Terminal and communication method

Abstract

The terminal includes: a receiving unit, which receives a specific information element from a base station with the help of system information or dedicated signaling; and a control unit, which, upon receiving the specific information element, applies a technology for an unlicensed frequency band to an object range of the specific information element, and the control unit executes at least LBT (Listen Before Talk) among the technologies for the unlicensed frequency band.

Description

Technical Field

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

[0002] In NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), technologies that meet the requirements of large-capacity systems, high data transmission speeds, low latency, simultaneous connection of multiple terminals, low costs, and low power consumption are being studied.

[0003] Furthermore, in order to expand the frequency band, existing LTE systems support the use of frequency bands (also known as unlicensed bands, unlicensed carriers, and unlicensed CCs) that are different from the frequency bands licensed by telecommunications operators (licensed bands). Examples of unlicensed bands include the 2.4 GHz band, 5 GHz band, and 6 GHz band, which are used by Wi-Fi (registered trademark) and Bluetooth (registered trademark).

[0004] Specifically, Rel-13 supports carrier aggregation (CA), which combines carriers (CCs) in the licensed band with carriers (CCs) in the unlicensed band. Communication using the unlicensed band and the licensed band together is called License-Assisted Access (LAA).

[0005] In a wireless communication system that uses an unlicensed band together with a licensed band for communication, the base station device (downlink) and the user terminal (uplink) perform channel monitoring (carrier sensing) before sending data in the unlicensed band to confirm whether other devices (e.g., base station devices, user terminals, Wi-Fi devices, etc.) are transmitting. If the monitoring result confirms that there is no transmission from other devices, the transmission opportunity is obtained and the transmission is performed. This action is called LBT (Listen Before Talk). In addition, in NR, the system that supports the unlicensed band is called the NR-U system.

[0006] Prior art literature

[0007] Non-patent literature

[0008] Non-Patent Document 1: 3GPP TS 38.331 V 15.6.0 (2019-06)

[0009] Non-Patent Document 2: 3GPP TS 38.212 V 15.6.0 (2019-06)

[0010] Non-Patent Document 3: 3GPP TS 38.213 V 15.6.0 (2019-06)

[0011] Non-Patent Document 4: 3GPP TS 38.214 V 15.6.0 (2019-06) Summary of the Invention

[0012] Problems to be solved by the invention

[0013] Research is underway to allocate the same 5G frequency (hereinafter referred to as "local 5G frequency") to multiple licensees. This means that the same frequency is shared by multiple licensees. Using local 5G frequencies may require interference avoidance measures, such as regional adjustments. Meanwhile, mitigating interference is being considered by applying technologies related to the NR-U system that enable autonomous, decentralized interference mitigation based on LBT.

[0014] However, since local 5G frequencies are allocated as common authorized bands depending on the country or region, it is not preferable to always apply technologies related to the NR-U system.

[0015] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to enable coexistence of multiple systems by applying the technology for the unlicensed band in NR according to conditions.

[0016] Means for solving problems

[0017] According to the disclosed technology, a terminal is provided, which comprises: a receiving unit, which receives a specific information element from a base station with the help of system information or dedicated signaling; and a control unit, which, upon receiving the specific information element, applies a technology for an unlicensed frequency band to an object range of the specific information element, and the control unit executes at least LBT (Listen Before Talk) among the technologies for the unlicensed frequency band.

[0018] Effects of the Invention

[0019] The disclosed technology provides a technique for enabling coexistence of multiple systems by applying technology for unlicensed bands in NR according to conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention.

[0021] Figure 2 This is a diagram for explaining a wireless communication system according to an embodiment of the present invention.

[0022] Figure 3 This is a diagram showing an example of local 5G frequency allocation.

[0023] Figure 4 This figure shows an example of using local 5G frequencies.

[0024] Figure 5 It is a timing diagram used to illustrate signaling in an embodiment of the present invention.

[0025] Figure 6 This is a flowchart for explaining the operation of the terminal 20 in the embodiment of the present invention.

[0026] Figure 7 This is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0027] Figure 8 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0028] Figure 9 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 in the embodiment of the present invention. DETAILED DESCRIPTION

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is merely an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0030] When operating the wireless communication system according to the embodiments of the present invention, existing technologies are appropriately used. However, this existing technology is, for example, existing LTE, but is not limited to existing LTE. Furthermore, unless otherwise specified, the term "LTE" used in this specification has a broad meaning encompassing LTE-Advanced and later generations (e.g., NR).

[0031] In addition, in the embodiments of the present invention described below, terms such as SS (Synchronization Signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical Broadcast Channel), PRACH (Physical Random Access Channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel), which are used in conventional LTE, are used. These terms are for ease of description, and the same signals, functions, etc. may also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, etc. However, even signals used in NR are not necessarily marked as "NR-".

[0032] Furthermore, in the embodiment of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, flexible duplex, etc.).

[0033] Furthermore, in the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0034] Figure 1 FIG is a diagram showing a configuration example of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, it includes a base station 10 and a terminal 20. Figure 11 and 1 terminal 20 are shown in each figure, but this is only an example, and multiple base stations 10 and 20 may be provided. Terminal 20 may also be referred to as a "user device." Furthermore, the wireless communication system in this embodiment may also be referred to as an NR-U system.

[0035] Base station 10 is a communication device that provides one or more cells and performs wireless communication with terminal 20. Physical resources of wireless signals are defined in the time domain and the frequency domain. The time domain can be defined by time slots or OFDM symbols, and the frequency domain can be defined by subbands, subcarriers, or resource blocks.

[0036] like Figure 1 As shown, the base station 10 sends control information or data to the terminal 20 via DL (Downlink) and receives control information or data from the terminal 20 via UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output)-based communication to DL or UL. In addition, the base station 10 and the terminal 20 can also communicate via SCell (Secondary Cell) and PCell (Primary Cell) based on CA (Carrier Aggregation).

[0037] The terminal 20 is a communication device with a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, or an M2M (Machine-to-Machine) communication module. Figure 1 As shown, the terminal 20 receives control information or data from the base station 10 via DL and transmits control information or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0038] Figure 2 It is a diagram for explaining a wireless communication system in an embodiment of the present invention. Figure 2 The following shows an example of a configuration of a wireless communication system in which NR-DC (NR-Dual Connectivity) is implemented. Figure 2 As shown, there is a base station 10A serving as a MN (Master Node) and a base station 10B serving as a SN (Secondary Node). The base stations 10A and 10B are each connected to a core network 30. The terminal 20 communicates with both the base stations 10A and 10B.

[0039] The cell group provided by the base station 10A as the MN is called MCG (Master Cell Group), and the cell group provided by the base station 10B as the SN is called SCG (Secondary Cell Group). Figure 1 and Figure 2 Any of the structures in .

[0040] In the wireless communication system of this embodiment, the aforementioned LBT is performed. If the LBT result is idle (if LBT is successful), the base station 10 or terminal 20 obtains the CO (Channel Occupancy) and transmits. If the LBT result is busy (if LBT fails, also expressed as LBT-busy), no transmission is performed.

[0041] The wireless communication system in this embodiment can perform carrier aggregation (CA) using unlicensed CCs and licensed CCs, dual connectivity (DC) using unlicensed CCs and licensed CCs, or standalone (SA) using only unlicensed CCs. CA, DC, or SA can be performed by any one of NR and LTE systems. DC can also be performed by at least two of NR, LTE, and other systems.

[0042] The terminal 20 may assume the presence of a signal (eg, a reference signal (RS) such as a demodulation reference signal (DMRS)) in the PDCCH or group common-PDCCH (GC-PDCCH) for detecting a transmission burst from the apparatus 10 .

[0043] The base station 10 may also transmit a specific PDCCH (PDCCH or GC-PDCCH) including a specific DMRS notifying the start of CO when CO is initiated, triggered by the base station apparatus. At least one of the specific PDCCH and the specific DMRS may also be referred to as a CO start notification signal. The base station 10 transmits the CO start notification signal to, for example, one or more terminals 20. Terminals 20 can identify CO by detecting the specific DMRS.

[0044] Here, the following 1) to 3) show the characteristics of the terminal 20 related to the NR-U technology in Rel-16.

[0045] 1) Functions for fair and effective coexistence between systems

[0046] UL-LBT (including notification of LBT type and priority category)

[0047] Dynamic PDCCH monitoring based on CO detection and notification of CO time-frequency structure

[0048] Mapping extension for PDSCH Type B to efficiently support transmission starting from mid-slot

[0049] HARQ function extensions such as HARQ-ACK feedback or multi-TTI grants based on PDSCH groups

[0050] CG (Configured Grant) functionality extension based on UCI (Uplink Control Information) transmission including CO information and HARQ-ACK notification of DFI (Downlink Feedback Information)

[0051] RLM / RRM (Radio Link Monitoring / Radio Resource Management) including extensions of SS / PBCH Block (Synchronization Signal / Physical Broadcast Channel Block) transmission candidate locations and DRS (Discovery Reference Signal) transmission timing offsets

[0052] RSSI (Received Signal Strength Indicator) / CO measurement for detecting hidden terminals, etc.

[0053] 2) Function to meet OCB (Occupied Channel Bandwidth) requirements (transmitting at least 80% of the system bandwidth)

[0054] Interleaved PUSCH resource allocation

[0055] Extended PUCCH format corresponding to the interleaving type

[0056] PRACH with expanded transmission bandwidth

[0057] 3) A function that uses a wider bandwidth than the 20MHz LBT bandwidth as one carrier (cell)

[0058] Extension of the CORESET (Control Resource Set) and search space for distributing CORESETs across multiple LBT bands

[0059] Notification of the frequency domain structure of the CO based on GC-PDCCH (Group Common-PDCCH)

[0060] Partial interleaving of only a portion of the LBT band

[0061] Figure 3 : is a diagram showing an example of allocation of local 5G frequencies. Figure 3 As shown, frequencies are allocated to Operator A, Operator B, Operator C, and Operator D. For example, in the 4.5 GHz band, local 5G frequencies shared by multiple licensees may be allocated in the range from 4600 MHz to 4800 MHz, or at least a portion thereof. Furthermore, for example, in the 28 GHz band, local 5G frequencies may be allocated in the range from 28.2 GHz to 29.1 GHz, or at least a portion thereof.

[0062] Figure 4 : is a diagram showing an example of using local 5G frequencies. Figure 4 As shown, operator A, which operates a 5G Core Network (5G Core Network), and operator B, which operates another 5G Core Network, use the same frequency for communication. Specifically, local 5G frequencies are a subset of 5G frequencies allocated to multiple licensees, either regionally or on a base station basis, within each country or region.

[0063] When using local 5G frequencies, since the same frequency is used by multiple licensees, interference avoidance measures such as regional adjustments may be required. For example, in areas with dense buildings or factories, complex interference adjustments may be required, potentially impairing convenience and coverage.

[0064] On the other hand, in 3GPP, in Rel-16 NR, the standardization of NR-U technology for unlicensed bands is carried out. For example, through NR-U technology, autonomous decentralized interference adjustment based on LBT can be performed. Even without complex regional adjustments, multiple systems can be mixed in the same frequency band. However, the application frequency of Rel-16NR-U is limited to the 5GHz band and the 6GHz band. In addition, with regard to LTE-LAA, as a 3GPP specification, it is stipulated that it can only be applied in band 46 included in the 5GHz band. Therefore, it is considered not to apply NR-U or LTE-LAA in local 5G frequencies.

[0065] If NR-U technology can be applied to local 5G frequencies, it is believed that even in areas with dense buildings or factories, it will be possible to build a self-operated network without complex regional adjustments. Therefore, it is necessary to enable the application of NR-U technology to local 5G frequencies. However, since local 5G frequencies are allocated as common authorized bands depending on the country or region, it is not preferable to always apply NR-U technology to this authorized band.

[0066] Therefore, by expanding the applicable frequency band of NR-U technology and enabling the setting of whether to apply it, system coexistence based on NR-U technology can be achieved in specific scenarios such as local 5G frequencies.

[0067] Figure 5 It is a timing diagram for illustrating the signaling in the embodiment of the present invention. Figure 5 As shown, in step S1, the base station 10 sends system information containing a specific IE (Information Element) to the terminal 20. Alternatively, in step S2, the base station 10 may also separately send RRC (Radio Resource Control) signaling containing a specific IE to the terminal 20. Regarding step S1 and step S2, either one may be executed, and the execution order may be reversed. The specific IE, for example, refers to adding a new IE to at least one of SIB1 (System Information Block 1), other SIBs, servingCellConfig, MeasObjectNR, etc. The terminal 20 identifies whether the NR-U technology is applied based on the presence or absence of the IE. Figure 6 The operation when the terminal 20 receives a specific IE in step S1 or step S2 is shown.

[0068] Figure 6 This is a flowchart for explaining the operation of the terminal 20 in the embodiment of the present invention. In step S11, the terminal 20 determines whether a specific IE is set. Figure 5 If a specific IE is received from base station 10 and configured in step S1 or step S2 ("Yes" in S11), the process proceeds to step S12. If no specific IE is configured ("No" in S11), the process proceeds to step S13. In step S12, terminal 20 applies NR-U technology. NR-U technology can be applied to each band, each cell, or each frequency. On the other hand, in step S13, terminal 20 does not apply NR-U technology.

[0069] like Figure 5 and Figure 6 As described in , whether or not the NR-U technology is applied is not pre-associated with a band, but is notified to the terminal 20 using system information or RRC signaling.

[0070] When Figure 6 When a specific IE is set in step S11, the terminal 20 can also apply the same assumptions as the NR-U technology in 5GHz / 6GHz to the scope of the specific IE. Therefore, the same assumptions as the NR-U technology in 5GHz / 6GHz can be uniformly applied to the SSB candidate position, SCS (subcarrier spacing), LBT bandwidth, etc.

[0071] In addition, when Figure 6 When a specific IE is set in step S11, the terminal 20 may apply only a portion of the assumptions for the NR-U technology in 5 GHz / 6 GHz to the scope of the specific IE. For example, functions (groups) pre-defined by the specification, such as only UL-LBT and only CO notification based on GC-PDCCH, may be applied to the scope of the specific IE.

[0072] Unlike 5GHz / 6GHz, since coexistence with wireless LANs (Local Area Networks) or compliance with regulations for unlicensed bands (e.g., OCB requirements) is not required, all NR-U technologies do not need to be applied. By applying only some assumptions, existing operations within the applicable range can be reused. The base station 10 can instruct the terminal 20 to apply the NR-U technology settings individually for each function, or to instruct the terminal 20 to apply the NR-U technology settings to multiple functions in a bundle, or to instruct the terminal 20 by combining individual instructions for each function with instructions for multiple functions.

[0073] When only a portion of the NR-U technology in 5GHz / 6GHz is assumed to be applied to the target range of this specific IE in FR1 (Frequency Range 1) outside the 5GHz / 6GHz band (for example, 4.6GHz-4.8GHz, 3.7GHz-3.8GHz), the NR-U technology settings can be applied separately according to each of the following items a)-k). In addition, any one or more of the following items a)-k) may not be applied separately.

[0074] a) Regarding the default assumptions of the SSB transmission candidate positions and the SCS of the SSB within the time slot, the terminal 20 may reuse the existing assumptions for the band as shown in Table 1.

[0075] [Table 1]

[0076]

[0077] As shown in Table 1, the SCS of SSB, the mode of SSB, the range of GSCN (Global Synchronization Raster Channel), etc. can be reused.

[0078] b) As with the NR-U technology, the terminal 20 can extend the SSB transmission candidate positions to all time slots within the 5ms half-frame and use a portion of the PBCH payload to derive the SSB position index. For example, the terminal 20 can also assume a maximum DRS transmission window of 5ms and obtain the LSB 3 bits from the PBCH-DMRS sequence and the MSB 1 bit or 2 bits from the PBCH payload for frame synchronization regarding the SSB position index. In addition, for example, when the DRS transmission window period is set using higher-layer signaling, the terminal 20 can assume the DRS transmission window period.

[0079] c) The terminal 20 may also assume a setting table for NR-U technology as a setting table for CORESET #0 and search space #0. For example, in addition to the PDCCH-MO (Monitoring Occasion) associated with the detected SSB, the terminal 20 may also monitor the MO associated with the SSB candidate position as the QCL.

[0080] d) Regarding the PRACH setting table, the terminal 20 may also assume a PRACH setting table for NR-U technology.

[0081] e) Regarding the RAR (Random Access Response) window size, the terminal 20 may assume that it is 10 ms or longer.

[0082] f) Regarding the content of the RAR-UL grant, the terminal 20 may also assume the same content as that for the NR-U technology.

[0083] g) Regarding the default PDSCH mapping type A table, the terminal 20 may also assume a table oriented to the NR-U technology.

[0084] h) Regarding the DCI format to be monitored, the terminal 20 may also assume that it is as set by the search space configuration. For example, the search space configuration can be used to set whether it is a DCI format for NR-U technology (e.g., including fields such as LBT type and priority category) or another DCI format.

[0085] i) Regarding the GC-PDCCH content, the terminal 20 may assume that whether the CO structure information or LBT bandwidth information for the NR-U technology is included is set by higher-layer signaling such as SlotFormatCombinationsPerCell. For example, whether the GC-PDCCH content for the NR-U technology is included and the bit position of the DCI content can be set by higher-layer signaling.

[0086] j) Regarding the PUCCH format, the terminal 20 can assume that whether to use ePF0 / 1 / 2 / 3 for NR-U technology or the normal PF0 / 1 / 2 / 3 / 4 is set as per higher layer signaling such as PUCCH setting.

[0087] k) The terminal 20 may assume that an action oriented towards the NR-U technology is applied in RLM, that is, an action for samples determined to be RLM-RS and not transmitted due to LBT failure.

[0088] In addition, when the NR-U technology is applied, regarding the UL LBT bandwidth, the terminal 20 can assume the bandwidth of the activated UL-BWP or the LBT bandwidth set by the base station 10. For example, it is possible to assume that the activated UL-BWP bandwidth is the UL-LBT bandwidth and perform UL-LBT. In addition, for example, the base station 10 may notify the terminal 20 of the setting related to the LBT bandwidth using higher layer signaling, and the terminal 20 may perform UL LBT in the LBT bandwidth indicated by the setting.

[0089] When NR-U technology is applied in FR2 (e.g., 28.2 GHz-29.1 GHz), the base station 10 may not expand the maximum number of SSB transmission candidate locations, but may notify the terminal 20 of information related to the QCL (Quasi Co-Location) between the candidate locations through the MIB (Master Information Block) or SIB1. That is, multiple SSB transmission candidate locations may be QCLs, and synchronization may be performed based on the QCL relationship. In addition, any one or more of the following items 1)-o) may also be applied.

[0090] 1) Regarding the default assumption of the SSB transmission candidate position within the time slot or the SCS of the SSB, the terminal 20 can reuse the existing assumption of this band in FR2.

[0091] m) Terminal 20 may not expand the number of SSB transmission candidate positions but may directly assume it to be a maximum of 64.

[0092] n) The terminal 20 may receive information for deriving the QCL relationship between SSB transmission candidate positions using a reservation entry in the setting table of search space #0. Alternatively, for example, information for deriving the QCL relationship between SSB transmission candidate positions may be notified via SIB1.

[0093] o) The terminal 20 can also be assumed in the same way as when the NR-U technology is applied to FR1.

[0094] In addition, the terminal 20 may also report to the base station 10 whether the NR-U technology can be applied in a certain frequency band as a UE capability. Furthermore, the terminal 20 may report to the base station 10 whether the NR-U technology can be applied as a UE capability for each frequency band, or may report to the base station 10 whether the NR-U technology can be applied as a UE capability regardless of the frequency band. This UE capability may be specified in association with whether the unlicensed band is supported, or may be specified independently. For example, the terminal 20 corresponding to the unlicensed band may necessarily have the UE capability of being able to apply the NR-U technology.

[0095] According to the above embodiment, the terminal 20 is able to apply NR-U technology in the local 5G frequency included in the authorized frequency band as needed.

[0096] That is, in a wireless communication system, multiple systems can coexist by applying NR's unlicensed band-oriented technologies according to conditions.

[0097] (Device Structure)

[0098] Next, the functional configuration examples of the base station 10 and terminal 20 that perform the above-described processing and operations are described. The base station 10 and terminal 20 include functions for implementing the above-described embodiments. However, the base station 10 and terminal 20 may each include only a portion of the functions described in the embodiments.

[0099] <Base Station 10>

[0100] Figure 7 FIG is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention. Figure 7 As shown, the base station 10 includes a transmitting unit 110 , a receiving unit 120 , a setting unit 130 , and a control unit 140 . Figure 7 The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be executed.

[0101] The sending unit 110 has a function of generating a signal to be sent to the terminal 20 side and transmitting the signal wirelessly. In addition, the sending unit 110 sends inter-network node messages to other network nodes. The receiving unit 120 includes a function of wirelessly receiving various signals sent from the terminal 20 and obtaining, for example, higher-layer information from the received signals. In addition, the sending unit 110 has a function of sending NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, and reference signals to the terminal 20. In addition, the receiving unit 120 receives inter-network node messages from other network nodes. In addition, the sending unit 110 notifies the terminal 20 of information indicating whether the NR-U technology is applied. In addition, the sending unit 110 and the receiving unit 120 can also be referred to as communication units.

[0102] The configuration unit 130 stores pre-set configuration information and various configuration information sent to the terminal 20 in a storage device and reads it from the storage device as needed. The configuration information includes, for example, information required for NR-U technology.

[0103] As described in the embodiment, the control unit 140 performs control related to the NR-U technology. Alternatively, the functional units related to signal transmission in the control unit 140 may be included in the transmitter 110, and the functional units related to signal reception in the control unit 140 may be included in the receiver 120.

[0104] <Terminal 20>

[0105] Figure 8 FIG is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention. Figure 8 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 8The functional configuration shown is merely an example, and any functional divisions and names of functional units may be used as long as the operations according to the embodiments of the present invention can be executed.

[0106] The transmitter 210 generates a transmission signal based on transmission data and wirelessly transmits the signal. The receiver 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiver 220 receives NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, and the like transmitted from the base station 10. For example, for D2D communication, the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), and the like to other terminals 20, while the receiver 220 receives PSCCH, PSSCH, PSDCH, or PSBCH from other terminals 20. The function of performing LBT is related to transmission and is therefore performed by the transmitter 210. Alternatively, the function of executing LBT may be provided in the receiving unit 220. In addition, the transmitting unit 210 and the receiving unit 220 may also be referred to as a communication unit.

[0107] The configuration unit 230 stores various configuration information received by the receiving unit 220 from the base station 10 or the terminal 20 in a storage device and reads it from the storage device as needed. Furthermore, the configuration unit 230 also stores pre-set configuration information. This configuration information may include information required for NR-U technology.

[0108] As described in the embodiment, the control unit 240 controls the NR-U technology in the terminal 20. The functional units related to signal transmission in the control unit 240 may be included in the transmitter 210, and the functional units related to signal reception in the control unit 240 may be included in the receiver 220.

[0109] (Hardware Structure)

[0110] The block diagram used in the description of the above embodiment ( Figure 7 and Figure 8) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections) and using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0111] Functionally, these include, but are not limited to, judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that enables the transmission function is called a transmitting unit or a transmitter. As mentioned above, there is no particular limitation on the implementation method.

[0112] For example, the base station 10 , the terminal 20 , and the like in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 9 This figure shows an example of the hardware configuration of a base station 10 and a terminal 20 according to one embodiment of the present disclosure. The base station 10 and the terminal 20 described above can also 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, and the like.

[0113] In the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0114] The various functions in the base station 10 and the terminal 20 are implemented by reading predetermined software (programs) into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0115] Processor 1001 controls the entire computer by, for example, running an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, a computing device, registers, and the like. For example, control unit 140 and control unit 240 described above may also be implemented by processor 1001.

[0116] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes based on the program. As a program, a program that causes the computer to execute at least a part of the actions described in the above embodiment is used. For example, Figure 7 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. Figure 8 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and executed by the processor 1001. Regarding the various processes described above, although they are described as being executed by a single processor 1001, they can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented on one or more chips. Furthermore, the program can be transmitted from a network via a telecommunications line.

[0117] The storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and RAM (Random Access Memory). The storage device 1002 may also be referred to as a register, cache, or main memory (main storage device). The storage device 1002 can store executable programs (program code), software modules, and the like for implementing the communication method according to one embodiment of the present disclosure.

[0118] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic stripe, and the like. The above-mentioned recording medium may be, for example, a database, a server, or other appropriate medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0119] Communication device 1004 is hardware (a transceiver) used to facilitate communication between computers via at least one of a wired network and a wireless network. It may also be referred to as a network device, network controller, network card, or communication module. Communication device 1004 may include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, communication device 1004 may also implement a transceiver antenna, an amplifier, a transceiver, a transmission path interface, and the like. The transceiver may also be physically or logically separated from the transmitter and receiver.

[0120] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, LED light, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrally formed (e.g., a touch panel).

[0121] Furthermore, the processor 1001, the storage device 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using separate buses for each device.

[0122] Furthermore, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or an FPGA (Field Programmable Gate Array), and may implement some or all of the functional blocks using this hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0123] (Summary of Implementation Methods)

[0124] As described above, according to an embodiment of the present invention, a terminal is provided, comprising: a receiving unit, which receives a specific information element from a base station with the aid of system information or dedicated signaling; and a control unit, which, upon receiving the specific information element, applies a technology for an unlicensed band to an object scope of the specific information element, and the control unit executes at least LBT (Listen Before Talk) among the technologies for the unlicensed band.

[0125] According to the above embodiment, the terminal 20 can apply NR-U technology to the local 5G frequency included in the licensed band as needed. In other words, in the wireless communication system, multiple systems can coexist by applying NR technologies for the unlicensed band according to conditions.

[0126] The object range can be set according to each band, each cell, or each frequency included in the authorized frequency band. According to this structure, the terminal 20 can apply NR-U technology in the local 5G frequency included in the authorized frequency band as needed.

[0127] The control unit may also apply all or part of the unlicensed band-oriented technology to the target range of the specific information element. According to this structure, the terminal 20 can apply the NR-U technology to the local 5G frequency included in the licensed band as needed.

[0128] The control unit may also assume that the activated uplink BWP (Bandwidth Part) is the LBT bandwidth. According to this configuration, the terminal 20 can perform LBT in the local 5G frequency included in the licensed band.

[0129] The receiving unit may also receive information related to QCL (Quasi Co-Location) between SSB (SS / PBCH block) transmission candidate positions from the base station. When the control unit applies the technology for unlicensed bands in FR2 (Frequency Range 2), the maximum number of SSB transmission candidate positions is not expanded, but synchronization is performed based on the information related to QCL between SSB transmission candidate positions. With this structure, the terminal 20 can efficiently perform synchronization in the local 5G frequency included in the licensed band.

[0130] In addition, according to an embodiment of the present invention, a communication method is provided, wherein the terminal performs the following steps: a receiving step, receiving a specific information element from a base station with the help of system information or dedicated signaling; and a control step, when the specific information element is received, applying a technology for an unlicensed band to an object range of the specific information element, wherein the control step includes executing at least an LBT (ListenBefore Talk) process among the technologies for the unlicensed band.

[0131] According to the above embodiment, the terminal 20 can apply NR-U technology to the local 5G frequency included in the licensed band as needed. In other words, in the wireless communication system, multiple systems can coexist by applying NR technology for the unlicensed band according to conditions.

[0132] (Supplementary Implementation Methods)

[0133] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, substitutions, replacements, etc. In order to facilitate understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values are only examples, and any appropriate values may also be used. The distinction between the items in the above description is not essential to the present invention. The matters recorded in two or more items can be combined and used as needed, and the matters recorded in one item can be applied to the matters recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing procedures described in the embodiments, the order of processing can be reversed if there is no contradiction. For the convenience of explaining the processing, the base station 10 and the terminal 20 are described using functional block diagrams, but such devices can also be implemented using hardware, software, or a combination thereof. The software that operates by the processor of the base station 10 according to the embodiment of the present invention and the software that operates by the processor of the terminal 20 according to the embodiment of the present invention can also 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 and any other appropriate storage medium.

[0134] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0135] Each form / embodiment described in this disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), systems using other appropriate systems, and next-generation systems extended therefrom. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be applied.

[0136] The processing procedures, timings, and flows of each form / implementation described in this specification may be performed in a different order unless there is a conflict. For example, the methods described in this disclosure use an illustrative order to present the elements of various steps, but are not limited to the specific order presented.

[0137] In this specification, specific actions performed by base station 10 may also be performed by its upper node, depending on the situation. In a network consisting of one or more network nodes including base station 10, it is obvious that various actions performed to communicate with terminal 20 can be performed by at least one of base station 10 and other network nodes other than base station 10 (e.g., MME or S-GW, but not limited to these). While the above example illustrates a single other network node other than base station 10, the other network node may also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0138] The information or signals described in this disclosure can be output from a higher layer (or lower layer) to a lower layer (or higher layer), and can also be input or output via multiple network nodes.

[0139] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0140] The determination in the present disclosure may be performed using a value represented by one bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values (for example, comparison with a predetermined value).

[0141] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to instructions, sets of instructions, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0142] Furthermore, software, commands, information, and the like may be transmitted and received via a transmission medium. For example, if software is transmitted from a web page, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, DSL, etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0143] The information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be referred to in the entire description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0144] In addition, the terms used in this disclosure and those 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 also be referred to as a carrier frequency, a cell, or a frequency carrier.

[0145] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0146] In addition, the information, parameters, etc. described in this disclosure may be represented by absolute values, relative values relative to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0147] The names used for the above parameters are not limiting in any way. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way.

[0148] In this disclosure, terms such as "base station (BS)," "wireless base station," "base station apparatus," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, and picocells.

[0149] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of at least one of the base station and base station subsystem that provide communication services within the coverage area.

[0150] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0151] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: 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 appropriate terms.

[0152] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes 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.

[0153] In addition, the base station in the present disclosure can also be replaced by a user terminal. For example, regarding a structure in which the communication between the base station and the user terminal is replaced by the communication between multiple terminals 20 (for example, it can also be called D2D (Device-to-Device: device to device), V2X (Vehicle-to-Everything: vehicle to everything system), etc.), the various forms / implementations of the present disclosure can also be applied. In this case, it can also be set as a structure in which the terminal 20 has the functions of the above-mentioned base station 10. In addition, the terms "uplink" and "downlink" can also be replaced by terms corresponding to the communication between terminals (for example, "side"). For example, the uplink channel, downlink channel, etc. can also be replaced by the side channel.

[0154] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may also have the functions of the user terminal described above.

[0155] As used in this disclosure, terms such as “determining” and “determining” sometimes include a variety of actions. For example, “determining” and “judging” may include considering matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searching in a table, database or other data structure), confirmed (for example, ascertained) as matters that have been “judged” or “determined”. In addition, “determining” and “receiving” (for example, receiving information), transmitting (for example, sending information), inputting, outputting, accessing (for example, accessing data in a memory) as matters that have been “judged” or “determined”. In addition, “determining” and “resolving” may include considering matters that have been selected, chosen, established, compared, etc. as matters that have been “judged” or “determined”. That is, "judgment" and "decision" can include matters that are considered to have "judged" or "decided" any action. In addition, "judgment (decision)" can also be replaced by "assuming (assuming)," "expecting (expecting)", "considering (considering)" and the like.

[0156] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include situations where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used instead of "connection". In the context of the present disclosure, two elements may be considered to be "connected" or "coupled" to each other by using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy having a wavelength in the wireless frequency domain, the microwave region and the light (including both visible and invisible) region.

[0157] The reference signal may be referred to as RS (Reference Signal) for short, or may be called a pilot signal depending on the applied standard.

[0158] The phrase "according to" used in this disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to."

[0159] Any reference to an element using the terms "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These terms can be used as a convenient way to distinguish between two or more elements in this disclosure. Therefore, a reference to a first element and a second element does not imply that only two elements can be used or that the first element must precede the second element in any form.

[0160] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section,” “circuit,” “device,” or the like.

[0161] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0162] A radio frame can be composed of one or more frames in the time domain. In the time domain, one or more frames can be called a subframe. A subframe can be composed of one or more time slots in the time domain. A subframe can be a fixed time length (e.g., 1 ms) that is independent of the numerology.

[0163] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set may represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by the transceiver in the frequency domain, specific windowing performed by the transceiver in the time domain, and the like.

[0164] A slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a parameter set.

[0165] A time slot may contain multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in time units larger than a mini-slot may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be referred to as PDSCH (or PUSCH) mapping type B.

[0166] Radio frame, subframe, time slot, mini-time slot, and symbol all represent time units for signal transmission. Radio frame, subframe, time slot, mini-time slot, and symbol may be referred to by other corresponding names.

[0167] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can be called a TTI, and a slot or minislot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can be a slot, a minislot, or the like, rather than a subframe.

[0168] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each terminal 20 by allocating wireless resources (such as the frequency bandwidth and transmit power available to each terminal 20) in units of TTI. The definition of TTI is not limited to this.

[0169] A TTI can be a unit of time for transmitting data packets (transport blocks), code blocks, code words, etc. after channel coding, or a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is assigned, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0170] In addition, when one time slot or one mini-time slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can constitute the minimum time unit of scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of scheduling can be controlled.

[0171] A TTI with a time length of 1 ms is also called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a time slot, etc.

[0172] In addition, for long TTI (for example, normal TTI, subframe, etc.), it can be replaced with a TTI with a time length of more than 1ms, and for short TTI (for example, shortened TTI, etc.), it can be replaced with a TTI length that is smaller than long TTI (longTTI) and has a TTI length of more than 1ms.

[0173] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined by the parameter set.

[0174] In addition, the time domain of an RB may include one or more symbols and may be the length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0175] In addition, one or more RBs may be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like.

[0176] 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.

[0177] A bandwidth part (BWP) (also known as a fractional bandwidth) can represent a subset of contiguous common resource blocks (RBs) used for a parameter set within a carrier. Common RBs can be identified by their index relative to the common reference point of the carrier. PRBs can be defined within a BWP and numbered within that BWP.

[0178] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured for a UE within a single carrier.

[0179] At least one of the configured BWPs may be active, and it may not be assumed that the UE transmits or receives predetermined signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

[0180] The above-described structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the structures including the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots in a slot, the number of symbols and RBs in a slot or mini-slot, the number of subcarriers in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length.

[0181] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure also includes cases where the noun following the article is in plural form.

[0182] In this disclosure, the phrase "A and B are different" may also mean "A and B are different from each other." Furthermore, the phrase may also mean "A and B are each different from C." Terms such as "separate" and "combined" may also be interpreted in the same way as "different."

[0183] Each form / implementation described in this disclosure may be used individually or in combination, and may be switched between them depending on the execution. Furthermore, notification of scheduled information is not limited to being performed explicitly (e.g., a notification of "yes X") but may also be performed implicitly (e.g., not notifying the scheduled information).

[0184] In this disclosure, NR-U technology is an example of technology for unlicensed bands. FR is an example of a frequency range.

[0185] While the present disclosure has been described in detail above, it should be 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 various modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes only and does not have any limiting meaning on the present disclosure.

[0186] Label Description

[0187] 10: base station;

[0188] 110: Sending department;

[0189] 120: receiving unit;

[0190] 130: Setting department;

[0191] 140: Control Department;

[0192] 20: terminal;

[0193] 210: Sending department;

[0194] 220: receiving unit;

[0195] 230: Setting department;

[0196] 240: Control Department;

[0197] 30: core network;

[0198] 1001: processor;

[0199] 1002: storage device;

[0200] 1003: auxiliary storage device;

[0201] 1004: Communication device;

[0202] 1005: input device;

[0203] 1006: Output device.

Claims

1. A terminal comprising: a transmitting unit configured to transmit, in an uplink, terminal capability information indicating whether a function for the unlicensed band is supported for each frequency band, for frequency bands including the unlicensed band and the licensed band; and a control unit configured to control reception of setting information related to a function for the unlicensed band based on the terminal capability information; The configuration information includes information indicating a bit position where information indicating channel occupancy related to a group-common downlink control channel is included in the downlink control information.

2. A base station, wherein: The base station has: a receiving unit configured to receive, from a terminal, terminal capability information indicating whether a function for the unlicensed band is supported for each frequency band including the unlicensed band and the licensed band; as well as a control unit configured to control the transmission of setting information related to functions for unlicensed bands to the terminal based on the terminal capability information; The configuration information includes information indicating a bit position where information indicating channel occupancy related to a group-common downlink control channel is included in the downlink control information.

3. A communication method performed by a terminal, wherein: The communication method has the following steps: For frequency bands including unlicensed bands and licensed bands, transmitting terminal capability information indicating whether the terminal supports functions for unlicensed bands for each frequency band in the uplink; as well as controlling reception of setting information related to functions for the unlicensed band based on the terminal capability information, The configuration information includes information indicating a bit position where information indicating channel occupancy related to a group-common downlink control channel is included in the downlink control information.

4. A communication system having a base station and a terminal, wherein: The terminal transmits, for frequency bands including unlicensed frequency bands and licensed frequency bands, terminal capability information indicating whether a function oriented to the unlicensed frequency band is supported for each frequency band to the base station in an uplink; The terminal controls, based on the terminal capability information, reception of setting information related to a function for the unlicensed band; receiving, by the base station, the terminal capability information from the terminal; The base station sends the setting information to the terminal, The configuration information includes information indicating a bit position where information indicating channel occupancy related to a group-common downlink control channel is included in the downlink control information.

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