Terminal, wireless communication method, and base station

Abstract

This terminal according to one aspect of the present disclosure comprises: a reception unit that receives a configuration of uplink transmission that uses all eight antenna ports; and a control unit that determines a precoding matrix on the basis of at least one of a first association between a precoding matrix for four-layer transmission using all of the eight antenna ports and a transmitted precoding matrix indicator (TPMI) index, and a second association between the TPMI index corresponding to the four-layer transmission using all of the eight antenna ports and the value of a field in 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] Rel. 15 NR supports uplink (UL) multi-input multi-output (MIMO) transmission with up to four layers. For future NRs, support for UL transmission with a number of layers greater than four is being considered to achieve higher spectral efficiency. For example, for Rel. 18 NR, maximum 6-rank transmission using 6 antenna ports and maximum 6- or 8-rank transmission using 8 antenna ports are being considered.

[0006] However, UL full power transmission using more than four antenna ports (a number of antenna ports greater than four) has not yet been studied. Unless an appropriate method for controlling full power transmission is specified, there is a risk that an increase in communication throughput will be suppressed.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control UL full power transmission using more than four antenna ports.

[0008] A terminal according to one aspect of the present disclosure includes a receiving unit that receives a configuration for uplink transmission using all eight antenna ports, and a control unit that determines a precoding matrix based on at least one of a first association between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

[0009] According to one aspect of the present disclosure, UL full power transmission using more than four antenna ports can be appropriately controlled.

[0010] Figure 1 is a diagram showing an example of a table of precoding matrices W for single-layer (rank 1) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 2 is a diagram showing an example of a table of precoding matrices W for two-layer (rank 2) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 3 is a diagram showing an example of a table of precoding matrices W for three-layer (rank 3) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 4 is a diagram showing an example of a table of precoding matrices W for four-layer (rank 4) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 5 is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 related to full power transmission. Figures 6A and 6B are diagrams showing an example of a TPMI group. FIG. 7 is a diagram showing an example of the correspondence between field values ​​of precoding information and number of layers, the number of layers, and TPMI. FIG. 8 is a diagram showing another example of the correspondence between field values ​​of precoding information and number of layers, the number of layers, and TPMI. FIG. 9 is a diagram showing another example of the correspondence between field values ​​of precoding information and number of layers, the number of layers, and TPMI. FIG. 10 is a diagram showing an example of an antenna layout for 8 antenna ports. FIGS. 11A to 11C are diagrams showing examples of precoders associated with antenna groups. FIG. 12 shows an example of a port mapping function. FIG. 13 shows an example of TPMI table P-9. FIG. 14 shows an example of TPMI table P-17. FIG. 15 shows an example of TPMI table P-29. FIG. 16 shows an example of TPMI table P-39. FIG. 17 shows an example of TPMI table P-47. FIG. 18 shows an example of TRI / TPMI indication table D-5M. Figure 19 shows an example of a TPMI table P-30. Figure 20 shows another example of a TRI / TPMI instruction table D-5M. Figure 21 shows an example of a TRI / TPMI instruction table D-5N. Figure 22 shows an example of a TRI / TPMI instruction table D-5O.FIG. 23 shows an example of TRI / TPMI instruction table D-5P. FIG. 24 shows an example of TPMI table P-40. FIG. 25 shows an example of TPMI table P-41. FIG. 26 shows another example of TPMI table P-47. FIG. 27 shows another example of TPMI table P-29. FIG. 28 shows another example of TPMI table P-39. FIG. 29 shows another example of TPMI table P-40. FIG. 30 shows another example of TPMI table P-41. FIG. 31 shows another example of TRI / TPMI instruction table D-5P. FIG. 32 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 33 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 34 is a diagram showing an example of a configuration of a user terminal according to an embodiment. FIG. 35 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. FIG. 36 is a diagram showing an example of a vehicle according to an embodiment.

[0011] (Control of Transmission of SRS and PUSCH) In Rel. 15 NR, a terminal (user terminal, User Equipment (UE)) may receive information (SRS configuration information, for example, parameters in the RRC control element "SRS-Config") used for transmitting a measurement reference signal (for example, a sounding reference signal (SRS)).

[0012] 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").

[0013] 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).

[0014] 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.

[0015] Here, the SRS resource type may indicate any one of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic CSI (Aperiodic SRS (A-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.

[0016] Furthermore, the use ("usage" of the RRC parameter, "SRS-SetUse" of the L1 (Layer-1) parameter) may be, for example, beam management, codebook (CB), non-codebook (NCB), antenna switching, etc. The SRS for codebook or non-codebook use may be used to determine a precoder for codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) transmission based on the SRI.

[0017] For example, in the case of codebook-based transmission, the UE may determine a precoder (precoding matrix) for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and a Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI.

[0018] 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.

[0019] 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).

[0020] 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.

[0021] In the present disclosure, the SSB index, SSB resource ID, and SSB Resource Indicator (SSBRI) may be interchangeable. Furthermore, the CSI-RS index, CSI-RS resource ID, and CSI-RS Resource Indicator (CRI) may be interchangeable. Furthermore, the SRS index, SRS resource ID, and SRI may be interchangeable.

[0022] 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.

[0023] When the UE is configured with spatial relationship information regarding the SRS and an SSB or CSI-RS for a certain SRS resource, 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.

[0024] When the UE is configured with spatial relationship information between another SRS (reference SRS) and the target SRS for a certain SRS (target SRS), the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain transmit filter) for transmitting the reference SRS. That is, in this case, the UE may assume that the UE transmit beam of the reference SRS and the UE transmit beam of the target SRS are the same.

[0025] 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.

[0026] In Rel. 15 / 16 NR, when codebook-based transmission is used for PUSCH, the UE is configured by RRC with an SRS resource set of a codebook usage having up to two SRS resources, and one of the up to two SRS resources may be indicated by DCI (a 1-bit SRI field). The transmission beam for PUSCH is specified by the SRI field.

[0027] The UE may determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information and layer number field (also referred to as the precoding information field for simplicity).The UE may select a precoder from an uplink codebook for the same number of SRS ports as the number of SRS ports indicated by "nrofSRS-Ports" of the upper layer parameters configured for the SRS resource specified by the SRI field based on the TPMI, the number of layers, etc.

[0028] In Rel. 15 / 16 NR, when non-codebook-based transmission is used for PUSCH, a non-codebook-used SRS resource set having up to four SRS resources may be configured for the UE by RRC, and one or more of the up to four SRS resources may be indicated by DCI (a 2-bit SRI field).

[0029] The UE may determine the number of layers (transmission rank) for the PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers for the PUSCH. The UE may also calculate a precoder for the SRS resources.

[0030] If a CSI-RS (which may be referred to as an associated CSI-RS) associated with the SRS resource (or an SRS resource set to which the SRS resource belongs) is configured by a higher layer, the transmission beam for the PUSCH may be calculated based on (measurements of) the configured associated CSI-RS. Otherwise, the transmission beam for the PUSCH may be specified by the SRI.

[0031] The UE may be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission by a higher layer parameter "txConfig" indicating a transmission scheme. The parameter may indicate a value of "codebook" or "non-codebook."

[0032] In the present disclosure, a codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may refer to a PUSCH when a UE is configured with "codebook" as a transmission scheme. In the present disclosure, a non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may refer to a PUSCH when a UE is configured with "non-codebook" as a transmission scheme.

[0033] (Determining a PUSCH Precoder in Codebook (CB)-Based Transmission) As described above, in the case of codebook (CB)-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI, TRI, TPMI, and the like.

[0034] The SRI, TRI, TPMI, etc. may be notified to the UE using Downlink Control Information (DCI). The SRI may be specified by an SRS Resource Indicator field (SRI field) of the DCI, or may be specified by a parameter "srs-ResourceIndicator" included in an RRC information element "ConfiguredGrantConfig" of a configured grant PUSCH.

[0035] The TRI and TPMI may be specified by the "Precoding information and number of layers" field of the DCI.

[0036] 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 (for example, may be represented by the RRC parameter "pusch-TransCoherence").

[0037] The UE may determine the precoder to be used for PUSCH transmission based on precoder type information (e.g., the RRC parameter "codebookSubset") included in PUSCH configuration information notified by higher layer signaling (e.g., the "PUSCH-Config" information element of RRC signaling). The UE may be configured with a subset of the PMI specified by the TPMI by the codebookSubset.

[0038] 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").

[0039] For example, the RRC parameter "pusch-TransCoherence" indicating UE capability may indicate full coherence, partial coherence, or noncoherence, and the RRC parameter "codebookSubset" may indicate "fully and partial and noncoherence," "partial and noncoherence," or "noncoherent."

[0040] Fully coherent (hereinafter also abbreviated as FC) 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 (hereinafter also abbreviated as PC) may mean that some of the antenna ports used for transmission are synchronized, but these some ports cannot be synchronized with other ports. Non-coherent (hereinafter also abbreviated as NC) may mean that each antenna port used for transmission cannot be synchronized.

[0041] 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.

[0042] In the present disclosure, non-coherent UE, partially coherent UE, and fully coherent UE may be interchangeably read as a UE having non-coherent capabilities, a UE having partial coherent capabilities, and a UE having fully coherent capabilities, respectively.

[0043] In addition, non-coherent UE, partially coherent UE, and fully coherent UE may be interchangeably read as UEs with codebook subsets of "non-coherent," "partial and non-coherent," and "fully and partial and non-coherent" configured at a higher layer, respectively.

[0044] A non-coherent UE, a partially coherent UE, and a fully coherent UE may be interchangeably read as a UE that can transmit using a non-coherent codebook, a partially coherent codebook, and a fully coherent codebook, respectively.

[0045] In the present disclosure, precoder type, coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc. may be read interchangeably.

[0046] 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.

[0047] Figures 1-4 are diagrams showing examples of associations between codebook subsets and TPMI indexes. Figure 1 corresponds to a table of precoding matrices W for single-layer (rank-1) transmission using four antenna ports when transform precoding (also called a transform precoder) is disabled in Rel. 16 NR. Figure 1 shows the corresponding Ws in ascending order of TPMI index from left to right (similarly shown in Figures 2-4).

[0048] The correspondence relationship (which may be called a table) showing the TPMI index and the corresponding W as shown in Figures 1 to 4 is also called a codebook. A part of this codebook is also called a codebook subset.

[0049] In Fig. 1, if the codebook subset is fully, partially, and non-coherent, the UE is notified of a TPMI of 0 to 27 for single-layer transmission. If the codebook subset is partial and non-coherent, the UE is configured with a TPMI of 0 to 11 for single-layer transmission. If the codebook subset is non-coherent, the UE is configured with a TPMI of 0 to 3 for single-layer transmission.

[0050] 2 to 4 correspond to tables of precoding matrices W for 2-4 layer (rank 2-4) transmission using 4 antenna ports in Rel. 16 NR when transform precoding is disabled.

[0051] According to Figure 2, the TPMIs that the UE is informed of for two-layer transmission are 0 to 21 (codebook subsets full, partial and non-coherent), 0 to 13 (precoder type partial and non-coherent) or 0 to 5 (precoder type non-coherent).

[0052] According to Figure 3, the TPMI that the UE is informed of for three-layer transmission is 0 to 6 (codebook subset full, partial and non-coherent), 0 to 2 (precoder type partial and non-coherent) or 0 (precoder type non-coherent).

[0053] According to Figure 4, the TPMI that the UE is informed of for 4-layer transmission is 0 to 4 (codebook subset full, partial and non-coherent), 0 to 2 (precoder type partial and non-coherent) or 0 (precoder type non-coherent).

[0054] Note that a precoding matrix in which only one element per column is non-zero may be called a non-coherent codebook. A precoding matrix in which a certain number of elements per column (greater than one, but not all elements in the column) are non-zero may be called a partially coherent codebook. A precoding matrix in which all elements per column are non-zero may be called a fully coherent codebook.

[0055] The non-coherent codebook and the partially coherent codebook may be called an antenna selection precoder, an antenna port selection precoder, etc. For example, the non-coherent codebook (non-coherent precoder) may be called a 1-port selection precoder, a 1-port port selection precoder, etc. Furthermore, the partially coherent codebook (partially coherent precoder) may be called an x-port (x is an integer greater than 1) selection precoder, an x-port port selection precoder, etc. The fully coherent codebook may be called a non-antenna selection precoder, an all-port precoder, etc.

[0056] 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).

[0057] 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).

[0058] (Full-power UL Transmission) According to the Rel. 15 NR specifications, the transmission power of the PUSCH is allocated equally to each antenna port. When a UE performs codebook-based transmission using multiple ports, if a part of the codebook (specifically, a partially coherent / noncoherent codebook) is used, the transmission power may be smaller (full-power transmission may not be possible) than in the case of a single port.

[0059] For example, in the table of FIG. 1, the transmission power of the fully coherent codebook corresponding to indexes 12 to 27 is set to 1 (=(1 / 2)２ *4), the transmission power of the partially coherent codebook corresponding to indexes 4 to 11 is 1 / 2 (=(1 / 2) ２ *2), and the transmission power of the non-coherent codebook corresponding to indexes 0 to 3 is 1 / 4 (=(1 / 2) ２ *1).

[0060] Even when a codebook is used, it is preferable to appropriately perform full-power UL transmission. Rel. 16 NR specifies the following UE Capabilities 1-3 related to codebook-based full-power UL transmission using multiple power amplifiers (PAs): UE Capability 1: Supports (or has) a PA capable of outputting the maximum rated power (fully rated PA) in each Tx chain; UE Capability 2: None of the Tx chains supports fully rated PA; UE Capability 3: A subset (part) of the Tx chains supports fully rated PA.

[0061] Note that a UE having at least one of the UE capabilities 1-3 may mean that it supports full power UL transmission. The UE may report capability information indicating that it supports UL full power transmission capability to a network (NW) (e.g., a base station) separately from the UE capabilities 1-3. The UE may be configured by the network to support full power transmission.

[0062] 5 is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 related to full power transmission. Fig. 5 simply shows only PAs and transmit antenna ports (which may be read as transmit antennas) as the UE configuration. Note that an example is shown in which the number of PAs and transmit antenna ports is four, but this is not limiting.

[0063] Note that P denotes the UE maximum output power [dBm], and P ＰＡ indicates the PA maximum output power [dBm]. Note that P may be, for example, 23 dBm for a UE of power class 3 and 26 dBm for a UE of power class 2. In the present disclosure, P ＰＡAssume that P≦P, but P ＰＡ >P, embodiments of the present disclosure may be applied.

[0064] The UE capability 1 configuration is expected to be expensive to implement, but allows full-power transmission using any one or more antenna ports. Note that UE capability 1 may also indicate the ability to support Mode 0.

[0065] The configuration of UE capability 2 includes only a non-fully-rated PA and is expected to be inexpensive to implement, but since full power transmission is not possible using only one antenna port, it is necessary to control the phase, amplitude, etc. of the signal input to each PA.

[0066] The UE capability 3 configuration is intermediate between the UE capability 1 configuration and the UE capability 2 configuration. It contains a mixture of antenna ports capable of full power transmission (transmit antennas #0 and #2 in this example) and antenna ports that cannot (transmit antennas #1 and #3 in this example).

[0067] Note that the indexes and number of antenna ports capable of full power transmission in UE capability 3 are not limited to those shown above. ＰＡ = P / 2, but P ＰＡ The value of is not limited to this.

[0068] Incidentally, it is contemplated that a UE supporting UE capability 2 or 3 will be configured with at least one of two modes (modes 1 and 2) for full power transmission operation.

[0069] Here, Mode 1 may be a mode (e.g., referred to as a first full-power transmission mode) in which the UE is configured such that one or more SRS resources included in one SRS resource set of usage in a "codebook" have the same number of SRS ports. A UE operating in Mode 1 may transmit at full power using all antenna ports (with no antenna selection precoder).

[0070] A UE operating in Mode 1 may be configured by the network to use a subset of TPMIs that combine ports within one layer to achieve full power transmission. A new codebook subset may be introduced only for rank values ​​that cannot be used for full power transmission, including precoders for TPMIs corresponding to "fullyAndPartialAndNonCoherent" as defined in Rel. 15 NR.

[0071] On the other hand, Mode 2 may be a mode (e.g., referred to as a second full power transmission mode) in which the UE is configured so that one or more SRS resources included in one SRS resource set of usage "codebook" have different numbers of SRS ports. A UE operating in Mode 2 may transmit at full power using some antenna ports rather than all antenna ports.

[0072] A UE operating in Mode 2 may transmit PUSCH and SRS in the same manner regardless of whether antenna virtualization is used. A Mode 2 UE may be notified of a set of TPMIs for full power transmission to support SRS resources for more than one port. For Mode 2, two or three SRS resources may be configured per SRS resource set (maximum of two in Rel. 15 NR).

[0073] Mode 1 has the advantage over Mode 2 that the required size of the SRI field is smaller (full power transmission is possible with one SRS resource).

[0074] Mode 2 has an advantage over Mode 1 in that it can dynamically switch between single-port transmission and multi-port transmission using DCI. In addition, since full-power transmission is possible on some antenna ports, full-power transmission can be performed using only antennas with fully rated PA, or only coherent antennas can be used for full-power transmission.

[0075] The above modes 0, 1, and 2 may be respectively referred to as full power modes 0, 1, and 2. Full power mode 0 may also be simply referred to as full power.

[0076] In Rel. 16 NR, a UE may report one or more of the following UE capability information indicating support of Mode 0 (ul-FullPwrMode-r16), UE capability information indicating support of Mode 1 (ul-FullPwrMode1-r16), and UE capability information indicating support of Mode 2 (ul-FullPwrMode2-MaxSRS-ResInSet-r16, ul-FullPwrMode2-SRSConfig-diffNumSRSPorts-r16, etc.).

[0077] It is also being considered that the UE may report UE capability information (ul-FullPwrMode2-TPMIGroup-r16, which may also be called TPMI group capability information) regarding a TPMI set (which may also be called a TPMI group) that is capable of full power transmission in relation to mode 2.

[0078] 6A and 6B are diagrams illustrating an example of a TPMI group. Fig. 6A illustrates a PA configuration and a precoding matrix (precoder) for each rank corresponding to the TPMI group when the number of transmit antenna ports is four. If there are multiple precoders capable of full-power transmission for the same rank, full-power transmission is possible for any of the multiple precoders for that rank. The number of columns in each matrix may represent the number of layers.

[0079] Figure 6B shows an example of TPMI groups assumed for a UE with four transmit antenna ports. A non-coherent UE with four transmit antenna ports can correspond to any of G0-G3. A partially coherent UE with four transmit antenna ports can correspond to any of G0-G6.

[0080] The UE may determine the mode to be used for PUSCH transmission based on higher layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination thereof. In other words, the UE may be configured with or instructed to use the PUSCH transmission mode by UL full power transmission mode information (ul-FullPowerTransmission-r16) in higher layer parameters (e.g., PUSCH configuration information (PUSCH-Config information element)).

[0081] If the UL full power transmission mode information configured for a UE indicates fullpower, the UE may perform PUSCH full power transmission according to Mode 0. If the UL full power transmission mode information configured for a UE indicates fullpowerMode1, the UE may perform PUSCH full power transmission according to Mode 1. If the UL full power transmission mode information configured for a UE is fullpowerMode2, the UE may perform PUSCH full power transmission according to Mode 2.

[0082] When the codebook subset included in the PUSCH configuration information is noncoherent or partially coherent (the RRC parameter "codebookSubset" = "nonCoherent" or "partialAndNonCoherent") and the PUSCH configuration information includes a parameter UL full power transmission mode information (ul-FullPowerTransmission-r16) indicating full power transmission, the UE may scale (e.g., multiply or divide) the linear value of the PUSCH transmission power determined based on the path loss, a Transmit Power Control (TPC) command, etc., by a certain coefficient s. This coefficient may be referred to as a power scaling coefficient, a scaling coefficient, etc.

[0083] The UE may scale the linear value of the PUSCH transmit power using the factor s and divide the scaled value evenly across the non-zero PUSCH antenna ports. The UE may apply the determined (or assumed) factor s to a precoding matrix to transmit the PUSCH at full power.

[0084] For example, a UE configured with Mode 1 by the UL full power transmission mode information (also referred to as a Mode 1 UE) may derive s = (number of non-zero PUSCH antenna ports / maximum number of SRS ports supported by the UE in one SRS resource) when each SRS resource in the SRS resource set whose usage is codebook has more than one SRS port.

[0085] Here, a non-zero PUSCH antenna port may refer to an antenna port having non-zero PUSCH transmission power, or may refer to an antenna port having a non-zero value (e.g., 1, j) among the antenna ports for which transmission is indicated by the precoding matrix (codebook subset).

[0086] For example, consider the case where a Mode 1 UE is instructed by DCI to perform 4-port 1-layer transmission as shown in Figure 4. In Rel. 16 NR, if the Mode 1 UE is a non-coherent UE, it may be assigned a TPMI index of 13, in which case it can perform full-power transmission, and if the Mode 1 UE is a partially coherent UE, it may be assigned a TPMI index of 12-15, in which case it can perform full-power transmission.

[0087] A UE configured for Mode 2 by the UL full power transmission mode information (also referred to as a Mode 2 UE) may apply s=1 to the precoder corresponding to the TPMI reported as the TPMI group (which may also be referred to as a full power TPMI). For example, consider the case where a partially coherent Mode 2 UE reporting G4 in Figure 6B is instructed by DCI to perform 4-port 1-layer transmission in Figure 4.

[0088] In this case, if any of TPMI indices 4-7 corresponding to full-power TPMIs for G4 in FIG. 6A is specified by the DCI, a Mode 2 UE applies 1 / sqrt (the number of non-zero PUSCH antenna ports of W) (in this case, 1 / sqrt(2)) as the amplitude value of W (the coefficient part (½) of W) corresponding to TPMI indices 4-7 (in other words, instead of ½). Also, apply s=1 above. This allows the Mode 2 UE to perform full-power transmission for TPMI indices 4-7.

[0089] Furthermore, for precoders corresponding to remaining TPMIs other than the full power TPMI, the Mode 2 UE may derive s = (number of non-zero PUSCH antenna ports / number of SRS ports). Here, the number of SRS ports may correspond to the number of SRS ports associated with the SRS resource if only one SRS resource is configured in the SRS resource set whose use is the codebook, or may correspond to the number of SRS ports of the SRS resource indicated by the SRI if more than one SRS resource is configured in the SRS resource set whose use is the codebook. In the case where a partially coherent Mode 2 UE reporting G4 of FIG. 6B performs the 4-port 1-layer transmission of FIG. 4, non-full power transmission can be performed for TPMI indexes 8-11 (similar to Rel. 15).

[0090] A UE configured for Mode 0 by the UL full power transmission mode information (also referred to as a Mode 0 UE) may apply s=1.

[0091] For example, consider a case where a Mode 0 UE is instructed by DCI to perform 4-port, 1-layer transmission as shown in Figure 4. In Rel. 16 NR, if the Mode 0 UE is instructed by DCI to use either a noncoherent or partially coherent precoder (TPMI index = 0-11), 1 / sqrt (the number of non-zero PUSCH antenna ports in W) (1 for a noncoherent precoder and 1 / sqrt(2) for a partially coherent precoder) is used as the amplitude value of the corresponding W (the coefficient part (1 / 2) of W). Also, s = 1 is used above.

[0092] (Precoding Information Field) As described above, the UE may determine the TPMI and the number of layers (transmission rank) for a PUSCH based on the precoding information field of the DCI (e.g., DCI format 0_1 / 0_2) that schedules the PUSCH.

[0093] For a codebook-based PUSCH, the number of bits of the precoding information field may be determined (or may vary) based on the setting of whether to enable or disable the transform precoder for the PUSCH (e.g., the upper layer parameter transformPrecoder), the setting of the codebook subset for the PUSCH (e.g., the upper layer parameter codebookSubset), the setting of the maximum number of layers for the PUSCH (e.g., the upper layer parameter maxRank), the setting of uplink full power transmission for the PUSCH (e.g., the upper layer parameter ul-FullPowerTransmission), the number of antenna ports for the PUSCH, etc.

[0094] 7 is a diagram showing an example of the correspondence between the field values ​​of the precoding information and the number of layers, and the number of layers and TPMI. Fig. 7 shows the correspondence when maxRank = 2, 3, or 4, and ul-FullPowerTransmission is not set, or ul-FullPowerTransmission is set to fullpowerMode2 / fullpower.

[0095] In FIG. 7, the precoding information field is 6 bits when a fully coherent (fullyAndPartialAndNonCoherent) codebook subset is configured in the UE, 5 bits when a partially coherent (partialAndNonCoherent) codebook subset is configured, and 4 bits when a noncoherent (nonCoherent) codebook subset is configured.

[0096] As shown in Figure 7, the number of layers and TPMI corresponding to a certain precoding information field value may be the same (common) regardless of the codebook subset configured in the UE. For example, in Figure 7, the number of layers and TPMI indicated by values ​​= 0-11 in the precoding information field may be the same for fully coherent (fullyAndPartialAndNonCoherent), partially coherent (partialAndNonCoherent), and noncoherent codebook subsets. Also, in Figure 7, the number of layers and TPMI indicated by values ​​= 0-31 in the precoding information field may be the same for fully coherent (fullyAndPartialAndNonCoherent) and partially coherent (partialAndNonCoherent) codebook subsets.

[0097] The precoding information field may be 0 bits for a non-codebook-based PUSCH, and may be 0 bits for a codebook-based PUSCH with one antenna port.

[0098] 8 is a diagram illustrating another example of the correspondence between the field values ​​of the precoding information and the number of layers, and the number of layers and TPMI. In FIG. 8, the correspondence is shown when maxRank=2 and ul-FullPowerTransmission is set to fullpowerMode1.

[0099] In FIG. 8, the precoding information field is 5 bits when a partial and non-coherent codebook subset is configured in the UE, and is 4 bits when a non-coherent codebook subset is configured in the UE.

[0100] As shown in FIG. 8, similar to FIG. 7, the number of layers and TPMI corresponding to a value of a certain precoding information field may be the same (common) regardless of the codebook subset configured in the UE.

[0101] Also, in the example shown in Figure 8, indexes 10, 20, 21 and 22 in the case of partial coherence (partialAndNonCoherent) and indexes 10 and 11 in the case of non-coherence may be additionally supported as precoders for non / partially coherent UEs selected from coherent precoders.

[0102] 9 is a diagram showing another example of the correspondence between the field values ​​of the precoding information and the number of layers, and the number of layers and TPMI. In FIG. 9, the correspondence is shown when maxRank=3 or 4 and ul-FullPowerTransmission is set to fullpowerMode1.

[0103] In FIG. 9, the precoding information field is 6 bits when a partial and non-coherent codebook subset is configured in the UE, and is 4 bits when a non-coherent codebook subset is configured in the UE.

[0104] As shown in FIG. 9, similar to FIG. 7, the number of layers and TPMI corresponding to a value of a certain precoding information field may be the same (common) regardless of the codebook subset configured in the UE.

[0105] (Transmission of More Than Four Antenna Ports) Rel. 15 / 16 NR supports uplink (UL) multi-input multi-output (MIMO) transmission with up to four layers. For future wireless communication systems, support for UL transmission with more than four layers is being considered to achieve higher spectral efficiency. For example, for Rel. 18 NR, maximum six-rank transmission using six antenna ports and maximum six- or eight-rank transmission using eight antenna ports are being considered.

[0106] FIG. 10 is a diagram showing an example of an antenna layout for eight antenna ports. ｇ ) is the number of antenna groups. M is the number of antennas (or antenna elements) in the first dimension, and N is the number of antennas (or antenna elements) in the second dimension. The first and second dimensions are, for example, horizontal and vertical directions. P is the number of polarization planes. When P=2, it becomes a cross-polarized antenna. The antenna layout (M, N) of each antenna group is expressed as (N １ , N ２ ) or N ｇ Antenna layout of antenna groups (N ｇ , M, N) is (N ｇ , N １ , N ２ ) may also be expressed as:

[0107] An antenna group may be referred to as a coherent group. A coherent group may include one or more coherent ports. For example, a partially coherent UE may have multiple coherent groups. Antenna ports within a coherent group may be coherent. Antenna ports between different coherent groups may not be coherent.

[0108] Each coherent group may correspond to a different transmit panel / transmit chain / SRS resource set / RS resource set / spatial relation information / joint Transmission Configuration Indication state (joint TCI state) / UL TCI state / received TRP. Here, the SRS resource set may specifically correspond to an SRS resource set used for codebook or non-codebook. Each coherent group may also correspond to a different received TRP. A coherent group may also be referred to as a coherent antenna group, a port group, an antenna set, etc.

[0109] The UE may report supported antenna groups / antenna configuration information / coherent number as UE capability information. Also, the UE may be configured with coherent groups (e.g., the number of coherent groups and the number of ports included in each coherent group) by higher layer signaling.

[0110] The antenna layout is not limited to the example shown in Fig. 10. For example, the number of panels on which antennas are arranged, the orientation of the panels, the coherency of each panel / antenna (fully coherent, partially coherent, non-coherent, etc.), the antenna arrangement in a specific direction (horizontal, vertical, etc.), and the polarization antenna configuration (single polarization, cross polarization, number of polarization planes, etc.) may be different from this example. dG-H and dG-V represent the horizontal and vertical spacings between the centers of adjacent antenna groups, respectively.

[0111] In addition, while Rel. 15 / 16 NR supported the transmission of one codeword (CW) in one PUSCH, for Rel. 18 NR, the UE is considering transmitting more than one CW in one PUSCH. For example, support for two CW transmissions for ranks 5-8 and two CW transmissions for ranks 2-8 is being considered.

[0112] In addition, while Rel. 15 and Rel. 16 UEs are expected to use only one beam / panel for UL transmission at a given time, in Rel. 17 and later, simultaneous UL transmission (e.g., PUSCH transmission) of multiple beams / panels for one or more TRPs is being considered to improve UL throughput and reliability. Note that simultaneous PUSCH transmission of multiple beams / panels may correspond to PUSCH transmission with more than four layers or PUSCH transmission with four or fewer layers.

[0113] Also, precoding matrices for UL transmission using more than four antenna ports (a number of antenna ports greater than four) are being considered, for example, a codebook for 8-port transmission (which may be called an 8 TX UL codebook, etc.).

[0114] The 8-transmit UL codebook may include TPMI indices corresponding to multiple codebook subsets and corresponding precoding matrices W for i-layer (i is an integer, e.g., i=1, 2, ..., 8) transmissions using 8 antenna ports, similar to Figures 1-4. Antenna groups may be taken into account when considering the codebook.

[0115] 11A to 11C are diagrams illustrating an example of a precoder associated with an antenna group. ｇ = n (n is an integer, for example, 2, 4) 8TX" is "N ｇ = transmission using antenna layout / antenna ports with n antenna groups”.

[0116] FIG. 11A shows the N ｇ = 2 of 8TX (8TX with N g =2). The PC precoder is ｎＴＸ，ｉ may be included in the diagonal blocks.

[0117] Here, in this disclosure, W in a matrix ｎＴＸ，ｉ(n, i are integers. For example, n=2, 4, ..., i=1, 2, 3, ...) means the i-th nTX (n-port) FC precoder included in the matrix. W ｎＴＸ，ｉ The number of columns in W may vary depending on the case (e.g., depending on the rank of the matrix). ０ means a matrix in which all elements are 0. ０ The number of rows / columns of W varies depending on the case (for example, if the above matrix is ​​a block matrix, W ０ may depend on other blocks located in the same row or column).

[0118] FIG. 11A corresponds to the case where two antenna groups are used, and (W ４ＴＸ，１ Rank W ４ＴＸ，２ (rank of antennas) = ​​(1,1), (2,2), (3,3), (4,4), (1,2), (2,1), (2,3), (3,2), (3,4), (4,3), etc. ４ＴＸ，１ Or W ４ＴＸ，２ In this case, the signal may be transmitted using ４ＴＸ，１ Rank W ４ＴＸ，２ The rank of the input signal may be (1, 0), (2, 0), (3, 0), (4, 0), (0, 1), (0, 2), (0, 3), (0, 4), etc.

[0119] FIG. 11B shows the N ｇ This PC precoder is for 8TX with Ng=4. ｎＴＸ，ｉ may be included in the diagonal blocks. ４ＴＸ，ｉ The combinations of ranks range from 1 to 8 in total, and similar to the example of FIG. 11A, some degree of freedom in combinations may be supported.

[0120] FIG. 11C shows the N ｇ 11C relates to an NC precoder for 8TX with Ng=8. The NC precoder is rank 1. For NC precoders for ranks 2-8, any combination of the eight NC precoders in FIG. 11C may be supported. For example, a total of 255 precoders may be supported for ranks 1-8.

[0121] In addition, for the 8-transmission UL codebook, it is being considered to specify a new correspondence relationship between the value of the precoding information field and the number of layers and TPMI (for example, a correspondence relationship different from the correspondence relationships in Figures 7 to 9).

[0122] (Codebook Types) The following codebook types, codebook 1 to codebook 4, are considered to be defined for transmission using eight antenna ports: ｇ = 1 case. Codebook 2 is a fully coherent codebook for the case N ｇ - Codebook 3 is a partially coherent codebook that uses two antenna port groups in the case of N = 2. ｇ - Codebook 4 is a partially coherent codebook that uses 4 antenna port groups in the case of N = 4. ｇ This is a non-coherent codebook for the case where .times. ...

[0123] In transmission using eight antenna ports, the precoding matrix W is obtained by using an intermediate precoding matrix (intermediate precoder matrix) W′ as follows: ｆ（ｉ） =W' ｉ where i and f(i) are row indices. Figure 12 shows an example of a port mapping function f(i) for each codebook type.

[0124] In transmission using more than four antenna ports, the relationship between the TPMI index and the precoding matrix, and the relationship between the precoding information field and the TMPI index have not been sufficiently considered. If this consideration is insufficient, it may be impossible to control appropriate full power transmission, which may inhibit an increase in communication throughput.

[0125] Therefore, the present inventors have conceived a method for appropriately performing UL full power transmission using more than four antenna ports.

[0126] 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.

[0127] 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."

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] In the following embodiments, "plurality" and "two" may be read interchangeably.

[0137] The number of layers for PUSCH transmission in the following embodiments may be greater than 4 or less than 4. For example, PUSCH transmission of two CWs in the present disclosure may be performed with a number of layers less than 4 (for example, 2). In addition, the maximum number of layers is not limited to 4 or more, and may be less than 4.

[0138] Furthermore, PUSCH transmission in the following embodiments may or may not be based on the premise that multiple panels are used (it may be applied regardless of the panels).

[0139] In the present disclosure, Mode 0, Mode 1, and Mode 2 UEs refer to, but are not limited to, UEs configured with UL full power transmission mode information indicating fullpower, fullpowerMode1, and fullpowerMode2, respectively. In the present disclosure, fullpower, fullpowerMode1, and fullpowerMode2 may be referred to by other names (e.g., fullpower-r17, fullpowerMode1-r17, and fullpowerMode2-r17). Also, in the present disclosure, the UL full power transmission mode information may be a different parameter (e.g., ul-FullPowerTransmission-r17) instead of ul-FullPowerTransmission-r16.

[0140] In the following embodiments, the UEs transmitting at full power are assumed to be partially coherent / non-coherent UEs, but may also be UEs configured with other coherence types.

[0141] In the present disclosure, TPMI, TPMI index, precoder, and precoder index may be interchangeable. Port and antenna port may be interchangeable. 8TX (8 transmissions) may mean 8 ports and 8 antenna ports. Port / antenna port may mean a port / antenna port for UL (e.g., SRS / PUSCH) transmission. In the present disclosure, SRS resource set and resource set may be interchangeable. Coherent group and SRS resource set may be interchangeable.

[0142] Although this disclosure mainly describes 8TX, the same applies to 5TX, 6TX, 7TX, 8 or more TX, 4 or less TX, etc. In the following embodiments, "8" may be read as "n (n is any integer)," and in this case, those skilled in the art will be able to appropriately read the number of layers / ports, etc., described assuming that the maximum value is "8," assuming that the maximum value is "n."

[0143] For example, the number "8" in the following embodiments may be interpreted as any number greater than 4 (e.g., 6, 10, 12, 16, ...), or any number less than 4 (e.g., 1, 2, 3, 4).

[0144] It should be noted that in this disclosure, "having the capability of..." may be read interchangeably as "supporting / reporting the capability of...".

[0145] In the present disclosure, the terms rank, transmission rank, number of layers, and number of antenna ports may be interchangeable. Furthermore, the terms "one codeword is applied" and "the number of layers is four or less" may be interchangeable. The terms "two codewords are applied" and "the number of layers is greater than four" may be interchangeable.

[0146] In the present disclosure, a table may be read interchangeably as one or more tables.

[0147] In the present disclosure, the terms table, association, correspondence, combination, etc. may be read interchangeably.

[0148] The DCI in each embodiment may refer to a DCI (e.g., DCI format 0_x, 1_x (where x is an integer)) that schedules at least one of a PUSCH and a PDSCH. Furthermore, the following embodiments are based on the premise of codebook-based transmission (PUSCH), but are not limited thereto and may also be applied to non-codebook-based transmission (PUSCH).

[0149] In the present disclosure, full power transmission, full power UL transmission, UL full power transmission, UE maximum power transmission, UE maximum allowed power transmission, etc. may be read interchangeably.

[0150] In the present disclosure, "for a PC ( / NC / FC) precoder" may be interchangeably read as "when a codebook subset of PC ( / NC / FC) is configured for a UE."

[0151] In the present disclosure, "full power transmission is not considered" may be interpreted interchangeably as "full power transmission is not set for the UE," "full power mode 2 (fullpowerMode2) is set for the UE," or "full power (fullpower) is set for the UE," etc.

[0152] In the present disclosure, full power mode 2 may be interchangeably read as other full power modes (for example, full power mode 1, full power mode 3, or full power mode X (X is an arbitrary value)).

[0153] In the present disclosure, the precoding information field may be interchangeably referred to as a precoding information and layer number field, a TRI / TPMI field, a field that can be used to identify the number of layers (rank) or TPMI, a port index field, etc.

[0154] In the present disclosure, antenna groups, antenna port groups, and port groups may be read interchangeably.

[0155] In this disclosure, a b, a_b, and a with b added to the bottom right of a may be read interchangeably. c , a^c, and the notation of a with c added to the upper right of a may be read interchangeably. b c , a_b^c, a notation with b added to the bottom right of a and c added to the top right, may be read as interchangeable. In the present disclosure, ceil(x), ceiling function, and ceiling function may be read as interchangeable. In the present disclosure, floor(x), floor function, and floor function may be read as interchangeable. In the present disclosure, sqrt(x), square root (root), may be read as interchangeable. In the present disclosure, x ~ may be expressed by adding 〜 to the x, or may be referred to as x tilde. - may be expressed by adding a minus sign (-) to the top of x, or may be referred to as x-bar. In this disclosure, x mod y, mod(x,y), mod function, and modulo operation may be interchangeable. In this disclosure, Σ i=M N x i is the x for i=M,M+1,...,N i Summation of x M +x M+1 +...+x N , C(x,y) represents the number of combinations of x to y (combinatorial coefficient), and is also called the binomial coefficient.

[0156] In any table of the present disclosure, the value of a row index may be replaced with another value. In any table of the present disclosure, one or more rows may be omitted or one or more rows may be added. In this case, the value of a row index may be replaced with another value so that the row indices in the table are contiguous.

[0157] (Wireless Communication Method) In the present disclosure, the association between the precoding matrix W and the TPMI index may be defined in Specification for Physical Channels and Modulation 1 (Physical channels and modulation / Uplink / Physical channels / Physical uplink shared channel / Precoding). In the present disclosure, the association, table P-x, TMPI table, precoding matrix table, and precoder table may be interchangeable.

[0158] In the present disclosure, the association between the precoding information (TPMI) and the number of layers (TRI) and the index (precoding information field value) may be defined in Specification 2 for Multiplexing and Channel Coding (Multiplexing and Channel Coding / Downlink Transport Channels and Control Information / Downlink Control Information / DCI Formats / DCI Format 0_1). In the present disclosure, the association, Table D-x, TRI / TPMI indication table, DCI indication table, and precoding information table may be interchangeable.

[0159] <Embodiment 1> This embodiment relates to a TPMI table for one layer transmission using eight antenna ports.

[0160] It is considered that new separate TPMI tables will be introduced for different codebook types and different numbers of layers for eight antenna ports. The TPMI table for one-layer transmission may be applied both when transform (DFT) precoding is enabled and when transform precoding is disabled.

[0161] FIG. 13 shows the results of codebooks 1, N using 8 antenna ports with transform precoding enabled or transform precoding disabled. ｇ = 1, N １ = 4, N ２ 10 shows an example of the association (Table P-9) between precoding matrix W and TPMI index for 1-layer transmission (codebook1=ng1n4n1).

[0162] FIG. 14 shows the results of codebooks 1, N using 8 antenna ports with transform precoding enabled or with transform precoding disabled. ｇ = 1, N １ = 2, N ２ 10 shows an example of the association (Table P-17) between precoding matrix W and TPMI index for 1 layer transmission (codebook1=ng1n2n2) and 1 layer transmission.

[0163] FIG. 15 shows an example of the association (Table P-29) between precoding matrix W and TPMI index for codebook 2 (codebook2) and 1 layer transmission using 8 antenna ports with transform precoding enabled or transform precoding disabled.

[0164] FIG. 16 shows an example of the association (Table P-39) between precoding matrix W and TPMI index for codebook 3 (codebook3) and 1 layer transmission using 8 antenna ports with transform precoding enabled or transform precoding disabled.

[0165] According to this embodiment, the UE can apply the precoding matrix W for one layer transmission using eight antenna ports to both transform precoding enabled and transform precoding disabled, which makes the processing clearer / simpler.

[0166] <Embodiment 2> This embodiment relates to a precoding matrix W (precoder) for full power mode 1 (fullpowerMode1).

[0167] <<Embodiment 2-1>> A precoding matrix W (additional precoding matrix) for four-layer (rank 4) full power mode 1 (using all eight antenna ports) transmission using eight antenna ports may be added / defined / supported / indicated. An association (TPMI table) between a TPMI index and the additional precoding matrix may be added / defined / supported / indicated.

[0168] Figure 17 shows an example of the association between precoding matrix W and TPMI index (Table P-47) for codebook 4 and transmission using 8 antenna ports. This TPMI table may apply to up to 8 layers with transform precoding disabled and up to 1 layer with transform precoding enabled.

[0169] where column i of W is e i It is expressed using e i is the port p where layer i will be transmitted. i p has an element 1 in the row corresponding to p and an element 0 in all other rows. i <p i+1 is.

[0170] L=Σ p=0 7 δ(p)2 p If a layer is to be transmitted on port p, then δ(p)=1, otherwise δ(p)=0. Δ(z)=Σ k=1 z C(8,k).

[0171] TPMI indices 0 through Δ(v)−1 are mapped to multiple values ​​of L by first increasing the value of the number of transmission layers and then increasing the value of L for a given number of layers.

[0172] TPMI indices 255-258 may be associated with four additional precoding matrices for transmission of layers 1 to 4 using eight antenna ports, respectively. The TPMI indices associated with the additional precoding matrices may be referred to as dedicated TPMI indices to distinguish them from existing TPMI indices.

[0173] <<Embodiment 2-2>> A TRI / TPMI instruction table for rank 4 using full power mode 1 may be added / defined / supported / instructed.

[0174] FIG. 18 shows an example of the association (Table D-5M) between the precoding information (TPMI) and the number of layers (TRI) and the index (precoding information field value) for 8 antenna ports when the transform precoder is disabled, the maximum rank (maxRank) is 2, 3, or 4, the codebook type is codebook 4 (CodebookType=Codebook4), and the UL full power transmission (ul-FullPowerTransmission) is set to full power mode 1 (fullpowerMode1).

[0175] In this TRI / TPMI indication table, the indication of an additional precoding matrix is ​​as follows: precoding information field values ​​= 36, 37 when maxRank = 2, precoding information field values ​​= 92, 93 when maxRank = 3, and precoding information field values ​​= 162-165 when maxRank = 4. The indication of an additional precoding matrix for 1 layer / 2 layers may indicate a TPMI index in the TPMI table (table P-9 / P-30) for 1 layer / 2 layers. The indication of an additional precoding matrix for 3 layers / 4 layers may indicate a TPMI index in the TPMI table for 3 layers / 4 layers.

[0176] FIG. 19 shows an example of the association (Table P-30) between intermediate precoder matrix W′ and TPMI index for codebook 2 and two-layer transmission using eight antenna ports with transform precoding disabled.

[0177] <<Embodiment 2-3>> A TRI / TPMI instruction table corresponding to embodiment 2-1 may be added / defined / supported / instructed.

[0178] Figure 20 shows another example of the association of precoding information and number of layers with indexes (Table D-5M) for 8 antenna ports when the transform precoder is disabled, the maximum rank is 2 or 3 or 4, the codebook type is codebook 4, and UL full power transmission is set to full power mode 1.

[0179] In this TRI / TPMI instruction table, the instruction for the additional precoding matrix is ​​a precoding information field value of 36, 37 when maxRank = 2, a precoding information field value of 92-94 when maxRank = 3, and a precoding information field value of 162-165 when maxRank = 4. The instruction for the additional precoding matrix may indicate TPMI indexes 255-258 in the TPMI table (table P-47) of embodiment 2-1.

[0180] Figure 21 shows an example of the association (Table D-5N) of precoding information and number of layers with indexes for 8 antenna ports when the transform precoder is enabled or when the transform precoder is disabled and the codebook type is codebook 4 and the UL full power transmission is set to full power mode 1 and the maximum rank is 1.

[0181] In this TRI / TPMI indication table, the indication of the additional precoding matrix is ​​a precoding information field value = 8. The indication of the additional precoding matrix may indicate the TPMI index 255 in the TPMI table (table P-47) of embodiment 2-1.

[0182] Figure 22 shows an example of the association (Table D-5O) of precoding information and number of layers with indexes for 8 antenna ports when the transform precoder is enabled or when the transform precoder is disabled and the codebook type is codebook 2 and UL full power transmission is set to full power mode 1 and the maximum rank is 1.

[0183] In this TRI / TPMI indication table, the indication of the additional precoding matrix is ​​Precoding Information field value = 32. The indication of the additional precoding matrix may indicate the TPMI index 32 in the TPMI table (table P-29).

[0184] Figure 23 shows an example of the association (Table D-5P) of precoding information and number of layers with indexes for 8 antenna ports when the transform precoder is enabled or when the transform precoder is disabled and the codebook type is codebook 3 and UL full power transmission is set to full power mode 1 and the maximum rank is 1 or 2 or 3 or 4.

[0185] In this TRI / TPMI indication table, the indication of the additional precoding matrix is ​​a precoding information field value = 16 when the transform precoder is enabled or when the transform precoder is disabled and maxRank = 1, a precoding information field value = 120, 121 when the transform precoder is disabled and maxRank = 2, and a precoding information field value = 424-426 when the transform precoder is disabled and maxRank = 3. The indication of the additional precoding matrix may indicate a TPMI index in the TPMI table (tables P-39 / P-40 / P-41) for 1 layer / 2 layers / 3 layers.

[0186] FIG. 24 shows an example of the association (Table P-40) between intermediate precoder matrix W′ and TPMI index for codebook 2 and two-layer transmission using eight antenna ports with transform precoding disabled.

[0187] FIG. 25 shows an example of the association (Table P-41) between intermediate precoder matrix W′ and TPMI index for codebook 3 and 3-layer transmission using 8 antenna ports with transform precoding disabled.

[0188] <<Embodiment 2-4>> A TPMI table for transmission using eight antenna ports may not include a row indicating an additional precoding matrix (or an intermediate precoder matrix W′ for an additional precoding matrix W). In this case, the TRI / TPMI indication table may refer to a TPMI index in an existing TPMI table.

[0189] 26 shows another example of table P-47, which does not include rows for TPMI indexes 255-258.

[0190] 27 shows another example of table P-29, which does not include a row for TPMI index 32.

[0191] 28 shows another example of table P-39, which does not include a row for TPMI index 16.

[0192] 29 shows another example of table P-40, which does not include a row for TPMI index 104.

[0193] 30 shows another example of table P-41, which does not include a row for TPMI index 304.

[0194] <<Embodiment 2-5>> An additional precoding matrix for full power mode 1 may be associated with an existing TPMI index in an existing TPMI table, or may be associated with a dedicated (additional) TPMI index in an additional TPMI table. For example, an additional precoding matrix of a certain rank may be associated with an existing TPMI index, and an additional precoding matrix of another rank may be associated with a dedicated TPMI index.

[0195] In the TRI / TPMI indication table, additional precoding matrices for ranks 1 and 2 may be associated with existing TPMI indexes, and additional precoding matrices for ranks 3 and 4 may be associated with dedicated TPMI indexes. In this case, the TPMI table may not include dedicated TPMI indexes for ranks 1 and 2, but may include dedicated TPMI indexes for ranks 3 and 4. In this case, tables P-29 / P-39 / P-40 / P-41 in embodiment 2-4 may be defined / applied. In table P-47 in embodiment 2-1, rows (additional precoding matrices) for TPMI indexes 255-258 may be deleted.

[0196] FIG. 31 shows another example of table D-5P.

[0197] In this TRI / TPMI indication table, the indication of an additional precoding matrix is ​​a precoding information field value of 16 when the transform precoder is enabled or when the transform precoder is disabled and maxRank=1, a precoding information field value of 120 or 121 when the transform precoder is disabled and maxRank=2, and a precoding information field value of 424-426 when the transform precoder is disabled and maxRank=3. The indication of an additional precoding matrix for 1 layer / 2 layers may indicate an existing TPMI index in the TPMI table for 1 layer / 2 layers (Table P-9 / P-30). The indication of an additional precoding matrix for 3 layers may indicate a dedicated TPMI index in the TPMI table for 3 layers (Table P-41).

[0198] In Table P-47 in Embodiment 2-1, the rows (additional precoding matrices) of TPMI indexes 255-256 for Layer 1 / Layer 2 may be deleted. In this case, in Table P-47 in Embodiment 2-1, TPMI indexes 255-256 may be associated with precoding matrices of TPMI indexes 257-258 for Layer 3 / Layer 4, respectively, and the TPMI indices in Table P-47 may be consecutive. Table D-5P may include an indication of an additional precoding matrix when the transform precoder is disabled and maxRank=3 / maxRank=4. The indication of an additional precoding matrix for Layer 3 / Layer 4 may indicate a dedicated TPMI index in Table P-47.

[0199] <<Embodiment 2-6>> The aforementioned TPMI tables include one additional precoding matrix for each rank. Table P-29 includes one additional precoding matrix corresponding to rank 1 for codebook 2. Table P-39 includes one additional precoding matrix corresponding to rank 1 for codebook 3. Table P-40 includes one additional precoding matrix corresponding to rank 2 for codebook 3. Table P-41 includes one additional precoding matrix corresponding to rank 3 for codebook 3. For example, table P-47 includes four precoding matrices corresponding to ranks 1 to 4, respectively, for codebook 4.

[0200] To the aforementioned TPMI tables (e.g., P-29 / P-39 / P-40 / P-41 / P-47), dedicated TPMI indexes corresponding to specific ranks and associations (rows) of additional precoding matrices may be added.

[0201] As in the second and third embodiments, an association (row) between a specific rank and a dedicated TPMI index may be added to the TRI / TPMI instruction table corresponding to the full power mode 1.

[0202] <<Embodiment 2-7>> Rank 4 (four layers) transmission using full power mode 1 may not be supported.

[0203] Table D-5M may be defined as the association of precoding information and layer number with index for 8 antenna ports when the transform precoder is disabled, the maximum rank is 2 or 3, the codebook type is codebook 4, and UL full power transmission is set to full power mode 1.

[0204] The number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 6 or 7 bits according to the TRI / TPMI indication table for 8 antenna ports and the maximum rank when the codebook type is codebook 4, the transform precoder is disabled, the maximum rank is 2 or 3, and UL full power transmission is not configured or is configured to full power.

[0205] The number of bits of the precoding information field in DCI format 0_2 may be determined to be 6 or 7 bits according to maxRankDCI-0-2 and a table in which maxRank in the TRI / TPMI indication table for 8 antenna ports is replaced with maxRankDCI-0-2 (maximum rank for DCI format 0_2) when the codebook type is codebook 4, the transform precoder is disabled, the maximum rank (maxRank) is 2 or 3, and UL full power transmission is not configured or is configured to full power.

[0206] According to this embodiment, the UE can use the appropriate precoding matrix for full power mode 1.

[0207] Third Embodiment This embodiment relates to a precoding information field.

[0208] In full power mode 2 (fullpowerMode2), N ｇ = 4 and N ｇ The case where N = 8 may not be supported. ｇ Full power mode 2 may be supported only in the case of =2.

[0209] The number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 6, 7, or 8 bits according to the TRI / TPMI indication table for 8 antenna ports and the maximum rank when the codebook type is codebook 4, the transform precoder is disabled, the maximum rank is 2, 3, or 4, and UL full power transmission is not configured or is configured to full power.

[0210] When the transform precoder is enabled, or when the maximum rank is 1 and the transform precoder is disabled and UL full power transmission is not configured or is configured to full power, the number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 3 bits according to the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 4.

[0211] According to the TRI / TPMI indication table for 8 antenna ports and the maximum rank when the codebook type is codebook 2, the transform precoder is disabled, and the maximum rank is 5, 6, 7, or 8, the number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 10 bits.

[0212] When the transform precoder is enabled, or when the maximum rank is 1, 2, 3, or 4, and the transform precoder is disabled, and UL full power transmission is not configured, or is configured to full power mode 2 (fullpowerMode2), or is configured to full power, the number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 5, 9, or 10 bits according to the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 2, the transform precoder, and the maximum rank.

[0213] According to the TRI / TPMI indication table for 8 antenna ports and the maximum rank when the codebook type is codebook 3, the transform precoder is disabled, and the maximum rank is 5, 6, 7, or 8, the number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 10 bits.

[0214] When the transform precoder is enabled, or when the maximum rank is 1, 2, 3, or 4, and the transform precoder is disabled, and UL full power transmission is not configured or is configured to full power, the number of bits of the precoding information field in DCI format 0_1 ​​may be determined to be 4, 7, 9, or 10 bits according to the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 3, the transform precoder, and the maximum rank.

[0215] A TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 4, the transform precoder is disabled, the maximum rank is 2, 3, or 4, and UL full power transmission is not configured or is configured to full power may be defined in the specification.

[0216] A TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 4 may be defined in the specification when the transform precoder is enabled, or when the maximum rank is 1 and the transform precoder is disabled and UL full power transmission is not configured or is configured to full power.

[0217] A TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 3 may be defined in the specification when the transform precoder is enabled, or when the maximum rank is 1, 2, 3, or 4, and the transform precoder is disabled, and UL full power transmission is not configured or is configured to full power.

[0218] The number of bits of the precoding information field in DCI format 0_2 may be determined to be 6, 7, or 8 bits according to maxRankDCI-0-2 and a table in which maxRank in the TRI / TPMI indication table for 8 antenna ports is replaced with maxRankDCI-0-2 (maximum rank for DCI format 0_2) when the codebook type is codebook 4, the transform precoder is disabled, the maximum rank (maxRank) is 2, 3, or 4, and UL full power transmission is not configured or is configured to full power.

[0219] When the transform precoder is enabled, or when the maximum rank (maxRank) is 1 and the transform precoder is disabled and UL full power transmission is not configured or is configured to full power, the number of bits of the precoding information field in DCI format 0_2 may be determined to be 3 bits according to a table in which maxRank in the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 4 is replaced with maxRankDCI-0-2.

[0220] When the transform precoder is enabled, or when the maximum rank (maxRank) is 1, 2, 3, or 4, and the transform precoder is disabled, and UL full power transmission is not set, or is set to full power mode 2 (fullpowerMode2), or is set to full power, the number of bits of the precoding information field in DCI format 0_2 may be determined to be 5, 9, or 10 bits according to the table in which maxRank in the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 2 is replaced with maxRankDCI-0-2, the transform precoder, and the maximum rank.

[0221] When the transform precoder is enabled, or when the maximum rank (maxRank) is 1, 2, 3, or 4, and the transform precoder is disabled, and UL full power transmission is not configured or is configured to full power, the number of bits of the precoding information field in DCI format 0_2 may be determined to be 4, 7, 9, or 10 bits according to the table in which maxRank in the TRI / TPMI indication table for 8 antenna ports when the codebook type is codebook 3 is replaced with maxRankDCI-0-2, the transform precoder, and the maximum rank.

[0222] According to this embodiment, the UE / BS can appropriately determine the size (number of bits) of the precoding information field.

[0223] <Supplementary Note> In the present disclosure, when a UE / base station uses (referring to / performing processing based on) a table, it does not necessarily mean using the table itself, but may also mean using an array, list, function, etc. that includes information that conforms to the table.

[0224] [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.

[0225] 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.

[0226] 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.

[0227] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0228] [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.

[0229] 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.

[0230] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0231] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0232] [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.

[0233] At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0234] The specific UE capabilities may indicate at least one of the following: - Supporting specific processing / operations / control / information for at least one of the above embodiments; - Supporting 8TX UL transmission; - Supported coherent groups; - Supported coherent types; - PA configuration related information; - Supporting full power mode 1 (for 8TX).

[0235] 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).

[0236] 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)).

[0237] Furthermore, at least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiments (or performs the operations of the above-described embodiments) through higher layer signaling / physical layer signaling. For example, the specific information may be information indicating enabling 8TX UL transmission, information indicating enabling full power mode 2, any RRC parameter for a specific release (e.g., Rel. 18 / 19), etc.

[0238] 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.

[0239] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1] A terminal comprising: a receiver that receives a configuration for uplink transmission using all eight antenna ports; and a controller that determines a precoding matrix based on at least one of a first association between precoding matrices for four-layer transmission using all eight antenna ports and Transmitted Precoding Matrix Indicator (TPMI) indices and a second association between TPMI indices corresponding to four-layer transmission using all eight antenna ports and values ​​of fields in downlink control information. [Supplementary Note 2] The terminal according to Supplementary Note 1, wherein the first association includes four precoding matrices corresponding to one layer to four layer transmission using all eight antenna ports, respectively. [Supplementary Note 3] The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein the second association includes TPMI indices in the first association. [Supplementary Note 4] The terminal according to any one of Supplements 1 to 3, wherein the first association for a certain rank does not include a dedicated precoding matrix, and the first association for another rank includes a dedicated precoding matrix.

[0240] (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.

[0241] 32 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).

[0242] 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.

[0243] 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.

[0244] 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))).

[0245] 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.

[0246] 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).

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0253] 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).

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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).

[0258] 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.

[0259] 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.

[0260] 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.

[0261] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the 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.

[0262] 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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).

[0267] (Base Station) Fig. 33 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.

[0268] 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.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] 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.

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

[0280] The transceiver 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] The transceiver 120 may transmit a configuration for uplink transmission using all eight antenna ports. The controller 110 may determine the precoding matrix based on at least one of a first association between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

[0285] (User terminal) Fig. 34 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] The transceiver 220 may receive a configuration for uplink transmission using all eight antenna ports (e.g., a UL full power transmission configuration set to full power mode 1 (full power mode 1)). The controller 210 may determine the precoding matrix based on at least one of a first association (e.g., a TPMI table) between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association (e.g., a TRI / TPMI indication table) between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

[0304] The first association may include four precoding matrices corresponding to transmission of layers 1 to 4, respectively, using all of the eight antenna ports.

[0305] The second association may include a TPMI index in the first association.

[0306] The first association for one rank may not include a dedicated precoding matrix, whereas the first association for another rank may include a dedicated precoding matrix.

[0307] (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.

[0308] 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.

[0309] 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. Figure 35 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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).

[0319] 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.

[0320] 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.

[0321] (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.

[0322] 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.

[0323] 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.

[0324] 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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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."

[0340] 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.

[0341] 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.

[0342] 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] 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.

[0347] 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).

[0348] 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).

[0349] 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).

[0350] 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.

[0351] 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.

[0352] 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).

[0353] 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.

[0354] 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.

[0355] 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.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] 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.

[0360] 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.

[0361] 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.

[0362] 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.

[0363] 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.

[0364] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0365] 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.

[0366] 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.

[0367] 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.

[0368] 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.

[0369] 36 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.

[0370] 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.

[0371] 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).

[0372] 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.

[0373] 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.

[0374] 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.

[0375] 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.

[0376] 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.

[0377] 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).

[0378] 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.

[0379] 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)).

[0380] 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.

[0381] 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.

[0382] 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.

[0383] 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.

[0384] 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.

[0385] 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).

[0386] 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."

[0387] 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.

[0388] 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.

[0389] 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.

[0390] 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.

[0391] 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...."

[0392] 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).

[0393] 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.

[0394] 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."

[0395] 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.

[0396] 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."

[0397] 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.

[0398] 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.

[0399] 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").

[0400] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0401] 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.

[0402] 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.

[0403] 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 a configuration for uplink transmission using all eight antenna ports; and a control unit that determines a precoding matrix based on at least one of a first association between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

2. The terminal of claim 1, wherein the first association includes four precoding matrices corresponding to transmission of layers 1 to 4, respectively, using all eight antenna ports.

3. The terminal of claim 1, wherein the second association includes a TPMI index within the first association.

4. The terminal of claim 1, wherein the first association for one rank does not include a dedicated precoding matrix, and the first association for another rank includes a dedicated precoding matrix.

5. A wireless communication method for a terminal, comprising: a step of receiving a configuration for uplink transmission using all eight antenna ports; and a step of determining a precoding matrix based on at least one of a first association between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

6. A base station having: a transmitting unit that transmits a configuration for uplink transmission using all eight antenna ports; and a control unit that determines a precoding matrix based on at least one of a first association between a precoding matrix for four-layer transmission using all eight antenna ports and a Transmitted Precoding Matrix Indicator (TPMI) index, and a second association between a TPMI index corresponding to four-layer transmission using all eight antenna ports and a value of a field in downlink control information.

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