Terminal, wireless communication method and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit, which generates TPMI group capability information based on a set of second TPMI groups (for terminals supporting fully coherent codebook subsets) defined as different from a set of first Transmitted Precoding Matrix Indicator (TPMI) groups for terminals supporting partially coherent codebook subsets; and a transmitting unit, which transmits the TPMI group capability information corresponding to the TPMI group supporting full power transmission. According to one embodiment of the present disclosure, full power transmission can be appropriately controlled.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate and low latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing capacity and sophistication than LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Subsequent systems of LTE (for example, also known as the fifth generation mobile communication system (5G), 5G+(plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also discussed.

[0004] Prior art literature

[0005] Non-patent literature

[0006] 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

[0007] Problems to be solved by the invention

[0008] In NR, user terminal (user equipment (UE)) capabilities associated with full-power UL transmission based on codebooks using multiple power amplifiers (PA) are being studied. In the discussion of NR so far, the following UE capabilities 1 to 3 have been proposed.

[0009] ● UE capability 1: Support (or have) a PA (full rated PA) that can output maximum rated power in each transmit chain;

[0010] UE capability 2: does not support full rated PA in any transmit chain;

[0011] UE capability 3: A subset (part) of the transmit chain supports the full rated PA.

[0012] In addition, the operation of full power transmission for UE supporting UE capability 2 or 3 is being studied, and at least one of two modes (mode 1, 2) is set. In Rel.16NR, the UE is studied to report UE capability information indicating support for mode 1, or to report UE capability information indicating support for mode 2, or to report UE capability information related to a TPMI set (also referred to as a TPMI group) capable of full power transmission with respect to mode 2.

[0013] However, what TPMI group the UE should report has not yet been studied. If the appropriate TPMI group is not reported, the UE cannot properly perform full-power transmission. If full-power transmission is not possible, coverage is reduced, and there is a risk that the increase in communication throughput is suppressed.

[0014] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station capable of appropriately controlling full-power transmission.

[0015] Means for solving problems

[0016] A terminal involved in one embodiment of the present disclosure includes: a control unit, which generates TPMI group capability information based on a set of second TPMI groups (for terminals supporting a fully coherent codebook subset) defined as different from a set of first transmitted precoding matrix indicators (Transmitted Precoding Matrix Indicator (TPMI)) groups for terminals supporting a partially coherent codebook subset; and a transmitting unit, which transmits the TPMI group capability information corresponding to the TPMI group supporting full power transmission.

[0017] Effects of the Invention

[0018] According to one aspect of the present disclosure, full power transmission can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram showing an example of the association between the precoder type and the TPMI index.

[0020] Figure 2 This is a diagram showing an example of a configuration of UEs assuming UE capabilities 1 to 3 associated with full-power transmission.

[0021] Figure 3A as well as Figure 3B This is a diagram showing an example of the TPMI group.

[0022] Figure 4 This is a diagram showing an example of a precoder and PA configuration capable of full-power transmission corresponding to a group to be reported in the first embodiment.

[0023] Figure 5 This is a diagram showing an example of a precoder and PA configuration capable of full-power transmission corresponding to a group reported in the first embodiment.

[0024] Fig. 6A as well as Figure 6B This is a diagram showing an example of a TPMI group that does not correspond to the PA configurations [20 17 17 17] and [17 17 17 17] and that takes antenna port switching between arbitrary ports into consideration.

[0025] Figure 7 It indicates the PA structure and Fig. 6A A diagram showing an example of the correspondence relationship between groups.

[0026] Fig. 8A as well as Figure 8B This is a diagram showing an example of a TPMI group that corresponds to the PA configurations [20 17 17 17] and [17 17 17 17] and that takes antenna port switching between arbitrary ports into consideration.

[0027] Fig. 9 It indicates the structure of PA and Fig. 8A A diagram showing an example of the correspondence relationship between groups.

[0028] Fig. 10A as well as Fig. 10B This is a diagram showing an example of a TPMI group that does not correspond to the PA structure [23 17 17 17] and takes antenna port switching between arbitrary ports into consideration.

[0029] Fig.11 It indicates the structure of PA and Fig. 10AA diagram showing an example of the correspondence relationship between groups.

[0030] Fig.12 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment.

[0031] Fig.13 It shows that Fig.12 FIG. 1 is a diagram showing an example of TPMI group capability information of a TPMI group.

[0032] Fig.14 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment.

[0033] Fig.15 It shows that Fig.14 FIG. 1 is a diagram showing an example of TPMI group capability information of a TPMI group.

[0034] Fig.16 It indicates the PA structure and Fig.14 A diagram showing an example of the correspondence relationship between groups.

[0035] Fig.17 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment.

[0036] Fig.18 It shows that Fig.17 FIG. 1 is a diagram showing an example of TPMI group capability information of a TPMI group.

[0037] Fig.19 It indicates the PA structure and Fig.17 A diagram showing an example of the correspondence relationship between groups.

[0038] Fig. 20 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in a modification of the second embodiment.

[0039] Fig.21 It shows that Fig. 20 FIG. 1 is a diagram showing an example of TPMI group capability information of a TPMI group.

[0040] Fig. 22 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0041] Fig.23 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0042] Fig.24This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0043] Fig.25 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0044] (PUSCH precoder)

[0045] In NR, the UE is studied to support at least one of codebook-based transmission (Codebook (CB)) and non-codebook-based transmission (Non-Codebook (NCB)).

[0046] For example, the UE uses at least the measurement reference signal (Sounding Reference Signal (SRS)) resource index (SRS Resource Index (SRI))) to determine the precoder (precoding matrix) used for sending the uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on at least one of the CB-based and NCB-based uplink shared channels.

[0047] In the case of CB-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of NCB-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0048] SRI, TRI, TPMI, etc. can also be notified to the UE using downlink control information (Downlink Control Information (DCI)). SRI can be specified by the SRS resource indicator field (SRSResource Indicator field (SRI field)) of the DCI, or by the parameter "srs-ResourceIndicator" contained in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH. TRI and TPMI can also be specified by the precoding information and number of layers field ("precoding information and number of layers" field) of the DCI.

[0049] The UE may also report UE capability information related to the precoder type, and the base station may set the precoder type based on the UE capability information through high-layer signaling. The UE capability information may also be information about the precoder type used by the UE in PUSCH transmission (also indicated by the RRC parameter "pusch-TransCoherence").

[0050] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0051] MAC signaling may also utilize, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also utilize, for example, Master Information Block (MIB), System Information Block (SIB), etc.

[0052] The UE may also determine the precoder to be used for PUSCH transmission based on the information of the precoder type included in the PUSCH configuration information (the "PUSCH-Config" information element of the RRC signaling) notified by the higher layer signaling (which may also be indicated by the RRC parameter "codebookSubset"). The UE may also be configured with a subset of the PMI specified by the TPMI through codebookSubset.

[0053] In addition, the precoder can also be specified by any one of full coherent (full coherent, fully coherent, coherent), partial coherent (partial coherent) and non coherent (non coherent) or a combination of at least two of them (for example, it can also be expressed by parameters such as "fully And Partial And Non Coherent", "partial And Non Coherent", etc.).

[0054] Full coherence may also mean that synchronization is achieved for all antenna ports used in transmission (which may also be manifested as being able to match phases, the same precoder applied, etc.). Partial coherence may also mean that synchronization is achieved between some of the antenna ports used in transmission, but the ports are not synchronized with other ports. Incoherence may also mean that synchronization is not achieved for the antenna ports used in transmission.

[0055] In addition, it is also conceivable that a UE supporting a fully coherent precoder type supports a partially coherent and incoherent precoder type. It is also conceivable that a UE supporting a partially coherent precoder supports an incoherent precoder type.

[0056] In the present disclosure, the precoder type may also be referred to as coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc.

[0057] The UE may also determine a precoding matrix corresponding to a TPMI index obtained according to DCI (eg, DCI format 0_1, the same below) sent by the scheduled UL from among multiple precoders (also referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0058] Figure 1 This is a diagram showing an example of the relationship between a precoder and a TPMI index. Figure 1 This table corresponds to a precoding matrix W for single-layer transmission using four antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, in which transform precoding is effective).

[0059] exist Figure 1 In the case where the precoder type (codebookSubset) is fullyAndPartialAndNonCoherent, the UE is notified of any TPMI from 0 to 27 for single-layer transmission. In addition, when the precoder type is partialAndNonCoherent, the UE is set to any TPMI from 0 to 11 for single-layer transmission. When the precoder type is nonCoherent, the UE is set to any TPMI from 0 to 3 for single-layer transmission.

[0060] Figure 1 This is a table specified in Rel.15NR. In this table, if the fully coherent transmission power corresponding to indexes 12 to 27 is set to 1 (= (1 / 2) 2 *4), the transmission power of the partial coherence equivalent to index 4 to 11 is 1 / 2 (= (1 / 2) 2 *2), which is equivalent to the incoherent transmission power of indexes 0 to 3 being 1 / 4 (= (1 / 2 2 *1)).

[0061] That is, according to the Rel.15NR specification, when the UE uses multiple ports for codebook-based transmission, if part of the codebook is used, the transmission power may sometimes be smaller than when a single port is used (full power transmission cannot be performed).

[0062] In addition, if Figure 1 As shown, a precoding matrix in which only one of the components of each column is not 0 can also be called a non-coherent codebook. A precoding matrix in which only a specified number (not all) of the components of each column are not 0 can also be called a partially coherent codebook. A precoding matrix in which all the components of each column are not 0 can also be called a fully coherent codebook.

[0063] Non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders. Fully coherent codebooks may also be referred to as non-antenna selection precoders.

[0064] In addition, in the present disclosure, the partially coherent codebook may also be equivalent to a codebook in which a UE that is set with a partially coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") excludes the codebook corresponding to the TPMI specified by the UE that is set with a non-coherent codebook subset (RRC parameter "codebookSubset" = "NonCoherent") from the codebook (precoding matrix) corresponding to the TPMI specified by the DCI for codebook-based transmission (that is, if it is a single-layer transmission with 4 antenna ports, the codebook with TPMI = 4 to 11).

[0065] In addition, in the present disclosure, a fully coherent codebook may also correspond to a codebook in which a UE that is set with a fully coherent codebook subset (for example, RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") excludes the codebook corresponding to the TPMI specified by the DCI for codebook-based transmission from the codebook (precoding matrix) corresponding to the TPMI specified by the UE that is set with a partially coherent codebook subset (RRC parameter "codebookSubset" = "partialAndNonCoherent") (that is, if it is a single-layer transmission with 4 antenna ports, the codebook with TPMI = 12 to 27).

[0066] (UE capability to transmit at full power)

[0067] Even when using a codebook, it is preferred to perform full-power UL transmission appropriately. Therefore, in NR, the UE capabilities associated with full-power UL transmission based on a codebook using multiple power amplifiers (PA) are studied. In the discussion of NR so far, the following UE capabilities 1 to 3 have been proposed.

[0068] UE capability 1: Support (or have) a PA that can output the maximum rated power in each transmit chain (Tx chain) (full rated PA);

[0069] UE capability 2: does not support full rated PA in any transmit chain;

[0070] UE capability 3: A subset (part) of the transmit chain supports the full rated PA.

[0071] In addition, a UE having at least one of the UE capabilities 1 to 3 may also mean supporting full power of UL transmission. The UE may also report capability information indicating support for UL full power transmission capability to the network (eg, base station) separately from UE capabilities 1 to 3. The UE may also be configured by the network to support full power transmission.

[0072] The UE capability 1 / 2 / 3 may be respectively renamed as UE capability 1 / 2 / 3 related to full power transmission, full power transmission type 1 / 2 / 3, power allocation type 1 / 2 / 3, etc. In the present disclosure, type, mode, capability, etc. may also be interchangeable. In addition, in the present disclosure, 1 / 2 / 3 may also be renamed as any combination of numbers or characters such as A / B / C.

[0073] Figure 2 This is an example of a configuration assuming UEs of UE capabilities 1 to 3 associated with full-power transmission. Figure 2 In FIG. 1 , only the PA and the transmission antenna port (which may also be referred to as the transmission antenna) are briefly shown as the structure of the UE. In addition, an example in which the number of the PA and the number of the transmission antenna ports are 4 is shown, but the present invention is not limited to this.

[0074] In addition, P represents the maximum output power of UE [dBm], P PA represents the maximum output power of the PA [dBm]. In addition, P can be 23dBm in a UE of power rank 3 and 26dBm in a UE of power rank 2, for example. In the present disclosure, it is assumed that P PA ≤P, but can also be PA >P, the embodiments of the present disclosure are applied.

[0075] The structure of UE capability 1 is assumed to have high installation cost, but it can use one or more arbitrary antenna ports to transmit at full power. The structure of UE capability 2 includes only a non-full-rated PA, which can be expected to be installed cheaply, but even if only one antenna port is used, full power transmission cannot be performed, so it is required to control the phase, amplitude, etc. of the signal input to the PA. In addition, UE capability 1 can also be called mode 0.

[0076] The structure of UE capability 3 is between the structures of UE capability 1 and UE capability 2. Antenna ports that can transmit at full power (in this example, transmit antennas #0 and #2) and antenna ports that cannot transmit at full power (in this example, transmit antennas #1 and #3) are mixed.

[0077] In addition, the index and number of antenna ports capable of full power transmission of UE capability 3 are not limited to this. In addition, in this example, it is assumed that the P of a non-full rated PA PA =P / 2, but P PA The value of is not limited to this.

[0078] However, a study is underway to set at least one of two modes (mode 1, 2) for full-power transmission operation for a UE supporting UE capability 2 or 3. Modes 1 and 2 may also be referred to as operation modes 1 and 2, respectively.

[0079] Here, mode 1 may also be a mode in which one or more SRS resources included in an SRS resource set of which the UE is set to use "codebook" have the same number of SRS ports (for example, may also be referred to as a first full-power transmission mode). A UE operating in mode 1 may also use all antenna ports for full-power transmission.

[0080] A UE operating in mode 1 may also be configured by the network to use a subset of the TPMI that combines ports within layer 1 for full power transmission. A TPMI precoder corresponding to "fullyAndPartialAndNonCoherent" defined in Rel.15NR may also be included, with a new codebook subset introduced only for rank values ​​that cannot be used in full power transmission.

[0081] On the other hand, mode 2 may also be a mode in which one or more SRS resources included in an SRS resource set whose usage is "codebook" of the UE have different numbers of SRS ports (for example, may also be referred to as a second full-power transmission mode). A UE operating in mode 2 may also use a portion of antenna ports for full-power transmission instead of using all antenna ports.

[0082] UEs operating in mode 2 can also send PUSCH and SRS in the same way regardless of whether antenna virtualization is used. For mode 2 UEs, since more SRS resources than 1 port are supported, the set of TPMIs used to achieve full power transmission can also be notified. In mode 2, 2 or 3 SRS resources can be set for each SRS resource set (a maximum of 2 in Rel.15NR).

[0083] Compared with Mode 2, Mode 1 has the advantage that the size of the required SRI field can be smaller (full power transmission can be performed through 1 SRS resource).

[0084] Mode 2 has the advantage of being able to dynamically switch between single-port transmission and multi-port transmission through DCI compared to Mode 1. In addition, since full-power transmission can be performed through a portion of the antenna ports, it is possible to perform full-power transmission using only antennas with full-rated PAs, or using only coherent antennas.

[0085] In addition, the UE may also determine the mode to be used in PUSCH transmission based on high-layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination of these. In other words, the UE may also be configured or instructed to use the PUSCH transmission mode through UL full power transmission mode information (ULFPTxModes) in high-layer parameters (e.g., PUSCH setting information (PUSCH-Config information element)).

[0086] In Rel.16NR, research is underway to report UE capability information indicating support for mode 1, or to report UE capability information indicating support for mode 2, or to report UE capability information related to a TPMI set (also referred to as a TPMI group) associated with mode 2 and capable of full-power transmission (for example, also referred to as TPMI group capability information).

[0087] In addition, regarding Mode 2, the use of the codebook and codebook subset of Rel.15NR is under discussion.

[0088] Figure 3A as well as Figure 3B This is a diagram showing an example of the TPMI group. Figure 3A Indicates the precoding matrix (precoder) of each rank corresponding to the TPMI group when the number of transmit antenna ports is 4. In this example, the precoder capable of full-power transmission for a certain rank corresponds to one or more precoders in a range distinguished by at least one of a colon ":" and a semicolon ";". In addition, when a precoder capable of full-power transmission for a certain rank has multiple precoders surrounded by "{}", any of the multiple precoders can perform full-power transmission for the rank. The number of columns of each matrix indicates the number of layers.

[0089] Figure 3B An example of TPMI groups assumed by a UE with four transmit antenna ports is shown. In this example, an incoherent UE with four transmit antenna ports can correspond to any of G0 to G3. A partially correlated UE with four transmit antenna ports can correspond to any of G0 to G6.

[0090] When the codebook subset included in the PUSCH setting information is non-coherent or partially coherent (RRC parameter "codebookSubset" = "NonCoherent" or "partialAndNonCoherent"), and the PUSCH setting information contains a parameter indicating full power transmission ("ULFPTx"), the UE may also scale (for example, multiply or divide) the linear value of the PUSCH transmission power determined based on the path loss, etc., by a certain coefficient s. This coefficient may also be called a power scaling factor.

[0091] For example, when the UL full power transmission mode information (ULFPTxModes) is set to mode 1 and each SRS resource of the SRS resource set used for the codebook has more than one SRS port, the UE may derive s = (number of non-zero PUSCH antenna ports / maximum number of SRS ports supported by the UE in one SRS resource).

[0092] Here, non-zero PUSCH antenna ports may also mean antenna ports with non-zero PUSCH transmit power, or may mean antenna ports with non-zero values ​​(e.g., 1, j) among the antenna ports for transmission represented by a precoding matrix (codebook subset).

[0093] A UE to which UL full power transmission mode information (ULFPTxModes)=Mode 2 is set (also referred to as Mode 2 UE) may apply s=1 to the TPMI precoder reported as the above-mentioned TPMI group.

[0094] Mode 2 UE may also derive s = (number of non-zero PUSCH antenna ports / number of SRS ports) for TPMI precoders other than those reported as the above TPMI group. Here, the number of SRS ports is the number of SRS ports associated with the SRS resource when only one SRS resource is set in the SRS resource set for the purpose of the codebook, and may also be equivalent to the number of SRS ports of the RSR resource represented by the SRI when more than one SRS resource is set in the SRS resource set for the purpose of the codebook.

[0095] The UE may also evenly divide the linear value of the PUSCH transmit power scaled by the coefficient x across the non-zero PUSCH antenna ports. The UE may also apply the determined (or assumed) coefficients to the precoding matrix to transmit the PUSCH at full power. In other words, the UE may also multiply the matrix portion of the precoding matrix by s (or √ s) matrix, and transmit PUSCH at full power.

[0096] As mentioned above, mode 2 requires the UE to report the TPMI group that supports UL full power transmission. However, it has not been discussed what TPMI group the UE should report (for example, whether only the above G0 to G6 are sufficient). As mentioned above, the TPMI group currently discussed is for non- / partially coherent UEs, and it has not been discussed what TPMI group should be reported when reporting TPMI group capability information for fully coherent UEs.

[0097] If the appropriate TPMI group is not reported, the UE cannot perform full-power transmission appropriately. If full-power transmission cannot be performed, coverage may be reduced, and there is a risk that increase in communication throughput may be suppressed.

[0098] Therefore, the inventors of the present invention analyzed the PA structure corresponding to the UE capability and came up with a set of groups suitable for reporting. According to one method of the present disclosure, for example, the UE can perform UL MIMO (Multi Input Multi Output) transmission in full power mode and maintain the same cell coverage as a single antenna. In addition, according to UL MIMO, spatial diversity gain is obtained, and an increase in throughput can be expected.

[0099] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0100] In addition, the “antenna” and “antenna port” in the following embodiments may be interchangeable.

[0101] In the present disclosure, "full power" may also be referred to as "power boost", "maximum power", "extended power", "power higher than Rel.15UE", etc.

[0102] Furthermore, in the present disclosure, having UE capability X (X=1, 2, 3) may be interchanged with reporting UE capability X, a structure utilizing UE capability X enabling full power transmission, and the like.

[0103] In the present disclosure, having a capability related to coherence (e.g., full coherence, partial coherence, incoherence) may also be interchanged with reporting the capability, being set to the coherence, and the like.

[0104] In addition, the non-coherent UE, partially coherent UE, and fully coherent UE may also be renamed as: UE with capabilities related to non-coherence, UE with capabilities related to partial coherence, and UE with capabilities related to full coherence, respectively.

[0105] In addition, non-coherent UE, partially coherent UE, and fully coherent UE may also respectively mean codebook subsets that are set as "non-coherent", "partial and non-coherent", and "fully and partial and non-coherent" through high-layer signaling. In addition, in the present disclosure, codebook subsets and codebooks may also be interchangeable.

[0106] A non-coherent UE, a partially coherent UE, and a fully coherent UE may also respectively mean a UE capable of transmitting using a non-coherent codebook, a partially coherent codebook, and a fully coherent codebook.

[0107] In the following embodiments, Mode 1 or 2 is described as being related to an SRS resource set for codebook use, but the present invention is not limited thereto. Mode 1 or 2 in each embodiment may be renamed as Mode 1 or Mode 2 for an SRS resource set for non-codebook use, for example.

[0108] In addition, in the present disclosure, "matrix of TPMI=X", "TPMI=X" and "TPMI index=X" may also be interchangeable. In addition, non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders. Fully coherent codebooks may also be referred to as non-antenna selection precoders. TPMI corresponding to antenna selection precoders may also be referred to as antenna selection TPMIs. TPMI corresponding to non-antenna selection precoders may also be referred to as non-antenna selection TPMIs.

[0109] In this disclosure, "TPMI precoder", "TPMI group", "one or more TPMI"

[0110] , “TPMI group starting full power”, “TPMI group supporting full power”, etc. can also be replaced with each other.

[0111] In the present disclosure, "supporting...", "reporting to the network the ability to...", etc. may also be replaced with each other.

[0112] In the present disclosure, capability information indicating support for mode X (X is an integer. For example, X=0, 1, 2) may also be referred to as mode X capability information. In addition, "capability information" in the present disclosure may also be simply changed to "information".

[0113] The "UE" in the following embodiments is assumed to be a UE supporting Mode 2, but is not limited thereto. In addition, in the following embodiments, an example of four transmission antenna ports is shown, but the number of transmission antenna ports may be replaced with another number.

[0114] (Wireless Communication Method)

[0115] In the following embodiments, a TPMI group for fully coherent UEs is proposed.

[0116] When the TPMI group for fully coherent UEs is introduced, the codebook subset included in the PUSCH setting information is non-coherent, partially coherent, or fully coherent (RRC parameter "codebookSubset" = "nonCoherent", or "partialAndNonCoherent" or "fullyAndPartialAndNonCoherent"). When the PUSCH setting information includes a parameter indicating full power transmission ("ULFPTx"), the UE can also scale the linear value of the PUSCH transmission power determined based on path loss, etc. by the power scaling factor s.

[0117] In addition, a table may be used to define different TPMI groups related to mode 2 operation according to non-coherent UEs, partially coherent UEs, and fully coherent UEs. In other words, the definition of the TPMI group may also be different according to the coherent capability. For example, a UE supporting mode 2 and having 4 transmit antenna ports (4Tx) may also select a TPMI group to be reported from a table corresponding to the coherent capability.

[0118] The number of bits used in the report of the TPMI group may also depend on the coherence capability. For example, the number of bits may be 2 bits for non-coherent UEs, 4 bits for partially coherent UEs, and X bits (eg, X=3) for fully coherent UEs.

[0119] The number of bits used in the TPMI group report may not depend on the coherence capability. For example, the number of bits may be X bits (eg, X=4) for any UE with any coherence capability.

[0120] The values ​​of these Xs may be determined according to the codebook subset included in the PUSCH configuration information, may be explicitly or implicitly set through RRC signaling, or may be predetermined by the specification.

[0121] <First Embodiment>

[0122] In the first embodiment, the TPMI group for fully coherent UEs is equivalent to the TPMI group for non-coherent / partially coherent UEs that has been agreed to be introduced. Figure 3A G0~G6) different tables.

[0123] This is because the TPMI groups (G0 to G6 in FIG3 ) that have been agreed to be introduced are limited to coherent port pairs of partially coherent UEs (e.g., pairs of ports 0 and 2, pairs of ports 1 and 3), and therefore also include definitions that are not suitable for fully coherent UEs. For example, a fully coherent UE with 4 transmit antenna ports has all ports 0 to 3 fully coherent, so any antenna port can be switched for full-power transmission. In addition, ports 0, 1, 2, and 3 are merely port numbers for ease of explanation, and may also correspond to any port numbers, respectively.

[0124] Therefore, in the first embodiment, the TPMI groups G0 to G6 for fully coherent UEs may be different from Figure 3A G0~G6 (in addition, the same group may exist).

[0125] In addition, in the present disclosure, a coherent port pair may also be replaced with a coherent subset, a coherent port set, etc.

[0126] It can also be assumed that the ports included in a coherent port pair are coherent with each other. It can also be assumed that the ports included in a coherent port pair are irrelevant to the ports included in other coherent port pairs. A fully coherent UE can also be assumed that any port pair is a coherent port pair.

[0127] [One group corresponds to one PA structure]

[0128] Reference Figure 4 as well as Figure 5 , illustrating an example of a group corresponding to a PA structure. Figure 4 This is a diagram showing an example of a precoder and PA structure capable of full-power transmission corresponding to a group to be reported in the first embodiment. In this example and subsequent examples, an example of a structure in which each PA corresponding to four transmission ports can adopt three output powers (23dBm, 20dBm, 17dBm) is shown.

[0129] Figure 4 The column "Precoder enabling full Tx power" of FIG. 1 shows an example of a precoder capable of full Tx power. In this example, for example, G0 indicates that Figure 3A In addition to the antenna selection precoder (=1 / 2[1 0 0 0]) of G0 that can transmit at full power, all fully coherent TPMIs (e.g., Figure 1The TPMI representing the fully coherent codebook can also be transmitted at full power. In addition, in this example and the following figures, as an example of fully coherent TPMI,

[0130] [Mathematical formula 1]

[0131]

[0132] However, the fully coherent TPMI in which the UE can perform full power transmission is not limited thereto.

[0133] G10 is different from other groups in that full-power transmission is possible only through a non-antenna selective precoder (full-power transmission is not possible through an antenna selective precoder).

[0134] Figure 4 The column of "PA architecture" represents the PA architecture. The PA architecture may also represent the output voltage of the PA corresponding to ports 0, 1, 2, and 3 from the left (or the reverse order). In addition, these ports may be replaced arbitrarily. The UE may also be conceived to be able to transmit at full power with a single port corresponding to "23". The UE may also be conceived to be able to transmit at full power using two or more ports corresponding to "20". The UE may also be conceived to be able to transmit at full power using four or more ports corresponding to "17".

[0135] The UE can also receive the full coherent UE Figure 4 At least one group is selected from G0 to G10 of the table, and TPMI group capability information indicating the selected group is sent to the network.

[0136] In addition, it can also be imagined that a fully coherent UE can implement UL full power transmission based on a specific TPMI group without reporting TPMI group capability information. For example, a fully coherent UE that does not report TPMI group capability information can also implement full power transmission based on G10 (that is, full power transmission based on TPMI with only non-zero PUSCH ports that utilize a fully coherent codebook). In this case, the fully coherent UE can also use G10 as TPMI group capability information without explicitly reporting it.

[0137] Figure 5 This is a diagram showing an example of a precoder and PA configuration capable of full-power transmission corresponding to a group to be reported in the first embodiment. Figure 5 and Figure 4 The difference is that the fully coherent TPMI is not included in the table. Figure 4 G0~G10 all support full power transmission of fully coherent TPMI, so Figure 5 This is equivalent to a table with this omitted. Figure 5 The PA structure and Figure 4 same.

[0138] The UE can also receive the full coherent UE Figure 5 At least one group is selected from G0 to G10 of the table, and TPMI group capability information indicating the selected table is transmitted to the network. In addition, the fully coherent UE may be capable of performing UL full power transmission based on a specific TPMI group as described above without reporting the TPMI group capability information.

[0139] [One group corresponds to multiple PA structures]

[0140] Refer to Figures 6 to Fig.11 , illustrating an example in which one group can also correspond to multiple PA structures. The inventors of the present invention considered that a fully coherent UE can switch any antenna port, and noticed that when determining the TPMI group, it is more important to know how much power and what kind of power each PA can output than how the PAs are arranged, thereby discovering the structure of these groups.

[0141] Fig. 6A as well as Figure 6B A diagram showing an example of a TPMI group that does not correspond to the PA configurations [20 17 17 17] and [17 17 17 17] and that takes antenna port switching between arbitrary ports into consideration.

[0142] Fig. 6A TPMI groups, corresponding precoders capable of full-power transmission, and PA configurations are shown in FIG. Figure 5 Likewise, each group supports full power transmission of fully coherent TPMI, so fully coherent TPMI is not included in Fig. 6A in the table.

[0143] Fig. 6A The column of "Supported ranks" indicates the ranks supported in the PA structure corresponding to the TPMI group. In this example, the maximum rank for the PA structure may also be determined based on the UE capability (TPMI group).

[0144] Figure 6B It shows that Fig. 6A FIG. 1 is a diagram of an example of TPMI group capability information for a TPMI group. In this example, a fully coherent UE with 4 transmit antenna ports (4Tx) can report a 3-bit TPMI group capability information value ("Bit field mapped to index" in the figure) and the corresponding group.

[0145] exist Figure 6B In the example, the bit field values ​​0 to 4 correspond to one group (G0 to G4) respectively. On the other hand, the bit field values ​​5 to 7 are reserved ("Reserved"), but the present invention is not limited to this.

[0146] Figure 7 It indicates the structure of PA and Fig. 6A In this example, considering all UE capabilities 1 to 3, an example of a structure in which each PA corresponding to four transmission ports can adopt three output powers (23dBm, 20dBm, and 17dBm) is shown.

[0147] The leftmost column is an index that is used to associate the PA structure with the TPMI group. In this example, since there are 3 output powers for 4 PAs, the index value that can be used is 3. 4 =81 kinds.

[0148] Indexes #1 to #64 correspond to PA structures that include one or more but less than three UE capability 3 of 23dBm. Indexes #65 to #75 correspond to PA structures that do not include UE capability 2 of 23dBm. Index #76 corresponds to PA structures that include only UE capability 1 of 23dBm. Indexes #77 to #81 correspond to PA structures that cannot transmit at full power in non-coherent or partially coherent precoders.

[0149] Mode 2 requiring reporting of the TPMI group corresponds to UE capability 2 or 3. Therefore, the UE may also assume that it is not necessary to report the TPMI group indicating the PA configuration corresponding to indexes #77 to #81.

[0150] Figure 7 The "PA architecture" column represents the PA architecture. Figure 7 The column of "Reported TPMI groups" indicates the groups that can represent the PA configuration. The PA configuration of "GX w / switching" means that it is represented by switching any port from the PA configuration of the group GX (X is an integer).

[0151] For example, the PA structure [17 23 17 17] of #16 can be realized by switching ports #0 and #1 of the PA structure ([23 17 1717] of #15) of group G0.

[0152] By using G0 to G4, all required PA structures can be reported.

[0153] Fig. 8A as well as Figure 8BThis is a diagram showing an example of a TPMI group that corresponds to the PA configurations [20 17 17 17] and [17 17 17 17] and takes into account antenna port switching between arbitrary ports.

[0154] Fig. 8A and Fig. 6A The difference is that group G5 is defined to indicate that full-power transmission is possible only with a non-antenna selective precoder (full-power transmission is not possible with an antenna selective precoder). Figure 8B and Figure 6B The difference is that the value of the bit field = 5 represents G5.

[0155] Fig. 9 It indicates the structure of PA and Fig. 8A An example of the correspondence relationship between the groups of . Figure 7 The difference is that G5 (or G5 with switching) is represented by indexes #77 to #81.

[0156] By using G0 to G5, all required PA structures can be reported.

[0157] In addition, a fully coherent UE with G5 capability cannot perform full-power UL transmission when the network specifies the antenna selection TPMI. As an advantage of UE reporting G5, the network sets an SRS resource set containing more than 2 SRS resources (for example, an SRS resource set used for codebook) for G5 UEs. In this case, the UE can use, for example, up to 4 PUSCH beams based on the instructions of the DCI, so flexible control is possible.

[0158] Fig. 10A as well as Fig. 10B A diagram showing an example of a TPMI group that does not correspond to the PA structure [23 17 17 17] and takes into account antenna port switching between arbitrary ports.

[0159] Fig. 10A Equivalent to deleting Fig. 6A G0, and Fig. 6A The table specifies G1 to G4 as G0 to G3. Fig. 10B As shown, Fig. 10A The four groups can be represented by 2 bits. Fig. 6A Compared with a set of equal groups, the number of TPMI groups (or sets of groups) to be reported is reduced, and capability information can be used effectively.

[0160] exist Fig. 10A In the set of groups, full power transmission of only one port according to the incoherent TPMI is supported, but the group that does not support full power transmission using multiple ports is indicated ( Fig. 6AG0) is not included. That is, in Fig. 10A In a set of groups, it means that each group supports full-power transmission using multiple ports.

[0161] Fig.11 It indicates the structure of PA and Fig. 10A An example of the correspondence relationship between the groups of . Figure 7 The difference is that indexes #15 to #18 are not reported, and G1 to G4 become G0 to G3.

[0162] In addition, a fully coherent UE that does not report TPMI group capability information will be notified of the incoherent TPMI of the four transmit ports ( Figure 1 In the case of TPMI=0~3), UL full-power PUSCH transmission can also be performed using any port (applying antenna port virtualization).

[0163] In addition, a fully coherent UE that does not report TPMI group capability information may also implement full-power transmission using multiple antenna ports (that is, full-power transmission according to the TPMI corresponding to the partial or full coherence codebook).

[0164] According to the first embodiment described above, the fully coherent UE can determine and report detailed PA configuration information using the TPMI group capability information.

[0165] <Second Embodiment>

[0166] In the second embodiment, the TPMI group for fully coherent UEs includes the TPMI group for non- / partially coherent UEs that has been agreed to be introduced ( Figure 3A G0~G6).

[0167] In addition, the TPMI group and the group set described in the second embodiment may also be used as a TPMI group for non- / partially coherent UEs.

[0168] Fig.12 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment. Fig.12 The TPMI group Figure 3A The same as the existing G0~G6.

[0169] The UE can also receive the full coherent UE Fig.12 At least one group is selected from G0 to G6 of the table, and TPMI group capability information indicating the selected group is sent to the network.

[0170] Fig.13 It shows that Fig.12FIG. 1 is a diagram showing an example of TPMI group capability information for a TPMI group. In this example, the correspondence between the value of the 4-bit TPMI group capability information (the "Bit field mapped to index" in the figure) that can be reported by a partially / fully coherent UE with 4 transmit antenna ports (4Tx) and the corresponding group is shown.

[0171] Fig.13 In the example, the bit field values ​​0 to 6 correspond to one group (G0 to G6). The bit field values ​​7 to 15 are reserved. The correspondence between the bit field values ​​and the groups is not limited to this. The same applies to the subsequent drawings related to the bit fields.

[0172] Fig.14 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment. Fig.14 The TPMI group can represent a combination of these in addition to the conventional G0 to G6 in FIG. 3 .

[0173] G0 to G6 can also represent the following PA structures respectively.

[0174] ● G0: Port 0 is 23dBm;

[0175] ● G1: Ports 0 and 2 are 23dBm;

[0176] ● G2: Ports 0, 1, and 2 are 23dBm;

[0177] ● G3: Ports 0, 1, and 2 are 20dBm;

[0178] ● G4: Ports 0 and 2 are 20dBm;

[0179] ● G5: Ports 0, 1, and 2 are 20dBm;

[0180] ● G6: Ports 0, 1, 2, and 3 are 20dBm.

[0181] The combination of multiple groups can also represent the following PA structures.

[0182] ● G0, G4: port 0 is 23dBm, port 2 is 20dBm;

[0183] ● G0, G5: port 0 is 23dBm, ports 1 and 2 are 20dBm;

[0184] ● G0, G6: port 0 is 23dBm, ports 1, 2, 3 are 20dBm;

[0185] ● G1, G5: Ports 0 and 2 are 23dBm, port 1 is 20dBm;

[0186] ● G1, G6: Ports 0 and 2 are 23dBm, ports 1 and 3 are 20dBm;

[0187] ● G2, G6: Ports 0, 1, and 2 are 23dBm, and port 1 is 20dBm.

[0188] The UE can also receive the full coherent UE Fig.14 At least one of the groups or the set of groups in the table is selected, and TPMI group capability information indicating the selected group or the set of groups is sent to the network.

[0189] Fig.15 It shows that Fig.14 FIG. 1 is a diagram showing an example of TPMI group capability information for a TPMI group. Fig.13 The difference is that the values ​​of the bit field = 7 to 12 correspond to {G0, G4}, {G0, G5}, {G0, G6}, {G1, G5}, {G1, G6}, {G2, G6} respectively.

[0190] Fig.16 It indicates the PA structure and Fig.14 In this example, it becomes Figure 7 Since the table is the same, the description will not be repeated.

[0191] Fig.16 The PA structures of "GX and GY" in the "Reported TPMI groups" column correspond to Fig.14 {GX, GY}. In addition, the PA structure of "GX and GY w / switching" means that it is expressed by switching an arbitrary port from the PA structure of the set of groups GX and GY (X, Y are integers).

[0192] in addition, Fig.14 The TPMI group does not correspond to Fig.16 The PA structure of index #76 shown is [23 2323 23], but this PA structure is originally supported in mode 0 and therefore does not need to be reported in mode 2.

[0193] Fig.14The TPMI group is suitable for the case where antenna port switching can be performed between any port pairs (for example, port 0 can be switched with any one of ports 0, 1, 2 and 3). On the other hand, a structure is also considered in which antenna port switching is performed only between a part of port pairs (port pairs included in the coherent port pairs of partially coherent UEs) even for fully coherent UEs. For example, the UE can switch port 0 only with ports 0 and 2 of the same coherent port pair constituting the partially coherent UE, and cannot switch with ports 1 and 3 of different coherent port pairs belonging to the partially coherent UE.

[0194] use Fig.17 , an example of a set of suitable TPMI groups when antenna port switching cannot be performed between arbitrary port pairs is described. Fig.17 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in the second embodiment. Fig.17 The TPMI group Fig.12 The difference is that G7 and G8 are added.

[0195] G7 to G8 can also represent the following PA structures respectively.

[0196] ● G7: Port 0 is 23dBm, port 1 is 20dBm;

[0197] ● G8: Ports 0 and 1 are 20dBm.

[0198] The UE can also receive the full coherent UE Fig.17 At least one of the groups or the set of groups in the table is selected, and TPMI group capability information indicating the selected group or the set of groups is sent to the network.

[0199] Fig.18 It shows that Fig.17 FIG. 1 is a diagram showing an example of TPMI group capability information for a TPMI group. Fig.13 The difference is that the value of the bit field = 7 to 14 corresponds to G7, G8, {G0, G4}, {G0, G5}, {G0, G6}, {G1, G5}, {G1, G6}, {G2, G6} respectively.

[0200] Fig.19 It indicates the PA structure and Fig.17 This example is a diagram of an example of the correspondence relationship between groups. Figure 7 The same table will not be described repeatedly. Fig.19 middle, Fig.16 Several PA structures were replaced with G7 or G8.

[0201] [Modification of the Second Embodiment]

[0202] Fig.12 , 14 In the set of groups described in 1 and 17, other groups (for example, G10 described in the first embodiment) may be further introduced.

[0203] Fig. 20 This is a diagram showing an example of a TPMI group and a corresponding precoder capable of full-power transmission in a modification of the second embodiment. Fig. 20 The TPMI group is equivalent to Fig.12 The TPMI group has been supplemented with the G10 table.

[0204] Fig.21 It shows that Fig. 20 FIG. 1 is a diagram showing an example of TPMI group capability information for a TPMI group. Fig.13 The difference is that the value of the bit field = 7 corresponds to G10.

[0205] In addition, in Fig.14 , 17 In the case of the introduction of G10, Fig.15 , 18 In the correspondence relationship of the TPMI group capability information, a bit field representing G10 may be introduced.

[0206] According to the second embodiment described above, the fully coherent UE can determine and report detailed PA configuration information using the TPMI group capability information.

[0207] <Others>

[0208] Furthermore, in the above-mentioned embodiments, UL transmission using the antenna port is described assuming that it is PUSCH, but full power transmission of at least one of other signals and channels may be controlled in addition to or instead of PUSCH.

[0209] That is to say, the antenna port in each of the above-mentioned embodiments can be at least one antenna port of PUSCH (and the demodulation reference signal (DeModulation Reference Signal (DMRS)) for PUSCH, phase tracking reference signal (Phase Tracking Reference Signal (PTRS))), uplink control channel (physical uplink control channel (Physical Uplink Control Channel (PUCCH))), random access channel (physical random access channel (Physical Random Access Channel (PRACH))), SRS, etc., and full-power transmission can also be applied to at least one of these signals and channels.

[0210] The UE may also determine which TPMI group capability information shown in the first embodiment and the second embodiment to use (for example, the first embodiment if reported) based on whether the UE has the capability to support antenna port switching between any port pairs (or whether information on the capability is reported).

[0211] The UE may also determine which TPMI group capability information of the first embodiment and the second embodiment to use (for example, the second embodiment if reported) based on whether it has the capability to support antenna port switching between port pairs included in a specific coherent port pair (or whether information on this capability is reported).

[0212] In addition, the numbers "23", "20", and "17" in the present disclosure are values ​​that take into account the output power of a power rank 3 UE, and are not limited to this. "23" can also be renamed as a first power value (for example, the maximum output power of a UE of a certain power rank), and "20" can also be renamed as a second power value (for example, the value of the maximum output power - 3 [dBm]). "17" can also be renamed as a third power value (for example, the value of the second power value - 3 [dBm]).

[0213] (Wireless Communication System)

[0214] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0215] Fig. 221 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0216] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple Radio Access Technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRAN-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0217] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0218] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NR-NR Dual Connectivity) (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0219] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The arrangement and number of each cell and the user terminal 20 are not limited to the illustrated method. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0220] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0221] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the 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 below 6 GHz (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited thereto. For example, FR1 may correspond to a frequency band higher than FR2.

[0222] Furthermore, the user terminal 20 may communicate in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0223] Multiple base stations 10 can be connected by wired (e.g., optical fiber, X2 interface, etc. in accordance with Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to a high-level station can be called an Integrated Access Backhaul (IAB) host, and the base station 12 equivalent to a relay station (relay) can also be called an IAB node.

[0224] The base station 10 may also be connected to the core network 30 via other base stations 10, or directly connected to the core network 30. The core network 30 may also include, for example, at least one of an evolved packet core (EPC), a 5G core network (5G Core Network (5GCN)), a next generation core (NGC), and the like.

[0225] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0226] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UP), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0227] The radio access scheme may also be referred to as a waveform. 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 radio access schemes for UL and DL.

[0228] In the wireless communication system 1, as a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. shared by each user terminal 20 can also be used.

[0229] In addition, in the wireless communication system 1, as uplink channels, 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)) and the like may be used.

[0230] The PDSCH transmits user data, high-layer control information, system information block (SIB), etc. The PUSCH transmits user data, high-layer control information, etc. In addition, the PBCH transmits the master information block (MIB).

[0231] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (DCI: Downlink Control Information) including scheduling information of at least one of the PDSCH and the PUSCH.

[0232] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0233] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0234] A search space may also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0235] Through PUCCH, uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (Scheduling Request (SR)) can also be transmitted. Through PRACH, random access preamble codes used to establish a connection with a cell can also be transmitted.

[0236] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link". In addition, various channels may be expressed without adding "Physical" to the beginning.

[0237] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0238] The synchronization signal may also be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0239] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal (UE-specific Reference Signal)).

[0240] (Base Station)

[0241] Fig.23 1 is a diagram showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission line interface 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission line interface 140 may each include more than one.

[0242] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks necessary for wireless communication. Part of the processing of each unit described below may also be omitted.

[0243] The control unit 110 controls the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0244] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission, reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0245] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are explained based on the common knowledge in the technical field involved in the present disclosure.

[0246] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0247] The transmitting / receiving antenna 130 can be constituted by an antenna such as an array antenna, which is described based on the common knowledge in the technical field to which the present disclosure relates.

[0248] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0249] The transmitting and receiving unit 120 may also form at least one of a transmitting beam and a receiving beam by using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), and the like.

[0250] The sending and receiving unit 120 (sending processing unit 1211) may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110, and generate a bit string to be sent.

[0251] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0252] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0253] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0254] The sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal, and obtain user data, etc.

[0255] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may perform radio resource management (Radio Resource Management (RRM)) measurement, channel state information (CSI) measurement, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement result may also be output to the control unit 110.

[0256] The transmission path interface 140 may also send and receive signals (backhaul signaling) between devices included in the core network 30 , other base stations 10 , etc., and acquire and transmit user data (user plane data) and control plane data for the user terminal 20 .

[0257] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0258] In addition, the transmitting and receiving unit 120 can also receive at least one of capability information indicating the supported full-power transmission mode (for example, mode 1, mode 2) and capability information (TPMI group capability information) of the Transmitted Precoding Matrix Indicator (TPMI) group that supports full-power transmission from the user terminal 20.

[0259] The control unit 110 may also be conceived as, based on a set of second TPMI groups defined as different from a set of first transmitted precoding matrix indicators (Transmitted Precoding Matrix Indicator (TPMI)) groups, the user terminal 20 generates TPMI group capability information, wherein the first transmitted precoding matrix indicator is used for terminals supporting a partially coherent codebook subset.

[0260] The transmitting and receiving unit 120 may also receive the TPMI group capability information corresponding to the TPMI group supporting full power transmission, which is transmitted from the user terminal 20 .

[0261] (User Terminal)

[0262] Fig.24 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each include more than one.

[0263] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0264] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which the present disclosure relates.

[0265] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 220.

[0266] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are explained based on the common knowledge in the technical field involved in the present disclosure.

[0267] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0268] The transmitting / receiving antenna 230 can be constituted by an antenna such as an array antenna, which is described based on the common knowledge in the technical field to which the present disclosure relates.

[0269] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0270] The transmitting and receiving unit 220 may also form at least one of a transmitting beam and a receiving beam by using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), and the like.

[0271] The sending and receiving unit 220 (sending processing unit 2211) may also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210, and generate a bit string to be sent.

[0272] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0273] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transmitting and receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, DFT processing may not be performed as the above-mentioned transmission processing.

[0274] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0275] On the other hand, the transmitting and receiving unit 220 (RF unit 222) may also perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230.

[0276] The sending and receiving unit 220 (receiving processing unit 2212) can also perform receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the obtained baseband signal, and obtain user data, etc.

[0277] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurement, CSI measurement, etc. based on the received signal. The measuring unit 223 may also 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 result may also be output to the control unit 210.

[0278] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0279] In addition, the transmitting unit (transmitting and receiving unit 220) may also transmit mode 2 capability information for indicating support for mode 2 of full power transmission. In addition, the mode 2 capability information may be renamed as mode 1 and mode 2 capability information for indicating support for mode 1 and mode 2, or may be renamed as mode 0 capability information for indicating support for mode 0 (UE capability 1).

[0280] The control unit 210 may also generate TPMI group capability information based on a set of second TPMI groups defined as different from a set of first transmitted precoding matrix indicators (Transmitted Precoding Matrix Indicator (TPMI)) groups, wherein the first transmitted precoding matrix indicator is used to support a terminal (or partially coherent UE) of a partially coherent codebook subset.

[0281] In addition, the second TPMI group set may also be a TPMI group set for terminals (or fully coherent UEs) supporting a fully coherent codebook subset.

[0282] The control unit 210 may also determine the correspondence between the bits (bit values) of the TPMI group capability information and the TPMI groups (and / or sets of groups) (for example, Figure 4 ,5 , 6A, 8A, 10A, 12, 14, 17). The control unit 210 may also refer to at least one table to determine the TPMI group corresponding to the PA structure it has.

[0283] In addition, the control unit 210 may not directly store or use these tables. The control unit 210 may perform the above-mentioned processing by any method as long as it can determine the correspondence relationship represented by these tables.

[0284] The sending unit (transmitting and receiving unit 220) may also send the TPMI group capability information corresponding to the TPMI group supporting full power transmission.

[0285] The control unit 10 may also assume that each group of the set of the second TPMI groups contains a TPMI representing a fully coherent codebook (for example, Figure 4 The control unit 210 may also assume that each group of the second TPMI group set is equivalent to Figure 4 TPMI group.

[0286] The control unit 210 may also assume that the set of the second TPMI groups includes a TPMI group (for example, G10) indicating that full-power transmission can be performed only by using a non-antenna selective precoder.

[0287] The control unit 210 may also assume that the set of the second TPMI groups does not include a TPMI group for indicating that full power transmission using only one port is supported but full power transmission using multiple ports is not supported (for example, Fig. 6A of G0).

[0288] When mode 2 is set, the transmission unit (transmission / reception unit 220) may transmit the uplink shared channel (PUSCH) in full power using a precoder based on the TPMI specified by DCI or the like.

[0289] The sending unit (sending / receiving unit 220) may also send information indicating a set of TPMI groups as the TPMI group capability information.

[0290] (Hardware Structure)

[0291] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using one device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, using wired, wireless, etc.) connected and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0292] Here, the functions include: judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, considering, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that plays a role in sending can also be called a transmitting unit, a transmitter, etc. No matter which one it is, as mentioned above, its implementation method is not particularly limited.

[0293] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.25 The base station 10 and the 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, and a bus 1007.

[0294] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0295] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or using other methods. In addition, the processor 1001 may also be implemented by one or more chips.

[0296] The various functions in the base station 10 and the user terminal 20 are implemented, for example, in the following manner: by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0297] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0298] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) can be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks can also be implemented in the same way.

[0299] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store an executable program (program code), a software module, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0300] The storage 1003 is a computer-readable recording medium, and may be composed of, for example, a flexible disk, a floppy (registered trademark) disk, an optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0301] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 120 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be physically or logically separated by the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0302] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0303] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for information communication. The bus 1007 may be configured using a single bus or different buses between the devices.

[0304] In addition, the base station 10 and the user terminal 20 may include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and may also use the hardware to implement a part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware.

[0305] (Variation Example)

[0306] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure can be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signal or signaling) can also be replaced with each other. In addition, a signal can also be a message. A reference signal can also be referred to as RS, and depending on the applied standard, it can also be referred to as a pilot, a pilot signal, etc. In addition, a component carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0307] A wireless frame may also be composed of one or more periods (frames) in the time domain. The one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may be a fixed duration (e.g., 1 ms) that is independent of a parameter set (numerology).

[0308] Here, the parameter set may also be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may also represent, for example, at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transmitter and receiver in the frequency domain, a specific windowing process performed by a transmitter and receiver in the time domain, and the like.

[0309] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0310] A time slot may also include multiple mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of a smaller number of symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0311] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by other names corresponding to each other. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0312] For example, one subframe may be referred to as a TTI, multiple consecutive subframes may be referred to as a TTI, and one time slot or one mini-time slot 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 the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini-time slot, etc. instead of a subframe.

[0313] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in units of TTI. In addition, the definition of TTI is not limited to this.

[0314] TTI can be a transmission time unit for data packets (transmission blocks), code blocks, code words, etc. after channel coding, and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which the transmission block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0315] In addition, when 1 time slot or 1 mini time slot is called TTI, more than 1 TTI (i.e., more than 1 time slot or more than 1 mini time slot) can be the minimum time unit of scheduling. In addition, the number of time slots (number of mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0316] A TTI with a duration of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-time slot, a sub-time slot, a time slot, etc.

[0317] In addition, long TTI (e.g., normal TTI, subframe, etc.) can also be replaced by a TTI with a duration exceeding 1 ms, and short TTI (e.g., shortened TTI, etc.) can also be replaced by a TTI with a TTI length shorter than that of long TTI and longer than 1 ms.

[0318] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0319] In addition, an RB may include one or more symbols in the time domain, and may be the length of one slot, one mini slot, one subframe, or one TTI. One TTI, one subframe, etc. may also be composed of one or more resource blocks, respectively.

[0320] In addition, one or more RBs may also be referred to as a physical resource block (physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0321] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0322] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB based on a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0323] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0324] At least one of the configured BWPs may be activated, and the UE may not assume that a specific signal / channel is transmitted or received outside the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may be replaced by "BWP".

[0325] In addition, the structures of the radio frame, subframe, time slot, mini-time slot and symbol mentioned above are only examples. For example, the number of subframes included in the radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in the time slot, the number of symbols and RBs included in the time slot or mini-time slot, the number of subcarriers included in the RB, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length and other structures can be changed in various ways.

[0326] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0327] The names used for parameters, etc. in this disclosure are not limiting in any way. Furthermore, the mathematical formulas, etc. using these parameters may also be different from the mathematical formulas explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, and thus the various names assigned to these various channels and information elements are not limiting in any way.

[0328] 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, code elements, and chips, etc. mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0329] In addition, information, signals, etc. may be output in at least one direction from a high layer to a low layer, and from a low layer to a high layer. Information, signals, etc. may also be input and output via multiple network nodes.

[0330] The input and output information, signals, etc. may be stored in a specific area (e.g., a memory) or managed using a management table. The input and output information, signals, etc. may also be overwritten, updated, or recorded. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0331] The notification of information is not limited to the method / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information in the present disclosure may be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC)) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0332] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0333] Furthermore, notification of specific information (for example, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (for example, by not notifying the specific information or by notifying other information).

[0334] The determination may be made by a value represented by one bit (0 or 1), by a true or false value (boolean) represented by true (true) or false (false), or by comparison of numerical values ​​(for example, comparison with a specific value).

[0335] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be construed broadly to mean instructions, instruction sets, codes, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, procedures, functions, etc.

[0336] In addition, software, instructions, information, etc. may be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, optical cable, twisted pair, and Digital Subscriber Line (DSL)), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0337] The terms "system" and "network" used in the present disclosure may be used interchangeably. "Network" may also refer to a device included in the network (eg, a base station).

[0338] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" may also be used interchangeably.

[0339] In the present disclosure, the terms "Base Station (BS)", "wireless 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" and the like are used interchangeably. The base station may also be referred to as a macro cell, a small cell, a micro cell, a pico cell and the like.

[0340] A base station can accommodate one or more (for example, 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 also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or all of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0341] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0342] A mobile station may also be referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handheld device, a user agent, a mobile client, a client, or some other appropriate terminology.

[0343] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may also be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0344] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, the user terminal 20 may be configured to have the functions of the above-mentioned base station 10. In addition, words such as "uplink" and "downlink" may also be replaced by words corresponding to communication between terminals (for example, "side". For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0345] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0346] In the present disclosure, with respect to operations set to be performed by a base station, sometimes, depending on the circumstances, they are also performed by its upper node. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal can obviously be performed by a base station, one or more network nodes other than the base station (for example, consider a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

[0347] Each method / implementation method described in this disclosure may be used alone, in combination, or switched during execution. In addition, the processing procedures, timings, flow charts, etc. of each method / implementation method described in this disclosure may be swapped in order as long as they are not contradictory. For example, with respect to the method described in this disclosure, the elements of various steps are presented in an illustrative order, and are not limited to the specific order presented.

[0348] The various modes and embodiments described in the present disclosure can be applied to 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)) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (Ultra Mobile Broadband (UMB)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), and systems using other appropriate wireless communication methods, and next-generation systems expanded based on them. In addition, multiple systems can also be applied in combination (for example, LTE or LTE-A, combination with 5G, etc.).

[0349] The phrase “based on” used in the present disclosure does not mean “based only on” unless explicitly described otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0350] Any reference to an element using the terms "first," "second," etc., used in this disclosure is not intended to be a comprehensive limitation on the number or order of these elements. These terms may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and second element does not mean that only two elements may be used or that the first element must be located before the second element in some form.

[0351] The term "determining" as used in this disclosure sometimes includes a variety of operations. For example, "determining" can be considered to be "judging", calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database or other data structure), ascertaining, etc.

[0352] In addition, "judgment (decision)" can also be regarded as "judgment (decision)" on receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), accessing (e.g., accessing data in a memory), etc.

[0353] In addition, "judgment (decision)" can also be regarded as "judgment (decision)" on resolving (resolving), selecting (selecting), choosing (choosing), establishing (establishing), comparing (comparing), etc. That is, "judgment (decision)" can be regarded as "judgment (decision)" on certain operations.

[0354] In addition, "judge (decide)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0355] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0356] The terms "connected", "coupled", or all their variations used in this disclosure mean all direct or indirect connections or couplings between two or more elements, and can include the situation where there are one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements can be physical, logical, or a combination thereof. For example, "connection" can also be replaced by "access".

[0357] In the present disclosure, when two elements are connected, it can be considered that they are "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, they are "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible light) region, etc.

[0358] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "bound" may also be interpreted in the same way as "different".

[0359] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, the term "or" as used in this disclosure does not constitute an exclusive logical or.

[0360] In the present disclosure, when an article is added due to translation, such as a, an, and the in English, the present disclosure may also include a case where the noun connected to the article is in plural form.

[0361] The invention disclosed herein is described in detail above, but it is obvious to those skilled in the art that the invention disclosed herein is not limited to the embodiments described in the disclosure. The invention disclosed herein can be implemented as a modification and alteration without departing from the purpose and scope of the invention determined by the description of the claims. Therefore, the description of the disclosure is for the purpose of illustration and does not bring any restrictive meaning to the invention disclosed herein.

Claims

1. A terminal having: A control unit, selecting at least one TPMI group supporting full power transmission from a set of first transmitted precoding matrix indicators (Transmitted Precoding Matrix Indicator (TPMI)) groups for terminals supporting a partially coherent codebook subset and a set of second TPMI groups for terminals supporting a fully coherent codebook subset; and The sending unit sends TPMI group capability information indicating the selected at least one TPMI group.

2. The terminal according to claim 1, wherein: The transmission unit transmits the TPMI group capability information indicating a combination of any one of the TPMI groups G0, G1, and G2 and any one of the TPMI groups G4, G5, and G6 as a TPMI group supporting full power transmission.

3. A wireless communication method of a terminal, comprising: A step of selecting at least one TPMI group supporting full power transmission from a set of first Transmitted Precoding Matrix Indicator (TPMI) groups for terminals supporting a partially coherent codebook subset and a set of second TPMI groups for terminals supporting a fully coherent codebook subset; and The step of transmitting TPMI group capability information indicating the selected at least one TPMI group.

4. A base station, comprising: a receiving unit, receiving TPMI group capability information sent from a terminal and indicating at least one transmit precoding matrix indicator group (TPMI group) selected by the terminal, The at least one TPMI group is selected from a set of first TPMI groups for terminals supporting a partially coherent codebook subset and a set of second TPMI groups for terminals supporting a fully coherent codebook subset.

5. A system having a terminal and a base station, The terminal has: A control unit, selecting at least one TPMI group supporting full power transmission from a set of first transmitted precoding matrix indicators (Transmitted Precoding Matrix Indicator (TPMI)) groups for terminals supporting a partially coherent codebook subset and a set of second TPMI groups for terminals supporting a fully coherent codebook subset; and a sending unit, configured to send TPMI group capability information indicating the selected at least one TPMI group, The base station has: A receiving unit receives the TPMI group capability information.

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