Terminal and communication method

Abstract

To provide a terminal and a communication method that perform interlaced transmission in direct communication between terminals that conforms to regulations in unlicensed bands.SOLUTION: In a wireless communication system, a terminal 20 includes a control unit 240 that determines an interlaced channel configuration to be applied to transmission in multiple adjacent LBT (Listen Before Talk) channels in an unlicensed band, a receiving unit 220 that executes LBT in the multiple LBT channels, and a transmitting unit 210 that transmits to another terminal 20 based on the channel configuration if the LBT is successful. The control unit 240 determines whether or not to use, for a control channel, an intra-cell guard band (ICGB) between the multiple LBT channels in the channel configuration.SELECTED DRAWING: Figure 27

Description

[Technical Field]

[0001] The present invention relates to a terminal and a communication method in a wireless communication system. [Background technology]

[0002] In LTE (Long Term Evolution) and successor systems to LTE (e.g., LTE-A (LTE Advanced) and NR (New Radio) (also known as 5G)), D2D (Device to Device) technology is being considered, which allows terminals to communicate directly with each other without going through a base station (e.g., Non-Patent Document 1).

[0003] D2D reduces traffic between terminals and base stations and enables communication between terminals even when the base station becomes unavailable due to a disaster or other reason. While 3GPP (registered trademark) refers to D2D as "sidelink," the more general term "D2D" is used in this specification. However, sidelink is also used as needed in the description of the embodiments described below.

[0004] D2D communication is broadly divided into D2D discovery (also referred to as D2D discovery) for discovering other terminals with which communication is possible, and D2D communication (also referred to as D2D direct communication, D2D communication, terminal-to-terminal direct communication, etc.) for direct communication between terminals. Hereinafter, when there is no particular distinction between D2D communication, D2D discovery, etc., they will be simply referred to as D2D. Furthermore, signals transmitted and received in D2D will be referred to as D2D signals. Various use cases for services related to Vehicle to Everything (V2X) in NR are being studied (for example, Non-Patent Document 2).

[0005] In addition, in NR Release 17 (e.g., Non-Patent Document 3), the use of higher frequency bands than in previous releases is being considered. For example, in the frequency band from 52.6 GHz to 71 GHz, applicable numerology including subcarrier spacing and channel bandwidth, physical layer design, and expected interference in actual wireless communications are being considered. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] 3GPP TS 38.211 V17.1.0(2022-03) [Non-patent document 2] 3GPP TR 22.886 V15.1.0(2017-03) [Non-patent document 3] 3GPP TS 38.306 V17.0.0(2022-03) [Non-patent document 4] 3GPP TS 37.213 V17.1.0(2022-03) [Non-Patent Document 5] 3GPP TS 38.331 V17.0.0(2022-03) Summary of the Invention [Problem to be solved by the invention]

[0007] Newly operated frequency bands using higher frequencies than conventional ones are designated as unlicensed bands. Various regulations are defined for unlicensed bands, such as the requirement to perform LBT (Listen Before Talk) when accessing a channel. When performing D2D communication in these high frequency bands, operations that comply with the regulations for unlicensed bands are required. However, it was unclear how to perform interlaced transmission using multiple LBT channels in direct communication between terminals.

[0008] The present invention has been made in view of the above points, and has an object to perform interlaced transmission for direct communication between terminals that complies with regulations in unlicensed bands. [Means for solving the problem]

[0009] According to the disclosed technology, a terminal is provided that includes a control unit that determines an interlaced channel configuration to be applied to transmission in a plurality of adjacent LBT (Listen before talk) channels in an unlicensed band, a receiving unit that performs LBT in the plurality of LBT channels, and a transmitting unit that transmits to other terminals based on the channel configuration if the LBT is successful, and the control unit determines whether or not to use an ICGB (intra-cell guard band) between the plurality of LBT channels for a control channel in the channel configuration. [Effects of the Invention]

[0010] According to the disclosed technology, it is possible to perform interlaced transmission for direct communication between terminals that complies with regulations in unlicensed bands. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram for explaining V2X. [Figure 2] FIG. 1 is a sequence diagram showing an operation example (1) of V2X. [Figure 3] FIG. 10 is a sequence diagram showing an operation example (2) of V2X. [Figure 4] FIG. 10 is a sequence diagram showing an operation example (3) of V2X. [Figure 5] FIG. 10 is a sequence diagram showing an operation example (4) of V2X. [Figure 6] FIG. 10 is a diagram illustrating an example of a sensing operation. [Figure 7] 10 is a flowchart illustrating an example of a preemption operation. [Figure 8] FIG. 10 illustrates an example of a preemption operation. [Figure 9] FIG. 10 is a diagram illustrating an example of a partial sensing operation. [Figure 10] FIG. 10 is a diagram illustrating an example of periodic partial sensing. [Figure 11] FIG. 10 is a diagram for explaining an example of continuous partial sensing. [Figure 12] FIG. 4 is a diagram illustrating an example of a frequency range according to an embodiment of the present invention. [Figure 13] FIG. 1 is a diagram for explaining an example (1) of LBT. [Figure 14] FIG. 10 is a diagram for explaining an example (2) of LBT. [Figure 15] FIG. 10 is a diagram for explaining an example (3) of LBT. [Figure 16] FIG. 1 is a diagram for explaining an example (1) of broadband operation. [Figure 17] FIG. 10 is a diagram for explaining an example (2) of broadband operation. [Figure 18] FIG. 10 is a diagram for explaining an example (3) of broadband operation. [Figure 19] FIG. 10 is a diagram for explaining an example (4) of broadband operation. [Figure 20] FIG. 10 is a diagram illustrating an example (1) of a plurality of RB sets. [Figure 21] FIG. 10 is a diagram illustrating an example (2) of multiple RB sets. [Figure 22] FIG. 2 is a diagram for explaining an example (1) of control channel transmission in the embodiment of the present invention. [Figure 23] FIG. 10 is a diagram illustrating an example (2) of control channel transmission according to an embodiment of the present invention. [Figure 24] FIG. 10 is a diagram illustrating an example (3) of control channel transmission according to an embodiment of the present invention. [Figure 25] FIG. 10 is a diagram illustrating an example (4) of control channel transmission according to an embodiment of the present invention. [Figure 26] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 27]FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 28] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. [Figure 29] FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0013] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, but not limited to, the existing LTE. Furthermore, the term "LTE" used in this specification has a broad meaning including LTE-Advanced, a system subsequent to LTE-Advanced (e.g., NR), or a wireless LAN (Local Area Network), unless otherwise specified.

[0014] Furthermore, in the embodiments of the present invention, the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0015] Furthermore, in the embodiments of the present invention, when radio parameters and the like are "configured," it may mean that predetermined values ​​are pre-configured, or that radio parameters notified from the base station 10 or the terminal 20 are set.

[0016] Figure 1 is a diagram for explaining V2X. 3GPP is studying the realization of V2X (Vehicle to Everything) or eV2X (enhanced V2X) by extending D2D functions, and is currently working on specifications. As shown in Figure 1, V2X is part of ITS (Intelligent Transport Systems) and is a collective term for V2V (Vehicle to Vehicle), which refers to a form of communication between vehicles; V2I (Vehicle to Infrastructure), which refers to a form of communication between vehicles and roadside units (RSUs) installed on the side of the road; V2N (Vehicle to Network), which refers to a form of communication between vehicles and ITS servers; and V2P (Vehicle to Pedestrian), which refers to a form of communication between vehicles and mobile terminals carried by pedestrians.

[0017] Additionally, 3GPP is studying V2X using LTE or NR cellular communications and device-to-device communications. V2X using cellular communications is also called cellular V2X. NR V2X is being studied to achieve high capacity, low latency, high reliability, and quality of service (QoS) control.

[0018] It is expected that future studies of LTE or NR V2X will be conducted beyond the 3GPP specifications, including ensuring interoperability, reducing costs through implementation of higher layers, using or switching between multiple RATs (Radio Access Technologies), complying with regulations in each country, and methods for acquiring, distributing, managing databases, and using data from LTE or NR V2X platforms.

[0019] In the embodiments of the present invention, a communication device is mainly assumed to be mounted on a vehicle, but the embodiments of the present invention are not limited to this. For example, the communication device may be a terminal held by a person, a device mounted on a drone or an aircraft, a base station, an RSU, a relay station (relay node), a terminal with scheduling capability, etc.

[0020] Note that SL (Sidelink) may be distinguished from UL (Uplink) or DL ​​(Downlink) based on any one or a combination of the following 1) to 4). SL may also be called by other names. 1) Time domain resource allocation 2) Frequency domain resource allocation 3) Reference synchronization signal (including SLSS (Sidelink Synchronization Signal)) 4) Reference signal used for path loss measurement for transmission power control

[0021] Furthermore, with regard to SL or UL Orthogonal Frequency Division Multiplexing (OFDM), any of CP-OFDM (Cyclic-Prefix OFDM), DFT-S-OFDM (Discrete Fourier Transform - Spread - OFDM), non-transform precoded OFDM, and transform precoded OFDM may be applied.

[0022] In the LTE SL, Mode 3 and Mode 4 are defined for SL resource allocation to terminal 20. In Mode 3, transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from base station 10 to terminal 20. Also, in Mode 3, SPS (Semi Persistent Scheduling) is possible. In Mode 4, terminal 20 autonomously selects transmission resources from a resource pool.

[0023] The term "slot" in the embodiments of the present invention may be interpreted as a symbol, a minislot, a subframe, a radio frame, or a TTI (Transmission Time Interval). The term "cell" in the embodiments of the present invention may be interpreted as a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), or the like.

[0024] In the embodiment of the present invention, the terminal 20 is not limited to a V2X terminal, and may be any type of terminal that performs D2D communication. For example, the terminal 20 may be a terminal carried by a user, such as a smartphone, or may be an IoT (Internet of Things) device, such as a smart meter.

[0025] In addition, it is expected that NR-SL will support hybrid automatic repeat request (HARQ) for sidelink unicast and groupcast. Furthermore, NR-V2X will define sidelink feedback control information (SFCI) including a HARQ response. Furthermore, it is being considered to transmit SFCI via a physical sidelink feedback channel (PSFCH).

[0026] In the following description, the PSFCH is used for transmitting the HARQ-ACK on the side link, but this is just an example. For example, the HARQ-ACK may be transmitted on the side link using the PSCCH, the PSSCH, or another channel.

[0027] For convenience, information reported by terminal 20 in HARQ will be generally referred to as HARQ-ACK below. This HARQ-ACK may also be referred to as HARQ-ACK information. More specifically, a codebook applied to HARQ-ACK information reported from terminal 20 to base station 10 or the like will be referred to as a HARQ-ACK codebook. The HARQ-ACK codebook defines the bit string of the HARQ-ACK information. Note that in addition to ACK, NACK is also transmitted using "HARQ-ACK".

[0028] Fig. 2 is a sequence diagram showing an operation example (1) of V2X. As shown in Fig. 2, the wireless communication system according to the embodiment of the present invention may include terminal 20A and terminal 20B. Note that, although there are actually many user devices, Fig. 2 shows terminal 20A and terminal 20B as an example.

[0029] Hereinafter, when there is no particular distinction between terminals 20A, 20B, etc., they will be simply referred to as "terminal 20" or "user device." While Fig. 2 shows an example in which terminal 20A and terminal 20B are both within the coverage of a cell, the operation in the embodiment of the present invention can also be applied to a case in which terminal 20B is outside the coverage.

[0030] As described above, in this embodiment, the terminal 20 is, for example, a device mounted on a vehicle such as an automobile, and has a cellular communication function as a UE in LTE or NR, and a sidelink function. The terminal 20 may be a general mobile terminal (such as a smartphone). The terminal 20 may also be an RSU. The RSU may be a UE-type RSU having the function of a UE, or a gNB-type RSU having the function of a base station device.

[0031] The terminal 20 does not need to be a device in a single housing. For example, even if various sensors are distributed and arranged inside a vehicle, the terminal 20 may be a device including the various sensors.

[0032] Furthermore, the processing of sidelink transmission data in terminal 20 is basically the same as the processing of UL transmission in LTE or NR. For example, terminal 20 scrambles and modulates codewords of transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signals) to one or two layers, and performs precoding. Then, terminal 20 maps the precoded complex-valued symbols to resource elements to generate transmission signals (e.g., complex-valued time-domain SC-FDMA signals), and transmits them from each antenna port.

[0033] Note that the base station 10 has a cellular communication function as a base station in LTE or NR, and a function for enabling communication of the terminal 20 in this embodiment (e.g., resource pool setting, resource allocation, etc.). The base station 10 may also be an RSU (gNB type RSU).

[0034] Furthermore, in the wireless communication system according to the embodiment of the present invention, the signal waveform used by terminal 20 for SL or UL may be OFDMA, SC-FDMA, or another signal waveform.

[0035] As a synchronization signal in SL, terminal 20 transmits a Sidelink Synchronization Signal Block (S-SSB). The S-SSB may include a Sidelink Primary Synchronization Signal (S-PSS), a Sidelink Secondary Synchronization Signal (S-SSS), and a Physical Sidelink Broadcast Channel (PSBCH). Note that names such as S-SSB, S-PSS, and S-SSS are merely examples, and names other than S-SSB, S-PSS, and S-SSS may also be used.

[0036] Terminal 20 transmits an S-SSB to another terminal 20 based on a signal received from base station device 10, a GNSS (Global Navigation Satellite System) signal, or a signal received from another terminal 20. Note that if terminal 20 cannot transmit an S-SSB based on any signal from base station device 10, GNSS, or another terminal 20, terminal 20 may transmit an autonomously determined S-SSB to another terminal 20. Resources available for S-SSB may be periodic slots, and may be referred to as S-SSB opportunities.

[0037] In step S101, terminal 20A autonomously selects resources to be used for the PSCCH and PSSCH from a resource selection window having a predetermined period. The resource selection window may be set in terminal 20 by base station 10. Here, the predetermined period of the resource selection window may be defined by implementation conditions of the terminal, such as processing time or maximum allowable packet delay time, or may be defined in advance by specifications, or the predetermined period may be referred to as an interval in the time domain.

[0038] In steps S102 and S103, terminal 20A transmits SCI (Sidelink Control Information) via PSCCH and / or PSSCH using the resources autonomously selected in step S101, and transmits SL data via PSSCH. For example, terminal 20A may transmit PSCCH using the same time resource as at least a part of the time resource of PSSCH, and using frequency resources that may or may not be adjacent to the frequency resources of PSSCH.

[0039] Terminal 20B receives the SCI (PSCCH and / or PSSCH) and SL data (PSSCH) transmitted from terminal 20A. The received SCI may include information on PSFCH resources for terminal 20B to transmit a HARQ-ACK in response to reception of the data. Terminal 20A may transmit information on autonomously selected resources by including it in the SCI. Note that the resources available for the PSFCH may be periodic slots and the last symbols in the slots (excluding the final symbol), and may be called PSFCH opportunities.

[0040] In step S104, the terminal 20B uses the PSFCH resource determined from the received SCI to transmit a HARQ-ACK for the received data to the terminal 20A.

[0041] In step S105, if the HARQ-ACK received in step S104 indicates a request for retransmission, that is, if it is a NACK (negative acknowledgement), the terminal 20A retransmits the PSCCH and PSSCH to the terminal 20B. The terminal 20A may retransmit the PSCCH and PSSCH using autonomously selected resources.

[0042] If HARQ control involving HARQ feedback is not performed, steps S104 and S105 may not be performed.

[0043] 3 is a sequence diagram showing an operation example (2) of V2X. Blind retransmission without HARQ control may be performed to improve the transmission success rate or reach.

[0044] In step S201, the terminal 20A autonomously selects resources to be used for the PSCCH and the PSSCH from a resource selection window having a predetermined period. The resource selection window may be set to the terminal 20 by the base station 10.

[0045] In steps S202 and S203, terminal 20A transmits SCI via PSCCH and / or PSSCH and transmits SL data via PSSCH using the resources autonomously selected in step S201. For example, terminal 20A may transmit PSCCH using frequency resources adjacent to the frequency resources of the PSSCH in the same time resources as at least a part of the time resources of the PSSCH.

[0046] In step S204, the terminal 20A uses the resource autonomously selected in step S201 to retransmit the SCI via the PSCCH and / or PSSCH and the SL data via the PSSCH to the terminal 20B. The retransmission in step S204 may be performed multiple times.

[0047] If blind retransmission is not performed, step S204 does not have to be performed.

[0048] 4 is a sequence diagram showing an operation example (3) of V2X. The base station 10 may perform sidelink scheduling. That is, the base station 10 may determine sidelink resources to be used by the terminal 20 and transmit information indicating the resources to the terminal 20. Furthermore, when HARQ control involving HARQ feedback is applied, the base station 10 may transmit information indicating PSFCH resources to the terminal 20.

[0049] In step S301, base station 10 performs SL scheduling by transmitting DCI (Downlink Control Information) via PDCCH to terminal 20 A. Hereinafter, for convenience, DCI for SL scheduling will be referred to as SL scheduling DCI.

[0050] Also, in step S301, it is assumed that the base station 10 also transmits DCI for DL ​​scheduling (which may also be called DL allocation) to the terminal 20A via the PDCCH. Hereinafter, for convenience, DCI for DL ​​scheduling will be called DL scheduling DCI. The terminal 20A that has received the DL scheduling DCI receives DL data via the PDSCH using resources specified in the DL scheduling DCI.

[0051] In steps S302 and S303, terminal 20A transmits SCI (Sidelink Control Information) via PSCCH and / or PSSCH using resources specified in the SL scheduling DCI, and also transmits SL data via PSSCH. Note that only PSSCH resources may be specified in the SL scheduling DCI. In this case, for example, terminal 20A may transmit PSCCH using frequency resources adjacent to the frequency resources of PSSCH, in the same time resources as at least a part of the time resources of PSSCH.

[0052] The terminal 20B receives the SCI (PSCCH and / or PSSCH) and SL data (PSSCH) transmitted from the terminal 20A. The SCI received via the PSCCH and / or PSSCH includes information on the PSFCH resource used by the terminal 20B to transmit a HARQ-ACK in response to reception of the data.

[0053] The resource information is included in the DL scheduling DCI or SL scheduling DCI transmitted from the base station 10 in step S301, and the terminal 20A acquires the resource information from the DL scheduling DCI or SL scheduling DCI and includes it in the SCI. Alternatively, the resource information may not be included in the DCI transmitted from the base station 10, and the terminal 20A may autonomously include the resource information in the SCI and transmit it.

[0054] In step S304, the terminal 20B uses the PSFCH resource determined from the received SCI to transmit a HARQ-ACK for the received data to the terminal 20A.

[0055] In step S305, the terminal 20A transmits a HARQ-ACK, for example, at a timing (for example, slot-by-slot timing) specified by the DL scheduling DCI (or the SL scheduling DCI) using a PUCCH (Physical uplink control channel) resource specified by the DL scheduling DCI (or the SL scheduling DCI), and the base station 10 receives the HARQ-ACK. The codebook for the HARQ-ACK may include a HARQ-ACK received from the terminal 20B or a HARQ-ACK generated based on a PSFCH that was not received, as well as a HARQ-ACK for DL ​​data. However, if no DL data is allocated, for example, a HARQ-ACK for DL ​​data is not included. In NR Rel. 16, the codebook for the HARQ-ACK does not include a HARQ-ACK for DL ​​data.

[0056] If HARQ control involving HARQ feedback is not performed, step S304 and / or step S305 may not be performed.

[0057] FIG. 5 is a sequence diagram showing an operation example (4) of V2X. As described above, in the NR sidelink, it is supported that an HARQ response is transmitted on the PSFCH. Note that the PSFCH format can be, for example, the same format as PUCCH (Physical Uplink Control Channel) format 0. That is, the PSFCH format may be a sequence-based format in which the PRB (Physical Resource Block) size is 1 and ACKs and NACKs are identified by differences in sequence and / or cyclic shifts. The PSFCH format is not limited to this. The PSFCH resource may be allocated to the last symbol or the last multiple symbols of a slot. Furthermore, a period N is set or predefined for the PSFCH resource. The period N may be set or predefined on a slot-by-slot basis.

[0058] In FIG. 5, the vertical axis corresponds to the frequency domain, and the horizontal axis corresponds to the time domain. The PSCCH may be placed in the first symbol of a slot, or in multiple symbols from the first, or in multiple symbols from a symbol other than the first. The PSFCH may be placed in the last symbol of a slot, or in multiple symbols from the last. Note that the above-mentioned "first symbol of a slot" and "last symbol of a slot" may not take into account symbols for AGC (Automatic Gain Control) and symbols for transmission / reception switching. That is, for example, if one slot is composed of 14 symbols, the "first symbol of a slot" and the "last symbol of a slot" may refer to the first and last symbols, respectively, of the 12 symbols excluding the first and last symbols. In the example shown in FIG. 5, three subchannels are configured in the resource pool, and two PSFCHs are placed three slots after the slot in which the PSSCH is placed. The arrow from the PSSCH to the PSFCH indicates an example of a PSFCH associated with the PSSCH.

[0059] When the HARQ response in NR-V2X groupcast is groupcast option 2, which transmits an ACK or NACK, it is necessary to determine the resources to be used for transmitting and receiving the PSFCH. As shown in FIG. 5, in step S401, terminal 20A, which is a transmitting terminal 20, performs groupcast to terminals 20B, 20C, and 20D, which are receiving terminals 20, via SL-SCH (Sidelink Shared Channel). In the following step S402, terminal 20B uses PSFCH#B, terminal 20C uses PSFCH#C, and terminal 20D uses PSFCH#D to transmit a HARQ response to terminal 20A. Here, as shown in the example of FIG. 5, if the number of available PSFCH resources is smaller than the number of receiving terminals 20 belonging to the group, it is necessary to determine how to allocate the PSFCH resources. Note that the transmitting terminal 20 may know the number of receiving terminals 20 in the groupcast. Note that in groupcast option 1, only a NACK is transmitted as the HARQ response, and an ACK is not transmitted.

[0060] FIG. 6 is a diagram illustrating an example of sensing operation in NR. In resource allocation mode 2, a terminal 20 selects a resource and performs transmission. As shown in FIG. 6, the terminal 20 performs sensing in a sensing window within a resource pool. Through sensing, the terminal 20 receives a resource reservation field or a resource assignment field included in an SCI transmitted from another terminal 20, and identifies available resource candidates within a resource selection window within the resource pool based on the field. Then, the terminal 20 randomly selects a resource from the available resource candidates.

[0061] 6, the resource pool configuration may have a period. For example, the period may be 10240 milliseconds. SL From slot t Tmax-1 SL In this example, the resource pool is set up to the period. The resource pool in each period may have an area set by, for example, a bitmap.

[0062] Also, as shown in FIG. 6, the transmission trigger in terminal 20 occurs in slot n, and the priority of the transmission is p TX The terminal 20 receives data from slot n-T0 to slot nT proc,0 In the sensing window up to the slot immediately before the priority p RX When an SCI is detected within the sensing window and the RSRP (Reference Signal Received Power) is greater than a threshold, the resource in the resource selection window corresponding to the SCI is excluded. When an SCI is detected within the sensing window and the RSRP is less than a threshold, the resource in the resource selection window corresponding to the SCI is not excluded. The threshold is, for example, a value determined by the priority p TX and priority p RX A threshold Th is set or defined for each resource in the sensing window based on pTX,pRX may be.

[0063] Also, the slot t shown in Figure 6 m SL As such, resources in the resource selection window that are candidates for resource reservation information corresponding to resources in the sensing window that were not monitored, for example for transmission, are excluded.

[0064] In the resource selection window from slot n+T1 to slot n+T2, resources occupied by other UEs are identified as shown in Figure 6, and the resources excluding these resources are used as available resource candidates. The set of available resource candidates is denoted as S A Then, S A If the threshold Th is set for each resource in the sensing window, pTX,pRX The threshold Th may be increased by 3 dB and resource identification may be performed again. pTX,pRX By increasing the number of resources that are not excluded because their RSRP is less than the threshold, the set of resource candidates S A may be set to be 20% or more of the resource selection window. A If the threshold Th is set for each resource in the sensing window, pTX,pRX The operation of increasing the signal level by 3 dB and performing resource identification again may be repeated.

[0065] The lower layer of the terminal 20 is S A The upper layer of the terminal 20 may report S A The terminal 20 may determine the resources to be used by performing random selection on the upper layer. The terminal 20 may perform sidelink transmission using the determined resources. For example, the upper layer may be a MAC layer, and the lower layer may be a PHY layer or a physical layer.

[0066] In Figure 6 above, the operation of the transmitting terminal 20 is described, but the receiving terminal 20 may detect data transmission from another terminal 20 based on the results of sensing or partial sensing, and receive data from the other terminal 20.

[0067] FIG. 7 is a flowchart showing an example of preemption in NR. FIG. 8 is a diagram showing an example of preemption in NR. In step S501, terminal 20 performs sensing in a sensing window. If terminal 20 performs a power saving operation, sensing may be performed in a predefined limited period. Next, terminal 20 identifies each resource in the resource selection window based on the sensing result and generates a set of resource candidates S A Then, the terminal 20 determines a set of resource candidates S A A resource set (r_0, r_1, . . . ) for determining preemption is selected from the resource set (r_0, r_1, . . . ) (S503). The resource set may be notified to the PHY layer from an upper layer as the resource for determining whether preemption has occurred.

[0068] In step S504, the terminal 20 re-identifies each resource in the resource selection window based on the sensing result at the timing T(r_0)-T3 shown in FIG. 8 to generate a set of resource candidates S A , and further determines whether to preempt the resource set (r_0, r_1, . . . ) based on the priority. For example, in r_1 shown in FIG. 8, an SCI transmitted from another terminal 20 is detected by re-sensing, and S A When preemption is enabled, if the value prio_RX indicating the priority of the SCI transmitted from another terminal 20 is lower than the value prio_TX indicating the priority of the transport block transmitted from the terminal itself, the terminal 20 determines that the resource r_1 has been preempted. Note that the lower the value indicating the priority, the higher the priority. In other words, if the value prio_RX indicating the priority of the SCI transmitted from another terminal 20 is higher than the value prio_TX indicating the priority of the transport block transmitted from the terminal itself, the terminal 20 determines that the resource r_1 has been preempted. A, pl8), this priority is set as prio_pre. At this time, if the value prio_RX indicating the priority of the SCI transmitted from the other terminal 20 is lower than prio_pre and prio_RX is lower than the value prio_TX indicating the priority of the transport block transmitted from the terminal itself, the terminal 20 determines that the resource r_1 has been preempted.

[0069] In step S505, if preemption is determined in step S504, the terminal 20 notifies the upper layer of preemption, causes the upper layer to reselect resources, and ends the preemption check.

[0070] In addition, when re-evaluation is performed instead of checking preemption, in the above step S504, the set S of resource candidates is A After determining S A If the resource set (r_0, r_1,...) is not included in the resource set, the resource is not used and a resource reselection is performed in the upper layer.

[0071] FIG. 9 is a diagram showing an example of partial sensing operation in LTE. When partial sensing is configured from a higher layer in the LTE sidelink, terminal 20 selects resources and performs transmission as shown in FIG. 9. As shown in FIG. 9, terminal 20 performs partial sensing on a part of the sensing window in a resource pool, i.e., a sensing target. With partial sensing, terminal 20 receives a resource reservation field included in an SCI transmitted from another terminal 20, and identifies available resource candidates in the resource selection window in the resource pool based on the field. Then, terminal 20 randomly selects a resource from the available resource candidates.

[0072] Figure 9 shows the subframe t0SL From subframe t Tmax-1 SL In this example, the resource pool is set up to subframe n+T1. The target area of ​​the resource pool may be set by, for example, a bitmap. As shown in FIG. 9, it is assumed that a transmission trigger occurs in subframe n in terminal 20. As shown in FIG. 9, among subframes n+T1 to n+T2, the target area of ​​the resource pool is set up to subframe n+T3. y1 SL From subframe t yY SL Y subframes up to may be set as the resource selection window.

[0073] The terminal 20 receives a subframe t y1-k×Pstep SL From subframe t yY-k×Pstep SL It is possible to detect, for example, that another terminal 20 is transmitting in one or more sensing targets up to subframe t. k may be determined by, for example, a 10-bit bitmap. FIG. 9 shows an example in which the third and sixth bits of the bitmap are set to "1" indicating that partial sensing is performed. That is, in FIG. 9, y1-6×Pstep SL From subframe t yY-6×Pstep SL Up to and subframe t y1-3×Pstep SL From subframe t yY-3×Pstep SL As mentioned above, the k-th bit of the bitmap is set as the sensing target for subframe t. y1-k×Pstep SL From subframe t yY-k×Pstep SL It may correspond to a sensing window up to y i corresponds to the index (1...Y) in the Y subframe.

[0074] Note that k is set as a 10-bit bitmap or is predefined, and P stepHowever, when SL communication is performed on DL and UL carriers, P step may be (U / (D+S+U))*100ms, where U corresponds to the number of UL subframes, D corresponds to the number of DL subframes, and S corresponds to the number of special subframes.

[0075] When an SCI is detected in the sensing target and the RSRP is greater than a threshold, the resource in the resource selection window corresponding to the resource reservation field of the SCI is excluded. When an SCI is detected in the sensing target and the RSRP is less than a threshold, the resource in the resource selection window corresponding to the resource reservation field of the SCI is not excluded. The threshold may be, for example, a sender priority p TX and receiver priority p RX Based on this, a threshold Th is set or defined for each resource in the sensing target. pTX,pRX may be.

[0076] As shown in Fig. 9, in the resource selection window set in the Y subframe of the section [n+T1, n+T2], the terminal 20 identifies resources occupied by other UEs, and the resources excluding these resources become available resource candidates. Note that the Y subframes do not have to be consecutive. The set of available resource candidates is denoted as S A Then, S A If the resource selection window is less than 20% of the resources, the threshold Th set for each sensing target resource is pTX,pRX may be increased by 3 dB and resource identification performed again.

[0077] That is, the threshold value Th pTX,pRX By increasing S and performing resource identification again, the number of resources that are not excluded because their RSRP is below the threshold may be increased. A Measure the RSSI of each resource in the set S and select the resources with the smallest RSSI. B The set of resource candidates S BS until is greater than or equal to 20% of the resource selection window. A The resource with the smallest RSSI included in B The operation of adding to may be repeated.

[0078] The lower layer of the terminal 20 is S B The upper layer of the terminal 20 may report S B The terminal 20 may determine the resource to be used by randomly selecting the resource. The terminal 20 may perform sidelink transmission using the determined resource. Note that after once reserving the resource, the terminal 20 may select the resource a predetermined number of times (e.g., C resel The resource may be used periodically without sensing for a certain period of time (times).

[0079] In the NR sidelink, power saving based on random resource selection and partial sensing is specified. A terminal 20 to which partial sensing is applied performs reception and sensing only in specific slots within a sensing window. That is, the terminal 20 may perform partial sensing, which identifies resources by sensing only limited resources compared to full sensing, and selects resources from the identified resource set. Alternatively, the terminal 20 may perform random selection, which sets resources within the resource selection window as an identified resource set without excluding resources from the resources within the resource selection window, and selects resources from the identified resource set.

[0080] Note that a method of performing random selection at the time of resource selection and using sensing information at the time of reevaluation or preemption check may be treated as partial sensing or as random selection.

[0081] The sensing operations may be 1) and 2) shown below. Note that sensing and monitoring may be interchangeable, and the sensing operations may include at least one of measuring received RSRP, obtaining reserved resource information, and obtaining priority information.

[0082] 1)Periodic-based partial sensing In a mechanism where sensing is performed only on some slots, an operation of determining sensing slots based on a reservation periodicity. The reservation period is a value related to a resource reservation period field. The period may be replaced with periodicity.

[0083] 2) Contiguous partial sensing In a mechanism for sensing only some slots, an operation of determining sensing slots based on aperiodic reservation, where the aperiodic reservation is a value associated with a time resource assignment field.

[0084] In addition, multiple resource allocation methods can be configured for a resource pool. Also, as a power-saving function, SL-DRX (Discontinuous Reception) is supported. That is, reception is performed only during a predetermined time period.

[0085] As described above, partial sensing is supported as one of the power saving functions. In a resource pool in which partial sensing is configured, the terminal 20 may perform the above-described periodic partial sensing. The terminal 20 may receive, from the base station 10, information for configuring a resource pool in which partial sensing is configured and periodic reservation is enabled.

[0086] 10 is a diagram for explaining an example of periodic partial sensing. As shown in FIG. 10, Y candidate slots for resource selection are selected from a resource selection window [n+T1, n+T2].

[0087] t y SL Let t be one of the Y candidate slots. y-k×Preserve SL may be used as a target slot for periodic partial sensing.

[0088] P reserve may correspond to all values ​​contained in a configured or predefined set sl-ResouceReservePeriodList. Alternatively, P may be limited to a subset of sl-ResouceReservePeriodList. reserve The value of P may be set or predefined. reserve and sl-ResouceReservePeriodList may be configured for each transmission resource pool in resource allocation mode 2. Furthermore, the UE may implement monitoring of periods included in sl-ResouceReservePeriodList other than the limited subset. For example, the terminal 20 may additionally monitor opportunities corresponding to P_RSVP_Tx.

[0089] Regarding the k value, the terminal 20 may monitor the most recent sensing opportunity in a certain reservation cycle before slot n of the resource selection trigger or before the first slot of Y candidate slots subject to processing time limitations. Furthermore, the terminal 20 may additionally monitor periodic sensing opportunities corresponding to a set of one or more k values. For example, the k value may be set to a value corresponding to the most recent sensing opportunity in a certain reservation cycle before slot n of the resource selection trigger or before the first slot of Y candidate slots subject to processing time limitations, and a value corresponding to the sensing opportunity immediately preceding the most recent sensing opportunity in the certain reservation cycle.

[0090] As described above, partial sensing is supported as one of the power saving functions. In a resource pool in which partial sensing is configured, the terminal 20 may perform the above-described continuous partial sensing. The terminal 20 may receive information from the base station 10 for configuring a resource pool in which partial sensing is configured and aperiodic reservation is enabled.

[0091] FIG. 11 is a diagram for explaining an example of continuous partial sensing. As shown in FIG. 11, when the trigger for resource selection is slot n, terminal 20 selects Y candidate slots for resource selection from the resource selection window [n+T1, n+T2]. FIG. 11 shows an example in which Y=7. As shown in FIG. 11, the beginning of Y candidate slots is slot t y1 Then, the next slot is t y2 Let,···,the end of Y candidate slots be slot t yY It is written as follows.

[0092] The terminal 20 is connected to the section [n+T A ,n+T B ] and n+T B or n+T B After (n+T C The resource selection is performed in the interval [n+T A ,n+T B ]T A and T B can be any value, and n can be replaced with the index of any of the Y candidate slots.

[0093] Furthermore, the symbol [ may be replaced with the symbol (and the symbol ] may be replaced with the symbol). For example, the interval [a, b] is the interval from slot a to slot b, and includes slot a and slot b. For example, the interval (a, b) is the interval from slot a to slot b, and does not include slot a and slot b.

[0094] The candidate resources to be selected are referred to as Y candidate slots, but all slots in the interval [n+T1, n+T2] may be candidate slots, or only some of the slots may be candidate slots.

[0095] Furthermore, inter-terminal coordination has been specified as a method for improving reliability and delay performance. For example, the inter-terminal coordination method 1 and inter-terminal coordination method 2 shown below have been specified. Hereinafter, the terminal 20 that transmits coordination information will be referred to as UE-A, and the terminal 20 that receives the coordination information will be referred to as UE-B.

[0096] Inter-UE coordination method 1) For UE-B's transmission, a preferred resource set and / or a non-preferred resource set is transmitted from UE-A to UE-B. Hereinafter, inter-UE coordination method 1 is also referred to as IUC scheme 1 (Inter-UE coordination scheme 1).

[0097] Inter-UE coordination method 2) UE-A transmits to UE-B information indicating resources indicated by the SCI received from UE-B where collision with other transmission or reception is expected and / or where collision has been detected. This information may be transmitted via the PSFCH. Hereinafter, inter-UE coordination method 2 is also referred to as IUC scheme 2 (Inter-UE coordination scheme 2).

[0098] 3GPP Release 16 or Release 17 sidelink is specified for 1) and 2) below.

[0099] 1) An environment where only 3GPP terminals exist in the ITS (Intelligent Transport Systems) band 2) An environment in which UL resources can be used for SL in the licensed bands of FR1 (Frequency range 1) and FR2 defined in NR.

[0100] It is being considered to include unlicensed bands as sidelinks in 3GPP Release 18 and beyond, such as the 5 GHz-7 GHz band and the 60 GHz band.

[0101] Fig. 12 is a diagram showing an example of frequency bands used in a wireless communication system. In the NR specifications of 3GPP Release 15 and Release 16, operation of a frequency band of 52.6 GHz or higher is being considered. As shown in Fig. 12, FR (Frequency range) 1, which is currently specified for operation, is a frequency band from 410 MHz to 7.125 GHz, with an SCS (Subcarrier spacing) of 15, 30, or 60 kHz and a bandwidth from 5 MHz to 100 MHz.

[0102] FR2-1 is the frequency band from 24.25 GHz to 52.6 GHz, and the SCS uses 60, 120, or 240 kHz, with a bandwidth of 50 MHz to 400 MHz. As shown in Figure 12, FR2-2 may be assumed to be from 52.6 GHz to 71 GHz. It may also be assumed to support frequency bands above 71 GHz.

[0103] When using a band above 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform - Spread (DFT-S-OFDM) with a larger Sub-Carrier Spacing (SCS) may be applied.

[0104] Additionally, in high frequency bands such as FR2-2, increased phase noise between carriers becomes an issue, which may necessitate the application of larger (wider) SCS or single carrier waveforms.

[0105] For example, examples of unlicensed bands in the 5 GHz-7 GHz band include 5.15 GHz to 5.35 GHz, 5.47 GHz to 5.725 GHz, and 5.925 GHz and above.

[0106] For example, examples of unlicensed bands in the 60 GHz band include 59 GHz to 66 GHz, 57 GHz to 64 GHz or 66 GHz, and 59.4 GHz to 62.9 GHz.

[0107] In unlicensed bands, various regulations are established to prevent interference with other systems or other devices.

[0108] For example, in the 5 GHz-7 GHz band, LBT (Listen before talk) is performed when accessing a channel. The base station 10 or terminal 20 performs power detection for a predetermined period immediately before transmitting, and if the power exceeds a certain value, i.e., if transmission from another device is detected, the transmission is aborted (this may be called an LBT failure). In addition, a maximum channel occupancy time (MCOT) is specified. MCOT is the maximum time period during which transmission is allowed to continue if transmission is started after LBT, and is, for example, 4 ms in Japan.

[0109] In addition, the occupied channel bandwidth (OCB) requirement states that when a transmission uses a certain carrier bandwidth, it must use at least X% of that bandwidth. For example, in Europe, it is required to use 80% to 100% of the nominal channel bandwidth (NCB). The OCB requirement aims to ensure that power detection for channel access is performed correctly.

[0110] Regarding maximum transmission power and maximum power spectral density, in order to avoid excessive interference, transmission must be performed at or below a certain transmission power. For example, in Europe, the maximum transmission power is 23 dBm in the 5150 MHz-5350 MHz band. Also, in Europe, the maximum power spectral density is 10 dBm / MHz in the 5150 MHz-5350 MHz band.

[0111] For example, in the 60 GHz band, LBT is performed when accessing a channel. The base station 10 or terminal 20 performs power detection for a predetermined period immediately before transmitting, and if the power exceeds a certain value, i.e., if transmission by another device is detected, the transmission is stopped. It also specifies that transmissions are performed at or below a predetermined transmission power with respect to maximum transmission power and maximum power spectral density. It also specifies that the terminal must have the ability to satisfy OCB requirements.

[0112] In NR, the following four types of channel access procedures are defined based on the differences in the time domain behavior of LBT (sensing period). Note that this sensing is a different operation from the above-mentioned sidelink sensing, and is therefore referred to as LBT sensing for the sake of distinction.

[0113] Type 1) Variable-time LBT sensing performed before transmission. Also known as Category 4 LBT. Type 2A) Performs 25 μs of LBT sensing before transmission. Also known as Category 2 LBT. Type 2B) Performs 16 μs of LBT sensing before transmission. Also known as Category 2 LBT. Type 2C) Start transmitting without LBT. Same as licensed band transmission.

[0114] FIG. 13 is a diagram for explaining an example of LBT (1). FIG. 13 shows an example of a channel access procedure of Type 1. Type 1 is further classified into four classes indicating channel access priority classes (CAPC) based on differences in LBT sensing length. LBT sensing is performed in the following two periods:

[0115] The first period is the prioritization period or defer duration, which is 16 + 9 × m p The length is [μs]. p A fixed value is specified for each channel access priority class.

[0116] The second period is a backoff procedure, and has a length of 9 × N [μs]. The value of N is randomly determined from a certain range (see the CWS adjustment procedure in Non-Patent Document 4). N is the initial value of the backoff counter, and the value of the backoff counter is decreased by 1 each time the power of a signal from another device is not detected within 9 [μs].

[0117] In the above, the 9 μs LBT sensing period may be referred to as an LBT sensing slot period.

[0118] In the example of Figure 13, m p = 3, and the hold period is 43 μs. As shown in Figure 13, the backoff counter is fixed while the channel is busy. Also, as shown in Figure 13, if a collision occurs between transmissions from the NR-U gNB and WLAN node #2 and an error is detected, the contention window size (CWS) is expanded from 3 to 13 in the NR-U gNB.

[0119] Fig. 14 is a diagram for explaining an example (2) of LBT. Fig. 14 shows an example of a channel access procedure of Type 2A or Type 2B without random backoff. A gap for performing power detection is set before transmission for a period of 25 μs or more for Type 2A, and for 16 μs for Type 2B.

[0120] Figure 15 is a diagram for explaining an example of LBT (3). Figure 15 is an example of a Type 2C channel access procedure. As shown in Figure 15, power detection is not performed before transmission, and transmission is performed immediately after a gap not exceeding 16 μs. The transmission period may be up to 584 μs.

[0121] As mentioned above, multiple LBT types are supported in NR-U. In Type 1, the initial value N of the backoff counter ranges from 0 to CW, whose value range is determined based on the channel access priority class p. p Table 1 shows the m defined for each channel access priority class p in the UL. p , C.W. p The minimum value of CW p,min , C.W. p Maximum value of CW p,max Here is an example:

[0122] [Table 1]

[0123] As shown in Table 1, the channel access priority class p determines the p , C.W. p,min , C.W. p,max is determined. When p is 1, the LBT period calculated from Table 1 is a minimum of 34 μs and a maximum of 88 μs. When p is 2, the LBT period calculated from Table 1 is a minimum of 34 μs and a maximum of 160 μs. When p is 3, the LBT period calculated from Table 1 is a minimum of 43 μs and a maximum of 9286 μs. When p is 4, the LBT period calculated from Table 1 is a minimum of 79 μs and a maximum of 9286 μs. Table 1 is the table used for UL.

[0124] The LBT type and the channel access priority class may be determined based on the notification from the base station 10, the channel type, etc. The 25 μs or 16 μs gap may be set by the base station 10 scheduling, taking into account the TA (Timing Advance) and CP extension.

[0125] The LBT applied to channel access is performed for each predetermined bandwidth (e.g., 20 MHz). If no power is detected in the LBT channel containing each transmission, the transmission can be performed. On the other hand, each CC in Uu can be defined with a bandwidth wider than the LBT channel. In other words, wideband operation is supported. Uu is the radio interface between the Universal Terrestrial Radio Access Network (UTRAN) and the User Equipment (UE).

[0126] Fig. 16 is a diagram for explaining an example (1) of wideband operation. Fig. 17 is a diagram for explaining an example (2) of wideband operation. In the case of wideband operation in an unlicensed band, as shown in Fig. 16 or 17, when the LBT in a gNB is successful in some or all of the LBT channels, transmission may be permitted in the LBT channel in which the LBT was successful. As shown in Fig. 16, the gNB may transmit a single continuous block, or as shown in Fig. 17, the gNB may transmit multiple discontinuous blocks.

[0127] For DL ​​in unlicensed bands, DL Type A is specified, which performs LBT on each channel, and DL Type B is specified, which performs LBT Type 1 on randomly selected channels and LBT Type 2A on the remaining channels.

[0128] DL Type A is further classified into Type A1 and Type A2. In Type A1, the contention window CWp is determined for each channel. In Type A2, the largest CWp among the CWp determined for each channel is used.

[0129] DL Type B is further classified into Type B1 and Type B2. In Type B1, a single CWp is applied to all channels. In Type B2, the largest CWp among the CWp determined for each channel is used.

[0130] If some or all of the LBT channels in a gNB are successful in LBT, PDSCH transmission in the LBT channels where LBT is successful is permitted. The gNB may transmit a single block that is contiguous in the frequency direction, or the gNB may transmit multiple blocks that are discontinuous in the frequency direction.

[0131] Fig. 18 is a diagram for explaining an example (3) of wideband operation. Fig. 19 is a diagram for explaining an example (4) of wideband operation. As shown in Fig. 18 or 19, when the LBT in the UE is successful in all of the LBT channels in the scheduled band, transmission may be permitted. As shown in Fig. 19, when the LBT fails in some of the LBT channels, transmission may not be permitted.

[0132] 20 is a diagram illustrating an example (1) of multiple RB sets. As shown in FIG. 20, an intra-cell guard band is defined between two adjacent RB sets (which may also be referred to as LBT channels or LBT bands). The intra-cell guard band may also be referred to as an intra-carrier guard band, and may also be written as ICGB.

[0133] If LBT is successful on both LBT channels, ICGB can also be used for transmission. In the example of Figure 20, 50 + 6 + 50 = 106 PRBs can be used.

[0134] If LBT is successful on one of the LBT channels and LBT is not performed on the other LBT channel or the LBT fails, ICGB cannot be used. In other words, 50 PRB of the channel where LBT was successful can be used.

[0135] When transmitting interlaced PSCCH / PSSCH in the configuration shown in FIG. 20, a problem may arise in the PSCCH configuration.

[0136] 21 is a diagram illustrating an example (2) of multiple RB sets. When one subchannel is configured to be closed to one interlace of a certain LBT channel, that is, when one subchannel is not associated with interlaces related to multiple LBT channels, the number of PRBs that can be used for the PSCCH is limited. For example, when a certain resource pool is defined for only one RB set, only 10 PRBs can be used.

[0137] As shown in Figure 21, if an 11IRB (Interlaced Resource Block) is defined to include an ICGB in a PRB, PSCCH transmission and reception becomes complicated when ICGB is not available. On the other hand, if the PSCCH is defined without an ICGB, UE operation related to the use of non-PSCCH PRBs in symbols that include the PSCCH becomes complicated.

[0138] Therefore, when an interlaced configuration is applied, the UE may assume that the PSCCH may have a configuration different from that for conventional sidelink UEs, and that PRBs may be replaced with IRBs and vice versa.

[0139] Operation 1) Fig. 22 is a diagram for explaining an example (1) of control channel transmission in an embodiment of the present invention. As shown in Fig. 22, four or more symbols may be applied to the PSCCH.

[0140] Operation 1a) The number of symbols of the PSCCH may be any of 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13.

[0141] Operation 1b) The number of PRBs applied to the PSCCH may be less than 10. For example, the number of PRBs may be any number from 1 to 9. The number of PRBs less than 10 may be applied only when the number of PSCCH symbols is 4 or more, or may be applied when the number of PSCCH symbols is 2 or 3.

[0142] Action 1c) The arrangement of PSCCH-DMRS in each symbol may be the same as in the case of 2 or 3 symbols, or may be different.

[0143] Operation 1d) The predetermined operations corresponding to transmission / reception / decoding of the PSCCH / PSSCH may be changed. For example, the following operation 1) or 2) may be performed.

[0144] 1) A value greater than 2 or 3 may be assumed as the time offset value from the PSCCH / PSSCH to the corresponding PSFCH. For example, a new parameter different from sl-MinTimeGapPSFCH (see Non-Patent Document 5) may be defined, and a value greater than or equal to 4 may be set or pre-configured. For example, the candidate values ​​may be {3, 4}. When resource selection between PSSCH resources and PSFCH resources is performed in the MAC layer, resource selection may be performed based on the new parameter. Also, for example, sl-MinTimeGapPSFCH may be set or pre-configured to a value greater than or equal to 4. For example, the candidate values ​​may be {2, 3, 4}.

[0145] 2) In resource allocation mode 2, the time gap from the resource selection timing or resource selection trigger timing to the end of the sensing window may be larger than in the past. That is, the end of the sensing window may be set earlier than in the past. The value of the parameter Tproc,0SL corresponding to the time gap may be the previous value plus one slot. That is, the value of Tproc,0SL may be 2 for SCS 15 kHz, 2 for SCS 30 kHz, 3 for SCS 60 kHz, and 5 for SCS 120 kHz. The time gap may be the value of Tproc,0SL plus one. This may be similarly applied to the operations related to the above parameters in partial sensing, re-evaluation, or preemption check.

[0146] Operation 1e) The symbols to which the PSSCH-DMRS is mapped may be the same as when the PSCCH is two or three symbols, or may be different.

[0147] The above-mentioned operation 1) can improve the performance of the PSCCH in SL-U. A common understanding can be reached on the operations that need to be changed in accordance with the increase in the number of PSCCH symbols.

[0148] Operation 2) If the PSCCH can be mapped to the ICGB, a common operation for the PSCCH may be performed whether or not the ICGB is used for PSCCH / PSSCH transmission.

[0149] Operation 2a) When ICGB is used, the PSCCH may be mapped including the PRB of ICGB. When ICGB is not used, the PSCCH mapping when ICGB is used is applied, and the PSCCH mapped to ICGB does not need to be transmitted.

[0150] Operation 2b) Fig. 23 is a diagram for explaining an example (2) of control channel transmission in an embodiment of the present invention. As shown in Fig. 23, when ICGB is not used, PSCCH may be mapped to PRBs other than the PRBs of ICGB.

[0151] 24 is a diagram illustrating an example (3) of control channel transmission in an embodiment of the present invention. As shown in FIG. 24, when ICGB is used, PSCCH mapping for when ICGB is not used may be applied, and information mapped to any PRB other than the PRB in ICGB may be copied to ICGB. The PSSCH may perform the same mapping operation for the PRB of ICGB and the PRB other than ICGB.

[0152] Action 2c) Whether action 2a) or action 2b) is to be applied may be determined by a setting or a preset.

[0153] The above-mentioned operation 2) allows the UE to operate in a common manner whether or not ICGB is used, which means that the UE operation can be simplified.

[0154] Operation 3) When the PSCCH cannot be mapped to the ICGB, a predetermined operation related to the second stage SCI may be performed for the PSCCH mapped to the ICGB. Note that operation 3) may also be applied when the PSCCH can be mapped to the ICGB but is not mapped.

[0155] Operation 3a) Figure 25 is a diagram for explaining an example (4) of control channel transmission in an embodiment of the present invention. As shown in Figure 25, the second stage SCI may not be mapped to the PRBs of ICGB, but may be mapped to PRBs other than the PRBs of ICGB. For example, for PRBs other than the PRBs of ICGB, the second stage SCI may be mapped in the order of frequency first and time second. For example, limited to any LBT channel (for example, the same LBT channel as the PSCCH), the second stage SCI may be mapped in the order of frequency first and time second.

[0156] Operation 3b) The second stage SCI may be mapped to the PRB of the ICGB.

[0157] The above-mentioned operation 3) allows the UE to operate in the same manner whether ICGB is used or not, which means that the UE operation can be simplified.

[0158] In the above-described embodiment, the conventional SL channel and SL signal configuration is used, but the present invention is not limited to this. For example, the present embodiment may be applied to a case where an interlaced channel is used as a configuration to satisfy the OCB requirement.

[0159] The above-described embodiment may be applied only when a predetermined condition is satisfied. For example, the embodiment may be applied in relation to a predetermined SL channel or SL signal. For example, the embodiment may be applied to any of the PSCCH / PSSCH, PSFCH, S-SSB, and SL positioning RS. For example, the embodiment may be applied based on a predetermined setting or pre-configuration. For example, the embodiment may be applied when "enabling" the embodiment in a resource pool is provided by a setting or pre-configuration. For example, the embodiment may not be applied when the LBT method for the second SL transmission is not or is no longer Type 1.

[0160] In order to apply LBT type 2A, 2B, or 2C, an additional transmission (additional TX), such as a CP extension, may be performed immediately before transmission P.

[0161] The applicability and operation of this embodiment may be defined, and the UE capabilities related to this may or may not be reported to the base station 10 and / or the terminal 20.

[0162] The SL transmission of the UE may be any of PSCCH, PSSCH, PSFCH, S-SSB, and SL-PRS, and different channels or signals may be applied to each operation of this embodiment.

[0163] Note that at least one of the SL transmissions of the UE may be an UL transmission.

[0164] This embodiment may be applied to any of resource selection, resource reselection, reevaluation, and preemption check.

[0165] The method according to the embodiment of the present invention is not limited to the case of direct communication between terminals described above, but may be applied to other similar cases.

[0166] The above-described embodiment is not limited to V2X terminals, and may be applied to terminals that perform D2D communication.

[0167] According to the above-described embodiment, in direct communication between terminals using multiple LBT channels in an unlicensed band, interlaced transmission of channels including ICGB can be performed.

[0168] In other words, it is possible to perform interlaced transmission for direct communication between terminals that complies with regulations in unlicensed bands.

[0169] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions of the embodiments.

[0170] <Base station 10> Fig. 26 is a diagram showing an example of the functional configuration of base station 10. As shown in Fig. 26, base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 26 is merely an example. The functional divisions and names of the functional units may be any names as long as they can perform the operations related to the embodiments of the present invention.

[0171] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. The transmitter 110 also has a function of transmitting an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, a DL reference signal, etc. to the terminal 20.

[0172] The setting unit 130 stores in a storage device setting information that is set in advance and various setting information to be transmitted to the terminal 20, and reads out from the storage device as needed. The content of the setting information is, for example, information related to the setting of D2D communication.

[0173] As described in the embodiments, the control unit 140 performs processing related to settings for the terminal 20 to perform D2D communication. Furthermore, the control unit 140 transmits scheduling for D2D communication and DL communication to the terminal 20 via the transmission unit 110. Furthermore, the control unit 140 receives information related to HARQ responses for D2D communication and DL communication from the terminal 20 via the reception unit 120. A functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.

[0174] <Terminal 20> Fig. 27 is a diagram showing an example of the functional configuration of terminal 20. As shown in Fig. 27, terminal 20 has transmitting unit 210, receiving unit 220, setting unit 230, and control unit 240. The functional configuration shown in Fig. 27 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations related to the embodiment of the present invention.

[0175] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 receives various signals wirelessly and acquires a higher layer signal from the received physical layer signal. The receiver 220 also has a function of receiving an NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signal, reference signal, or the like transmitted from the base station 10. For example, the transmitter 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiver 220 receives the PSCCH, PSSCH, PSDCH, or PSBCH, or the like, from the other terminal 20.

[0176] The setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in a storage device and reads it from the storage device as needed. The setting unit 230 also stores setting information that is set in advance. The content of the setting information is, for example, information related to the setting of D2D communication.

[0177] As described in the embodiments, the control unit 240 controls D2D communication for establishing an RRC connection with another terminal 20. The control unit 240 also performs processing related to power saving operation. The control unit 240 also performs processing related to HARQ for D2D communication and DL communication. The control unit 240 also transmits information related to HARQ responses for D2D communication and DL communication to another terminal 20 scheduled by the base station 10 to the base station 10. The control unit 240 may also schedule D2D communication for another terminal 20. The control unit 240 may also autonomously select resources to be used for D2D communication from a resource selection window based on the result of sidelink sensing, or may perform re-evaluation or preemption. The control unit 240 also performs processing related to power saving in transmission and reception of D2D communication. The control unit 240 also performs processing related to inter-terminal coordination in D2D communication. The control unit 240 also performs processing related to LBT in D2D communication. The functional units in the control unit 240 related to signal transmission may be included in the transmitting unit 210 , and the functional units in the control unit 240 related to signal reception may be included in the receiving unit 220 .

[0178] (Hardware configuration) The block diagrams (FIGS. 26 and 27) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0179] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0180] For example, the base station 10, the terminal 20, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 28 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0181] In the following description, the term "apparatus" can be read as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0182] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0183] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0184] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 140 of the base station 10 shown in FIG. 26 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 shown in FIG. 27 may be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0185] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0186] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0187] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0188] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0189] Furthermore, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0190] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0191] Fig. 29 shows an example configuration of a vehicle 2001. As shown in Fig. 29, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0192] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0193] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0194] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0195] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013 or the like to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0196] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0197] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0198] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0199] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0200] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0201] (Summary of the embodiment) As described above, according to an embodiment of the present invention, there is provided a terminal that includes a control unit that determines an interlaced channel configuration to be applied to transmission in a plurality of adjacent LBT (Listen Before Talk) channels in an unlicensed band, a receiving unit that performs LBT in the plurality of LBT channels, and a transmitting unit that transmits to other terminals based on the channel configuration if the LBT is successful, wherein the control unit determines whether or not to use an ICGB (intra-cell guard band) between the plurality of LBT channels for a control channel in the channel configuration.

[0202] With the above configuration, it is possible to perform interlaced transmission of channels including ICGB in direct communication between terminals using multiple LBT channels in an unlicensed band. In other words, it is possible to perform interlaced transmission in direct communication between terminals that complies with regulations in an unlicensed band.

[0203] When the control unit does not use the ICGB for the control channel, the control unit may map the control channel to a PRB (Physical Resource Block) of the plurality of LBT channels other than a PRB included in the ICGB. With this configuration, interlaced transmission of a channel including the ICGB can be performed in direct communication between terminals using a plurality of LBT channels in an unlicensed band.

[0204] When the ICGB is not used for the control channel, the control unit applies control channel mapping for when the ICGB is used for the control channel, and the transmission unit does not need to transmit the control channel mapped to the ICGB. With this configuration, interlaced transmission of a channel including the ICGB can be performed in direct communication between terminals using multiple LBT channels in an unlicensed band.

[0205] When the ICGB is used for the control channel, the control unit may copy information mapped to PRBs other than the PRBs in the ICGB to the PRBs in the ICGB. This configuration enables interlaced transmission of channels including the ICGB in direct communication between terminals using multiple LBT channels in an unlicensed band.

[0206] When the ICGB is not used as a control channel, the control unit does not need to map control information to a shared channel mapped to a PRB in the ICGB. This configuration enables interlaced transmission of a channel including the ICGB in direct communication between terminals using multiple LBT channels in an unlicensed band.

[0207] Furthermore, according to an embodiment of the present invention, there is provided a communication method in which a terminal executes the following procedures: determining an interlaced channel configuration to be applied to transmission in a plurality of adjacent LBT (Listen before talk) channels in an unlicensed band; executing LBT in the plurality of LBT channels; if the LBT is successful, transmitting to another terminal based on the channel configuration; and determining whether or not to use an ICGB (intra-cell guard band) between the plurality of LBT channels for a control channel in the channel configuration.

[0208] With the above configuration, it is possible to perform interlaced transmission of channels including ICGB in direct communication between terminals using multiple LBT channels in an unlicensed band. In other words, it is possible to perform interlaced transmission in direct communication between terminals that complies with regulations in an unlicensed band.

[0209] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0210] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0211] Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0212] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order and are not limited to the particular order presented.

[0213] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0214] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0215] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0216] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0217] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0218] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0219] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0220] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0221] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0222] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or other corresponding information. For example, a radio resource may be indicated by an index.

[0223] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0224] In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0225] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0226] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0227] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0228] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0229] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0230] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0231] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station may be configured to have the functions of the user terminal described above.

[0232] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0233] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0234] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0235] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0236] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0237] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0238] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0239] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0240] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0241] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0242] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0243] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0244] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0245] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0246] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0247] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0248] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0249] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0250] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0251] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0252] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0253] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0254] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within the BWP.

[0255] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be set for the terminal 20 within one carrier.

[0256] At least one of the configured BWPs may be active, and the terminal 20 may not expect to transmit or receive a predetermined signal / channel outside the active BWP. Note that the terms "cell," "carrier," and the like in this disclosure may be read as "BWP."

[0257] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0258] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0259] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0260] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0261] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0262] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a control unit for determining an interlaced channel configuration to be applied to transmissions in a plurality of adjacent LBT (Listen Before Talk) channels in an unlicensed band; A receiving unit that performs LBT on the plurality of LBT channels; a transmitting unit that transmits to another terminal based on the channel configuration when the LBT is successful, A terminal in which the control unit determines whether or not to use an ICGB (intra-cell guard band) between the multiple LBT channels as a control channel in the channel configuration.

2. The terminal according to claim 1 , wherein the control unit maps the control channel to PRBs (Physical Resource Blocks) of the plurality of LBT channels other than the PRBs included in the ICGB when the ICGB is not used as the control channel.

3. When ICGB is not used as a control channel, the control unit applies control channel mapping when ICGB is used as a control channel; The terminal according to claim 1 , wherein the transmitter does not transmit a control channel mapped to ICGB.

4. The terminal according to claim 1 , wherein the control unit copies information mapped to PRBs other than the PRBs in the ICGB to the PRBs in the ICGB when the ICGB is used for a control channel.

5. The terminal according to claim 1 , wherein the control unit does not map control information to a shared channel mapped to a PRB in the ICGB when the ICGB is not used as a control channel.

6. determining an interlaced channel configuration to be applied to transmissions on a plurality of adjacent LBT (Listen Before Talk) channels in an unlicensed band; performing LBT on the plurality of LBT channels; If the LBT is successful, transmitting to another terminal based on the channel configuration; A communication method in which a terminal executes a procedure of determining whether or not to use an ICGB (intra-cell guard band) between the multiple LBT channels as a control channel in the channel configuration.

Images