Terminal, wireless communication method, base station, and system

Abstract

A terminal according to an aspect of the present disclosure comprises: a control unit that determines, when the number of SRS resources to be designated by using a sounding reference signal (SRS) resource indicator (SRI) for transmission of a physical uplink shared channel and / or the number of precoding matrices to be designated by using a transmitted precoding matrix indicator (TPMI) for transmission of the physical uplink shared channel is 2 or more, mapping between layers for transmission of the physical uplink shared channel and ports of the SRS resources to be designated; and a transmission unit that transmits the physical uplink shared channel. According to the aspect of the present disclosure, PUSCH transmission can be appropriately performed.

Description

Technical Field

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

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] For future wireless communication systems (e.g., Rel.18 NR), it is being considered that a user terminal (User Equipment (UE)) transmits a plurality of code words (Code Word (CW)) using the Physical Uplink Shared Channel (PUSCH). However, the details of this operation have not been fully studied. For example, when transmitting a plurality of CWs using PUSCH, how to control CW generation, layer mapping, precoding, etc. has not been fully studied. If PUSCH transmission for a plurality of CWs is not properly performed, there is a risk of throughput degradation or communication quality deterioration.

[0006] Therefore, one of the objectives of the present disclosure is to provide a terminal and a wireless communication method that can properly perform PUSCH transmission 、 base station And a system as one of the purposes.

Means for Solving the Problems

[0007] A terminal according to an aspect of the present disclosure determines the mapping between a physical uplink shared channel A receiving unit that receives information indicating that a plurality of codewords including a first codeword and a second codeword are scheduled by one downlink control information, and the plurality of codewords are pre-coded and layer number fields of the downlink control information And a control unit that maps to the number of layers indicated by the number of layers, and the control unit uses the layer and Measurement reference signal (Sounding Reference Signal (SRS)) resource indicator (SRS Resource Indicator (SRI)) of the downlink control information a port of the specified of S RS resource. .

Effects of the Invention

[0008] According to an aspect of the present disclosure, PUSCH transmission can be properly performed.

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] (Repeated Transmission) In Rel.15, retransmission is supported in data transmission. For example, a base station (network (NW), gNB) may retransmit DL data (e.g., downlink shared channel (PDSCH)) a predetermined number of times. Alternatively, the UE may retransmit UL data (e.g., uplink shared channel (PUSCH)) a predetermined number of times.

[0011] The UE may be scheduled to transmit a predetermined number of repeated PUSCH transmissions by a single DCI. The number of repetitions is also referred to as the repetition factor K or the aggregation factor K.

[0012] Also, the nth repetition may also be referred to as the nth transmission occasion, etc., and may be identified by the repetition index k (0 ≤ k ≤ K−1). The retransmission may be applied to a PUSCH dynamically scheduled by DCI (e.g., a dynamic grant-based PUSCH), or may be applied to a configured grant-based PUSCH.

[0013] The UE receives information indicating the repetition factor K (e.g., aggregationFactorUL or aggregationFactorDL) quasi-statically by upper layer signaling. Here, the upper layer signaling may be any of, for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or a combination thereof.

[0014] 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.

[0015] 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 (e.g., at least one of reception, demapping, demodulation, and decoding) or the transmission process (e.g., at least one of transmission, mapping, modulation, and coding) of the PDSCH in K consecutive slots: ·Allocation of time-domain resources (e.g., start symbol, number of symbols in each slot, etc.), ·Allocation of frequency-domain resources (e.g., 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) or transmission configuration indicator.

[0016] For K consecutive slots, the same symbol assignment may be applied. The UE may determine the symbol assignment for 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., Time Domain Resource Allocation (TDRA) field) in the DCI. Note that the UE may also determine the first slot based on the K2 information determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI.

[0017] On the other hand, for the K consecutive slots, the redundancy version (RV) applied to the transport block (TB) based on the same data may be the same or at least partially 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.

[0018] In Rel.15, PUSCH can be repeatedly transmitted over multiple slots (in slot units). From Rel.16 onwards, repeated transmission of PUSCH in units shorter than a slot (e.g., sub - slot unit, mini - slot unit or a unit of a predetermined number of symbols) is supported.

[0019] The UE may determine the symbol assignment 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 determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI for PUSCH. Note that the UE may also determine the predetermined slot based on the Ks information determined based on the value m of a predetermined field (e.g., TDRA field) in the DCI.

[0020] The UE may dynamically receive information indicating the repetition factor K (e.g., numberofrepetitions) via downlink control information. The repetition factor may be determined based on the value m of a predetermined field (e.g., the TDRA field) within the DCI. For example, a table defining the correspondence between the bit values notified by the DCI, the repetition factor K, the starting symbol S, and the number of symbols L may be supported.

[0021] Slot-based repeated transmission may be referred to as repeated transmission type A (e.g., PUSCH repetition Type A), and subslot-based repeated transmission may be referred to as repeated transmission type B (e.g., PUSCH repetition Type B).

[0022] The UE may have at least one of repeated transmission type A and repeated transmission type B applied. For example, the repeated transmission type applied by the UE may be notified from the base station to the UE via higher layer signaling (e.g., PUSCHRepTypeIndicator).

[0023] For each DCI format that schedules the PUSCH, either repeated transmission type A or repeated transmission type B may be set for the UE.

[0024] For example, for the first DCI format (e.g., DCI format 0_1), when higher layer signaling (e.g., PUSCHRepTypeIndicator-AorDCIFormat0_1) is set to 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 set, or when PUSCH-RepTypA is set), the UE applies repeated transmission type A for the PUSCH repeated transmission scheduled by the first DCI format.

[0025] (PUSCH Precoder) In NR, it is considered that the UE supports at least one of codebook (Codebook (CB)) - based transmission and non - codebook (Non - Codebook (NCB)) - based transmission.

[0026] For example, the UE may determine a precoder (precoding matrix) for at least one of CB - based and NCB - based Physical Uplink Shared Channel (PUSCH) transmission using at least a Sounding Reference Signal (SRS) Resource Indicator (SRS Resource Indicator (SRI)).

[0027] In the case of CB - based transmission, the UE may determine a precoder for PUSCH transmission based on, for example, the SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of NCB - based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI.

[0028] SRI, TRI, TPMI, etc. may be notified to the UE using Downlink Control Information (DCI). The SRI may be specified by the SRS Resource Indicator field (SRI field) of the DCI, or may be specified by the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH. TRI and TPMI may be specified by the precoding information and number of layers field ("Precoding information and number of layers" field) of the DCI. For simplicity, the precoding information and number of layers field is also referred to as the precoding information field.

[0029] The UE may report UE capability information regarding the precoder type, and the base station may set the precoder type based on the UE capability information by upper layer signaling. The UE capability information may be information on the precoder type used by the UE in PUSCH transmission (which may be represented by the RRC parameter "pusch-TransCoherence").

[0030] In the present disclosure, the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0031] MAC signaling may use, for example, a MAC control element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), etc.

[0032] The UE may determine a precoder to be used for PUSCH transmission based on the precoder type information (which may be represented by the RRC parameter "codebookSubset") included in the PUSCH configuration information (the "PUSCH-Config" information element of RRC signaling) notified by upper layer signaling. The UE may set a subset of the PMI specified by the TPMI by the codebookSubset.

[0033] Note that the precoder type may be specified by any one of full coherent, partial coherent, and non coherent or a combination of at least two of them (for example, it may be represented by parameters such as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", etc.).

[0034] Full coherence may mean that all antenna ports used for transmission are synchronized (which may also be expressed as being able to align phases, being able to perform phase control for each coherent antenna port, being able to appropriately apply a precoder for each coherent antenna port, etc.). Partial coherence may mean that some of the antenna ports used for transmission are synchronized among themselves, but not with other ports. Non - coherence may mean that the synchronization of each antenna port used for transmission cannot be achieved.

[0035] Note that a UE supporting a full - coherence precoder type may be assumed to support partial - coherence and non - coherence precoder types. A UE supporting a partial - coherence precoder type may be assumed to support a non - coherence precoder type.

[0036] The precoder type may be renamed in terms of coherence, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc.

[0037] The UE may determine a precoding matrix corresponding to the TPMI index obtained from the DCI (e.g., DCI format 0_1; the same applies hereinafter) that schedules UL transmission from among a plurality of precoders (which may be referred to as a precoding matrix, codebook, etc.) for CB - based transmission.

[0038] Figure 1 is a diagram showing an example of the association between the precoder type and the TPMI index. Figure 1 corresponds to a table of the precoding matrix W for single - layer (rank 1) transmission using 4 antenna ports with DFT - s - OFDM (Discrete Fourier Transform spread OFDM, where transform precoding is effective).

[0039] In FIG. 1, when the precoder type (codebookSubset) is fullyAndPartialAndNonCoherent, the UE is notified of any TPMI from 0 to 27 for single-layer transmission. Also, when the precoder type is partialAndNonCoherent, the UE is configured with any TPMI from 0 to 11 for single-layer transmission. When the precoder type is nonCoherent, the UE is configured with any TPMI from 0 to 3 for single-layer transmission.

[0040] As shown in FIG. 1, a precoding matrix in which each component of each column is not 0 only once may be called a non-coherent codebook. A precoding matrix in which each component of each column is not 0 by a predetermined number (not all) may be called a partial-coherent codebook. A precoding matrix in which all components of each column are not 0 may be called a fully coherent codebook.

[0041] The non-coherent codebook and the partial-coherent codebook may be called an antenna selection precoder. The fully coherent codebook may be called a non-antenna selection precoder.

[0042] In addition, in the present disclosure, the partial coherent codebook may correspond to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission, which is a codebook subset of partial coherence (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") set by a UE, excluding the codebook corresponding to the TPMI specified by a UE that has set a non-coherent codebook subset (for example, RRC parameter "codebookSubset" = "nonCoherent"). That is, in the case of single-layer transmission with 4 antenna ports, it may correspond to the codebooks with TPMI from 4 to 11.

[0043] In addition, in the present disclosure, the full coherent codebook may correspond to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission, which is a codebook subset of full coherence (for example, RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") set by a UE, excluding the codebook corresponding to the TPMI specified by a UE that has set a partial coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent"). That is, in the case of single-layer transmission with 4 antenna ports, it may correspond to the codebooks with TPMI from 12 to 27.

[0044] (Spatial relationship for SRS, PUSCH) The UE may receive information (SRS configuration information, for example, parameters within the "SRS-Config" of the RRC control element) used for transmitting a measurement reference signal (for example, Sounding Reference Signal (SRS)).

[0045] 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" in the RRC control element) and information regarding one or more SRS resources (SRS resource information, e.g., "SRS-Resource" in the RRC control element).

[0046] One SRS resource set may be related to a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped). Each SRS resource may be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0047] The SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of SRS.

[0048] Here, the SRS resource type may indicate any one of Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), and Aperiodic SRS (A-SRS, AP-SRS). Note that the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation), and transmit A-SRS based on an SRS request in DCI.

[0049] Also, the usage (such as "usage" of RRC parameters and "SRS-SetUse" of L1 (Layer-1) parameters) may be, for example, beam management, codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching, etc. The SRS for the usage of codebook-based transmission or non-codebook-based transmission may be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0050] For example, in the case of codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on SRI.

[0051] The SRS resource information may include the SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, transmission Comb, SRS resource mapping (such as time and / or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, sequence ID, spatial relationship information of SRS, etc.

[0052] 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).

[0053] 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.

[0054] Note that in the present disclosure, the SSB index, the SSB resource ID, and the SSBRI (SSB Resource Indicator) may be read interchangeably with each other. Also, the CSI-RS index, the CSI-RS resource ID, and the CRI (CSI-RS Resource Indicator) may be read interchangeably with each other. Also, the SRS index, the SRS resource ID, and the SRI may be read interchangeably with each other.

[0055] The spatial relation information of the SRS may include a serving cell index, a BWP index (BWP ID), etc. corresponding to the predetermined reference signal.

[0056] In NR, the transmission of the uplink signal may be controlled based on the presence or absence of Beam Correspondence (BC). BC may be, for example, the ability of a certain node (e.g., a base station or a UE) to determine the beam (transmission beam, Tx beam) used for signal transmission based on the beam (reception beam, Rx beam) used for signal reception.

[0057] Note that BC may also be referred to as transmission / reception beam correspondence, beam reciprocity, beam calibration, calibrated / non-calibrated, reciprocity calibrated / non-calibrated, correspondence, consistency, etc.

[0058] For example, in the case without BC, the UE may transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, etc.) using the same beam (spatial domain transmission filter) as the SRS (or SRS resource) indicated by the base station based on the measurement results of one or more SRSs (or SRS resources).

[0059] On the other hand, in the case with BC, the UE may transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, etc.) using the same or corresponding beam (spatial domain transmission filter) as the beam (spatial domain reception filter) used for receiving a predetermined SSB or CSI-RS (or CSI-RS resource).

[0060] When the UE is configured with spatial relationship information regarding an SSB or CSI-RS and an SRS for a certain SRS resource (e.g., in the case with BC), 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.

[0061] When the UE is configured with spatial relationship information regarding another SRS (reference SRS) and the SRS (target SRS) for a certain SRS (target SRS) resource (for example, in the case without BC), 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.

[0062] 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.

[0063] For PUSCH, when using codebook-based transmission, two SRS resources may be configured by the RRC, and one of the two SRS resources may be indicated by the DCI (a predetermined field of 1 bit). For PUSCH, when using non-codebook-based transmission, four SRS resources may be configured by the RRC, and one of the four SRS resources may be indicated by the DCI (a predetermined field of 2 bits). To use a spatial relationship other than the two or four spatial relationships configured by the RRC, an RRC reconfiguration is required.

[0064] Note that for the spatial relationship of the SRS resource used for PUSCH, DL-RS can be configured. For example, for SP-SRS, the UE may configure the spatial relationships of a plurality (for example, up to 16) of SRS resources by the RRC, and one of the plurality of SRS resources can be indicated by the MAC CE.

[0065] (UL TCI State) In Release 16 NR, using the UL TCI state as a UL beam indication method is being considered. The notification of the UL TCI state is similar to the notification of the UE's DL beam (DL TCI state). Note that the DL TCI state may be mutually interchangeable with the TCI state for PDCCH / PDSCH.

[0066] The channel / signal for which the UL TCI state is set (specified) (which may be referred to as the target channel / RS) may be at least one of, for example, PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), random access channel (Physical Random Access Channel (PRACH)), SRS, etc.

[0067] Also, the RS (source RS) having a QCL relationship with the channel / signal may be, for example, a DL RS (e.g., SSB, CSI-RS, TRS, etc.) or a UL RS (e.g., SRS, SRS for beam management, etc.).

[0068] In the UL TCI state, the RS having a QCL relationship with the channel / signal may be associated with the panel ID for receiving or transmitting the RS. The association may be explicitly set (or specified) by upper layer signaling (e.g., RRC signaling, MAC CE, etc.) or may be implicitly determined.

[0069] The correspondence between the RS and the panel ID may be set and included in the UL TCI state information, or may be set and included in at least one of the resource setting information, spatial relationship information, etc. of the RS.

[0070] The QCL type indicated by the UL TCI state may be the existing QCL types A - D, or other QCL types, or may include a predetermined spatial relationship, related antenna ports (port indices), etc.

[0071] For UL transmission, when the UE is specified with a relevant panel ID (e.g., specified by DCI), the UE may perform the UL transmission using the panel corresponding to the panel ID. The panel ID may be associated with the UL TCI state. When the UE is specified (or activated) with a UL TCI state for a predetermined UL channel / signal, the UE may identify the panel to be used for the UL channel / signal transmission according to the panel ID associated with the UL TCI state.

[0072] (Multiple-panel transmission) <Transmission mode> In Rel.15 and Rel.16 UEs, only one beam and one panel are used for UL transmission at one point in time (Figure 2A). After Rel.17, for the improvement of UL throughput and reliability, simultaneous UL transmission of multiple beams and multiple panels is being considered for one or more TRPs. Hereinafter, the simultaneous transmission of PUSCH will be described, but the same processing may be performed for PUCCH.

[0073] For simultaneous UL transmission using multiple beams and multiple panels, reception by one TRP with multiple panels (Figure 2B), or reception by two TRPs with ideal backhaul (Figure 2C), is being considered. A single PDCCH for the scheduling of multiple PUSCHs (e.g., simultaneous transmission of PUSCH#1 and PUSCH#2) is being considered. Support for panel-specific transmission and the introduction of panel IDs are being considered.

[0074] The base station may set or instruct panel-specific transmission for UL transmission using UL TCI or panel ID. The UL TCI (UL TCI state) may be based on signaling similar to the DL beam indication supported in Rel. 15. The panel ID may be implicitly or explicitly applied to at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH transmissions. When the panel ID is explicitly notified, the panel ID may be set in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).

[0075] The multi-panel UL transmission method or multi-panel UL transmission method candidate may be at least one of the following methods 1 to 3 (multi-panel UL transmission methods 1 to 3). Only one of methods 1 to 3 may be supported. A plurality of methods including at least one of methods 1 to 3 may be supported, and one of the plurality of methods may be set for the UE.

[0076] 《Method 1》 Coherent multi-panel UL transmission

[0077] Multiple panels may be synchronized with each other. All layers are mapped to all panels. Multiple analog beams are indicated. The SRS resource indicator (SRI) field may be extended. This method may use up to 4 layers for UL.

[0078] In the example of Fig. 3A, the UE maps 1 codeword (CW) or 1 transport block (TB) to L layers (PUSCH(1,2,…,L)) and transmits L layers from each of the two panels. Panel #1 and Panel #2 are coherent. Method 1 can obtain the gain by diversity. The total number of layers in the two panels is 2L. When the maximum value of the total number of layers is 4, the maximum value of the number of layers in one panel is 2.

[0079] Method 2 Non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB)

[0080] The multiple panels may not be synchronized. Different layers are mapped to different panels and to one CW or TB for PUSCH from multiple panels. The layer corresponding to one CW or TB may be mapped to multiple panels. This method may use up to 4 layers or up to 8 layers for UL. When supporting up to 8 layers, this method may support one CW or TB using up to 8 layers.

[0081] In the example of Figure 3B, the UE maps 1 CW or 1 TB to k layers (PUSCH(1,2,…,k)) and L-k layers (PUSCH(k+1,k+2,…,L)), transmits the k layers from panel #1, and transmits the L-k layers from panel #2. Method 2 can obtain gains by multiplexing and diversity. The total number of layers in the two panels is L.

[0082] Method 3 Non-coherent multi-panel UL transmission of two codewords (CWs) or transport blocks (TBs)

[0083] The multiple panels may not be synchronized. Different layers are mapped to different panels and to two CWs or TBs for PUSCH from multiple panels. The layer corresponding to one CW or TB may be mapped to one panel. The layers corresponding to multiple CWs or TBs may be mapped to different panels. This method may use up to 4 layers or up to 8 layers for UL. When supporting up to 8 layers, this method may support up to 4 layers per CW or TB.

[0084] In the example of FIG. 3C, the UE maps CW#1 or TB#1 among 2 CWs or 2 TBs to k layers (PUSCH(1, 2, …, k)), maps CW#2 or TB#2 to L - k layers (PUSCH(k + 1, k + 2, …, L)), transmits the k layers from panel #1, and transmits the L - k layers from panel #2. Method 3 can obtain gains by multiplexing and diversity. The total number of layers in the two panels is L.

[0085] <DCI Extension> When applying the above-described Methods 1 to 3, an existing DCI may be extended. For example, at least one of the following Options 1 to 6 may be applied.

[0086] [Option 1] Multiple PUSCHs may be indicated (scheduled) by a single PDCCH (DCI) for Method 1. The SRI field may be extended to indicate multiple PUSCHs. Multiple SRI fields in the DCI may be used to indicate multiple PUSCHs from multiple panels. For example, a DCI that schedules two PUSCHs may include two SRI fields.

[0087] The extension of the SRI field for Method 2 may be different from the extension of the SRI field for Method 1 in the following points.

[0088] Among the L layers, for layers 1, 2, …, k, the UE may use the SRI (SRS#i) first indicated by the SRI field in the DCI as a spatial filter for UL transmission from panel 1. Among the remaining layers k + 1, k + 2, …, L of the L layers, the UE may use the SRI (SRS#j) second indicated by the SRI field in the DCI as a spatial filter for UL transmission from panel 2. k may follow a predefined rule or may be explicitly indicated by the DCI.

[0089] The extension of the SRI field for Mode 3, in addition to the extension of the SRI field for Mode 2 to support two CWs or TBs for different TRPs, in order to indicate multiple PUSCHs, at least one of the modulation and coding scheme (MCS) field, precoding information and layer number field, Transmission Power Control (TPC) command for scheduled PUSCH field, Frequency Domain Resource Assignment (FDRA) field, and Time Domain Resource Assignment (TDRA) field in the DCI may be extended. Different TRPs may have different path losses or different SINRs.

[0090] [Option 2] Information on the type of repeated transmission of PUSCH may be notified or set to the UE by upper layer signaling. For example, when the repeated transmission type B (e.g., PUSCH-RepTypeB) is not set by upper layer signaling, the UE may apply the repeated transmission type A. The repeated transmission type may be set for each DCI format (or type of PUSCH). The type of PUSCH may include a dynamic grant-based PUSCH and a configured grant-based PUSCH.

[0091] Information on the repetition factor, information on the allocation of PUSCH, information on the spatial relationship (or precoder) used for PUSCH transmission, and information on the redundancy version used for PUSCH transmission may be notified to the UE by DCI or a combination of DCI and upper layer parameters.

[0092] Regarding information on the repetition factor (e.g., K) and information on PUSCH allocation (e.g., start symbol S and PUSCH length L), multiple candidates are defined in a table, and a specific candidate may be selected by DCI. In the following description, the case where the repetition factor (K) of PUSCH is 4 is taken as an example for explanation, but the applicable repetition factor is not limited to 4.

[0093] Regarding information on the spatial relationship (hereinafter also referred to as spatial relationship information), multiple candidates are set by higher layer signaling, and one or more spatial relationship information may be activated by at least one of DCI and MAC CE.

[0094] [Option 3] The number of bits of the TPC command field included in one DCI that schedules PUSCH transmissions across multiple TRPs, and the association between the TPC command field and an index related to TPC (e.g., the closed-loop index) will be described. The UE may control multiple PUSCH transmissions based at least on the index.

[0095] The number of bits of the TPC command field included in one DCI that schedules PUSCH transmissions across multiple TRPs may be extended to a specific number (e.g., 2M) of bits compared to the number of bits in Rel.15 / 16. In the present disclosure, M may be the number of TRPs or the number of SRIs that can be indicated for PUSCH transmissions across multiple TRPs.

[0096] For example, for codebook-based transmission, when the SRI for PUSCH transmission for two TRPs is indicated by DCI, the TPC command field may be extended to 4 bits.

[0097] The association between the extended TPC command field and a specific index related to TPC (e.g., the closed-loop index) may follow at least one of the following Association 1 or Association 2. Hereinafter, the closed-loop index will be described, but the closed-loop index of the present disclosure may be read as any specific index related to TPC.

[0098] [[Association 1]] When the extended TPC command field is divided into specific numbers of bits (e.g., 2, 4, etc.) at a time, the x-th (x is an arbitrary integer) smallest (or largest) specific number of bits may be associated with the x-th SRI / SRI combination indicated by DCI.

[0099] [[Association 2]] When the extended TPC command field is divided into specific numbers of bits (e.g., two) at a time, the x-th smallest (or largest) specific number of bits may be associated with the SRI corresponding to the x-th smallest (or largest) closed-loop index indicated by DCI.

[0100] [Option 4] When performing repeated transmission of PUSCH over multiple TRPs, the same number of antenna ports may be set / indicated for different TRPs (different PUSCHs). In other words, the same number of antenna ports may be commonly set / indicated for multiple TRPs (multiple PUSCHs). At this time, the UE may assume that the same number of antenna ports is commonly set / indicated for multiple TRPs (multiple PUSCHs). In this case, the UE may determine the TPMI for PUSCH transmission according to at least one of the following Instruction Method 1-1 or Instruction Method 1-2.

[0101] [[Instruction Method 1-1]] The precoding information and layer number field included in the scheduling DCI may have the same number of bits as defined in Rel.15 / 16. At this time, for the UE, one piece of precoding information and layer number field included in one DCI may be indicated. In other words, the UE may determine the TPMI based on one piece of precoding information and layer number field included in one DCI. Then, the UE may apply the precoding information and layer number field / TPMI to the PUSCH transmissions of different TRPs.

[0102] [[Indication Method 1-2]] The precoding information and layer number field included in the scheduling DCI may have a number of bits extended to a specific number compared to Rel.15 / 16. The specific number may be represented by X×M.

[0103] The above X may be determined based on the size of the precoding information and layer number field included in the DCI for UL transmission for one TRP. For example, the above X may be determined based on at least one of the number of antenna ports and the number set by a specific upper layer parameter (for example, at least one of ul-FullPowerTransmission, maxRank, codebookSubset, transformPrecoder).

[0104] Also, the above X may be a fixed value. The UE may assume that the above X has a fixed size regardless of the number of antenna ports set in the upper layer. Also, the UE may assume that the above X has a fixed size regardless of the value of the antenna port number field (the number of antenna ports indicated by the antenna port number field).

[0105] Also, when performing repeated transmission of PUSCH over multiple TRPs, different / same number of antenna ports may be set / indicated for different TRPs (different PUSCHs). In other words, the number of antenna ports may be set / indicated separately for multiple TRPs (multiple PUSCHs). At this time, the UE may assume that the number of antenna ports is set / indicated independently for each of the multiple TRPs (multiple PUSCHs). In this case, the UE may determine the TPMI for PUSCH transmission according to the indication method 2 described below.

[0106] [[Indication method 2]] The precoding information and layer number field included in the scheduling DCI may have an extended number of bits by a specific number compared to Rel.15 / 16. The specific number may be represented by X1+X2+…+X M and may also be represented in this way.

[0107] The above X i (where i is any integer from 1 to M) may be determined based on the size of the precoding information and layer number field included in the DCI for UL transmission for the i-th TRP. For example, the above X i may be determined based on at least one of the number of antenna ports and the number set by a specific upper layer parameter (e.g., at least one of ul-FullPowerTransmission, maxRank, codebookSubset, transformPrecoder). Also, the above X i may be set to a fixed value.

[0108] The above M may be the number of TRPs or the number of spatial relation information (SRI) that can be indicated for PUSCH transmission over multiple TRPs.

[0109] [Option 5] The UE may determine the SRI applied to the PUSCH based on at least one of the SRI field of the DCI that schedules the PUSCH and the CORESET pool index of the control resource set (CORESET) for the DCI (e.g., the CORESET for detecting the DCI).

[0110] The UE may determine the SRI applied to each PUSCH based on the multiple SRI fields included in the DCI that schedules multiple PUSCHs.

[0111] The UE may determine the SRI applied to each PUSCH based on one SRI field included in the DCI that schedules multiple PUSCHs.

[0112] The UE may determine the transmission power of the PUSCH based on the SRI field of the DCI that schedules the PUSCH. For example, the UE may determine the transmission power control (TPC) related parameters of the PUSCH based on the SRI field of the DCI that schedules the PUSCH.

[0113] [Option 6] 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.

[0114] For example, when it is indicated by the field included in the DCI to apply either the first SRI field or the second SRI field out of multiple (e.g., two) SRI fields (the first SRI field, the second SRI field), the UE may determine that the repeated transmission of multiple PUSCHs is performed with the applied SRI. In other words, when it is indicated by the field included in the DCI to apply one SRI field out of multiple SRI fields, the UE may determine to perform the repeated transmission of the PUSCH at a single TRP.

[0115] Also, for example, when it is indicated by a field included in DCI to apply both a first SRI field and a second SRI field among a plurality (e.g., two) of SRI fields (a first SRI field, a 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., a plurality of TRPs). In other words, when it is indicated by a field included in DCI to apply a plurality of SRI fields, the UE may determine to perform the repeated transmission of PUSCHs in a plurality of TRPs.

[0116] (Problem) By the way, in Rel.15 / 16 NR, transmission in units of a transport block (TB) (TB-based transmission) and transmission in units of a code block group (CBG) (CBG-based transmission) are defined. Note that the transmission in the present disclosure may be mutually replaced with retransmission.

[0117] Note that in the present disclosure, the CBG may be mutually replaced with a CB. Also, the TB may be mutually replaced with a code word (CW).

[0118] In Rel.15 / 16 NR, one CW may be transmitted using one PUSCH. In Rel.15 / 16 NR, one or two CWs may be transmitted using one PDSCH.

[0119] As described above, DCI extensions related to Examples 1 to 3 are being considered. However, the details of the operation of transmitting multiple CWs on a PUSCH have not been fully considered. For example, when transmitting multiple CWs on a PUSCH, how to control CW generation, layer mapping, precoding, etc. has not been fully considered. If the PUSCH transmission for multiple CWs is not properly performed, there is a risk that the throughput will decrease or the communication quality will deteriorate.

[0120] Therefore, the inventors of the present invention conceived a method for a UE to properly perform PUSCH transmission.

[0121] 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 independently or in combination.

[0122] In the present disclosure, "A / B" may be read as "at least one of A and B".

[0123] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, notify, etc. may be read as each other.

[0124] In the present disclosure, CW, TB, beam, panel, UE panel, PUSCH, PDSCH, TRP, port, SRI, SR resource set, SRS resource, RS port group, DMRS port group, SRS port group, resource, RS resource group, DMRS resource group, SRS resource group, beam group, TCI state group, spatial relationship group, SRS resource indicator (SRI) group, antenna port group, antenna group, CORESET group, CORESET pool, and terms with "Identifier (ID)" added to these terms may be read as each other.

[0125] In the present disclosure, spatial relationship, spatial setting, spatial relation information, spatialRelationInfo, SRI, SRS resource, precoder, UL TCI, TCI state, unified TCI state (U-TCI state), common TCI state, joint DL / UL TCI state, QCL, QCL assumption, etc. may be read as each other. The TCI state and TCI may be read as each other.

[0126] The panel may be associated with at least one of a panel ID, a UL TCI state, a UL beam, a DL beam, a DL RS resource, and spatial relation information.

[0127] In the present disclosure, sequence, list, set, group, cluster, subset, etc. may be read as each other.

[0128] In the present disclosure, index, ID, indicator, resource ID may be read as each other.

[0129] The transmission method and the new transmission method of the present disclosure may mean at least one of the above-mentioned methods 1 to 3. In the PUSCH transmission in the following embodiments, at least one of the above-mentioned methods 1 to 3 may be applied. Note that the application of at least one of the above-mentioned methods 1 to 3 for PUSCH may be set by, for example, a higher layer parameter.

[0130] In the present disclosure, the two CWs transmitted using PUSCH may be CWs with different contents or CWs with the same contents. The PUSCH for transmitting the two CWs may be regarded as one PUSCH transmitted simultaneously or repeatedly.

[0131] The DCI in the following embodiments may be limited to a specific DCI format among the DCI formats (e.g., DCI format 0_0, 0_1, 0_2) for scheduling PUSCH, or may correspond to multiple DCI formats. In the case of corresponding to multiple DCI formats, control common to the DCI formats (same control, same processing) may be performed, or different control may be performed for each DCI format.

[0132] In the following embodiments, "plurality" and "two" may be read interchangeably.

[0133] In addition, the number of layers of PUSCH transmission in the following embodiments is not limited to being greater than 4. For example, the PUSCH transmission of two CWs in the present disclosure may be performed with a number of layers of 4 or less (e.g., 2). Regarding the above-described methods 1-3, the number of layers L may be greater than 4 or may be 4 or less. Also, the maximum number of layers is not limited to 4 or more, and less than 4 may be applicable.

[0134] In addition, the PUSCH transmission in the following embodiments may be premised on the use of multiple panels or may not be (applicable regardless of the panel). Also, in the present disclosure, transmitting / receiving PUSCH may be interpreted as transmitting / receiving a part of the signals of the layers / ports for the PUSCH.

[0135] (Wireless communication method) <The first embodiment> The first embodiment relates to UCI on PUSCH.

[0136] In Rel.15 / 16 NR, when certain conditions are met, such as when the UE multiplexes UCI on a PUCCH transmission that overlaps in time with a PUSCH transmission, the UE is supported to multiplex at least a part of this UCI on the PUSCH and transmit it (UCI on PUSCH). UCI on PUSCH may also be referred to as multiplexing UCI on the PUSCH, transmitting UCI on the PUSCH, piggybacking UCI on the PUSCH, etc.

[0137] Also, in Rel.15 / 16 NR, for UCI on PUSCH, it is specified how the coded bits of one TB of the UL-SCH and the coded bits for UCI (e.g., HARQ-ACK, CSI) are multiplexed.

[0138] However, for future wireless communication systems (e.g., Rel.18 NR), when the UE is scheduled to transmit a PUSCH with two TBs, there has been no further study on whether the UCI is multiplexed with both TBs or only with one of the TBs.

[0139] Therefore, the inventors have found a first embodiment.

[0140] In the first embodiment, when the UE is scheduled to transmit a PUSCH with two TBs and this PUSCH is used for UCI on PUSCH, the UE may multiplex this UCI on both of the two TBs.

[0141] Figures 4A and 4B are diagrams showing an example of the multiplexing of UCI and PUSCH according to the first embodiment. In this example, for the two CWs (2TBs) scheduled, the UE maps CW0 / TB0 to k layers (PUSCH(1,2,…,k)) and CW1 / TB1 to L-k layers (PUSCH(k+1,k+2,…,L)). Figure 4A shows an example of multiplexing UCI on both of the two TBs.

[0142] The UCIs multiplexed to each of the two TBs may be different or the same. For example, the UE may divide one UCI (which may also be referred to as the whole UCI) into two parts (the first part and the second part), multiplex the first part to the first TB (which may be referred to as TB0), and multiplex the second part to the second TB (which may be referred to as TB1). Also, the UE may copy one UCI to prepare the first UCI and the second UCI, and multiplex the first UCI to the first TB and the second UCI to the second TB (that is, the whole UCI may be multiplexed to both the first TB and the second TB). The first / second part (or the first / second UCI) may include some common information or completely different information.

[0143] In addition, the first / second part (or the first / second UCI) may be associated with the first / second TRP. The first / second TB may be associated with the first / second TRP. And the UE may multiplex the first / second part (or the first / second UCI) to the first / second TB associated with the same TRP.

[0144] In the first embodiment, when the UE schedules a PUSCH for transmitting two TBs and this PUSCH is used for UCI on PUSCH, this UCI may be multiplexed to only one TB. FIG. 4B shows an example of multiplexing the UCI to one of the two TBs (TB0).

[0145] The UE may determine that this one TB is any of the following: · The first TB (TB0), · The second TB (TB1), · The TB associated with the first TRP, · The TB associated with the second TRP, · The TB associated with the same TRP as the TRP associated with the above UCI (or the PUCCH that should have multiplexed the above UCI).

[0146] Note that which TB is used for UCI on PUSCH (for example, the association between UCI and TB) may be determined in advance by the specification, or may be notified from the base station to the UE using upper layer signaling (for example, RRC parameters, MAC CE), physical layer signaling (for example, DCI), or a combination thereof, or may be determined based on the UE capability.

[0147] Also, the association between the TRP and the TB, the association between the UCI (or PUCCH) and the TRP, etc. may be determined in advance by the specification, or may be notified from the base station to the UE using upper layer signaling (for example, RRC parameters, MAC CE), physical layer signaling (for example, DCI), or a combination thereof, or may be determined based on the UE capability.

[0148] Note that in the first embodiment, the conditions for using UCI on PUSCH may be the same as or different from those in Rel.15 / 16 / 17 NR. The multiplexing method / procedure of the bits to be encoded for UCI for each TB (one TB) may be performed in the same way as or differently from that in Rel.15 / 16 / 17 NR.

[0149] According to the first embodiment described above, the UE can appropriately implement UCI on PUSCH even for PUSCH transmission for two TBs.

[0150] <Second Embodiment> The second embodiment relates to the layer mapping of PUSCH.

[0151] In Rel.15 / 16 NR, for PUSCH, it is supported to map the complex-valued modulation symbols (hereinafter, also simply written as modulation symbols) corresponding to one transmitted CW to up to 4 layers. For PDSCH, it is supported to map the complex-valued modulation symbols corresponding to up to two transmitted CWs to up to 8 layers.

[0152] Specifically, the layer mapping for PUSCH / PDSCH maps the complex-valued modulation symbols d (q) (0),..., d (q) (M symb (q) -1) to the layer x(i)=[x (0) (i)... x (ν-1) (i)] T , i = 0, 1,..., M symb layer -1, which corresponds to mapping.

[0153] Here, M symb (q) is the number of modulation symbols for the codeword q (q = 0 or 1) transmitted on the physical channel, M symb layer is the number of modulation symbols per layer, and ν may correspond to the number of layers. Note that T represents the transpose matrix.

[0154] Figure 5 shows the correspondence of the mapping from the codeword to the layer for spatial multiplexing defined in Rel. 15 / 16 NR. It can be seen that the mapping from d to x differs depending on the number of layers and the number of codewords. In Rel. 15 / 16 NR, the layer mapping of layers 1-4 (CW = 1) in Figure 5 is supported for PUSCH, and the layer mapping of layers 1-8 (CW = 1 or 2) in Figure 5 is supported for PDSCH.

[0155] However, for future wireless communication systems (e.g., Rel. 18 NR), when a UE is scheduled to transmit a PUSCH with two TBs (CWs), how to perform layer mapping for these two CWs has not yet been studied.

[0156] Therefore, the inventors have found a second embodiment.

[0157] In the second embodiment, when the UE is scheduled to transmit a PUSCH with two TBs, it may utilize the correspondence of layer mapping defined in Rel. 15 / 16 NR shown in FIG. 5.

[0158] For example, when the UE is scheduled to transmit a PUSCH with one CW, it may apply the layer mapping of layers 1-4 (CW=1) in FIG. 5, and when the UE is scheduled to transmit a PUSCH with two CWs, it may apply the layer mapping of layers 5-8 (CW=2) in FIG. 5. In this case, the UE supports all the correspondences in FIG. 5 for the PUSCH.

[0159] Also, when the UE is scheduled to transmit a PUSCH with one CW, it may apply the layer mapping of layers 1-4 (CW=1) in FIG. 5, and when the UE is scheduled to transmit a PUSCH with two CWs, it may apply the layer mapping of layers 5-6 (CW=2) in FIG. 5. This is because when the maximum number of layers of the PUSCH is 6, the layer mapping of 7 or more layers is not applied. In this case, the UE supports a part (not all) of the correspondences in FIG. 5 for the PUSCH.

[0160] In the second embodiment, when the UE is scheduled to transmit a PUSCH with two TBs, it may utilize a new correspondence of layer mapping (e.g., a table).

[0161] This correspondence may define only the relationship of layers 5-8 for two CWs (it may be assumed that for the transmission of two CWs, it cannot be mapped to up to 4 layers / it can only be mapped to 5 or more layers), or the relationship of layers 2-4 may be defined. Note that when the relationship of 4 or fewer layers for the transmission of two CWs is defined in this correspondence, it may be assumed that the relationship of 5 or more layers is also defined.

[0162] The UE may switch between using the new correspondence relationship and the existing correspondence relationship in Figure 5. The conditions for this switching may be determined in advance by the specification, or information indicating the switching may be notified from the base station to the UE using upper layer signaling (e.g., RRC parameters, MAC CE), physical layer signaling (e.g., DCI), or a combination thereof, or it may be determined based on the UE capabilities.

[0163] In the present disclosure, mapping the first CW (CW0) to layer number k and the second CW (CW1) to layer number L - k may also be represented as k+(L - k) layers. Note that k+(L - k) layers may also mean mapping CW0 to layers 0, …, k - 1 and CW1 to layers k, …, L - 1. CW0 and CW1 may be reversed.

[0164] In the new correspondence relationship, when the number of CWs = 2 and the number of layers L = 5, the mapping from CW to layer may be at least one of 2+3 layers, 3+2 layers, 1+4 layers, and 4+1 layers. It is understood that in the existing table in Figure 5, when the number of CWs = 2 and the number of layers L = 5, only the 2+3 layer mapping was defined for the mapping from CW to layer.

[0165] In the new correspondence relationship, when the number of CWs = 2 and the number of layers L = 6, the mapping from CW to layer may be at least one of 3+3 layers, 2+4 layers, and 4+2 layers.

[0166] In the new correspondence relationship, when the number of CWs = 2 and the number of layers L = 7, the mapping from CW to layer may be at least one of 3+4 layers and 4+3 layers.

[0167] In the new correspondence relationship, when the number of CWs = 2 and the number of layers L = 8, the mapping from CW to layer may be 4+4 layers.

[0168] In the above new correspondence relationship, when the CW number = 2 and the number of layers L = 2, the mapping from CW to layers may be 1 + 1 layer.

[0169] In the above new correspondence relationship, when the CW number = 2 and the number of layers L = 3, the mapping from CW to layers may be at least one of 1 + 2 layers and 2 + 1 layers.

[0170] In the above new correspondence relationship, when the CW number = 2 and the number of layers L = 4, the mapping from CW to layers may be at least one of 2 + 2 layers, 1 + 3 layers and 3 + 1 layers.

[0171] Note that the mapping from CW to layers is not limited to the above examples. For example, when the number of layers for one CW is allowed to be 5 or more, the mapping from CW to layers for CW number = 2 and the number of layers L may be X + Y layers for any natural numbers X and Y that satisfy X + Y = L.

[0172] According to the second embodiment described above, the UE can perform an appropriate mapping from CW to layers even for PUSCH transmission for two TBs.

[0173] <The Third Embodiment> The third embodiment relates to the layer mapping of PUSCH. The third embodiment may be based on the second embodiment.

[0174] The relationship between the layer mapping of the above-described second embodiment and the number of layers specified by the precoding information field of the DCI that schedules PUSCH will be described.

[0175] The pre-coding information field may specify only one layer number. The specified layer number may represent the total number of layers of two CWs. The UE may determine the number of layers for the first CW and the number of layers for the second CW based on this total number of layers. The number of layers for each CW corresponding to the value of the total number of layers may be determined in advance by the specification, or may be notified from the base station to the UE using higher layer signaling (e.g., RRC parameters, MAC CE), physical layer signaling (e.g., DCI) or a combination thereof, or may be determined based on the UE capabilities.

[0176] Figures 6A and 6B show an example of the correspondence between the pre-coding information and the field values of the layer number, and the layer number and the TPMI. This correspondence is, for example, the correspondence for 8 antenna ports when "partialAndNonCoherent" is set for the UE, transform pre-coding is invalid, and the maxRank is 8, but is not limited thereto. It should be understood by those skilled in the art that the "bit field mapped to the index" shown in the figure indicates the field values of the pre-coding information and the layer number.

[0177] In Figure 6A, the specified layer number represents the total number of layers of two CWs. For example, if the UE is specified 5 layers, it may determine that the mapping from CW to layer is the predefined 2 + 3 layers.

[0178] The pre-coding information field may specify two layer numbers. The two specified layer numbers may represent the layer numbers of different CWs.

[0179] In Figure 6B, the two specified layer numbers represent the layer numbers of the respective CWs. For example, even if the total number of layers is 5, the UE can switch, such as 2 + 3 layers or 3 + 2 layers, based on the pre-coding information field.

[0180] Note that the content of the correspondence relationship in FIGS. 6A and 6B may be determined in advance by the specification, or may be notified from the base station to the UE using upper layer signaling (for example, RRC parameters, MAC CE), physical layer signaling (for example, DCI), or a combination thereof, or may be determined based on the UE capabilities.

[0181] Also, when two precoding information fields are included in the DCI, one field may be used to specify the number of layers for the first CW, and the other field may be used to specify the number of layers for the first CW.

[0182] According to the third embodiment described above, the UE can perform appropriate mapping from the CW to the layer even in the case of PUSCH transmission for two TBs.

[0183] <Fourth Embodiment> The fourth embodiment relates to the precoding of the PUSCH.

[0184] In Rel.15 / 16 NR, the precoding of the PUSCH is performed according to the following Equation 1. (Equation 1) [z (p0) (i)... z (pρ-1) (i)] T =W[y (0) (i)... y (ν-1) (i)] T

[0185] Here, y (λ) (i) is the modulation signal (modulation symbol) of layer λ after layer mapping (or transform precoding), and z (p) (i) is the modulation signal (modulation symbol) of antenna port p, and ρ is the number of antenna ports.

[0186] W is a precoding matrix. For non-codebook-based transmission, W is an identity matrix. For codebook-based transmission, for single-layer transmission on a single antenna port, W = 1, and in other cases, it is determined by the TPMI index obtained from the DCI that schedules the PUSCH or the upper-layer parameters.

[0187] For the variables / symbols whose explanations are omitted, it is as described in the second embodiment.

[0188] However, for future wireless communication systems (e.g., Rel. 18 NR), when the UE is scheduled to transmit PUSCH with two TBs (CWs), there is still no further discussion on how to determine the antenna ports, precoding matrices, etc. in the precoding as described above.

[0189] Therefore, the inventors have found a fourth embodiment.

[0190] In the fourth embodiment, for CB-based PUSCH, the UE transmits the PUSCH using the same antenna ports as one or more SRS ports of one or more SRS resources specified by the SRI instruction. Also, the UE performs precoding for the PUSCH using the precoding matrix specified by the TPMI. Note that the SRI may be given by DCI (e.g., in the case of dynamic grant PUSCH) or upper-layer signaling (e.g., in the case of configured grant PUSCH).

[0191] The fourth embodiment is broadly classified into the following embodiments 4.1 to 4.4: Embodiment 4.1: One SRS resource is specified by the SRI, and one precoding matrix is specified for the PUSCH by the TPMI. Embodiment 4.2: Two SRS resources are specified by the SRI, and one precoding matrix is specified for the PUSCH by the TPMI. Embodiment 4.3: Two SRS resources are specified by SRI, and two precoding matrices are specified for PUSCH by TPMI. Embodiment 4.4: One SRS resource is specified by SRI, and two precoding matrices are specified for PUSCH by TPMI.

[0192] Note that Embodiments 4.1 and 4.2 are particularly suitable when the UE reports supporting full coherence as UE capability information regarding the precoder type. Also, Embodiments 4.3 and 4.4 are particularly suitable when the UE reports supporting partial coherence / non-coherence as UE capability information regarding the precoder type.

[0193] Also, the specification of multiple SRI / TPMI may mean that multiple SRI / TPMI are specified by one SRI / precoding information field, or may mean that different SRI / TPMI are specified by two SRI / precoding information fields respectively.

[0194] [Embodiment 4.1] In Embodiment 4.1, the specified one precoding matrix may be applied for the mapping between all layers for PUSCH and all ports of the specified one SRS resource.

[0195] In Embodiment 4.1, the SRS resources of the SRS resource set whose usage corresponds to the "codebook" may support up to 6 or 8 antenna ports. Also, in Embodiment 4.1, the precoding matrix (e.g., W in Equation 1) for PUSCH may support up to 6 or 8 antenna ports and up to 6 or 8 layers.

[0196] In the present disclosure, the RRC parameters (e.g., SRS-Resource) for SRS resource configuration may include a parameter (nrofSRS-Ports) indicating the number of SRS ports exceeding 4, or may include a parameter (transmissionComb) indicating the number of combs exceeding 4, or may include a parameter (cyclicshift) indicating a value of the cyclic shift index exceeding 12.

[0197] FIG. 7 is a diagram showing an example of precoding according to Embodiment 4.1. In this example, the number of layers for PUSCH is 6, while the number of ports of one specified SRS resource is also 6. Further, the precoding matrix specified by TPMI is for 6 ports and 6 layers, and the UE precodes the modulation signals of layers L0 - L5 into the modulation signals of ports P0 - P5 using this precoding matrix.

[0198] [Embodiment 4.2] In Embodiment 4.2, one specified precoding matrix may be applied for the mapping between all the layers for PUSCH and all the ports of two specified SRS resources.

[0199] Note that the mapping between the SRS resource and the SRS port may be set explicitly (e.g., the port number corresponding to the SRS resource is set), or may be set implicitly. For the latter, for example, among two specified SRS resources (the first SRS resource and the second SRS resource), it may be determined that the ports #0 to #j (j is an integer) of the first SRS resource are mapped to the ports P0 to Pj after precoding, and the ports #0 to #k (k is an integer) of the second SRS resource are mapped to the ports Pj + 1 to Pj + k + 1 after precoding.

[0200] Here, the i-th (i is an integer) SRS resource may be the SRS resource included in the i-th SRS resource set starting from the lower or higher SRS resource set ID, or may be the i-th SRS resource starting from the lower or higher SRS resource ID in a certain SRS resource set.

[0201] In Embodiment 4.2, the SRS resources of the SRS resource set corresponding to the "codebook" in terms of usage may support up to 4 antenna ports. Also, in Embodiment 4.2, the precoding matrix for PUSCH may support up to 6 or 8 antenna ports and up to 6 or 8 layers.

[0202] FIG. 8 is a diagram showing an example of precoding according to Embodiment 4.2. In this example, the number of layers for PUSCH is 6, while the total number of ports of the two specified SRS resources is 8. Also, the precoding matrix specified by TPMI is for 8 ports and 6 layers, and the UE precodes the modulation signals of layers L0 - L5 into the modulation signals of ports P0 - P7 using this precoding matrix. Here, ports P0 - P3 correspond to ports #0 - #3 of SRS resource Y, and ports P4 - P7 correspond to ports #0 - #3 of SRS resource X. In this example, SRS resource Y corresponds to the first SRS resource described above, and SRS resource X corresponds to the second SRS resource described above.

[0203] [Embodiment 4.3] In Embodiment 4.3, the specified first precoding matrix may be applied for the mapping between the first group of layers for PUSCH and all ports of the specified first SRS resource. Also, in Embodiment 4.3, the specified second precoding matrix may be applied for the mapping between the second group of layers for PUSCH and all ports of the specified second SRS resource.

[0204] In Embodiment 4.3, the layers for PUSCH may be divided into two groups. The first / second group (which may be referred to as a layer group) may be determined based on a predetermined rule, or may be composed of the layers to which the first / second CWs are mapped as shown in the second / third embodiments. Also, the first / second group may be determined (associated) based on the CDM group specified by the antenna port field of the DCI.

[0205] Note that the mapping between the SRS resource and the SRS port may be determined in the same manner as in Embodiment 4.2.

[0206] In Embodiment 4.3, the SRS resources of the SRS resource set corresponding to the "codebook" in terms of usage may support up to 4 antenna ports. Also, in Embodiment 4.3, the precoding matrix for PUSCH may support up to 4 antenna ports and up to 4 layers.

[0207] FIG. 9 is a diagram showing an example of precoding according to Embodiment 4.3. In this example, the number of layers for PUSCH is 6, while the total number of ports of the two specified SRS resources is 8. Also, the two precoding matrices (denoted as precoding matrices M and N) specified by the TPMI are for 4 ports and 3 layers respectively, and the UE uses this precoding matrix to precode the modulation signals of layers L0 - L5 into the modulation signals of ports P0 - P7. Here, ports P0 - P3 correspond to ports #0 - #3 of the SRS resource Y, and ports P4 - P7 correspond to ports #0 - #3 of the SRS resource X. In this example, the SRS resource Y corresponds to the first SRS resource described above, and the SRS resource X corresponds to the second SRS resource described above.

[0208] [Embodiment 4.4] In Embodiment 4.4, the specified first precoding matrix may be applied for mapping between a first layer group for PUSCH and a first group of ports of one specified SRS resource. Also, in Embodiment 4.4, the specified second precoding matrix may be applied for mapping between a second layer group for PUSCH and a second group of ports of one specified SRS resource.

[0209] In Embodiment 4.4, the antenna ports after precoding may be divided into two groups. The first / second group of ports (which may also be called a port group) may be determined based on a predetermined rule or may be explicitly notified. For example, the configuration information of the SRS resource may include information indicating the number of ports in the first / second group.

[0210] For example, a 6-port SRS resource may include a first port group of 2 ports and a second port group of 4 ports, or may include a first port group of 4 ports and a second port group of 2 ports. Also, an 8-port SRS resource may include a first port group of 4 ports and a second port group of 4 ports. Note that the way of dividing the port groups is not limited to these.

[0211] In Embodiment 4.4, the SRS resources of the SRS resource set whose usage corresponds to the "codebook" may support up to 6 or 8 antenna ports. Also, in Embodiment 4.4, the precoding matrix for PUSCH may support up to 4 antenna ports and up to 4 layers.

[0212] FIG. 10 is a diagram showing an example of precoding according to Embodiment 4.4. In this example, while the number of layers for PUSCH is 6, the number of ports of one specified SRS resource is 8. Also, the two precoding matrices (denoted as precoding matrices M and N) specified by the TPMI are for 4 ports and 3 layers respectively, and the UE uses this precoding matrix to precode the modulation signals of layers L0 - L5 into the modulation signals of ports P0 - P7. Here, ports P0 - P3 correspond to the first port group (#0 - #3) of the SRS resource, and ports P4 - P7 correspond to the second port group (#4 - #7) of the SRS resource.

[0213] [Modification Example of the Fourth Embodiment] In Embodiments 4.1 - 4.4, the number of layers and the total number of ports after precoding (the total number of ports of the specified SRS resource) may be the same or different (for example, the number of layers > the total number of ports, the number of layers < the total number of ports).

[0214] In Embodiments 4.2 and 4.3, the number of ports of the first SRS resource and the number of ports of the second SRS resource may be the same or different.

[0215] In Embodiments 4.3 and 4.4, the number of rows of the first precoding matrix and the number of rows of the second precoding matrix may be the same or different. In Embodiments 4.3 and 4.4, the number of columns of the first precoding matrix and the number of columns of the second precoding matrix may be the same or different.

[0216] According to the fourth embodiment described above, even in PUSCH transmission with more than 4 layers, the UE can appropriately derive the signals of the ports by applying precoding to the layers.

[0217] <The Fifth Embodiment> The fifth embodiment relates to the spatial relationship of SRS resources. The fifth embodiment may be premised on the fourth embodiment.

[0218] As in embodiments 4.2 and 4.3, when two SRS resources are designated for PUSCH transmission, each SRS resource may be set with one spatial relationship.

[0219] As in embodiments 4.1 and 4.4, when one SRS resource is designated for PUSCH transmission, each SRS resource may be set with one spatial relationship or two spatial relationships. Note that the two spatial relationships may be applied to different port groups respectively.

[0220] The UE may determine that one or two spatial relationships are applied to the PUSCH based on the fact that one or two SRS resources related to (designated for) the PUSCH have one or two spatial relationships.

[0221] Note that when the spatial relationship of the PUSCH is set / designated via the UL TCI state or the joint DL / UL TCI state, the UE may designate one TCI state or two TCI states for PUSCH transmission.

[0222] The two TCI states may be applied to different port groups respectively. As in embodiments 4.2 and 4.3, when two SRS resources are designated for PUSCH transmission, the first port group (the first TCI state) may correspond to the first SRS resource, and the second port group (the second TCI state) may correspond to the second SRS resource. As in embodiments 4.1 and 4.4, when one SRS resource is designated for PUSCH transmission, the first TCI state may be applied to the first port group among the SRS resources, and the second TCI state may be applied to the second port group.

[0223] According to the fifth embodiment described above, even in the case of PUSCH transmission with more than 4 layers, the UE can appropriately determine the spatial relationship for the PUSCH.

[0224] <Sixth Embodiment> The sixth embodiment relates to the precoding of PUSCH DMRS.

[0225] In Rel.15 / 16 NR, the precoding of PUSCH DMRS is performed according to the following formula (2). (Formula 2) [a k,l (p0,μ) ... a k,l (pρ-1,μ) T =β PUSCH DMRS W[a ~ k,l (p~0,μ) ... a ~ k,l (p~ρ-1,μ) T

[0226] Here, a k,l (p,μ) is the value (which may be called a signal, etc.) of the resource element (k, l) of the subcarrier index k and symbol index l for the antenna port p and subcarrier spacing setting μ. a ~ k,l (p~,μ) is the intermediate quantity (which may be called the intermediate quantity to which the sequence is mapped) of the resource element (k, l) for the antenna port p ~ and subcarrier spacing setting μ. Note that a ~ and p ~ are originally intended to be denoted as ~ (tilde) above a and ~ above p (although they should be denoted as such, for simplicity, they are denoted as a ~ and p ~ ). β PUSCH DMRS is the amplitude scaling coefficient.

[0227] Note that the antenna port p with a tilde ~ ​​Corresponds to the DMRS port, and the antenna port p without a tilde corresponds to the SRS port / PUSCH port.

[0228] Regarding the variables / symbols for which the description is omitted, it is as described in the fourth embodiment.

[0229] However, for future wireless communication systems (e.g., Rel. 18 NR), when the UE is scheduled for PUSCH transmitting two TBs (CW), how to determine the antenna ports, precoding matrices, etc. in the precoding as described above has not been studied yet.

[0230] Therefore, the inventors have found the sixth embodiment.

[0231] The sixth embodiment corresponds to an embodiment in which some terms of the fourth embodiment are read differently. Below, "terms before reading" → "terms after reading" are shown: · Layer → DMRS port, · Layers L0 - L7 → DMRS port p ~ 0 - p ~ 7, · (SRS) port → SRS / PUSCH port.

[0232] Note that the DMRS port is specified by the antenna port field of the DCI. In the present disclosure, more than 4 DMRS ports may be specified.

[0233] According to the sixth embodiment described above, even in the case of PUSCH transmission with more than 4 DMRS ports, the UE can appropriately derive the signal of the SRS / PUSCH port by applying precoding to the DMRS port.

[0234] <Supplementary Note> In some of the above embodiments, it is assumed that the UE is scheduled to transmit a PUSCH with two TBs (CWs). However, even in a case where this assumption is not relied upon (for example, a case where one CW is scheduled by one DCI), each embodiment may be applicable. For example, for a PUSCH that transmits one CW, each embodiment may be applicable when the number of layers / SRS (PUSCH) ports / DMRS ports exceeding 4 is used. Similarly, for a PUSCH that transmits one CW, each embodiment may be applicable when the number of layers / SRS (PUSCH) ports / DMRS ports of 4 or less is used.

[0235] Note that at least one of the above embodiments may be applicable only to a UE that has reported a specific UE capability or supports the specific UE capability.

[0236] The specific UE capability may indicate at least one of the following: · Whether it supports two CWs for a PUSCH scheduled by one DCI (single DCI), · Whether it supports UCI multiplexed on two CWs for a PUSCH scheduled by one DCI, · Whether it supports UCI multiplexed on one of the two CWs for a PUSCH scheduled by one DCI, · Whether it supports two CWs mapped to 5 to 6 layers, · Whether it supports two CWs mapped to 5 to 8 layers, · Whether it supports two CWs mapped to 2 to 4 layers, · Whether it supports a PUSCH up to 6 layers, · Whether it supports a PUSCH up to 8 layers, · Whether it supports up to 6 SRS / PUSCH ports, · Whether it supports up to 8 SRS / PUSCH ports, · Whether to support up to 6 DMRS ports · Whether to support up to 8 DMRS ports · Whether to support a joint precoding matrix for two CWs (a precoding matrix such as that shown in FIG. 8, which is used for CW-to-layer mapping) · Whether to support separate precoding matrices for two CWs (two precoding matrices such as those shown in FIG. 9, which are used for CW-to-layer mapping)

[0237] Also, the above specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), or capabilities for each frequency (e.g., cell, band, BWP), or capabilities for each frequency range (e.g., FR1, FR2, FR3, FR4, FR5), or capabilities for each subcarrier spacing.

[0238] Also, the above specific UE capabilities may be capabilities that are applied across all duplex modes (commonly regardless of duplex mode), or capabilities for each duplex mode (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0239] Also, at least one of the above-described embodiments may be applied when the UE sets specific information related to the above-described embodiments by upper layer signaling (if not set, for example, the operation of Rel. 15 / 16 is applied). For example, the specific information may be information indicating enabling two CWs for PUSCH, information indicating enabling UCI multiplexing to two CWs, information indicating enabling UCI multiplexing to one of two CWs, information indicating using a new layer mapping table, any RRC parameter for a specific release (e.g., Rel. 18), etc.

[0240] In the present disclosure, using (referring to) a table may not necessarily mean holding the table itself, but may mean deriving / outputting / processing the content indicated in the table using functions, lists, conditions, etc.

[0241] (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 above-described wireless communication methods according to the respective embodiments of the present disclosure.

[0242] FIG. 11 is a diagram showing an example of the 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), the 5th generation mobile communication system New Radio (5G NR), or the like.

[0243] Further, the wireless communication system 1 may support dual connectivity (multi-RAT dual connectivity (MR-DC)) between a plurality of 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.

[0244] 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.

[0245] The wireless communication system 1 may support dual connectivity between a plurality of 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).

[0246] 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 figures. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0247] 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).

[0248] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macro cell C1 may be included in FR1, and 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. For example, FR1 may correspond to a frequency band higher than FR2.

[0249] Also, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0250] The plurality of base stations 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-level 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.

[0251] 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.

[0252] The user terminal 20 may be a terminal corresponding to at least one of communication systems such as LTE, LTE-A, 5G, etc.

[0253] 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.

[0254] The wireless access method may be referred to as 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 wireless access methods of the UL and the DL.

[0255] 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.

[0256] In the wireless communication system 1, as the uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc., which are shared by each user terminal 20, may be used.

[0257] User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH. User data, upper layer control information, etc. may be transmitted by PUSCH. Also, Master Information Block (MIB) may be transmitted by PBCH.

[0258] Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.

[0259] Note that the DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and the DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0260] For PDCCH detection, a control resource set (CORESET) and a search space may be used. The CORESET corresponds to the resources 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.

[0261] 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.

[0262] Uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (e.g., 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.

[0263] Note that in the present disclosure, the downlink, uplink, etc. may be expressed without adding "link". Also, "Physical" may not be added at the beginning of various channels.

[0264] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may be transmitted.

[0265] The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (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.

[0266] Also, in the wireless communication system 1, as the uplink reference signal (Uplink Reference Signal (UL-RS)), a sounding reference signal (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.

[0267] (Base station) FIG. 12 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.

[0268] Note that in this example, the functional blocks of the characteristic parts in this 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.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] The transmission / reception antenna 130 can be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0274] 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.

[0275] The transmission / reception unit 120 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), etc.

[0276] 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, for example, data and control information obtained from the control unit 110, and generate a bit sequence to be transmitted.

[0277] The transceiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0278] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 130.

[0279] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0280] 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.

[0281] 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)), reception 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.

[0282] The transmission path interface 140 may transmit and receive signals (backhaul signaling) to and from 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.

[0283] 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.

[0284] Note that the transmission / reception unit 120 may transmit information (e.g., upper layer parameters, setting information, etc. indicating a fixed number or maximum number of codewords (CWs) to be scheduled) indicating that a plurality of transport blocks (TBs) / codewords (CWs) for the Physical Uplink Shared Channel (PUSCH) are scheduled by one Downlink Control Information (DCI) to the user terminal 20.

[0285] When the physical uplink shared channel overlaps with a physical uplink control channel (PUCCH) for transmitting uplink control information (UCI), the transceiver unit 120 may receive from the user terminal 20 the physical uplink shared channel including at least one of the plurality of transport blocks in which the uplink control information is multiplexed.

[0286] Further, when the plurality of codewords include a signal mapped to the number of layers indicated by the precoding and the layer number field of the downlink control information, the transceiver unit 120 may receive from the user terminal 20 the physical uplink shared channel.

[0287] Further, the transceiver unit 120 may transmit to the user terminal 20 information regarding a sounding reference signal (SRS) resource indicator (SRI) for transmission of a physical uplink shared channel (PUSCH) (for example, an SRI field), and information regarding a transmitted precoding matrix indicator (TPMI) for transmission of the physical uplink shared channel (for example, a precoding and layer number field).

[0288] When at least one of the number of SRS resources specified using the SRI and the number of precoding matrices specified using the TPMI is 2 or more, the transceiver unit 120 may receive from the user terminal 20 the physical uplink shared channel including a signal mapped based on a determined mapping between the layer for transmission of the physical uplink shared channel and the port of the specified SRS resource.

[0289] (User Terminal) FIG. 13 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. Note that one or more of the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may be provided.

[0290] Note that in this example, the functional blocks of the characteristic portions in the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

[0291] The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on the common knowledge in the technical field related to the present disclosure.

[0292] 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.

[0293] 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 configured from 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.

[0294] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be configured from a transmission unit and a reception unit. The transmission unit may be configured from the transmission processing unit 2211 and the RF unit 222. The reception unit may be configured from the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0295] The transmission / reception antenna 230 can be composed of an antenna described based on the common recognition in the technical field related to the present disclosure, such as an array antenna or the like.

[0296] The transmission / reception unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 220 may transmit the above-described uplink channel, uplink reference signal, etc.

[0297] 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), etc.

[0298] 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, for example, data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0299] 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.

[0300] 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-described transmission processing to transmit the channel using the DFT-s-OFDM waveform, and if not, it may not perform DFT processing as the above-described transmission processing.

[0301] 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.

[0302] 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.

[0303] 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 acquire user data, etc.

[0304] 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.

[0305] 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.

[0306] The transmission / reception unit 220 may receive information (e.g., upper layer parameters, configuration information, etc. indicating a fixed number or maximum number of scheduled CWs) indicating that a plurality of codewords (CWs) including a first codeword and a second codeword for a physical uplink shared channel (PUSCH) are scheduled by one downlink control information (DCI).

[0307] The control unit 210 may control the transmission of the physical uplink shared channel for the plurality of codewords based on the information.

[0308] When the physical uplink shared channel overlaps with a physical uplink control channel (PUCCH) for transmitting uplink control information (UCI), the control unit 210 may perform control to multiplex the uplink control information on at least one of the plurality of transport blocks.

[0309] The control unit 210 may perform control to multiplex the entire uplink control information on both of the plurality of transport blocks.

[0310] The control unit 210 may divide the entire uplink control information into a first part and a second part, multiplex the first part on a first transport block among the plurality of transport blocks, and multiplex the second part on a second transport block among the plurality of transport blocks.

[0311] The control unit 210 may perform control to multiplex the entire uplink control information on only one of the plurality of transport blocks.

[0312] Also, the control unit 210 may perform control to map the plurality of codewords to layers corresponding to the number of layers indicated by the precoding and layer number field of the downlink control information.

[0313] The control unit 210 may determine that the number of layers indicated by the field is the total number of layers of the plurality of codewords, map the first codeword to a layer corresponding to the number of layers for the first codeword corresponding to the total number of layers, and map the second codeword to a layer corresponding to the number of layers for the second codeword corresponding to the total number of layers.

[0314] The control unit 210 may determine that the number of layers indicated by the field indicates the number of layers for the first codeword and the number of layers for the second codeword, map the first codeword to the layer with the number of layers for the first codeword, and map the second codeword to the layer with the number of layers for the second codeword.

[0315] Based on a mapping table (for example, the correspondence relationship of the above-mentioned new layer mapping) that only indicates mapping the plurality of codewords to a layer with 5 or more layers, the control unit 210 may map the plurality of codewords to the layer with the number of layers indicated by the field.

[0316] Further, when at least one of the number of SRS resources specified using a sounding reference signal (SRS) resource indicator (SRI) for transmission of a physical uplink shared channel and the number of precoding matrices specified using a transmitted precoding matrix indicator (TPMI) for transmission of the physical uplink shared channel is 2 or more, the control unit 210 may determine the mapping between the layer for transmission of the physical uplink shared channel and the ports of the specified SRS resources.

[0317] The transceiver unit 220 may transmit the physical uplink shared channel.

[0318] When the number of precoding matrices is 1 and the number of SRS resources is 2, the control unit 210 may apply the specified one precoding matrix for the mapping between all of the layers and all ports of the specified two SRS resources.

[0319] When the number of precoding matrices is 2 and the number of SRS resources is 2, the control unit 210 may apply the specified first precoding matrix for mapping between the first group of the layers and all ports of the specified first SRS resource, and apply the specified second precoding matrix for mapping between the second group of the layers and all ports of the specified second SRS resource.

[0320] When the number of precoding matrices is 2 and the number of SRS resources is 1, the control unit 210 may apply the specified first precoding matrix for mapping between the first group of the layers and the first group of ports of the specified SRS resource, and apply the specified second precoding matrix for mapping between the second group of the layers and the second group of ports of the specified second SRS resource.

[0321] (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 (e.g., 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.

[0322] Here, functions include, but are not limited to, judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, etc. For example, a functional block (component) that enables transmission may be referred to as a transmitting unit, a transmitter, etc. In any case, as described above, the implementation method is not particularly limited.

[0323] 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. 14 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.

[0324] In the present disclosure, terms such as device, circuit, device, section, unit, etc. can be read interchangeably with each other. The hardware configuration 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.

[0325] For example, although only one processor 1001 is shown, 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.

[0326] Each function in the base station 10 and the user terminal 20 is realized, for example, by causing a processor 1001 to read a predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communication via a communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003.

[0327] 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.

[0328] 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 for causing 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.

[0329] The memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store a program (program code), a software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0330] The storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (e.g., a compact disc (Compact Disc ROM (CD-ROM), etc.), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. The storage 1003 may be referred to as an auxiliary storage device.

[0331] 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 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).

[0332] 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).

[0333] 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.

[0334] 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), or a Field Programmable Gate Array (FPGA), and some or all of the functional blocks may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0335] (Modification example) In addition, terms described in this disclosure and terms necessary for understanding this disclosure 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 referred to as a pilot, a pilot signal, etc. depending on the applicable standard. Also, a Component Carrier (CC) may be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0336] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe. Further, a 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) independent of numerology.

[0337] 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 processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0338] 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.

[0339] 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. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0340] 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 this disclosure may be read interchangeably with each other.

[0341] 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, mini-slot, etc. instead of a sub-frame.

[0342] 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 at each user terminal) to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0343] 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.

[0344] 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.

[0345] A TTI having a time length of 1 ms may be referred to as 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 referred to as 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.

[0346] 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 the long TTI and not less than 1 ms.

[0347] 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 the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in the RB may be determined based on the numerology.

[0348] Also, the 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.

[0349] Note that one or more RBs may be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0350] 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.

[0351] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) 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.

[0352] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be set within one carrier.

[0353] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that in the present disclosure, "cell", "carrier", etc. may be read as "BWP".

[0354] Note that the structures such as the above-described radio frame, sub-frame, slot, mini-slot, and symbol are merely examples. For example, the number of sub-frames included in a radio frame, the number of slots per sub-frame 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 changed in various ways.

[0355] Also, the information, parameters, etc. described in the present disclosure may be represented using absolute values, relative values from a predetermined value, or corresponding other information. For example, a radio resource may be indicated by a predetermined index.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] 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.

[0360] The notification of information is not limited to the modes / embodiments described in this disclosure, and other methods may be used. For example, the notification of information in this disclosure may be implemented 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.

[0361] 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. Also, the MAC signaling may be notified, for example, using a MAC Control Element (CE).

[0362] 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).

[0363] The determination may be made based on a value represented by 1 bit (either 0 or 1), a boolean value represented by true or false, or a numerical comparison (e.g., comparison with a predetermined value).

[0364] 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.

[0365] 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.

[0366] 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.

[0367] 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", and "panel" can be used interchangeably.

[0368] 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", and "component carrier" can be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, and pico cell.

[0369] A base station can accommodate one or more (e.g., three) cells. When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple 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 part or all of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0370] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0371] 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.

[0372] 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 also 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, an autonomous 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.

[0373] Also, 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 to be functions of the user terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to communication between terminals (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be replaced with a sidelink channel.

[0374] 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 to be functions of the base station 10.

[0375] 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 clear 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, Mobility Management Entity (MME), Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

[0376] 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 rearranged as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0377] Each aspect / embodiment described in the present disclosure may be applied to systems using Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 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.

[0378] 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".

[0379] 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, a 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 form.

[0380] 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, searching, inquiring" (e.g., searching in a table, database, or another data structure), "ascertaining", etc.

[0381] 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.

[0382] Also, "determining" may be considered to be "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "determining" may be considered to be making any operation.

[0383] Also, the term "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

[0384] 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".

[0385] In this disclosure, when two elements are connected, it can be considered that they are "connected" or "coupled" to each other using one or more electric wires, cables, printed electrical connections, etc., and, as 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.

[0386] 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" and "coupled" may also be interpreted in the same way as "different".

[0387] 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.

[0388] 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.

[0389] 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 illustrative explanation and does not bring any restrictive meaning to the invention according to the present disclosure.

Claims

1. A receiving unit that receives information indicating that a plurality of codewords including a first codeword and a second codeword for a physical uplink shared channel are scheduled by one downlink control information; A control unit that maps the plurality of codewords to layers corresponding to the number of layers indicated by the precoding and layer number field of the downlink control information, and The control unit determines a mapping between the layer and a port of an SRS resource specified using a sounding reference signal (SRS) resource indicator (SRI) of the downlink control information. A terminal.

2. The terminal according to claim 1, wherein the SRS resource supports up to 8 antenna ports, and the precoding matrix for the physical uplink shared channel supports up to 8 antenna ports and up to 8 layers.

3. The terminal according to claim 1, wherein the control unit uses a correspondence relationship of layer mapping for a physical downlink shared channel for the layer mapping of the plurality of codewords.

4. Receiving information indicating that a plurality of codewords including a first codeword and a second codeword for a physical uplink shared channel are scheduled by one downlink control information; Mapping the plurality of codewords to layers corresponding to the number of layers indicated by the precoding and layer number field of the downlink control information; and Determining a mapping between the layer and a port of an SRS resource specified using a sounding reference signal (SRS) resource indicator (SRI) of the downlink control information. A wireless communication method for a terminal having the steps.

5. A transmitting unit that transmits information indicating that a plurality of codewords including a first codeword and a second codeword for a physical uplink shared channel are scheduled by one downlink control information; A receiving unit that receives the physical uplink shared channel including the plurality of codewords mapped to the layer corresponding to the number of layers indicated by the precoding and the layer number field of the downlink control information. The receiving unit of the base station receives the physical uplink shared channel including the plurality of codewords mapped based on a determined mapping between the layer and the port of the SRS resource specified using the sounding reference signal (SRS) resource indicator (SRI) of the downlink control information. **Claim 6** A system having a terminal and a base station. The terminal includes a receiving unit that receives information indicating that a plurality of codewords including a first codeword and a second codeword for a physical uplink shared channel are scheduled by one piece of downlink control information. A control unit that maps the plurality of codewords to the layer corresponding to the number of layers indicated by the precoding and the layer number field of the downlink control information. The control unit determines a mapping between the layer and the port of the SRS resource specified using the sounding reference signal (SRS) resource indicator (SRI) of the downlink control information. The base station includes a transmitting unit that transmits the information. A system having a receiving unit that receives the physical uplink shared channel including the plurality of codewords.

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