Terminal, wireless communication method, base station and system

Abstract

A terminal according to an aspect of the present disclosure comprises: a control unit that, when a codebook subset indicating non-coherence or partial coherence is set, determines a precoder on the basis of a codebook for a transmission using more than four antenna ports; and a transmission unit that performs full power uplink transmission on the basis of the precoder. According to an aspect of the present disclosure, a full power UL transmission using more than four antenna ports can be appropriately controlled.

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP) 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) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 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 Summary of the Invention [Problem to be solved by the invention]

[0005] Rel.15 NR supports uplink (UL) multi-input multi-output (MIMO) transmission with up to four layers. For future NR, support for UL transmission with more than four layers is being considered to achieve higher spectral efficiency. For example, for Rel.18 NR, maximum 6-rank transmission using six antenna ports and maximum 6- or 8-rank transmission using eight antenna ports are being considered.

[0006] However, there has been little progress in studying UL full power transmission using more than four antenna ports (a number of antenna ports greater than four). For example, there has been little progress in studying how to control full power transmission when a non-coherent / partially coherent precoder is specified by DCI for a codebook for 1-8 layer transmission using eight antenna ports. Unless this issue is clarified, there is a risk that an increase in communication throughput will be suppressed.

[0007] Therefore, the present disclosure provides a terminal and a wireless communication method that can appropriately control UL full power transmission using more than four antenna ports. 、 base station and systems One of the aims is to provide [Means for solving the problem]

[0008] A terminal according to one embodiment of the present disclosure includes a non-coherent codebook for transmission using more than four antenna ports. Type and Partially Coherent Codebook At least one of the types If set and full power transmission mode using all antenna ports is configured, fully coherent for uplink (UL) full power transmission Precoder , based on the received downlink control information (DCI) a control unit that determines Fully coherent Based on the precoder The aforementioned A transmitter that performs full power transmission; The fully coherent precoder is an additional precoder W=1 / √8*[1 1 1 1 1 1 1 1] T ) . [Effects of the Invention]

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

[0010] [Figure 1] FIG. 1 is a diagram illustrating an example of a table of a precoding matrix W for single-layer (rank-1) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. [Figure 2] FIG. 2 is a diagram illustrating an example of a table of a precoding matrix W for two-layer (rank-2) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. [Figure 3] FIG. 3 is a diagram illustrating an example of a table of a precoding matrix W for three-layer (rank 3) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. [Figure 4] FIG. 4 is a diagram illustrating an example of a table of a precoding matrix W for four-layer (rank 4) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. [Figure 5] FIG. 5 is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 related to full power transmission. [Figure 6] 6A and 6B are diagrams showing an example of a TPMI group. [Figure 7] FIG. 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 in Rel. 16 NR. [Figure 8] 8A and 8B are diagrams showing an example of an antenna layout for eight antenna ports. [Figure 9]FIG. 9 is a diagram showing an example of an 8-transmission UL codebook proposed by the present inventors. [Figure 10] 10A and 10B are diagrams illustrating an example of a codebook for one-layer CSI reporting using PCSI-RS antenna ports in the existing Rel. 15 / 16 NR. [Figure 11] 11A and 11B are diagrams illustrating an example of a codebook for one-layer CSI reporting using PCSI-RS antenna ports in the existing Rel. 15 / 16 NR. [Figure 12] 12A to 12D are diagrams illustrating an example of a precoder capable of full power transmission according to the first embodiment. [Figure 13] FIG. 13 is a diagram illustrating an example of an 8-transmission 1-layer UL codebook for mode 1 UE according to the second embodiment. [Figure 14] FIG. 14 is a diagram illustrating an example of a TPMI group according to the third embodiment. [Figure 15] 15A and 15B are diagrams 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 in Rel. 16 NR. [Figure 16] FIG. 16 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 17] FIG. 17 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 18] FIG. 18 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 19] FIG. 19 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 20] FIG. 20 is a diagram illustrating an example of a vehicle according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (SRS, PUSCH transmission control) 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 to transmit a measurement reference signal (for example, a Sounding Reference Signal (SRS)).

[0012] Specifically, the UE may receive at least one of information about one or more SRS resource sets (SRS resource set information, e.g., the RRC control element "SRS-ResourceSet") and information about 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 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, 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 codebook-based transmission. The UE may determine a precoder for PUSCH transmission based on the SRI in the case of non-codebook-based transmission.

[0018] The SRS resource information may include an SRS resource ID (SRS-ResourceId), an SRS port number, an 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. Also, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CRI) may be interchangeable. Also, 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 SSB or CSI-RS and the SRS 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 spatial relationship information regarding a certain SRS (target SRS) resource is configured between another SRS (reference SRS) and the 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). Specifically, the UE may use spatial relationship information of the SRS resource (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 with 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 transmit 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 the upper layer parameter "nrofSRS-Ports" 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, the UE may be configured by RRC with a non-codebook-used SRS resource set having up to four SRS resources, 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 transmit beam for the PUSCH may be calculated based on (measurements of) the configured associated CSI-RS. Otherwise, the transmit 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 this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may refer to a PUSCH when a UE is configured with "codebook" as the transmission scheme. In this disclosure, 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 the transmission scheme.

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

[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 an RRC parameter "pusch-TransCoherence").

[0037] The UE may determine the precoder to be used for PUSCH transmission based on precoder type information (e.g., RRC parameter "codebookSubset") included in PUSCH configuration information notified by higher layer signaling (e.g., "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 capabilities may indicate full coherence, partial coherence, or noncoherence, and the RRC parameter "codebookSubset" may indicate full and partial and noncoherence, partial and noncoherence, or noncoherence.

[0040] Fully coherent may mean that all antenna ports used for transmission are synchronized (may also be expressed as being able to match the phase, being able to control the phase for each coherent antenna port, being able to apply a precoder appropriately for each coherent antenna port, etc.). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those some ports cannot be synchronized with other ports. Non-coherent may mean that each antenna port used for transmission cannot be synchronized.

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

[0045] In the present disclosure, the terms 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 the DCI (e.g., DCI format 0_1, etc.) that schedules the UL transmission.

[0047] Figures 1-4 are diagrams showing examples of associations between codebook subsets and TPMI indices. 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 W in ascending order of TPMI index from left to right (similarly for Figures 2-4).

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

[0049] In FIG. 1, if the codebook subset (codebookSubset) is fully, partial, and non-coherent (fullyAndPartialAndNonCoherent), the UE is notified of a TPMI of any one of 0 to 27 for single-layer transmission. Also, if the codebook subset is partial and non-coherent (partialAndNonCoherent), the UE is configured with a TPMI of any one of 0 to 11 for single-layer transmission. If the codebook subset is non-coherent, the UE is configured with a TPMI of any one of 0 to 3 for single-layer transmission.

[0050] Figures 2-4 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 TPMI that the UE is informed of for two-layer transmission is from 0 to 21 (codebook subset full, partial and non-coherent), from 0 to 13 (precoder type partial and non-coherent) or from 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 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, codebooks with TPMI=4 to 11).

[0057] In the present disclosure, a fully coherent codebook may refer 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 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, codebooks with TPMI=12 to 27).

[0058] (Full power UL transmission) According to the Rel.15 NR specification, the PUSCH transmission power is allocated equally to each antenna port. When a UE uses multiple ports for codebook-based transmission, if some codebooks (specifically, partially coherent / noncoherent codebooks) are used, the transmission power may be lower than in the case of a single port (full power transmission may not be possible).

[0059] For example, in the table of Figure 1, the transmit 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 using a codebook, it is preferable to properly perform full-power UL transmission. In Rel. 16 NR, the following UE Capabilities 1-3 related to codebook-based full-power UL transmission using multiple power amplifiers (PAs) were specified: UE capability 1: Supports (or has) a PA (fully rated PA) capable of outputting the maximum rated power in each Tx chain; UE Capability 2: None of the transmit chains support fully rated PA; UE Capability 3: A subset of the transmit chain 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 full power UL transmission capability to the network (e.g., base station) separately from the UE capabilities 1-3. The UE may be configured by the network to support full power transmission.

[0062] Figure 5 is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 related to full power transmission. Figure 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 indicates 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 this disclosure, P PA Assume that P≦P, but P PA In the case of >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 UE capability 2 configuration includes only non-fully-rated PAs and is expected to be inexpensive to implement, but because 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 that can transmit full power (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 numbers of antenna ports capable of full power transmission in UE capability 3 are not limited to these. PA =P / 2, but P PA The value of is not limited to this.

[0068] Incidentally, it is being considered that a UE supporting UE capability 2 or 3 is configured to operate in at least one of two modes (modes 1 and 2) for full power transmission.

[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 a "codebook" usage have the same number of SRS ports. A UE operating in Mode 1 may transmit at full power using all antenna ports (without 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 the precoder of the TPMI corresponding to "fullyAndPartialAndNonCoherent" 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 the "codebook" usage 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. Mode 2 UEs 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 (up to 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 the advantage over Mode 1 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, it is possible to transmit at full power using only antennas with fully rated PA, or only coherent antennas.

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

[0076] In Rel. 16 NR, a UE may report one or more of the following UE capability information indicating support for Mode 0 (ul-FullPwrMode-r16), UE capability information indicating support for Mode 1 (ul-FullPwrMode1-r16), and UE capability information indicating support for 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 showing an example of a TPMI group. Fig. 6A shows 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 (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.

[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 an SRS resource set whose usage is codebook has more than one SRS port.

[0085] Here, the non-zero PUSCH antenna port may refer to an antenna port having a non-zero PUSCH transmission power, or may refer to an antenna port whose value is not zero (e.g., 1, j) among the antenna ports whose 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. 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 with 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 a 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 to 7 corresponding to full-power TPMI for G4 in FIG. 6A is specified by the DCI, the Mode 2 UE applies 1 / √(the number of non-zero PUSCH antenna ports of W) (1 / √2 in this case) as the amplitude value of W corresponding to TPMI indices 4 to 7 (the coefficient part (½) of W) (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 to 7.

[0089] Furthermore, for the precoders corresponding to the 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, if only one SRS resource is configured in the SRS resource set whose usage is the codebook, the number of SRS ports may be the number of SRS ports associated with the SRS resource. If more than one SRS resource is configured in the SRS resource set whose usage is the codebook, the number of SRS ports may correspond to the number of SRS ports of the SRS resource indicated by the SRI. In the case where a partially coherent Mode 2 UE that reported G4 in Figure 6B performs 4-port 1-layer transmission in Figure 4, it can perform non-full-power transmission for TPMI indexes 8-11 (similar to Rel. 15).

[0090] A UE configured with 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 / √(number of non-zero PUSCH antenna ports in W) (1 for a noncoherent precoder and 1 / √2 for a partially coherent precoder) is used as the amplitude value of the corresponding W (coefficient part (1 / 2) of W). Also, the above s = 1 is used.

[0092] (Size of 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 (eg, 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 a setting for enabling or disabling a transform precoder for the PUSCH (e.g., upper layer parameter transformPrecoder), a setting for a codebook subset for the PUSCH (e.g., upper layer parameter codebookSubset), a setting for the maximum number of layers for the PUSCH (e.g., upper layer parameter maxRank), a setting for uplink full power transmission for the PUSCH (e.g., upper layer parameter ul-FullPowerTransmission), the number of antenna ports for the PUSCH, etc.

[0094] 7 is a diagram showing an example of a correspondence relationship between the field values ​​of precoding information and the number of layers and the number of layers and TPMI in Rel.16 NR. The correspondence relationship in this example is a correspondence relationship for four antenna ports when the transform precoder is disabled, the maximum rank (maxRank) is set to 2, 3, or 4, and uplink full power transmission is not set, is set to full power mode 2 (fullpowerMode2), or is set to full power, but is not limited to this. Note that it will be obvious to those skilled in the art that the illustrated "bit field mapped to index" indicates the field values ​​of the precoding information and the number of layers.

[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 Fig. 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 Fig. 7, the number of layers and TPMI indicated by values ​​= 0-11 in the precoding information field may be the same for the fully coherent (fullyAndPartialAndNonCoherent), partial coherent (partialAndNonCoherent), and noncoherent codebook subsets. Also, in Fig. 7, the number of layers and TPMI indicated by values ​​= 0-31 in the precoding information field may be the same for the fully coherent (fullyAndPartialAndNonCoherent) and partial 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] (Transmitting on more than 4 antenna ports) Rel.15 / 16 NR supports uplink (UL) multi-input multi-output (MIMO) transmission with up to four layers. To achieve higher spectral efficiency for future wireless communication systems, support for UL transmission with more than four layers is being considered. For example, for Rel.18 NR, maximum 6-rank transmission using six antenna ports and maximum 6- or 8-rank transmission using eight antenna ports are being considered.

[0099] 8A and 8B are diagrams showing an example of an antenna layout for eight antenna ports. FIG. 8A shows an example in which eight antennas are arranged one-dimensionally (1D), and FIG. 8B shows an example in which eight antennas are arranged two-dimensionally (2D). FIG. 8A corresponds to an antenna configuration having four cross-polarized antennas arranged in the horizontal direction. FIG. 8B corresponds to an antenna configuration having two cross-polarized antennas arranged in both the horizontal and vertical directions.

[0100] The numbers shown in the figure may indicate the numbers of the antenna ports corresponding to the antennas.

[0101] Note that the antenna layout is not limited to these examples. 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 the examples shown in Figures 8A and 8B.

[0102] Furthermore, while Rel. 15 / 16 NR supported the transmission of one codeword (CW) in one PUSCH, for Rel. 18 NR, UEs are being considered to transmit 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 are being considered.

[0103] In addition, in Rel.15 and Rel.16 UEs, it is assumed that only one beam / panel is used for UL transmission at a given time, but in Rel.17 and later, simultaneous UL transmission (e.g., PUSCH transmission) of multiple beams / multiple panels for one or more TRPs is being considered to improve UL throughput and reliability. Note that simultaneous PUSCH transmission of multiple beams / multiple panels may correspond to PUSCH transmission with a number of layers greater than four, or may correspond to PUSCH transmission with a number of layers less than or equal to four.

[0104] 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.) is being considered.

[0105] 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) transmission using 8 antenna ports, as shown in Figures 1-4.

[0106] FIG. 9 is a diagram showing an example of an 8-transmission UL codebook proposed by the present inventors.

[0107] Hereinafter, in this disclosure, for simplicity, the noncoherent precoder, the partially coherent precoder, and the fully coherent precoder will also be simply referred to as an NC (noncoherent) precoder, a PC (partial coherent) precoder, and an FC (full coherent) precoder, respectively.

[0108] Furthermore, hereinafter, in this disclosure, for simplicity, an NC / PC / FC precoder for i-layer (i is an integer; i=1 for a single layer) transmission of n antenna ports (n is an integer) will also be simply referred to as an n-port i-layer NC / PC / FC precoder.

[0109] The 8-transmission UL codebook in FIG. 9 includes X1 8-port 1-layer NC precoders, X2 8-port 1-layer PC precoders, and X3 8-port 1-layer FC precoders. In this example, assuming the above parameters, X1 = 2 and X2 = 4 (X3 will be described later). In this example, the TPMI index = 0-1 corresponds to the NC precoder, the TPMI index = 2-5 corresponds to the PC precoder, and the TPMI index = 6-37 corresponds to the FC precoder.

[0110] The 8-port 1-layer NC precoder can be selected from eight cases such as W = 1 / √8 * [1 0 0 0 0 0 0 0] T , 1 / √8 [0 1 0 0 0 0 0 0] T , …, 1 / √8 [0 0 0 0 0 0 0 1] T (T represents the transposed matrix. The same applies hereinafter).

[0111] The 8-port 1-layer PC precoder may be a port selection precoder for x ports (1 < x < 8) among the 8 ports. In this example, x = 2.

[0112] The 8-port 1-layer FC precoder may be the precoder W (more specifically, W CSI-RS ) of the DL type I single-panel codebook for P i_{1,1},i_{1,2},i_{2} (1) )=8 in the existing Rel.15 / 16 NR.

[0113] First, the DL type I single-panel codebook in the existing Rel.15 / 16 NR will be described.

[0114] FIGS. 10A and 10B are diagrams showing an example of a codebook for 1-layer CSI reporting using P CSI-RS antenna ports in the existing Rel.15 / 16 NR. The codebook in FIG. 10A corresponds to the codebook mode = 1. The codebook mode is set for the UE by the RRC parameter codebookMode.

[0115] Here, N1 and N2 represent the number of antenna ports in the first and second dimensions, respectively. For example, N1 may correspond to the number of antenna ports in the vertical direction, and N2 may correspond to the number of antenna ports in the horizontal direction, but the directions are not limited to these. N1 and N2 are configured in the UE by the RRC parameter n1-n2.

[0116] O1 and O2 may correspond to oversampling factors (spatial oversampling rates) corresponding to N1 and N2, respectively.

[0117] The value of the Precoding Matrix Indicator (PMI) that the UE reports to the base station (for example, by using a CSI report) is i 1,1 , i 1,2 and i2. 1,1 , i 1,2 and i2 correspond to the precoder W. The precoder W is a matrix v l,m Corresponds to.

[0118] 11A and 11B show the P CSI-RS 11A and 11B show examples of codebooks for one-layer CSI reporting using antenna ports. The codebook in Fig. 11A corresponds to codebook mode=2 and N2>1. The codebook in Fig. 11B corresponds to codebook mode=2 and N2=1.

[0119] Codebook mode=1 corresponds to the case where the same beam (e.g., the same spatial domain (SD) beam, the same spatial direction beam, the same direction beam) is applied to two different polarizations, and only phase selection is considered for the two different polarizations. Codebook mode=2 corresponds to the case where both beam and phase selection are considered for two different polarizations.

[0120] The 8-port 1-layer FC precoder may be the same as or different from the precoder W in the existing Rel. 15 / 16 NR (it may be a precoder obtained by extending / changing the W).

[0121] As the 8-port 1-layer FC precoder of the fourth embodiment, the number of CSI-RS antenna ports (P CSI-RS )=8, the precoder W (more precisely, W in Figures 10A, 11A, and 11B) of the DL type I single panel codebook l,m,n (1) ) is used, the 8-port 1-layer FC precoder is specified by i 1,1 , i 1,2 and i2 (or variables equivalent thereto; the same applies hereinafter) may also be used.

[0122] The TPMI index reported by the DCI may be at least one of the following: ·TPMI index is i 1,1 , i 1,2 and i2 correspond to the three indices (indicates / is), ·TPMI index is i 1,1 , i 1,2 and two of i2 (e.g., i 1,1 and i 1,2 ) and the first index of the index of i 1,1 , i 1,2 and a second index for the remaining indexes (e.g., i2) among i2, and corresponds to (indicates / is) ·TPMI index is i 1,1 , i 1,2 and corresponds to (is / indicates) the third index of the three indices of i2.

[0123] In addition, i 1,1 , i 1,2 and two of i2 (e.g., i 1,1 and i 1,2 ) and the first index, i1,1 , i 1,2 and the correspondence between the remaining index (e.g., i2) and the second index, i 1,1 , i 1,2 The correspondence between the three indexes i1 and i2 and the third index may be defined in advance by a standard, or may be configured / specified to the UE by RRC signaling / MAC CE.

[0124] For example, the third index is i 1,1 , i 1,2 The third index (TPMI index) = (I2 * N2 * O2) * a + I2 * b + c is based on a combination of (i 1,1 , i 1,2 , i2)=(a, b, c), where I2 is the number of possible values ​​of i2 for the codebook in question (4 in FIG. 10A, 16 in FIGS. 11A and 11B).

[0125] Note that N1, N2, the codebook mode, etc. may be configured in the UE using an UL codebook configuration (which may be referred to as, for example, an RRC information element ulCodebookConfig). The UL codebook configuration may be included in at least one of PUSCH configuration information (RRC information element PUSCH-Config) and configured grant configuration information (RRC information element ConfiguredGrantConfig) and notified to the UE.

[0126] 9, it is assumed that (N1, N2) = (2, 2) is predefined or configured in the UE, (O1, O2) = (2, 1) is predefined or configured in the UE, I2 = 4 is predefined or configured in the UE, and codebook mode = 1. In this case, X3 = 32.

[0127] In this case, TPMI index = 0 to X1-1 may indicate NC precoders, TPMI index = X1 to X1+X2-1 may indicate PC precoders, and TPMI index = X1+X2 or higher may indicate FC precoders. TPMI index = X1+X2 may indicate the first FC precoder (for example, (i 1,1 , i 1,2 , i2)=(0, 0, 0)). For example, 1,1 , i 1,2 , i2)=(a, b, c) may be represented by the TPMI index=X1+X2+(I2*N2*O2)*a+I2*b+c.

[0128] Note that the precoder included in the eight transmission UL codebooks and corresponding to a specific TPMI may be set / updated / activated (the correspondence may be updated) by the RRC / MAC CE.

[0129] Also, for the 8-transmission UL codebook, it is being considered to define 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 that in FIG. 7).

[0130] However, there has been little progress in studying UL full power transmission using more than four antenna ports (a number of antenna ports greater than four). For example, there has been little progress in studying how to control full power transmission when a non-coherent / partially coherent precoder is specified by DCI for a codebook for 1-8 layer transmission using eight antenna ports. Unless this issue is clarified, there is a risk that an increase in communication throughput will be suppressed.

[0131] Therefore, the present inventors have conceived a method for appropriately performing UL full power transmission using more than four antenna ports.

[0132] Hereinafter, embodiments of 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.

[0133] 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."

[0134] In the present disclosure, terms such as 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.

[0135] 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.

[0136] 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, and the like, or a combination thereof.

[0137] 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.

[0138] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0139] In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0140] In this 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.

[0141] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "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 TCI may be interchangeable with each other.

[0142] In the following embodiments, "plurality" and "two" may be read interchangeably.

[0143] 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.

[0144] Furthermore, PUSCH transmission in the following embodiments may or may not be premised on the use of multiple panels (may be applied regardless of the panels).

[0145] The number "8" in the following embodiments may be interpreted as any number greater than 4 (for example, 6, 10, 12, 16, ...) or any number less than or equal to 4 (for example, 1, 2, 3, 4).

[0146] In the present disclosure, Mode 0, 1, and 2 UEs refer to UEs configured with UL full power transmission mode information indicating fullpower, fullpowerMode1, and fullpowerMode2, respectively, but are not limited thereto. 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.

[0147] In the following embodiments, it is assumed that the UE performing full power transmission is a partially coherent / non-coherent UE, but it may also be a UE configured with another coherent type.

[0148] (Wireless communication method) First Embodiment The first embodiment relates to full power transmission with 8 antenna ports for a Mode 0 UE.

[0149] A Mode 0 UE may transmit at full power by applying any or a combination of the following: The scaling factor s mentioned above is fixed to 1 (i.e., s=1), Apply W in which the amplitude value for the non-coherent / partially coherent precoder (the amplitude value (coefficient part (1 / √8, etc.)) of the precoding matrix W) is changed to 1 / √(the number of non-zero PUSCH antenna ports of W).

[0150] 12A to 12D are diagrams illustrating an example of a precoder capable of full power transmission according to the first embodiment.

[0151] Mode 0 UE selects the 1-port selective precoder W=1 / √8*[1 0 0 0 0 0 0 0] shown in Figure 12A by the TPMI index. T When s is specified, W obtained by replacing 1 / √8 with 1 / √1=1 may be applied, and full power transmission may be performed according to s=1.

[0152] Mode 0 UE uses the 2-port selective precoder W=1 / √8*[1 0 0 0 1 0 0 0] shown in Figure 12B by the TPMI index. T When s is specified, W obtained by replacing 1 / √8 with 1 / √2 may be applied, and full power transmission may be performed according to s=1.

[0153] Mode 0 UE uses the 4-port selective precoder W=1 / √8*[1 0 1 0 1 0 1 0] shown in Figure 12C by the TPMI index. T When s is specified, W may be applied by replacing 1 / √8 with 1 / 2, and full power transmission may be performed according to s=1.

[0154] Mode 0 UE uses the 6-port selective precoder W=1 / √8*[1 1 1 1 1 0 1 0] shown in Figure 12D by the TPMI index. T When s is specified, W obtained by replacing 1 / √8 with 1 / √6 may be applied, and full power transmission may be performed according to s=1.

[0155] According to the first embodiment described above, the mode 0 UE can appropriately perform full power transmission using an 8-transmission UL codebook.

[0156] <Second embodiment> The second embodiment relates to full power transmission using 8 antenna ports for a Mode 1 UE.

[0157] A Mode 1 UE may transmit at full power by applying any or a combination of the following: The scaling factor s mentioned above is fixed to 1 (i.e., s=1), Use a precoder (supported (additional) for full power transmission) selected from fully coherent precoders.

[0158] A Mode 1 UE may determine the supported (additional) precoders for full power transmission based on specific rules / UE capabilities, or may be informed by the network using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels, or a combination thereof.

[0159] A Mode 1 UE may report information about supported (additional) precoders for full power transmission as UE capability information. The number of supported precoders may be limited because the more precoders supported, the higher the DCI overhead for precoder notification.

[0160] The (additional) precoders supported for full power transmission may include, for example, one or more of W corresponding to TPMI indices 6-37 in the UL codebook for 8-port 1 layer in FIG. 9. The (additional) precoders supported for full power transmission may also include one or more predefined simple precoders (e.g., W=1 / √8*[1 1 1 1 1 1 1 1]). T ) may also be included.

[0161] A Mode 1 UE that is a partially coherent / non-coherent UE may perform full power transmission using the (additional) precoder supported for full power transmission.

[0162] For a codebook for a specific layer, a precoder for full power transmission of Mode 1 UE may be supported in addition to the original fully coherent precoder (e.g., corresponding to an unused TPMI index). For example, for a codebook for one layer, only one precoder for full power transmission may be supported.

[0163] 13 is a diagram illustrating an example of an 8-transmission 1-layer UL codebook for a mode 1 UE according to the second embodiment. The same points as those in FIG. 9 will not be described again. The difference from FIG. 9 is that the FC precoder has only TPMI indexes 6-7 (corresponding to X3=2).

[0164] In this way, it is preferable that X3 be determined so that X1+X2+X3 can be expressed with the same number of bits as the number of bits required to express X1+X2 (in other words, the size of the TPMI index is the same as that of a partially coherent UE that is not configured with Mode 1 (that cannot transmit at full power)). This is expected to reduce the field size of the DCI.

[0165] W1 and W2 in FIG. 13 are 8-port 1-layer FC precoders, e.g., W i_{1,1},i_{1,2},i_{2} (1) or an 8-port simple precoder (e.g., W=1 / √8*[1 1 1 1 1 1 1 1] T ) may also be used.

[0166] According to the second embodiment described above, the mode 1 UE can appropriately perform full power transmission using an 8-transmission UL codebook.

[0167] <Third embodiment> The third embodiment relates to full power transmission with 8 antenna ports for a Mode 2 UE.

[0168] A Mode 2 UE may apply s=1 to a precoder corresponding to a TPMI reported as a TPMI group (which may be referred to as a full-power TPMI). The Mode 2 UE may perform full-power transmission by selecting W included in the 8-port UL codebook corresponding to the full-power TPMI and applying 1 / √(the number of non-zero PUSCH antenna ports of W) as the amplitude value of W (the coefficient part of W).

[0169] TPMI groups for more than four antenna ports may be defined.

[0170] 14 is a diagram showing an example of a TPMI group according to the third embodiment. This example shows a PA configuration and a precoding matrix (precoder) for each rank corresponding to the TPMI group when the number of transmit antenna ports is 8. When there are multiple precoders that can transmit at full power for the same rank, any of the multiple precoders can transmit at full power for that rank.

[0171] G0-GN (where N is an integer) may be a TPMI group for non-coherent UEs with 8 transmit antenna ports.

[0172] G0-GN and Ga-Gx (x is an alphabet) may be TPMI groups for partially coherent UEs with eight transmit antenna ports. Note that the group names are merely examples and are not limited to these.

[0173] For example, consider a case where a Mode 2 UE that has reported G0 in FIG. 14 is specified by DCI to perform 8-port 1-layer transmission. In this case, if the DCI specifies a TPMI index corresponding to full-power TPMI for G0, the Mode 2 UE applies 1 / √(the number of non-zero PUSCH antenna ports of W) (1 in this case) instead of the amplitude value 1 / √8 of W corresponding to the TPMI index. Also, the above s=1 is applied. This allows the Mode 2 UE to perform full-power transmission for the TPMI index.

[0174] Also, consider the case where a Mode 2 UE that reported Ga in FIG. 14 is specified by DCI to perform 8-port 1-layer transmission. In this case, if the DCI specifies a TPMI index corresponding to full-power TPMI for Ga, the Mode 2 UE applies 1 / √(the number of non-zero PUSCH antenna ports for W) (1 / √2 in this case) instead of the amplitude value 1 / √8 of W corresponding to the TPMI index. Also, apply s=1 above. This allows the Mode 2 UE to perform full-power transmission for the TPMI index.

[0175] According to the third embodiment described above, the mode 2 UE can appropriately perform full power transmission using an 8-transmission UL codebook.

[0176] <Fourth embodiment> The fourth embodiment relates to the size of the precoding information field.

[0177] [Other than Mode 1] When the transform precoder is disabled and uplink full power transmission is not configured, or is configured to full power mode 2 (fullpowerMode2), or is configured to full power, the size of the precoding information field for the correspondence for 8 antenna ports may be determined (or may vary) based on the codebook subset. The size of the field may be independent of or dependent on the maximum rank (maxRank).

[0178] [Mode 1] First, we will explain the precoding information field for the existing mode 1 in Rel.16 NR.

[0179] 15A and 15B are diagrams showing an example of a correspondence relationship between the field values ​​of the precoding information and the number of layers, and the number of layers and TPMI in Rel.16 NR. The correspondence relationship in Fig. 15A is for four antenna ports when the transform precoder is disabled, the maximum rank (maxRank) is set to 2, and uplink full power transmission is set to full power mode 1 (fullpowerMode1). The correspondence relationship in Fig. 15B is for four antenna ports when the transform precoder is disabled, the maximum rank (maxRank) is set to 3 or 4, and uplink full power transmission is set to full power mode 1 (fullpowerMode1).

[0180] 15A and 15B, compared to Fig. 7, it is supported that a partially coherent / non-coherent UE is assigned a TPMI corresponding to a fully coherent precoder. It can also be seen from Figs. 15A and 15B that one correspondence (table) is used for maximum rank=2, and another correspondence (table) is used for maximum rank=3 and 4.

[0181] When the transform precoder is disabled and the uplink full power transmission is set to full power mode 1 (fullpowerMode1), the size of the precoding information field for the correspondence for 8 antenna ports may be determined (or may vary) based on the codebook subset and the maximum rank. The same correspondence for 8 antenna ports may be defined for one or more maximum rank values, or different correspondences may be defined. The same additional precoder for 8 antenna ports may be supported for multiple correspondences corresponding to one or more maximum rank values, or different additional precoders may be supported.

[0182] In the correspondence relationship for eight antenna ports, additional precoders may be supported (used) for all layers 1 to 8, or additional precoders may not be supported for some layers.

[0183] According to the fourth embodiment described above, the size of the precoding information field can be appropriately determined even when full power transmission is effective.

[0184] <Supplementary information> Although the above embodiments have mainly described an 8-port, 1-layer UL codebook, it will be obvious to those skilled in the art that the present specification also supports similar embodiments for an 8-port, m-layer UL codebook (m is an integer greater than 1).

[0185] The UE may be notified by the network of the switching between 6 / 8-port full power transmission and 4-port or less full power transmission using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels, or a combination thereof.

[0186] It should be noted that at least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0187] The specific UE capabilities may indicate at least one of the following: Supporting the processing / operation / control / information for at least one of the above embodiments; Supporting PUSCH / SRS / PUCCH transmission using more than four (e.g., six, eight) antenna ports; Supports 8-port m-layer codebook; Supports 8-port m-layer NC / PC / FC precoder (m=1, 2, …) Support full power transmission (mode 0 / 1 / 2) TPMI group supports full power transmission mode 2, Support full power transmission (modes 0 / 1 / 2) with more than four antenna ports; TPMI group supporting full power transmit mode 2 with more than four antenna ports.

[0188] Furthermore, the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., cell, band, BWP), capabilities for each frequency range (e.g., FR1, FR2, FR3, FR4, FR5), or capabilities for each subcarrier spacing.

[0189] Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0190] Furthermore, at least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments by higher layer signaling. For example, the specific information may be configuration information for a PUSCH using more than four antenna ports, full power transmission (mode 0 / 1 / 2) using more than four antenna ports, any RRC parameters for a specific release (e.g., Rel. 18), etc.

[0191] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0192] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] a control unit that determines a precoder based on a codebook for transmission using more than four antenna ports when a codebook subset indicating non-coherence or partial coherence is set; a transmitting unit that performs uplink full power transmission based on the precoder. [Appendix 2] 2. The terminal of claim 1, wherein when mode 0 is configured for the uplink full power transmission, the precoder is a port selection precoder. [Appendix 3] 3. The terminal of claim 1 or 2, wherein when Mode 1 is configured for the uplink full power transmission, the precoder is a non-port selection precoder. [Appendix 4] 4. The terminal of claim 1, wherein when mode 2 is configured for the uplink full power transmission, the precoder is a precoder corresponding to a TPMI group for more than four reported antenna ports.

[0193] (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.

[0194] 16 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0195] 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.

[0196] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the 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.

[0197] 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 the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0198] 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.

[0199] 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 (CC) and dual connectivity (DC).

[0200] 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 above 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 be a frequency band higher than FR2.

[0201] 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.

[0202] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, 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.

[0203] 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.

[0204] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0205] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio 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).

[0206] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0207] 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.

[0208] 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)), etc. may be used as an uplink channel.

[0209] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0210] 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.

[0211] 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 an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0212] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search 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 a CORESET associated with a certain search space based on the search space configuration.

[0213] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0214] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement 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.

[0215] 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.

[0216] 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, 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 as DL-RS.

[0217] 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 the SS (PSS, SSS) and the PBCH (and 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 reference signals.

[0218] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. 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).

[0219] (base station) 17 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.

[0220] 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.

[0221] 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.

[0222] 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 to be transmitted as signals, control information, sequences, etc., 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.

[0223] 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.

[0224] The transmitting / receiving unit 120 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 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0225] 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 pertains, such as an array antenna.

[0226] 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.

[0227] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0228] The transceiver 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.

[0229] The transceiver 120 (transmission processor 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.

[0230] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0231] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0232] 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.

[0233] 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.

[0234] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0235] 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.

[0236] The transceiver 120 may transmit to the user terminal 20 information about a codebook for transmission of a certain number of layers using more than four antenna ports.

[0237] When the transceiver unit 120 configures a codebook subset indicating non-coherence or partial coherence for the user terminal 20, the transceiver unit 120 may receive an uplink full power transmission transmitted (by the user terminal 20) based on a precoder determined based on the codebook.

[0238] (user terminal) 18 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.

[0239] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, 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.

[0240] 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, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0241] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also 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.

[0242] 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 from 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.

[0243] 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.

[0244] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0245] 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.

[0246] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0247] The transceiver 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.

[0248] The transceiver 220 (transmission processor 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.

[0249] 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 when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0250] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0251] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0252] The transceiver 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 to acquire user data, etc.

[0253] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, 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.

[0254] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0255] Note that when a codebook subset indicating non-coherence or partial coherence is set, control unit 210 may determine a precoder based on a codebook for transmission using more than four antenna ports.

[0256] The transceiver 220 may perform uplink full power transmission based on the precoder (in other words, may perform uplink transmission at full power). Note that the uplink full power transmission may be full power transmission of PUSCH / PUCCH / SRS.

[0257] When Mode 0 is configured for the uplink full power transmission, the precoder may be a port selection precoder.

[0258] When mode 1 is configured for the uplink full power transmission, the precoder may be a non-port selection precoder.

[0259] When mode 2 is configured for the uplink full power transmission, the precoder may be a precoder corresponding to (or included in) a reported TPMI group for more than four antenna ports.

[0260] (Hardware configuration) 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 also be realized by combining the single device or multiple devices with software.

[0261] 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 mentioned above, the implementation method of each is not particularly limited.

[0262] For example, a base station, a user terminal, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 19 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.

[0263] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read 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.

[0264] 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.

[0265] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined 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.

[0266] 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), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0267] 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 realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0268] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0269] Storage 1003 is a computer-readable recording medium and may be constituted by 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, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0270] 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.

[0271] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0272] 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.

[0273] 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 such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0274] (Variation) Note that terms explained 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.

[0275] 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.

[0276] 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, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0277] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0278] 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.

[0279] 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.

[0280] 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 a subframe and a 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.

[0281] 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. However, the definition of TTI is not limited to this.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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 equal to or greater than 1 ms.

[0286] 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 also be determined based on numerology.

[0287] 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. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0288] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0289] 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.

[0290] A Bandwidth Part (BWP), which may also be referred to as a fractional 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 given BWP and numbered within that BWP.

[0291] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0292] 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."

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, 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.

[0300] Note that the physical layer signaling may be called 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 called 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).

[0301] 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).

[0302] 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).

[0303] 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.

[0304] 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), then these wired and / or wireless technologies are included within the definition of transmission media.

[0305] 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).

[0306] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0307] In this 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.

[0308] 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 divided 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 term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0309] 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.

[0310] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 20 is a diagram showing an example of a vehicle according to an embodiment. A 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.

[0316] 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 the user.

[0317] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., 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).

[0318] 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.

[0319] 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 (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0320] 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.

[0321] The driving assistance system unit 64 is configured with various devices that provide functions for preventing accidents and reducing 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.

[0322] 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.

[0323] 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 above-mentioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0324] 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.

[0325] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices 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)).

[0326] 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.

[0327] 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 uplink channel and downlink channel may be read as sidelink channel.

[0328] 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.

[0329] 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0330] 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 specific order presented.

[0331] 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 The present invention may be applied to systems that use 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0332] 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."

[0333] 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.

[0334] 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.

[0335] 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.

[0336] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0337] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0338] 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.

[0339] 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."

[0340] 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.

[0341] 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."

[0342] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0343] 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.

[0344] 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," etc. may be interchangeable (without being limited to the positive, comparative, or superlative). Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," etc. may be interchangeable (without being limited to the positive, comparative, or superlative) with "i-th" added (for example, "highest" may be interchangeable with "i-th highest").

[0345] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a control unit that determines a fully coherent precoder for uplink (UL) full power transmission based on received downlink control information (DCI) when at least one of a non-coherent codebook type and a partially coherent codebook type for transmission using more than four antenna ports is configured and when a full power transmission mode using all antenna ports is configured; a transmitter that performs the full power transmission based on the fully coherent precoder, The terminal, wherein the fully coherent precoder includes an additional precoder W=1 / √8*[1 1 1 1 1 1 1 1] T ).

2. The terminal of claim 1 , wherein the transmitter transmits capability information indicating that the full power transmission mode using more than four antenna ports is supported.

3. determining a fully coherent precoder for uplink (UL) full power transmission based on received downlink control information (DCI), when at least one of a non-coherent codebook type and a partially coherent codebook type for transmission using more than four antenna ports is configured and when a full power transmission mode using all antenna ports is configured; and performing the full power transmission based on the fully coherent precoder; The wireless communication method for a terminal, wherein the fully coherent precoder includes an additional precoder W=1 / √8*[1 1 1 1 1 1 1 1] T ).

4. a transmitter configured to transmit, to a terminal, information for setting at least one of a non-coherent codebook type and a partially coherent codebook type for transmission using more than four antenna ports, information for setting a full power transmission mode using all antenna ports, and downlink control information (DCI); a receiver for receiving an uplink (UL) full power transmission transmitted by the terminal based on a fully coherent precoder determined based on the DCI; The base station, wherein the fully coherent precoder includes an additional precoder W=1 / √8*[1 1 1 1 1 1 1 1] T ).

5. A system having a terminal and a base station, The terminal a control unit that determines a fully coherent precoder for uplink (UL) full power transmission based on received downlink control information (DCI) when at least one of a non-coherent codebook type and a partially coherent codebook type for transmission using more than four antenna ports is configured and when a full power transmission mode using all antenna ports is configured; a transmitter that performs the full power transmission based on the fully coherent precoder, The base station a receiver for receiving the full power transmission; The system, wherein the fully coherent precoder includes an additional precoder W=1 / √8*[1 1 1 1 1 1 1 1] T ).

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