Terminal, wireless communication method and system

Abstract

A terminal according to one aspect of the present disclosure is characterized by comprising: a reception unit which receives a setting indicating that a physical uplink shared channel (PUSCH) waveform can be dynamically switched and receives downlink control information (DCI) and a media access control control element (MAC CE); and a control unit which dynamically switches the wave form of the PUSCH of a specific type on the basis of at least one of the DCI and the MAC CE. According to one aspect of the present disclosure, the switching of the waveform can appropriately be carried out.

Description

Terminal, wireless communication method and base station

[0001] The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In future wireless communication systems, support for a multi-carrier waveform, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM), in addition to a single-carrier waveform, Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM), is being considered.

[0006] However, since conventional waveform configuration is performed by Radio Resource Control (RRC), switching waveforms requires reconfiguration of the RRC, which increases signaling overhead and may reduce communication throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately switch waveforms.

[0008] A terminal according to one aspect of the present disclosure includes: a receiving unit that receives a setting indicating that a physical uplink shared channel (PUSCH) waveform can be dynamically switched, and receives downlink control information (DCI) and a media access control element (MAC CE); and a control unit that dynamically switches a waveform of a specific type of PUSCH based on at least one of the DCI and the MAC CE.

[0009] According to one aspect of the present disclosure, waveform switching can be performed appropriately.

[0010] FIG. 1 is a diagram showing the DCI size of option 1-1. FIG. 2 is a diagram showing the DCI size of option 1-2. FIG. 3 is a flowchart showing an example of processing according to embodiment 0.1. FIG. 4 is a flowchart showing an example of processing according to embodiment 0.2. FIG. 5 is a diagram showing definitions of PTRS-DMRS association and DMRS sequence initialization in the DCI field. FIG. 6 is a diagram showing example configuration patterns of useInterlacePUCCH-PUSCH, resourceAllocation, and RA type. FIG. 7 is a flowchart showing an example of processing according to embodiment 3. FIG. 8 is a diagram showing an example of a MAC payload. FIG. 9 is a diagram showing an example of the number of bits in an RAR grant field. FIG. 10 is a diagram showing example values ​​of a TPC command. FIG. 11 is a diagram showing example backoff parameter values. FIG. 12 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 13 is a diagram showing an example of the configuration of a base station according to an embodiment. FIG. 14 is a diagram showing an example of the configuration of a user terminal according to an embodiment. FIG. 15 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 16 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (CP-OFDM and DFT-s-OFDM) In the uplink (UL) of a wireless communication system (for example, NR), in addition to a multi-carrier waveform, a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform, a single-carrier waveform, a Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform is supported. In this disclosure, "waveform" refers to at least one of a CP-OFDM waveform (a CP-OFDM-based waveform) and a DFT-s-OFDM waveform (a DFT-s-OFDM-based waveform).

[0012] CP-OFDM allows for more flexible frequency resource allocation. For example, both contiguous and non-contiguous Physical Resource Block (PRB) allocation is allowed. Furthermore, contiguous PRB allocation is not limited to multiples of 2, 3, or 5. When CP-OFDM is applied, frequency division multiplexing (FDM) may be used for the demodulation reference signal (DMRS) and the PUSCH.

[0013] DFT-s-OFDM has high frequency resource allocation constraints, but has a low Peak to Average Power Ratio (PAPR), making it suitable for power-limited UEs.

[0014] In addition, with regard to communication throughput without considering PAPR, CP-OFDM has a higher communication throughput than DFT-s-OFDM. With regard to communication throughput with PAPR taken into consideration, when the SNR (MCS) is high (the modulation and coding method is 16QAM or 64QAM), the communication throughput of CP-OFDM is higher than that of DFT-s-OFDM, but when the SNR (MCS) is low (the modulation and coding method is QPSK), the communication throughput of DFT-s-OFDM is higher than that of CP-OFDM. In other words, the preferred waveform differs depending on the SNR (MCS).

[0015] Typically, the network (NW) switches waveforms based on the signal-to-noise ratio (SNR). Switching between DFT-s-OFDM and CP-OFDM is performed by the transform precoder "transformPrecoder" in the uplink shared channel (Physical Uplink Shared Channel (PUSCH) configuration (PUSCH-Config) of Radio Resource Control (RRC) signaling. When the transform precoder is disabled, CP-OFDM is applied, and when it is enabled, DFT-s-OFDM is applied. Waveform switching requires RRC reconfiguration, which may increase signaling overhead and reduce communication throughput.

[0016] For more flexible throughput control, it is conceivable to dynamically switch between CP-OFDM and DFT-s-OFDM using DCI / MAC CE, but such dynamic switching has not yet been studied.

[0017] For example, in existing specifications (e.g., 3GPP Rel. 16), the sizes of some DCI fields in DCI formats (e.g., DCI formats 0_0 / 0_1 / 0_2) are affected by waveform switching, as shown in the following (1) to (6): (1) In the "Precoding information and number of layers" field, different tables are used for the two waveforms. (2) In the "Antenna ports" field, different tables are used for the two waveforms. (3) In the "DMRS sequence initialization" field, a 0 bit is set when the transform precoder is enabled, and a 1 bit is set when the transform precoder is disabled. (4) In the "PTRS-DMRS association" field, the DCI size is affected by the transform precoder. (5) In the "Frequency domain resource assignment," the DCI size varies depending on the resource allocation type. Also, different waveforms support different resource allocations. CP-OFDM supports resource allocation types 0, 1, and 2, while DFT-s-OFDM supports resource allocation types 1 and 2. (6) In the "Frequency hopping flag" field, the DCI size varies depending on the resource allocation type. As described above, different waveforms support different resource allocations.

[0018] (Dynamic Switching Between Disabling and Activating a Transform Precoder) The UE may receive a configuration indicating dynamic switching between disabling and enabling of a transform precoder for a PUSCH via DCI / MAC CE. Then, the UE may receive an instruction indicating activation or deactivation of a transform precoder for a PUSCH via DCI / MAC CE. Hereinafter, dynamic switching via DCI / MAC CE may be simply referred to as dynamic switching. Note that the UE may be configured in advance via higher layer signaling or the like to dynamically switch (be able to switch) the waveform / transform precoder. Regardless of whether or not such a configuration is present, dynamic switching of the transform precoder via DCI / MAC CE may be possible.

[0019] For example, DCI signaling-based dynamic waveform switching may be performed implicitly or explicitly. For example, a one-bit field indicating the CP-OFDM or DFT-s-OFDM waveform to be used for the PUSCH may be included in the DCI (explicit signaling). For example, the UE may determine / identify the CP-OFDM or DFT-s-OFDM waveform to be used for the PUSCH depending on specific conditions, such as scheduling information, in the DCI (implicit signaling). In this case, the existing DCI format remains unchanged.

[0020] Alternatively, dynamic UL waveform switching based on MAC CE signaling may be performed. For example, a one-bit field indicating the CP-OFDM or DFT-s-OFDM waveform used for PUSCH may be included in the MAC CE (explicit signaling), or the UE may determine / identify the CP-OFDM or DFT-s-OFDM waveform used for PUSCH based on an existing field in the MAC CE (implicit signaling).

[0021] The DCI format in the present disclosure may indicate, for example, DCI format 0_0 / 0_1 / 0_2, or may be another format (for example, DCI format 0_3 for notifying waveform switching). As another format, for example, a group-wide DCI such as DCI format 2_x may be used. In this case, waveform switching may be applied a certain time after the UE receives DCI format 2_x and transmits an ACK.

[0022] In the present disclosure, the switching between disabling and enabling the transform precoder (waveform switching) may be waveform switching within the same BWP (waveform switching without switching the BWP). For example, since a different transform precoder can be set for each BWP, it is conceivable to switch the transform precoder by BWP switching. However, since a delay occurs due to the BWP switching, the delay can be suppressed by switching between disabling and enabling the transform precoder within the same BWP.

[0023] When the DCI / MAC CE is configured to dynamically switch between disabling and enabling the transform precoder for the PUSCH, the UE may receive an instruction indicating the enabling or disabling of the transform precoder for the PUSCH via the DCI / MAC CE, and may switch the waveform (CP-OFDM / DFT-s-OFDM) used for the PUSCH based on the instruction.

[0024] The total DCI size of the DCI format may be constant regardless of whether the transform precoder is disabled or enabled. The size of the DCI format may be configured / determined by higher layer signaling (RRC). That is, the size of the DCI format may not depend on the DCI / MAC CE.

[0025] However, the size of some DCI fields may differ depending on whether a transform precoder is disabled or enabled. Examples of such DCI fields include "Precoding information and number of layers," "Antenna ports," "DMRS sequence initialization," "PTRS-DMRS association," "Frequency resource assignment," and "Frequency hopping flag." For example, the DCI sizes may differ as shown in (1) to (6) of the existing specifications.

[0026] [Option 1-1] When dynamic switching of transform precoder for PUSCH (switching by DCI / MAC CE) is configured for PUSCH, for each DCI format, the total size of the DCI format may be the larger of the size of each DCI format when the transform precoder is disabled and the size of each DCI format when the transform precoder is enabled.

[0027] If the transform precoder is disabled / enabled by the MAC CE, the UE may read each DCI field starting from the least significant bit (LSB) or most significant bit (MSB), depending on the size of each DCI field.

[0028] Fig. 1 is a diagram showing the DCI size of Option 1-1. According to Fig. 1, the number of DCI bits (total of DCIFields #1 to #4) when the transform precoder is disabled is 10 bits, and the number of DCI bits when the transform precoder is enabled is 7 bits. In this case, the larger DCI size of 10 bits is used as the total DCI size when dynamic switching of the transform precoder is set.

[0029] In Figure 1, the smaller DCI bits (DCI bits when the transform precoder is enabled) are mapped from the left (least significant bit) but may also be mapped from the right (most significant bit), i.e. the UE may read each DCI field from the least significant bit or from the most significant bit.

[0030] Option 1-1 allows the total DCI size to be reduced compared to Option 1-2 described below.

[0031] [Option 1-2] When dynamic switching of transform precoder for PUSCH is configured for PUSCH, for each DCI format, the larger of the size of the DCI field when the transform precoder is disabled and the size of the DCI field when the transform precoder is enabled is determined for each field, and the total size of the DCI format may be the sum of the larger sizes of all DCI fields.

[0032] That is, when the number of fields in a certain DCI format is N, the total size of the DCI format is calculated as follows: Total size of DCI format = Σ (MAX (size of DCI field i when transform precoder is disabled, size of DCI field i when transform precoder is enabled)) (i = 1 to N).

[0033] If the transform precoder is disabled / enabled by the MAC CE, the UE may read each DCI field starting from the least significant bit (LSB) or the most significant bit (MSB), depending on the size of each DCI field.

[0034] Figure 2 shows the DCI size for Option 1-2. According to Figure 2, in DCI Field #1, the larger of the DCI field size when the transform precoder is disabled (2 bits) and the DCI field size when the transform precoder is enabled (1 bit) is 2 bits. Similarly, the larger size is 3 bits for DCI Field #2, 2 bits for DCI Field #3, and 4 bits for DCI Field #4. By adding these sizes together (2 + 3 + 2 + 4 = 11), a total DCI size of 11 bits is used when dynamic transform precoder switching is configured.

[0035] In Figure 2, in each field, the smaller DCI bits are mapped from the left (least significant bit) to the right (most significant bit) to the left, but they may also be mapped from the right (most significant bit) to the left, i.e., the UE may read each DCI field from the least significant bit or from the most significant bit.

[0036] In the example of Figure 2, the starting bit of each field (the bit range used for each field) is the same whether the transform precoder is enabled or disabled. For example, DCI Field #1 starts at the first bit, DCI Field #2 starts at the third bit, DCI Field #3 starts at the sixth bit, and DCI Field #4 starts at the eighth bit. This facilitates the UE's detection of each field.

[0037] In option 1-2, even if the transform precoder is switched between enabled and disabled, the detected DCI size remains the same, so the increase in the processing load on the UE can be suppressed.

[0038] (FDRA Types) In NR, three types of Frequency Domain Resource Allocation (FDRA) are supported: Type 0, Type 1, and Type 2. Type 0: Allocation based on a bitmap (i.e., may be non-contiguous). Type 1: Contiguous allocation based on a Resource Indication Value (RIV). Type 2: Interlaced arrangement (for NR).

[0039] The applicability of each type, which depends on the PUSCH waveform, is supported as follows: Type 0: Applicable to CP-OFDM only. Type 1: Applicable to both CP-OFDM and DFTS-OFDM. Type 2: Applicable to both CP-OFDM and DFTS-OFDM.

[0040] If the RRC parameter useInterlacePUCCH-PUSCH is not configured, Type 0 or Type 1 is used according to the RRC parameter resourceAllocation. When Type 1 UL data is transmitted without a grant, resourceAllocation is set to resourceAllocationType0 or resourceAllocationType1. If resourceAllocationType0 is set, Type 0 is used, and if resourceAllocationType1 is set, Type 1 is used. If dynamicSwitch is set, Type 0 or Type 1 is indicated by the scheduling DCI (MSB of FDRA). If useInterlacePUCCH-PUSCH is set, Type 2 is used.

[0041] (Analysis) Conventionally, waveform configuration was performed by Radio Resource Control (RRC), so RRC reconfiguration was required to switch waveforms. This increases signaling overhead and may reduce communication throughput. Therefore, as described above, dynamic switching of the conversion precoder for PUSCH (switching by DCI / MAC CE) can easily (fastly) switch waveforms. However, in this case, various settings / controls are not clearly defined, as shown in the following problems 0 to 3.

[0042] Therefore, the present inventors came up with the idea of ​​a terminal that appropriately and dynamically switches between disabling and enabling a transform precoder for PUSCH (switching of waveforms).

[0043] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0044] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0045] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0046] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0047] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0048] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0049] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0050] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0051] In the present disclosure, the application / use of CP-OFDM and the disablement (disablement) of the transform precoder may be interchangeable. The application / use of DFT-s-OFDM and the enablement (enablement) of the transform precoder may be interchangeable. The disablement / enablement of the transform precoder, the switching of the transform precoder, and the switching of the waveform (CP-OFDM / DFT-s-OFDM) may be interchangeable. The PUSCH waveform, waveform, and transform precoder may be interchangeable. The CP-OFDM and CP-OFDM waveform may be interchangeable. The DFT-s-OFDM and DFT-s-OFDM waveform may be interchangeable. Enabled and on may be interchangeable. Disabled and off may be interchangeable. "When it is possible to dynamically switch the PUSCH waveform" and "When it is configured to dynamically switch the PUSCH waveform" may be read interchangeably.

[0052] (Wireless Communication Method) As described above, the UE may receive a configuration indicating dynamic switching between disabling and enabling of a transform precoder for a PUSCH via a DCI / MAC CE. Then, the UE may receive an instruction indicating enabling or disabling of the transform precoder for a PUSCH via the DCI / MAC CE. That is, the UE may be able to dynamically switch the PUSCH waveform. In this case, at least one of the processes of several embodiments below may be applied.

[0053] In the present disclosure, if the PUSCH waveform can be dynamically switched, at least one of the methods described above (dynamically switching between disabling and enabling the transform precoder) may be applied.

[0054] <Problem 0> When the PUSCH waveform can be dynamically switched, it is not clear what values ​​are set to the RRC parameters transformPrecoder and maxRank. For example, transformPrecoder is expected to have a value corresponding to either enabled (i.e., DFT-s-OFDM), disabled (i.e., CP-OFDM), or no restriction. For example, the setting of the RRC parameter transformPrecoder affects the DCI size, which in turn affects the UE processing load and communication overhead, so it is preferable to clarify this.

[0055] <Embodiment 0.1> When a UE is capable of dynamically switching the PUSCH waveform, any of the following configurations may be applied to an RRC parameter transform precoder (transformPrecoder).

[0056] [Aspect 1] When the PUSCH waveform can be dynamically switched, the RRC parameter transformPrecoder may be set to enabled. This reduces the DCI size assumed by the UE. That is, the NW (base station, gNB) can set the DCI size to be small, thereby suppressing communication overhead.

[0057] [Aspect 2] When the PUSCH waveform can be dynamically switched, the RRC parameter transformPrecoder may be set to disabled. As a result, even if the PUSCH waveform is switched to DFT-s-OFDM, the UE assumes the same DCI size as CP-OFDM, thereby reducing the processing load on the UE.

[0058] [Aspect 3] When the PUSCH waveform can be dynamically switched, the RRC parameter transformPrecoder may be ignored, that is, there may be no restriction on transformPrecoder.

[0059] 3 is a flowchart illustrating an example of processing in embodiment 0.1. When the UE receives a setting indicating that dynamic switching of the PUSCH waveform is possible (step S101), the UE receives an RRC parameter transformPrecoder in which enabled / disabled is set (step S102).

[0060] There are multiple transformPrecoders as RRC parameters, but the transformPrecoder referenced by the UE may differ for each case (each timing). For example, the following options 1 and 2 may be applied. When dynamic switching of the PUSCH waveform is configured, the processing of the following options 1 and 2 may be applied at a timing before an instruction to dynamically switch the PUSCH waveform is issued.

[0061] [Option 1] The UE may refer to / consider the transformPrecoder in the RRC IE (e.g., PUSCH-Config or ConfiguredGrantConfig) corresponding to the PUSCH to be transmitted. This option may be applied to the UE after dedicated (UE-specific) RRC configuration.

[0062] [Option 2] The UE may refer to / consider the transformPrecoder in a specific RRC IE (e.g., msg3-transformPrecoder in RACH-ConfigCommon) regardless of the PUSCH type. This option may be applied to the UE before dedicated (UE-specific) RRC configuration.

[0063] According to the present embodiment, it is possible to clarify the value to be set and the operation of the UE for the RRC parameter transformPrecoder when it is possible to dynamically switch the PUSCH waveform.

[0064] <Embodiment 0.2> When a UE can dynamically switch PUSCH waveforms, the UE may receive a value / setting based on any of the following aspects / options as the maximum rank (maxRank) of an RRC parameter. That is, the UE may assume application of any of the following aspects / options for the value / setting of maxRank. maxRank is a parameter indicating the maximum value of the transmission rank (layer) of UL (PUSCH). The UE controls the transmission of PUSCH based on maxRank.

[0065] [Aspect 1] There may be no restrictions on the setting of maxRank. In other words, even if dynamic switching of PUSCH waveforms is configured, any value may be set to maxRank.

[0066] [Aspect 2] maxRank may be set to a specific value or a value smaller than a specific value. The specific value may be determined (fixed) by specifications, for example. Alternatively, the specific value may be set / indicated by RRC / MAC CE / DCI. For example, when dynamic switching of PUSCH waveforms is configured, maxRank (specific value) may be 1.

[0067] When maxRank is limited, for example, if maxRank can only be set to 1, the bit width of the Transmitted Precoding Matrix Indicator (TPMI) is the same regardless of the waveform of the PUSCH. In other words, the DCI size is the same, so the processing load of the UE can be reduced.

[0068] Fig. 4 is a flowchart showing an example of processing in embodiment 0.2. Fig. 4 shows an example of the above aspect 2. When the UE receives a configuration indicating that dynamic switching of the PUSCH waveform is possible (step S201), the UE receives a configuration indicating a specific value or a value smaller than the specific value as the value of the RRC parameter maxRank (step S202).

[0069] According to this embodiment, it is possible to clarify the value to be set for the RRC parameter maxRank when it is possible to dynamically switch the PUSCH waveform.

[0070] <Problem 1> When the PUSCH waveform can be dynamically switched, it is unclear how to handle DCI fields that may be present (1 bit or more) or absent (0 bit) depending on the PUSCH waveform. Such DCI fields include, for example, PTRS-DMRS association and DMRS sequence initialization.

[0071] 5 is a diagram showing the definition of the PTRS-DMRS association and DMRS sequence initialization of the DCI field. As shown in FIG. 5, DMRS sequence initialization is 0 bit when PTRS (PTRS-UplinkConfig) is not configured and CP-OFDM is applied (transform precoder is disabled), when DFTS-OFDM is applied (if transform precoder is enabled), or maxRank = 1, otherwise it is 2 bits. DMRS sequence initialization is 0 bit when DFTS-OFDM is applied, and 1 bit when CP-OFDM is applied.

[0072] <First embodiment> When the PUSCH waveform is dynamically switchable and a specific waveform is instructed for the PUSCH, the UE may process (assume) a specific field of the scheduling DCI for the PUSCH based on a specific rule.

[0073] The specific field of the DCI may be at least one of a Demodulation Reference Signal (DMRS) sequence initialization field, a Phase Tracking Reference Signal (PTRS)-DMRS association field.

[0074] A particular rule may be that the UE ignores certain fields of the DCI.

[0075] The particular waveform may be DFT-s-OFDM or CP-OFDM.

[0076] For example, if a UE receives a DCI in which the PUSH waveform is dynamically switchable and DFT-s-OFDM is indicated for the PUSH, the UE ignores at least one of the DMRS sequence initialization field and the PTRS-DMRS association field of the DCI.

[0077] Without being limited to the above example, if the condition that the DMRS sequence initialization field or the PTRS-DMRS association field in Fig. 5 is 0 is satisfied, the UE may ignore that field, thereby reducing the processing load on the UE.

[0078] In the first embodiment, when the PUSCH waveform is dynamically switched, regardless of the exact waveform used by the UE, the number of bits in each DCI field / total DCI size may follow the rules for CP-OFDM, or the number of bits in each DCI field / total DCI size may not follow the rules for CP-OFDM.

[0079] <Problem 2> As explained above (FDRA type), Type 0 RA cannot be used for DFT-s-OFDM, so when the PUSCH waveform is switched to DFT-s-OFDM, Type 1 or Type 2 must be used. For example, it is preferable that the RRC parameters indicating the PUSCH waveform always correspond to the setting / instruction of the FDRA type. However, when the PUSCH waveform is dynamically switched, the setting of FDRA and the interlace use instruction (useInterlacePUCCH-PUSCH) is not clear.

[0080] <Second embodiment> When the PUSCH waveform is dynamically switchable and a specific waveform is instructed for the PUSCH, the UE may receive specific fields of DCI and specific RRC parameters corresponding to scheduling of the PUSCH based on a specific rule (reception of the specific fields of the DCI and the specific RRC parameters may be assumed). The UE may control PUSCH transmission based on the specific fields of the received DCI and the specific RRC parameters.

[0081] The particular field of the DCI may be the FDRA or frequency hopping flag.

[0082] The specific RRC parameter may be resource allocation (resourceAllocation) or interlace usage indication for PUCCH and PUSCH (useInterlacePUCCH-PUSCH).

[0083] The particular waveform may be DFT-s-OFDM or CP-OFDM.

[0084] A specific rule may be that resourceAllocation is either resourceAllocationType1 or dynamicSwitch. If resourceAllocation is dynamicSwitch, the most significant bit (MSB) of FDRA must be "1". That is, type 1 of FDRA must be indicated. This specific rule may be applied when useInterlacePUCCH-PUSCH is not configured.

[0085] A specific rule may be that resourceAllocation is of resourceAllocationType1.

[0086] The specific rule may be that the frequency hopping flag is determined according to at least one of resourceAllocation and FDRA based on the specific rule.

[0087] The specific rule may be that useInterlacePUCCH-PUSCH (use of interlace for PUCCH and PUSCH) is set to enabled (use of interlace for PUCCH and PUSCH).

[0088] [Specific Example] For example, when the PUSCH waveform is dynamically switchable and DFT-s-OFDM is instructed for the PUSCH, the UE may receive (or may assume reception of) configuration information (RRC parameters) indicating dynamic switching (dynamicSwitch) as resourceAllocation and instruction information (DCI) indicating Type 1 as FDRA. The UE may control PUSCH transmission based on the configuration information and instruction information.

[0089] For example, when the PUSCH waveform is dynamically switchable and DFT-s-OFDM is instructed for the PUSCH, the UE may receive (or may assume to receive) configuration information (RRC parameters) indicating type 1 (resourceAllocationType1) as resourceAllocation. The UE may control PUSCH transmission based on the configuration information.

[0090] For example, the UE may receive (or may assume reception of) configuration information indicating that useInterlacePUCCH-PUSCH (use of interlace for PUCCH and PUSCH) is enabled when the PUSCH waveform is dynamically switchable and DFT-s-OFDM is indicated for PUSCH. The UE may control PUSCH transmission based on the configuration information.

[0091] 6 is a diagram showing example configuration patterns of useInterlacePUCCH-PUSCH, resourceAllocation, and RA type. When dynamic waveform switching is possible, the following (1) and (2) may be applied to the configuration patterns shown in FIG. 6. (1) When the default value of transformPrecoder is disabled (CP-OFDM is indicated / used), the UE can expect any pattern, but when it is enabled (DFT-s-OFDM is indicated / used), patterns 1-1 and 1-3 may not be applicable. (2) When the default value of transformPrecoder is enabled, the UE can expect patterns other than patterns 1-1 and 1-3 that apply DCI indicating type 0, but when CP-OFDM is indicated / used, any pattern may be expected.

[0092] The process of this embodiment may be applied regardless of the waveform specified for the PUSCH. That is, when the PUSCH waveform is dynamically switchable, the UE may control the specific fields of the DCI corresponding to the scheduling of the PUSCH and the specific RRC parameters based on the specific rules.

[0093] According to this embodiment, even when the PUSH waveform is dynamically switched, it is possible to avoid cases in which an error occurs (for example, when DFT-s-OFDM is applied, FDRA of type 0 is set).

[0094] <Problem 3> When the PUSCH waveform can be dynamically switched, the type of PUSCH that can be applied is not clear. For example, it is not clear whether message 3 (Msg3) / message A (msg3-TransformPrecoder / msgA-TransformPrecoder) can be applied as the PUSCH. Also, it is not clear whether CG-PUSCH (transformPrecoder of ConfiguredGrantConfig) can be applied as the PUSCH. Furthermore, when dynamic switching of the PUSCH waveform is supported for these PUSCHs, it is not clear what processing is performed.

[0095] <Embodiment 3> The UE may apply dynamic switching of PUSCH waveforms only to a specific type of PUSCH. That is, when the UE receives a configuration indicating dynamic switching of PUSCH waveforms, the UE may control dynamic switching of only the specific type of PUSCH based on DCI / MAC CE. The specific type of PUSCH may be, for example, at least one of (1) to (4) below.

[0096] (1) DCI Grant (DG)-PUSCH (PUSCH scheduled by DCI); (2) Type 1 Configured Grant (CG)-PUSCH (PUSCH transmission configured by higher layer signaling); (3) Type 2 CG-PUSCH (PUSCH transmission configured by higher layer signaling and activated / deactivated by DCI); (4) Random Access Response (RAR)-scheduled PUSCH (Message 3 PUSCH or Message A PUSCH). This RAR can be a contention-based random access (CBRA) RAR or a contention-free random access (CFRA) RAR. For example, in CFRA, the base station (gNB) knows the UE and its channel conditions and can adjust the waveform appropriately.

[0097] 7 is a flowchart illustrating an example of processing in embodiment 3. When the UE receives a setting indicating that dynamic switching of the PUSCH waveform is possible (step S301), the UE controls so that only the waveform of a specific type of PUSCH is dynamically switched based on the DCI / MAC CE (step S302).

[0098] <Embodiment 4.1> Dynamic switching of the waveform of Type 1 CG-PUSCH (PUSCH transmission configured by higher layer signaling) may be applied, and at least one of the following methods (1-1) to (1-4) may be supported. As a specific method of the following methods (1-1) to (1-4), the above-mentioned method (dynamic switching of disabling and enabling of transform precoder) may be applied.

[0099] (1-1) The UE may receive an explicit indication by a DCI indicating whether transformPrecoder is enabled / disabled (DFT-s-OFDM / CP-OFDM) (explicit signaling). (1-2) The UE may receive an implicit indication by a DCI indicating whether transformPrecoder is enabled / disabled (DFT-s-OFDM / CP-OFDM) (implicit signaling). (1-3) The UE may receive an explicit indication by a MAC CE indicating whether transformPrecoder is enabled / disabled (DFT-s-OFDM / CP-OFDM) (explicit signaling). (1-4) The UE may receive an implicit indication by a MAC CE indicating whether transformPrecoder is enabled / disabled (DFT-s-OFDM / CP-OFDM) (implicit signaling).

[0100] The methods (1-1) to (1-4) may be applied to the CG-PUSCH of type 1 separately from other types of PUSCH (CG-PUSCH of type 2, DG-PUSCH). Alternatively, as methods (1-1) to (1-4), the same methods as the methods for other types of PUSCH may be applied to the CG-PUSCH of type 1.

[0101] In the conventional type 1 CG-PUSCH, DCI is not used for scheduling. Therefore, when the above (1-1) and (1-2) are applied, it is preferable to newly define DCI. For example, either of the following (2-1) or (2-2) may be applied as the DCI of the above (1-1) and (1-2).

[0102] (2-1) A DCI for scheduling UL / DL unicast data may be applied. Note that the UL / DL-SCH that the DCI actually schedules may not actually exist. (2-2) A DCI for scheduling data other than unicast data may be applied. For example, this DCI may be applied when a group-common DCI is used.

[0103] According to this embodiment, it is possible to clarify the processing when dynamic switching of Type 1 CG-PUSCH waveform is applied.

[0104] <Embodiment 4.2> Dynamic switching of Type 2 CG-PUSCH (PUSCH transmission configured by higher layer signaling and activated / deactivated by DCI) waveform may be applied, and at least one of the methods (1-1) to (1-4) of embodiment 4.1 may be supported.

[0105] The methods (1-1) to (1-4) may be applied to the type 2 CG-PUSCH separately from other types of PUSCH (type 1 CG-PUSCH, DG-PUSCH). Alternatively, as methods (1-1) to (1-4), the same methods as the methods for other types of PUSCH may be applied to the type 2 CG-PUSCH.

[0106] Since DCI for activation / deactivation is used in conventional type 2 CG-PUSCH, that DCI may be reused. Specifically, either of the following (2-1) or (2-2) may be applied as the DCI of the above (1-1) or (1-2).

[0107] (2-1) A DCI for scheduling UL / DL unicast data may be applied. Note that the UL / DL-SCH that the DCI actually schedules may not exist. For example, a DCI for activating / deactivating a Type 2 CG-PUSCH may be applied. (2-2) A DCI for scheduling data other than unicast data may be applied. For example, this DCI may be applied when a group-common DCI is used.

[0108] According to this embodiment, it is possible to clarify the processing when dynamic switching of Type 2 CG-PUSCH waveform is applied.

[0109] <Embodiment 5> Dynamic switching of the waveform of the message 3 / message A PUSCH (PUSCH scheduled by a random access response (RAR)) may be applied, and at least one of the methods (1-1) to (1-4) of embodiment 4.1 may be supported. Alternatively, the following (1-5) may be applied.

[0110] (1-5) The UE may receive an explicit / implicit indication via the RAR indicating whether transformPrecoder is enabled / disabled (DFT-s-OFDM / CP-OFDM).

[0111] The methods (1-1) to (1-5) may be applied to the message 3 / message A PUSCH separately from other types of PUSCH (type 1 / type 2 CG-PUSCH, DG-PUSCH). Alternatively, as methods (1-1) to (1-5), the same methods as the methods for other types of PUSCH may be applied to the message 3 / message A PUSCH.

[0112] Since DCI for activation / deactivation is used in the conventional message 3 / message A PUSCH, that DCI may be reused. Specifically, either of the following (2-1) or (2-2) may be applied as the DCI of the above (1-1) or (1-2).

[0113] (2-1) A DCI for scheduling UL / DL unicast data may be applied. Note that the UL / DL-SCH that the DCI actually schedules may not exist. For example, the DCI may be DCI 1_0 having a cyclic redundancy check (CRC) scrambled by an RA Radio Network Temporary Identifier (RNTI) or a message B RNTI. (2-2) A DCI for scheduling data other than unicast data may be applied. For example, this DCI may be applied when a group-common DCI is used.

[0114] For dynamic waveform switching of the Message 3 / Message A PUSCH, the UE may support at least one of the following (3-1) and (3-2) regarding RAR-based instructions: The UE may dynamically switch the waveform of the Message 3 PUSCH or the Message A PUSCH based on at least one of the MAC subheader or the MAC payload for the RAR.

[0115] (3-1) The reserved bit (R) in the MAC subheader / MAC payload for RAR may be cleared and used for dynamic waveform switching. For example, the "R" in the first octet of the MAC payload (i.e., next to the Timing Advance Command) shown in Figure 8 may indicate dynamic waveform switching.

[0116] (3-2) The RAR grant field may be implicitly indicated based on the existing RAR grant field (UL Grant) shown in Fig. 9. For example, when the Modulation and Coding Scheme (MCS) in the UL Grant indicates a specific MCS, the enable / disable of the transformPrecoder may be set for the Message 3 / Message A PUSCH. For example, when a value corresponding to the TPC command for the Message 3 PUSCH in the UL Grant (Figs. 9 and 10) is a specific value or is greater than / less than a specific threshold, the enable / disable of the transformPrecoder may be set for the Message 3 / Message A PUSCH.

[0117] When a Backoff Parameter value (FIG. 11) corresponding to a Backoff Indicator (BI) field included in the MAC subheader for RAR is a specific value or is greater than / less than a specific threshold, the enable / disable of the transformPrecoder may be set for the message 3 / message A PUSCH. Alternatively, when the Extension (E) field, Type (T) field, and Random Access Preamble IDentifier (RAPID) field included in the MAC subheader for RAR are specific values, the enable / disable of the transformPrecoder may be set for the message 3 / message A PUSCH.

[0118] This embodiment may be applied when a specific condition is met, which may be that the PRACH that triggers the RAR is transmitted on a specific RA resource based on the RACH resource partition configuration.

[0119] According to this embodiment, it is possible to clarify the processing when dynamic switching of the PUSCH waveform of message 3 / message A is applied. Furthermore, when an RAR-based instruction is used for dynamic switching of the PUSCH waveform of message 3 / message A, it is possible to use the existing MAC subheader / payload, thereby suppressing an increase in communication overhead.

[0120] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0121] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0122] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0123] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0124] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0125] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0126] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0127] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0128] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0129] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0130] The specific UE capabilities may indicate at least one of the following: Supporting specific processing / operations / control / information for at least one of the above embodiments.

[0131] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0132] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0133] Furthermore, at least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiment (or performs the operations of the above-described embodiment) through higher layer signaling / physical layer signaling. For example, the specific information may be any RRC parameter for a specific release (e.g., Rel. 18 / 19), etc.

[0134] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0135] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal having: a receiver that, when a physical uplink shared channel (PUSCH) waveform can be dynamically switched, receives an RRC parameter transform precoder setting that is set to enabled or disabled, and a maximum rank setting that is set to a specific value or a value smaller than a specific value; and a controller that controls transmission of the PUSCH. [Supplementary Note 2] The terminal according to Supplementary Note 1, in which the transform precoder is set to enabled. [Supplementary Note 3] The terminal according to Supplementary Note 1, in which the transform precoder is set to disabled. [Supplementary Note 4] The terminal according to any one of Supplements 1 to 3, in which the maximum rank is set to 1.

[0136] The following invention is further appended to one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiver that receives downlink control information (DCI); and a controller that, when a physical uplink shared channel (PUSCH) waveform is dynamically switchable and a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) waveform is indicated in the PUSCH, ignores at least one of a demodulation reference signal (DMRS) sequence initialization field and a phase tracking reference signal (PTRS)-DMRS-related field in the DCI. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein, when the PUSCH waveform is dynamically switchable and the DFT-s-OFDM waveform is indicated in the PUSCH, the receiver receives configuration information indicating dynamic switching as resource allocation and receives, via the DCI, indication information indicating Type 1 as frequency domain resource allocation (FDRA), and the controller controls transmission of the PUSCH based on the configuration information and the indication information. [Supplementary Note 3] The terminal according to Supplementary Note 1, wherein the receiving unit receives configuration information indicating Type 1 as resource allocation when the PUSCH waveform is dynamically switchable and the DFT-s-OFDM waveform is instructed for the PUSCH, and the control unit controls transmission of the PUSCH based on the configuration information. [Supplementary Note 4] The terminal according to any of Supplementary Notes 1 to 3, wherein the receiving unit receives configuration information indicating that use of interlace for the PUSCH is enabled when the PUSCH waveform is dynamically switchable and the DFT-s-OFDM waveform is instructed for the PUSCH, and the control unit controls transmission of the PUSCH based on the configuration information.

[0137] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0138] 12 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0139] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0140] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0141] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0142] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0143] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0144] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0145] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0146] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0147] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0148] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0149] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0150] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0151] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0152] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0153] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0154] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0155] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0156] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0157] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0158] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0159] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0160] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0161] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0162] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0163] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0164] (Base Station) Fig. 13 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0165] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0166] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0167] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0168] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0169] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0170] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0171] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0172] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0173] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0174] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0175] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0176] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0177] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0178] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0179] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0180] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0181] When it is possible to dynamically switch the physical uplink shared channel (PUSCH) waveform, the transceiver unit 120 may transmit a conversion precoder setting of an RRC parameter that is set to enabled or disabled, and a maximum rank setting that is set to a specific value or a value smaller than a specific value.

[0182] The control unit 110 may control the reception of the PUSCH.

[0183] The transceiver 120 may transmit downlink control information (DCI).

[0184] The control unit 110 may assume that when a physical uplink shared channel (PUSCH) waveform is dynamically switchable and a discrete Fourier transform spread OFDM (DFT-s-OFDM) waveform is instructed for the PUSCH, at least one of a demodulation reference signal (DMRS) sequence initialization field and a phase tracking reference signal (PTRS)-DMRS related field of the DCI is ignored.

[0185] The transceiver 120 may transmit a configuration indicating that the physical uplink shared channel (PUSCH) waveform is dynamically switchable, and may transmit downlink control information (DCI) and a media access control element (MAC CE).

[0186] The control unit 110 may control reception of a specific type of PUSCH that is dynamically switched based on at least one of the DCI and the MAC CE.

[0187] (User Terminal) Fig. 14 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0188] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0189] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0190] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0191] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0192] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0193] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0194] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0195] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0196] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0197] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0198] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0199] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0200] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0201] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0202] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0203] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0204] When it is possible to dynamically switch the physical uplink shared channel (PUSCH) waveform, the transceiver unit 220 may receive a conversion precoder setting for an RRC parameter that is set to enabled or disabled, and a maximum rank setting that is set to a specific value or a value smaller than a specific value.

[0205] The control unit 210 may control transmission of the PUSCH. The transform precoder may be set to be enabled. The transform precoder may be set to be disabled. The maximum rank may be set to 1.

[0206] The transceiver 220 may receive downlink control information (DCI).

[0207] The control unit 210 may ignore at least one of a demodulation reference signal (DMRS) sequence initialization field and a phase tracking reference signal (PTRS)-DMRS related field of the DCI when the physical uplink shared channel (PUSCH) waveform is dynamically switchable and a discrete Fourier transform spread OFDM (DFT-s-OFDM) waveform is specified for the PUSCH.

[0208] When the PUSH waveform is dynamically switchable and the DFT-s-OFDM waveform is instructed for the PUSH, the transceiver unit 220 may receive configuration information indicating dynamic switching as resource allocation, and receive instruction information indicating Type 1 as frequency domain resource allocation (FDRA) via the DCI, and the control unit 210 may control the transmission of the PUSH based on the configuration information and the instruction information.

[0209] When the PUSCH waveform can be dynamically switched and the DFT-s-OFDM waveform is instructed for the PUSCH, the transceiver unit 220 may receive configuration information indicating type 1 as resource allocation, and the control unit 210 may control the transmission of the PUSCH based on the configuration information.

[0210] The transceiver unit 220 may receive configuration information indicating that the PUSH waveform can be dynamically switched and that the use of interlacing for the PUSH is enabled when the DFT-s-OFDM waveform is instructed for the PUSH, and the control unit 210 may control the transmission of the PUSH based on the configuration information.

[0211] The transceiver 220 may receive a configuration indicating that a physical uplink shared channel (PUSCH) waveform can be dynamically switched, and may receive downlink control information (DCI) and a media access control element (MAC CE).

[0212] The control unit 210 may dynamically switch the waveform of a specific type of PUSCH based on at least one of the DCI and the MAC CE. The specific type of PUSCH may be a Type 1 Configured Grant (CG)-PUSCH or a Type 2 CG-PUSCH. The specific type of PUSCH may be a Message 3 PUSCH or a Message A PUSCH.

[0213] The control unit 210 may dynamically switch the waveform of the message 3 PUSCH or the message A PUSCH based on at least one of a Media Access Control (MAC) subheader or a MAC payload for a random access response (RAR).

[0214] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0215] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0216] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 15 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0217] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0218] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0219] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0220] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0221] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0222] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0223] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0224] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0225] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0226] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0227] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0228] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0229] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0230] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, 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 a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0231] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0232] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0233] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0234] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0235] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0236] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0237] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0238] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0239] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0240] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0241] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0242] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0243] 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.

[0244] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0245] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0246] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0247] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0248] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0249] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0250] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0251] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0252] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0253] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0254] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0255] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0256] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0257] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0258] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0259] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0260] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0261] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0262] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0263] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0264] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0265] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0266] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0267] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0268] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0269] 16 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0270] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0271] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0272] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0273] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0274] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0275] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0276] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0277] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0278] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0279] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0280] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0281] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0282] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0283] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0284] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0285] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0286] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0287] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0288] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0289] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0290] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0291] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0292] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0293] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0294] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0295] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0296] 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, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0297] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0298] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0299] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0300] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiver that receives downlink control information (DCI) including a field that explicitly indicates whether a transform precoder is enabled or disabled; a controller that is capable of dynamically switching a waveform for a Physical Uplink Shared Channel (PUSCH) to a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform or a Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform by the DCI, and that applies the dynamic switching to the PUSCH scheduled by the DCI when the dynamic switching is indicated by the field.

2. Receiving downlink control information (DCI) including a field that explicitly indicates whether a transform precoder is enabled or disabled; the DCI enables dynamic switching of a waveform for a Physical Uplink Shared Channel (PUSCH) to a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform or a Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform, and if the dynamic switching is indicated by the field, applies the dynamic switching to the PUSCH scheduled by the DCI.

3. A system including a terminal and a base station, The terminal a receiver for receiving downlink control information (DCI) including a field that explicitly indicates whether a transform precoder is enabled or disabled; a controller that is capable of dynamically switching a waveform for a Physical Uplink Shared Channel (PUSCH) to a Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform or a Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform by the DCI, and that applies the dynamic switching to the PUSCH scheduled by the DCI when the dynamic switching is indicated by the field; The base station A system comprising a transmitter that transmits the DCI to the terminal.