Terminal, wireless communication method, base station, and system

Abstract

A terminal according to an aspect of this disclosure is characterized by comprising a receiver for receiving one set of downlink control information (DCI) for one or more physical uplink shared channels (PUSCHs) and a controller for controlling transmission of multiple PUSCHs using multiple sounding reference signal resource indicators (SRIs) or a single PUSCH using a single SRI on the basis of at least one of multiple sets of first information that are included in the DCI and indicate the SRIs. An aspect of this disclosure makes it possible to appropriately control the repetitive transmission of PUSCH even when multi-TRP is applied.

Description

Technical Field

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

Background Art

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was standardized for the purpose of further high data rates, low latency, etc. (Non-Patent Document 1). Also, for the purpose of further large capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9), LTE-Advanced (3GPP Rel. 10-14) was standardized.

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

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In 3GPP Rel.15, repeated transmission is supported for UL data channels (e.g., Physical Uplink Shared Channel (PUSCH)). The UE is controlled to transmit PUSCH over a plurality of slots (e.g., K consecutive slots) based on the repetition factor K set by the network (e.g., base station). That is, when performing repeated transmission, each PUSCH is transmitted in a different slot (e.g., in slot units).

[0006] On the other hand, since Rel.16, when performing repeated transmission of PUSCH, performing a plurality of PUSCH transmissions within one slot has been considered. That is, each PUSCH is transmitted in a unit shorter than a slot (e.g., in sub-slot units, mini-slot units).

[0007] Also, since Rel.16, dynamically switching between a single PUSCH transmission and repeated transmission of PUSCH has been considered.

[0008] Also, in NR, communication using one or more Transmission / Reception Points (TRPs) (multi-TRP) has been considered.

[0009] However, in the existing NR specifications, how to control the repeated transmission of PUSCH in multi-panel / TRP has not been sufficiently studied. If the repeated transmission of PUSCH in multi-TRP is not properly performed, there is a risk of throughput degradation or communication quality deterioration.

[0010] Therefore, one object of the present disclosure is to provide a terminal and a wireless communication method that can appropriately control PUSCH repeated transmission 、 base station and system as one of the purposes.

Means for Solving the Problem

[0011] A terminal according to one aspect of the present disclosure including at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a second SRI field, and a specific field indicating the application of either a single SRI field or a plurality of SRI fields downlink control information (D C I) and a receiving unit that receives at least one of the first SRI field and the second SRI field, and the specific field Based on, a plurality of a physical uplink shared channel associated with an SRS resource set ( PUSCH ) repetition, and single associated with an SRS resource set PUSCH either repetition transmission of judgment and a control unit that performs and the PUSCH repetition associated with the plurality of SRS resource sets applies sequential mapping It is characterized by that.

Advantages of the Invention

[0012] According to one aspect of the present disclosure, even when multi-TRP is applied, PUSCH repeated transmission can be appropriately controlled.

Brief Description of the Drawings

[0013]

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Mode for Carrying Out the Invention

[0014] (Repeated Transmission) In Rel.15, repeated transmission is supported in data transmission. For example, a base station (Network (NW), gNB) repeats the transmission of DL data (e.g., Physical Downlink Shared Channel (PDSCH)) a predetermined number of times. Alternatively, a UE repeats the transmission of UL data (e.g., Physical Uplink Shared Channel (PUSCH)) a predetermined number of times.

[0015] FIG. 1A is a diagram showing an example of repeated transmission of PUSCH. FIG. 1A shows an example in which a predetermined number of repeated PUSCHs are scheduled by a single Downlink Control Information (DCI). The number of repetitions is also referred to as a repetition factor K or an aggregation factor K.

[0016] In FIG. 1A, the repetition factor K = 4, but the value of K is not limited to this. Also, the nth repetition may also be referred to as the nth transmission occasion, etc., and may be identified by a repetition index k (0 ≦ k ≦ K - 1). Further, FIG. 1A shows repeated transmission of a PUSCH dynamically scheduled by DCI (e.g., a dynamic grant-based PUSCH), but it may also be applied to repeated transmission of a configured grant-based PUSCH.

[0017] For example, in FIG. 1A, the UE quasi-statically receives information indicating the repetition factor K (e.g., aggregationFactorUL or aggregationFactorDL) by upper layer signaling. Here, the upper layer signaling may be any one of, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0018] MAC signaling may use, for example, a MAC control element (MAC CE), a MAC protocol data unit (MAC PDU), etc. Broadcast information may be, for example, a master information block (MIB), a system information block (SIB), remaining minimum system information (RMSI), etc.

[0019] Based on at least one of the following field values (or the information indicated by the field value) in the DCI, the UE controls the reception process (for example, at least one of reception, demapping, demodulation, and decoding) or the transmission process (for example, at least one of transmission, mapping, modulation, and coding) of the PDSCH in K consecutive slots: ·Allocation of time domain resources (for example, start symbol, number of symbols in each slot, etc.) ·Allocation of frequency domain resources (for example, a predetermined number of resource blocks (RBs), a predetermined number of resource block groups (RBGs)) ·Modulation and coding scheme (MCS) index ·Configuration of the demodulation reference signal (DMRS) for the PUSCH ·Spatial relation information of the PUSCH, or the state (TCI state) of the transmission configuration indication (TCI)

[0020] The same symbol assignment may be applied among K consecutive slots. FIG. 1A shows a case where PUSCH in each slot is assigned to a predetermined number of symbols starting from the beginning of the slot. The same symbol assignment among slots may be determined as described in the above time domain resource assignment.

[0021] For example, the UE may determine the symbol assignment in each slot based on the start symbol S and the number of symbols L (e.g., Start and Length Indicator (SLIV)) determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI. Note that the UE may determine the first slot based on the K2 information determined based on the value m of a predetermined field (e.g., TDRA field) of the DCI.

[0022] On the other hand, among the K consecutive slots, the redundancy version (RV) applied to the TB based on the same data may be the same, or at least part of it may be different. For example, the RV applied to the TB in the nth slot (transmission opportunity, repetition) may be determined based on the value of a predetermined field (e.g., RV field) in the DCI.

[0023] If the resources assigned in K consecutive slots differ in communication direction in at least one symbol in UL, DL, or Flexible of each slot specified by at least one of the uplink-downlink communication direction indication information for TDD control (e.g., "TDD-UL-DL-ConfigCommon", "TDD-UL-DL-ConfigDedicated" in RRC IE) and the slot format indicator of the DCI (e.g., DCI format 2_0), the resources of the slot including the symbol may not be transmitted (or received).

[0024] In Rel.15, as shown in Fig. 1A, PUSCH is repeatedly transmitted over multiple slots (in slot units), while in and after Rel.16, it is assumed that PUSCH is repeatedly transmitted in units shorter than a slot (e.g., sub - slot units, mini - slot units, or units of a predetermined number of symbols) (see Fig. 1B).

[0025] In Fig. 1B, the repetition factor K = 4, but the value of K is not limited to this. Also, the n - th repetition is also called the n - th transmission occasion, etc., and may be identified by the repetition index k (0 ≦ k ≦ K - 1). Further, Fig. 1B shows the repeated transmission of PUSCH dynamically scheduled by DCI (e.g., dynamic grant - based PUSCH), but it may also be applied to the repeated transmission of configured grant - based PUSCH.

[0026] The UE may determine the symbol allocation for PUSCH transmission (e.g., PUSCH with k = 0) in a predetermined slot based on the start symbol S and the number of symbols L (e.g., StartSymbol and length) determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI of PUSCH. Note that the UE may also determine a predetermined slot based on the Ks information determined based on the value m of a predetermined field (e.g., TDRA field) of the DCI.

[0027] The UE may dynamically receive information indicating the repetition factor K (e.g., numberofrepetitions) by downlink control information. The repetition factor may be determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI. For example, a table defining the correspondence between the bit value notified by the DCI, the repetition factor K, the start symbol S, and the number of symbols L may be supported.

[0028] The slot-based repeated transmission shown in Fig. 1A may be referred to as repeated transmission type A (e.g., PUSCH repetition Type A), and the subslot-based repeated transmission shown in Fig. 1B may be referred to as repeated transmission type B (e.g., PUSCH repetition Type B).

[0029] For the UE, the application of at least one of repeated transmission type A and repeated transmission type B may be configured. For example, the repeated transmission type applied by the UE may be notified from the base station to the UE by upper layer signaling (e.g., PUSCHRepTypeIndicator).

[0030] For each DCI format that schedules PUSCH, either repeated transmission type A or repeated transmission type B may be configured for the UE.

[0031] For example, for the first DCI format (e.g., DCI format 0_1), when upper layer signaling (e.g., PUSCHRepTypeIndicator-AorDCIFormat0_1) is configured for repeated transmission type B (e.g., PUSCH-RepTypeB), the UE applies repeated transmission type B for the PUSCH repeated transmission scheduled by the first DCI format. Otherwise (e.g., when PUSCH-RepTypeB is not configured or PUSCH-RepTypA is configured), the UE applies repeated transmission type A for the PUSCH repeated transmission scheduled by the first DCI format.

[0032] Also, from Rel. 16 onwards, a dynamic switch between a single PUSCH transmission and repeated transmission of PUSCH is being considered.

[0033] When upper layer parameters related to the time domain allocation of PUSCH (e.g., pusch-TimeDomainAllocationListDCI-0-1-r16 or pusch-TimeDomainAllocationListDCI-0-2-r16) are configured for a UE, the number of repetitions (e.g., 1, 2, 3, 4, 7, 8, 12, or 16) of the PUSCH may be configured by a parameter related to the number of repetitions of the PUSCH (e.g., numberOfRepetitions-r16) included in the upper layer parameter. The UE may determine the number of repetitions of the PUSCH scheduled by the DCI based on the time domain resource allocation field of the DCI. When the number of repetitions is configured / specified as 1, the UE may perform a single PUSCH transmission.

[0034] (Invalid symbol pattern) When applying repetition transmission type B for PUSCH transmission, it is also considered to notify the UE of information on symbols (or symbol patterns) unavailable for PUSCH transmission. The symbol pattern unavailable for PUSCH transmission may be called an invalid symbol pattern, Invalid symbol pattern, an invalid symbol pattern, etc.

[0035] It is considered to notify the invalid symbol pattern using at least one of upper layer signaling and DCI. The DCI may be a predetermined DCI format (e.g., at least one of DCI format 0_1 and 0_2).

[0036] For example, the first upper layer parameter is used to notify the UE of information on the invalid symbol pattern unavailable for PUSCH transmission. Also, the UE may be notified using DCI about whether the information on the invalid symbol pattern is applicable. In this case, a bit field (a field for notifying the applicability of the invalid symbol pattern) for indicating whether the information on the invalid symbol pattern is applicable may be set in the DCI.

[0037] Also, the UE may be notified of whether or not to set a notification field (or additional bit) in the DCI by using a second upper layer parameter. That is, when the UE is notified of information regarding an invalid symbol pattern by a first upper layer parameter, the UE may determine whether to apply the information regarding the invalid symbol pattern based on the second upper layer parameter and the DCI.

[0038] When the first upper layer parameter is not notified or set, the UE may control the transmission of the PUSCH without considering the invalid symbol pattern. When the first upper layer parameter is notified or set, the UE may determine whether to apply the invalid symbol pattern based on the second upper layer parameter and the DCI. For example, when the second upper layer parameter instructs to add an additional bit (or a predetermined field) for instructing whether to apply the invalid symbol pattern in the DCI, the UE may determine whether to apply the invalid symbol pattern based on the predetermined field.

[0039] The first upper layer parameter may be information for notifying a symbol pattern that becomes invalid for the transmission of the PUSCH. For example, a bitmap format may be applied (see FIG. 2A). FIG. 2A shows an example in which an invalid symbol pattern is defined by a bitmap (1-D bitmap) for the time domain. The UE may determine resources available for PUSCH transmission in one or more frequency bandwidths (e.g., BWP) based on the information regarding the invalid symbol pattern (see FIG. 2B).

[0040] Here, a case where one or a common invalid symbol pattern is applied to a plurality of BWPs is shown, but different invalid symbol patterns may be set or applied for each BWP.

[0041] (Nominal repetitions / Actual repetitions) When applying the repeated transmission type B and performing repeated transmission in units of sub-slots, depending on the repetition factor (K), the data allocation unit, etc., there may be a case where a certain repeated transmission crosses the slot boundary.

[0042] Figure 3A shows an example of applying the repeated transmission type B when the repetition factor (K) is 4 and the PUSCH length (L) is 4. In Figure 3A, the PUSCH with k = 3 is arranged across the slot boundary. In such a case, the PUSCH may be divided (or segmented) based on the slot boundary and then transmitted (see Figure 3B).

[0043] Also, a case is assumed where a symbol (e.g., a DL symbol or an invalid symbol, etc.) that cannot be used for PUSCH transmission is included in the slot. Figure 3A shows a case where a symbol that cannot be used for the PUSCH transmission (here, a DL symbol) is included in some of the symbols where the PUSCH with k = 1 is arranged. In such a case, PUSCH transmission may be performed using the symbols excluding the DL symbol (see Figure 3B).

[0044] In the allocated symbols of a certain PUSCH, if a DL symbol (or an invalid symbol) is included in the symbols other than both ends, PUSCH transmission may be performed using the symbols other than the DL symbol part. In this case, the PUSCH may be divided (or segmented).

[0045] Figure 3B shows a case where in the sub-slot-based repeated transmission, the PUSCH with k = 1 (Rep#2) is divided into two (Rep#2-1 and #2-2) by the DL symbol, and the PUSCH with k = 3 (Rep#4) is divided into two (Rep#4-1 and #4-2) by the slot boundary.

[0046] Note that the repeated transmission before considering DL symbols, invalid symbols, or slot boundaries (Figure 3A) may be referred to as nominal repetitions. The repeated transmission considering DL symbols, invalid symbols, or slot boundaries (Figure 3B) may be referred to as actual repetitions.

[0047] (Spatial relationship for SRS, PUSCH) In Rel.15 NR, the UE may receive information (SRS configuration information, e.g., parameters in the "SRS-Config" of the RRC control element) used for transmitting a sounding reference signal (e.g., Sounding Reference Signal (SRS)).

[0048] Specifically, the UE may receive at least one of information regarding one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of the RRC control element) and information regarding one or more SRS resources (SRS resource information, e.g., "SRS-Resource" of the RRC control element).

[0049] One SRS resource set may be associated with a predetermined number of SRS resources (the predetermined number of SRS resources may be grouped). Each SRS resource may be identified by an SRS Resource Indicator (SRI) or an SRS resource ID (Identifier).

[0050] The SRS resource set information may include an SRS-ResourceSetId, a list of SRS-ResourceIds used in the resource set, an SRS resource type (e.g., any of Periodic SRS, Semi-Persistent SRS, Aperiodic CSI), and information on the usage of the SRS.

[0051] Here, the SRS resource type may indicate any one of Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), and Aperiodic SRS (A-SRS). Note that the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation), and may transmit A-SRS based on the SRS request in DCI.

[0052] Also, the usage (the "usage" of RRC parameters, the "SRS-SetUse" of L1 (Layer-1) parameters) may be, for example, beam management, codebook (CB), non-codebook (NCB), antenna switching, etc. The SRS for codebook or non-codebook usage may be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on the SRI.

[0053] For example, in the case of codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on the SRI, the Transmitted Rank Indicator (TRI), and the Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on the SRI.

[0054] The SRS resource information may include the SRS-ResourceId, the number of SRS ports, the SRS port numbers, the transmission Comb, the SRS resource mapping (e.g., time and / or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, the SRS resource type, the sequence ID, the spatial relationship information of the SRS, etc.

[0055] The spatial relation information of the SRS (e.g., "spatialRelationInfo" of the RRC information element) may indicate the spatial relation information between a predetermined reference signal and the SRS. The predetermined reference signal may be at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Channel State Information Reference Signal (CSI-RS), and an SRS (e.g., another SRS). The SS / PBCH block may be referred to as a Synchronization Signal Block (SSB).

[0056] The spatial relation information of the SRS may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as the index of the predetermined reference signal.

[0057] Note that in the present disclosure, the SSB index, the SSB resource ID, and the SSB Resource Indicator (SSBRI) may be mutually interchangeable. Also, the CSI-RS index, the CSI-RS resource ID, and the CSI-RS Resource Indicator (CRI) may be mutually interchangeable. Also, the SRS index, the SRS resource ID, and the SRI may be mutually interchangeable.

[0058] The spatial relation information of the SRS may include a serving cell index corresponding to the predetermined reference signal, a Bandwidth Part index (BWP ID), etc.

[0059] When the UE is configured with spatial relationship information regarding an SSB or CSI-RS and an SRS for a certain SRS resource, the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain reception filter) for receiving the SSB or CSI-RS. In this case, the UE may assume that the UE reception beam of the SSB or CSI-RS and the UE transmission beam of the SRS are the same.

[0060] When the UE is configured with spatial relationship information regarding another SRS (reference SRS) and a certain SRS (target SRS) for a certain SRS (target SRS) resource, the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) for transmitting the reference SRS. That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.

[0061] The UE may determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a predetermined field (for example, SRS resource identifier (SRI) field) in the DCI (for example, DCI format 0_1). Specifically, the UE may use the spatial relationship information (for example, "spatialRelationInfo" of the RRC information element) of the SRS resource determined based on the value of the predetermined field (for example, SRI) for PUSCH transmission.

[0062] For PUSCH, when codebook-based transmission is used, two SRS resources may be configured by RRC for an SRS resource set, and one of the two SRS resources may be indicated by DCI (1-bit SRI field). For PUSCH, when non-codebook-based transmission is used, four SRS resources may be configured by RRC for an SRS resource set, and one of the four SRS resources may be indicated by DCI (2-bit SRI field).

[0063] (TPMI and Transmission Rank) In Rel.16, for codebook-based PUSCH transmission, it is being considered that the Transmitted Precoding Matrix Indicator (TPMI) and the transmission rank are specified by specific fields (e.g., precoding information and layer number field) included in the downlink control information (e.g., DCI format 0_1).

[0064] The precoder used by the UE for codebook-based PUSCH transmission may be selected from the uplink codebook having the same number of antenna ports as the value set by the higher layer parameter (e.g., nrofSRS-Ports) set for the SRS resource.

[0065] The size (number of bits) of the specific field is variable depending on the number of antenna ports for PUSCH (e.g., the number of ports indicated by the above nrofSRS-Ports) and some higher layer parameters.

[0066] The specific field may be 0 bits when the higher layer parameter (e.g., txConfig) set for the UE is set to nonCodebook.

[0067] Also, the specific field may be 0 bits for one antenna port when the higher layer parameter (e.g., txConfig) set for the UE is set to codebook.

[0068] Also, for the specific field, for four antenna ports, when the upper layer parameter (e.g., txConfig) set for the UE is set in the codebook, it may have a bit length of 2 to 6 bits based on at least one of another upper layer parameter set for the UE and the presence or absence (enabled or disabled) of a transform precoder.

[0069] Also, for the specific field, for two antenna ports, when the upper layer parameter (e.g., txConfig) set for the UE is set in the codebook, it may have a bit length of 1 to 4 bits based on at least one of another upper layer parameter set for the UE and the presence or absence (enabled or disabled) of a transform precoder.

[0070] The another upper layer parameter may be at least one of a parameter for specifying the UL full power transmission mode (e.g., ul - FullPowerTransmission), a parameter indicating the maximum value of the UL transmission rank (e.g., maxRank), a parameter indicating a subset of a certain precoding matrix indicator (PMI) (e.g., codebookSubset), and a parameter for specifying a transform precoder (e.g., transformPrecoder).

[0071] (Multi - TRP) In NR, it is being considered that one or more Transmission / Reception Points (TRPs) (multi - TRP) perform DL transmission to the UE using one or more panels (multi - panel). Also, it is being considered that the UE performs UL transmission to one or more TRPs (see Figure 4).

[0072] The multiple TRPs may correspond to the same cell identifier (cell Identifier (ID)), or may correspond to different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0073] However, in the existing NR specifications, how to control the repeated transmission of PUSCH in multi-panel / TRP (when multi-panel / TRP is configured) has not been sufficiently studied. If the repeated transmission of PUSCH in multi-TRP is not properly performed, there is a risk of throughput degradation or communication quality deterioration.

[0074] More specifically, a case is being considered where the repeated transmission of PUSCH in multiple TRPs is set to be enabled, and one DCI for the repeated transmission of PUSCH in multiple TRPs includes a specific number (e.g., two) of SRI fields.

[0075] FIGS. 5A-5C are diagrams showing an example of single PUSCH transmission, repeated transmission of PUSCH for a single TRP, and repeated transmission of PUSCH for multiple TRPs. In the example shown in FIG. 5A, the UE performs single PUSCH transmission using a first SRI determined from a first SRI field. In the example shown in FIG. 5B, the UE performs repeated transmission of PUSCH for a single TRP using a first SRI determined from a first SRI field. In the example shown in FIG. 5C, the UE performs repeated transmission of PUSCH for multiple TRPs using a first SRI determined from a first SRI field and a second SRI determined from a second SRI field.

[0076] However, in such a case, there is insufficient study on how to control the dynamic switch (switching) between single PUSCH transmission (see FIG. 5A) and repeated transmission of PUSCH for multiple TRPs (see FIG. 5C). Also, in such a case, there is insufficient study on how to control the dynamic switch between repeated transmission of PUSCH for a single TRP (see FIG. 5B) and repeated transmission of PUSCH for multiple TRPs. Therefore, the inventors have conceived a method for controlling PUSCH repeated transmission to solve the above problems.

[0077] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the respective embodiments may be applied individually or in combination.

[0078] In the present disclosure, a port, a panel, a beam, an Uplink (UL) transmission entity, a TRP, spatial relation information (SRI), a spatial relation, a control resource set (COntrol REsource SET (CORESET)), a PDSCH, a codeword, a base station, a predetermined antenna port (for example, a demodulation reference signal (DeModulation Reference Signal (DMRS)) port), a predetermined antenna port group (for example, a DMRS port group), a predetermined group (for example, a code division multiplexing (CDM) group, a predetermined reference signal group, a CORESET group, a panel group, a beam group, a spatial relation group, a PUCCH group), a CORESET pool, may be read as each other. Further, a panel Identifier (ID) and a panel may be read as each other. A TRP ID and a TRP may be read as each other.

[0079] In the present disclosure, an index, an ID, an indicator, a resource ID, may be read as each other.

[0080] In the present disclosure, "A / B" may mean "at least one of A and B". Further, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0081] In the present disclosure, a list, a group, a cluster, a subset, etc. may be read as each other. In the present disclosure, spatial relation information (Spatial Relation Information (SRI)), an SRS resource indicator (SRS Resource Indicator (SRI), (or an SRI field)), an SRS resource, a precoder, etc. may be read as each other.

[0082] In the present disclosure, spatial relation information (SRI), combinations of SRI, SRI for codebook-based transmission, combinations of non-codebook-based SRI, spatialRelationInfo, UL TCI, TCI state, Unified TCI, QCL, etc. may be read interchangeably with each other.

[0083] In the present disclosure, the first TRP and the second TRP may be read interchangeably with the first PUSCH and the second PUSCH, the first PUSCH transmission opportunity and the second PUSCH transmission opportunity, the first SRI and the second SRI, etc.

[0084] In the following embodiments, the repeated transmission of PUSCH for multiple TRPs may be read interchangeably with PUSCH over multiple TRPs, repeated PUSCH over multiple TRPs, simply repeated PUSCH, repeated transmission, multiple PUSCH transmissions, etc. Also, the single PUSCH transmission for a single TRP may be referred to as simply a single PUSCH transmission, PUSCH transmission in a single TRP, etc.

[0085] In the present disclosure, the repeated transmission of PUSCH for a single TRP may mean the repeated transmission of multiple PUSCHs transmitted using the same SRI / beam / precoder.

[0086] In the present disclosure, the repeated transmission of PUSCH for multiple TRPs may mean the repeated transmission of multiple PUSCHs transmitted using different multiple SRI / beam / precoders. The repeated transmission and the multiple SRI / beam / precoders may correspond cyclically, sequentially by a specific number, or in a correspondence using a half-half pattern (mapping). The cyclic correspondence, sequential correspondence, and correspondence using a half-half pattern (mapping) will be described in detail in the following embodiments.

[0087] In each embodiment of the present disclosure, the PUSCH transmission for a plurality of TRPs using one DCI and the codebook-based PUSCH transmission are described as examples. However, it may also be applied to non-codebook-based PUSCH transmission, and the PUSCH transmissions to which each embodiment can be applied are not limited to these. When each embodiment in the present disclosure is applied to non-codebook-based PUSCH transmission, one or more SRS resources (SRI) may be indicated to the UE by each SRI field. Also, common or different embodiments may be applied to codebook-based PUSCH transmission and non-codebook-based PUSCH transmission.

[0088] In each embodiment of the present disclosure, the case where the number of a plurality of TRPs, a plurality of SRIs, etc. is two is mainly described as an example. However, these numbers may be three or more. Also, the "dynamic switch" in the present disclosure may mean a "switch using at least one of upper layer signaling and physical layer signaling". Also, the "switch" in the present disclosure may be mutually read as switching, change, changing, application, etc.

[0089] (Wireless communication method) <First Embodiment> In the first embodiment, a dynamic switch between the repeated transmission of PUSCH in a single PUSCH transmission / single TRP and the repeated transmission of PUSCH in a plurality of TRPs may not be performed. In other words, in terms of specifications, a dynamic switch between the repeated transmission of PUSCH in a single PUSCH transmission / single TRP and the repeated transmission of PUSCH in a plurality of TRPs may not be supported.

[0090] The case where the dynamic switch between the repeated transmission of PUSCH in a single TRP and the repeated transmission of PUSCH in multiple TRPs is not performed (Embodiment 1-1) will be described. In Embodiment 1-1, when the repeated transmission in multiple TRPs is set to be enabled (enable) by upper layer signaling (for example, RRC signaling / MAC CE), the UE may assume (assume, expect) that it will be instructed to perform the repeated transmission of PUSCH using a specific number (for example, two or more) of different SRIs.

[0091] In Embodiment 1-1, the dynamic switch between the repeated transmission of PUSCH in a single TRP and the repeated transmission of PUSCH in multiple TRPs may not be allowed (Embodiment 1-1-1). In Embodiment 1-1-1, when a single DCI contains multiple SRI fields, for example, it is desirable that the SRI indicated by the first SRI field is different from the SRI indicated by the second SRI field.

[0092] Also, the case where the dynamic switch between a single PUSCH transmission and the repeated transmission of PUSCH in multiple TRPs is not performed (Embodiment 1-2) will be described. In Embodiment 1-2, the UE may assume (assume, expect) that the repeated transmission in multiple TRPs is set to be enabled (enable) by upper layer signaling (for example, RRC signaling / MAC CE), and the number of repetitions of the repeated transmission will not be set / instructed to be 1.

[0093] <Second Embodiment> In the second embodiment, the dynamic switch between the repeated transmission of PUSCH in a single TRP and the repeated transmission of PUSCH in multiple TRPs may be performed. In other words, the dynamic switch between the repeated transmission of PUSCH in a single TRP and the repeated transmission of PUSCH in multiple TRPs may be supported in terms of specifications.

[0094] In the second embodiment, when repeated transmission in a plurality of TRPs is set to be enabled (by upper layer signaling, e.g., RRC signaling / MAC CE), one DCI may include a specific number (e.g., two) of SRI fields. When the parameter regarding the number of repetitions notified by the DCI is specified / set to a value greater than 1, the UE may determine whether to perform repeated transmission for a single TRP or repeated transmission for a plurality of TRPs by at least one of the methods described in Embodiments 2-1 to 2-3 below.

[0095] Embodiment 2-1: Determine whether to perform repeated transmission for a single TRP or repeated transmission for a plurality of TRPs based on whether a specific number (e.g., two) of SRI fields indicate the same SRS resource (SRI) or different SRIs. Embodiment 2-2: Determine whether to perform repeated transmission for a single TRP or repeated transmission for a plurality of TRPs based on whether a not-applied code point is indicated in each of the plurality of SRI fields. Embodiment 2-3: Determine whether to perform repeated transmission for a single TRP or repeated transmission for a plurality of TRPs based on a specific field included in the DCI.

[0096] Note that in the present disclosure, the not-applied code point may be read as an inapplicable code point, a reserved code point, a code point indicating Not applied, etc. For example, for Embodiment 2-2, the not-applied code point may be the reserved code point in the SRI field in Rel. 16. Also, "Not applied" in the present disclosure may be read as "Not Applicable", "Not Available", "N / A", "not valid", etc.

[0097] Note that in Embodiment 2-3, the specific field included in the above DCI may be a field introduced after Rel.17, or a reserved code point of a specific field included in the DCI defined up to Rel.16 may be used.

[0098] 《Embodiment 2-1》 In Embodiment 2-1, the UE may determine whether to perform repeated transmission for a single TRP or repeated transmission for multiple TRPs based on whether a specific number (for example, two) of SRI fields indicate the same SRS resource (SRI) or different SRIs.

[0099] For example, when the same SRS resource (SRI) is indicated in a plurality (for example, two) of SRI fields, the UE may determine that the repeated transmission of a plurality of PUSCHs is performed at the same SRI (for example, a single TRP). In other words, when the same SRS resource (SRI) is indicated in a plurality (for example, two) of SRI fields, the UE may determine to perform repeated transmission of PUSCH at a single TRP.

[0100] Also, for example, when different SRS resources (SRIs) are indicated in a plurality (for example, two) of SRI fields, the UE may determine that the repeated transmission of a plurality of PUSCHs is performed at different SRIs (for example, multiple TRPs). In other words, when different SRS resources (SRIs) are indicated in a plurality (for example, two) of SRI fields, the UE may determine to perform repeated transmission of PUSCH at multiple TRPs.

[0101] When the UE determines to perform repeated transmission of PUSCH at multiple TRPs, it may determine that a plurality of SRIs correspond to a plurality of repeated transmissions cyclically.

[0102] FIG. 6A is a diagram showing an example in which a plurality of SRIs and a plurality of repeated transmissions correspond cyclically. In FIG. 6A, the UE performs repeated transmission of PUSCH using the first SRI and the second SRI with 6 specified as the number of repetitions. In the example shown in FIG. 6A, the UE cyclically performs PUSCH transmission using the first SRI and PUSCH transmission using the second SRI. For example, the first SRI may be applied to odd-numbered repetitions (repetitions #1, #3, #5), and the second SRI may be applied to even-numbered repetitions (repetitions #0, #2, #4).

[0103] When determining to perform repeated transmission of PUSCH at a plurality of TRPs, the UE may determine that a plurality of SRIs correspond sequentially, two by two, to a plurality of repeated transmissions.

[0104] FIG. 6B is a diagram showing an example in which a plurality of SRIs and a plurality of repeated transmissions correspond sequentially. In FIG. 6B, the UE performs repeated transmission of PUSCH using the first SRI and the second SRI with 6 specified as the number of repetitions. In the example shown in FIG. 6B, the UE sequentially performs PUSCH transmission using the first SRI and PUSCH transmission using the second SRI, two times each.

[0105] When determining to perform repeated transmission of PUSCH at a plurality of TRPs, a plurality of SRIs and a plurality of repeated transmissions may correspond continuously such that the number of repetitions approximately matches the number obtained by dividing the number of repetitions by the number of SRIs. When the number of SRIs is 2, this correspondence may be called a half-half pattern (mapping).

[0106] FIG. 6C is a diagram showing an example of using a half-half pattern for the correspondence between a plurality of SRIs and a plurality of repeated transmissions. In FIG. 6C, the UE performs repeated transmission of PUSCH using the first SRI and the second SRI with 6 specified as the number of repetitions. In the example shown in FIG. 6C, the UE performs PUSCH transmission using the first SRI in the first half (the first 3 times) of the PUSCH transmission opportunity, and performs PUSCH transmission using the second SRI in the second half (the subsequent 3 times) of the PUSCH transmission opportunity.

[0107] Note that the number of repeated transmissions of PUSCH, the number of SRIs, etc. shown in FIGS. 6A to 6C are merely examples and are not limited thereto. Also, the number of repeated transmissions of PUSCH, the number of code points / code point names of each field, the number of bits, the number of SRIs, etc. in the following drawings are merely examples and are not limited to these examples.

[0108] FIG. 7A is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Embodiment 2-1. In FIG. 7A, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 7A, the number of repetitions specified for the UE is 4.

[0109] In the example shown in FIG. 7A, for the UE, SRS resource #1 is indicated from each of SRI field #1 and SRI field #2. Since the SRS resources indicated in each of the two SRI fields are the same, the UE determines to perform repeated transmission of PUSCH in a single TRP.

[0110] FIG. 7B is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to Embodiment 2-1. In FIG. 7B, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 7B, the number of repetitions specified for the UE is 4.

[0111] In the example shown in FIG. 7B, for the UE, SRS resource #1 is indicated from among SRI field #1, and SRS resource #3 is indicated from among SRI field #2. Since the SRS resources indicated in each of the two SRI fields are different, the UE determines to perform repeated transmission of PUSCH in a plurality of TRPs. Note that the correspondence between the repeated transmission and the SRS resources described in FIG. 7B is described by the above cyclic correspondence, but is not limited thereto.

[0112] Note that Embodiment 2-1 may be assumed not to be applicable when different SRI fields correspond to different SRS resource sets (or SRS resource groups).

[0113] 《Embodiment 2-2》 In Embodiment 2-2, the UE may determine to perform either repeated transmission for a single TRP or repeated transmission for a plurality of TRPs based on whether an inapplicable code point is indicated in each of the plurality of SRI fields. The UE may assume that at most one "inapplicable code point" is indicated.

[0114] For example, when only one SRS resource (SRI) is applicable in a plurality (e.g., two) of SRI fields, the UE may determine that repeated transmission of a plurality of PUSCHs is performed in the applicable (valid) SRI. In other words, when one valid SRS resource (SRI) is indicated in a plurality of SRI fields and one invalid SRI (e.g., a reserved code point) is indicated, the UE may determine to perform repeated transmission of PUSCH in a single TRP.

[0115] When one reserved code point is indicated, the UE may be assumed to perform repeated transmission of PUSCH for a single TRP. In this case, the UE may perform repeated transmission of PUSCH for a single TRP using a pre-defined SRI. The pre-defined SRI may be an SRI notified / set by upper layer signaling, or an SRI corresponding to a specific code point included in DCI. The specific code point may be the minimum (maximum) code point (for example, 00 in the case of 2 bits).

[0116] Also, for example, when the plurality of SRS resources (SRI) are applied in a plurality of (for example, two) SRI fields, the UE may determine that repeated transmission of a plurality of PUSCHs is performed in a plurality of SRIs (for example, a plurality of TRPs). In other words, when the plurality of SRS resources (SRI) are applied in a plurality of SRI fields, the UE may determine to perform repeated transmission of PUSCH in a plurality of TRPs.

[0117] When determining to perform repeated transmission of PUSCH in a plurality of TRPs, the UE may determine that a plurality of SRIs correspond to a plurality of repeated transmissions in a cyclic manner.

[0118] When determining to perform repeated transmission of PUSCH in a plurality of TRPs, the UE may determine that a plurality of SRIs correspond to a plurality of repeated transmissions sequentially, for example, in groups of two.

[0119] When determining to perform repeated transmission of PUSCH in a plurality of TRPs, the UE may determine that a plurality of SRIs and a plurality of repeated transmissions correspond continuously such that the number of repetitions approximately matches the number obtained by dividing the number of repetitions by the number of SRIs.

[0120] FIG. 8A is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Embodiment 2-2. In FIG. 8A, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 8A, the number of repetitions specified for the UE is 4.

[0121] In the example shown in FIG. 8A, for the UE, SRS resource #1 is indicated from within SRI field #1, and an SRI that is "Not applied" is indicated from within SRI field #2. Since the SRS resource indicated in one SRI field is an SRI that is not applied, the UE determines to perform repeated transmission of PUSCH for a single TRP using SRS resource #1.

[0122] FIG. 8B is a diagram showing an example of repeated transmission of PUSCH for multiple TRPs according to Embodiment 2-2. In FIG. 8B, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 8B, the number of repetitions specified for the UE is 4.

[0123] In the example shown in FIG. 8B, for the UE, SRS resource #1 is indicated from within SRI field #1, and SRS resource #3 is indicated from within SRI field #2. Since the SRS resources indicated in each of the two SRI fields are not both SRIs that are not applied, the UE determines to perform repeated transmission of PUSCH in multiple TRPs. Note that the correspondence between the repeated transmission and the SRS resources described in FIG. 8B is described by the above cyclic correspondence, but is not limited thereto.

[0124] FIG. 9 is a diagram showing an example of an SRI field defined up to Rel. 16. As shown in FIG. 9, by using the reserved code points included in the SRI field defined up to Rel. 16 for the UE, a code point that is not applied may be indicated.

[0125] Note that Embodiment 2-2 may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups), respectively.

[0126] 《Embodiment 2-3》 In Embodiment 2-3, the UE may determine to perform either repeated transmission for a single TRP or repeated transmission for multiple TRPs based on a specific field included in the DCI.

[0127] For example, when it is indicated by a field included in the DCI to apply either the first SRI field or the second SRI field out of a plurality (e.g., two) of SRI fields (the first SRI field, the second SRI field), the UE may determine that the repeated transmission of a plurality of PUSCHs is performed in the applied SRI. In other words, when it is indicated by a field included in the DCI to apply one SRI field out of a plurality of SRI fields, the UE may determine to perform the repeated transmission of the PUSCH at a single TRP.

[0128] Also, for example, when it is indicated by a field included in the DCI to apply both the first SRI field and the second SRI field out of a plurality (e.g., two) of SRI fields (the first SRI field, the second SRI field), the UE may determine that the repeated transmission of a plurality of PUSCHs is performed in a plurality of SRIs (e.g., multiple TRPs). In other words, when it is indicated by a field included in the DCI to apply a plurality of SRI fields, the UE may determine to perform the repeated transmission of the PUSCH at multiple TRPs.

[0129] When determining to perform the repeated transmission of the PUSCH at multiple TRPs, the UE may determine that a plurality of SRIs correspond to a plurality of repeated transmissions in a cyclic manner.

[0130] When determining to perform repeated transmission of PUSCH on multiple TRPs, the UE may determine that multiple SRIs correspond to multiple repeated transmissions sequentially, for example, two at a time.

[0131] When determining to perform repeated transmission of PUSCH on multiple TRPs, the UE may determine that multiple SRIs and multiple repeated transmissions continuously correspond such that the number of repetitions approximately matches the number obtained by dividing the number of SRIs.

[0132] In addition, in Embodiment 2-3, when the setting is performed using upper layer signaling, the UE may assume that a specific field is included in the DCI.

[0133] FIG. 10 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Embodiment 2-3. In FIG. 10, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 10, the number of repetitions specified for the UE is 4.

[0134] In the example shown in FIG. 10, the UE is instructed to apply the SRS resource / SRS resource set corresponding to SRI field #1 and SRI field #1 by the field included in the DCI. Also, for the UE, SRS resource #1 is indicated from within SRI field #1, and SRS resource #3 is indicated from within SRI field #2. The UE determines to perform repeated transmission of PUSCH for a single TRP using SRS resource #1 based on the field included in the DCI. At this time, the UE may ignore the instruction regarding SRI field #2.

[0135] Note that in the example shown in FIG. 10, a case where the UE ignores the instruction regarding the SRI field not indicated by the field of the DCI has been described, but the UE may not receive the instruction regarding the SRI field not indicated by the field of the DCI.

[0136] FIG. 11 is a diagram showing an example of repeated transmission of PUSCH for a plurality of TRPs according to Embodiment 2-3. In FIG. 11, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 11, the number of repetitions specified for the UE is 4.

[0137] In the example shown in FIG. 11, the UE is instructed to apply SRI field #1 and SRI field #2 by a field included in the DCI. Also, for the UE, SRS resource #1 is instructed from within SRI field #1, and SRS resource #3 is instructed from within SRI field #2. The UE determines to perform repeated transmission of PUSCH for a plurality of TRPs using SRS resource #1 and SRS resource #3 by a field included in the DCI. Note that the correspondence between the repeated transmission and the SRS resources described in FIG. 11 is described by the above cyclic correspondence, but is not limited thereto.

[0138] Note that Embodiment 2-3 may be assumed to be applicable when different SRI fields respectively correspond to different SRS resource sets (SRS resource groups).

[0139] <<Modification Example of the Second Embodiment>> In Embodiment 2-2, a case may be considered where a plurality of TPMI / Transmit Power Control (TPC) commands / Phase Tracking Reference Signal (PTRS)-Demodulation Reference Signal (DMRS) fields are instructed for the UE, and there is a code point in the plurality of TPMI / TPC commands / PTRS-DMRS fields that instructs a TPMI / TPC command / PTRS-DMRS field not to be applied.

[0140] In such a case, when the UE is instructed with a TPMI / TPC command / PTRS-DMRS field that is not applicable, the UE may determine that the SRI corresponding to the instructed TPMI / TPC command / PTRS-DMRS field is an SRI that is not applicable (Variant 2-2). That is, when the UE is instructed with a TPMI / TPC command / PTRS-DMRS field that is not applicable, the UE may decide to transmit a PUSCH for a single TRP.

[0141] The TPMI / TPC command / PTRS-DMRS field and the SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index may correspond to the SRI having the nth index.

[0142] As described in Embodiment 2-2, the UE may assume that a maximum of one "non-applied code point" is instructed.

[0143] In Variant 2-2, the above non-applied code point may use the reserved code point of the TPMI field defined up to Rel.16.

[0144] FIG. 12 is a diagram showing an example of the relationship between the TPMI field and the SRI field according to a variant of the second embodiment. In the example shown in FIG. 12, an SRI field #1 corresponding to the TPMI field #1 and an SRI field #2 corresponding to the TPMI field #2 are set for the UE.

[0145] In the example shown in FIG. 12, for the UE, TPMI #0 is indicated from TPMI field #1, and a TPMI that is "Not applied" is indicated from TPMI field #2. At this time, the UE may determine that SRI field #1 corresponding to TPMI field #1 for which a valid TPMI is indicated is valid, and may determine not to apply SRI field #2 corresponding to TPMI field #2 for which an unapplied TPMI is indicated. In this example, even when "00" is specified as SRI field #2, the UE does not apply the SRI (SRS resource #3) corresponding to SRI field #2 to the repeated transmission of the PUSCH.

[0146] Also, in Embodiment 2-3, a specific field included in the DCI may be a field for indicating either a single SRI field or a plurality of SRI fields (Modification 2-3).

[0147] In Modification 2-3, when a single SRI field is indicated by a specific field included in the DCI, the UE may use the default SRI field. The default SRI field may be an SRI field having the minimum index / maximum index / x-th index (x is an integer), or may be the first / last / x-th positioned SRI field (Modification 2-3-1).

[0148] Also, in Modification 2-3, when a single SRI field is indicated by a specific field included in the DCI, the UE may determine, as the SRI field to be applied to the repeated transmission of the PUSCH, any one of the plurality of SRI fields that are statically set / updated by upper layer signaling (e.g., RRC signaling / MAC CE) (Modification 2-3-2).

[0149] FIG. 13 is a diagram showing an example of repeated transmission of PUSCH for a single TRP according to Modification Example 2-3. In FIG. 13, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 13, the number of repetitions specified for the UE is 4.

[0150] In the example shown in FIG. 13, the UE is instructed to apply a single SRI by a field included in the DCI. Also, for the UE, SRS resource #1 is indicated from among SRI field #1, and SRS resource #3 is indicated from among SRI field #2. Also, in the example shown in FIG. 13, the default SRI field is SRI field #1. The UE determines to perform repeated transmission of PUSCH for a single TRP using SRS resource #1, which is the default SRI field, by a field included in the DCI. At this time, the UE may ignore the instruction regarding SRI field #2.

[0151] FIG. 14 is a diagram showing an example of repeated transmission of PUSCH for multiple TRPs according to Modification Example 2-3. In FIG. 14, two SRI fields (SRI field #1 and SRI field #2) are set for the UE. In the example shown in FIG. 14, the number of repetitions specified for the UE is 4.

[0152] In the example shown in FIG. 14, the UE is instructed to apply a plurality of SRI fields by a field included in the DCI. Also, for the UE, SRS resource #1 is indicated from among SRI field #1, and SRS resource #3 is indicated from among SRI field #2. The UE determines to perform repeated transmission of PUSCH for multiple TRPs using SRS resource #1 and SRS resource #3 by a field included in the DCI. Note that the correspondence between the repeated transmission and the SRS resources described in FIG. 14 is described by the above cyclic correspondence, but is not limited thereto.

[0153] In addition, in Embodiments 2-2 and 2-3, when a plurality of SRI fields and a plurality of TPMI / TPC command / PTRS-DMRS fields are indicated, if the UE determines that the SRI field is not applicable, it may also be determined that the TPMI / TPC command / PTRS-DMRS field corresponding to the SRI is not applicable. At this time, the TPMI / TPC command / PTRS-DMRS field and the SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index and the SRI having the nth index may correspond to each other.

[0154] According to the second embodiment above, it is possible to appropriately control the dynamic switching between the repeated transmission of the PUSCH for a single TRP and the repeated transmission of the PUSCH for a plurality of TRPs.

[0155] <The Third Embodiment> In the third embodiment, a dynamic switch between a single PUSCH transmission and the repeated transmission of the PUSCH in a plurality of TRPs may be performed. In other words, the dynamic switch between a single PUSCH transmission and the repeated transmission of the PUSCH in a plurality of TRPs may be supported in terms of specifications.

[0156] In the third embodiment, when the repeated transmission in a plurality of TRPs is set to be enabled (enable) by upper layer signaling (for example, RRC signaling / MAC CE), a specific number (for example, two) of SRI fields may be included in one DCI. When a single PUSCH transmission is indicated to the UE (for example, when 1 is set / indicated as the number of repetitions), the UE may determine the SRS resource (SRI) for performing the single PUSCH transmission by at least one of the methods described in Embodiments 3-1 to 3-4 below.

[0157] <<Embodiment 3-1>> In Embodiment 3-1, when a single PUSCH transmission is indicated to the UE, the UE may assume that a specific number (for example, two) of SRI fields indicate the same SRS resource (SRI).

[0158] FIG. 15 is a diagram showing an example of a single PUSCH transmission according to Embodiment 3-1. In FIG. 15, two SRI fields (SRI field #1 and SRI field #2) are set for the UE.

[0159] In the example shown in FIG. 15, SRS resource #1 is indicated to the UE from each of SRI field #1 and SRI field #2. Since the SRS resources indicated in each of the two SRI fields are the same, the UE determines to perform a single PUSCH transmission.

[0160] Note that Embodiment 3-1 may be assumed not to be applicable when different SRI fields correspond to different SRS resource sets (or SRS resource groups).

[0161] 《Embodiment 3-2》 In Embodiment 3-2, when a single PUSCH transmission is indicated to the UE, the UE may assume that at least one non-applied code point is indicated in each of the plurality of SRI fields. At this time, the UE may assume that a maximum of one "non-applied code point" is indicated.

[0162] Note that in Embodiment 3-2, as the non-applied code point, the reserved code point of the SRI field defined up to Rel. 16 may be used.

[0163] FIG. 16 is a diagram showing an example of a single PUSCH transmission according to Embodiment 3-2. In FIG. 16, two SRI fields (SRI field #1 and SRI field #2) are set for the UE.

[0164] In the example shown in FIG. 16, for the UE, SRS resource #1 is indicated from among SRI field #1, and an SRI that is "Not applied" is indicated from among SRI field #2. Since the SRS resource indicated in one SRI field is an SRI that is not applied, the UE determines to perform a single PUSCH transmission using SRS resource #1.

[0165] Note that Embodiment 3-2 may be assumed to be applicable when different SRI fields respectively correspond to different SRS resource sets (SRS resource groups).

[0166] 《Embodiment 3-3》 In Embodiment 3-3, when a single PUSCH transmission is indicated for the UE, the UE may be indicated by a specific field included in the DCI as to which SRI field to use.

[0167] Note that in Embodiment 3-3, the specific field included in the above DCI may be a field introduced after Rel. 17, or a reserved code point of a specific field included in the DCI defined up to Rel. 16 may be used.

[0168] FIG. 17 is a diagram showing an example of a single PUSCH transmission according to Embodiment 3-3. In FIG. 17, two SRI fields (SRI field #1 and SRI field #2) are set for the UE.

[0169] In the example shown in FIG. 17, the UE is instructed to apply SRI field #1 by the field included in the DCI. Also, for the UE, SRS resource #1 is indicated from among SRI field #1, and SRS resource #3 is indicated from among SRI field #2. The UE determines to perform a single PUSCH transmission using SRS resource #1, which is the default SRI field, by the field included in the DCI. At this time, the UE may ignore the instruction regarding SRI field #2.

[0170] Note that in the example shown in FIG. 17, a case where the UE ignores an instruction regarding an SRI field for which no application instruction using DCI is given has been described, but the UE may not receive an instruction regarding an SRI field for which no application instruction using DCI is given.

[0171] Note that Embodiment 3-3 may be assumed to be applicable when different SRI fields correspond to different SRS resource sets (SRS resource groups), respectively.

[0172] 《Embodiment 3-4》 In Embodiment 3-4, when a single PUSCH transmission is instructed for the UE, the UE may perform a single PUSCH transmission using the default SRI field. The default SRI field may be an SRI field having a minimum / maximum / x-th index. Also, the default SRI field may be set / updated by upper layer signaling (e.g., RRC signaling / MAC CE).

[0173] Note that in Embodiment 3-4, the specific field included in the above DCI may be a field introduced after Rel. 17, or a reserved code point of a specific field included in the DCI defined up to Rel. 16 may be used.

[0174] Also, in Embodiment 3-4, the UE may ignore SRI fields other than the default SRI field, TPMI fields corresponding to SRI fields other than the default SRI field, and TPC command fields corresponding to SRI fields other than the default SRI field.

[0175] FIG. 18 is a diagram showing an example of a single PUSCH transmission according to Embodiment 3-4. In FIG. 18, two SRI fields (SRI field #1 and SRI field #2) are set for the UE.

[0176] In the example shown in FIG. 18, SRS resource #1 is indicated from within SRI field #1 for the UE, and SRS resource #3 is indicated from within SRI field #2. Also, in the example shown in FIG. 18, the default SRI field is SRI field #1. When a single PUSCH transmission is indicated for the UE, the single PUSCH transmission is performed using SRI field #1, which is the default SRI field. At this time, the UE may ignore the instruction regarding SRI field #2.

[0177] Note that Embodiment 3-4 may be assumed to be applicable when different SRI fields respectively correspond to different SRS resource sets (SRS resource groups).

[0178] 《Modification Example of the Third Embodiment》 In Embodiment 3-2, a case may be considered where a plurality of TPMI / transmission power control (TPC) command / phase tracking reference signal (Phase Tracking Reference Signal (PTRS))-demodulation reference signal (DeModulation Reference Signal (DMRS)) fields are indicated for the UE, and there is a code point in the plurality of TPMI / TPC command / PTRS-DMRS fields that indicates a TPMI / TPC command / PTRS-DMRS field not to be applied.

[0179] In such a case, when the UE is instructed with a TPMI / TPC command / PTRS-DMRS field not to be applied, the UE may determine that the SRI corresponding to the instructed TPMI / TPC command / PTRS-DMRS field is an SRI not to be applied (Modification Example 3-2). That is, when the UE is instructed with a TPMI / TPC command / PTRS-DMRS field not to be applied, the UE may decide to perform a single PUSCH transmission.

[0180] The TPMI / TPC command / PTRS-DMRS field and the SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index and the SRI having the nth index may correspond to each other.

[0181] As described in Embodiment 3-2, the UE may assume that a maximum of one "code point not to be applied" is instructed. In Modification Example 3-2, the UE may perform the control described in FIG. 12 above.

[0182] In the modification example of Modification Example 3-2, the reserved code point of the TPMI field defined up to Rel. 16 may be used as the code point not to be applied.

[0183] In Embodiments 3-2, 3-3, and 3-4, when a plurality of SRI fields and a plurality of TPMI / TPC command / PTRS-DMRS fields are instructed, and the UE determines that the SRI field is not to be applied, it may also be determined that the TPMI / TPC command / PTRS-DMRS field corresponding to the SRI is not to be applied. At this time, the TPMI / TPC command / PTRS-DMRS field and the SRI may have a one-to-one correspondence. For example, the TPMI / TPC command / PTRS-DMRS field having the nth index and the SRI having the nth index may correspond to each other.

[0184] According to the third embodiment above, it is possible to appropriately control the dynamic switching between single PUSCH transmission and repeated transmission of PUSCH for multiple TRPs.

[0185] <Fourth Embodiment> In the fourth embodiment, the UE capability regarding the dynamic switch between repeated transmission / single PUSCH transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs will be described. The UE may report (transmit) to the NW regarding whether it has such capability.

[0186] The UE capability regarding the dynamic switch between repeated transmission / single PUSCH transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs may be defined as whether the dynamic switch between single PUSCH transmission and repeated transmission of PUSCH for multiple TRPs is supported.

[0187] Also, the UE capability regarding the dynamic switch between repeated transmission / single PUSCH transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs may be defined as whether the dynamic switch between repeated transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs is supported.

[0188] Also, the UE capability regarding the dynamic switch between repeated transmission / single PUSCH transmission of PUSCH for a single TRP and repeated transmission of PUSCH for multiple TRPs may be defined as whether the dynamic switch between single PUSCH transmission / repeated transmission of PUSCH for the first TRP and single PUSCH transmission / repeated transmission of PUSCH for the second TRP is supported.

[0189] In addition, the UE capability regarding the dynamic switch between the repeated transmission of PUSCH for a single TRP / single PUSCH transmission and the repeated transmission of PUSCH for multiple TRPs may be defined as whether a plurality of SRI / TPMI / TPC commands / PTRS-DMRS fields are supported or not.

[0190] Note that each embodiment of the present disclosure may be applied under at least one of the following conditions: when the UE reports to the NW the UE capability corresponding to at least one of the above, and when the UE is set / activated / instructed by upper layer signaling for at least one of the above UE capabilities. Each embodiment of the present disclosure may be applied when a specific upper layer parameter is set / activated / instructed for the UE.

[0191] (Wireless communication system) Hereinafter, the configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure.

[0192] FIG. 19 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) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0193] In addition, the wireless communication system 1 may support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (RATs). 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.

[0194] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0195] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, NR-NR Dual Connectivity (NN-DC) where both the MN and the SN are base stations (gNBs) of NR).

[0196] The wireless communication system 1 may include a base station 11 that forms a relatively wide-coverage macro cell C1, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and the user terminal 20 are not limited to the modes shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0197] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) and dual connectivity (DC) using a plurality of component carriers (CCs).

[0198] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0199] Also, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0200] The plurality of base stations (e.g., RRH) 10 may be connected by wire (e.g., an optical fiber compliant with Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0201] The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include at least one of, for example, Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0202] The user terminal 20 may be a terminal corresponding to at least one of communication methods such as LTE, LTE-A, 5G, etc.

[0203] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method 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.

[0204] The wireless access method may be called a waveform. Note that in the wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0205] In the wireless communication system 1, as downlink channels, a Physical Downlink Shared Channel (PDSCH) shared by each user terminal 20, a Physical Broadcast Channel (PBCH), a Physical Downlink Control Channel (PDCCH), etc. may be used.

[0206] Also, in the wireless communication system 1, as uplink channels, a Physical Uplink Shared Channel (PUSCH) shared by each user terminal 20, a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), etc. may be used.

[0207] User data, upper layer control information, a System Information Block (SIB), etc. are transmitted by the PDSCH. User data, upper layer control information, etc. may be transmitted by the PUSCH. Also, a Master Information Block (MIB) may be transmitted by the PBCH.

[0208] 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.

[0209] Note that the DCI for scheduling the PDSCH may be called DL assignment, DL DCI, etc., and the DCI for scheduling the PUSCH may be called UL grant, UL DCI, etc. Note that the PDSCH may be read as DL data, and the PUSCH may be read as UL data.

[0210] For PDCCH detection, a control resource set (CORESET) and a search space may be used. The CORESET corresponds to the resource for searching for DCI. The search space corresponds to the search area and search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0211] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", etc. in the present disclosure may be read interchangeably with each other.

[0212] Uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (for example, may be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) may be transmitted by PUCCH. A random access preamble for connection establishment with the cell may be transmitted by PRACH.

[0213] Note that in the present disclosure, downlink, uplink, etc. may be expressed without adding "link". Also, "Physical" may not be added at the beginning of various channels.

[0214] 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.

[0215] 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 SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, an SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0216] Also, in the wireless communication system 1, as the uplink reference signal (UL-RS), a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted. Note that DMRS may also be called a UE-specific reference signal.

[0217] (Base station) FIG. 20 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 transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may be provided.

[0218] In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processes of each part described below may be omitted.

[0219] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0220] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission / reception, measurement, etc., using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data, control information, a sequence, etc., to be transmitted as a signal, and transfer it to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, releasing, etc.) of a communication channel, state management of the base station 10, management of radio resources, etc.

[0221] The transmission / reception 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 transmission / reception unit 120 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0222] The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122. The reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0223] The transmission / reception antenna 130 can be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, such as an array antenna.

[0224] The transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0225] The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0226] The transmission / reception unit 120 (transmission processing unit 1211) may perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (e.g., RLC retransmission control), processing of the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, for example, and generate a bit string to be transmitted.

[0227] The transceiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel encoding (which may include error correction encoding), 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 sequence to be transmitted, and output a baseband signal.

[0228] The transceiver unit 120 (RF unit 122) may perform modulation to the radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the signal in the radio frequency band via the transceiver antenna 130.

[0229] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to the baseband signal, etc. on the signal in the radio frequency band received by the transceiver antenna 130.

[0230] The transceiver unit 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 on the acquired baseband signal, and acquire user data, etc.

[0231] The transmission / reception unit 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.

[0232] The transmission path interface 140 may transmit and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0233] Note that the transmission unit and reception unit of the base station 10 in the present disclosure may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0234] The transmitting / receiving unit 120 may transmit one downlink control information (Downlink Control Information (DCI)) for a plurality of physical uplink shared channels (Physical Uplink Shared Channel (PUSCH)). The control unit 110 may control the reception of the plurality of PUSCH using a plurality of SRIs or the plurality of PUSCH using a single SRI, which are transmitted based on at least one of a plurality of first pieces of information indicating a sounding reference signal resource indicator (Sounding Reference Signal Resource Indicator (SRI)) included in the DCI (Second Embodiment).

[0235] The transmitting / receiving unit 120 may transmit one downlink control information (Downlink Control Information (DCI)) for one or more physical uplink shared channels (Physical Uplink Shared Channel (PUSCH)). The control unit 110 may control the reception of the plurality of PUSCH using a plurality of SRIs or the single PUSCH using a single SRI, which are transmitted based on at least one of a plurality of first pieces of information indicating a sounding reference signal resource indicator (Sounding Reference Signal Resource Indicator (SRI)) included in the DCI (Third Embodiment).

[0236] (User Equipment) FIG. 21 is a diagram showing an example of the configuration of a user equipment according to an embodiment. The user equipment 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0237] In this example, the functional blocks of the characteristic portions in the present embodiment are mainly shown, and the user equipment 20 may be assumed to have other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

[0238] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, etc. described based on the common understanding in the technical field related to the present disclosure.

[0239] 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.

[0240] The transmission / reception 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 transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common understanding in the technical field related to the present disclosure.

[0241] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 2211 and the RF unit 222. The reception unit may be composed of the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0242] The transmission / reception antenna 230 can be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, for example, an array antenna.

[0243] The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0244] The transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0245] The transmission / reception unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, for example, and generate a bit string to be transmitted.

[0246] The transmission / reception unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0247] Note that whether to apply DFT processing may be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is enabled, the transmission / reception unit 220 (transmission processing unit 2211) may perform DFT processing as the above transmission processing to transmit the channel using the DFT-s-OFDM waveform, or if not, it may not perform DFT processing as the above transmission processing.

[0248] The transmission / reception unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 230.

[0249] On the other hand, the transmission / reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmission / reception antenna 230.

[0250] The transmission / reception unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and may acquire user data and the like.

[0251] The transmission / reception unit 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), reception 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.

[0252] Note that the transmission unit and reception unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0253] The transmission / reception unit 220 may receive one piece of downlink control information (Downlink Control Information (DCI)) for a plurality of physical uplink shared channels (Physical Uplink Shared Channel (PUSCH)). The control unit 210 may control the transmission of the plurality of PUSCH using a plurality of sounding reference signals or the plurality of PUSCH using a single SRI based on at least one of a plurality of first pieces of information indicating a sounding reference signal resource indicator (Sounding Reference Signal Resource Indicator (SRI)) included in the DCI (second embodiment).

[0254] When the plurality of first pieces of information indicate the same SRI, the control unit 210 may control the transmission of the plurality of PUSCH using the single SRI (second embodiment).

[0255] When at least one of the plurality of first pieces of information includes an indication indicating inapplicability, the control unit 210 may control to transmit the plurality of PUSCHs by using the single SRI (second embodiment).

[0256] The DCI may include second information for instructing application of a plurality of SRIs or a single SRI. The control unit 210 may control whether to apply the plurality of SRIs or the single SRI to the plurality of PUSCHs based on the second information (second embodiment).

[0257] The transceiver unit 220 may receive one downlink control information (Downlink Control Information (DCI)) for one or more physical uplink shared channels (Physical Uplink Shared Channel (PUSCH)). The control unit 210 may control transmission of a plurality of PUSCHs using a plurality of SRIs or a single PUSCH using a single SRI based on at least one of a plurality of first pieces of information included in the DCI that indicate a sounding reference signal resource indicator (Sounding Reference Signal Resource Indicator (SRI)) (third embodiment).

[0258] When the plurality of first pieces of information indicate the same SRI, the control unit 210 may control to transmit the single PUSCH (third embodiment).

[0259] When at least one of the plurality of first pieces of information includes an indication indicating inapplicability, the control unit 210 may control to transmit the single PUSCH (third embodiment).

[0260] The DCI may include second information for instructing application of a plurality of SRIs or a single SRI. The control unit 210 may control whether to transmit the plurality of PUSCHs or to transmit the single PUSCH based on the second information (third embodiment).

[0261] (Hardware Configuration) Note that the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (for example, using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0262] Here, functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication (communicating), forwarding, configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), etc. For example, a functional block (component) that functions as transmission may be referred to as a transmission unit, a transmitter, etc. In any case, as described above, the realization method is not particularly limited.

[0263] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 22 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may physically be 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.

[0264] In the present disclosure, terms such as device, circuit, device, section, unit, etc. can be read interchangeably with each other. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0265] For example, although only one processor 1001 is illustrated, there may be a plurality of processors. Also, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or using other methods. Note that the processor 1001 may be implemented by one or more chips.

[0266] Each function in the base station 10 and the user terminal 20 is realized, for example, by causing a predetermined software (program) to be loaded onto hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs calculations, controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003.

[0267] The processor 1001 controls the entire computer by operating, for example, an operating system. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0268] Further, the processor 1001 reads a program (program code), software module, 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 these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and the same may be true for other functional blocks.

[0269] The memory 1002 is a computer-readable recording medium, and may be constituted by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other appropriate storage media. The memory 1002 may be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0270] The storage 1003 is a computer-readable recording medium, and may be constituted by at least one of, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other appropriate storage media. The storage 1003 may be referred to as an auxiliary storage device.

[0271] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-described transceiver unit 120 (220), the transceiver antenna 130 (230), etc. may be implemented by the communication device 1004. The transceiver unit 120 (220) may be physically or logically separated into a transmitter unit 120a (220a) and a receiver unit 120b (220b).

[0272] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0273] Also, 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 for each device.

[0274] In addition, 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), and a Field Programmable Gate Array (FPGA), and some or all of the functional blocks may be implemented using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0275] (Modification example) Regarding the terms described in the present disclosure and the terms necessary for understanding the present disclosure, they may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be read interchangeably with each other. Also, a signal may be a message. A reference signal may also be abbreviated as RS and may be called a Pilot, a pilot signal, etc. depending on the applicable standard. Also, a Component Carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, etc.

[0276] The radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be called a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0277] Here, the new numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The new numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering process performed by a transceiver in the frequency domain, specific windowing process performed by a transceiver in the time domain, etc.

[0278] A slot may be composed of one or more symbols (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Also, a slot may be a time unit based on the new numerology.

[0279] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of symbols than a slot. The PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called PDSCH (PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using a mini-slot may be called PDSCH (PUSCH) mapping type B.

[0280] A radio frame, sub-frame, slot, mini-slot, and symbol all represent time units for signal transmission. Different names may be used for the radio frame, sub-frame, slot, mini-slot, and symbol respectively. Note that the time units such as frame, sub-frame, slot, mini-slot, and symbol in the present disclosure may be read interchangeably with each other.

[0281] For example, one sub-frame may be called a TTI, or a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or 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, a mini-slot, etc. instead of a sub-frame.

[0282] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI. Note that the definition of the TTI is not limited to this.

[0283] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), code block, codeword, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when the TTI is given, the time interval (for example, the number of symbols) in which the transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0284] In addition, when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (number of mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0285] 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 TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0286] Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of a long TTI and not less than 1 ms.

[0287] A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or a plurality of consecutive subcarriers. 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.

[0288] In addition, an RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be constituted by one or a plurality of resource blocks.

[0289] Note that one or more RBs may be referred to as a Physical Resource Block (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, etc.

[0290] Also, a resource block may be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0291] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within the BWP.

[0292] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be set within one carrier for a UE.

[0293] At least one of the set BWPs may be active, and it may not be assumed that the UE transmits and receives a predetermined signal / channel outside the active BWP. Note that in the present disclosure, "cell", "carrier", etc. may be read as "BWP".

[0294] Note that the structures such as the above-described radio frame, subframe, slot, mini-slot, and symbol 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 mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of sub-carriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be variously changed.

[0295] Also, the information, parameters, etc. described in the present disclosure may be represented using absolute values, relative values from a predetermined value, or using corresponding other information. For example, a radio resource may be indicated by a predetermined index.

[0296] The names used for parameters, etc. in the present disclosure are not limiting names in any way. Furthermore, mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Since various channels (such as PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0297] The information, signals, etc. described in the present disclosure may be represented using any of various different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0298] Also, information, signals, etc. may be output from at least one of the upper layer to the lower layer and from the lower layer to the upper layer. Information, signals, etc. may be input and output via a plurality of network nodes.

[0299] The input / output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. The information, signals, etc. to be input / output may be overwritten, updated, or appended. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

[0300] The notification of information is not limited to the modes / 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), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0301] Note that the physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Also, the RRC signaling may also be referred to as an RRC message and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. Further, the MAC signaling may be notified, for example, using a MAC Control Element (CE).

[0302] Also, the notification of predetermined information (e.g., the notification of "being X") is not limited to an explicit notification and may be performed implicitly (e.g., by not performing the notification of the predetermined information or by the notification of another piece of information).

[0303] The determination may be made by a value represented by 1 bit (either 0 or 1), by a boolean value represented by true or false, or by a numerical comparison (e.g., comparison with a predetermined value).

[0304] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by some other name.

[0305] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (such as infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0306] The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may mean the devices (e.g., base stations) included in the network.

[0307] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0308] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. can be used interchangeably. The base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0309] A base station can accommodate one or more (e.g., three) cells. When the base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each of the smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0310] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0311] A mobile station may also be called a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other appropriate term.

[0312] At least one of the base station and the mobile station may also be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves without a driver (e.g., a drone, a self-driving vehicle, etc.), or a robot (humanoid or non-humanoid). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0313] In addition, the base station in the present disclosure may be replaced by a user terminal. For example, for a configuration in which communication between the base station and the user terminal is replaced by communication between a plurality of user terminals (which may be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured as functions of the user terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be replaced with a side channel.

[0314] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the functions of the above-described user terminal 20 may be configured as functions of the base station 10.

[0315] In the present disclosure, operations assumed to be performed by the base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having a base station, it is obvious that various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

[0316] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be reordered as long as there is no contradiction. For example, for the method described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the presented specific order.

[0317] Each aspect / embodiment described in the present disclosure may be applied to systems that utilize Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is, for example, an integer or a decimal), 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), other suitable wireless communication methods, and next-generation systems extended based on these. Further, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

[0318] The description "based on" used in the present disclosure does not mean "only based on" unless otherwise specified. In other words, the description "based on" means both "only based on" and "at least based on".

[0319] Any reference to an element using terms such as "first", "second", etc. used in this disclosure does not generally limit the quantity or order of those elements. These terms can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, the reference to a first and a second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.

[0320] The term "determining" as used in this disclosure may encompass a wide variety of operations. For example, "determining" may be considered to be "judging", "calculating", "computing", "processing", "deriving", "investigating", "looking up, search, inquiry" (e.g., searching in a table, database, or another data structure), "ascertaining", etc.

[0321] Also, "determining" may be considered to be "receiving" (e.g., receiving information), "transmitting" (e.g., transmitting information), "input", "output", "accessing" (e.g., accessing data in memory), etc.

[0322] Also, "determining" may be considered to be "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "determining" may be considered to be "determining" some operation.

[0323] Also, the term "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

[0324] As used in this disclosure, the terms "connected" and "coupled", or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed".

[0325] In this disclosure, when two elements are connected, they can be considered to be "connected" or "coupled" to each other using one or more electric wires, cables, printed electrical connections, etc., and also, by way of some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, optical (both visible and invisible) region, etc.

[0326] In this disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate", "coupled", etc. may also be interpreted in the same way as "different".

[0327] In this disclosure, when the terms "include", "including", and their variations are used, these terms are intended to be inclusive, in the same way as the term "comprising". Further, the term "or" as used in this disclosure is not intended to be an exclusive disjunction.

[0328] In the present disclosure, for example, when articles are added by translation, such as a, an, and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0329] As described above, the invention according to the present disclosure has been described in detail. However, it is obvious 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 modifications and variations without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of exemplification and does not bring any limiting meaning to the invention according to the present disclosure.

Claims

1. a receiving unit that receives downlink control information (DCI) including at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a second SRI field, and a specific field indicating an application of either a single SRI field or a plurality of SRI fields; a control unit that determines transmission of either a physical uplink shared channel (PUSCH) repetition associated with a plurality of SRS resource sets or a PUSCH repetition associated with a single SRS resource set based on at least one of the first SRI field and the second SRI field and the specific field; The terminal, wherein the PUSCH repetition associated with the plurality of SRS resource sets is applied with sequential mapping.

2. The terminal according to claim 1, wherein when the specific field indicates an application of the single SRI field, the control unit controls to perform transmission of the PUSCH repetition associated with the single SRS resource set.

3. The terminal according to claim 1, wherein when the specific field indicates an application of the plurality of SRI fields, the control unit controls to perform transmission of the PUSCH repetition associated with the plurality of SRS resource sets.

4. The terminal according to claim 1, wherein when the specific field indicates an application of the single SRI field, the control unit ignores an indication by the second SRI field even when both the first SRI field and the second SRI field are included in the DCI.

5. receiving downlink control information (DCI) including at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a second SRI field, and a specific field indicating an application of either a single SRI field or a plurality of SRI fields; determining transmission of either a physical uplink shared channel (PUSCH) repetition associated with a plurality of SRS resource sets or a PUSCH repetition associated with a single SRS resource set based on at least one of the first SRI field and the second SRI field and the specific field; The PUSCH repetition associated with the plurality of SRS resource sets is a wireless communication method of a terminal to which sequential mapping is applied. **Claim 6** A transmitter that transmits downlink control information (DCI) including at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a second SRI field, and a specific field indicating the application of either a single SRI field or a plurality of SRI fields; A controller that uses at least one of the first SRI field and the second SRI field and the specific field to indicate either a physical uplink shared channel (PUSCH) repetition associated with a plurality of SRS resource sets or a PUSCH repetition associated with a single SRS resource set; The PUSCH repetition associated with the plurality of SRS resource sets is a base station to which sequential mapping is applied. **Claim 7** A system having a base station and a terminal, wherein the base station has a transmitter that transmits downlink control information (DCI) including at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a second SRI field, and a specific field indicating the application of either a single SRI field or a plurality of SRI fields; wherein the terminal has a receiver that receives the DCI, and a controller that determines whether to transmit either a physical uplink shared channel (PUSCH) repetition associated with a plurality of SRS resource sets or a PUSCH repetition associated with a single SRS resource set based on at least one of the first SRI field and the second SRI field and the specific field; The PUSCH repetition associated with the plurality of SRS resource sets is a system to which sequential mapping is applied.

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