is, when a single RBS is configured based on a single sidelink BWP in a single carrier bandwidth, the terminal device 1750 may receive the first resource pool configuration information, and based on the information, the sidelink communication may be performed. Here, the first resource pool configuration information may include at least one of the following: parameter information indicating whether to configure an interleaved-based sidelink resource pool and interleaved-based subchannel index information associated with the resource pool. For example, information indicating whether an interleaving-based side link resource pool is configured may be set to "enabled" or "disabled" to indicate an interleaving-based side link resource pool configuration state. In addition, for example, an interleaving-based subchannel index associated with a resource pool may include M subchannel indexes based on an SCS. Here, the M subchannel indexes may be indicated based on an M-bit bitmap or RIV, as described above. Here, a resource pool configured in a side link unlicensed band may be configured based on interleaving of a subchannel index (interleaving index) or a cell index, as described above.

[0217] In addition, for example, when multiple RBSs are configured in a single carrier bandwidth, the terminal device 1750 may receive second resource pool configuration information. Then, the terminal device 1750 may perform side link communication based on the second resource pool configuration information. That is, when multiple RBSs for broadband operation are configured in the UE, the terminal device 1750 may receive second resource pool configuration information and may perform side link communication. Here, the second resource pool configuration information may be resource pool configuration information configured in consideration of broadband operation. For example, the second resource pool configuration information may include the above-mentioned first resource pool configuration information. That is, the second resource pool configuration information may include at least one of the following: parameter information indicating whether to configure an interleaving-based side link resource pool and interleaving-based subchannel index information associated with the resource pool. For example, the information indicating whether to configure an interleaving-based side link resource pool may be set to "enabled" or "disabled" to indicate an interleaving-based side link resource pool configuration state. In addition, for example, an interleaving-based subchannel index associated with a resource pool may include M subchannel indexes based on SCS. Here, the M subchannel indexes may be indicated based on an M-bit bitmap or RIV, as described above. In addition, the second resource pool configuration information may also include at least one of the following: an RBS index list associated with the resource pool and RBS quantity information. For example, the RBS index list may be indicated based on a bitmap or RIV, which includes bits corresponding to the number of RBSs configured in the carrier bandwidth, which has been described above. Here, an interleaving-based resource pool may be configured for each RBS based on the second resource pool configuration information. For example, when an interleaving-based resource pool is configured for each RBS, a resource pool based on the same interleaving (subchannel index) or RB unit index may be configured for each RBS. As another example, when an interleaving-based resource pool is configured for each RBS, a resource pool based on different interleaving (subchannel index) or RB unit index may be configured for each RBS, which is not limited to a specific embodiment.

[0218] As another example, a resource pool based on interleaving (subchannel index) or RB unit index may be configured between RBSs (i.e., according to one or more RBSs). That is, an interleaving-based resource pool may be configured in multiple RBSs and may be indicated based on a subchannel index. Based on the above, the terminal device 1750 may receive from the base station a configuration regarding an RBS associated with a resource pool and a subchannel within the associated RBS.

[0219] In addition, various examples of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. In the case of being implemented by hardware, the examples may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, etc.

[0220] The scope of the present disclosure includes software or machine-executable instructions (e.g., OS, applications, firmware, programs, etc.) that enable the operations of various example methods to be performed on a device or computer, as well as non-transitory computer-readable media that store such software or instructions for execution on a device or computer.

[0221] Various examples of the present disclosure are used to explain representative aspects of the present disclosure rather than listing all possible combinations described in the various examples, and the contents described in the various embodiments may be applied individually or in combination of at least two examples.

[0223] Industrial Applicability

[0224] The above content can be applied to various systems.

Claims

1. A method for configuring a sidelink resource pool for a user equipment (UE) in a wireless communication system, the method comprising: The UE receives resource pool configuration information from the base station based on higher layer signaling; as well as performing sidelink communication with another UE based on the resource pool configuration information, The resource pool configuration information is information about the side link resource pool configuration based on the unlicensed frequency band.

2. The method according to claim 1, wherein: When the UE performs the sidelink communication in a single resource block set (RBS) based on a single sidelink bandwidth part (SL BWP) in a single carrier bandwidth, the UE performs the sidelink communication based on first resource pool configuration information.

3. The method according to claim 2, wherein: The first resource pool configuration information includes at least one of the following: information about an interlace-based sidelink resource pool configuration state and interlace-based subchannel index information associated with the resource pool.

4. The method according to claim 1, wherein: When the UE performs the sidelink communication in a plurality of RBSs based on a single SL BWP in a single carrier bandwidth, the UE performs the sidelink communication based on second resource pool configuration information.

5. The method according to claim 4, wherein: The second resource pool configuration information includes at least one of the following: information about an interlace-based sidelink resource pool configuration state and interlace-based subchannel index information associated with the resource pool. 6 . The method according to claim 5 , wherein the second resource pool configuration information further comprises at least one of the following: RBS index list information and RBS quantity information associated with the resource pool.

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