Terminal, wireless communication method and base station

Abstract

A terminal according to an aspect of the present disclosure comprises: a reception unit that receives information regarding application of Doppler correction for transmission of a physical uplink shared channel (PUSCH) to one or more transmission / reception points located on a movement route; and a control unit that determines, on the basis of the information, whether to apply the Doppler correction for each of the one or more transmission / reception points. According to an aspect of the present disclosure, wireless communication performed on a mobile body can be appropriately controlled.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 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 Summary of the Invention [Problem to be solved by the invention]

[0005] In future wireless communication systems (e.g., NR), it is expected that beams transmitted from transmission points (e.g., Remote Radio Heads (RRHs)) placed along the path of a fast-moving vehicle (e.g., a train) will be used to realize wireless communication in the vehicle.

[0006] However, there has been no sufficient consideration as to how to control wireless communication in a mobile object by utilizing beams transmitted from each transmission point.

[0007] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control wireless communication in a mobile body. [Means for solving the problem]

[0008] A terminal according to an embodiment of the present disclosure includes a receiving unit that receives information regarding application of Doppler correction for transmission of a physical uplink shared channel (PUSCH) to one or more transmission / reception points arranged on a moving path, and based on the information, For each uplink Transmission Configuration Indication (TCI) state applied to the PUSCH transmission, and a control unit that determines application of the Doppler correction to each of the one or more transmission and reception points. Effect of the Invention

[0009] According to one aspect of the present disclosure, wireless communication in a mobile object can be appropriately controlled. [Brief description of the drawings]

[0010] [Figure 1] 1A and 1B are diagrams illustrating an example of communication between a mobile unit and a transmission point (eg, RRH). [Diagram 2] FIG. 2 is a diagram showing an example of a method of communicating with a transmission / reception point arranged on a moving path of a moving object. [Diagram 3] FIG. 3 is a diagram showing an example of Doppler correction of DL in the HST. [Figure 4]FIG. 4 is a diagram illustrating an example of applying Doppler correction for transmission of UL signals / channels in the first embodiment. [Diagram 5] FIG. 5 illustrates an example of application of Doppler correction for transmission of UL signals / channels in the second embodiment. [Figure 6] 6A and 6B are diagrams illustrating an example of a MAC CE in the third embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (TCI, spatial relations, QCL) In NR, it is considered to control reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0012] The TCI state may represent a state that is applied to a downlink signal / channel. The equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0013] The TCI state is information on the Quasi-Co-Location (QCL) of signals / channels, and may be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or for each signal.

[0014] A QCL is an index that indicates the statistical properties of a signal / channel. For example, when a signal / channel and another signal / channel are in a QCL relationship, it may mean that it can be assumed that at least one of the following is the same (QCL with respect to at least one of the following) between these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0015] In addition, the spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be specified based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with a spatial QCL (sQCL).

[0016] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types AD may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be called QCL parameters) are as follows: QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL type B (QCL-B): Doppler shift and Doppler spread, QCL type C (QCL-C): Doppler shift and mean delay, · QCL type D (QCL-D): spatial reception parameters.

[0017] The UE's assumption that a given Control Resource Set (CORESET), channel, or reference signal is in a particular QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0018] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumptions of the signal / channel.

[0019] The TCI state may be, for example, information about the QCL of the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination of these.

[0020] In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0021] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The 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.

[0022] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0023] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0024] In addition, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0025] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may be referred to as an SS / PBCH block.

[0026] An information element of the TCI state ("TCI-state IE" of RRC) set by higher layer signaling may include one or more pieces of QCL information ("QCL-Info"). The QCL information may include at least one of information on an RS having a QCL relationship (RS relationship information) and information indicating a QCL type (QCL type information). The RS relationship information may include information such as an index of the RS (e.g., an SSB index, a Non-Zero-Power (NZP) CSI-RS resource identifier), an index of a cell in which the RS is located, an index of a Bandwidth Part (BWP) in which the RS is located, etc.

[0027] In Rel.15 NR, both the QCL type A RS and the QCL type D RS, or only the QCL type A RS, can be configured for a UE as at least one TCI state of the PDCCH and the PDSCH.

[0028] When the TRS is configured as the RS of QCL type A, unlike the demodulation reference signal (DMRS) of the PDCCH or PDSCH, the same TRS is expected to be transmitted periodically over a long period of time. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0029] A UE in which the TRS is set as a QCL type A RS in the TCI state of the DMRS of PDCCH or PDSCH can assume that the parameters of the QCL type A of the DMRS of PDCCH or PDSCH and the parameters of the QCL type A of the TRS (average delay, delay spread, etc.) are the same, and can therefore obtain the parameters of the DMRS of PDCCH or PDSCH type A (average delay, delay spread, etc.) from the measurement result of the TRS. When performing channel estimation of at least one of the PDCCH and the PDSCH, the UE can perform more accurate channel estimation by using the measurement result of the TRS.

[0030] A UE configured with a QCL type D RS can determine a UE receive beam (spatial domain receive filter, UE spatial domain receive filter) using the QCL type D RS.

[0031] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (its DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0032] (HTS) In NR, it is assumed that a beam transmitted from a transmission point (e.g., RRH) will be used to communicate with a terminal (hereinafter, also referred to as UE) included in a moving object (HTS (high speed train)) such as a fast moving train. Existing systems (e.g., Rel. 15) support communication with a moving object by transmitting a unidirectional beam from the RRH (see Figure 1A).

[0033] FIG. 1A shows a case where RRHs are installed along the moving path (or moving direction, traveling direction, traveling path) of a moving object, and a beam is formed from each RRH in the moving direction of the moving object. An RRH that forms a beam in one direction may be called a uni-directional RRH. In the example shown in FIG. 1A, the moving object receives a negative Doppler shift (-f D ) is received.

[0034] Note that, although the case where a beam is formed in the direction of travel of the moving body is shown here, this is not limited to the case, and a beam may be formed in the opposite direction to the direction of travel, or a beam may be formed in any direction regardless of the direction of travel of the moving body.

[0035] In Rel.16 and later, it is assumed that multiple (e.g., two or more) beams will be transmitted from the RRH. For example, it is assumed that beams will be formed in both the moving direction of the moving object and the opposite direction (see Figure 1B).

[0036] 1B shows a case where RRHs are installed along the moving path of a moving object, and beams are formed from each RRH in both the moving direction of the moving object and the opposite direction of the moving direction. An RRH that forms beams in multiple directions (for example, two directions) may be called a bi-directional RRH.

[0037] In the example shown in FIG. 1B, when the moving object is in the middle of two RRHs (RRH#1 and RRH#2 in this case), the signal is switched from a negative Doppler shift (Doppler offset) to a positive Doppler shift with higher power. In this case, the maximum Doppler shift change range that requires correction is -f D From +f D This is double the change compared to the unidirectional RRH.

[0038] In the future, it is desirable to support communications in mobile objects moving at speeds of 500 km / h or more by utilizing multiple RRHs arranged along the moving path (without the assistance of a macro cell).

[0039] 2 shows an example of a case where a moving object communicates with a transmitting / receiving point (RRH#1 in this case) arranged on the moving path. Here, a case where the RRH transmits DL signals / DL channels using multiple beams is shown. The transmitting point may be at least one of a unidirectional RRH and a bidirectional RRH.

[0040] In the example of Fig. 2, each beam transmitted from the RRH corresponds to one TCI state. Each TCI state may have a TCI state period (TCI#X period). In the example of Fig. 2, a UE included in the HST receives one or more SSB / CSI-RS in one period in which a TCI state applies.

[0041] In Rel. 17 and later, it has been considered to perform Doppler shift correction (which may also be called Doppler Compensation or Pre-Doppler Compensation) in transmission of a downlink (DL) signal / channel from a TRP to a UE in an HST. By performing Doppler correction in advance when transmitting a DL signal / channel to a UE, the TRP can reduce the effect of Doppler shift when the UE receives the DL signal / channel. In this disclosure, the correction of Doppler shift for transmitting a DL signal / channel may be called DL Doppler correction.

[0042] In Rel. 17 and beyond, it is considered that the UE will support the following variants A, B, C, and E when the same DL DMRS port is associated with multiple (e.g., two) TCI states as a source reference signal: Variation A: one TCI state is related to {average delay, delay spread} and another TCI state is related to {average delay, delay spread, Doppler shift, Doppler spread}; Variation B: one TCI state is related to {mean delay, delay spread} and another TCI state is related to {Doppler shift, Doppler spread}. Variation C: one TCI state is related to {delay spread} and another TCI state is related to {average delay, delay spread, Doppler shift, Doppler spread}; · Variation E: Multiple (2) TCI conditions are associated with {mean delay, delay spread, Doppler shift, Doppler spread}.

[0043] Fig. 3 is a diagram showing an example of Doppler correction of DL in an HST. In the example shown in Fig. 3, RRHs #0-#7 are arranged along the movement path of the HST. RRHs #0-#3 and RRHs #4-#7 are connected to baseband units (BBUs) #0 and #1, respectively. Each RRH is a bidirectional RRH, and forms beams using each transmission / reception point (TRP) in both the traveling direction of the movement path and the opposite direction to the traveling direction.

[0044] In the example shown in Figure 3, the TRP that forms a beam in the direction of travel of the moving path and the TRP that forms a beam in the opposite direction of the moving path transmit DL signals / channels to the UE in the HST after performing Doppler correction. When the UE receives a signal / channel transmitted from TRP#2n-1 (n is an integer equal to or greater than 0), the UE receives a negative Doppler shift (-f in Figure 3). D ) occurs. In addition, when the UE receives a signal / channel transmitted from TRP#2n (n is an integer equal to or greater than 0), a positive Doppler shift (+f D 3, TRP#2n-1 performs positive Doppler correction, and TRP#2n performs negative Doppler correction to reduce the effect of the Doppler shift when the UE receives a signal / channel.

[0045] Furthermore, in Rel. 17 and later, when performing the above-mentioned Doppler correction, it is being considered to make the Channel State Information Reference Signal (CSI-RS) / Tracking CSI-RS (also called Tracking Reference Signal (TRS)) transmitted from each TRP (a TRP that forms a beam in the direction of travel of the moving path and a TRP that forms a beam in the opposite direction to the direction of travel of the moving path) independent (different) CSI-RS / TRS (which may be called distributed CSI-RS / TRS).

[0046] If the CSI-RS / TRS transmitted from each TRP is a common CSI-RS / TRS, the Doppler shift occurs frequently, which may impair the reliability of communication. Therefore, the use of distributed CSI-RS / TRS is being considered to ensure the reliability of communication.

[0047] However, there has been insufficient consideration of Doppler compensation for UE transmission of UL signals / channels, which may lead to reduced reliability of communications and may limit the increase in communication throughput.

[0048] Specifically, if Doppler correction is not performed on UL transmissions by the UE (e.g., PUSCH / PUCCH), the signals / channels received by the TRP in the direction of travel of the UE moving via the HST and the TRP in the opposite direction to the direction of travel will have different Doppler shifts.

[0049] In this case, if the UE performs different UL transmissions for each of the TRPs in the direction of travel and the TRPs in the direction of travel and the opposite direction, or if each of the TRPs in the direction of travel and the TRPs in the direction of travel and the opposite direction performs UL transmission reception processing (e.g., decoding, demodulation) independently, the effect of the Doppler shift can be ignored without performing Doppler correction for the UL. However, if the TRPs in the direction of travel and the TRPs in the direction of travel and the opposite direction cooperate with each other to perform UL transmissions in a composite manner for any transmission mode of the UE, the Doppler shift in each TRP may adversely affect the composite processing in each TRP.

[0050] Therefore, the present inventors have come up with a method for appropriately performing Doppler correction when a UE in a moving body transmits an UL signal / channel.

[0051] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The configurations described in each embodiment may be applied alone or in combination.

[0052] In the present disclosure, TCI state, TCI state or QCL assumption, TCI state duration, spatial relation, UL TCI state, UL TCI, UL transmitting entity, UE panel, panel, port, TRP, QCL assumption, QCL duration, QCL parameter, spatial domain filter, beam, precoding, precoder, a specific antenna port (e.g., a DeModulation Reference Signal (DMRS) port), a specific antenna port group (e.g., a DMRS port group), a specific group (e.g., a Code Division Multiplexing (CDM) group, a specific reference signal group, a CORESET group, a panel group, a beam group, a spatial relation group, a PUCCH group, a CORESET pool, and the like may be read as interchangeable.

[0053] In the present disclosure, the terms index, ID, indicator, and resource ID may be interchangeable.

[0054] In the present disclosure, a moving object may be anything that moves at a predetermined speed or faster, and may be, for example, a train, a car, a motorcycle, a ship, etc. Furthermore, communication between a UE and a transmission point (e.g., an RRH) included in the moving object may be performed directly between the UE and the transmission point, or may be performed between the UE and the transmission / reception point via the moving object (e.g., an antenna installed on the moving object).

[0055] In addition, in this disclosure, a UE included in a mobile unit (HST) may simply be referred to as a UE.

[0056] In addition, in the present disclosure, “A / B” may be read as at least one of A and B, and “A / B / C” may be read as at least one of A, B, and C.

[0057] In addition, in the present disclosure, Doppler shift, Doppler frequency shift, Doppler correction, Doppler spread, Doppler shift value, Doppler correction value, Doppler frequency offset, Doppler offset, Doppler frequency offset value, Doppler offset value, etc. may be read as interchangeable. In addition, in the present disclosure, Doppler correction used for transmitting a UL signal / channel may be simply referred to as Doppler correction or may be referred to as UL Doppler correction.

[0058] Furthermore, in the present disclosure, information that sets / instructs whether or not to apply Doppler correction for transmitting a UL signal / channel may be information that sets / instructs application of the Doppler correction, or information that enables application of the Doppler correction. Furthermore, information that sets / instructs whether or not to apply Doppler correction for transmitting a UL signal / channel may be information that sets / instructs enabling or disabling application of the Doppler correction. Furthermore, information that sets / instructs whether or not to apply Doppler correction for transmitting a UL signal / channel may be referred to as information regarding the Doppler correction.

[0059] In the following, each embodiment of the present disclosure will be described using PUSCH as an example of an UL signal / channel to which Doppler correction is applied, but each embodiment of the present disclosure can also be applied as appropriate to UL signals / channels other than PUSCH (e.g., PUCCH).

[0060] Furthermore, in each embodiment of the present disclosure below, each RRH may have two or more TRPs, and the transmission / reception directions of signals / channels (which may be called beamforming directions) may be two or more directions.

[0061] In addition, in the present disclosure, the UL DMRS for UL signals / channels (e.g., PUSCH / PUCCH) associated with multiple (e.g., two) TCI states may be of a QCL type defined in Rel. 17 or later, and a TCI state setting for multiple TCI states associated with the above DL DMRS may be applied.

[0062] (Wireless communication method) <First embodiment> In a first embodiment, the UE may perform Doppler correction for transmission of an uplink (UL) channel / signal (eg, PUSCH) in a serving cell.

[0063] The UE may receive a setting (setting information) / instruction (instruction information) for performing the Doppler correction from the network (NW). The setting information / instruction information may be set / notified / instructed to the UE by at least one of higher layer signaling (e.g., RRC signaling / MAC CE) and physical layer signaling (e.g., a specific field included in DCI). The setting information / instruction information may be information for setting / instructing whether or not to apply Doppler correction to PUSCH transmission corresponding to one or more beams / spatial relationships / UL TCI / UE panels / TRPs.

[0064] <<Embodiment 1-1>> In embodiment 1-1, the UE may determine / judge whether to apply Doppler correction based on the implementation of the UE. In embodiment 1-1, the UE may estimate the value of Doppler correction based on a reference signal (e.g., DL TRS) corresponding to a beam / spatial relationship / UL TCI / UE panel / TRP.

[0065] For example, the UE may determine to apply UL Doppler correction and determine the beam / spatial relationship / UL TCI / UE panel / TRP to which the UL Doppler correction is applied based on the implementation of the UE (embodiment 1-1-0).

[0066] Also, for example, the UE may receive configuration information / instruction information regarding whether to apply Doppler correction to one or more specific beams / spatial relationships / UL TCIs / UE panels / TRPs, and then the UE may determine to apply Doppler correction to the instructed beams / spatial relationships / UL TCIs / UE panels / TRPs based on the implementation of the UE (embodiment 1-1-1).

[0067] Also, for example, the UE may be applied with Doppler correction applied to DL signals / channels defined in Rel. 16. In this case, the UE may be configured to measure the Doppler shift of the DL signals / channels and report the measured Doppler shift to the NW (embodiment 1-1-2).

[0068] In embodiment 1-1-2, the measured Doppler shift may be one value per BWP / CC / band / UE, or one or more values ​​corresponding to each beam forming direction (e.g., the direction of travel, the direction opposite to the direction of travel) / UE panel / TRP.

[0069] In embodiment 1-1-2, the UE may be instructed / configured to apply Doppler compensation to the UL signal / channel, and may determine the value of the Doppler compensation for the UL signal / channel based on the value of the Doppler shift reported by the UE (e.g., the most recent reported value).

[0070] In embodiment 1-1-2, a single value (e.g., f offset ), the UE may report the measured Doppler shift value as -f, where the Doppler correction value to be applied to the UL signal / channel transmitted for a certain beamforming direction (e.g., heading) / UE panel (e.g., heading side panel) / TRP (e.g., heading side TRP) is -f offset At this time, the UE may determine that the value of Doppler correction applied to the UL signal / channel transmitted to another beamforming direction (e.g., the direction opposite to the traveling direction) / UE panel (e.g., a panel on the opposite side to the traveling direction) / TRP (e.g., a TRP on the opposite side to the traveling direction) is +f offset It may be determined that this is the case (embodiment 1-1-2-1).

[0071] In addition, in the embodiment 1-1-2, multiple (for example, two) values ​​(for example, f offset_1 and f offset_2 ), the UE may report the measured Doppler shift value as +f, where the Doppler correction value to be applied to the UL signal / channel transmitted for a certain beamforming direction (e.g., heading) / UE panel (e.g., heading side panel) / TRP (e.g., heading side TRP) is +f. offset_1At this time, the UE may determine that the value of Doppler correction applied to the UL signal / channel transmitted to a certain beamforming direction (e.g., the direction opposite to the traveling direction) / UE panel (e.g., a panel on the opposite side to the traveling direction) / TRP (e.g., a TRP on the opposite side to the traveling direction) is +f offset_2 It may be determined that this is the case (embodiment 1-1-2-2).

[0072] Note that the Doppler shift values ​​and Doppler correction values ​​in each embodiment of the present disclosure are merely examples, and the values ​​and signs may be arbitrary.

[0073] <<Embodiment 1-2>> In embodiment 1-2, when a UE receives information that configures / instructs it to apply Doppler correction for transmission of a UL signal / channel, the UE may use the information to be instructed on the value of the Doppler correction to be applied to one or more beams / spatial relationships / UL TCIs / UE panels / TRPs.

[0074] The information may be commonly set / instructed for multiple serving cells used to transmit UL signals / channels, or may be set / instructed independently for each different serving cell. The UE may use the information to receive at least one of whether or not UL Doppler correction is applied and the value of the UL Doppler correction. After receiving the information, the UE may apply the estimated / instructed Doppler correction value to the UL signal / channel (e.g., PUSCH (PUSCH including DMRS / data signal)).

[0075] Fig. 4 is a diagram showing an example of application of Doppler correction for transmission of UL signals / channels in the first embodiment. The configuration of the RRH in Fig. 4 is the same as that in Fig. 3. Note that, for simplicity, the BBU, the moving path, and the moving object are not shown in Fig. 4.

[0076] In the example shown in FIG. 4, when the UE uses the UE panel #1 to transmit a UL signal / channel to a TRP (TRP #2n-1) on the opposite side of the traveling direction, the UEoffset In addition, when the UE transmits a UL signal / channel to the TRP (TRP#2n) in the direction of travel using the UE panel #2, the UE applies a Doppler correction value of -f offset By applying these Doppler corrections, each TRP is calculated as -f D and +f D The Doppler shift can be reduced.

[0077] According to the first embodiment described above, it is possible to appropriately determine the Doppler correction (value) to be applied to the UL signal / channel.

[0078] <Second embodiment> In the second embodiment, a case will be described in which configuration information for configuring application of Doppler correction for transmission of UL signals / channels is notified to the UE via RRC signaling.

[0079] <<Embodiment 2-1>> The UE may be configured via RRC signaling to apply or not apply Doppler correction for transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell.

[0080] Fig. 5 is a diagram showing an example of application of Doppler compensation for transmission of UL signals / channels in the second embodiment. In the example shown in Fig. 5, the RRH has six TRPs, and transmits and receives signals / channels using different TCI states (TCI#0-#5) based on the geographical domain (physical location) of the UE.

[0081] In embodiment 2-1, for example, the UE may be configured, via RRC signaling, as to whether or not to apply Doppler compensation for the transmission of UL signals / channels for a specific TCI state. For example, the UE may be configured, via RRC signaling, to apply Doppler compensation for the transmission of UL signals / channels for TCI#0, TCI#1, and TCI#2, and not to apply Doppler compensation for the transmission of UL signals / channels for TCI#3, TCI#4, and TCI#5.

[0082] <<Embodiment 2-2>> The UE may be configured via RRC signaling whether to apply Doppler correction for transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell, and the Doppler correction value to apply.

[0083] In the present disclosure, the Doppler correction value to be applied may be set / instructed to the UE using at least one of higher layer signaling (e.g., RRC signaling) and physical layer signaling (e.g., DCI). In addition, the absolute value of the Doppler correction value to be applied may be notified to the UE, or information (index) for notifying the value to be applied from a plurality of values ​​(candidate values) may be notified to the UE. In addition, the UL Doppler correction value applied by the UE may be a correction value calculated from the DL Doppler correction value, may be determined by the UE based on the moving speed of the UE itself, or may be notified to the UE by another terminal (e.g., a moving object carrying the UE).

[0084] The embodiment 2-2 will be described with reference to Fig. 5. In the example shown in Fig. 5, for example, the UE may be notified of the application of Doppler correction for the transmission of UL signals / channels to TCI#0, TCI#1, and TCI#2, and the Doppler correction values ​​corresponding to each TCI state, via RRC signaling. Also, the Doppler correction values ​​indicating that Doppler correction for the transmission of UL signals / channels is not applied to TCI#3, TCI#4, and TCI#5 may be notified. For example, the application of Doppler correction value #a, Doppler correction value #b, and Doppler correction value #c to TCI#0, TCI#1, and TCI#2, respectively, may be notified, and the Doppler correction value #d indicating that Doppler correction is not applied to TCI#3, TCI#4, and TCI#5, respectively, may be notified. The Doppler correction value #d may be a specific value (for example, 0).

[0085] According to the second embodiment described above, application of Doppler correction for transmission of UL signals / channels can be appropriately controlled using RRC signaling.

[0086] <Third embodiment> In the third embodiment, a case will be described in which configuration information for setting application of Doppler correction for transmission of UL signals / channels is notified to the UE via the MAC CE.

[0087] <<Embodiment 3-1>> The UE may use the MAC CE to configure whether or not to apply Doppler correction for transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell.

[0088] In embodiment 3-1, the MAC CE used to determine whether to apply Doppler correction for the transmission of a UL signal / channel may include a plurality of specific fields. The plurality of specific fields may include at least one of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), a field indicating a spatial relationship / TCI state (spatial relationship field / TCI state field), and an indication field of Doppler correction for the transmission of a UL signal / channel for each spatial relationship / TCI state field (embodiment 3-1-1). The indication field of Doppler correction may be a specific number of bits (e.g., 1 bit).

[0089] Fig. 6A is a diagram showing an example of a MAC CE in the third embodiment. The MAC CE in the example shown in Fig. 6A includes a serving cell ID field, a BWP ID field, a TCI state field (TCI state #1-#i (i is a positive integer)), a Doppler correction indication field (denoted as DC_1-i) corresponding to the TCI state, and a reserved bit (denoted as R). DC_i is a Doppler correction indication field corresponding to TCI state #i. The UE may determine whether to apply Doppler correction to the corresponding TCI state based on the Doppler correction indication field.

[0090] Also, in embodiment 3-1, the MAC CE may include at least one of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), and a Doppler correction indication field for transmitting a UL signal / channel corresponding to each of the TCI states (active TCI states) (embodiment 3-1-2). When the Doppler correction indication field indicates a first value (e.g., 0), the UE may not apply Doppler correction to the active TCI state corresponding to the field indicating the first value. Also, when the Doppler correction indication field indicates a second value (e.g., 1), the UE may apply Doppler correction to the active TCI state corresponding to the field indicating the second value.

[0091] Figure 6B is a diagram showing another example of a MAC CE in the third embodiment. The MAC CE in the example shown in Figure 6B includes a serving cell ID field, a BWP ID field, a Doppler correction indication field (denoted as T0-T127) corresponding to a TCI state, and a reserved bit (denoted as R). Ti (i is a positive integer) is a Doppler correction indication field corresponding to TCI state #i. The UE may determine whether to apply Doppler correction to the corresponding TCI state based on the value of the Doppler correction indication field.

[0092] In the example shown in FIG. 6B, the MAC CE may not include inactive TCI states, but may include only active TCI states. When the MAC CE includes only active TCI states, the TCI state #i may indicate the i-th active TCI state. When the MAC CE includes only active TCI states, the overhead of notification to the UE can be reduced.

[0093] <<Embodiment 3-2>> The UE may be configured via RRC signaling whether to apply Doppler correction for transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell, and the Doppler correction value to apply.

[0094] In embodiment 3-2, the MAC CE used to determine whether to apply Doppler correction for transmission of a UL signal / channel may include a plurality of specific fields. The plurality of specific fields may include at least one of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), a field indicating a spatial relationship / TCI state (spatial relationship field / TCI state field), and a field for indicating a value of Doppler correction for transmission of a UL signal / channel for each spatial relationship / TCI state field (embodiment 3-2-1). The field for indicating the Doppler correction value may be a specific number of bits (e.g., x bits (x is an integer)), may be based on the number of Doppler correction values ​​supported by the UE, or may include 0.

[0095] The field for indicating the Doppler correction value may indicate an absolute correction value or a reference value (relative value, offset) based on a specific correction value, which may be, for example, the first non-zero correction value included in the MAC CE.

[0096] Also, in embodiment 3-2, the MAC CE may include at least one of a field indicating a serving cell (serving cell ID field), a field indicating a BWP (BWP ID field), and a field for indicating a Doppler correction value for transmitting a UL signal / channel corresponding to each of the TCI states (active TCI states) (embodiment 3-1-2). When the Doppler correction indication field indicates a first value (e.g., 0), the UE may not apply Doppler correction to the active TCI state corresponding to the field indicating the first value. Also, when the Doppler correction indication field indicates a second value (e.g., 1), the UE may apply Doppler correction to the active TCI state corresponding to the field indicating the second value.

[0097] According to the third embodiment described above, it is possible to appropriately control the application of Doppler correction for transmitting UL signals / channels using MAC CE.

[0098] <Fourth embodiment> In the fourth embodiment, a case will be described in which instruction information for instructing the UE to apply Doppler compensation for transmitting a UL signal / channel is notified to the UE by using DCI.

[0099] <<Embodiment 4-1>> The UE may be instructed whether to apply Doppler compensation for transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell using a specific field included in the DCI, which may be included when specific higher layer signaling (e.g., RRC signaling) regarding Doppler compensation for transmission of UL signals / channels is configured.

[0100] The DCI including the specific field may be a DCI (for example, DCI format 1_0 / 1_1) that schedules the transmission of a UL signal / channel (for example, PUSCH). In addition, the DCI including the specific field may be a DCI format other than the DCI that schedules the transmission of a UL signal / channel (for example, PUSCH), or may be a newly defined DCI format that assumes the operation of the HST.

[0101] The particular field may have a particular number of bits (e.g., 1). If the UE receives the particular field with a first codepoint (e.g., 0), it may determine not to apply UL Doppler compensation. Also, if the UE receives the particular field with a second codepoint (e.g., 1), it may determine to apply UL Doppler compensation.

[0102] The embodiment 4-1 will also be described with reference to Fig. 5 as an example. In the embodiment 4-1, for example, a specific field included in the DCI may be used to set for the UE whether or not to apply Doppler compensation for transmission of a UL signal / channel for a specific TCI state. For example, when the value (code point) of the specific field indicates a first value (e.g., 0), the UE may determine not to apply Doppler compensation, and when the value (code point) of the specific field indicates a second value (e.g., 1), the UE may determine to apply Doppler compensation.

[0103] In the example shown in FIG. 5, for example, a UE may be instructed to apply Doppler compensation for the transmission of an UL signal / channel to TCI#1 for PUSCH transmission, and not to apply Doppler compensation for the transmission of an UL signal / channel to TCI#3 for PUSCH transmission, using a specific field included in the DCI.

[0104] <<Embodiment 4-2>> The UE may be instructed whether to apply Doppler correction for the transmission of UL signals / channels for a particular beam / spatial relationship / UL TCI / UE panel / TRP in a serving cell and the value of the Doppler correction using a specific field included in the DCI, which may be included in the DCI when a specific higher layer signaling (e.g., RRC signaling) regarding Doppler correction for the transmission of UL signals / channels is configured.

[0105] The DCI including the specific field may be a DCI (e.g., DCI format 1_0 / 1_1) that schedules the transmission of a UL signal / channel (e.g., PUSCH). Also, the DCI including the specific field may be a DCI format other than the DCI that schedules the transmission of a UL signal / channel (e.g., PUSCH).

[0106] The specific field may have a specific number of bits (e.g., 2). When the UE receives the specific field with a specific code point (e.g., 00), the UE may determine not to apply UL Doppler compensation. When the UE receives the specific field with a code point other than the specific code point (e.g., 01, 10, 11), the UE may determine to apply UL Doppler compensation. In this case, the UE may determine a candidate value corresponding to a code point indicated by DCI from multiple Doppler compensation candidate values ​​preset in higher layer signaling, and apply the candidate value to the transmission of the UL signal / channel.

[0107] The embodiment 4-2 will also be described with reference to Fig. 5. In the embodiment 4-2, for example, a specific field included in the DCI may be used to instruct the UE whether or not to apply Doppler compensation for transmission of a UL signal / channel for a specific TCI state and a Doppler compensation value corresponding to each TCI state. For example, the UE may determine whether or not to apply the Doppler compensation based on the instructed Doppler compensation value corresponding to each TCI state.

[0108] In the example shown in Fig. 5, for example, a field value (code point, for example, 10) indicating a Doppler correction value for the transmission of a UL signal / channel may be notified to the UE for TCI#1 for PUSCH transmission using a specific field included in the DCI, and the UE may determine the Doppler correction value to be applied based on the value of the field. Also, a field value (code point, for example, 00) indicating that Doppler correction for the transmission of a UL signal / channel is not applied to TCI#3 for PUSCH transmission may be notified to the UE, and the UE may determine that Doppler correction is not to be applied to TCI#3 based on the value of the field.

[0109] The field for indicating the Doppler correction value may indicate an absolute correction value, or may indicate a reference value (relative value, offset) based on a specific correction value.

[0110] According to the fourth embodiment described above, it is possible to appropriately control the application of Doppler correction for transmitting UL signals / channels using DCI.

[0111] <Fifth embodiment> In the fifth embodiment, a UE capability regarding application of Doppler compensation for transmission of a UL signal / channel will be described. The UE may report (transmit) to the NW whether it has the capability.

[0112] The UE capability for application of Doppler correction for transmission of UL signals / channels may be defined as whether Doppler correction for PUSCH / PUCCH corresponding to one beam / spatial relationship / UL TCI / UE panel / TRP is supported or not.

[0113] In addition, the UE capability for application of Doppler correction for transmission of UL signals / channels may be defined as whether or not Doppler correction based on configuration / instruction using RRC signaling / MAC CE / DCI is supported for PUSCH / PUCCH corresponding to one beam / spatial relationship / UL TCI / UE panel / TRP.

[0114] Also, the UE capability regarding application of Doppler correction for transmission of UL signals / channels may be defined as whether Doppler correction for PUSCH / PUCCH corresponding to one beam / spatial relationship / UL TCI / UE panel / TRP for multiple serving cells is supported jointly / independently or not.

[0115] Each embodiment of the present disclosure may be applied under at least one of the following conditions: when the UE reports the UE capability corresponding to the at least one of the above to the NW, and when the at least one UE capability is set / activated / instructed to the UE by higher layer signaling. Each embodiment of the present disclosure may be applied when a specific higher layer parameter is set / activated / instructed to the UE.

[0116] (Wireless communication systems) A 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 of these methods.

[0117] 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0118] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of 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)), and the like.

[0119] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the 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.

[0120] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0121] 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 arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 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 a base station 10.

[0122] 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 (CC) and dual connectivity (DC).

[0123] 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 above 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 frequency band higher than FR2.

[0124] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0125] A plurality of base stations (e.g., RRH) 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and base station 12 corresponding to a relay station (relay) may be called an IAB node.

[0126] 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 at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0127] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0128] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), 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), etc. may be used.

[0129] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0130] 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 a downlink channel.

[0131] In addition, 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)), etc. may be used as an uplink channel.

[0132] 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).

[0133] 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 of at least one of the PDSCH and the PUSCH.

[0134] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0135] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search 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 multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0136] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0137] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0138] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0139] 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.

[0140] 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 the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0141] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0142] (base station) 8 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 one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0143] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0144] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with 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.

[0145] 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 transmission and reception unit 120, the transmission and reception 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 transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0146] 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.

[0147] 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, an RF unit 122, and a measurement unit 123.

[0148] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0149] 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.

[0150] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0151] The transceiver 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.

[0152] The transceiver 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.

[0153] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0154] 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 signal received by the transceiver antenna .

[0155] 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.

[0156] 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.

[0157] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0158] 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.

[0159] The transceiver 120 may transmit information regarding application of Doppler compensation for transmission of a Physical Uplink Shared Channel (PUSCH) to one or more transmission / reception points arranged on a moving path. The controller 110 may control reception of the PUSCH to which the Doppler compensation has been applied based on the information (first embodiment).

[0160] (User terminal) 9 is a diagram showing an example of the configuration of a user terminal according to an 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.

[0161] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0162] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with 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.

[0163] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0164] The transmitting / receiving 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 transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0165] 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.

[0166] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0167] 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.

[0168] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0169] 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.

[0170] The transceiver 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 sequence to be transmitted, and output a baseband signal.

[0171] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0172] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0173] 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 signal received by the transceiver antenna 230.

[0174] The transceiver 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.

[0175] 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.

[0176] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0177] The transceiver unit 220 may receive information regarding application of Doppler correction for transmission of a physical uplink shared channel (PUSCH) to one or more transmission and reception points arranged on a moving path. The control unit 210 may determine application of the Doppler correction to each of the one or more transmission and reception points based on the information (first embodiment).

[0178] The information may indicate at least one of application of Doppler compensation and a Doppler compensation value for the transmission of the PUSCH, and the transceiver unit 220 may receive the information via radio resource control signaling (second embodiment).

[0179] The information may indicate at least one of application of Doppler compensation and a Doppler compensation value for the transmission of the PUSCH, and the transceiver unit 220 may receive the information via a media access control control element (third embodiment).

[0180] The information may indicate at least one of application of Doppler compensation and a Doppler compensation value for transmitting the PUSCH, and the transceiver unit 220 may receive the information by using downlink control information (fourth embodiment).

[0181] (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. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0182] 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, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0183] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 10 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned 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.

[0184] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read 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.

[0185] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0186] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0187] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with 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), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0188] Moreover, the processor 1001 reads out 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 according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0189] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0190] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, 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.

[0191] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order 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.

[0192] 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 performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0193] In addition, 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.

[0194] 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), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0195] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this 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 read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0196] 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.

[0197] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0198] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0199] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed 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.

[0200] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for 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 read as interchangeable with each other.

[0201] For example, one subframe may be called a 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 the 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.

[0202] Here, TTI refers to, for example, the minimum 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.

[0203] 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) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0204] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0205] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0206] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 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.

[0207] 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 the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0208] 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 one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0209] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0210] 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.

[0211] 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 numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0212] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0213] 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 replaced with "BWP".

[0214] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols 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, and other configurations can be changed in various ways.

[0215] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0216] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas 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 limiting in any way.

[0217] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the 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.

[0218] 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 a plurality of network nodes.

[0219] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0220] 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.

[0221] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0222] 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).

[0223] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0224] 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.

[0225] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the 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, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0226] 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).

[0227] In this 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," and the like may be used interchangeably.

[0228] In this 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. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0229] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0230] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0231] 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.

[0232] 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. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (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 include a device that does not necessarily move during communication operation. 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.

[0233] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of 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, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0234] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0235] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0236] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered 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.

[0237] Each aspect / embodiment described in the present disclosure may be applied to a system using 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), 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 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication method, or a next-generation system extended based on these. In addition, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

[0238] 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."

[0239] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure 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 precede the second element in some way.

[0240] 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, and the like.

[0241] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0242] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0243] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0244] 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 the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0245] 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, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0246] 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."

[0247] 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." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0248] In this disclosure, where articles have been 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.

[0249] 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 as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiver that receives information regarding application of Doppler correction for a Physical Uplink Shared Channel (PUSCH) transmission for one or more transmission / reception points located on a moving path; A terminal having a control unit that determines application of the Doppler correction to each of the one or more transmission and reception points for each uplink Transmission Configuration Indication (TCI) state applied to the PUSCH transmission based on the information.

2. The information indicates at least one of application of Doppler correction and a Doppler correction value for the transmission of the PUSCH, The terminal of claim 1 , wherein the receiver receives the information via radio resource control signaling.

3. The information indicates at least one of application of Doppler correction and a Doppler correction value for the transmission of the PUSCH, The terminal of claim 1 , wherein the receiver receives the information via a media access control control element.

4. The information indicates at least one of application of Doppler correction and a Doppler correction value for the transmission of the PUSCH, The terminal according to claim 1 , wherein the receiving unit receives the information by using downlink control information.

5. receiving information regarding application of Doppler correction for a Physical Uplink Shared Channel (PUSCH) transmission for one or more transmission / reception points located on a moving path; and determining, based on the information, application of the Doppler correction to each of the one or more transmission and reception points for each uplink Transmission Configuration Indication (TCI) state applied to the PUSCH transmission.

6. A transmitter that transmits information regarding application of Doppler correction for a Physical Uplink Shared Channel (PUSCH) transmission to one or more transmission / reception points arranged on a moving path; A base station comprising: a control unit that controls reception of the PUSCH to which the Doppler correction has been applied for each uplink Transmission Configuration Indication (TCI) state applied to the PUSCH transmission based on the information.

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