Terminal, wireless communication method, base station and system

Abstract

A terminal according to one aspect of the present disclosure is subject to application of dynamic switching between a first scheme using multi-panel simultaneous transmission space division multiplexing (SDM) for a non-codebook based physical downlink shared channel (PUSCH) and a second scheme having transmission in the PUSCH relating to one panel, and is characterized by including: a reception unit that receives an instruction indicating the second scheme; and a control unit that applies a first sounding reference signal (SRS) resource indicator (SRI) field in downlink control information (DCI). According to one aspect of the present disclosure, at least one of an SRI field or a TPMI field can appropriately be applied.

Description

Terminal, wireless communication method and base station

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

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

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

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

[0005] In future wireless communication systems (e.g., NR), a terminal (user terminal, User Equipment (UE)) can use one of multiple panels (multiple beams) for uplink (UL) transmission. However, control when simultaneous transmission using multiple panels is supported has not been fully considered.

[0006] For example, when dynamic switching is applied between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for a codebook-based or non-codebook-based physical downlink shared channel (PUSCH) and a second scheme in which PUSCH transmission is associated with one panel, the application of the sounding reference signal (SRS) resource indicator (SRI) field and / or the transmit precoding matrix index (TPMI) field has not been fully addressed, which, if not clarified, could result in degradation of system performance, such as reduced throughput.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately apply at least one of the SRI field and the TPMI field.

[0008] A terminal according to one aspect of the present disclosure applies dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for a non-codebook-based physical downlink shared channel (PUSCH) and a second scheme in which transmission of the PUSCH is associated with one panel, and includes a receiving unit that receives an indication of the second scheme, and a control unit that applies a first sounding reference signal (SRS) resource indicator (SRI) field in downlink control information (DCI).

[0009] According to one aspect of the present disclosure, at least one of the SRI field and the TPMI field can be appropriately applied.

[0010] Figure 1 shows an example of the association between precoder types and TPMI indexes. Figures 2A to 2C show an example of multiple-panel transmission. Figures 3A to 3C show another example of multiple-panel transmission. Figure 4 shows the application of the SRS resource set indication field in Rel. 17. Figure 5 shows an example of the SRS resource set indication field applied to dynamic switching between single-panel transmission (STRP) and STxMP SDM. Figures 6A and 6B show examples of the sizes of the first and second SRI fields in Option 1 of the first embodiment. Figures 7A to 7C show examples of the sizes of the first and second TPMI fields in Option 1 of the second embodiment. Figures 8A to 8C show examples of the sizes of the first and second TPMI fields in Option 2 of the second embodiment. 9A to 9C are diagrams showing examples of the sizes of the first SRI field and the second SRI field in option 1 of the third embodiment. FIGS. 10A to 10C are diagrams showing examples of the sizes of the first SRI field and the second SRI field in option 2 of the third embodiment. FIG. 11 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 12 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 13 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 14 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 15 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (PUSCH Precoder) In NR, it is being considered that a UE will support at least one of codebook (CB)-based transmission and non-codebook (NCB)-based transmission.

[0012] For example, it is being considered that the UE determines a precoder (precoding matrix) for CB-based and / or NCB-based Physical Uplink Shared Channel (PUSCH) transmission using at least a Sounding Reference Signal (SRS) resource indicator (SRI).

[0013] In the case of CB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), a Transmitted Precoding Matrix Indicator (TPMI), etc. In the case of NCB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI.

[0014] The 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. The TRI and TPMI may be specified by the "Precoding information and number of layers" field of the DCI.

[0015] The UE may report UE capability information related to a precoder type, and the base station may configure the precoder type based on the UE capability information through higher 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").

[0016] The UE may determine the precoder to be used for PUSCH transmission based on precoder type information (which may be represented by the RRC parameter "codebookSubset") included in PUSCH configuration information ("PUSCH-Config" information element of RRC signaling) notified by higher layer signaling. The UE may be configured with a subset of the PMI specified by the TPMI by the codebookSubset.

[0017] 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 these (for example, it may be expressed by parameters such as "fully and partial and non-coherent" or "partial and non-coherent").

[0018] Fully coherent may mean that all antenna ports used for transmission are synchronized (may be expressed as being able to match the phase, using the same precoder, etc.). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those some ports cannot be synchronized with other ports. Non-coherent may mean that each antenna port used for transmission cannot be synchronized.

[0019] Note that a UE that supports a fully coherent precoder type may be assumed to support partially coherent and non-coherent precoder types, and a UE that supports a partially coherent precoder type may be assumed to support a non-coherent precoder type.

[0020] The precoder type may be interpreted as coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, or the like.

[0021] The UE may determine, from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmission, a precoding matrix corresponding to a TPMI index obtained from a DCI (e.g., DCI format 0_1, etc.) that schedules an UL transmission.

[0022] Fig. 1 is a diagram showing an example of association between precoder types and TPMI indexes. Fig. 1 corresponds to a table of precoding matrices W for single-layer (rank 1) transmission using four antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, transform precoding is effective).

[0023] In Fig. 1, when the precoder type (codebookSubset) is fully, partial, and noncoherent (fullyAndPartialAndNonCoherent), the UE is notified of a TPMI of any one of 0 to 27 for single layer transmission. Also, when the precoder type is partial and noncoherent (partialAndNonCoherent), the UE is configured with a TPMI of any one of 0 to 11 for single layer transmission. When the precoder type is noncoherent, the UE is configured with a TPMI of any one of 0 to 3 for single layer transmission.

[0024] As shown in Fig. 1, a precoding matrix in which only one element in each column is non-zero may be called a non-coherent codebook. A precoding matrix in which a predetermined number (not all) of elements in each column are non-zero may be called a partially coherent codebook. A precoding matrix in which all elements in each column are non-zero may be called a fully coherent codebook.

[0025] The non-coherent codebook and the partially coherent codebook may be referred to as an antenna selection precoder, and the fully coherent codebook may be referred to as a non-antenna selection precoder.

[0026] In the present disclosure, a partially coherent codebook may correspond to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission by a UE configured with a partially coherent codebook subset (e.g., RRC parameter “codebookSubset”=“partialAndNonCoherent”), excluding a codebook corresponding to a TPMI specified by DCI for a UE configured with a non-coherent codebook subset (e.g., RRC parameter “codebookSubset”=“nonCoherent”) (i.e., in the case of single-layer transmission with four antenna ports, a codebook with TPMI=4 to 11).

[0027] In the present disclosure, a fully coherent codebook may correspond to a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission by a UE configured with a fully coherent codebook subset (e.g., RRC parameter “codebookSubset”=“fullyAndPartialAndNonCoherent”), excluding a codebook corresponding to a TPMI specified by DCI for a UE configured with a partially coherent codebook subset (e.g., RRC parameter “codebookSubset”=“partialAndNonCoherent”) (i.e., in the case of single-layer transmission with four antenna ports, a codebook with TPMI=12 to 27).

[0028] (Spatial Relationship for SRS, PUSCH) The UE may receive information (SRS configuration information, e.g., parameters in the RRC control element "SRS-Config") used for transmitting measurement reference signals (e.g., Sounding Reference Signals (SRS)).

[0029] Specifically, the UE may receive at least one of information regarding one or more SRS resource sets (SRS resource set information, e.g., the RRC control element "SRS-ResourceSet") and information regarding one or more SRS resources (SRS resource information, e.g., the RRC control element "SRS-Resource").

[0030] An SRS resource set may be associated with (or group together) a predetermined number of SRS resources, each of which may be identified by an SRS Resource Indicator (SRI) or SRS Resource Identifier (ID).

[0031] 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 SRS usage.

[0032] 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 the DCI.

[0033] Furthermore, the usage ("usage" of the RRC parameter, "SRS-SetUse" of the L1 (Layer-1) parameter) may be, for example, beam management, codebook-based transmission (codebook: CB), non-codebook-based transmission (non-Codebook: NCB), antenna switching, etc. The SRS for the codebook-based transmission or non-codebook-based transmission may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on the SRI.

[0034] For example, the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and a Transmitted Precoding Matrix Indicator (TPMI) in the case of codebook-based transmission. The UE may determine a precoder for PUSCH transmission based on the SRI in the case of non-codebook-based transmission.

[0035] The SRS resource information may include an SRS resource ID (SRS-ResourceId), the number of SRS ports, the SRS port number, a transmission comb, an SRS resource mapping (e.g., time and / or frequency resource position, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, an SRS resource type, a sequence ID, spatial relationship information of the SRS, etc.

[0036] The spatial relationship information of the SRS (e.g., the RRC information element "spatialRelationInfo") may indicate spatial relationship 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).

[0037] The spatial relationship information of the SRS may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the predetermined reference signal.

[0038] In the present disclosure, the SSB index, SSB resource ID, and SSBRI (SSB Resource Indicator) may be interchangeable. Also, the CSI-RS index, CSI-RS resource ID, and CRI (CSI-RS Resource Indicator) may be interchangeable. Also, the SRS index, SRS resource ID, and SRI may be interchangeable.

[0039] The spatial relationship information of the SRS may include a serving cell index, a BWP index (BWP ID), etc. corresponding to the predetermined reference signal.

[0040] In NR, the transmission of uplink signals may be controlled based on the presence or absence of beam correspondence (BC). BC may be, for example, the ability of a node (e.g., a base station or a UE) to determine the beam to be used for transmitting a signal (transmit beam, Tx beam) based on the beam to be used for receiving the signal (receive beam, Rx beam).

[0041] BC may also be referred to as transmit / receive beam correspondence (Tx / Rx beam correspondence), beam reciprocity, beam calibration, calibrated / non-calibrated, reciprocity calibrated / non-calibrated, correspondence, agreement, etc.

[0042] For example, in the absence of BC, the UE may transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, etc.) using the same beam (spatial domain transmit filter) as the SRS (or SRS resource) instructed by the base station based on the measurement results of one or more SRSs (or SRS resources).

[0043] On the other hand, when BC is present, the UE may transmit an uplink signal (e.g., a PUSCH, a PUCCH, an SRS, etc.) using a beam (spatial domain transmit filter) that is the same as or corresponds to the beam (spatial domain receive filter) used to receive a specified SSB or CSI-RS (or CSI-RS resource).

[0044] When the UE is configured with spatial relationship information regarding the SRS and an SSB or CSI-RS for a certain SRS resource (e.g., with BC), the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter for receiving the SSB or CSI-RS (spatial domain receive filter). In this case, the UE may assume that the UE receive beam for the SSB or CSI-RS and the UE transmit beam for the SRS are the same.

[0045] When the UE is configured with spatial relationship information between another SRS (reference SRS) and the target SRS for a certain SRS (target SRS) resource (e.g., without BC), the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter for transmitting the reference SRS. That is, in this case, the UE may assume that the UE transmit beam for the reference SRS and the UE transmit beam for the target SRS are the same.

[0046] The UE may determine the spatial relationship of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a predetermined field (e.g., an SRS resource identifier (SRI) field) in the DCI. Specifically, the UE may use spatial relationship information of the SRS resources (e.g., the RRC information element "spatialRelationInfo") determined based on the value of the predetermined field (e.g., the SRI) for PUSCH transmission.

[0047] When codebook-based transmission is used for PUSCH, two SRS resources may be configured for the UE by RRC, and one of the two SRS resources may be indicated by a DCI (a 1-bit predetermined field). When non-codebook-based transmission is used for PUSCH, four SRS resources may be configured for the UE by RRC, and one of the four SRS resources may be indicated by a DCI (a 2-bit predetermined field). To use a spatial relationship other than the two or four spatial relationships configured by RRC, an RRC reconfiguration is required.

[0048] In addition, the DL-RS can be configured for the spatial relationship of the SRS resources used for the PUSCH. For example, for SP-SRS, the UE can be configured by RRC with the spatial relationship of multiple (e.g., up to 16) SRS resources, and one of the multiple SRS resources can be indicated by MAC CE.

[0049] (Multiple Panel Transmission) In Rel. 15 and Rel. 16 UEs, only one beam and panel are used for UL transmission at a time (Fig. 2A). In Rel. 17, simultaneous UL transmission of multiple beams and panels for one or more TRPs is being considered to improve UL throughput and reliability.

[0050] For simultaneous UL transmission using multiple beams and multiple panels, reception by one TRP with multiple panels (Fig. 2B) or reception by two TRPs with an ideal backhaul (Fig. 2C) is considered. A single PDCCH is considered for scheduling multiple PUSCHs (e.g., simultaneous transmission of PUSCH #1 and PUSCH #2). Panel-specific transmission is considered to be supported, and a panel ID is introduced.

[0051] The base station may use the UL TCI or panel ID to configure or indicate panel-specific transmissions for UL transmissions. 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 transmissions of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If the panel ID is explicitly signaled, the panel ID may be configured in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).

[0052] <Multi-panel UL transmission method> The multi-panel UL transmission method or candidate multi-panel UL transmission method 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. Multiple methods including at least one of methods 1 to 3 may be supported, and one of the multiple methods may be configured in the UE.

[0053] <<Method 1>> Method 1 is coherent multi-panel UL transmission.

[0054] Multiple panels may be synchronized with each other. All layers are mapped to all panels. Multiple analog beams are directed. The SRS Resource Indicator (SRI) field may be extended. This scheme may use up to 4 layers for the UL.

[0055] In the example of Figure 3A, the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH (1, 2, ..., L)) and transmits the L layers from each of two panels. Panels #1 and #2 are coherent. Scheme 1 can obtain diversity gain. The total number of layers in the two panels is 2L. If the maximum total number of layers is 4, the maximum number of layers in one panel is 2.

[0056] <<Scheme 2>> Scheme 2 is a non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB).

[0057] Multiple panels may not be synchronized. Different layers are mapped to different panels and one CW or TB for PUSCHs from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels. This scheme may use up to four layers or up to eight layers for the UL. If up to eight layers are supported, this scheme may support one CW or TB using up to eight layers.

[0058] In the example of FIG. 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 k layers from panel #1, and transmits L-k layers from panel #2. Scheme 2 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0059] <<Scheme 3>> Scheme 3 is two CW or TB non-coherent multi-panel UL transmissions.

[0060] Multiple panels may not be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCH from multiple panels. A layer corresponding to one CW or TB may be mapped to one panel. Layers corresponding to multiple CWs or TBs may be mapped to different panels. This scheme may use up to four layers or up to eight layers for the UL. When up to eight layers are supported, this scheme may support up to four layers per CW or TB.

[0061] In the example of FIG. 3C, the UE maps CW#1 or TB#1 of the 2CWs or 2TBs to k layers (PUSCH(1, 2, ..., k)), maps CW#2 or TB#2 to L-k layers (PUSCH(k+1, k+2, ..., L)), and transmits k layers from panel#1 and L-k layers from panel#2. Scheme 3 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0062] (Considerations for Rel. 18) For MIMO in Rel. 18, support for 8Tx and simultaneous transmission across multiple panels (STxMP) are being considered. For example, extensions to UL DMRS, SRS, SRI, and TPMI (including codebooks) are being considered to enable 8Tx UL operation supporting four or more layers per UE. Furthermore, for customer premises equipment (CPE), fixed wireless access (FWA), automotive, and industrial equipment (if applicable), studies are being conducted to facilitate simultaneous transmission across multiple panels to improve UL throughput and reliability, focusing on FR2 and multi-TRP, assuming up to two TRPs and up to two panels.

[0063] A Space Division Multiplexing (SDM) method for single DCI multi-panel simultaneous transmission PUSCH is being considered. In the SDM method, the UE separately precodes different layers / DMRS ports of one PUSCH and transmits simultaneously from two different UE panels using one codeword (CW). Alternatively, it is being considered whether the SDM method supports two CWs and transmits simultaneously from two different panels.

[0064] Support for two SRS resource sets (CB or NCB), two TPMI fields for two SRS resource sets (two panels / two TRPs), and two SRI fields for two SRS resource sets (two panels / two TRPs) are under consideration. It has also been agreed that dynamic switching between STxMP SDM and STRP transmission will be supported. STRP transmission means that PUSCH transmission is associated with one panel / TRP / SRS resource set.

[0065] (TDM MTRP PUSCH in Rel. 17) In Rel. 17, different PUSCH repetitions are associated with different beam / TRP / SRS resource sets. In the TDM MTRP PUSCH in Rel. 17, the SRS resource set indication field indicates dynamic switching between MTRP and STRP transmission (see Figure 4). When codepoint "00" (index = 0) or codepoint "01" (index = 1) is indicated, STRP is used, the first SRI and first TPMI fields are applied, and the second SRI and second TPMI fields are reserved. When codepoint "10" (index = 2) or codepoint "11" (index = 3) is indicated, MTRP is used, and the first and second SRI and first and second TPMI fields are applied.

[0066] (Analysis) As described above, in future wireless communication systems (e.g., NR), a terminal can use one of multiple panels (multiple beams) for UL transmission. However, control when simultaneous transmission using multiple panels is supported has not been fully considered. For example, when dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for codebook-based or non-codebook-based PUSCH and a second scheme in which PUSCH transmission is associated with one panel is applied, the application method of at least one of the SRI field and the TPMI field has not been fully considered. If this is not clarified, system performance, such as reduced throughput, may be degraded.

[0067] For example, when dynamic switching between STXMP SDM and STRP transmission is considered and STRP transmission is indicated, it is unclear which SRI field and which TPMI field are used in codebook (CB)-based PUSCH transmission. Also, it is unclear which SRI field is used in non-codebook (NCB)-based PUSCH transmission. For the CB SRI field, the size of the SRI field depends on the number of SRS resources in the SRS resource set. For the NCB SRI field, the size of the SRI field depends on the number of SRS resources in the SRS resource set and the maximum rank. For the CB TPMI field, the size of the TPMI field depends on the number of antenna ports, the maximum rank, and full power mode. Therefore, it is preferable to consider the sizes of the SRI field and TPMI field taking into account that the maximum ranks of the first panel of STxMP SDM, the second panel of STxMP SDM, the first panel of sTRP, and the second panel of sTRP are different, and that the number of SRS resources of the first panel and the second panel are different.

[0068] Therefore, the present inventors have conceived a terminal that appropriately applies at least one of the SRI field and the TPMI field.

[0069] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0070] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0071] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0072] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0073] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0074] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0075] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0076] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0077] In the present disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0078] In the present disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0079] In the present disclosure, STxMP, multi-panel simultaneous transmission, multi-panel simultaneous UL transmission, and multi-panel simultaneous (UL) transmission using multi-DCI may be interchangeable. Multi-panel simultaneous transmission may mean performing multiple UL transmissions simultaneously from multiple panels. "Simultaneous" may mean that at least a portion of the multiple UL transmissions overlap in time. In the present disclosure, supporting and configuring / instructing may be interchangeable. In the present disclosure, transmission power and output power may be interchangeable. In the present disclosure, determination by the UE and configuration / instruction by the network (base station / gNB) may be interchangeable.

[0080] In the present disclosure, the terms panel, panel ID, TRP, UE capability value index, TCI state, SRI, SRS resource set, SRS resource set ID, CORESET pool index, layer group, antenna port group, beam, and TCI state may be interchangeable. In the present disclosure, the overlap of two PUSCHs (PUSCH transmissions) may mean that at least a portion of the two PUSCHs (PUSCH transmissions) overlap in time.

[0081] Configuring simultaneous multi-panel transmission may mean that multiple DCIs associated with different CoresetPoolIndexes schedule different PUSCHs. Multiple PUSCHs associated with different CoresetPoolIndexes / panels and multiple PUSCHs scheduled by multiple DCIs associated with different CoresetPoolIndexes / panels may be interpreted as interchangeable. Receiving configuration of simultaneous multi-panel transmission using multiple DCIs and configuring simultaneous multi-panel transmission may be interpreted as interchangeable.

[0082] (Wireless Communication Method) In this disclosure, panel / TRP may refer to an SRS resource set, layer group, antenna port group, UE capability value set, beam, and TCI state. In this disclosure, the first / second SRS resource set may correspond to an SRS resource set with a lower / higher ID. STRP transmission means that a PUSCH transmission is associated with one panel / TRP / SRS resource set. STxMP SDM (STxMP SDM method) means that different layers of a PUSCH are associated with different panels / TRP / SRS resource sets.

[0083] The STxMP SDM associated with the first panel is labeled STxMP_P1. The STxMP SDM associated with the second panel is labeled STxMP_P2. The STRP associated with the first panel is labeled SP_P1. The STRP associated with the second panel is labeled SP_P2.

[0084] <Dynamic Switching Between STxMP SDM Scheme and STRP Transmission> When dynamically switching between STxMP SDM scheme and STRP transmission, if STxMP SDM is dynamically indicated, at least one of the following (1) and (2) is assumed: (1) For CB / NCB PUSCH, the first SRI field is associated with the first panel / TRP / SRS resource set, and the second SRI field is associated with the second panel / TRP / SRS resource set; (2) For CB PUSCH, the first TPMI field is associated with the first panel / TRP / SRS resource set, and the second TPMI field is associated with the second panel / TRP / SRS resource set.

[0085] A specific field of the DCI may be used to indicate dynamic switching between STRP and STxMP. For example, at least one of the following (1) and (2) may be applied:

[0086] (1) Dynamic switching may be indicated to the UE using an SRS resource set indication field, which may be similar to the SRS resource set indication field in the TDM MTRP PUSCH of Rel. 17 shown in Figure 4. Also, any of the following examples 1 to 4 may be applied.

[0087] In the following examples, STxMP (first SRS resource set, second SRS resource set in order) means that the first X layers are associated with the first SRS resource set and the remaining layers are associated with the second SRS resource set. STxMP (second SRS resource set, first SRS resource set in order) means that the first X layers are associated with the second SRS resource set and the remaining layers are associated with the first SRS resource set.

[0088] (Example 1) When the SRS resource set indication field is 0, it indicates STRP (first SRS resource set only). When the SRS resource set indication field is 1, it indicates STRP (second SRS resource set only). When the SRS resource set indication field is 2, it indicates STxMP (first SRS resource set, second SRS resource set in this order). When the SRS resource set indication field is 3, it indicates STxMP (second SRS resource set, first SRS resource set in this order).

[0089] (Example 2) If the SRS resource set indication field is 0, it indicates STRP (first SRS resource set only). If the SRS resource set indication field is 1, it indicates STRP (second SRS resource set only). If the SRS resource set indication field is 2, it indicates STxMP (first SRS resource set, second SRS resource set in that order). If the SRS resource set indication field is 3, it is reserved (unused).

[0090] (Example 3) If the SRS resource set indication field is 0, it indicates STRP (first SRS resource set only). If the SRS resource set indication field is 1, it indicates STRP (second SRS resource set only). If the SRS resource set indication field is 2, it indicates STxMP (second SRS resource set, first SRS resource set order). If the SRS resource set indication field is 3, it is reserved (unused).

[0091] (Example 4) Whether the SRS resource set indication field=2 indicates STxMP (first SRS resource set, second SRS resource set order) or STxMP (second SRS resource set, first SRS resource set order) may be configured / indicated by the RRC / MAC CE.

[0092] (2) When a joint TCI state / UL TCI state is set, STRP or STxMP may be indicated depending on the number of indicated joint TCI states / UL TCI states. For example, when two joint TCI states / UL TCI states are indicated, STxMP is indicated, and when one joint TCI state / UL TCI state is indicated, STRP is indicated.

[0093] 5 is a diagram showing an example of an SRS resource set indication field applied to dynamic switching between the single panel transmission method (STRP) and the STxMP SDM method. The example of FIG. 5 corresponds to the above examples 1 and 2. When dynamic switching between the STRP and STxMP SDM methods is configured, the example of FIG. 5 is applied to the SRS resource set indication field, and when the dynamic switching is not configured, the example of FIG. 4 (existing method) may be applied.

[0094] <First embodiment> For a codebook (CB)-based PUSCH, when dynamic switching between a multi-panel simultaneous transmission SDM scheme (first scheme) and STRP transmission (a scheme in which PUSCH transmission is associated with one panel / TRP / SRS resource set (second scheme)) is applied (when a configuration for the switching is received) and STRP transmission (second scheme) is dynamically indicated (when an indication indicating STRP (second scheme) is received), at least one of the following options may be applied:

[0095] [Option 1] The UE may apply the first SRI field when an STRP transmission associated with the first / second panel / TRP / SRS resource set is indicated.

[0096] <<Size of the First SRI Field>> The size of the first SRI field may be dynamically changed between size #P1 and size #P2 depending on the transmission method applied. When simultaneous multi-panel transmission is specified, the size of the first SRI field is size #P1 (FIG. 6A). When SP_P1 is specified, the size of the first SRI field is size #P1 (FIG. 6A). When SP_P2 is specified, the size of the first SRI field is size #P2 (FIG. 6B).

[0097] As another example, the size of the first SRI field may be the maximum value of size #P1 and size #P2.

[0098] The size #P1 and the size #P2 may be set by higher layer signaling, or may be set based on the number of SRS resources for each SRS resource set.

[0099] <<Size of the Second SRI Field>> When the size of the first SRI field changes dynamically, the size of the second SRI field changes dynamically between size #P2 and size #X. When simultaneous multi-panel transmission / SP_P1 / SP_P2 is instructed, the size of each SRI field is changed so that the sum of the size of the first SRI field and the size of the second SRI field does not change.

[0100] When simultaneous multi-panel transmission is specified, the size of the second SRI field is size #P2 (FIG. 6A). When SP_P1 is specified, the size of the second SRI field is size #P2 (FIG. 6A). When SP_P2 is specified, the size of the second SRI field is size #X (FIG. 6B). Note that size #P1 + size #P2 = size #P2 + size #X.

[0101] If the size of the first SRI field is the maximum value of size #P1 and size #P2, the size of the second SRI field will be size #P2.

[0102] Size #P1 is the size of the SRI field determined assuming the number of SRS resources associated with the first panel / first TRP / first SRS resource set, and size #P2 is the size of the SRI field determined assuming the number of SRS resources associated with the second panel / second TRP / second SRS resource set.

[0103] [Option 2] If STRP transmission (second method) related to the first or second panel / TRP / SRS resource set is indicated, the first SRI field and the second SRI field are applied, respectively.

[0104] If an STRP transmission associated with a first panel / TRP / SRS resource set is indicated, the UE applies the first SRI field, and if an STRP transmission associated with a second panel / TRP / SRS resource set is indicated, the UE applies the second SRI field.

[0105] The size of the first SRI field is determined based on the number of SRS resources associated with the first panel / TRP / SRS resource set, and the size of the second SRI field is determined based on the number of SRS resources associated with the second panel / TRP / SRS resource set.

[0106] [Option 3] If STRP transmission (Scheme 2) related to the first or second panel / TRP / SRS resource set is indicated, a larger size of the SRI field may be applied.

[0107] The size of the first SRI field is determined based on the number of SRS resources associated with the first panel / TRP / SRS resource set, and the size of the second SRI field is determined based on the number of SRS resources associated with the second panel / TRP / SRS resource set.

[0108] If the size of the first SRI field is greater than the size of the second SRI field and an STRP transmission associated with the first or second panel / TRP / SRS resource set is indicated, the UE may apply the first SRI field.

[0109] If the size of the second SRI field is greater than the size of the first SRI field and an STRP transmission associated with the first or second panel / TRP / SRS resource set is indicated, the UE may apply the second SRI field.

[0110] If the size of the first SRI field is the same as the size of the second SRI field and an STRP transmission associated with the first or second panel / TRP / SRS resource set is indicated, the UE may apply the first SRI field.

[0111] For example, the UE may expect (assume) that the size of the first SRI field is larger than the size of the second SRI field.

[0112] [Option 4] When STRP transmission (second method) related to the first / second panel / TRP / SRS resource set is indicated, the UE may interpret the first / second SRI fields as a single combined field. For example, any of the following examples (1) to (6) may be applied.

[0113] (1) The first SRI field is the Most Significant Bit (MSB) and the second SRI field is the Least Significant Bit (LSB). (2) The second SRI field is the MSB and the first SRI field is the LSB. (3) The first / last X bits of the first SRI field are the MSB and the second SRI field are the LSB. (4) The first SRI field is the MSB and the first / last X bits of the second SRI field are the LSB. (5) The first / last X bits of the second SRI field are the MSB and the first SRI field is the LSB. (6) The second SRI field is the MSB and the first / last X bits of the first SRI field are the LSB.

[0114] If a STRP transmission associated with a first panel / TRP / SRS resource set is indicated, the combined field for the first panel may be used. If a STRP transmission associated with a second panel / TRP / SRS resource set is indicated, the combined field for the second panel may be used.

[0115] The size of the first SRI field is determined based on the number of SRS resources associated with the first panel / TRP / SRS resource set, and the size of the second SRI field is determined based on the number of SRS resources associated with the second panel / TRP / SRS resource set.

[0116] [Variations] There may be a restriction on the number of SRS resources associated with the first SRS resource set and the second SRS resource set. For example, the UE may expect the number of SRS resources associated with the first SRS resource set / panel / TRP to be greater than or equal to the number of SRS resources associated with the second SRS resource set / panel / TRP. Alternatively, the UE may expect the number of SRS resources associated with the first SRS resource set / panel / TRP to be the same as the number of SRS resources associated with the second SRS resource set / panel / TRP.

[0117] According to the first embodiment, for CB-based PUSCH, if STRP transmission is dynamically indicated, the first / second SRI fields can be used appropriately.

[0118] <Second embodiment> For a codebook (CB)-based PUSCH, when dynamic switching between a multi-panel simultaneous transmission SDM scheme (first scheme) and STRP transmission (second scheme in which PUSCH transmission is associated with one panel / TRP / SRS resource set) is applied (when a configuration for the switching is received) and STRP transmission (second scheme) is dynamically indicated (when an indication indicating STRP (second scheme) is received), at least one of the following options may be applied:

[0119] [Option 1] The UE may apply the first TPMI field when STRP transmission (second scheme) associated with the first / second panel / TRP / SRS resource set is indicated.

[0120] <<Size of the First TPMI Field>> The size of the first TPMI field may be dynamically changed among size #STxMP_P1, size #SP_P1, and size #SP_P2 depending on the transmission method applied. When simultaneous multi-panel transmission is indicated, the size of the first TPMI field is size #STxMP_P1 (FIG. 7A). When SP_P1 is indicated, the size of the first TPMI field is size #SP_P1 (FIG. 7B). When SP_P2 is indicated, the size of the first TPMI field is size #SP_P2 (FIG. 7C).

[0121] As another example, the size of the first TPMI field may be the maximum value among size #STxMP_P1, size #SP_P1, and size #SP_P2.

[0122] The sizes #STxMP_P1, #SP_P1, and #SP_P2 may be configured by higher layer signaling, or may be configured based on the number of SRS resources for each SRS resource set.

[0123] <<Size of the Second TPMI Field>> When the size of the first TPMI field changes dynamically, the size of the second TPMI field changes dynamically between size #STxMP_P2, size #X, and size #Y. When simultaneous multi-panel transmission / SP_P1 / SP_P2 is instructed, the size of each TPMI field is changed so that the sum of the size of the first TPMI field and the size of the second TPMI field does not change.

[0124] When simultaneous multi-panel transmission is specified, the size of the second TPMI field is size #STxMP_P2 (FIG. 7A). When SP_P1 is specified, the size of the second TPMI field is size #X (FIG. 7B). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P1 + size #X. When SP_P2 is specified, the size of the second TPMI field is size #Y (FIG. 7C). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P2 + size #Y.

[0125] If the size of the first TPMI field is the maximum value among size #STxMP_P1, size #SP_P1, and size #SP_P2, the size of the second TPMI field will be size #STxMP_P2.

[0126] Size #STxMP_P1 is the size of the TPMI field determined assuming the number of antenna ports / maximum rank / full power modes associated with STxMP_P1. Size #STxMP_P2 is the size of the TPMI field determined assuming the number of antenna ports / maximum rank / full power modes associated with STxMP_P2. Size #SP_P1 is the size of the TPMI field determined assuming the number of antenna ports / maximum rank / full power modes associated with SP_P1. Size #SP_P2 is the size of the TPMI field determined assuming the number of antenna ports / maximum rank / full power modes associated with SP_P2.

[0127] [Option 2] When STRP transmission (second method) related to the first or second panel / TRP / SRS resource set is indicated, the first TPMI field and the second TPMI field are applied, respectively.

[0128] If an STRP transmission associated with a first panel / TRP / SRS resource set is indicated, the UE applies the first TPMI field, and if an STRP transmission associated with a second panel / TRP / SRS resource set is indicated, the UE applies the second TPMI field.

[0129] <<Size of First TPMI Field>> The size of the first TPMI field may be dynamically changed among size #STxMP_P1, size #SP_P1, and size #X depending on the transmission method applied. When STxMP / SP_P1 / SP_P2 is indicated, the size of each TPMI field is changed so that the sum of the size of the first TPMI field and the size of the second TPMI field does not change.

[0130] When simultaneous multi-panel transmission is specified, the size of the first TPMI field is size #STxMP_P1 (FIG. 8A). When SP_P1 is specified, the size of the first TPMI field is size #SP_P1 (FIG. 8B). When SP_P2 is specified, the size of the first TPMI field is size #X (FIG. 8C). In this case, size #STxMP_P1 + size #STxMP_P2 = size #X + size #SP_P2.

[0131] As another example, the size of the first TPMI field may be the maximum value of size #STxMP_P1 and size #SP_P1.

[0132] <<Size of the Second TPMI Field>> When the size of the first TPMI field changes dynamically, the size of the second TPMI field changes dynamically between size #STxMP_P2, size #SP_P2, and size #Y. When STxMP / SP_P1 / SP_P2 are specified, the size of each TPMI field is changed so that the sum of the size of the first TPMI field and the size of the second TPMI field does not change.

[0133] When simultaneous multi-panel transmission is specified, the size of the second TPMI field is size #STxMP_P2 (FIG. 8A). When SP_P1 is specified, the size of the second TPMI field is size #Y (FIG. 8B). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P1 + size #Y. When SP_P2 is specified, the size of the second TPMI field is size #SP_P2 (FIG. 8C).

[0134] When the size of the first TPMI field is the maximum value among size #STxMP_P1 and size #SP_P1, the size of the second TPMI field is the maximum value among size #STxMP_P2 and size #SP_P2.

[0135] The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 are the same as in option 1.

[0136] [Option 3] When STRP transmission (second method) related to the first / second panel / TRP / SRS resource set is indicated, the UE may interpret the first / second TPMI field as a single combined field. For example, any of the following examples (1) to (6) may be applied.

[0137] (1) The first TPMI field is the Most Significant Bit (MSB), and the second TPMI field is the Least Significant Bit (LSB). (2) The second TPMI field is the MSB, and the first TPMI field is the LSB. (3) The first / last X bits of the first TPMI field are the MSB, and the second TPMI field is the LSB. (4) The first TPMI field is the MSB, and the first / last X bits of the second TPMI field are the LSB. (5) The first / last X bits of the second TPMI field are the MSB, and the first TPMI field is the LSB. (6) The second TPMI field is the MSB, and the first / last X bits of the first TPMI field are the LSB.

[0138] If a STRP transmission associated with a first panel / TRP / SRS resource set is indicated, the combined field for the first panel may be used. If a STRP transmission associated with a second panel / TRP / SRS resource set is indicated, the combined field for the second panel may be used.

[0139] The size of the first TPMI field is determined based on the number of antenna ports / maximum rank / full power modes associated with STxMP_P1, and the size of the second TPMI field is determined based on the number of antenna ports / maximum rank / full power modes associated with STxMP_P2.

[0140] In addition, in option 3, the UE may expect (assume) at least one of the following (1) to (3): (1) Size #STxMP_P1 + Size #STxMP_P2 ≥ Size #SP_P1 (2) Size #STxMP_P1 + Size #STxMP_P2 ≥ Size #SP_P2 (3) The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 are the same as in option 1.

[0141] [Variations] At least one of the following (1) to (10) may be applied to the constraints on the number of antenna ports / maximum rank / full power mode associated with STxMP_P1, STxMP_P2, SP_P1, and SP_P2.

[0142] (1) The UE expects the number of antenna ports / max rank / full power modes associated with STxMP_P1 to be the same as those for SP_P1. (2) The UE expects the number of antenna ports / max rank / full power modes associated with STxMP_P2 to be the same as those for SP_P2. (3) The UE expects the number of antenna ports / max rank / full power modes associated with SP_P1 to be the same as those for SP_P2. (4) The UE expects the number of antenna ports / max rank / full power modes associated with SP_P1 to be greater than or equal to those for SP_P2. (5) The UE expects the number of antenna ports / max rank / full power modes associated with STxMP_P1 to be the same as those for STxMP_P2. (6) The UE expects the number of antenna ports / max rank / full power modes associated with STxMP_P1 to be greater than or equal to those for STxMP_P2. (7) The UE expects size #SP_P1 = size #STxMP_P1. (8) The UE expects size #SP_P2 = size #STxMP_P2. (9) The UE expects size #SP_P1 = size #SP_P2. (10) The UE expects size #SP_P1 ≥ size #SP_P2.

[0143] The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 may be the same as in option 1.

[0144] According to the second embodiment, when STRP transmission is dynamically instructed, the first / second TPMI fields can be used appropriately.

[0145] <Third embodiment> For non-codebook (NCB) based PUSCH, when dynamic switching between a multi-panel simultaneous transmission SDM scheme (first scheme) and STRP transmission (second scheme in which PUSCH transmission is associated with one panel / TRP / SRS resource set) is applied (when a configuration for the switching is received) and STRP transmission (second scheme) is dynamically indicated (when an indication indicating STRP (second scheme) is received), at least one of the following options may be applied:

[0146] [Option 1] The UE may apply the first SRI field when STRP transmission (second scheme) associated with the first / second panel / TRP / SRS resource set is indicated.

[0147] <<Size of the First SRI Field>> The size of the first SRI field may be dynamically changed among size #STxMP_P1, size #SP_P1, and size #SP_P2 depending on the transmission method applied. When simultaneous multi-panel transmission is indicated, the size of the first SRI field is size #STxMP_P1 (FIG. 9A). When SP_P1 is indicated, the size of the first SRI field is size #SP_P1 (FIG. 9B). When SP_P2 is indicated, the size of the first SRI field is size #SP_P2 (FIG. 9C).

[0148] As another example, the size of the first SRI field may be the maximum value among size #STxMP_P1, size #SP_P1, and size #SP_P2.

[0149] The sizes #STxMP_P1, #SP_P1, and #SP_P2 may be configured by higher layer signaling, or may be configured based on the number of SRS resources for each SRS resource set.

[0150] <<Size of the Second SRI Field>> When the size of the first SRI field changes dynamically, the size of the second SRI field changes dynamically between size #STxMP_P2, size #X, and size #Y. When simultaneous multi-panel transmission / SP_P1 / SP_P2 is instructed, the size of each SRI field is changed so that the sum of the size of the first SRI field and the size of the second SRI field does not change.

[0151] When simultaneous multi-panel transmission is specified, the size of the second SRI field is size #STxMP_P2 (FIG. 9A). When SP_P1 is specified, the size of the second SRI field is size #X (FIG. 9B). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P1 + size #X. When SP_P2 is specified, the size of the second SRI field is size #Y (FIG. 9C). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P2 + size #Y.

[0152] If the size of the first SRI field is the maximum value among size #STxMP_P1, size #SP_P1, and size #SP_P2, the size of the second SRI field will be size #STxMP_P2.

[0153] Size #STxMP_P1 is the size of the SRI field determined assuming the number of SRS resources / maximum rank associated with STxMP_P1. Size #STxMP_P2 is the size of the SRI field determined assuming the number of SRS resources / maximum rank associated with STxMP_P2. Size #SP_P1 is the size of the SRI field determined assuming the number of SRS resources / maximum rank associated with SP_P1. Size #SP_P2 is the size of the SRI field determined assuming the number of SRS resources / maximum rank associated with SP_P2.

[0154] [Option 2] If STRP transmission (second method) related to the first or second panel / TRP / SRS resource set is indicated, the first SRI field and the second SRI field are applied, respectively.

[0155] If an STRP transmission associated with a first panel / TRP / SRS resource set is indicated, the UE applies the first SRI field, and if an STRP transmission associated with a second panel / TRP / SRS resource set is indicated, the UE applies the second SRI field.

[0156] <<Size of First SRI Field>> The size of the first SRI field may be dynamically changed among size #STxMP_P1, size #SP_P1, and size #X depending on the transmission method applied. When STxMP / SP_P1 / SP_P2 is indicated, the size of each SRI field is changed so that the sum of the size of the first SRI field and the size of the second SRI field remains unchanged.

[0157] When simultaneous multi-panel transmission is specified, the size of the first SRI field is size #STxMP_P1 (FIG. 10A). When SP_P1 is specified, the size of the first SRI field is size #SP_P1 (FIG. 10B). When SP_P2 is specified, the size of the first SRI field is size #X (FIG. 10C). In this case, size #STxMP_P1 + size #STxMP_P2 = size #X + size #SP_P2.

[0158] As another example, the size of the first SRI field may be the maximum value of size #STxMP_P1 and size #SP_P1.

[0159] <<Size of the Second SRI Field>> When the size of the first SRI field changes dynamically, the size of the second SRI field changes dynamically between size #STxMP_P2, size #SP_P2, and size #Y. When STxMP / SP_P1 / SP_P2 are specified, the size of each SRI field is changed so that the sum of the size of the first SRI field and the size of the second SRI field does not change.

[0160] When simultaneous multi-panel transmission is specified, the size of the second SRI field is size #STxMP_P2 (FIG. 10A). When SP_P1 is specified, the size of the second SRI field is size #Y (FIG. 10B). In this case, size #STxMP_P1 + size #STxMP_P2 = size #SP_P1 + size #Y. When SP_P2 is specified, the size of the second SRI field is size #SP_P2 (FIG. 10C).

[0161] If the size of the first SRI field is the maximum value among size #STxMP_P1 and size #SP_P1, the size of the second SRI field is the maximum value among size #STxMP_P2 and size #SP_P2.

[0162] The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 are the same as in option 1.

[0163] [Option 3] When STRP transmission (second method) related to the first / second panel / TRP / SRS resource set is indicated, the UE may interpret the first / second SRI fields as a single combined field. For example, any of the following examples (1) to (6) may be applied.

[0164] (1) The first SRI field is the Most Significant Bit (MSB) and the second SRI field is the Least Significant Bit (LSB). (2) The second SRI field is the MSB and the first SRI field is the LSB. (3) The first / last X bits of the first SRI field are the MSB and the second SRI field are the LSB. (4) The first SRI field is the MSB and the first / last X bits of the second SRI field are the LSB. (5) The first / last X bits of the second SRI field are the MSB and the first SRI field is the LSB. (6) The second SRI field is the MSB and the first / last X bits of the first SRI field are the LSB.

[0165] The size of the first SRI field is determined based on the number of SRS resources / maximum rank associated with STxMP_P1, and the size of the second SRI field is determined based on the number of SRS resources / maximum rank associated with STxMP_P2.

[0166] In addition, in option 3, the UE may expect (assume) at least one of the following (1) to (3): (1) Size #STxMP_P1 + Size #STxMP_P2 ≥ Size #SP_P1 (2) Size #STxMP_P1 + Size #STxMP_P2 ≥ Size #SP_P2 (3) The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 are the same as in option 1.

[0167] [Variations] There may be a restriction on the number of SRS resources associated with the first SRS resource set and the second SRS resource set. For example, the UE may expect the number of SRS resources associated with the first SRS resource set / panel / TRP to be greater than or equal to the number of SRS resources associated with the second SRS resource set / panel / TRP. Alternatively, the UE may expect the number of SRS resources associated with the first SRS resource set / panel / TRP to be the same as the number of SRS resources associated with the second SRS resource set / panel / TRP.

[0168] Regarding the maximum rank constraints associated with STxMP_P1, STxMP_P2, SP_P1, and SP_P2, at least one of the following (1) to (10) may be applied.

[0169] (1) The UE expects the number of maximum ranks associated with STxMP_P1 to be the same as those for SP_P1. (2) The UE expects the number of maximum ranks associated with STxMP_P2 to be the same as those for SP_P2. (3) The UE expects the number of maximum ranks associated with SP_P1 to be the same as those for SP_P2. (4) The UE expects the number of maximum ranks associated with SP_P1 to be greater than or equal to those for SP_P2. (5) The UE expects the number of maximum ranks associated with STxMP_P1 to be the same as those for STxMP_P2. (6) The UE expects the number of maximum ranks associated with STxMP_P1 to be greater than or equal to those for STxMP_P2. (7) The UE expects Size #SP_P1 = Size #STxMP_P1. (8) The UE expects size #SP_P2 = size #STxMP_P2. (9) The UE expects size #SP_P1 = size #SP_P2. (10) The UE expects size #SP_P1 ≥ size #SP_P2.

[0170] The definitions of size #STxMP_P1, size #STxMP_P2, size #SP_P1, and size #SP_P2 may be the same as in option 1.

[0171] According to the third embodiment, for NCB-based PUSCH, if STRP transmission is dynamically indicated, the first / second SRI fields can be used appropriately.

[0172] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0173] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0174] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0175] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0176] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0177] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0178] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0179] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0180] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0181] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0182] The specific UE capability may indicate at least one of the following: - Supporting specific processing / operation / control / information for at least one of the above embodiments; - Supporting the SDM scheme; - Supporting the SDM scheme for CB-based PUSCH; - Supporting the SDM scheme for NCB-based PUSCH; - Supporting different numbers of SRS resources associated with the first or second panel / TRP / SRS resource set for CB-based PUSCH; - Supporting different numbers of antenna ports / max rank / full power mode associated with STXMP_P1, STxMP_P2, SP_P1, SP_P2 for CB-based PUSCH; - Supporting different numbers of SRS resources associated with the first or second panel / TRP / SRS resource set for NCB-based PUSCH. Supporting different maximum ranks associated with STxMP_P1, STxMP_P2, SP_P1, SP_P2 in NCB-based PUSCH. Values ​​of X, Y in each embodiment.

[0183] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0184] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0185] At least one of the above-described embodiments may also be applied when the UE configures / activates / triggers specific information related to the above-described embodiments (or performs the operations of the above-described embodiments) through higher layer / physical layer signaling. For example, the specific information may be information related to dynamic switching between the simultaneous multi-panel transmission SDM scheme and STRP transmission for CB or NCB-based PUSCH, any RRC parameters for a specific release (e.g., Rel. 18 / 19), etc.

[0186] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0187] (Supplementary Notes) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiving unit that applies dynamic switching for a codebook-based physical downlink shared channel (PUSCH) between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) and a second scheme in which transmission of the PUSCH is associated with one panel, the terminal receiving an indication indicating the second scheme; and a control unit that applies at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a first transmit precoding matrix index (TPMI) field in downlink control information (DCI). [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein a size of the first SRI field and a size of the first TPMI field are dynamically changed depending on an applied transmission scheme. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein each SRI field size is changed so that the sum of the size of the first SRI field and the size of the second SRI field does not change, and each TPMI field size is changed so that the sum of the size of the first TPMI field and the size of the second TPMI field does not change. [Supplementary Note 4] The terminal according to any of Supplementary Note 1 to Supplementary Note 3, wherein the control unit, when the second method is instructed, combines and interprets the first SRI field and the second SRI field as a single field, and when the second method is instructed, the control unit, when the second method is instructed, combines and interprets the first TPMI field and the second TPMI field as a single field.

[0188] The following inventions are further appended with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal including: a receiving unit that applies dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) and a second scheme in which transmission of the PUSCH is associated with one panel for a non-codebook-based physical downlink shared channel (PUSCH), and that receives an indication indicating the second scheme; and a control unit that applies a first sounding reference signal (SRS) resource indicator (SRI) field in downlink control information (DCI). [Supplementary Note 2] The terminal according to Supplementary Note 1, in which a size of the first SRI field is dynamically changed depending on the applied transmission scheme. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, in which a size of each SRI field is changed so that a sum of a size of the first SRI field and a size of a second SRI field remains unchanged. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein, when the second method is instructed, the control unit combines the first SRI field and the second SRI field into one field and interprets the combined field.

[0189] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0190] 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0191] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0192] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0193] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0194] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0195] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0196] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0197] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0198] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0199] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0200] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0201] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0202] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0203] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0204] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0205] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0206] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0207] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0208] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0209] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0210] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0211] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0212] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0213] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0214] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0215] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0216] (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 transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0217] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0218] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0219] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0220] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0221] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0222] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0223] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0224] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0225] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0226] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0227] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0228] 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.

[0229] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0230] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0231] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0232] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0233] In addition, the transceiver unit 120 may apply dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for a codebook-based or non-codebook-based physical downlink shared channel (PUSCH) and a second scheme in which transmission of the PUSCH is associated with one panel, and may transmit an indication indicating the second scheme.

[0234] The control unit 110 may apply at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a first transmit precoding matrix index (TPMI) field in downlink control information (DCI).

[0235] (User Terminal) Fig. 13 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0236] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0237] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0238] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0239] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0240] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0241] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0242] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0243] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0244] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0245] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0246] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0247] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0248] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0249] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0250] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0251] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0252] In addition, the transceiver unit 220 may receive an indication indicating a dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for a non-codebook-based or codebook-based physical downlink shared channel (PUSCH) and a second scheme in which transmission of the PUSCH is associated with one panel.

[0253] The control unit 210 may apply at least one of a first sounding reference signal (SRS) resource indicator (SRI) field and a first transmit precoding matrix index (TPMI) field in downlink control information (DCI).

[0254] The size of the first SRI field and the size of the first TPMI field may be dynamically changed depending on the transmission scheme applied.

[0255] Each SRI field size may be changed so that the sum of the size of the first SRI field and the size of the second SRI field does not change, and each TPMI field size may be changed so that the sum of the size of the first TPMI field and the size of the second TPMI field does not change.

[0256] When the second method is instructed, the control unit 210 may combine and interpret the first SRI field and the second SRI field as one field, and when the second method is instructed, the control unit 210 may combine and interpret the first TPMI field and the second TPMI field as one field.

[0257] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0258] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0259] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 14 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0260] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0261] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0262] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0263] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0264] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0265] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0266] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0267] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0268] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0269] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0270] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0271] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0272] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0273] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0274] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0275] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0276] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0277] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0278] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0279] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0280] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0281] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0282] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0283] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0284] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0285] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0286] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0287] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0288] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0289] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0290] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0291] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0292] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0293] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0294] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0295] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0296] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0297] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0298] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0299] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0300] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0301] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0302] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0303] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0304] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0305] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0306] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0307] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0308] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0309] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0310] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0311] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0312] 15 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0313] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0314] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0315] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0316] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0317] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0318] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0319] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0320] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0321] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0322] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0323] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0324] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0325] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0326] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0327] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0328] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0329] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0330] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0331] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0332] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0333] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0334] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0335] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0336] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0337] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0338] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0339] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0340] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0341] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0342] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0343] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit configured to receive downlink control information (DCI) including an indication of a first scheme for a non-codebook-based physical uplink shared channel (PUSCH), wherein dynamic switching is applied between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM), in which transmission of the PUSCH is associated with two sounding reference signal (SRS) resource sets, and a second scheme, in which transmission of the PUSCH is associated with one SRS resource set; a controller that applies a first SRS resource indicator (SRI) of two SRIs in the DCI; The size of the field of the first SRI is determined based on the maximum number of layers when the multi-panel simultaneous transmission SDM is set and the maximum number of layers when the multi-panel simultaneous transmission SDM is not set. Terminal.

2. The size of the field of the second of the two SRIs is determined based on the maximum number of layers when the multi-panel simultaneous transmission SDM is set. The terminal according to claim 1 .

3. receiving downlink control information (DCI) including an indication that dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM), in which transmission of the non-codebook-based physical uplink shared channel (PUSCH) is associated with two sounding reference signal (SRS) resource sets, and a second scheme, in which transmission of the PUSCH is associated with one SRS resource set, is applied; applying a first SRS resource indicator (SRI) of two SRIs in the DCI; The size of the field of the first SRI is determined based on the maximum number of layers when the multi-panel simultaneous transmission SDM is set and the maximum number of layers when the multi-panel simultaneous transmission SDM is not set. The device's wireless communication method.

4. a transmitter configured to dynamically switch between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM) for a non-codebook-based physical uplink shared channel (PUSCH), in which transmission of the PUSCH is associated with two sounding reference signal (SRS) resource sets, and a second scheme in which transmission of the PUSCH is associated with one SRS resource set, and to transmit downlink control information (DCI) including an indication of the second scheme; a controller that applies a first SRS resource indicator (SRI) of two SRIs in the DCI; The size of the field of the first SRI is determined based on the maximum number of layers when the multi-panel simultaneous transmission SDM is set and the maximum number of layers when the multi-panel simultaneous transmission SDM is not set. Base station.

5. A system including a terminal and a base station, The base station The present invention provides a non-codebook-based physical uplink shared channel (PUSCH) in which dynamic switching between a first scheme using multi-panel simultaneous transmission spatial division multiplexing (SDM), in which transmission of the PUSCH is associated with two sounding reference signal (SRS) resource sets, and a second scheme, in which transmission of the PUSCH is associated with one SRS resource set, is applied, and a transmitter that transmits downlink control information (DCI) including an indication of the second scheme; The terminal a receiving unit for receiving the downlink control information (DCI); a controller that applies a first SRS resource indicator (SRI) of two SRIs in the DCI; The size of the field of the first SRI is determined based on the maximum number of layers when the multi-panel simultaneous transmission SDM is set and the maximum number of layers when the multi-panel simultaneous transmission SDM is not set. system.