Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives at least one of first information related to a multi-panel method, second information related to the configuration of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field; and a control unit that determines, when transmitting an uplink shared channel with a phase tracking reference signal (PTRS), at least one among the number of layers and the coherent type of the uplink shared channel used for the power ratio of the uplink shared channel pair PTRS on the basis of at least one among the first information, the second information, and the downlink control information.

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, a UE will be able to use one of multiple panels (or multiple beams) for uplink (UL) transmission. Furthermore, in Rel. 18 and later, support for simultaneous transmission across multiple panels (STxMP) is being considered to improve UL throughput and reliability.

[0006] However, there has been insufficient consideration on how to control UL transmission using multiple panels (e.g., simultaneous UL transmission) when supported. For example, when transmitting an uplink shared channel with a phase tracking reference signal (PTRS) using multiple panels, how to control the transmission power of the uplink shared channel and the PTRS becomes an issue.

[0007] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control UL transmission even when UL transmission is performed using multiple panels.

[0008] A terminal according to one aspect of the present disclosure includes: a receiving unit that receives at least one of first information related to a multi-panel scheme, second information related to configuration of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field; and a control unit that, when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS), determines at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS, based on at least one of the first information, the second information, and the downlink control information.

[0009] According to one aspect of the present disclosure, even when UL transmission is performed using multiple panels, UL transmission can be appropriately controlled.

[0010] Figure 1 shows an example of the association between precoder types and TPMI indexes. Figures 2A and 2B show an example of single-panel transmission. Figures 3A to 3C show an example of multi-panel transmission. Figures 4A to 4D show an example of single-DCI-based STxMP. Figures 5A and 5B show an example of single-DCI-based STxMP. Figures 6A to 6C show an example of multi-DCI-based STxMP. Figures 7A and 7B show an example of the PTRS-DMRS association field in Rel. 16. Figure 8 shows an example of DMRS port-PUSCH antenna port-PTRS port association (or association candidates). Figure 9 shows an example of the PTRS-DMRS association field in Rel. 17. Figures 10A and 10B show another example of the PTRS-DMRS association field in Rel. 17. Figures 11A and 11B show an example of the PTRS-DMRS association field in Rel. 16. FIG. 12 is a diagram illustrating an example of a PTRS-DMRS related field in IEEE 802.11b and later. FIG. 12 illustrates an example of a power ratio of PUSCH to PTRS for each RE for each layer. FIGS. 13A and 13B illustrate an example of a power ratio of PUSCH to PTRS for each RE for each layer. FIG. 14 is a diagram illustrating an example of an SRS resource set indicator. FIG. 15 is a diagram illustrating an example of an STxMP SDM scheme in which per-panel PTRS power control (e.g., PTRS power boosting) is supported according to the first embodiment. FIG. 16 is a diagram illustrating an example of an STxMP SDM scheme in which per-panel PTRS power control (e.g., PTRS power boosting) is not supported according to the second embodiment. FIG. 17 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 18 is a diagram illustrating an example of a configuration of a base station according to an embodiment. FIG. 19 is a diagram illustrating an example of a configuration of a user terminal according to an embodiment. FIG. 20 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment. FIG. 21 is a diagram illustrating 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] 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.

[0017] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), etc.

[0018] 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.

[0019] 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").

[0020] Fully coherent may mean that all antenna ports used for transmission are synchronized (may be expressed as being able to match the phase, being able to control the phase for each coherent antenna port, being able to apply a precoder appropriately for each coherent antenna port, 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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).

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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).

[0029] 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).

[0030] (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)).

[0031] 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").

[0032] 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).

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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).

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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).

[0043] 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.

[0044] 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).

[0045] 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).

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Incidentally, future wireless communication systems (e.g., Rel. 18 NR and later) are expected to support simultaneous UL transmission (e.g., simultaneous multi-panel UL transmission (SiMPUL)) using multiple beams / panels / TRPs toward one or more transmission / reception points (TRPs).

[0052] For example, Rel. 18 considers simultaneous UL transmission using up to two TRPs per two panels. It also considers single-DCI-based and multi-DCI-based multi-TRP operation, and assumes that the total number of layers across all panels is up to four, and the total number of codewords across all panels is up to two. Of course, the number of TRPs, panels, layers, and codewords are not limited to these.

[0053] (Single Panel Transmission) Single panel UL transmission or a candidate single panel UL transmission scheme may employ at least one of the following transmission schemes A and B (single panel UL transmission schemes A and B). In the present disclosure, panel / UE panel may be interpreted as a UE capability value set (e.g., a UE capability value set) reported for each UE capability. In the present disclosure, different panels, different spatial relationships, different joint TCI states, different TPC parameters, different antenna ports, etc. may be interpreted as interchangeable terms.

[0054] <Transmission Scheme A: Single Panel Single TRP UL Transmission> In Rel. 15 and Rel. 16, a transmission scheme is used in which a UE transmits UL for one TRP at a time from only one beam and panel (FIG. 2A).

[0055] <Transmission Scheme B: Single Panel Multi-TRP UL Transmission> Rel. 17 considers UL transmission from only one beam and panel at a time and repeated transmission for multiple TRPs (Fig. 2B). In the example of Fig. 2B, the UE transmits a PUSCH from panel #1 to TRP #1 (switching beams and panels), and then transmits a PUSCH from panel #2 to TRP #2. The two TRPs are connected via an ideal backhaul.

[0056] (Multi-panel Transmission) In Rel. 18 and later, in order to improve UL throughput / reliability, support for simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (STxMP)) for one or more TRPs is being considered. Also, a multi-panel UL transmission scheme is being considered for a specific UL channel (e.g., PUSCH / PUCCH).

[0057] For example, a maximum of X panels (e.g., X = 2) and a maximum of Y panels (e.g., Y = 2) may be supported for multi-panel UL transmission. Note that the values ​​of X and Y are not limited to these. In multi-panel UL transmission, if UL precoding instructions for PUSCH are supported, a codebook of an existing system (e.g., Rel. 16 or earlier) may be supported for simultaneous multi-panel transmission. Considering single DCI and multi-DCI-based multi-TRP operation, the number of layers may be up to x (e.g., x = 4) in all panels, and the number of codewords (CWs) may be up to y (e.g., y = 2) in all panels. Note that the values ​​of x and y are not limited to these.

[0058] At least one of the following methods 1 to 3 (multi-panel UL transmission methods 1 to 3) is being considered as a multi-panel UL transmission method or a candidate multi-panel UL transmission method. Only one of transmission methods 1 to 3 may be supported. Multiple methods including at least one of transmission methods 1 to 3 may be supported, and one of the multiple transmission methods may be configured in the UE.

[0059] <Transmission Scheme 1: Coherent Multi-Panel UL Transmission> 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 UL.

[0060] 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. Transmission 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.

[0061] <Transmission Scheme 2: Non-coherent Multi-Panel UL Transmission of One Codeword (CW) or Transport Block (TB)> The multiple panels may not be synchronized. Different layers are mapped to one CW or TB for different panels and PUSCHs from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels. This transmission scheme may use up to four layers or up to eight layers for the UL. If up to eight layers are supported, this transmission scheme may support one CW or TB using up to eight layers.

[0062] 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. Transmission scheme 2 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0063] <Transmission Scheme 3: Non-coherent Multi-Panel UL Transmission of Two CWs or TBs> The multiple panels may not be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCHs from the 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 transmission scheme may use up to four layers or up to eight layers for the UL. When up to eight layers are supported, this transmission scheme may support up to four layers per CW or TB.

[0064] 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. Transmission scheme 3 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0065] In each of the above transmission schemes, the base station may configure or indicate panel-specific transmission for UL transmission using UL TCI or panel ID. UL TCI (UL TCI state) may be based on signaling similar to DL beam indication supported in Rel. 15. The panel ID may be implicitly or explicitly applied to transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. When 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).

[0066] (Simultaneous Multi-Panel Transmission) In Rel. 18 and later, in one or more of the above-mentioned transmission schemes / modes, multi-panel UL transmission (e.g., simultaneous transmission across multiple panels (STxMP)) for PUSCH scheduling based on one DCI (single DCI) / PUSCH scheduling based on multiple DCIs (multi-DCI) is being considered.

[0067] For example, in Rel. 18, the following STxMPs are expected to be supported: Single DCI PUSCH SDM scheme, Single DCI PUSCH SFN scheme, Single DCI PUCCH SFN scheme, Multi-DCI overlapping PUSCH+PUSCH scheme.

[0068] <Single DCI-based STxMP> In Rel. 18 and later, a UE with multiple panels (e.g., Panel #1 and Panel #2) may support simultaneous multi-panel transmission (STxMP) in a single DCI-based multi-TRP system (see Figure 4A). In single DCI-based STxMP, the following scheme may be applied for UL transmission (e.g., PUSCH, PUCCH, or PUSCH+PUCCH).

[0069] Space Division Multiplexing (SDM) scheme (PUSCH): Different layers / DMRS ports of one PUSCH are separately precoded and transmitted simultaneously from different UE panels / beams (see Fig. 4B). Single Frequency Network (SFN)-based transmission scheme (PUSCH): All layers / DMRS ports of one PUSCH are transmitted simultaneously from two different UE panels / beams (see Fig. 4C). Single Frequency Network (SFN)-based transmission scheme (PUCCH): One PUCCH is transmitted simultaneously from different panels (see Fig. 4D).

[0070] Figure 4B shows an example of a case where the SDM scheme for a single DCI-based PUSCH is applied. The UE may assume that repeated SDM PUSCH transmissions are scheduled on the same time and frequency resources. That is, when using coherent panels, the UE may transmit repeated SDM PUSCH transmissions on the same time and frequency resources. Figure 4B shows a case where the time and frequency resources of Layer #1 and Layer #2 corresponding to the PUSCH are the same.

[0071] 4B may be applied to a case where SDM is applied to one CW (or TB), or may be applied to a case where SDM is applied to two CWs (or TBs). When SDM is applied to two CWs, two CWs simultaneously transmitted from two different panels are spatially multiplexed.

[0072] Figure 4C illustrates an example of a single DCI-based PUSCH SFN-based transmission scheme. In SFN, a UE transmits the same signal from each panel corresponding to a different TCI state (e.g., joint / UL TCI state) to the same RE. Here, all layers (e.g., Layers 1-2) / DMRS ports of one PUSCH are transmitted simultaneously from two different UE panels (e.g., Panel 1 and Panel 2).

[0073] 4D shows an example of a single DCI-based PUCCH SFN-based transmission scheme, in which one PUCCH is simultaneously transmitted from different panels (e.g., panel #1 and panel #2).

[0074] In the SDM / SFN scheme of a single DCI-based PUSCH, multiple (e.g., two) SRS resource sets may be configured and multiple (e.g., two) SRI / TPMI fields may be indicated.

[0075] In the SFN scheme for single DCI-based PUCCH, multiple (eg, two) TCI states may be applied to one PUCCH resource.

[0076] <Multi-DCI-Based STxMP> In Rel. 18 and later, a UE with multiple panels (e.g., Panel #1 and Panel #2) may support simultaneous multi-panel transmission (STxMP) in a multi-DCI-based multi-TRP system (see Figure 5A). In multi-DCI-based STxMP, simultaneous transmission of UL channels / UL signals (e.g., PUSCH+PUSCH) may be supported (see Figure 5B). For example, two overlapping PUSCHs in the time domain are associated with different TRPs and transmitted simultaneously from different UE panels / beams.

[0077] A UE may simultaneously transmit two independent PUSCHs associated with different TRPs in the same active BWP. The total number of layers corresponding to the two independent PUSCHs may be specified as a maximum of X (or less than or equal to X), where X may be, for example, 4 or some other value. The maximum number of layers for each of the two PUSCHs may be X / 2 (e.g., 2) or some other value. The two independent PUSCHs may also be associated with different CORESET pool indices.

[0078] In a multi-DCI-based PUSCH+PUSCH, multiple (e.g., two) SRS resource sets may be configured, and the two SRS resource sets may be associated with different (e.g., two) CORESET pool indices, respectively.

[0079] In Rel. 18, simultaneous transmission of PUSCHs (e.g., PUSCH+PUSCH scheme) is supported as multi-DCI-based STxMP. Furthermore, in Rel. 19 and later, simultaneous transmission including an uplink control channel (e.g., PUCCH) (e.g., STxMP PUCCH+PUCCH, STxMP PUCCH+PUSCH) is also expected to be supported as multi-DCI-based STxMP.

[0080] FIG. 6A shows an example of multi-DCI-based STxMP PUSCH+PUSCH, FIG. 6B shows an example of multi-DCI-based STxMP PUCCH+PUCCH, and FIG. 6C shows an example of multi-DCI-based STxMP PUCCH+PUSCH.

[0081] In STxMP PUSCH+PUSCH (see FIG. 6A), two PUSCHs are associated with different TRPs and transmitted simultaneously from a UE panel. The two PUSCHs may be partially / fully overlapping in the time domain or partially / fully / non-overlapping in the frequency domain. TRP may be replaced with panel, CORESET pool index, SRS resource set, SSB group, CSI-RS group, TCI state, or group of TCI states.

[0082] In STxMP PUCCH+PUCCH (see Fig. 6B), two PUCCHs are associated with different TRPs and transmitted simultaneously from the UE panel, and the two PUCCHs may be partially / fully overlapping in the time domain and partially / fully / non-overlapping in the frequency domain.

[0083] In STxMP PUCCH+PUSCH (see Figure 6C), one PUCCH and one PUSCH are associated with different TRPs and transmitted simultaneously from the UE panel, and the PUCCH and PUSCH may be partially / fully overlapping in the time domain and partially / fully / non-overlapping in the frequency domain.

[0084] <PTRS> Rel. 15 NR supports a Phase Tracking Reference Signal (PTRS). A base station may transmit the PTRS in the downlink. The base station may map the PTRS contiguously or discontinuously in the time direction to a predetermined number of subcarriers (e.g., one subcarrier) and transmit the PTRS.

[0085] The UE may receive the PTRS, for example, during at least a portion of a period (slot, symbol, etc.) during which a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) is scheduled (in other words, during which the PDSCH is received). The PTRS transmitted by the base station may be referred to as a DL PTRS.

[0086] The UE may also transmit the PTRS on the uplink. The UE may map the PTRS contiguously or discontinuously in the time direction on a predetermined number of subcarriers (for example, one subcarrier) and transmit the PTRS.

[0087] For example, the UE may transmit the PTRS during at least a portion of a period (slot, symbol, etc.) in which the Physical Uplink Shared Channel (PUSCH) is scheduled (in other words, the period in which the PUSCH is transmitted). The PTRS transmitted by the UE may be referred to as an UL PTRS.

[0088] The base station or UE may determine phase noise based on the received PTRS and correct the phase error of the received signal (e.g., PUSCH, PDSCH).

[0089] The UE may be configured with PTRS configuration information (PTRS-DownlinkConfig for DL ​​and PTRS-UplinkConfig for UL) using higher layer signaling. For example, the PTRS configuration information may be included in configuration information (DMRS-DownlinkConfig, DMRS-UplinkConfig) of a demodulation reference signal (DMRS) for PDSCH or PUSCH.

[0090] <PTRS and DMRS> In NR (e.g., Rel. 15), a DMRS port associated with a PTRS port is assumed to be QCL with respect to QCL types A and D. In other words, when a PTRS port is associated with a DMRS port, the PTRS port and the DMRS port may be assumed to be in a QCL type A and D relationship with each other.

[0091] Rel. 16 NR supports the association between a PTRS port and a DMRS port (e.g., PTRS-DMRS association) being indicated by a predetermined field in the DCI. The predetermined field may be referred to as a PTRS-DMRS association field or a PTRS-DMRS association field (e.g., a PTRS-DMRS association field).

[0092] Meanwhile, Rel. 16 NR has agreed to support up to two PTRS ports (a first PTRS port and a second PTRS port) for single PDCCH-based multi-panel / TRP transmission. The number of applied / configured PTRS ports (e.g., one or two PTRS ports) may be signaled to the UE by a higher layer parameter.

[0093] When one PTRS port (e.g., PTRS port #0) is configured, the association between the PTRS and the DMRS may be determined based on the code points specified in the PTRS-DMRS association field of the DCI and the correspondence (e.g., table) between each code point and the DMRS port. The correspondence (e.g., table) between each code point and the DMRS port may be predefined (see FIG. 7A).

[0094] Figure 7A shows a case where each code point (here, 0 to 3) in the PTRS-DMRS related field corresponds to a specific DMRS port (here, the first to fourth scheduled DMRS ports correspond, respectively).

[0095] When two PTRS ports (e.g., PTRS port #0 and PTRS port #1) are configured, the association between each PTRS and the DMRS may be determined based on the code points specified in the PTRS-DMRS association field of the DCI and the correspondence (e.g., table) between each code point and the DMRS port. The correspondence (e.g., table) between each code point and the DMRS port may be defined in advance (see FIG. 7B).

[0096] For example, some of the code points (e.g., the most significant bit (MSB)) may be used to specify the DMRS port for PTRS port #0, and the remaining code points (e.g., the least significant bit (LSB)) may be used to specify the DMRS port for PTRS port #1.

[0097] 7B shows a case where the first DMRS among the DMRSs sharing PTRS #0 is designated when the MSB (here, 1 bit) is 0, and the second DMRS among the DMRSs sharing PTRS #0 is designated when the MSB is 1. Also, a case where the first DMRS among the DMRSs sharing PTRS #0 is designated when the LSB (here, 1 bit) is 0, and the second DMRS among the DMRSs sharing PTRS #0 is designated when the MSB is 1, is shown.

[0098] Information regarding the DMRS (e.g., first DMRS / second DMRS) that shares each PTRS (here, PTRS #0, #1) may be specified in advance, or may be explicitly or implicitly notified by the base station to the UE via DCI / RRC.

[0099] For example, a PUSCH antenna port corresponding to each PTRS port may be defined / configured in advance, and predetermined information regarding the correspondence between the PUSCH antenna port and the DMRS port may be notified to the UE by DCI / RRC. The UE may determine the association between the DMRS port and the PTRS port based on the information regarding the correspondence between the DMRS port and the PUSCH antenna port notified from the base station and the predefined correspondence between the PUSCH antenna port and the PTRS port.

[0100] The predetermined information regarding the correspondence between the PUSCH antenna ports and the DMRS ports may be indicated to the UE by a predetermined field included in the DCI (e.g., the DCI used for scheduling the PUSCH). The predetermined field may be at least one of a "Precoding information and number of layers" field and an "Antenna ports" field.

[0101] For example, it may be defined that PUSCH antenna ports 1000 and 1002 in a designated Transmitted Precoding Matrix Indicator (TPMI) share PTRS port #0, and PUSCH antenna ports 1001 and 1003 in a designated TPMI share PTRS port #1. The TPMI may be specified by the "Precoding information and number of layers" field of the DCI (see FIG. 8).

[0102] PTRS port #0 may be associated with UL layer 'x' of multiple layers transmitted on PUSCH antenna port 1000 and PUSCH antenna port 1002 in the indicated TPMI. PTRS port #1 may be associated with UL layer 'y' of multiple layers transmitted on PUSCH antenna port 1001 and PUSCH antenna port 1003 in the indicated TPMI. x / y may be provided by a PTRS-DMRS association field included in the DCI (e.g., FIG. 7B).

[0103] The specifications may define that PUSCH antenna ports 1000 and 1002 share PTRS port #0, and that PUSCH antenna ports 1001 and 1003 share PTRS port #1. Predetermined information from the base station (hereinafter also referred to simply as "TPMI") may indicate which layer / DMRS port is transmitted from which PUSCH antenna port. This means that the TPMI indicates which layer / DMRS port shares which PTRS port. The PTRS-DMRS association field may indicate that one layer / DMRS port from multiple layers / DMRS ports shares the PTRS port.

[0104] Rel. 17 supports multi-TRP PUSCH repetition using time division multiplexing (TDM) (e.g., TDM M-TRP PUSCH repetition), and PTRS-DMRS association may be indicated on a per-TRP basis.

[0105] When a maximum rank is two (e.g., maxrank=2) and one PTRS port is used, the PTRS-DMRS association of two TRPs may be indicated by a PTRS-DMRS association field (e.g., one field). For example, the MSB of the PTRS-DMRS association field may indicate the first TRP, and the LSB of the PTRS-DMRS association field may indicate the second TRP (see FIG. 9).

[0106] When one or two PTRS ports are used with a maximum rank greater than two (e.g., maxrank>2), the PTRS-DMRS association of the two TRPs may be indicated by a PTRS-DMRS association field and a second PTRS-DMRS association field (see Figures 10A and 10B). Figure 10A shows an example of the PTRS-DMRS association field when one PTRS is configured / applied, and Figure 10B shows an example of the PTRS-DMRS association field when two PTRSs are configured / applied.

[0107] It is assumed that Rel. 18 and later will support the configuration of the spatial multiplexing scheme as a multi-panel scheme. A network (e.g., a base station) may configure the spatial multiplexing scheme (sdmscheme) in a UE as an upper layer parameter for the multi-panel scheme (multipanelScheme). When the spatial multiplexing scheme is configured as a multi-panel scheme, the maximum number of PTRS ports may be provided to the UE by an upper layer parameter for the maximum number of ports for SDM (maxNrofPortsforSDM).

[0108] If one PTRS port (or one PTRS port) is configured, the PTRS-DMRS association field indicates the association between the PTRS port and the DMRS port corresponding to two SRS resource sets (or two panels).

[0109] For example, when one PTRS port is configured by the upper layer parameter (maxNrofPortsforSDM) related to the maximum number of ports for SDM in the UL PTRS configuration (PTRS-UplinkConfig), the SRS resource set indicator field is present and equal to a specific codepoint, and the multipanel scheme is set to the spatial scheme (sdmScheme), the PTRS-DMRS association field may be configured with predetermined bits (e.g., 2 bits). In this case, the PTRS-DMRS association field may indicate an association between the PTRS port and the DMRS port corresponding to at least one of the SRS resource indicator field and the second SRS resource indicator field, and the precoding information and number of layers field and the second precoding information field according to a predetermined association / Table A (e.g., FIG. 11A).

[0110] When two PTRS ports (or two PTRS ports) are configured, the first PTRS port (e.g., PTRS port 0) corresponds to the first SRS resource set (or first panel), and the second PTRS port (e.g., PTRS port 1) corresponds to the second SRS resource set (or second panel).

[0111] For example, if two PTRS ports are configured by the upper layer parameter (maxNrofPortsforSDM) related to the maximum number of ports for SDM in the UL PTRS configuration (PTRS-UplinkConfig), the SRS resource set indicator field is present and equal to a specific codepoint, and the multipanel scheme is set to the spatial scheme (sdmScheme), the PTRS-DMRS association field may be configured with predetermined bits (e.g., two bits). In this case, the most significant bit (MSB) of the PTRS-DMRS association field may indicate an association between a first PTRS port (e.g., PTRS port 0) and a DMRS port corresponding to the SRS resource indicator field and at least one of the precoding information and layer number fields according to a predetermined association / Table B (e.g., FIG. 11B). Additionally, the least significant bit (LSB) of the PTRS-DMRS association field may indicate an association between a second PTRS port (e.g., PTRS port 1) and a DMRS port corresponding to at least one of the second SRS resource identifier field and the second precoding information field according to a predetermined association / table B (e.g., FIG. 11B).

[0112] The specific code point of the SRS resource set indicator field may be, for example, "10." When the SRS resource set indicator field indicates a specific code point (for example, "10"), this may mean that application of SDM in multi-panel transmission (STxMP) is indicated (for example, separate MIMO layer transmission is performed in multiple beams using both of two SRS resource sets).

[0113] If the SRS resource set identifier field indicates a code point other than a specific code point (e.g., "00" / "01"), this may mean that single-panel transmission using only one SRS resource set (or one SRS resource set) is indicated. Also, code points other than the specific code point (e.g., "11") may be configured not to be applied (reserved) in the SDM of STxMP.

[0114] (Transmission power ratio between PTRS and PUSCH) When the UE is in the UL, P = {1, 2} PTRS ports and the number of layers to be scheduled is n layer PUSCH If , the UE may follow the procedure below: If the UE is configured with an upper layer parameter ptrs-Power (UL-PTRS-power), the PUSCH to PTRS power ratio ρ PTRS PUSCH is ρ PTRS PUSCH =-α PTRS PUSCH [dB], where α PTRS PUSCH is shown by the table (association) in FIG. 12 according to the upper layer parameter ptrs-Power, and the PTRS scaling factor β PTRS is β PTRS =10^(-ρ PTRS PUSCH / 20) and the field 'Precoding Information and Number of Layers' in the DCI. The UE shall assume that if ptrs-Power in PTRS-Config is not set or in the case of non-codebook based PUSCH, ptrs-Power in PTRS-Config is set to state '00' in the table.

[0115] In fully coherent mode, the number of PTRS ports is always 1.

[0116] One PTRS port is precoded by (number of ports * number of layers = 1) precoding matrices. The PUSCHs of X layers are precoded by (number of ports * number of layers) precoding matrices. As a result, the transmission power ratio of the PTRS to the PUSCH for each RE and layer is 10log 10 (Number of PUSCH layers) [dB].

[0117] In non-coherent mode, the number of PTRS ports is 1 or 2.

[0118] If UL-PTRS-power="00", the PTRS port borrows power from a different RE of the same layer (RE used for PTRS on a different port). If the number of PTRS ports is 1, no power boosting is performed. Otherwise, if the number of PTRS ports is 2, the RE for the PTRS on another port is muted and its power is borrowed.

[0119] If UL-PTRS-power="01", the PTRS port borrows power from the same RE of a different layer. Therefore, the transmit power ratio of PTRS to PUSCH per RE per layer is 10log 10 (Number of PUSCH layers) [dB] is always supported.

[0120] In partial coherence, the number of PTRS ports is one or two.

[0121] When UL-PTRS-power="00", a combination of two power borrowing methods is used: borrowing power from different REs of the same layer (REs used for PTRS on different ports) and borrowing power from the same RE on different layers (outside the coherent group). For a 4-layer PUSCH, two coherent groups are considered. If the number of PTRS ports is 1, the PTRS port borrows power from the same RE on different layers within the coherent group. That is, the transmit power ratio of PTRS to PUSCH per RE per layer is 10log 10(number of PUSCH layers in the coherent group) [dB]. Otherwise, if the number of PTRS ports is 2, power is borrowed from the same RE on different layers in the coherent group, and power is borrowed from different REs on the same layer that are used for PTRS on another layer. That is, the transmission power ratio of PTRS to PUSCH per RE per layer is 10log 10 {(number of PUSCH layers in a coherent group) * (number of PTRS ports)} [dB].

[0122] If UL-PTRS-power="01", the PTRS port borrows power from the same RE of a different layer. Therefore, the transmit power ratio of PTRS to PUSCH per RE per layer is 10log 10 (Number of PUSCH layers) [dB] is always supported.

[0123] In Rel. 18 and later, when the STxMP SDM scheme is supported, the power ratio of PTRS / PUSCH per layer per RE (e.g., α PTRS PUSCH It is also assumed that the above values) are also applied / supported to the SDM method of STxMP.

[0124] In this case, it is not clear how the UE should consider Qp (number of PTRS ports), number of scheduled layers, and coherence type to determine the PUSCH to PT-RS power ratio for SDM PUSCH transmission in STxMP.

[0125] Thus, when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS) using multiple panels, the problem arises as to how to control the transmission power of the uplink shared channel and the PTRS.

[0126] Therefore, the present inventors have studied the transmission power (e.g., the power ratio of PUSCH to PTRS) when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS) using multiple panels, and have conceived the present embodiment.

[0127] 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.

[0128] 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."

[0129] 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.

[0130] 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.

[0131] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0132] 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.

[0133] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0134] 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.

[0135] 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.

[0136] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and the TCI may be interchangeable with each other.

[0137] Furthermore, the panel identifier (ID) and the panel may be interchangeable. That is, the TRP ID and the TRP, the CORESET group ID and the CORESET group, etc. may be interchangeable.

[0138] In the present disclosure, the terms TRP, transmission point, panel, DMRS port group, CORESET pool, and one of two TCI states associated with one code point in the TCI field may be read interchangeably.

[0139] In the present disclosure, transmission / reception of a channel / signal using a single TRP may be interpreted as the TCI states (joint / separate / indicated TCI states) being equal in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repeat), or the number of TCI states (joint / separate / indicated TCI states) being one in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repeat).

[0140] Transmission / reception of a channel / signal using a single TRP may also be interpreted as the TCI states (joint / separate / indicated TCI states) being different in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repeat), or the number of different TCI states (joint / separate / indicated TCI states) being multiple (e.g., two) in the transmission / reception of the channel / signal (e.g., NCJT / CJT / repeat).

[0141] In this disclosure, the terms single TRP, single TRP system, single TRP transmission, and single PDSCH may be interchangeable. In this disclosure, the terms multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be interchangeable.

[0142] In the present disclosure, a single DCI, a single PDCCH, multiple TRPs based on a single DCI, activating two TCI states on at least one TCI code point, mapping at least one code point of a TCI field to two TCI states, and setting a specific index (e.g., a TRP index, a CORESET pool index, or an index corresponding to a TRP) for a specific channel / CORESET may be read interchangeably.

[0143] In the present disclosure, the terms single TRP, channel / signal using single TRP, channel using one TCI state / spatial relationship, multi-TRP not enabled by RRC / DCI, multiple TCI states / spatial relationships not enabled by RRC / DCI, a CORESETPoolIndex value of 1 not set for any CORESET, and no code point in the TCI field mapped to two TCI states may be read interchangeably.

[0144] In the present disclosure, multi-TRP, channel / signal using multi-TRP, channel using multiple TCI states / spatial relationships, multi-TRP enabled by RRC / DCI, multiple TCI states / spatial relationships enabled by RRC / DCI, and at least one of multi-TRP based on a single DCI and multi-TRP based on multiple DCI may be read interchangeably.

[0145] In the present disclosure, single DCI (sDCI), single PDCCH, multi-TRP system based on single DCI, sDCI-based MTRP, and activation of two TCI states on at least one TCI codepoint may be read interchangeably.

[0146] In the present disclosure, the terms channel, signal, and channel / signal may be interchangeable. In the present disclosure, the terms DL channel, DL signal, DL signal / channel, transmission / reception of DL signal / channel, DL reception, and DL transmission may be interchangeable. In the present disclosure, the terms UL channel, UL signal, UL signal / channel, transmission / reception of UL signal / channel, UL reception, and UL transmission may be interchangeable.

[0147] (Wireless Communication Method) (Analysis) Considering that the number of scheduled layers for each panel and the coherence type of the designated precoder for each panel may differ, it is possible to use / apply the number of PUSCH layers and coherence type for each panel. The PTRS port PUSCH-to-PTRS power ratio may be configured to be determined according to the number of layers / coherence type of the panel to which the PTRS port is associated. This may be applied whether the number of PTRS ports is one or two.

[0148] If the number of PTRS ports is 1, the PTRS may be associated with a layer selected from layers (multiple layers) spanning both (two) panels. In this case, it is possible that the PTRS associated with one panel may not borrow power from a layer of the other panel.

[0149] Considering the above, the number of layers and coherence type of PUSCH should be panel-based, but on the other hand, if two PTRS ports are scheduled, the number of PTRS ports (Qp) may be assumed to be two, which allows power to be borrowed from the other PTRS port.

[0150] In the following description, PTRS transmission when transform precoding is not enabled is used as an example, but applicable configurations are not limited to this. Also, in the following description, a single DCI-based STxMP SDM method (e.g., PUSCH + PUSCH) and a STxMP SFN method (e.g., PUSCH + PUSCH) are used as examples, but applicable configurations are not limited to this.

[0151] <First embodiment> The first embodiment relates to an example of a PTRS transmission procedure / transmission control when an SDM method / SFN method (e.g., PUSCH+PUSCH) of STxMP is supported. The first embodiment is suitably applied to a case where PTRS power control (e.g., PTRS power boost) per panel (or per SRS resource set) is supported, but is not limited thereto.

[0152] The UE is scheduled with Qp={1, 2} PTRS ports in the UL for PTRS transmission, and the number of scheduled layers is n layer PUSCH If so, at least one of the following PTRS transmission operation #1-1 and PTRS transmission operation #1-2 may be applied.

[0153] [PTRS Transmission Operation #1-1] As PTRS transmission operation #1-1, the UE may perform at least one of the following procedures: If the UE is configured with higher layer parameters related to PTRS power (ptrs-Power), the PUSCH-to-PTRS power ratio ρ PTRS PUSCH is ρ PTRS PUSCH =-α PTRS PUSCH may be given by [dB], where α PTRS PUSCH is shown by the table (association) in Fig. 13A and 13B according to the higher layer parameter ptrs-Power, and the PTRS scaling factor β PTRS is β PTRS =10^(-ρ PTRS PUSCH / 20) and the 'Precoding Information and Number of Layers' field in the DCI. - If ptrs-Power in the UL configuration of the PTRS (e.g., PTRS-UplinkConfig) is not configured, or in the case of a non-codebook-based PUSCH, the UE may assume that ptrs-Power in PTRS-UplinkConfig is set to the state "00" in the table of Figure 13A. - In the case of a partially coherent codebook for 8TX PUSCH (see Figure 13B), Lx corresponds to the number of PUSCH layers in the antenna group to which PTRS port x is coherently precoded with the associated PUSCH layer / DMRS port, and Qp corresponds to the number of PTRS ports scheduled to the UE.

[0154] The upper layer parameter for PTRS power (ptrs-Power) may refer to the UL PTRS power boosting factor for each PTRS port. {p00, p01, p10, p11} may be set by Ptrs-Power.

[0155] [PTRS Transmission Operation #1-2] When an upper layer parameter related to the multi-panel scheme (e.g., multipanelScheme) is set to the spatial multiplexing scheme (SDMScheme), two SRS resource sets are configured in the SRS resource set list (e.g., srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2), and a specific code point is indicated by the SRS resource set indicator, the number of PUSH layers / coherent type may be associated with the same SRS resource set as the PUSH layer / DMRS port with which the PTRS port is associated.

[0156] Qp may be the number of PTRS ports associated with two SRS resource sets, e.g., Qp=2 if the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 2, and Qp=1 if the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 1.

[0157] Alternatively, Qp may be the number of PTRS ports associated with one SRS resource set, e.g., Qp=1.

[0158] The specific code point of the SRS resource set indicator field may be, for example, "10." When the SRS resource set indicator field indicates a specific code point (for example, "10"), this may mean that application of SDM in multi-panel transmission (STxMP) is indicated (for example, separate MIMO layer transmission is performed in multiple beams using both of two SRS resource sets).

[0159] If the SRS resource set identifier field indicates a code point other than a specific code point (e.g., "00" / "01"), this may mean that single-panel transmission using only one SRS resource set (or one SRS resource set) is indicated. Also, code points other than the specific code point (e.g., "11") may be configured not to be applied (reserved) in the SDM of STxMP.

[0160] 14 is a diagram illustrating an example of an SRS resource set indicator. Of course, the SRS resource set indicator is not limited to this. A specific code point ("10") in the SRS resource set indicator field indicates that the SRS resource indicator field and the precoding information and layer number field are associated with a first SRS resource set, and the second SRS resource indicator field and the second precoding information field are associated with a second SRS resource set.

[0161] A UE that applies / configures / supports the SDM scheme of STxMP may control PTRS transmission (or the PUSCH-to-PTRS power ratio) using PTRS transmission operation #1-2. In this case, the UE may determine the number of PUSCH layers / coherence type based on at least one (or all) of higher layer parameters related to the multi-panel scheme, the number of configured SRS resource sets, and the content / codepoint indicated by the SRS resource set identifier (or SRS resource set identifier field) and control PTRS transmission (e.g., PTRS power control based on the tables / associations in Figures 13A and 13B) (see Figure 15).

[0162] For example, in single DCI-based STxMP, when the SDM scheme is configured, two SRS resource sets #1 and #2 are configured, and the SRS resource set identifier field indicates a specific code point "10," the UE may determine the PUSCH-to-PTRS power ratio according to the table (association) in Figure 13A based on the number of PUSCH layers / coherence type associated with the same SRS resource set as the PUSCH layer / DMRS port associated with the PTRS port. For example, in Figure 15, when at least one PTRS port is associated with PUSCH #1, the UE may determine the PUSCH-to-PTRS power ratio based on the number of PUSCH layers / coherence type (e.g., the number of layers / coherence type of PUSCH #1) corresponding to the SRS resource set #1 associated with PUSCH #1.

[0163] This makes it possible to appropriately determine the transmission power of the PTRS (e.g., the PTRS to PUSH power ratio) by taking into account the number of PUSH layers / coherent type per SRS resource set (or per panel) when transmitting PUSH and PTRS using the STxMP SDM method (e.g., two SRS resource sets).

[0164] A UE that applies / configures / supports the SFN scheme of STxMP may control the transmission of PTRS (or the PUSCH to PTRS power ratio) using PTRS transmission operation #1-1. Of course, this is not limited to this.

[0165] The first embodiment (e.g., PTRS transmission operation #1-1 / #1-2) may be applied in either the case where the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 1, the case where the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 2, or both cases.

[0166] Second Embodiment The second embodiment relates to another example of PTRS transmission procedure / transmission control when the SDM / SFN scheme (e.g., PUSCH+PUSCH) of STxMP is supported. The second embodiment is preferably applied to a case where PTRS power control (e.g., PTRS power boost) per panel (or per SRS resource set) is not supported, but is not limited to this.

[0167] [Analysis] Cases where per-panel PTRS power control (e.g., PTRS power boost) is not supported are also assumed. If per-panel PTRS power boost is not supported, using the rules of existing systems (e.g., Rel. 17 and earlier), the number of layers and coherence type of the scheduled PUSCH are assumed to span two panels (see FIG. 16). In such cases, it may be necessary to clarify the interpretation of the coherence type.

[0168] For example, if a case is assumed in which a coherent type of precoding associated with each panel (or each SRS resource set) is set, how to handle the coherent type in determining the PUSCH to PTRS power ratio becomes an issue.

[0169] For example, when the precoders specified for two panels (or SRS resource sets) are fully coherent, there may be cases where it is better not to assume full coherence for determining the PUSCH-to-PTRS power ratio. For example, when the precoders of the two panels are fully coherent, they may be assumed to be partially coherent, and in other cases, they may be assumed to be noncoherent.

[0170] Alternatively, if different coherence type settings are supported for the two panels (or SRS resource sets), handling of the coherence type in determining the PUSCH to PTRS power ratio becomes an issue.

[0171] The following describes PTRS power control (e.g., determining the PUSCH to PTRS power ratio) when per panel PTRS power boosting is not supported.

[0172] The UE is scheduled with Qp={1, 2} PTRS ports in the UL for PTRS transmission, and the number of scheduled layers is n layer PUSCH If so, at least one of the following PTRS transmission operation #2-1 and PTRS transmission operation #2-2 may be applied.

[0173] [PTRS Transmission Operation #2-1] The PTRS transmission operation #2-1 may be the same as the PTRS transmission operation #1-1 shown in the first embodiment.

[0174] [PTRS Transmission Operation #2-2] When a higher layer parameter related to a multi-panel scheme (e.g., multipanelScheme) is set to the spatial multiplexing scheme (SDMScheme), two SRS resource sets are configured in the SRS resource set list (e.g., srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2), and a specific code point is indicated by the SRS resource set indicator, the number of PUSCH layers may be associated with the two SRS resource sets. In other words, the UE may determine the number of PUSCH layers associated with the two SRS resource sets and use this information to determine the PUSCH-to-PTRS power ratio.

[0175] Qp may be the number of PTRS ports associated with two SRS resource sets, e.g., Qp=2 if the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 2, and Qp=1 if the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 1.

[0176] Alternatively, Qp may be the number of PTRS ports associated with one SRS resource set, e.g., Qp=1.

[0177] A specific code point of the SRS resource set indicator field may be, for example, “10.” The content shown in the PTRS transmission operation #1-2 shown in the first embodiment may be applied to the code point of the SRS resource set indicator field.

[0178] For the coherence type, if the higher layer parameter related to PTRS power (ptrs-Power) is set to "00" (or if the UE assumes that ptrs-Power is set to "00"), the following may be assumed: If the precoders associated with two (or both) SRS resource sets are fully coherent, partial coherence may be assumed for determining the PUSCH-to-PTRS power ratio according to the table (association) of Figure 13A. Otherwise (e.g., if at least one precoder associated with one (or both) SRS resource sets is partially coherent or non-coherent), non-coherence may be assumed for determining the PUSCH-to-PTRS power ratio according to the table (association) of Figure 13A.

[0179] The second embodiment (e.g., PTRS transmission operation #2-1 / #2-2) may be applied in either the case where the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 1, the case where the maximum number of ports for SDM (maxNrofPortsforSDM) is set to 2, or both cases.

[0180] [Variation 1] In the PTRS transmission operation #2-2, a case has been described in which partial coherence is assumed for determining the PUSCH-to-PTRS power ratio when the precoders (e.g., multiple precoders) associated with two (or both) SRS resource sets are fully coherent, but this is not limiting. At least one of the following options 2-1 to 2-9 may be applied as the relationship between the precoder types of the precoders (e.g., multiple precoders) associated with two (or both) SRS resource sets and the precoder types assumed for determining the PUSCH-to-PTRS power ratio.

[0181] <<Option 2-1>> When the precoders associated with two (or both) SRS resource sets are fully coherent, at least one of the following options 2-1-1 to 2-1-3 may be applied.

[0182] Option 2-1-1 Full coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0183] Option 2-1-2: Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0184] Option 2-1-3 Depending on higher layer parameters / UE capabilities, full coherence or partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in Figure 13A.

[0185] <<Option 2-2>> When the precoders associated with two (or both) SRS resource sets are partially coherent, at least one of the following options 2-2-1 to 2-2-3 may be applied.

[0186] Option 2-2-1 Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0187] Option 2-2-2 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0188] Option 2-2-3: Partial coherence or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0189] <Option 2-3> If the precoders associated with two (or both) SRS resource sets are non-coherent, non-coherence may be assumed for determining the PUSCH to PTRS power ratio according to the table (association) of Figure 13A.

[0190] <<Option 2-4>> When a precoder associated with one (or only one) of two SRS resource sets is fully coherent and a precoder associated with the other SRS resource set is partially coherent, at least one of the following options 2-4-1 to 2-4-4 may be applied.

[0191] Option 2-4-1 Full coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0192] Option 2-4-2: Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0193] Option 2-4-3 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0194] Option 2-4-4: Full coherence, partial coherence, or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0195] <<Option 2-5>> When a precoder associated with one (or only one) of two SRS resource sets is fully coherent and a precoder associated with the other SRS resource set is non-coherent, at least one of the following options 2-5-1 to 2-5-4 may be applied.

[0196] Option 2-5-1 Full coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0197] Option 2-5-2 Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0198] Option 2-5-3 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0199] Option 2-5-4: Full coherence, partial coherence, or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0200] <<Option 2-6>> When a precoder associated with one (or both) of two SRS resource sets is partially coherent and a precoder associated with the other SRS resource set is non-coherent, at least one of the following options 2-5-1 to 2-5-4 may be applied.

[0201] Option 2-6-1 Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0202] Option 2-6-2 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0203] Option 2-6-3: Partial coherence or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0204] <<Option 2-7>> When the precoder associated with at least one of the SRS resource sets is fully coherent, at least one of the following options 2-7-1 to 2-7-4 may be applied.

[0205] Option 2-7-1 Full coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0206] Option 2-7-2 Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0207] Option 2-7-3 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in Figure 13A.

[0208] Option 2-7-4: Full coherence, partial coherence, or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0209] <<Option 2-8>> When a precoder associated with at least one of the SRS resource sets is partially coherent, at least one of the following options 2-8-1 to 2-8-3 may be applied.

[0210] Option 2-8-1 Partial coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0211] Option 2-8-2 Non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0212] Option 2-8-3: Partial coherence or non-coherence may be assumed to determine the PUSCH to PTRS power ratio according to the table (association) in FIG. 13A.

[0213] <<Option 2-9>> If the precoder associated with at least one of the SRS resource sets is non-coherent, non-coherence may be assumed for determining the PUSCH to PTRS power ratio according to the table (association) of FIG. 13A.

[0214] [Variation 2] In PTRS transmission operation #2-2, the case where the higher layer parameter related to PTRS power (ptrs-Power) is set to "00" has been described, but this is not limiting. The case where the higher layer parameter related to PTRS power (ptrs-Power) is set to "01" may also be assumed (or the UE may assume that ptrs-Power is set to "01").

[0215] When an upper layer parameter related to a multi-panel scheme (e.g., multipanelScheme) is set to the spatial multiplexing scheme (SDMScheme) and two SRS resource sets are configured in the SRS resource set list (e.g., srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2), the UE may assume that ptrs-Power is set to "01". Furthermore, when a specific code point is indicated by the SRS resource set indicator, the number of PUSCH layers may be associated with two SRS resource sets.

[0216] A specific code point of the SRS resource set indicator field may be, for example, “10.” The content shown in the PTRS transmission operation #1-2 shown in the first embodiment may be applied to the code point of the SRS resource set indicator field.

[0217] The UE may determine the number of PUSCH layers associated with the two SRS resource sets and use this information to determine the PUSCH-to-PTRS power ratio. In this way, assuming that ptrs-Power is set to "01", the value of the PUSCH-to-PTRS power ratio can be configured to be independent of the coherence type.

[0218] In the above description, the case where the table (association) of Fig. 13A is used to determine the PUSCH to PTRS power ratio in STxMP PUSCH transmission (for example, SDM / SFN-based PUSCH + PUSCH) has been shown, but applicable tables (association) are not limited to this. The values / parameters etc. of the table (association) of Fig. 13A may be appropriately changed and applied.

[0219] <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.

[0220] 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.

[0221] 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.

[0222] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0223] [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.

[0224] 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.

[0225] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0226] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0227] [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.

[0228] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0229] The specific UE capability may indicate at least one of the following: - Supporting specific processing / operation / control / information (e.g., STxMP) for at least one of the above embodiments; - Supporting STxMP PUSCH+PUSCH; - Supporting STxMP SDM; - Supporting per-panel (or per-SRS resource set) PTRS power control (e.g., PTRS power boost).

[0230] 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).

[0231] 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)).

[0232] At least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiment (or performs the operations of the above-described embodiment) through higher layer signaling / physical layer signaling. For example, the specific information may be information indicating that dynamic switching between STxMP modes / transmission modes is enabled, any RRC parameter for a specific release (e.g., Rel. 18 / 19), etc.

[0233] 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, the behavior of Rel. 15 / 16 / 17.

[0234] (Supplementary Note) The following invention is supplementary to one embodiment of the present disclosure: [Supplementary Note 1] A terminal including: a receiver that receives at least one of first information related to a multi-panel scheme, second information related to configuration of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field, and a controller that, when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS), determines at least one of the number of layers and a coherence type of the uplink shared channel to be used for a power ratio of the uplink shared channel to the PTRS, based on at least one of the first information, the second information, and the downlink control information. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein, when a spatial division multiplexing scheme is configured by the first information, two SRS resource sets are configured by the second information, and the downlink control information instructs multi-panel transmission using the two SRS resource sets, at least one of a number of layers of the uplink shared channel used for the power ratio of the uplink shared channel to a PTRS and a coherent type is associated with the same SRS resource set as a PUSCH layer and a DMRS port to which a port of the PTRS is associated. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein, when a spatial division multiplexing scheme is configured by the first information, two SRS resource sets are configured by the second information, and the downlink control information instructs multi-panel transmission using the two SRS resource sets, the number of layers of the uplink shared channel used for the power ratio of the uplink shared channel to a PTRS is associated with the two SRS resource sets, and the coherent type is determined based on precoders associated with the two SRS resource sets. [Supplementary Note 4] The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein, when a spatial division multiplexing scheme is set by the first information, two SRS resource sets are set by the second information, the downlink control information instructs multi-panel transmission using the two SRS resource sets, and precoders associated with the two SRS resource sets are fully coherent, the controller determines a power ratio of the uplink shared channel to a PTRS assuming partial coherence.

[0235] (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.

[0236] 17 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).

[0237] 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.

[0238] 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.

[0239] 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))).

[0240] 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.

[0241] 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).

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0248] 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).

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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).

[0253] 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.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] 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).

[0262] (Base Station) Fig. 18 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] The transceiver 120 may transmit at least one of first information regarding a multi-panel method, second information regarding the configuration of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field to the terminal.

[0280] When instructing a terminal to transmit an uplink shared channel accompanied by a phase tracking reference signal (PTRS), the control unit 110 may instruct at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS, based on at least one of the first information, the second information, and the downlink control information.

[0281] (User Terminal) Fig. 19 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 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0298] 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.

[0299] The transceiver 220 may receive at least one of first information regarding a multi-panel scheme, second information regarding the configuration of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field.

[0300] When transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS), the control unit 210 may determine at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS, based on at least one of the first information, the second information, and the downlink control information.

[0301] When the first information configures a spatial division multiplexing scheme, the second information configures two SRS resource sets, and the downlink control information instructs multi-panel transmission using the two SRS resource sets, at least one of the number of layers and coherence type of the uplink shared channel used for the power ratio of the uplink shared channel to the PTRS may be associated with the same SRS resource set as the PUSH layer and DMRS port to which the port of the PTRS is associated.

[0302] When the first information configures a spatial division multiplexing scheme, the second information configures two SRS resource sets, and the downlink control information instructs multi-panel transmission using the two SRS resource sets, the number of layers of the uplink shared channel used for the power ratio of the uplink shared channel to the PTRS may be associated with the two SRS resource sets, and the coherence type may be determined based on the coherence type of the precoder associated with the two SRS resource sets.

[0303] When the first information sets a spatial division multiplexing scheme, the second information sets two SRS resource sets, the downlink control information instructs multi-panel transmission using the two SRS resource sets, and the precoders associated with the two SRS resource sets are fully coherent, the control unit 210 may determine the power ratio of the uplink shared channel to the PTRS assuming partial coherence.

[0304] (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.

[0305] 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.

[0306] 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. 20 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.

[0307] 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.

[0308] 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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).

[0316] 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.

[0317] 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.

[0318] (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.

[0319] 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.

[0320] 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.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] 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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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.

[0336] 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."

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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.

[0341] 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.

[0342] 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.

[0343] 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.

[0344] 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).

[0345] 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).

[0346] 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).

[0347] 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.

[0348] 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.

[0349] 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).

[0350] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0351] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0352] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0353] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0354] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0355] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0356] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0357] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0358] 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.

[0359] 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.

[0360] 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.

[0361] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0362] 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.

[0363] 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.

[0364] 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.

[0365] 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.

[0366] 21 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.

[0367] 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.

[0368] 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).

[0369] 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.

[0370] 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.

[0371] 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.

[0372] 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.

[0373] 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.

[0374] 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).

[0375] 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.

[0376] 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)).

[0377] 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.

[0378] 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.

[0379] 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.

[0380] 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.

[0381] 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.

[0382] 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).

[0383] 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."

[0384] 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.

[0385] 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.

[0386] 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.

[0387] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0388] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0389] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0390] 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.

[0391] 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."

[0392] 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.

[0393] 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."

[0394] 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.

[0395] 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.

[0396] 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").

[0397] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0398] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0399] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0400] 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 description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A terminal having a receiving unit that receives at least one of first information regarding a multi-panel method, second information regarding the setting of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field; and a control unit that, when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS), determines at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS based on at least one of the first information, the second information, and the downlink control information.

2. The terminal of claim 1, wherein, when a spatial division multiplexing scheme is set by the first information, two SRS resource sets are set by the second information, and multi-panel transmission using the two SRS resource sets is instructed by the downlink control information, at least one of the number of layers and the coherent type of the uplink shared channel used for the power ratio of the uplink shared channel to the PTRS is associated with the same SRS resource set as the PUSH layer and DMRS port to which the PTRS port is associated.

3. The terminal according to claim 1, wherein, when a spatial division multiplexing scheme is set by the first information, two SRS resource sets are set by the second information, and multi-panel transmission using the two SRS resource sets is instructed by the downlink control information, the number of layers of the uplink shared channel used for the power ratio of the uplink shared channel to a PTRS is associated with the two SRS resource sets, and the coherence type is determined based on a coherence type of a precoder associated with the two SRS resource sets.

4. The terminal of claim 1, wherein when a spatial division multiplexing scheme is set by the first information, two SRS resource sets are set by the second information, multi-panel transmission using the two SRS resource sets is instructed by the downlink control information, and precoders associated with the two SRS resource sets are fully coherent, the control unit determines a power ratio of the uplink shared channel to the PTRS assuming partial coherence.

5. A wireless communication method for a terminal, comprising: a step of receiving at least one of first information regarding a multi-panel method, second information regarding a setting of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field; and a step of determining, when transmitting an uplink shared channel accompanied by a phase tracking reference signal (PTRS), at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS, based on at least one of the first information, the second information, and the downlink control information.

6. A base station having a transmitter that transmits at least one of first information regarding a multi-panel method, second information regarding the setting of a sounding reference signal (SRS) resource set, and downlink control information including an SRS resource set identifier field to a terminal, and a control unit that, when instructing the terminal to transmit an uplink shared channel accompanied by a phase tracking reference signal (PTRS), instructs at least one of the number of layers and the coherence type of the uplink shared channel to be used for the power ratio of the uplink shared channel to the PTRS based on at least one of the first information, the second information, and the downlink control information.

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