Terminal and communication method

Abstract

To provide a terminal that can clarify transform precoding related to a reference signal for suppressing phase fluctuations in an uplink channel and UL resource muting, and can operate appropriately.SOLUTION: A terminal includes a received signal that receives information regarding the use of a reference signal to suppress phase fluctuations in an uplink channel, and a control unit that, when the information indicates non-use of the reference signal, determines the number of uplink data to be transform precoded and transmitted in one symbol on the basis of the number of resource elements to be muted.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to a terminal and a communication method. [Background technology]

[0002] The 3rd Generation Partnership Project (3GPP (registered trademark)) has developed specifications for the 5th generation mobile communication system (also known as 5G, New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution, or 6G.

[0003] For 5G, technologies that satisfy the requirements such as a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, and low power consumption are being considered (for example, Non-Patent Document 1).

[0004] In NR, either DFT-s-OFDM or CP OFDM is enabled as the UL waveform by higher layer parameters such as RRC parameters. DFT-s-OFDM generates and transmits OFDM symbols based on data (signals) spread by DFT (transform precoding).

[0005] At the RAN1#119 meeting, some agreement was reached regarding Transform Precoding in UL Resource Muting. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] 3GPP TS 38.300 V17.6.0 (2023-09) [Non-patent document 2] “New WID: Evolution of NR duplex operation: Sub-band full duplex (SBFD)”, RP-234035, 3GPP TSG RAN#102, 3GPP, December 2023 [Non-patent document 3] 3GPP TS 38.211 V18.5.0 (2024-12) Summary of the Invention

[0007] However, there has been insufficient research into transform precoding related to reference signals for suppressing phase fluctuations in the uplink channel and UL resource muting, and further research is needed.

[0008] One aspect of the present disclosure is to clarify transform precoding related to reference signals for suppressing phase fluctuations in uplink channels and UL resource muting, and to provide a terminal and a communication method that can operate appropriately. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes a received signal that receives information regarding the use of a reference signal to suppress phase fluctuations in an uplink channel, and a control unit that, if the information indicates non-use of the reference signal, determines the number of uplink data to be transform precoded and transmitted in one symbol based on the number of resource elements to be muted. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of a wireless communication system according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a diagram illustrating an example of a frequency range used in a wireless communication system according to an embodiment of the present disclosure. [Figure 3]1A to 1C are diagrams illustrating exemplary configurations of radio frames, subframes, and slots used in a radio communication system according to an embodiment of the present disclosure. [Figure 4] FIG. 10 is a diagram illustrating comb-2. [Figure 5] 1 is an example of a block configuration of DFT-s-OFDM. [Figure 6] FIG. 1 is a diagram illustrating division of complex-valued symbols. [Figure 7] 1 is an example of a block configuration of DFT-s-OFDM. [Figure 8] 1 is an example of a block configuration of DFT-s-OFDM. [Figure 9] FIG. 2 is a block diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 10] FIG. 2 is a block diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. [Figure 12] 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment according to one aspect of the present disclosure will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present disclosure is applied is not limited to the following embodiment.

[0012] <Wireless communication system> 1 is a diagram illustrating an example of a wireless communication system 10 according to an embodiment of the present disclosure. The wireless communication system 10 is a wireless communication system conforming to 5G NR, and includes a Next Generation-Radio Access Network 20 (hereinafter, referred to as NG-RAN 20) and a terminal 200 (hereinafter, also referred to as UE (User Equipment) 200).

[0013] The wireless communication system 10 may be a wireless communication system conforming to a system called Beyond 5G, 5G Evolution, or 6G.

[0014] The NG-RAN 20 includes a base station 100A (hereinafter also referred to as gNB 100A) and a base station 100B (hereinafter also referred to as gNB 100B). When it is not necessary to distinguish between the gNB 100A, the gNB 100B, etc., they are collectively referred to as gNBs or base stations 100. Furthermore, the number of gNBs and UEs is not limited to the example shown in FIG. 1.

[0015] The NG-RAN 20 actually includes multiple NG-RAN nodes, specifically, gNBs (or ng-eNBs), and is connected to a 5G-compliant core network (5GC, not shown). Note that the NG-RAN 20 and 5GC may simply be referred to as a "network." In the following description, the term "gNB" may be replaced with the term "network (NW)."

[0016] As an example, the gNB100A and the gNB100B are base stations conforming to 5G, and perform 5G wireless communication with the UE 200. The gNB100A, the gNB100B, and the UE 200 may support MIMO (Multiple-Input Multiple-Output), which generates a more directional beam BM by controlling radio signals transmitted from multiple antenna elements, carrier aggregation (CA), which uses a bundle of multiple component carriers (CC), and dual connectivity (DC), which performs communication between the UE and each of two NG-RAN nodes.

[0017] Furthermore, the wireless communication system 10 may support multiple frequency ranges (FR). Fig. 2 is a diagram showing an example of FRs used in the wireless communication system 10. As shown in Fig. 2, the wireless communication system 10 may support FR1 and FR2. The frequency bands of each FR are, for example, as follows: FR1: 410MHz~7.125GHz FR2: 24.25GHz~52.6GHz

[0018] FR1 may use a sub-carrier spacing (SCS) of 15 kHz, 30 kHz, or 60 kHz, and a bandwidth (BW) of 5 to 100 MHz. FR2 is a higher frequency than FR1, and may use an SCS of 60 kHz or 120 kHz (including 240 kHz), and a bandwidth (BW) of 50 to 400 MHz.

[0019] Note that the SCS may be interpreted as a numerology, which is defined in 3GPP TS 38.300 and corresponds to one subcarrier spacing in the frequency domain.

[0020] Furthermore, the wireless communication system 10 may support a frequency band higher than the FR2 frequency band. Specifically, the wireless communication system 10 may support a frequency band exceeding 52.6 GHz up to 114.25 GHz. For convenience, such a high frequency band may be referred to as "FR2x." When using a frequency band exceeding 52.6 GHz, CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) / DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) with a larger SCS may be applied.

[0021] Fig. 3 is a diagram showing an example of the configuration of a radio frame (system frame), subframe, and slot used in the radio communication system 10. As shown in Fig. 3, one slot is made up of 14 symbols, and the larger (wider) the SCS, the shorter the symbol period (and slot period). However, the SCS is not limited to the interval (frequency) shown in Fig. 3. For example, 480 kHz, 960 kHz, etc. may be used as the SCS.

[0022] Furthermore, the number of symbols constituting one slot does not necessarily have to be 14 (for example, it may be 28 or 56 symbols, etc.) Furthermore, the number of slots per subframe may differ depending on the SCS.

[0023] The time direction (t) shown in Fig. 3 may be called a time domain, a symbol period, a symbol time, etc. The frequency direction may be called a frequency domain, a resource block, a subcarrier, a bandwidth part (BWP), etc.

[0024] The gNB100 transmits control information, configuration information, etc. to the UE200 as a downlink (DL) signal.

[0025] Also, for example, gNB100 receives control information, data signals, information regarding the processing capabilities of UE200 (terminal capabilities (information); for example, UE capability), etc. from UE200 as uplink (UL) signals.

[0026] Channels used for transmitting DL signals include, for example, data channels and control channels. For example, the data channel may include a physical downlink shared channel (PDSCH), and the control channel may include a physical downlink control channel (PDCCH). For example, the gNB 100 transmits control information to the UE 200 using the PDCCH, and transmits DL data signals using the PDSCH. Note that the PDSCH is an example of a downlink shared channel, and the PDCCH is an example of a downlink control channel. Note that the PDCCH may be interpreted as downlink control information (DCI), control information, etc. transmitted in the PDCCH.

[0027] The reference signal included in the DL signal may include, for example, at least one of a DMRS (Demodulation Reference Signal), a PTRS (Phase Tracking Reference Signal), a CSI-RS (Channel State Information - Reference Signal), an SRS (Sounding Reference Signal), and a PRS (Positioning Reference Signal) for positioning information. For example, reference signals such as the DMRS and the PTRS (or the PT-RS) are used to demodulate DL data signals and are transmitted using the PDSCH.

[0028] The UE 200 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable device, or an M2M (Machine-to-Machine) communication module.

[0029] The UE 200 receives control signals or data signals from the gNB 100 via DL and transmits control signals or data signals to the gNB 100 via UL, thereby utilizing various communication services provided by the wireless communication system 10. The UE 200 also receives various reference signals transmitted from the gNB 100 and measures the propagation path quality based on the reception results of the reference signals.

[0030] For example, UE200 receives control information, configuration information, etc. from gNB100 as a DL signal.

[0031] Also, for example, UE200 transmits control information, data signals, terminal capability information of UE200, etc. to gNB100 as UL signals.

[0032] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channel may include a Physical Uplink Shared Channel (PUSCH), and the control channel may include a Physical Uplink Control Channel (PUCCH). For example, the UE 200 transmits control information using the PUCCH and transmits UL data signals using the PUSCH. Note that the PUSCH is an example of an uplink shared channel, and the PUCCH is an example of an uplink control channel. Note that the PUSCH or the PUCCH may be interpreted as uplink control information (UCI), control information, etc. transmitted in the PUSCH or the PUCCH.

[0033] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRSRS, and PRS for location information. For example, reference signals such as DMRS and PTRS are used to demodulate UL data signals and are transmitted using PUSCH. Hereinafter, "and / or" may be written as " / ".

[0034] <sbfd> In Rel-18, the extension of duplexing methods was considered. Specifically, Sub-Band Non-Overlapping Full Duplex (SBFD) was proposed as a new duplexing method that enables simultaneous use of downlink (DL) and uplink (UL) within a carrier of a time division duplexing (TDD) band. SBFD may also be read as Cross Division Duplex (XDD) (see, for example, Non-Patent Document 2). ·SBFD symbol: Symbol for which SBFD sub-band is set. Non-SBFD symbol: A symbol for which no SBFD sub-band is configured. DL (or semi-static D) symbol: A symbol designated as DL by higher layer (RRC) parameters such as TDD-UL-DL-ConfigurationCommon / TDD-UL-DL-ConfigDedicated. UL (or semi-static U) symbol: A symbol designated as UL by higher layer parameters such as TDD-UL-DL-ConfigurationCommon / TDD-UL-DL-ConfigDedicated. Flexible (or semi-static F or Flexible) symbol: A symbol designated as flexible by higher layer parameters such as TDD-UL-DL-ConfigurationCommon / TDD-UL-DL-ConfigDedicated. SBFD DL symbol: A symbol specified as DL by higher layer parameters such as tdd-UL-DL-ConfigurationCommon / tdd-UL-DL-ConfigurationDedicated and configured with SBFD subbands. SBFD Flexible Symbol: A symbol that is specified as flexible by parameters such as tdd-UL-DL-ConfigurationCommon / tdd-UL-DL-ConfigurationDedicated and has SBFD sub-bands configured.

[0035] <cli> In a wireless communication system, interference can occur between different links (CLI: Cross Link Interference). For example, the wireless link of a certain cell / base station can interfere with the wireless link of another cell / base station.

[0036] In the SBFD symbol / slot, for example, in a certain base station (e.g., gNB#1), the UL signal transmitted from a terminal within the coverage of gNB#1 may be interfered with by the DL signal transmitted from another base station (e.g., gNB#2) (gNB-to-gNB CLI).

[0037] <WID Goals for Rel19 Evolution of NR Duplex Operation> Enhancements for CLI handling were updated at RAN#104. · UL resource muting for PUSCH, including [RAN1, RAN2, RAN4]. · Indication / decision of UL resource muting for PUSCH based on a quasi-static setting. Assume comb-2 for both DFT-S-OFDM (Discrete Fourier Transform-spread-OFDM) and CP-OFDM (Cyclic Prefix-OFDM) in each allocated PRB, and assume a maximum of two symbols in the time domain.

[0038] The quasi-static setting may be a higher layer parameter such as an RRC parameter, for example.

[0039] Figure 4 is a diagram for explaining comb-2. The pattern of resources muting the transmission of the UL signal (hereinafter, Muting pattern) may include a pattern in the frequency domain (muting pattern). The muting pattern in the frequency domain can be set at the sub-carrier level.

[0040] The muting pattern may be a pattern in which p (p is an integer greater than or equal to 1) muting sub-carriers (muting sub-carriers) and q (q is an integer greater than or equal to 1) non-muting (non-muting sub-carriers) are alternately repeated. For example, as shown in FIG. 4, the muting pattern may be a pattern (comb-2) in which one muting sub-carrier and one non-muting sub-carrier are alternately repeated. The sub-carrier may be read as a PRB (Physical Resource Block) or a RE (Resource Element).

[0041] Note that in NR, as the UL waveform, either DFT-s-OFDM or CP OFDM is enabled by upper layer parameters such as RRC parameters. DFT-s-OFDM generates and transmits an OFDM symbol based on data spread by DFT. In CP OFDM, spreading by DFT is not performed. CP OFDM generates and transmits an OFDM symbol based on data for which spreading by DFT is not performed.

[0042] UL resource muting, UL muting, resource muting, muting, and stopping can be used interchangeably. Data and signals can be used interchangeably. DFT (or DFT-s) and transform precoding can be used interchangeably.

[0043] <RAN1#119 consensus> At the RAN1#119 meeting, some agreements were made regarding transform precoding in UL resource muting.

[0044] · Agreement 1 When transform precoding (DFT-s-OFDM) is enabled for PUSCH, it was agreed that the following two options would be further considered. · Option 1: For symbols with UL resource muting, the DFT size is changed to the following (1).

number

number

[0045] For example, in option 1, when PUSCH (UL) is UL resource muted in comb-2, the DFT size is changed to half the total number of subcarriers of the PUSCH. For example, in option 2, when PUSCH is UL resource muted in comb-2, the DFT size is the total number of subcarriers of the PUSCH.

[0046] It is FFS whether either Option 1 or Option 2 needs to be reflected in the RAN1 specification.

[0047] Agreement 2 If an UL resource muting symbol overlaps with a symbol containing a UL Demodulation Reference Signal (DMRS) for PUSCH, the DMRS takes priority, i.e., the terminal does not apply UL resource muting in the symbol.

[0048] Agreement 3 If an UL resource muting symbol overlaps with a symbol containing a PTRS for a PUSCH and transform precoding is not enabled for the PUSCH, the terminal does not expect the muted RE to overlap with the RE occupied by the PTRS.

[0049] <PUSCHトランスフォームプリコーディング> 5 shows an example of a block configuration of DFT-s-OFDM. When the use of PTRS is instructed, Insert PTRS inserts a PTRS (PTRS sequence) into time domain data. When the use of PTRS is not instructed, Insert PTRS does not insert a PTRS into time domain data. Whether or not a PTRS is used may be instructed by, for example, higher layer parameters such as RRC parameters / lower layer parameters such as DCI.

[0050] The S / P performs serial-to-parallel conversion on the data output from the Insert PTRS. The M-point DFT applies an M-point DFT to the data output from the S / P. The M-point DFT (transform precoding) is based on the following equation (3) (see, for example, Chapter 6.3.1.4 of Non-Patent Document 3).

number

[0051] When PTRS is not used, the block of complex-valued symbols for a single layer (see, for example, Time domain data in Figure 5) is divided into sets, each of which corresponds to one OFDM symbol (see box A6a in Figure 6). Each set contains the following (4) complex-valued symbols:

number

[0052] When it is indicated that PTRS is to be used, a block of complex-valued symbols (see, e.g., Time domain data in FIG. 5) is divided into sets, and each set corresponds to one OFDM symbol (see frame A6b in FIG. 6). Each set contains the complex-valued symbols of the following (5). [Number] That is, when PTRS is used and one or more PTRS samples are included in the OFDM symbol, the number of complex-valued symbols input to the DFT is the total number of subcarriers of the PUSCH minus the number of samples of the PTRS. When PTRS is used and one or more PTRS samples are not included in the OFDM symbol, the number of complex-valued symbols input to the DFT is equal to the total number of subcarriers of the PUSCH.

[0053] The complex-valued symbols (blocks of complex-valued symbols) divided into sets may be referred to as UL data, PUSCH data, or UL-SCH data. The UL data, PUSCH data, and UL-SCH data do not include reference signals and may include user data / control data.

[0054] [Consideration] As described in the above <RAN1#119 agreement>, some considerations have been made regarding transform precoding in UL resource muting. However, the consideration regarding transform precoding for PTRS and UL resource muting is insufficient, and the terminal may not operate properly in some cases.

[0055] Therefore, the present disclosure provides a technique for transform precoding related to PTRS and UL resource muting.

[0056] As described in the above <RAN1#119 agreement>, it was agreed that two options would be considered for UL muting of PUSCH to which transform precoding is applied. · Option 1: For symbols with UL resource muting, the DFT size is changed to the above (1). · Option 2: For symbols with UL resource muting, the DFT size is the above (2).

[0057] For Option 1, the PUSCH data may be rate-matched on the unmuted RE. For example, as shown in FIG. 7, the DFT size is set to half of the total number of subcarriers of the PUSCH and rate-matched.

[0058] For Option 2, puncturing may be applied to the muting RE. For example, as shown in FIG. 8, the DFT size is set to the total number of subcarriers of the PUSCH and punctured.

[0059] Since rate-matching can be applied to UL muting of PUSCH without transform precoding, Option 1 is preferred from the perspective of the unified principle. For example, considering that CP-OFDM without transform precoding is also enabled, Option 1 where rate-matching can be applied in UL muting is preferred. That is, it is preferable that the size of transform precoding is adjusted for rate-matching.

[0060] <Proposal 1> In Proposal 1, transform precoding when PTRS is not used will be described.

[0061] When PTRS is not used, the block of complex-valued symbols shown in (6) below for single layer "λ=0" is divided into sets shown in (7) below, where each set corresponds to one OFDM symbol and can be transmitted in one OFDM symbol.

number

number

[0062] The set l includes the following (8) number of complex-valued symbols:

number

[0063] That is, when PTRS is not used, the number of complex-valued symbols to be transform precoded (input to DFT) corresponding to one OFDM symbol may vary depending on the presence (number) of muting REs.

[0064] For example, if the use of PTRS is not indicated and OFDM symbol l has muting RE (ρ l = 1), the number of complex-valued symbols to be transform precoded is the total number of subcarriers of the PUSCH minus half of the total number of subcarriers of the PUSCH. l =0), the number of complex-valued symbols to be transform precoded is the total number of subcarriers of the PUSCH.

[0065] If OFDM symbol l has muting RE (ρ l =1), and the following equation (9) is applied as transform precoding.

number

[0066] In equation (9), the total number of subcarriers of PUSCH included in equation (3) is halved (1 / 2).

[0067] <Proposal 1: Summary> As described above, when PTRS is not used, the terminal is transform precoded and determines the number of complex-valued symbols transmitted in one symbol based on the number of muting RE. As a result, the transform precoding regarding PTRS and UL resource muting is clarified, and the terminal can operate appropriately. Also, the impact on the specification can be reduced.

[0068] <Proposal 2> In Proposal 2, the transform precoding when PTRS is used is described. In Proposal 2, the following techniques of Option 1 to Option 4 are provided.

[0069] <Proposal 2: Option 1> The terminal does not expect that the RE to be muted overlaps with the RE occupied by PTRS.

[0070] For example, when the use of PTRS is indicated and UL muting is indicated, the terminal does not expect that the RE to be muted overlaps with the RE occupied by PTRS. In other words, when the use of PTRS is indicated and the DFT size (the number of complex-valued symbols per set) is halved to the total number of subcarriers of PUSCH (Option 1 of <RAN1#119 agreement>), the terminal does not expect that the RE to be muted overlaps with the RE occupied by PTRS.

[0071] Option 1 has no impact on transform precoding, but restricts scheduling to prevent overlap of PTRS and muting resources.

[0072] <Proposal 2: Option 2> UL muting does not apply on REs with PTRS.

[0073] When PTRS is used, the block of complex-valued symbols shown in (10) below for single layer "λ=0" is divided into sets shown in (11) below, where each set corresponds to one OFDM symbol and can be transmitted in one OFDM symbol.

number

number

[0074] The set l contains the following (12) number of complex-valued symbols:

number

[0075] That is, the number of complex-valued symbols to be transform precoded corresponding to one OFDM symbol may vary depending on the number of samples of the PTRS and the number of muting REs.

[0076] For example, when the use of PTRS is instructed and UL muting is instructed, the number of complex-valued symbols to be transform precoded is the total number of subcarriers of the PUSCH minus the number of samples of the PTRS and the number of muting REs.When the use of PTRS is instructed and UL muting is not instructed, the number of complex-valued symbols to be transform precoded is the total number of subcarriers of the PUSCH minus the number of samples of the PTRS.

[0077] In Option 2, UL muting is not applied on REs with PTRS. Therefore, when UL muting is indicated, the number of complex-valued symbols to be transform precoded depends on the number of muting REs on symbol l. Therefore, Option 2 is the most complex of the four options in Proposal 2.

[0078] <Proposal 2: Option 3> UL muting is not applied on symbols containing more than one PTRS sample.

[0079] When PTRS is used, the block of complex-valued symbols shown in (13) below for single layer "λ=0" is divided into sets shown in (14) below, where each set corresponds to one OFDM symbol and can be transmitted in one OFDM symbol.

number

number

[0080] The set l contains the following (15) number of complex-valued symbols:

number

[0081] That is, if one OFDM symbol does not contain a PTRS sample (ε l =0), UL muting is applied (ρ l = 1), the number of complex-valued symbols to be transform precoded is half the total number of PUSCH subcarriers. If one OFDM symbol contains PTRS samples (ε l =1), and UL muting is not applied (ρ l =0), the number of complex-valued symbols to be transform precoded is the total number of PUSCH subcarriers minus the number of PTRS samples.

[0082] Option 3 is similar to the DMRS solution described in Agreement 2 in the above <RAN1#119 Agreement>, and the impact on the specification is not complicated.

[0083] <Proposal 2: Option 4> When PTRS is transmitted, UL muting is not applied on PUSCH using DFT-s-OFDM. In other words, when DFT-s-OFDM is enabled and PTRS is transmitted, UL muting is not performed.

[0084] Option 4 imposes restrictions on the application of UL muting. In Option 4, the opportunity for UL muting to be applied is reduced.

[0085] <Proposal 2: Summary> As described above, when PTRS is used, the technologies of the above Options 1 to 4 are provided. Thereby, the transform precoding regarding PTRS and UL resource muting is clarified, and the terminal can operate appropriately. Also, the impact on the specification can be small.

[0086] <UE capability> In the UE capability indicating the capabilities of the terminal, the following information indicating the capabilities of the terminal may be included. For example, the following new UE capability and report signaling (and RRC configuration) may be defined. Note that the information indicating the capabilities of the terminal may correspond to the information defining the capabilities of the terminal. The UE may report the following information indicating the capabilities of the terminal to the gNB. · The capabilities of the terminal regarding each proposal · The capabilities regarding each option in each proposal, or combinations of each option · The capabilities regarding each alternative in each proposal, or combinations of each alternative The UE may report the information indicating the capabilities of the terminal to the gNB for each frequency. · Capabilities for UE / FR1 / FR2 / FR2-1 / FR2-2 / FR3 / SCS / band / BC / FC / FSPC etc. The UE may report information indicating the above terminal capabilities for each cell to the gNB. Capabilities for each UE / cell / TDD / FDD, etc.

[0087] <Notes> <Note 1: Combination with options> In each proposal of the present disclosure, which proposal applies or which option or alternative is used may be determined by the following: - Set by upper layer parameters Determined by related higher level parameters Indicated in MAC CE or DCI Determined based on UE capabilities - Listed in the specifications - Determined based on the conditions stated in the specifications Determined by higher layer parameters / MAC CE / DCI configuration and reported UE capabilities (combination of the above decisions)

[0088] In each proposal in this disclosure, multiple options and alternatives may be combined into a single option / alternative, and throughout the proposals, the measured reference signal (RS) will be the QCL source RS in the active / indicated TCI state.

[0089] <Note 2: Signal from NW to UE> In this disclosure, the UE may receive the following types of information from the network (NW): Also, throughout the proposal, the network (NW) may be referred to as a gNB. Information via higher layer signaling (e.g., RRC messages / LPP (LTE propositioning protocol) messages) MAC CE Subheader with new LCID in the subheader Extending an existing MAC CE (e.g., introducing a new octet) DCI DCI Field: Existing DCI field or newly introduced DCI field RNTI: DCI with CRC scrambled by the existing RNTI or the newly introduced RNTI DCI Format: Existing DCI format or newly introduced DCI format

[0090] <Note 3: Signal from NW to UE> Combination of the above information

[0091] In the present disclosure, the UE may receive information from the network (NW) in the following periodic format: Option 1: Receive periodic updates Option 2: Semi-persistent reception of information (triggered by UE or gNB instructions) Option 3: Aperiodic information reception (triggered by UE or gNB instructions)

[0092] In the present disclosure, the UE may receive information from the network (NW) as the following QCL rules: QCL Type A QCL Type B QCL Type C QCL Type D

[0093] In this disclosure, the QCL resource RS for each QCL type may be configured as follows: SSB (SS / PBCH Block) CSI-RS with / without repetition ·TRS(tracking reference signal) PDCCH / PDSCH DMRS

[0094] In the present disclosure, information from the network (NW) is set / indicated as follows: ·UE common / UE only Cell specific / Cell common Per UE / CC / BWP / band / cell / CG

[0095] <Note 4: Signal from UE to NW> In this disclosure, the UE may report the following types of information to the network (NW): Also, throughout the proposal, the network (NW) may be referred to as a gNB. Information via higher layer signaling (e.g. RRC message / LPP message) MAC CE Subheader with new LCID in the subheader Extending an existing MAC CE (e.g., introducing a new octet) UCI UCI on PUCCH or PUSCH Combination of the above information

[0096] In the present disclosure, the UE may report information to the network (NW) in a periodic manner as follows: Option 1: Send information periodically Option 2: Semi-persistent information transmission (triggered by UE or gNB instruction) Option 3: Aperiodic information transmission (triggered by UE or gNB instructions)

[0097] <Base station configuration> 9 is a block diagram showing an example of the configuration of base station 100 according to this embodiment. Base station 100 includes, for example, a transmitting unit 101, a receiving unit 102, and a control unit 103. Base station 100 communicates with terminal 200 (see FIG. 10) by radio.

[0098] Transmitter 101 transmits a downlink (DL) signal to terminal 200. For example, transmitter 101 transmits a DL signal (for example, the above-mentioned RRC, SIB, MAC CE, DCI, notification, confirmation, etc.) under the control of controller 103.

[0099] The DL signal may include, for example, a downlink data signal and control information (e.g., Downlink Control Information (DCI)). The DL signal may also include information indicating scheduling related to signal transmission of terminal 200 (e.g., an UL grant). The DL signal may also include control information of higher layers (e.g., control information of Radio Resource Control (RRC)). The DL signal may also include a reference signal.

[0100] Channels used for transmitting DL signals include, for example, a downlink data channel and a downlink control channel. For example, the downlink data channel may include a PDSCH (Physical Downlink Shared Channel), and the downlink control channel may include a PDCCH (Physical Downlink Control Channel). For example, base station 100 transmits downlink control information to terminal 200 using the PDCCH and transmits downlink data signals using the PDSCH.

[0101] The reference signal included in the DL signal may include at least one of a demodulation reference signal (Demodulation Reference Signal (DMRS)), a Phase Tracking Reference Signal (PTRS), a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and a Positioning Reference Signal (PRS) for position information. For example, reference signals such as DMRS and PTRS are used for demodulating downlink data signals and are transmitted using the PDSCH.

[0102] The receiver 102 receives an uplink (UL) signal transmitted from the terminal 200. For example, under the control of the controller 103, the receiver 102 receives an UL signal (for example, the above-mentioned request, notification, etc.).

[0103] The control unit 103 controls the communication operations of the base station 100, including the transmission processing of the transmission unit 101 and the reception processing of the reception unit 102. For example, the control unit 103 performs operations other than the transmission and reception described in the above embodiment (note that these operations may be performed by the reception unit 102 and / or the transmission unit 101).

[0104] For example, the control unit 103 acquires information such as data and control information from the upper layer and outputs it to the transmitting unit 101. The control unit 103 also outputs the data, control information, etc. received from the receiving unit 102 to the upper layer.

[0105] For example, control unit 103 allocates resources (or channels) used for transmitting and receiving DL signals and / or resources used for transmitting and receiving UL signals based on signals (e.g., data and control information, etc.) received from terminal 200 and / or data and control information, etc. acquired from a higher layer. Information related to the allocated resources may be included in control information transmitted to terminal 200.

[0106] Control section 103 configures PUCCH resources as an example of allocation of resources used for transmitting and receiving UL signals. Information relating to PUCCH configuration such as a PUCCH cell timing pattern (PUCCH configuration information) may be reported to terminal 200 by RRC.

[0107] The transmitter 101 may transmit information regarding the use of a reference signal for suppressing phase fluctuations in an uplink channel. The uplink channel may be a PUSCH. The reference signal may be a PTRS.

[0108] When the information transmitted by the transmitter 101 indicates non-use of a reference signal, the control unit 103 may assume that the number of uplink data to be transformed precoded and transmitted in one symbol is determined based on the number of muted resource elements. The symbol may be an OFDM symbol or a symbol constituting a slot (a symbol in the time domain). The uplink data may be a complex-valued symbol. The number of uplink data may be as defined in (8) above.

[0109] When the information transmitted by the transmitting unit 101 indicates the use of a reference signal, the control unit 103 may schedule the resource elements to be muted so that they do not overlap with the resource elements occupied by the reference signal.

[0110] When the information transmitted by the transmitting unit 101 indicates the use of a reference signal, the control unit 103 may assume that muting is not applied to the resource element having the reference signal.

[0111] When the information transmitted by the transmitting unit 101 indicates the use of a reference signal, the control unit 103 may assume that no muting is applied to symbols containing one or more reference signals.

[0112] When the information transmitted by the transmitting unit 101 indicates the use of a reference signal, the control unit 103 may assume that muting is not applied to the uplink channel using DFT-s-OFDM.

[0113] <Device configuration> 10 is a block diagram showing an example of the configuration of terminal 200 according to this embodiment. Terminal 200 includes, for example, receiving section 201, transmitting section 202, and control section 203. Terminal 200 communicates with base station 100, for example, wirelessly.

[0114] The terminal 200 includes, for example, a receiving unit 201, a transmitting unit 202, and a control unit 203. The terminal 200 communicates with the base station 100, for example, wirelessly.

[0115] The receiving unit 201 receives a DL signal transmitted from the base station 100. For example, the receiving unit 201 receives the DL signal under the control of the control unit 203.

[0116] The transmitter 202 transmits the UL signal to the base station 100. For example, the transmitter 202 transmits the UL signal under the control of the controller 203.

[0117] The UL signal may include, for example, an uplink data signal and control information (e.g., UCI). For example, information related to the processing capability of terminal 200 (e.g., UE capability) may be included. The UL signal may also include a reference signal.

[0118] Channels used for transmitting UL signals include, for example, data channels and control channels. For example, the data channels include a PUSCH (Physical Uplink Shared Channel), and the control channels include a PUCCH (Physical Uplink Control Channel). For example, terminal 200 receives control information from base station 100 using the PUCCH and transmits uplink data signals using the PUSCH.

[0119] The reference signals included in the UL signal may include, for example, at least one of DMRS, PTRS, CSI-RS, SRS, and PRS. For example, the reference signals such as DMRS and PTRS are used for demodulating the uplink data signal and are transmitted using an uplink channel (for example, PUSCH).

[0120] The control unit 203 controls the communication operations of the terminal 200 , including the reception processing in the reception unit 201 and the transmission processing in the transmission unit 202 .

[0121] For example, the control unit 203 acquires information such as data and control information from a higher layer and outputs it to the transmitting unit 202. Also, the control unit 203 outputs, for example, the data and control information received from the receiving unit 201 to the higher layer.

[0122] For example, the control unit 203 controls transmission of information to be fed back to the base station 100. The information to be fed back to the base station 100 may include, for example, HARQ-ACK, Channel State Information (CSI), or a Scheduling Request (SR). The information to be fed back to the base station 100 may be included in UCI. The UCI is transmitted in the resources of the PUCCH.

[0123] Control unit 203 configures PUCCH resources based on configuration information (for example, configuration information such as a PUCCH cell timing pattern and / or DCI notified by RRC) received from base station 100. Control unit 203 determines PUCCH resources to be used for transmitting information to be fed back to base station 100. Under the control of control unit 203, transmission unit 202 transmits the information to be fed back to base station 100 in the PUCCH resources determined by control unit 203.

[0124] Note that the channel used for transmitting the DL signal and the channel used for transmitting the UL signal are not limited to the above-mentioned examples. For example, the channel used for transmitting the DL signal and the channel used for transmitting the UL signal may include a Random Access Channel (RACH) and a Physical Broadcast Channel (PBCH). The RACH may be used to transmit Downlink Control Information (DCI) including a Random Access Radio Network Temporary Identifier (RA-RNTI), for example.

[0125] The receiver 201 may receive information regarding the use of a reference signal for suppressing phase fluctuations in an uplink channel. The uplink channel may be a PUSCH. The reference signal may be a PTRS.

[0126] When the information received by the receiving unit 201 indicates non-use of a reference signal, the control unit 203 may determine the number of uplink data to be transform precoded and transmitted in one symbol based on the number of muted resource elements. The symbol may be an OFDM symbol or a symbol constituting a slot (a symbol in the time domain). The uplink data may be a complex-valued symbol. The number of uplink data may be as defined in (8) above.

[0127] If the information received by the receiver 201 indicates the use of a reference signal, the controller 203 may not assume that the resource elements to be muted overlap with the resource elements occupied by the reference signal.

[0128] The control unit 203 may determine not to apply muting to resource elements having reference signals when the information received by the receiving unit 201 indicates the use of reference signals. For example, the control unit 203 may determine uplink transmission (PUSCH transmission) in resource elements having reference signals.

[0129] The control unit 203 may determine not to apply muting to symbols including one or more reference signals when the information received by the receiving unit 201 indicates the use of reference signals. For example, the control unit 203 may determine uplink transmission in symbols including one or more reference signals.

[0130] The control unit 203 may determine not to apply muting to the uplink channel using DFT-s-OFDM when the information received by the receiving unit 201 indicates the use of a reference signal. For example, the control unit 203 may determine uplink transmission in the uplink channel using DFT-s-OFDM.

[0131] The present disclosure has been described above. Note that the division of items in the above description is not essential to the present disclosure, and items described in two or more items may be used in combination as needed, and items described in one item may be applied to items described in another item (unless they are inconsistent).

[0132] <Hardware configuration> 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 also be realized by combining the single device or multiple devices with software.

[0133] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0134] For example, a base station, a terminal, or the like 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. 11 is a diagram illustrating an example of the hardware configuration of a base station 100 and a terminal 200 according to an embodiment of the present disclosure. The above-described base station 100 and terminal 200 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, and the like.

[0135] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of base station 100 and terminal 200 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0136] Each function in the base station 100 and the terminal 200 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0137] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 103 and control unit 203 may be realized by the processor 1001.

[0138] Furthermore, the processor 1001 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 203 of the terminal 200 may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may also be transmitted from a network via a telecommunications line.

[0139] The memory 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The memory 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0140] Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, a database, a server, or other appropriate medium including at least one of memory 1002 and storage 1003.

[0141] 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 transmitter 101, receiver 102, receiver 201, transmitter 202, etc. may be realized by the communication device 1004.

[0142] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0143] 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.

[0144] Furthermore, base station 100 and terminal 200 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0145] <Information notification, signaling> The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, and broadcast information (Master Information Block (MIB) and System Information Block (SIB))), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0146] <Applicable systems> Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0147] <Processing procedures, etc.> The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless it is consistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0148] <Base station operation> In the present disclosure, a specific operation described as being performed by a base station may be performed by its upper node in some cases. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by at least one of the base station and another network node other than the base station (for example, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station, a combination of multiple other network nodes (for example, an MME and an S-GW) may also be used.

[0149] <Input / output direction> Information, etc. (see the section on information and signals) can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may also be input / output via multiple network nodes.

[0150] <Handling of input and output information> Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0151] <Judgment method> The determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0152] <Variations of form, etc.> Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0153] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure.

[0154] <Software> 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.

[0155] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), then these wired and / or wireless technologies are included within the definition of transmission media.

[0156] <Information, Signals> 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.

[0157] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0158] <System, Network> As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0159] <Parameter, channel name> 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 an index.

[0160] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0161] <Base station> In this disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0162] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0163] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0164] <Mobile station> In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0165] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0166] <Base station / mobile station> At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0167] Furthermore, a base station in the present disclosure may be read as a 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 terminal is replaced with communication between multiple terminals (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 200 may be configured to have the functions of the base station 100 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0168] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 100 may be configured to have the functions of the terminal 200 described above.

[0169] Fig. 12 shows an example configuration of a vehicle 2001. As shown in Fig. 12, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0170] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0171] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0172] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0173] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0174] The information service unit 2012 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.

[0175] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0176] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0177] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0178] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2029 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2029, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0179] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 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 2013 (or data / information decoded from the PDSCH)).

[0180] Furthermore, the communication module 2013 stores various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, sensors 2021 to 2029, and the like provided in the vehicle 2001.

[0181] <Terminology and interpretation> As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0182] The terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0183] <Reference signal> The reference signal may be abbreviated as RS (Reference Signal), and may also be called a pilot or pilot signal depending on the applicable standard.

[0184] <The meaning of "based on"> 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."

[0185] <"First", "Second"> 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.

[0186] <Means> In the configuration of each of the above devices, the "means" may be replaced with "section", "circuit", "device", etc.

[0187] <Open format> In the present disclosure, when terms such as "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0188] <Time units such as TTI, frequency units such as RB, radio frame configuration> A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0189] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0190] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may be a time unit based on numerology.

[0191] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0192] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0193] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0194] 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. However, the definition of TTI is not limited to this.

[0195] 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.

[0196] 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.

[0197] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0198] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0199] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may also be determined based on numerology.

[0200] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0201] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0202] 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.

[0203] A Bandwidth Part (BWP) (which may also be referred to as a fractional bandwidth) may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a common reference point of the carrier. PRBs may be defined in a given BWP and numbered within that BWP.

[0204] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0205] 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."

[0206] 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.

[0207] <Maximum transmission power> 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.

[0208] <Article> 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.

[0209] <"Different"> 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." [Industrial Applicability]

[0210] One aspect of the present disclosure is useful in wireless communication systems. [Explanation of symbols]

[0211] 10. Wireless communication systems 20 NG-RAN 100 base stations (gNB) 200 User Equipment (UE) 101,202 Transmitter 102,201 Receiver 103,203 Control unit< / cli> < / sbfd>

Claims

1. a received signal receiving information regarding the use of a reference signal to suppress phase fluctuations in an uplink channel; a control unit that determines, when the information indicates non-use of the reference signal, a number of uplink data that is transform precoded and transmitted in one symbol based on a number of muted resource elements; A terminal having:

2. The control unit assumes that, when the information indicates use of the reference signal, the muted resource elements do not overlap with the resource elements occupied by the reference signal. The terminal according to claim 1 .

3. The control unit determines not to apply muting to resource elements having the reference signal when the information indicates use of the reference signal. The terminal according to claim 1 .

4. the control unit determines not to apply muting to the symbols including one or more of the reference signals if the information indicates use of the reference signals. The terminal according to claim 1 .

5. The control unit determines not to apply muting to an uplink channel using Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) when the information indicates use of the reference signal. The terminal according to claim 1 .

6. The device is receiving information regarding the use of a reference signal to suppress phase fluctuations in an uplink channel; If the information indicates non-use of the reference signal, determining the number of uplink data to be transform precoded and transmitted in one symbol based on the number of muted resource elements. Communication method.

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