Terminal and communication method

Abstract

A terminal is provided with: a control unit that determines a modulation scheme and a subcarrier spacing to be supported in a specific frequency band; and a communication unit that performs communication in the specific frequency band by applying the determined modulation scheme and subcarrier spacing, and the control unit determines the supported modulation scheme in each of a downlink and an uplink, and determines a combination of the supported subcarrier spacing.

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 power saving are being studied (for example, non-patent document 1).

[0003] Furthermore, in systems beyond 5G, research is underway to more efficiently utilize bandwidth, for example to expand coverage, and to introduce new frequency bands to further increase service capacity.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 38.300 V17.3.0 (2022-12) Summary of the Invention

[0007] Problems to be solved by the invention

[0008] Supporting a new frequency band requires determining several basic functions, such as the radio frame structure for that frequency band.

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to determine a radio frame structure corresponding to a frequency band in a radio communication system.

[0010] Means for solving problems

[0011] According to the disclosed technology, a terminal is provided, comprising: a control unit that determines a modulation method and a subcarrier spacing supported in a specific frequency band; and a communication unit that applies the determined modulation method and the determined subcarrier spacing to communicate in the specific frequency band, wherein the control unit determines the supported modulation method and determines the supported combination of the subcarrier spacing in the downlink and uplink, respectively.

[0012] Effects of the Invention

[0013] According to the disclosed technology, in a wireless communication system, a wireless frame structure corresponding to a frequency band can be determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A diagram showing a configuration example of a wireless communication system.

[0015] Figure 2 This is a diagram showing an example of a new frequency band according to the embodiment of the present invention.

[0016] Figure 3 This is a timing chart for explaining an example of operation in a new frequency band according to the embodiment of the present invention.

[0017] Figure 4 This is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention.

[0018] Figure 5 This is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention.

[0019] Figure 6 This is a diagram showing an example of the hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention.

[0020] Figure 7 1 is a diagram showing an example of the structure of a vehicle 2001 in the embodiment of the present invention. DETAILED DESCRIPTION

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying 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.

[0022] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies are appropriately used. Examples of such existing technologies include, but are not limited to, existing LTE. Furthermore, unless otherwise specified, the term "LTE" used in this specification has a broad meaning encompassing LTE-Advanced and subsequent technologies (e.g., NR).

[0023] 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) used in existing LTE are used. These are for convenience 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, etc. However, even signals used for NR are not necessarily explicitly recorded as "NR-".

[0024] 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 another method (eg, Flexible Duplex, etc.).

[0025] 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 .

[0026] Figure 1 1 is a diagram showing a configuration example (1) of a wireless communication system in an embodiment of the present invention. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10 and a terminal 20. Figure 1 In the figure, one base station 10 and one terminal 20 are shown, but this is only an example, and there may be multiple base stations and terminals.

[0027] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. The base station 10 sends synchronization signals and system information to the terminal 20. Synchronization signals are, for example, NR-PSS and NR-SSS. System information is sent, for example, through NR-PBCH, also called broadcast information. The synchronization signal and system information may also be referred to as SSB (SS / PBCH block). As shown in FIG. Figure 1 As shown, the base station 10 sends a control signal or data to the terminal 20 via DL (Downlink), and receives a control signal 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 communications to DL or UL. In addition, the base station 10 and the terminal 20 can also communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Furthermore, the terminal 20 can also communicate via the primary cell of the base station 10 based on DC (Dual Connectivity) and the primary and secondary cell group cells (PSCell: Primary SCG Cell) of other base stations 10.

[0028] The terminal 20 is a communication device having 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, terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Furthermore, terminal 20 receives various reference signals transmitted from base station 10 and measures propagation path quality based on the reception results of these reference signals.

[0029] Terminal 20 can perform carrier aggregation, which bundles multiple cells (multiple CCs) to communicate with base station 10. Carrier aggregation uses one PCell (Primary Cell) and one or more SCells (Secondary Cells). Alternatively, a PUCCH-SCell with a PUCCH can be used.

[0030] Figure 2 FIG is a diagram showing an example of a new frequency band according to an embodiment of the present invention. Figure 2 As shown, the frequency band between FR1 (Frequency Range 1) and FR2 (Frequency Range 2) is considered as a candidate for a new frequency band. For example, the 7.025-7.125 GHz and 10.0-10.5 GHz frequency bands can be newly supported. This frequency band can be called FR3 (Frequency Range 3), or another name.

[0031] In addition, as a candidate for a new frequency band, a frequency band exceeding FR2 is envisioned. For example, a frequency band of 72-100 GHz or higher may be newly supported. This frequency band may be called, for example, FR4 (Frequency Range 4) or another name.

[0032] FR3 is expected to have a higher likelihood of gaining support, and its use in IMT is currently under consideration at the World Radiocommunication Conference (WRC-23). ​​Furthermore, FR3 has lower frequencies than FR2, making it more practical.

[0033] To support new frequency bands, several basic functions need to be determined, including frame structure, initial access procedure, physical layer control, scheduling specifications, HARQ (Hybrid Automatic Repeat Request) specifications, and MIMO specifications.

[0034] For example, the frame structure to be determined includes the channel bandwidth, waveform, and subcarrier spacing. Therefore, the channel bandwidth, waveform, or subcarrier spacing may be determined as described below.

[0035] Figure 3 This is a sequence diagram illustrating an example of operation in a new frequency band according to an embodiment of the present invention. In step S1, terminal 20 determines the channel bandwidth, waveform, and / or subcarrier spacing to be applied in FR3. In the following step S2, terminal 20 performs communications in FR3 using the determined channel bandwidth, waveform, and / or subcarrier spacing.

[0036] The following describes the operation of determining the channel bandwidth.

[0037] The set of channel bandwidths supported in FR3 may be 1)-3) shown below.

[0038] 1) It can also be a set of channel bandwidths that are the same as FR1. This can reduce the impact on standards and installation.

[0039] 2) It can also be a set of channel bandwidths that are the same as FR2, thereby reducing the impact on regulations and installation.

[0040] 3) It may also be a set of channel bandwidths different from FR1 and / or FR2. In this way, it is possible to utilize the optimized channel bandwidth.

[0041] In FR3, the channel bandwidth may be at least one of 1)-3) shown below.

[0042] 1) The frequency range may also be from 100 MHz to 400 MHz. For example, {400, 300, 200, 190, 180, 175, 170, 160, 150, 140, 130, 125, 120, 110, 100} [MHz] can be used. This allows for a balance between the throughput of a wider bandwidth and the frequency reuse capacity of a narrower bandwidth.

[0043] 2) It can also be below 100 MHz. For example, it can support the same channel bandwidth as that supported by FR1. This enables flexible coexistence between different operators.

[0044] 3) It can also be 400 MHz or higher. For example, it can be 500 MHz. This allows for higher throughput based on a wider bandwidth.

[0045] Furthermore, part or all of the set of channel bandwidths that can be used in FR1 or FR2 can also be used in FR3.

[0046] Furthermore, for example, the channel bandwidths supported in FR3 may be one or more bandwidths exceeding 100 MHz and one or more bandwidths below 100 MHz.

[0047] Furthermore, for example, the channel bandwidths supported in FR3 may be one or more bandwidths less than 50 MHz and one or more bandwidths greater than 50 MHz.

[0048] Furthermore, for example, the channel bandwidth supported in FR3 may be a part or all of 1) to 3) shown below.

[0049] 1) One or more bandwidths less than 50 MHz.

[0050] 2) One or more bandwidths from 50 MHz to 100 MHz.

[0051] 3) One or more bandwidths exceeding 100 MHz.

[0052] Furthermore, for example, the maximum channel bandwidth supported in FR3 may be part or all of 1) to 3) shown below.

[0053] 1) 100 MHz. This enables flexible coexistence between different operators.

[0054] 2) A bandwidth greater than 100 MHz and less than 400 MHz, for example, 150, 200, or 300 MHz. This allows for greater throughput than FR1.

[0055] 3) 400 MHz. This can achieve throughput equivalent to FR2.

[0056] Furthermore, for example, the minimum channel bandwidth supported in FR3 may be part or all of 1) to 4) shown below.

[0057] 1) 5MHz. This enables flexible coexistence between different operators.

[0058] 2) A bandwidth exceeding 5 MHz and less than 50 MHz. This allows for a synchronization raster smaller than FR1.

[0059] 3) 50 MHz. This allows for a synchronization grid smaller than FR1.

[0060] 4) Bandwidth exceeding 50 MHz. This allows for a shorter synchronization grid than FR2.

[0061] Furthermore, for example, the maximum channel bandwidth and / or the minimum channel bandwidth supported in FR3 may also differ depending on the frequency band.

[0062] For example, a maximum channel bandwidth and / or minimum channel bandwidth of 5 MHz to 100 MHz can be supported in the frequency band of 7.025 GHz to 7.125 GHz, and a maximum channel bandwidth and / or minimum channel bandwidth of 20 MHz to 200 MHz can be supported in the frequency band of 10.0 GHz to 10.5 GHz.

[0063] Furthermore, for example, the number of candidates for the channel bandwidth supported in FR3 may be part or all of 1) to 3) shown below.

[0064] 1) The number of channel bandwidth candidates exceeds 10. This enables flexible band structure and coexistence between UEs or between operators.

[0065] 2) The number of channel bandwidth candidates is 4 to 10. This can reduce the number of test patterns and / or reduce the fragmentation of UE capabilities compared to FR1.

[0066] 3) The number of channel bandwidth candidates is less than 4. This can reduce the number of test patterns and / or reduce the fragmentation of UE capabilities compared to FR2.

[0067] Furthermore, in FR3, whether support of channel bandwidth is mandatory or optional may also be defined as follows.

[0068] For example, the necessary channel bandwidth supported in FR3 may be any one of 1) to 3) shown below.

[0069] 1) You can also set support for the same set as FR1 as required.

[0070] 2) It is also possible to set support for the same set as FR2 as required.

[0071] 3) Support for a different set than FR1 and / or FR2 may also be required.

[0072] For example, whether the channel bandwidth defined or supported in FR3 is mandatory or optional can be specified as any one of 1) to 9) shown below.

[0073] 1) Support for N channel bandwidths in ascending order from the minimum can be made mandatory, while support for other channel bandwidths can be made optional. This can reduce the installation load for UEs using FR3. N can be defined by the specification and can be, for example, 1, 2, 3, 4, or 5.

[0074] 2) Support for channel bandwidths below X MHz can also be made mandatory, while support for other channel bandwidths can be made optional. This can reduce the installation load for UEs using FR3. X can be defined by the specification, for example, 5, 10, 20, 30, 40, 50, or 100.

[0075] 3) Support for N channel bandwidths in descending order from the maximum value can also be made mandatory, while support for other channel bandwidths can be made optional. This can improve system performance. N can be defined by the specification, for example, 1, 2, 3, 4, or 5.

[0076] 4) Support for channel bandwidths above X MHz can also be made mandatory, while support for other channel bandwidths can be made optional. This can improve system performance. X can be defined by the specification, for example, 5, 10, 20, 30, 40, 50, or 100.

[0077] 5) It is also possible to set support for only specific channel bandwidths as mandatory, while support for other channel bandwidths is optional. The specific channel bandwidth can be flexibly set to small, medium, or large. For example, the specific channel bandwidth can be a channel bandwidth less than 50 MHz, similar to FR1, a channel bandwidth inherently between 50 MHz and 100 MHz, similar to FR3, or a channel bandwidth exceeding 100 MHz, similar to FR2.

[0078] 6) Support for all channel bandwidths specified in FR3 may also be set as mandatory.

[0079] 7) Support for all channel bandwidths specified in FR3 can also be made optional.

[0080] 8) The channel bandwidth value is not restricted, and the minimum number of channel bandwidths that must be supported can be specified. For example, supporting at least one channel bandwidth can be set as required, or supporting at least three channel bandwidths can be set as required.

[0081] 9) The channel bandwidth value is not restricted, and the maximum number of channel bandwidths that must be supported can be specified. For example, supporting a maximum of five channel bandwidths can be set as required.

[0082] Furthermore, in FR3, CP-OFDM (Cyclic-Prefix OFDM) and / or DFT-S-OFDM (Discrete Fourier Transform-Spread-OFDM) can be supported.

[0083] For example, in FR3, similar to FR1 and FR2, CP-OFDM may be supported for downlink, and CP-OFDM and DFT-S-OFDM may be supported for uplink.

[0084] For example, in FR3, waveforms different from those in FR1 or FR2 may also be supported.

[0085] Table 1 shows examples of waveforms supported in FR3.

[0086] [Table 1]

[0087]

[0088] As shown in Alt-1 of Table 1, CP-OFDM can be supported in DL and UL, and DFT-S-OFDM can be supported in UL. This enables implementation similar to FR1 and FR2.

[0089] As shown in Alt-2 of Table 1, CP-OFDM can be supported in both DL and UL, and DFT-S-OFDM can be supported in both DL and UL. Supporting DFT-S-OFDM in DL can extend coverage.

[0090] As shown in Alt-3 of Table 1, CP-OFDM can be supported in both DL and UL. This reduces the implementation load by supporting a single waveform.

[0091] As shown in Alt-4 of Table 1, CP-OFDM can be supported in DL and UL, and DFT-S-OFDM is supported in DL.

[0092] As shown in Alt-5 of Table 1, CP-OFDM may be supported in DL, and DFT-S-OFDM may be supported in DL and UL.

[0093] As shown in Alt-6 of Table 1, CP-OFDM may be supported in DL and DFT-S-OFDM may be supported in UL.

[0094] As shown in Alt-7 of Table 1, CP-OFDM may be supported in UL, and DFT-S-OFDM may be supported in DL and UL.

[0095] As shown in Alt-8 of Table 1, CP-OFDM may be supported in UL and DFT-S-OFDM may be supported in DL.

[0096] As shown in Alt-9 in Table 1, DFT-S-OFDM can be supported in DL and UL.

[0097] In addition, in FR3, for the channel bandwidth to which a certain SCS is applied, the minimum supported guard band (GuardBand) or number of RBs can be any one of 1)-3) shown below.

[0098] 1) The minimum guard band may be the same as that of the same channel bandwidth in FR1 and / or FR2 with the same SCS applied. This allows the spectral filter installation in FR1 and / or FR2 to be reused.

[0099] 2) The minimum guard band may be wider than the minimum guard band of the same channel bandwidth with the same SCS in FR1 and / or FR2. This simplifies installation compared to installation of spectrum filters in FR1 and / or FR2.

[0100] 3) The minimum guard band may be narrower than the minimum guard band of the same channel bandwidth with the same SCS applied in FR1 and / or FR2. This can improve resource utilization efficiency.

[0101] Furthermore, in FR3, guard bands other than the minimum guard band may also be defined. That is, a terminal 20 capable of implementing this guard band may generate a higher-quality signal than a terminal 20 implementing only the minimum guard band, achieving the same frequency band while further reducing interference with adjacent frequency bands.

[0102] Furthermore, whether CP-OFDM or DFT-S-OFDM is supported for DL ​​or UL may be specified as in either 1) or 2) below.

[0103] 1) All terminals 20 supporting FR3 can also support all waveforms for DL ​​and UL, thereby enabling more flexible operation.

[0104] 2) A terminal 20 that supports FR3 may not support all waveforms for DL ​​or UL. This can reduce the installation load of the terminal.

[0105] Table 2 shows an example of SCS supported in FR3.

[0106] [Table 2]

[0107] Alt# 15 30 60 120 240 Alt-1 yes yes yes no no Alt-2 no no yes yes yes Alt-3 no yes yes yes no Alt-4 no yes yes no no Alt-5 no no yes yes no

[0108] As shown in Alt-1 in Table 2, the supported SCSs are 15kHz, 30kHz, and 60kHz, enabling the same installation as FR1.

[0109] As shown in Alt-2 in Table 2, the supported SCSs are 60kHz, 120kHz, and 240kHz, enabling the same installation as FR2.

[0110] As shown in Alt-3 in Table 2, the supported SCSs are 30kHz, 60kHz, and 120kHz. This allows for the same installation as FR2. This allows for the use of a combination of SCSs optimized for FR3.

[0111] As shown in Alt-4 in Table 2, the supported SCSs are 30kHz and 60kHz. This enables the same installation as FR1.

[0112] As shown in Alt-5 in Table 2, the supported SCSs are 60kHz and 120kHz, enabling the same installation as FR2.

[0113] Table 3 shows an example of a combination of maximum channel bandwidth and SCS in NR.

[0114] [Table 3]

[0115] SCS[kHz] 15 30 60(FR1) 60(FR2) 120 #RBs 270 273 135 264 264 CBW[MHz] 50 100 100 200 400

[0116] Here, similarly to NR, when the number of FFT (Fast Fourier Transform) points is 4096, the maximum number of RBs is approximately 270.

[0117] As shown in Table 3, with an SCS of 15 kHz and a channel bandwidth of 50 MHz, the maximum number of RBs is 270. With an SCS of 30 kHz and a channel bandwidth of 100 MHz, the maximum number of RBs is 273. In FR1, with an SCS of 60 kHz and a channel bandwidth of 100 MHz, the maximum number of RBs is 135. In FR2, with an SCS of 60 kHz and a channel bandwidth of 200 MHz, the maximum number of RBs is 264. In FR2, with an SCS of 120 kHz and a channel bandwidth of 400 MHz, the maximum number of RBs is 264.

[0118] For example, in FR3, when the number of FFT points is set to 8192, the maximum number of RBs is approximately 540. Therefore, in FR3, the maximum channel bandwidth can be set to twice the value shown in Table 3. That is, it can be set to 100 MHz when the SCS is 15 kHz, 200 MHz when the SCS is 30 kHz, 200 MHz or 400 MHz when the SCS is 60 kHz, and 800 MHz when the SCS is 120 kHz.

[0119] In addition, in FR3, SCS can also be supported as shown in 1)-3) below.

[0120] 1) All SCS can be supported in the necessary manner.

[0121] 2) The number of SCSs supported in a necessary manner may be limited.

[0122] 3) Support for N SCSs in ascending order starting from the smallest SCS is set to be required, and N can be 1 or 2.

[0123] 4) Support for N SCSs in descending order starting from the maximum SCS is set to be required, and N can be 1 or 2.

[0124] In addition, the supported SCS can also be determined based on the maximum channel bandwidth supported.

[0125] For example, when the channel bandwidth is supported up to 50MHz, SCS15KHz can be supported.

[0126] For example, when the channel bandwidth supports up to 100 MHz, SCS 30 kHz can be supported.

[0127] For example, when the channel bandwidth supports up to 200 MHz, SCS 60 kHz can be supported.

[0128] In addition, the number of supported FFT points may also be determined by the maximum channel bandwidth.

[0129] Through the above-described embodiment, the terminal 20 can determine the radio frame structure such as the channel bandwidth, waveform, and subcarrier spacing according to the frequency band, and perform communication efficiently.

[0130] That is, in a wireless communication system, a wireless frame structure corresponding to a frequency band can be determined.

[0131] (Device Structure)

[0132] 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.

[0133] <Base Station 10>

[0134] Figure 4 FIG. 1 is a diagram showing an example of the functional configuration of the base station 10 according to the embodiment of the present invention. Figure 4 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 4 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.

[0135] The transmitter 110 includes the function of generating a signal to be sent to the terminal 20 and wirelessly transmitting the signal. Furthermore, the transmitter 110 transmits inter-network node messages to other network nodes. The receiver 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-layer information from the received signals. Furthermore, the transmitter 110 includes the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. Furthermore, the receiver 120 receives inter-network node messages from other network nodes.

[0136] The setting unit 130 stores pre-set setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information on the channel bandwidth, waveform, and / or subcarrier spacing.

[0137] The control unit 140 performs control to implement the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 140 performs control related to the channel bandwidth, waveform, and / or subcarrier spacing. The functional units related to signal transmission in the control unit 140 may be included in the transmitter 110, while the functional units related to signal reception in the control unit 140 may be included in the receiver 120.

[0138] <Terminal 20>

[0139] Figure 5 FIG. 1 is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention. Figure 5 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 5 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.

[0140] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains higher-layer signals from the received physical layer signals. In addition, the receiving unit 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, as D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0141] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. In addition, the setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, information related to the channel bandwidth, waveform, and / or subcarrier spacing.

[0142] The control unit 240 performs control to implement the functions described in the embodiments. Furthermore, as described in the embodiments, the control unit 240 performs control related to the channel bandwidth, waveform, and / or subcarrier spacing. The functional units related to signal transmission in the control unit 240 may be included in the transmitter 210, while the functional units related to signal reception in the control unit 240 may be included in the receiver 220.

[0143] (Hardware Structure)

[0144] The block diagram used in the description of the above embodiment ( Figure 4 and Figure 5 ) shows blocks in functional units. 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 using multiple devices by connecting two or more physically or logically separated devices directly or indirectly (for example, using wired or wireless connections). The functional blocks can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple devices.

[0145] Functions include, but are not limited to, judging, determining, 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 (component) that enables the transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0146] 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 6 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 may be configured as computer devices that physically include a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0147] 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.

[0148] The various functions in the base station 10 and the terminal 20 are implemented as follows: predetermined software (programs) are read 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.

[0149] 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.

[0150] 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 operations described in the above embodiments is used. For example, Figure 4 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. For example, Figure 5 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. Although the various processes described above are performed by a single processor 1001, the various processes described above can also be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be transmitted from the network via a telecommunications line.

[0151] 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.

[0152] 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 storage 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.

[0153] 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 also 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, transceiver antennas, amplifiers, transceivers, and transmission path interfaces may also be implemented using communication device 1004. The transceiver may also be implemented by physically or logically separating the transmitter and receiver.

[0154] 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).

[0155] 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 as a single bus or may be configured as different buses between devices.

[0156] 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.

[0157] Figure 7 2001 shows a structural example of a vehicle. Figure 7 As shown, 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. The various forms and embodiments described in this disclosure may also be applied to a communication device mounted on vehicle 2001, such as communication module 2013.

[0158] The driving unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel) and is configured to steer at least one of the front wheels and the rear wheels based on the user's operation of the steering wheel.

[0159] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals from various sensors 2021 to 2029 included in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be referred to as an ECU (Electronic Control Unit).

[0160] As signals from various sensors 2021 to 2029, there are current signals from the current sensor 2021 that monitors the current of the motor, speed signals of the front wheels or rear wheels obtained by the speed sensor 2022, air pressure signals of the front wheels or rear wheels obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression amount signals obtained by the accelerator pedal sensor 2029, brake pedal depression amount signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028, etc.

[0161] Information service unit 2012 is comprised of various devices, such as a car navigation system, audio system, speakers, television, and radio, that provide (output) various types of information, including driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices. Information service unit 2012 utilizes information obtained from external devices via communication module 2013 and other means to provide various multimedia information and services to passengers in vehicle 2001. Information service unit 2012 may include input devices (e.g., keyboard, mouse, microphone, switches, buttons, sensors, touch panel, etc.) for receiving external input, and output devices (e.g., display, speaker, LED light, touch panel, etc.) for providing external output.

[0162] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents or reducing the driver's driving load, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (such as GNSS), map information (such as high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyroscope systems (such as IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, AI processors, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 sends and receives various information via the communication module 2013 to implement driving assistance functions or autonomous driving functions.

[0163] 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 can transmit and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 29 via the communication port 2033.

[0164] The communication module 2013 is controlled by the microprocessor 2031 of the electronic control unit 2010 and is a communication device capable of communicating with external devices. For example, various information can be transmitted and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station or a mobile station.

[0165] The communication module 2013 may also transmit at least one of the signals input to the electronic control unit 2010 from the various sensors 2021-2028, information obtained based on the signals, and information based on external (user) input 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 also be referred to as an input unit that receives input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0166] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the information service unit 2012 of the vehicle 2001. The information service unit 2012 can also be referred to as an output unit that outputs information (for example, outputs information to a display, speaker, or other device based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH)). In addition, the communication module 2013 stores various information received from external devices in the memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, and the like of the vehicle 2001.

[0167] (Summary of Implementation Methods)

[0168] As described above, according to an embodiment of the present invention, there is provided a terminal comprising: a control unit that determines a modulation method and a subcarrier spacing supported in a specific frequency band; and a communication unit that uses the determined modulation method and the determined subcarrier spacing to communicate in the specific frequency band, wherein the control unit determines the supported modulation method and the supported combination of subcarrier spacings in each of the downlink and uplink.

[0169] With the above configuration, the terminal 20 can determine the radio frame structure such as the channel bandwidth, waveform, and subcarrier spacing according to the frequency band and perform communication efficiently. In other words, in the wireless communication system, the radio frame structure can be determined according to the frequency band.

[0170] The control unit may determine not to support CP-OFDM (Cyclic-Prefix Orthogonal Frequency Division Multiplexing) in the downlink or uplink. This configuration allows the terminal 20 to determine the radio frame structure, such as the channel bandwidth, waveform, and subcarrier spacing, based on the frequency band, and to communicate efficiently.

[0171] The control unit may also determine to support DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) in the downlink. This configuration allows the terminal 20 to determine the radio frame structure, including the channel bandwidth, waveform, and subcarrier spacing, based on the frequency band, and to communicate efficiently.

[0172] The control unit may determine three or two supported subcarrier spacings. With this configuration, the terminal 20 can determine a radio frame structure such as a channel bandwidth, a waveform, and a subcarrier spacing according to a frequency band, and perform communication efficiently.

[0173] The control unit may determine the supported subcarrier spacing based on the supported channel bandwidth. With this configuration, the terminal 20 can determine the radio frame structure such as the channel bandwidth, waveform, and subcarrier spacing according to the frequency band and perform communication efficiently.

[0174] In addition, according to an embodiment of the present invention, a communication method is provided, wherein a terminal performs the following steps: determining a modulation method and a subcarrier spacing supported in a specific frequency band; applying the determined modulation method and the determined subcarrier spacing to communicate in the specific frequency band; and determining the supported modulation method and a combination of the supported subcarrier spacing in the downlink and uplink, respectively.

[0175] With the above configuration, the terminal 20 can determine the radio frame structure such as the channel bandwidth, waveform, and subcarrier spacing according to the frequency band and perform communication efficiently. In other words, in the wireless communication system, the radio frame structure can be determined according to the frequency band.

[0176] (Supplementary Implementation Methods)

[0177] 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 items in the above description is not essential to the present invention. You can combine and use the matters recorded in two or more items as needed, and you can also apply the matters recorded in a certain item 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 steps described in the embodiment, the order of processing can be swapped if there is no contradiction. For the convenience of explaining the processing, the base station 10 and the terminal 20 are described using a functional block diagram, but such a device can also be implemented by hardware, software, or a combination thereof. The software that operates in accordance with the embodiments of the present invention through the processor of the base station 10 and the software that operates in accordance with the embodiments of the present invention through the processor of the terminal 20 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.

[0178] 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 can be implemented through physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (for example, 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 also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0179] Each form / embodiment described in the present disclosure can also be applied to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6G (6th generation mobile communication system), xG (xth generation mobile communication system) (xG (x is, for example, an integer or a decimal)), 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 At least one of 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems that are expanded, modified, created, or specified based on these systems. Furthermore, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G) may also be employed.

[0180] The processing steps, sequences, and flows of each form / implementation described in this specification may be rearranged in 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.

[0181] 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 for communication 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).

[0182] 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.

[0183] 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 rewritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0184] The determination in the present disclosure can be performed by a value represented by 1 bit (0 or 1), a Boolean value (Boolean: true or false), or a comparison of numerical values ​​(for example, comparison with a predetermined value).

[0185] 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.

[0186] Additionally, 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.

[0187] 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 also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0188] 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.

[0189] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0190] In addition, the information, parameters, etc. described in this disclosure can be expressed using absolute values, relative values ​​relative to predetermined values, or other corresponding information. For example, wireless resources can also be indicated using indexes.

[0191] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas and the like using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore the names assigned to these channels and information elements are non-limiting in any respect.

[0192] 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.

[0193] 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 (RRH) for indoor use). 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 that coverage area.

[0194] In the present disclosure, the base station sending information to the terminal may also be replaced by the base station instructing the terminal to perform a control / action based on the information.

[0195] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” can be used interchangeably.

[0196] 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.

[0197] 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 also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to an object that can move, and the moving speed is arbitrary. In addition, of course, the situation where the mobile body stops is also included. The mobile body includes, for example, vehicles, transport vehicles, cars, motorcycles, bicycles, connected cars, shovel cars, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon, and is not limited thereto. In addition, the mobile body may also be a mobile body that drives autonomously based on an operating instruction. It can be a vehicle (such as a car or airplane), a mobile object that moves unmanned (such as a drone or self-driving car), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0198] In addition, the base station in the present disclosure can also be replaced by a user terminal. For example, the various forms / implementations of the present disclosure can also be applied to 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) etc.). 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, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can also be replaced by side channels.

[0199] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal.

[0200] As used in this disclosure, terms such as "determining" and "determining" sometimes encompass a variety of actions. For example, "determining" and "judging" may include considering matters such as judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in a table, database, or other data structure), or ascertaining as matters that have been "judged" or "determined." Furthermore, "determining" and "receiving" (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, or accessing (e.g., accessing data in a memory) as matters that have been "judged" or "determined." Furthermore, "determining" and "resolving" may include matters such as selecting, choosing, establishing, or comparing. That is, "judgment" and "decision" can include matters where certain actions are considered to have been "judged" or "decided." In addition, "judgment (decision)" can also be replaced by "assuming (assuming)," "expecting (expecting)", "considering (considering)", etc.

[0201] 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 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". As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the wireless frequency domain, microwave region and light (including both visible and invisible) region may be used to "connect" or "couple" to each other.

[0202] 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.

[0203] The phrase “based on” used in this disclosure does not mean “based only on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0204] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. 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 manner.

[0205] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section,” “circuit,” “device,” or the like.

[0206] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," are intended to be inclusive. Furthermore, the term "or" used in this disclosure does not mean an exclusive or.

[0207] 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 also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) that is independent of the numerology.

[0208] 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, the 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can be called a TTI, and a slot or mini-slot 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 called a slot, a mini-slot, or the like, rather than a subframe.

[0213] 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 the allocation of wireless resources (such as the frequency bandwidth and transmit power available to each terminal 20) to each terminal 20 using TTIs as units. The definition of TTI is not limited to this.

[0214] 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 such as scheduling and link adaptation. Furthermore, when a TTI is given, 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.

[0215] In addition, when one time slot or one mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can also be controlled.

[0216] 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 also 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.

[0217] In addition, for long TTI (for example, normal TTI, subframe, etc.), it can be understood as a TTI with a time length of more than 1ms, and for short TTI (for example, shortened TTI, etc.), it can be understood as a TTI with a TTI length smaller than long TTI (long TTI) and greater than 1ms.

[0218] 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.

[0219] 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.

[0220] In addition, one or more RBs may also 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, etc.

[0221] 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.

[0222] A bandwidth part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can be identified by their index relative to the common reference point for that carrier. PRBs can be defined within a BWP and numbered within that BWP.

[0223] 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 one carrier.

[0224] 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".

[0225] 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, such as 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.

[0226] 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.

[0227] In this disclosure, the phrase "A and B are different" can mean "A and B are different from each other." Alternatively, the phrase can mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0228] 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).

[0229] 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.

[0230] Description of labels

[0231] 10 base stations

[0232] 110 Sending Department

[0233] 120 Receiving Department

[0234] 130 Setting Department

[0235] 140 Control Department

[0236] 20 Terminal

[0237] 210 Sending Department

[0238] 220 Receiving Department

[0239] 230 Setting Department

[0240] 240 Control Department

[0241] 30 Power transmission equipment

[0242] 40 Core Network

[0243] 1001 Processor

[0244] 1002 Storage Device

[0245] 1003 Auxiliary storage device

[0246] 1004 Communication device

[0247] 1005 Input Device

[0248] 1006 Output Device

[0249] 2001 Vehicle

[0250] 2002 Drive Department

[0251] 2003 Steering

[0252] 2004 Accelerator Pedal

[0253] 2005 Brake Pedal

[0254] 2006 gear lever

[0255] 2007 front wheel

[0256] 2008 rear wheel

[0257] 2009 Axle

[0258] 2010 Electronic Control Department

[0259] 2012 Information Services Department

[0260] 2013 Communication Module

[0261] 2021 Current Sensor

[0262] 2022 Speed ​​Sensor

[0263] 2023 Air Pressure Sensor

[0264] 2024 Vehicle Speed ​​Sensor

[0265] 2025 Accelerometer

[0266] 2026 Brake Pedal Sensor

[0267] 2027 Gearshift sensor

[0268] 2028 Object Detection Sensor

[0269] 2029 Accelerator pedal sensor

[0270] 2030 Driving Assistance Systems Department

[0271] 2031 Microprocessor

[0272] 2032 memory (ROM, RAM)

[0273] 2033 Communication port (IO port)

Claims

1. A terminal comprising: a control unit that determines a modulation scheme and a subcarrier spacing supported in a specific frequency band; and a communication unit for performing communication in the specific frequency band using the determined modulation method and subcarrier spacing, The control unit determines the modulation scheme supported in each of downlink and uplink, and determines a combination of the subcarrier spacing supported.

2. The terminal according to claim 1, wherein: The control unit determines that cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) is not supported in the downlink or uplink.

3. The terminal according to claim 1, wherein: The control unit decides to support Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) in the downlink. The terminal according to claim 1 , wherein: The control unit determines three or two supported subcarrier spacings. The terminal according to claim 1 , wherein: The control unit determines the supported subcarrier spacing based on the supported channel bandwidth.

6. A communication method, wherein: The terminal performs the following steps: Determine the modulation schemes and subcarrier spacing supported in a specific frequency band; Applying the determined modulation scheme and subcarrier spacing to communicate in the specific frequency band; as well as The supported modulation schemes are determined in the downlink and uplink, respectively, and the supported combinations of subcarrier spacings are determined.

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