Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a control unit that, when a codebook subset indicating incoherence or partial coherence is set, determines a precoder on the basis of a codebook for transmission using more than four antenna ports; and a transmission unit that performs uplink full power transmission on the basis of the precoder. According to one embodiment of the present disclosure, UL full power transmission using more than four antenna ports 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 Telecommunication System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9 of the Third Generation Partnership Project (3GPP)).

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[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 Rel.15NR, up to 4 layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future NR, in order to achieve higher spectrum efficiency, support for UL transmission with more than 4 layers is being studied. For example, for Rel.18NR, the maximum 6-rank transmission using 6 antenna ports and the maximum 6 or 8-rank transmission using 8 antenna ports are being studied.

[0009] However, research on UL full-power transmission using more than 4 antenna ports (more than 4 antenna ports) has not progressed. For example, for the codebook for 1-8 layer transmission using 8 antenna ports, research on the control method of full-power transmission when the DCI specifies a non-coherent / partially coherent precoder has not progressed. If this point is not clear, there is a concern that the increase in communication throughput will be suppressed.

[0010] Therefore, the present disclosure will provide, as one of its objects, a terminal, a wireless communication method, and a base station capable of appropriately controlling UL full-power transmission using more than 4 antenna ports.

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present invention comprises: a control unit, which determines a precoder based on a codebook for transmission using more than four antenna ports when a codebook subset representing incoherence or partial coherence is set; and a transmission unit, which performs uplink full-power transmission based on the precoder.

[0013] Effects of the Invention

[0014] According to one embodiment of the present disclosure, UL full-power transmission using more than 4 antenna ports can be appropriately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of a table of precoding matrix W for single-layer (rank 1) transmission using 4 antenna ports in Rel.16NR when the transform precoder is invalid.

[0016] Figure 2 This is a diagram showing an example of a table of precoding matrix W for 2-layer (rank 2) transmission using 4 antenna ports in Rel.16NR when the transform precoder is invalid.

[0017] Figure 3 This is a diagram showing an example of a table of precoding matrix W for three-layer (rank 3) transmission using four antenna ports in Rel.16NR when the transform precoder is invalid.

[0018] Figure 4 This is a diagram showing an example of a table of precoding matrix W for 4-layer (rank 4) transmission using 4 antenna ports in Rel.16NR when the transform precoder is invalid.

[0019] Figure 5 This is a diagram showing an example of a UE configuration assumed by UE capabilities 1-3 associated with full-power transmission.

[0020] Fig. 6A as well as Figure 6B This is a diagram showing an example of the TPMI group.

[0021] Figure 7 This is a diagram showing an example of the correspondence between the field values ​​of precoding information and the number of layers, and the number of layers and TPMI in Rel.16NR.

[0022] Fig. 8A as well as Figure 8B This is a diagram showing an example of an antenna layout of 8 antenna ports.

[0023] Fig. 9 This is a diagram showing an example of an 8-transmission UL codebook proposed by the inventors of the present invention.

[0024] Fig. 10A as well as Fig. 10B This is a diagram showing the use of P in the existing Rel.15 / 16NR CSI-RS A diagram showing an example of a codebook for layer 1 CSI reporting for antenna ports.

[0025] Fig.11A as well as Fig. 11B This is a diagram showing the use of P in the existing Rel.15 / 16NR CSI-RS A diagram showing an example of a codebook for layer 1 CSI reporting for antenna ports.

[0026] Figures 12A-12D This is a diagram showing an example of a precoder capable of realizing full-power transmission according to the first embodiment.

[0027] Fig.13 1 is a diagram showing an example of an 8-transmission 1-layer UL codebook for Mode 1 UE according to the second embodiment.

[0028] Fig.14 This is a diagram showing an example of a TPMI group according to the third embodiment.

[0029] Fig.15A as well as Fig. 15BThis is a diagram showing an example of the correspondence between the field values ​​of precoding information and the number of layers, and the number of layers and TPMI in Rel.16NR.

[0030] Fig.16 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0031] Fig.17 This is a diagram showing an example of the structure of a base station involved in one embodiment.

[0032] Fig.18 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0033] Fig.19 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment.

[0034] Fig. 20 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0035] (Control of SRS and PUSCH Transmission)

[0036] In Rel.15NR, UE (user terminal, User Equipment (UE)) can also receive information (SRS setting information, such as parameters in the "SRS-Config" of the RRC control element) used in the transmission of a measurement reference signal (e.g., a sounding reference signal (SRS)).

[0037] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of the RRC control element).

[0038] An SRS resource set may also be associated with a specific number of SRS resources (or the specific number of SRS resources may be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0039] The SRS resource set information may also include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of the SRS.

[0040] Here, the SRS resource type may also represent any one of periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic CSI (Aperiodic SRS (A-SRS)). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0041] In addition, the purpose (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can also be, for example, beam management (beamManagement), codebook (codebook (CB)), noncodebook (noncodebook (NCB)), antenna switching, etc. SRS for codebook or non-codebook purposes can also be used to determine the precoder transmitted by the codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on SRI.

[0042] For example, in the case of codebook-based transmission, the UE may also determine the precoder (precoding matrix) for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0043] SRS resource information may also include SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, send comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), jump association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0044] The spatial relationship information of SRS (for example, "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a specific reference signal and SRS. The specific reference signal may also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and an SRS (for example, another SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0045] The spatial relationship information of SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0046] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may also be overwritten with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may also be overwritten with each other. In addition, the SRS index, SRS resource ID, and SRI may also be overwritten with each other.

[0047] The spatial relationship information of SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0048] When spatial relationship information related to SSB or CSI-RS and SRS is set for a certain SRS resource, the UE may also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS to transmit the SRS resource. In this case, the UE may also assume that the UE receive beam of the SSB or CSI-RS is the same as the UE transmit beam of the SRS.

[0049] When spatial relationship information related to another SRS (reference SRS) and the SRS (target SRS) is set for a certain SRS (target SRS) resource, the UE may also use the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS to transmit the target SRS resource. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0050] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0051] In Rel.15 / 16NR, when codebook-based transmission is used for PUSCH, the UE can also be configured with an SRS resource set with a maximum of 2 SRS resources for the purpose of the codebook through RRC, and one of the maximum 2 SRS resources is indicated through DCI (1-bit SRI field). The transmit beam of PUSCH is specified by the SRI field.

[0052] The UE may also determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information and the number of layers field (also referred to as the precoding information field for simplicity). The UE may also select a precoder from an uplink codebook for the same number of ports as the number of SRS ports based on the TPMI, the number of layers, etc., where the number of SRS ports is represented by the high-layer parameter "nrofSRS-Ports" set for the SRS resource specified by the SRI field.

[0053] In Rel.15 / 16NR, when non-codebook based transmission is used for PUSCH, the UE can also be configured with an SRS resource set with a maximum of 4 SRS resources for non-codebook use through RRC, and one or more of the maximum 4 SRS resources can be indicated through DCI (2-bit SRI field).

[0054] The UE may also determine the number of layers (transmission rank) used for the PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers used for the PUSCH. In addition, the UE may also calculate the precoder of the SRS resources.

[0055] In the case where a CSI-RS (also referred to as an associated CSI-RS) associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) is set by a higher layer, the transmit beam of the PUSCH can also be calculated based on (the measurement of) the set associated CSI-RS. Otherwise, the transmit beam of the PUSCH can also be specified by the SRI.

[0056] In addition, the UE may also be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission through a high-layer parameter "txConfig" indicating a transmission scheme. This parameter may also indicate a value of "codebook" or "non-codebook".

[0057] In the present disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may also refer to a PUSCH in which "codebook" is set as a transmission scheme for the UE. In the present disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may also refer to a PUSCH in which "non-codebook" is set as a transmission scheme for the UE.

[0058] (Determination of PUSCH Precoder in Transmission Based on Codebook (CB))

[0059] As described above, in the case of codebook (CB) based transmission, the UE may determine the precoder to be used for PUSCH transmission based on SRI, TRI, TPMI, and the like.

[0060] 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 (Resource Indicator) field (SRI field) of DCI, or by the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH.

[0061] TRI and TPMI can also be specified through the precoding information and layer number field (“Precoding information and number of layers” field) of DCI.

[0062] The UE may also report UE capability information related to the precoder type, and the precoder type based on the UE capability information is set from the base station through high-layer signaling. The UE capability information may also be information about the precoder type used by the UE in PUSCH transmission (for example, it may also be represented by the RRC parameter "pusch-TransCoherence").

[0063] The UE may also determine the precoder used in PUSCH transmission based on the information of the precoder type (e.g., RRC parameter "codebookSubset") included in the PUSCH configuration information notified by higher layer signaling (e.g., the "PUSCH-Config" information element of RRC signaling). The UE may also be configured with a subset of the PMI specified by the TPMI through codebookSubset.

[0064] In addition, the precoder type can also be specified by any one of fully coherent (full coherent, fully coherent), partially coherent (partial coherent) and non coherent (non coherent, non coherent) or a combination of at least two of them (for example, it can also be represented by parameters such as "fully And Partial And Non Coherent", "partial And Non Coherent", etc.).

[0065] For example, the RRC parameter "pusch-TransCoherence" indicating the UE capability may also indicate full coherence, partial coherence, or non-coherence. In addition, the RRC parameter "codebookSubset" may also indicate "fully And Partial And Non-Coherent", "partial And Non-Coherent", or "non-Coherent".

[0066] Full coherence may also mean that all antenna ports used in transmission are synchronized (which may also be expressed as being able to make the phases consistent, being able to perform phase control for each coherent antenna port, being able to appropriately apply a precoder for each coherent antenna port, 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 of the antenna ports used in transmission is not achieved.

[0067] In addition, a UE supporting a fully coherent precoder type may also be considered to support a partially coherent and non-coherent precoder type. A UE supporting a partially coherent precoder type may also be considered to support a non-coherent precoder type.

[0068] In the present disclosure, non-coherent UE, partially coherent UE, and fully coherent UE may also be mutually rewritten with UE having non-coherent capabilities, UE having partially coherent capabilities, and UE having fully coherent capabilities, respectively.

[0069] In addition, non-coherent UEs, partially coherent UEs, and fully coherent UEs can also rewrite with UEs whose codebook subsets are set as "non-coherent", "partial and non-coherent", and "fully and partial and non-coherent" through higher layers, respectively.

[0070] Incoherent UEs, partially coherent UEs, and fully coherent UEs may also mutually rewrite with UEs that can use incoherent codebooks, partially coherent codebooks, and fully coherent codebooks for transmission, respectively.

[0071] In the present disclosure, precoder type, coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc. are mutually rewritten.

[0072] The UE may determine the precoding matrix corresponding to the TPMI index obtained according to the DCI (eg, DCI format 0_1, the same below) sent by the scheduled UL based on multiple precoders (which may also be referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0073] Figure 1-Figure 4 : is a diagram showing an example of the relationship between the codebook subset and the TPMI index. Figure 1This corresponds to a table of precoding matrix W for single-layer (rank 1) transmission using 4 antenna ports in Rel.16NR when transform precoding (also referred to as transform precoder) is invalid. Figure 1 The corresponding W( Figure 2-Figure 4 Same).

[0074] Figure 1-Figure 4 The correspondence relationship between the TPMI index and the corresponding W (which may also be referred to as a table) is also referred to as a codebook. A part of the codebook is also referred to as a codebook subset.

[0075] exist Figure 1 In the case where the codebook subset (codebookSubset) is fullyAndPartialAndNonCoherent, for single-layer transmission, the UE is notified of any TPMI from 0 to 27. In addition, when the codebook subset is partialAndNonCoherent, for single-layer transmission, the UE is set to any TPMI from 0 to 11. When the codebook subset is nonCoherent, the UE is set to any TPMI from 0 to 3 for single-layer transmission.

[0076] Figure 2-Figure 4 These correspond to tables of precoding matrix W for 2-4 layer (rank 2-4) transmission using 4 antenna ports in Rel.16NR when transform precoding is invalid.

[0077] according to Figure 2 The TPMI notified to the UE for layer 2 transmission is from 0 to 21 (codebook subset is full and partial and non-coherent), from 0 to 13 (precoder type is partial and non-coherent) or from 0 to 5 (precoder type is non-coherent).

[0078] according to Figure 3 The TPMI notified to the UE for layer 3 transmission is from 0 to 6 (codebook subset is full and partial and non-coherent), from 0 to 2 (precoder type is partial and non-coherent) or 0 (precoder type is non-coherent).

[0079] according to Figure 4 The TPMI notified to the UE for 4-layer transmission is from 0 to 4 (codebook subset is full and partial and non-coherent), from 0 to 2 (precoder type is partial and non-coherent) or 0 (precoder type is non-coherent).

[0080] In addition, a precoding matrix in which only one element in each column is not 0 may also be referred to as a non-coherent codebook. A precoding matrix in which only a certain number (greater than 1, but not all elements in the column) of elements in each column are not 0 may also be referred to as a partially coherent codebook. A precoding matrix in which all elements in each column are not 0 may also be referred to as a fully coherent codebook.

[0081] Non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders, antenna port selection precoders, and the like. For example, a non-coherent codebook (non-coherent precoder) may also be referred to as a 1-port selection precoder, a 1-port port selection precoder, and the like. In addition, a partially coherent codebook (partially coherent precoder) may also be referred to as an x-port (x is an integer greater than 1) selection precoder, a x-port port selection precoder, and the like. A fully coherent codebook may also be referred to as a non-antenna selection precoder, a full-port precoder, and the like.

[0082] In addition, in the present disclosure, the partially coherent codebook may also correspond to the following codebook: a codebook (precoding matrix) corresponding to the TPMI specified by DCI for codebook-based transmission for a UE set with a partially coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent"), and a codebook after removing the codebook corresponding to the TPMI specified for a UE set with a non-coherent codebook subset (for example, RRC parameter "codebookSubset" = "nonCoherent") (that is, if it is a single-layer transmission with 4 antenna ports, then the codebook with TPMI = 4 to 11).

[0083] In addition, in the present disclosure, the fully coherent codebook may also correspond to the following codebook: from the codebook (precoding matrix) corresponding to the TPMI specified by DCI for codebook-based transmission for a UE set with a fully coherent codebook subset (for example, RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent"), the codebook corresponding to the TPMI specified for a UE set with a partially coherent codebook subset (for example, RRC parameter "codebookSubset" = "partialAndNonCoherent") is removed (that is, if it is a single-layer transmission with 4 antenna ports, the codebook with TPMI = 12 to 27).

[0084] (Full power UL transmission)

[0085] According to the Rel.15NR specification, the transmission power of PUSCH is equally distributed to each antenna port. When the UE uses multiple ports for codebook-based transmission, if a part of the codebook (specifically, partially coherent / incoherent codebook) is used, the transmission power is reduced (full power transmission is not possible) compared to the single-port case.

[0086] For example, in Figure 1 In the table, if the transmission power of the fully coherent codebook corresponding to indexes 12 to 27 is set to 1 (= (1 / 2) 2 *4), the transmission power of the partially coherent codebook corresponding to indexes 4 to 11 is 1 / 2 (= (1 / 2) 2 *2), the transmission power of the non-coherent codebook corresponding to index 0 to 3 is 1 / 4 (= (1 / 2) 2 *1).

[0087] Even when using a codebook, it is preferred to perform full-power UL transmission appropriately. In Rel.16NR, the following UE capabilities 1-3 associated with full-power UL transmission based on a codebook using multiple power amplifiers (Power Amplifiers (PAs)) are specified:

[0088] UE capability 1: Support (or have) a PA capable of outputting maximum rated power (full rated PA) in each transmit chain;

[0089] UE capability 2: None of the transmit chains supports the full rated PA;

[0090] UE capability 3: A subset (part) of the transmit chain supports the full rated PA.

[0091] In addition, it may also mean that a UE having at least one of the UE capabilities 1-3 supports full power of UL transmission. The UE may also report capability information indicating support for UL full power transmission capability to the network (e.g., base station) separately from UE capabilities 1-3. The UE may also be set by the network to support full power transmission.

[0092] Figure 5 This is a diagram showing an example of a UE configuration assumed by UE capability 1-3 associated with full-power transmission. Figure 5 Only PA and transmission antenna ports (which may also be rewritten as transmission antennas) are briefly shown as the configuration of UE. In addition, an example in which the number of PA and transmission antenna ports is 4 is shown, but the present invention is not limited to this.

[0093] In addition, P represents the maximum output power of UE [dBm], PPA represents the maximum output power of the PA [dBm]. In addition, P may be 23dBm in a UE of power class 3, or 26dBm in a UE of power class 2, for example. Although it is assumed in the present disclosure that P PA ≤P, but the embodiments of the present disclosure can also be applied to P PA >P situation.

[0094] The configuration of UE capability 1 is assumed to have high installation cost, but can use one or more arbitrary antenna ports for full power transmission. In addition, UE capability 1 may also indicate the capability of supporting mode 0.

[0095] Although the structure of UE capability 2 is expected to include only non-full-rated PAs and can be installed cheaply, full-power transmission cannot be performed even if only one antenna port is used, so it is required to control the phase, amplitude, etc. of the signal input to each PA.

[0096] 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 case, transmit antennas #0 and #2) and antenna ports that cannot transmit at full power (in this case, transmit antennas #1 and #3) are mixed.

[0097] 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.

[0098] In addition, it is being studied that the operation of a UE supporting UE capability 2 or 3 for full-power transmission is set to at least one of two modes (mode 1, 2).

[0099] Here, mode 1 may also be a mode in which the UE is configured so that one or more SRS resources included in an SRS resource set whose usage is "codebook" have the same number of SRS ports (for example, it may also be referred to as a first full-power transmission mode). A UE operating in mode 1 may also use all antenna ports (using a non-antenna selective precoder) for full-power transmission.

[0100] A UE operating in mode 1 may also be configured by the network to use a subset of TPMIs that combine ports within layer 1 for full power transmission. A new codebook subset may also be introduced only for rank values ​​that include a precoder that corresponds to the TPMI corresponding to "fullyAndPartialAndNonCoherent" defined in Rel.15NR and cannot be used for full power transmission.

[0101] On the other hand, mode 2 may also be a mode in which the UE is configured so that one or more SRS resources included in an SRS resource set with a usage of "codebook" have different numbers of SRS ports (e.g., 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 instead of all antenna ports for full-power transmission.

[0102] Alternatively, regardless of whether antenna virtualization is used, UEs operating in mode 2 transmit PUSCH and SRS in the same way. For mode 2 UEs, in order to support SRS resources for more than one port, a set of TPMIs for full power transmission may also be notified. In mode 2, 2 or 3 SRS resources may be set for each SRS resource set (in Rel.15NR, a maximum of 2).

[0103] Compared with Mode 2, Mode 1 has the advantage that the required SRI field size can be small (full power transmission can be performed with one SRS resource).

[0104] Compared with mode 1, mode 2 has the advantage of being able to dynamically switch between single-port transmission and multi-port transmission through DCI. In addition, since full-power transmission can be performed on 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.

[0105] The above modes 0, 1 and 2 may also be respectively referred to as full power modes 0, 1 and 2. Full power mode 0 is sometimes also simply referred to as full power.

[0106] In Rel.16NR, the UE may also report one or more of the UE capability information indicating support for mode 0 (ul-FullPwrMode-r16), the UE capability information indicating support for mode 1 (ul-FullPwrMode1-r16), and the UE capability information indicating support for mode 2 (ul-FullPwrMode2-MaxSRS-ResInSet-r16, ul-FullPwrMode2-SRSConfig-diffNumSRSPorts-r16, etc.).

[0107] In addition, the UE is studying reporting UE capability information (ul-FullPwrMode2-TPMIGroup-r16, also referred to as TPMI group capability information) about a TPMI set (also referred to as a TPMI group) associated with mode 2 and capable of full power transmission.

[0108] Fig. 6A as well as Figure 6B This is a diagram showing an example of the TPMI group. Fig. 6A The PA structure corresponding to the TPMI group and the precoding matrix (precoder) for each rank are shown when the number of transmit antenna ports is 4. When there are multiple precoders associated with the same rank and capable of full-power transmission, any of the multiple precoders can perform full-power transmission in accordance with the rank. The number of columns in each matrix can also represent the number of layers.

[0109] Figure 6B An example of a TPMI group assumed by a UE with four transmit antenna ports is shown. A non-coherent UE with four transmit antenna ports may correspond to one of G0-G3. In addition, a partially coherent UE with four transmit antenna ports may correspond to one of G0-G6.

[0110] In addition, the UE may also determine the mode for PUSCH transmission based on high-layer signaling (e.g., RRC signaling), physical layer signaling (e.g., DCI), or a combination thereof. In other words, the UE may also be set or indicated the mode for PUSCH transmission through high-layer parameters (e.g., UL full power transmission mode information (ul-FullPowerTransmission-r16) in PUSCH setting information (PUSCH-Config information element)).

[0111] When the UL full power transmission mode information set to the UE indicates fullpower, the UE may also perform PUSCH full power transmission in mode 0. When the UL full power transmission mode information set to the UE indicates fullpowerMode1, the UE may also perform PUSCH full power transmission in mode 1. When the UL full power transmission mode information set to the UE is fullpowerMode2, the UE may also perform PUSCH full power transmission in mode 2.

[0112] 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 includes the parameter UL full power transmission mode information (ul-FullPowerTransmission-r16) indicating full power transmission, the UE can also scale (e.g., multiply, divide) the linear value of the PUSCH transmission power determined based on the path loss, the transmit power control (Transmit PowerControl (TPC)) command, etc. by a certain coefficient s. This coefficient can also be called a power scaling coefficient.

[0113] The UE may also equally distribute the value obtained by scaling the linear value of the PUSCH transmission power using the coefficient s to the non-zero PUSCH antenna ports. The UE may also apply the determined (or assumed) coefficient s to the precoding matrix and transmit the PUSCH at full power.

[0114] For example, when each SRS resource of an SRS resource set used for a codebook has more than one SRS port, a UE that is set to mode 1 through UL full-power transmission mode information (also referred to as mode 1 UE) can also be derived as s = (number of non-zero PUSCH antenna ports / maximum number of SRS ports supported by the UE in one SRS resource).

[0115] Here, non-zero PUSCH antenna ports may refer to antenna ports with non-zero PUSCH transmission power, or antenna ports whose values ​​among the antenna ports transmitted are represented by a precoding matrix (codebook subset) are not zero (eg, 1, j).

[0116] For example, consider a Mode 1 UE that is assigned by DCI to Figure 4 In Rel.16NR, when the mode 1 UE is a non-coherent UE, it can also be assigned TPMI index = 13, in which case full power transmission can be implemented. In addition, when the mode 1 UE is a partially coherent UE, it can also be assigned TPMI index = 12-15, in which case full power transmission can be implemented.

[0117] A UE configured with mode 2 by the UL full power transmission mode information (also referred to as mode 2 UE) may also apply s=1 to the precoder corresponding to the TPMI (also referred to as full power TPMI) reported as the above TPMI group. Figure 6B The G4 partially coherent Mode 2 UE is specified by the DCI to perform Figure 4 The case of 4-port 1-layer transmission.

[0118] In this case, the DCI specifies Fig. 6A In the case of one of the TPMI indices 4-7 corresponding to the full-power TPMI of G4, the Mode 2 UE may also apply 1 / √(the number of non-zero PUSCH antenna ports of W) (in this case, 1 / √2) as the value of the amplitude of W corresponding to the TPMI index 4-7 (the coefficient part (1 / 2) of W) (in other words, instead of 1 / 2). In addition, the above s=1 is applied. Thus, the Mode 2 UE can implement full-power transmission with respect to the TPMI index 4-7.

[0119] In addition, for the mode 2 UE, the precoder corresponding to the remaining TPMI (remaining TPMI) other than the above-mentioned full-power TPMI can also be derived as s = (number of non-zero PUSCH antenna ports / number of SRS ports). Here, when only one SRS resource is set to an SRS resource set for the purpose of a codebook, the number of SRS ports may also be the number of SRS ports associated with the SRS resource. When more than one SRS resource is set to an SRS resource set for the purpose of a codebook, the number of SRS ports may also correspond to the number of SRS ports of the SRS resource represented by the SRI. In reporting the above Figure 6B The partially coherent mode 2UE of G4 is performed Figure 4 In the case of 4-port 1-layer transmission, non-full power transmission can be implemented for TPMI indexes 8-11 (same as Rel.15).

[0120] s=1 can also be applied to a UE to which mode 0 is set through UL full power transmission mode information (also referred to as mode 0 UE).

[0121] For example, consider a Mode 0 UE that is assigned by DCI to Figure 4 In the case of 4-port 1-layer transmission. In Rel.16NR, in this mode 0UE, when one of the non-coherent / partially coherent precoders (TPMI index = 0-11) is specified by DCI, 1 / √(the number of non-zero PUSCH antenna ports of W) is applied as the value of the corresponding amplitude of W (the coefficient part (1 / 2) of W) (1 in the case of non-coherent precoder and 1 / √2 in the case of partially coherent precoder). In addition, the above s=1 is applied.

[0122] (Size of the precoding information field)

[0123] As described above, the UE may also determine the TPMI and the number of layers (transmission rank) used for the PUSCH based on the precoding information field of the DCI (eg, DCI format 0_1 / 0_2) that schedules the PUSCH.

[0124] Regarding the codebook-based PUSCH, the number of bits of the precoding information field can also be determined (and can also be changed) based on the validity setting of the transform precoder used for PUSCH (for example, the high-level parameter transformPrecoder), the setting of the codebook subset used for PUSCH (for example, the high-level parameter codebookSubset), the setting of the maximum number of layers used for PUSCH (for example, the high-level parameter maxRank), the setting of the uplink full-power transmission for PUSCH (for example, the high-level parameter ul-FullPowerTransmission), the number of antenna ports used for PUSCH, etc.

[0125] Figure 7 This is a diagram showing an example of the correspondence between the field values ​​of precoding information and the number of layers and the number of layers and TPMI in Rel.16NR. The correspondence in this example is a correspondence for 4 antenna ports when the transform precoder is set to invalid, the maximum rank (maxRank) is set to 2, 3 or 4, and the uplink full power transmission is not set or is set to full power mode 2 (fullpowerMode2) or is set to full power (fullpower), but it is not limited to this. In addition, it is obvious that those skilled in the art can understand that the "bit field mapped to the index" shown in the figure represents the field value of the precoding information and the number of layers.

[0126] exist Figure 7 In the example, the precoding information field is 6 bits when the UE is configured with a fully And Partial And Non Coherent codebook subset, 5 bits when the UE is configured with a partially coherent codebook subset, and 4 bits when the UE is configured with a non Coherent codebook subset.

[0127] In addition, if Figure 7 As shown in FIG. 1 , the number of layers and TPMI corresponding to the value of a certain precoding information field may also be the same (common) regardless of the codebook subset set for the UE. Figure 7 In the example, the value of the precoding information field = 0-11 indicates that the number of layers and TPMI for fully and partial and non-coherent, partially coherent, and non-coherent codebook subsets may also be the same. Figure 7In the example, the value of the precoding information field = 0-31 indicates that the number of layers and TPMI for the fully And Partial And Non Coherent and partial And Non Coherent codebook subsets may also be the same.

[0128] In addition, for a non-codebook-based PUSCH, the precoding information field may also be 0 bits. In addition, for a codebook-based PUSCH for one antenna port, the precoding information field may also be 0 bits.

[0129] (Transmission with more than 4 antenna ports)

[0130] In Rel.15 / 16NR, up to 4 layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future wireless communication systems, in order to achieve higher spectrum efficiency, research is being conducted to support UL transmission with more than 4 layers. For example, for Rel.18NR, research is being conducted on maximum 6-rank transmission using 6 antenna ports, maximum 6 or 8-rank transmission using 8 antenna ports, etc.

[0131] Fig. 8A as well as Figure 8B This is a diagram showing an example of an antenna layout of 8 antenna ports. Fig. 8A An example in which eight antennas are arranged in one dimension (1dimensional (1D)) is shown. Figure 8B An example in which eight antennas are arranged in two dimensions (2dimensional (2D)) is shown. Fig. 8A This corresponds to an antenna structure having four cross-polarized antennas arranged in the horizontal direction. Figure 8B This corresponds to an antenna structure having two cross-polarized antennas arranged in the horizontal and vertical directions.

[0132] In addition, the numbers shown in the figure may also represent the numbers corresponding to the antenna ports of the antenna.

[0133] In addition, the antenna layout is not limited to this. For example, the number of panels configured with antennas, the orientation of the panels, the correlation of each panel / antenna (completely coherent, partially coherent, incoherent, etc.), the antenna array in a specific direction (horizontal, vertical, etc.), the polarized antenna structure (single polarization, cross polarization, the number of polarization planes, etc.) can also be used with Fig. 8A And the example of 8B is different.

[0134] In addition, after supporting the transmission of one codeword (CW) in one PUSCH in Rel.15 / 16 NR, the UE is studying the transmission of more than one CW in one PUSCH for Rel.18 NR. For example, support for 2 CW transmission for ranks 5-8, support for 2 CW transmission for ranks 2-8, etc. is being studied.

[0135] In addition, in Rel.15 and Rel.16 UEs, it is assumed that only one beam / panel is used for UL transmission at a certain time, but in Rel.17 and later, in order to improve UL throughput and reliability, simultaneous UL transmission (for example, PUSCH transmission) of multiple beams / multiple panels is being studied for TRPs greater than 1. In addition, simultaneous PUSCH transmission of multiple beams / multiple panels can correspond to PUSCH transmission with a number of layers greater than 4, or to PUSCH transmission with a number of layers less than 4.

[0136] In addition, a precoding matrix for UL transmission using more than 4 antenna ports (the number of antenna ports is greater than 4) is being studied. For example, a codebook for 8-port transmission (which may also be referred to as an 8TX UL codebook, etc.) is being studied.

[0137] like Figure 1-Figure 4 , 8 transmit UL codebooks may also include TPMI indexes corresponding to multiple codebook subsets, and a corresponding precoding matrix W for transmission of an i-th layer (i is an integer, for example, i=1, 2, ..., 8) using 8 antenna ports.

[0138] Fig. 9 This is a diagram showing an example of an 8-transmission UL codebook proposed by the inventors of the present invention.

[0139] Hereinafter, in the present disclosure, for the sake of simplicity, the non-coherent precoder, partially coherent precoder and fully coherent precoder are also simply referred to as NC (non coherent) precoder, PC (partial coherent) precoder and FC (full coherent) precoder, respectively.

[0140] In addition, hereinafter, in the present disclosure, for the sake of simplicity, the NC / PC / FC precoder for i-layer (i is an integer, i=1 for single layer) transmission used for n antenna ports (n is an integer) is also simply referred to as n-port i-layer NC / PC / FC precoder (n-port i-layer NC / PC / FC precoder).

[0141] Fig. 9The 8-transmission UL codebook includes X1 8-port layer-1 NC precoders, X2 8-port layer-1 PC precoders, and X3 8-port layer-1 FC precoders. In this example, it is assumed that X1 = 2, X2 = 4 (X3 will be described later) as the above parameters. In this example, the TPMI index = 0 - 1 corresponds to the NC precoder, the TPMI index = 2 - 5 corresponds to the PC precoder, and the TPMI index = 6 - 37 corresponds to the FC precoder.

[0142] The 8-port layer-1 NC precoder can also be selected from W = 1 / √8 * [1 0 0 0 0 0 0 0] T , 1 / √8 [0 1 0 0 0 0 0 0] T , …, 1 / √8 [0 0 0 0 0 0 0 1] T (T represents the transpose matrix. The same applies hereinafter) from these 8.

[0143] The 8-port layer-1 PC precoder can also be a port selection precoder of x ports among 8 ports (1 < x < 8). In this example, x = 2.

[0144] The 8-port layer-1 FC precoder can also be the precoder W of the DL type-I single-panel codebook in the existing Rel.15 / 16 NR for the number of CSI-RS antenna ports (P CSI-RS ) = 8 (more specifically, W i_{1，1}，i_{1，2}，i_{2} (1) ) described later.

[0145] First, the DL type-I single-panel codebook in the existing Rel.15 / 16 NR will be described.

[0146] Fig. 10A And Fig. 10B is a diagram showing an example of the codebook for layer-1 CSI reporting using P CSI-RS antenna ports in the existing Rel.15 / 16 NR. Fig. 10A The codebook corresponds to the codebook mode = 1. The codebook mode is set for the UE through the RRC parameter codebookMode.

[0147] Here, N1 and N2 respectively represent the number of antenna ports in the first dimension and the second dimension. For example, it can also be that N1 corresponds to the number of antenna ports in the vertical direction and N2 corresponds to the number of antenna ports in the horizontal direction, but the direction is not limited to this. N1 and N2 are set for the UE through the RRC parameters n1 - n2.

[0148] O1 and O2 can also respectively correspond to the upsampling factors (the upsampling rate in space) corresponding to N1 and N2.

[0149] The value of the precoding matrix indicator (PMI) reported by the UE to the base station (eg, using CSI reporting) corresponds to i 1，1 、i 1，2 and i2. 1，1 、i 1，2 And i2 corresponds to the precoder W. The precoder W corresponds to the matrix ν taking into account the first dimension and the second dimension mentioned above l，m .

[0150] Fig.11A as well as Fig. 11B This is a diagram showing the use of P in the existing Rel.15 / 16NR CSI-RS A diagram showing an example of a codebook for layer 1 CSI reporting for antenna ports. Fig.11A The codebook corresponds to codebook mode = 2 and N2>1. Fig. 11B The codebook corresponds to codebook mode = 2 and N2 = 1.

[0151] Codebook mode = 1 corresponds to the case where the same beam (e.g., the same spatial domain (SD) beam, the same spatial direction beam, the same direction beam) is applied to two different polarized waves, and only phase selection is considered for the two different polarized waves. Codebook mode = 2 corresponds to the case where both beam and phase selection are considered for two different polarized waves.

[0152] In addition, the 8-port 1-layer FC precoder can be the same as the precoder W in the existing Rel.15 / 16NR, or different (it can also be a precoder after extending / changing W).

[0153] In the existing Rel.15 / 16NR, the number of antenna ports for CSI-RS (P CSI-RS )=8 DL Type I single panel codebook precoder W (more strictly speaking, Fig. 10A , Fig.11A as well as Fig. 11B W l，m，n (1) ) In the case of the 8-port 1-layer FC precoder of the fourth embodiment, i may be used to specify the 8-port 1-layer FC precoder. 1，1 ,i 1，2 and i2 (or variables equivalent to them. The same applies later).

[0154] The TPMI index notified through DCI may also correspond to at least one of the following:

[0155] TPMI index corresponds to (means / is) i 1，1 、i 1，2 And the three indexes i2,

[0156] TPMI index corresponds to (means / is) with i 1，1 、i 1，2 and two of i2 (e.g., i 1，1 and 1，2 ) index, and the first index associated with i 1，1 、i 1，2 and the second index associated with the index of the remainder (e.g., i2) in i2,

[0157] TPMI index corresponds to (means / is) with i 1，1 、i 1，2 And the third index related to these three indexes i2.

[0158] In addition, 1，1 、i 1，2 and two of i2 (e.g., i 1，1 and 1，2 ) The corresponding relationship between the index and the first index, i 1，1 、i 1，2 and the corresponding relationship between the index of the remaining (e.g., i2) in i2 and the second index, i 1，1 、i 1，2 The correspondence between the three indexes i, i2 and the third index can be pre-defined through the specification or set / specified to the UE through RRC signaling / MAC CE.

[0159] For example, the third index can also be based on i 1，1 、i 1，2 and i2. The third index (TPMI index) = (I2*N2*O2)*a+I2*b+c can also be expressed as (i 1，1 ,i 1，2 , i2) = (a, b, c). Here, I2 is the number of possible values ​​that i2 can take for the object codebook (in Fig. 10A In the Fig.11A as well as Fig. 11B 16 in the figure).

[0160] In addition, N1, N2, codebook mode, etc. may also be configured for the UE using the UL codebook configuration (e.g., may also be referred to as the RRC information element ulCodebookConfig). The UL codebook configuration may also be included in at least one of the PUSCH configuration information (RRC information element PUSCH-Config) and the configuration grant configuration information (RRC information element ConfiguredGrantConfig) and notified to the UE.

[0161] We can also obtain X3 = N1*O1*N2*O2*I2. Fig. 9 In the example, it is assumed that (N1, N2) = (2, 2) is predefined or set to the UE, (O1, O2) = (2, 1) is predefined or set to the UE, and I2 = 4 is predefined or set to the UE, and is set to codebook mode = 1. In this case, X3 = 32.

[0162] In this case, TPMI index = 0 to X1-1 may represent the NC precoder, TPMI index = X1 to X1+X2-1 may represent the PC precoder, and TPMI index = X1+X2 or more may represent the FC precoder. TPMI index = X1+X2 may also represent the initial FC precoder (e.g., corresponding to (i 1，1 ,i 1，2 , i2)=(0,0,0) FC precoder). For example, corresponding to (i 1，1 ,i 1，2 , i2)=(a, b, c) can also be represented by TPMI index=X1+X2+(I2*N2*O2)*a+I2*b+c.

[0163] In addition, the precoder corresponding to a specific TPMI included in the 8-transmission UL codebook may also be set / updated / activated through RRC / MACCE (the correspondence relationship may also be updated).

[0164] In addition, for 8-transmission UL codebooks, a new correspondence between the value of the precoding information field and the number of layers and TPMI is being studied (for example, different from Figure 7 The corresponding relationship of the corresponding relationship) is specified.

[0165] However, research on UL full-power transmission using more than 4 antenna ports (more than 4 antenna ports) has not progressed. For example, research on a control method for full-power transmission when a codebook for 1-8 layer transmission using 8 antenna ports and a non-coherent / partially coherent precoder is specified by DCI has not progressed. If this point is not clear, there is a concern that the increase in communication throughput will be suppressed.

[0166] Therefore, the inventors of the present invention have conceived a method for appropriately performing UL full-power transmission using more than 4 antenna ports.

[0167] 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.

[0168] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0169] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operate, and operate may also be mutually rewritten.

[0170] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, fields, Information Element (IE), settings, etc. may also be mutually overwritten. In the present disclosure, Medium Access Control (MAC) Control Element (CE), update commands, activation / deactivation commands, etc. may also be mutually overwritten.

[0171] In the present disclosure, the high-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.

[0172] In the present disclosure, MAC signaling may also use, for example, MAC Control Element (MACCE), MAC Protocol Data Unit (PDU), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0173] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0174] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. may also be mutually overwritten. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may also be mutually overwritten.

[0175] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRS Resource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indicationstate (TCI state)) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten with each other.

[0176] In addition, the spatial relationship information identifier (Identifier (ID)) (TCI state ID) and the spatial relationship information (TCI state) can also be overwritten with each other. "Spatial relationship information" can also be overwritten with "a collection of spatial relationship information", "one or more spatial relationship information", etc. TCI state and TCI can also be overwritten with each other.

[0177] In the following embodiments, "plurality" and "two" may be replaced with each other.

[0178] The number of layers of PUSCH transmission in the following embodiments may be greater than 4 or less than 4. For example, PUSCH transmission of two CWs in the present disclosure may also be performed using a number of layers less than 4 (eg, 2). In addition, the maximum number of layers is not limited to more than 4, and may also be less than 4.

[0179] In addition, PUSCH transmission in the following embodiments may be based on the premise of using multiple panels or may not be based on the premise (it may also be applied regardless of the panels).

[0180] In the following embodiments, the number "8" may be rewritten as any number greater than 4 (eg, 6, 10, 12, 16, ...) or any number less than 4 (eg, 1, 2, 3, 4).

[0181] In the present disclosure, mode 0, 1 and 2 UE refer to UEs set with UL full power transmission mode information indicating fullpower, fullpowerMode1 and fullpowerMode2, respectively, but are not limited thereto. In the present disclosure, fullpower, fullpowerMode1 and fullpowerMode2, etc. may also be other names (e.g., fullpower-r17, fullpowerMode1-r17 and fullpowerMode2-r17, etc.). In addition, in the present disclosure, UL full power transmission mode information may not be ul-FullPowerTransmission-r16, but other parameters (e.g., ul-FullPowerTransmission-r17).

[0182] It is assumed that the UE performing full-power transmission in the following embodiments is a partially coherent / incoherent UE, but it may also be a UE set to another coherent type.

[0183] (Wireless Communication Method)

[0184] <First Embodiment>

[0185] The first embodiment involves full power transmission using 8 antenna ports for Mode 0 UEs.

[0186] Mode 0 UE may also transmit at full power by applying one or a combination of the following:

[0187] Fix the above scaling factor s to 1 (i.e., s=1),

[0188] ·Apply W after changing the amplitude value used for the incoherent / partially coherent precoder (the amplitude value of the precoding matrix W (the coefficient part (1 / √8, etc.))) to 1 / √(the number of non-zero PUSCH antenna ports of W).

[0189] Figures 12A-12D This is a diagram showing an example of a precoder capable of full-power transmission according to the first embodiment.

[0190] Specified by TPMI index Fig. 12A The 1-port selected precoder W shown is 1 / √8*[1 0 0 0 00 0 0] T In the case of , mode 0 UE may also apply W after rewriting 1 / √8 to 1 / √1=1, and perform full power transmission according to s=1.

[0191] Specified by TPMI index Fig. 12B The 2-port selection precoder shown is W = 1 / √8*[1 0 0 0 10 0 0] T In the case of , mode 0 UE may also apply W after rewriting 1 / √8 to 1 / √2, and perform full power transmission according to s=1.

[0192] In the case of being specified by the TPMI index Fig. 12C The 4-port selection precoder shown is W = 1 / √8*[1 0 1 0 10 1 0] T In the case of , mode 0 UE may also apply W after rewriting 1 / √8 to 1 / 2, and perform full power transmission according to s=1.

[0193] Specified by TPMI index Fig.12D The 6-port selection precoder shown is W = 1 / √8*[1 1 1 1 10 1 0] T In the case of , mode 0 UE may also apply W after rewriting 1 / √8 to 1 / √6, and perform full power transmission according to s=1.

[0194] According to the first embodiment described above, the mode 0 UE can appropriately perform full power transmission using the 8-transmission UL codebook.

[0195] <Second Embodiment>

[0196] The second embodiment involves full power transmission using 8 antenna ports for Mode 1 UEs.

[0197] Mode 1 UEs may also transmit at full power by applying one or a combination of the following:

[0198] Fix the above scaling factor s to 1 (i.e., s=1),

[0199] ·Use a precoder (supported (added) for full-power transmission) selected from the fully correlated precoders.

[0200] Mode 1 UE can decide the (additional) precoder supported for full-power transmission based on specific rules / UE capabilities, or it can be notified from the network using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels, or a combination thereof.

[0201] Mode 1 UE may also report information related to (additional) precoders supported for full power transmission as UE capability information. Since the more precoders supported, the greater the overhead of DCI used to notify the precoders, the number of supported precoders may also be limited.

[0202] For example, in Fig. 9 In the UL codebook for 8-port 1 layer, the (additional) precoder supported for full power transmission may also include one or more of W corresponding to TPMI indexes 6-37. In addition, the (additional) precoder supported for full power transmission may also include one or more predefined simple precoders (for example, W = 1 / √8*[1 1 1 1 1 1 1] T ).

[0203] A Mode 1 UE that is a partially coherent / incoherent UE may also perform full power transmission using the (additional) precoder supported for full power transmission.

[0204] For a codebook used for a specific layer, a precoder for full power transmission for mode 1 UEs may also be supported by adding a precoder to the original fully correlated precoder (e.g., associating with an unused TPMI index). For example, for a codebook used for layer 1, there may be only one precoder supported for full power transmission.

[0205] Fig.13 is a diagram showing an example of an 8-transmission 1-layer UL codebook for mode 1 UE according to the second embodiment. Fig. 9 The same points will not be repeated. Fig. 9 The difference is that the FC precoder only has TPMI indexes 6-7 (equivalent to X3=2).

[0206] As such, X3 is preferably determined to be able to express X1+X2+X3 with the same number of bits as that required to express X1+X2 (in other words, the size of the TPMI index is the same as that of a partially coherent UE that is not configured with mode 1 (cannot transmit at full power)). This can be expected to reduce the field size of the DCI.

[0207] Fig.13 W1 and W2 are 8-port 1-layer FC precoders. For example, Fig. 9 W i_{1，1}，i_{1，2}，i_{2} (1) It can also be a simple precoder with 8 ports (for example, W = 1 / √8*[1 11 1 1 1 1] T ).

[0208] According to the second embodiment described above, the Mode 1 UE can appropriately perform full power transmission using the 8-transmission UL codebook.

[0209] <Third Embodiment>

[0210] The third embodiment involves full power transmission using 8 antenna ports for Mode 2 UEs.

[0211] For the precoder corresponding to the TPMI reported as the TPMI group (also referred to as the full power TPMI), the mode 2 UE may also apply s=1. The mode 2 UE may also select W included in the 8-port UL codebook corresponding to the full power TPMI, and perform full power transmission by applying 1 / √(the number of non-zero PUSCH antenna ports of W) as the value of the amplitude of W (the coefficient part of W).

[0212] It is also possible to define TPMI groups for more than 4 antenna ports.

[0213] Fig.14 1 is a diagram showing an example of a TPMI group involved in the third embodiment. This example shows a PA structure and a precoding matrix (precoder) for each rank corresponding to the TPMI group when the number of transmit antenna ports is 8. When there are multiple precoders that can perform full-power transmission for the same rank, any of the multiple precoders can perform full-power transmission for the rank.

[0214] G0-GN (where N is an integer) may also be a TPMI group for non-coherent UEs with 8 transmit antenna ports.

[0215] G0-GN and Ga-Gx (x is a letter) may also be TPMI groups for partially coherent UEs with eight transmission antenna ports. In addition, the group name is an example and is not limited to this.

[0216] For example, consider the report Fig.14 A case where a Mode 2 UE of G0 is specified by DCI to perform 8-port 1-layer transmission. In this case, when a TPMI index corresponding to the full-power TPMI for G0 is specified by the DCI, instead of the value 1 / √8 of the amplitude of W corresponding to the TPMI index, the Mode 2 UE applies 1 / √(the number of non-zero PUSCH antenna ports of W) (in this case, 1). In addition, the above s=1 is applied. As a result, the Mode 2 UE can implement full-power transmission for the TPMI index.

[0217] In addition, considering reporting Fig.14 The case where a mode 2 UE of Ga is specified by DCI to perform 8-port 1-layer transmission. In this case, when a TPMI index corresponding to the full power TPMI for Ga is specified by the DCI, instead of the value 1 / √8 of the amplitude of W corresponding to the TPMI index, the mode 2 UE applies 1 / √(the number of non-zero PUSCH antenna ports of W) (in this case, 1 / √2). In addition, the above s=1 is applied. As a result, the mode 2 UE can implement full power transmission for the TPMI index.

[0218] According to the third embodiment described above, the mode 2 UE can appropriately perform full power transmission using the 8-transmission UL codebook.

[0219] <Fourth Embodiment>

[0220] The fourth embodiment relates to the size of the precoding information field.

[0221] [Other than Mode 1]

[0222] The size of the precoding information field for the correspondence relationship for 8 antenna ports when the transform precoder is set to invalid and the uplink full power transmission is not set or is set to full power mode 2 (fullpowerMode2) or is set to full power (fullpower) may also be determined (changed) based on the codebook subset. The size of this field may not depend on the maximum rank (maxRank) or may depend on the maximum rank.

[0223] [Mode 1]

[0224] First, the existing precoding information field of mode 1 of Rel.16NR is described.

[0225] Fig.15A 15B is a diagram showing an example of the correspondence between the field values ​​of precoding information and the number of layers, and the number of layers and TPMI in Rel. 16 NR. Fig.15AThe correspondence is a correspondence for 4 antenna ports when the transform precoder is set to invalid, the maximum rank (maxRank) is set to 2, and the uplink full power transmission is set to full power mode 1 (fullpowerMode1). Fig. 15B The correspondence is a correspondence for 4 antenna ports when the transform precoder is set to invalid, the maximum rank (maxRank) is set to 3 or 4, and the uplink full power transmission is set to full power mode 1 (fullpowerMode1).

[0226] for Fig.15A , Fig. 15B ,and Figure 7 In contrast, a UE supporting partially coherent / non-coherent is assigned a TPMI corresponding to a fully coherent precoder. Fig.15A , 15B It can be seen that one correspondence relationship (table) is used for the maximum rank = 2, and another correspondence relationship (table) is used for the maximum rank = 3 and 4.

[0227] The size of the precoding information field of the correspondence relationship for 8 antenna ports when the transform precoder is set to invalid and the uplink full power transmission is set to full power mode 1 (fullpowerMode1) can also be determined (changed) based on the codebook subset and the maximum rank. For one or more maximum rank values, the same correspondence relationship for 8 antenna ports can be specified, or different correspondence relationships can be specified. For multiple of the above correspondence relationships corresponding to one or more maximum rank values, the same additional precoder for 8 antenna ports can be supported, or different additional precoders can be supported.

[0228] In addition, regarding the correspondence relationship for 8 antenna ports, the additional precoder may be supported (used) for all layers 1 to 8, or may not be supported for some layers.

[0229] According to the fourth embodiment described above, even when full-power transmission is effective, the size of the precoding information field can be appropriately determined.

[0230] <Supplement>

[0231] In the above implementation, the 8-port 1-layer UL codebook is mainly described, but those skilled in the art can obviously understand that the present application specification also supports the same implementation for the 8-port m-layer UL codebook (m is an integer of m>1).

[0232] The UE may also be notified from the network of switching between 6 / 8-port full-power transmission and full-power transmission of less than 4 ports using physical layer signaling (e.g., DCI), higher-layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels, or a combination thereof.

[0233] In addition, at least one of the above-mentioned embodiments may also be applied only to UEs that report specific UE capabilities (UE capability) or support the specific UE capabilities.

[0234] The specific UE capability may also represent at least one of the following:

[0235] Supporting processing / operation / control / information related to at least one of the above embodiments,

[0236] Support for PUSCH / SRS / PUCCH transmission using more than 4 (e.g., 6, 8) antenna ports,

[0237] Support 8-port m-layer codebook,

[0238] Support 8-port m-layer NC / PC / FC precoder (m=1, 2, ...),

[0239] Support full power transmission (mode 0 / 1 / 2),

[0240] TPMI group supporting full power transmission mode 2,

[0241] Supports full power transmission using more than 4 antenna ports (mode 0 / 1 / 2),

[0242] Support for TPMI groups in full power transmit mode 2 using more than 4 antenna ports.

[0243] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (for example, cell, frequency band, BWP), capabilities for each frequency range (for example, FR1, FR2, FR3, FR4, FR5), and capabilities for each subcarrier spacing.

[0244] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across full-duplex modes (commonly regardless of the duplex mode) or capabilities for each duplex mode (for example, time division duplex (TDD) and frequency division duplex (FDD)).

[0245] In addition, at least one of the above-mentioned embodiments may also be applied when the UE is configured with specific information associated with the above-mentioned embodiments through high-layer signaling. For example, the specific information may also be configuration information for PUSCH using more than 4 antenna ports, full power transmission (mode 0 / 1 / 2) using more than 4 antenna ports, any RRC parameter for a specific version (e.g., Rel.18), etc.

[0246] In the case where at least one of the above-mentioned specific UE capabilities is not supported or the above-mentioned specific information is not set, the UE may also apply the operations of Rel.15 / 16, for example.

[0247] (Note)

[0248] The following inventions are attached to one embodiment of the present disclosure.

[0249] [Note 1]

[0250] A terminal having:

[0251] a control unit that, when a codebook subset indicating incoherence or partial coherence is set, determines a precoder based on a codebook for transmission using antenna ports greater than four; and

[0252] A sending unit performs uplink full-power transmission based on the precoder.

[0253] [Note 2]

[0254] A terminal as described in Appendix 1, wherein:

[0255] When mode 0 is set for the uplink full power transmission, the precoder is a port selection precoder.

[0256] [Note 3]

[0257] A terminal as described in Supplement 1 or Supplement 2, wherein:

[0258] When mode 1 is set for the uplink full-power transmission, the precoder is a non-port selective precoder.

[0259] [Note 4]

[0260] A terminal as described in any one of Notes 1 to 3, wherein:

[0261] When mode 2 is set for the uplink full-power transmission, the precoder is a precoder corresponding to a TPMI group for more than four antenna ports reported.

[0262] (Wireless Communication System)

[0263] 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.

[0264] Fig.16 1 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.

[0265] 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-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0266] 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.

[0267] 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 (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0268] The wireless communication system 1 may also include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured 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 configuration and number of each cell and user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as base stations 10.

[0269] 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).

[0270] 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 also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (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 to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0271] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0272] Multiple base stations 10 may also be connected via wired (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station (relay) may also be referred to as an IAB node.

[0273] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0274] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0275] 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 (UL), 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.

[0276] The radio access scheme may also be referred to as a waveform. In addition, 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.

[0277] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0278] In addition, 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 can also be used in the wireless communication system 1.

[0279] User data, high-layer control information, system information block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, master information block (MIB) can also be transmitted through PBCH.

[0280] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0281] 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 rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0282] 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.

[0283] 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 rewritten mutually.

[0284] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0285] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0286] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, 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. can also be transmitted.

[0287] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0288] 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).

[0289] (Base Station)

[0290] Fig.17 1 is a diagram showing an example of a structure of a base station involved in one 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 path interface (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 path interface 140 may each be provided with more than one.

[0291] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0292] The control unit 110 controls the entire base station 10. The control unit 110 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.

[0293] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and 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.

[0294] 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 (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the common knowledge in the technical field involved in the present disclosure.

[0295] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0296] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0297] 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.

[0298] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0299] The sending and receiving unit 120 (sending processing unit 1211), for example, 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 to generate a bit string to be sent.

[0300] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (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.

[0301] 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 .

[0302] 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 .

[0303] 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 (filtering processing), demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to obtain user data, etc.

[0304] 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 also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, 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 (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0305] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0306] 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 .

[0307] Furthermore, the transmitting and receiving unit 120 may transmit, to the terminal 20 , information on a codebook for transmission of a certain number of layers using antenna ports greater than four.

[0308] In the case where a codebook subset indicating non-coherence or partial coherence is set for the user terminal 20, the transmitting and receiving unit 120 may also receive an uplink full-power transmission based on a precoder (sent by the user terminal 20), wherein the precoder is determined based on the codebook.

[0309] (User Terminal)

[0310] Fig.182 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 transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided in one or more portions.

[0311] 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 be omitted.

[0312] 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.

[0313] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and 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 transmitted as signals, and forward them to the transmission and reception unit 220.

[0314] 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 described based on the common knowledge in the technical field involved in the present disclosure.

[0315] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0316] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0317] 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.

[0318] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0319] The sending and receiving unit 220 (sending processing unit 2211) can 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 to generate a bit string to be sent.

[0320] 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 (filtering 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.

[0321] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0322] The transmitting and receiving unit 220 (RF unit 222 ) may perform modulation, filter processing (filtering 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 .

[0323] On the other hand, the transmitting and receiving unit 220 (RF unit 222) may perform amplification, filter processing (filter processing), demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230.

[0324] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing (filtering 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 to obtain user data, etc.

[0325] 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 measurements, CSI measurements, 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 results may also be output to the control unit 210.

[0326] 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 .

[0327] Furthermore, when a codebook subset indicating incoherence or partial coherence is set, control unit 210 may determine a precoder based on a codebook for transmission using antenna ports greater than four.

[0328] The transmitting and receiving unit 220 may also perform uplink full power transmission based on the precoder (in other words, may also perform uplink transmission at full power). In addition, uplink full power transmission may also be full power transmission of PUSCH / PUCCH / SRS.

[0329] When mode 0 is set for the uplink full-power transmission, the precoder may be a port selection precoder.

[0330] When mode 1 is set for the uplink full-power transmission, the precoder may be a non-port selective precoder.

[0331] When mode 2 is set for the uplink full-power transmission, the precoder may be a precoder corresponding to (or included in) a TPMI group for more than four antenna ports to be reported.

[0332] (Hardware Structure)

[0333] 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 by a 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, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0334] 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, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method thereof is not particularly limited.

[0335] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.19 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0336] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0337] 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 may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0338] The functions of the base station 10 and the user terminal 20 are realized, for example, 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.

[0339] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also 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 above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0340] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0341] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), or other appropriate 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 executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0342] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0343] 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. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0344] 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).

[0345] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0346] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0347] (Variation Example)

[0348] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be rewritten with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0349] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of 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 also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0350] Here, the parameter set may also be a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent 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 filter processing performed by a transmitter and receiver in the frequency domain, a specific windowing processing performed by a transmitter and receiver in the time domain, and the like.

[0351] 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.

[0352] A time slot may also include multiple mini-slots. Each mini-slot may also 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 fewer 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.

[0353] 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 their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be replaced with each other.

[0354] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a 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 existing LTE, a period shorter than 1 ms (e.g., 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.

[0355] 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 TTI units. In addition, the definition of TTI is not limited to this.

[0356] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may 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 a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0357] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0358] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard 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 TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0359] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0360] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0361] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0362] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0363] 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.

[0364] 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 relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0365] 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.

[0366] At least one of the set 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 also be rewritten as "BWP".

[0367] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0368] 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.

[0369] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0370] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be 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.

[0371] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0372] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0373] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also 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.

[0374] 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, such as an RRC connection establishment (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 (MACControl Element (CE)).

[0375] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0376] The determination can be made by a value represented by a bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a specific value).

[0377] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0378] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, 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.

[0379] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0380] 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" can be used interchangeably.

[0381] In the present disclosure, terms such as "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", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0382] 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 the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0383] In the present disclosure, the base station sending information to the terminal may also be rewritten as the base station instructing the terminal to control / operate based on the information.

[0384] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0385] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or several other appropriate terms.

[0386] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a moving object, a moving object body, etc.

[0387] The mobile body refers to a movable object, and the moving speed is arbitrary, and of course it also includes the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, automatic two-wheeled vehicles (motorcycles), bicycles, connected cars, loading shovels, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trolleys, rickshaws, ships (ships and other watercrafts), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, balloons and objects carried on them, but are not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0388] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (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 when performing 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.

[0389] Fig. 20 1 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0390] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handlebar), and steers at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0391] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0392] The signals from the various sensors 50-58 include a current signal from a current sensor 50 for sensing the current of the motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a stepping amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a stepping amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and the like.

[0393] The information service unit 59 is composed of various devices such as a vehicle navigation system, an audio system, a speaker, a display, a television, and a radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 provides various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40 using information obtained from an external device via the communication module 60, etc.

[0394] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0395] The driving assistance system unit 64 is composed of various devices such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning locator (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., high-precision (High Definition (HD))) map, autonomous vehicle (Autonomous Vehicle (AV)) map, etc.), gyroscope system (e.g., inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS))), artificial intelligence (Artificial Intelligence (AI)) chip, AI processor, etc., for providing functions for preventing accidents before they happen or reducing the driver's driving load, and one or more ECUs for controlling these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 and realizes driving assistance function or autonomous driving function.

[0396] The communication module 60 can communicate with the microprocessor 61 and the components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 of the vehicle 40 via the communication port 63.

[0397] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0398] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted through the communication module 60 may also include information based on the above input.

[0399] The communication module 60 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) transmitted from an external device, and displays it to the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit for outputting information (for example, outputting information to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0400] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, and various sensors 50-58 of the vehicle 40 based on the information stored in the memory 62.

[0401] In addition, the base station in the present disclosure may also be rewritten as 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, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink", "downlink", etc. may also be rewritten as terms corresponding to communication between terminals (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0402] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0403] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0404] The various methods / implementations described in this disclosure may be used alone or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, timings, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0405] The various modes / implementations described in the present disclosure may also 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 (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 (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these enhancements, corrections, production or regulations, etc. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0406] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0407] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0408] The term "determining" used in the present disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0409] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0410] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0411] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0412] 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 maximum transmit power).

[0413] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0414] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0415] 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 "combined" may also be interpreted in the same manner as "different".

[0416] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0417] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0418] In the present disclosure, "below", "less than", "above", "more than", "equal to", etc. can also be rewritten with each other. In addition, in the present disclosure, sentences meaning "good", "bad", "big", "small", "high", "low", "early", "late", etc. can also be rewritten with each other (not limited to the original degree, comparative degree, superlative degree). In addition, in the present disclosure, sentences meaning "good", "bad", "big", "small", "high", "low", "early", "late", etc. can also be rewritten with expressions attached with "ith" (not limited to the original degree, comparative degree, superlative degree) (for example, "highest" can also be rewritten with "i-th highest").

[0419] The invention involved in the present disclosure is described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a control unit that, when a codebook subset indicating incoherence or partial coherence is set, determines a precoder based on a codebook for transmission using antenna ports greater than four; and A sending unit performs uplink full-power transmission based on the precoder.

2. The terminal according to claim 1, wherein: When mode 0 is set for the uplink full power transmission, the precoder is a port selection precoder.

3. The terminal according to claim 1, wherein: When mode 1 is set for the uplink full-power transmission, the precoder is a non-port selective precoder.

4. The terminal according to claim 1, wherein: When mode 2 is set for the uplink full-power transmission, the precoder is a precoder corresponding to a TPMI group pair of more than four antenna ports reported.

5. A wireless communication method of a terminal, comprising: The step of determining a precoder based on a codebook for transmission using antenna ports greater than four when a codebook subset indicating non-coherence or partial coherence is set; and The step of performing uplink full power transmission based on the precoder.

6. A base station, comprising: a transmitting unit, which transmits information related to a codebook for transmission of a certain number of layers using antenna ports greater than 4 to a terminal; and A receiving unit receives an uplink full power transmission sent based on a precoder when a codebook subset indicating non-coherence or partial coherence is set for the terminal, wherein: The precoder is determined based on the codebook.

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