Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is characterized by being provided with: a receiving unit that receives downlink control information (DCI) when the terminal has eight antenna ports; the DCI includes a plurality of fields of at least one of precoding information and a layer digital field and a transmission precoding matrix indicator (TPMI) field for a physical uplink shared channel (PUSCH) transmission based on a codebook; and a control unit that controls uplink transmission on the basis of the DCI. According to one embodiment of the present disclosure, UL 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 rates and low latency (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, for UL transmission using more than 4 antenna ports, research has not yet progressed on how to determine the precoding matrix. For example, research has not yet progressed on the precoder for 1-8 layer transmission using 8 antenna ports. If this is not clear, there is a concern that the increase in communication throughput will be suppressed.

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

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present invention is characterized in that it has: a receiving unit, which receives downlink control information (DCI) when the terminal has 8 antenna ports, wherein the DCI includes multiple fields of precoding information and layer number fields and at least one of a transmit precoding matrix indicator (TPMI) field for transmission based on a codebook physical uplink shared channel (PUSCH); and a control unit, which controls uplink transmission based on the DCI.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, UL transmission using more than four 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 3This 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 5A This is a diagram showing an example of a table of the precoding matrix W for single-layer (rank 1) transmission using two antenna ports in Rel.16NR. Figure 5B This is a diagram showing an example of a table of precoding matrix W for 2-layer (rank 2) transmission using 2 antenna ports in Rel.16NR when transform precoding is invalid.

[0020] Figure 6 This is a diagram showing an example of the correspondence between the precoding information and the field value of the number of layers, the number of layers, and the TPMI in Rel.16NR.

[0021] Figure 7A-7C It is a diagram showing the SRI indication or the second SRI indication when the PUSCH is transmitted based on the codebook in Rel.17.

[0022] Figure 8 This is a diagram showing an example of an antenna layout of 8 antenna ports.

[0023] Figure 9A-9C It is a diagram showing a configuration example of an SRS resource set and SRS resources in the first embodiment.

[0024] Fig. 10A , Fig. 10B This is a diagram showing an example of the correspondence between the bit field of the DCI and the SRS resource indication when two SRS resource sets each have two 4-port SRS resources.

[0025] Fig.11A The diagram shows the correspondence between the bit field of the DCI and the SRS resource indication when two SRS resource sets each have two 4-port SRS resources. Fig. 11B The diagram shows the correspondence between the bit field of the DCI and the SRS resource set indication (set number) when two SRS resource sets each have two 4-port SRS resources.

[0026] Fig.12 is a diagram showing the correspondence between the SRS resource set in Option 2 and the SRS Resource Indication (SRI) field in the DCI.

[0027] Fig.13A , Fig. 13B This is a diagram showing an example of the correspondence between the bit field of the DCI and the SRS resource indication when each of the four SRS resource sets has two 2-port SRS resources.

[0028] Fig.14A The diagram shows the correspondence between the bit field of the DCI and the SRS resource indication when each of the four SRS resource sets has two 2-port SRS resources. Fig. 14B 1 is a diagram showing the correspondence between the bit field of the DCI and the SRS resource set indication when each of the four SRS resource sets has two 2-port SRS resources.

[0029] Fig.15 is a diagram showing the correspondence between the SRS resource set in Option 3 and the SRS Resource Indication (SRI) field in the DCI.

[0030] Fig.16A 1 is a diagram showing an example of a new precoder of three layers based on repeated use of an existing 4-port partially phased precoder. Fig. 16B 2 is a diagram showing an example of a 6-layer precoder based on 4 layers from one coherent group and 2 layers from another coherent group.

[0031] Fig.17A 2 is a diagram showing an example of a 4-layer precoder based on 2 layers from one coherent group and 2 layers from another coherent group. Fig. 17B is a diagram showing an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups.

[0032] Fig.18 It is a diagram showing examples of old fields / parameters and new fields / parameters in DCI and RRC.

[0033] Fig.19 This is a diagram showing an example of a resource set indication field in DCI (for example, added in Rel.17).

[0034] Fig. 20 1 is a diagram showing the correspondence between the TPMI index and the precoding matrix W in two-layer transmission using eight antenna ports when transform precoding is invalid.

[0035] Fig.21 1 is a diagram showing the correspondence between the TPMI index and the precoding matrix W in 6-layer transmission using 8 antenna ports when transform precoding is invalid.

[0036] Fig. 22It is a diagram showing an example of the association (or table) between the code point of a specific field of DCI (for example, precoding information and layer number field) and the layer number / TPMI index.

[0037] Figure 23A-23C This is a diagram showing an example of a precoder in Option 1 of the fourth embodiment.

[0038] Fig.24 It is a diagram showing an example of a table of option 1 according to the fourth embodiment.

[0039] Figure 25A-Figure 25D This is a diagram showing an example of a precoder in Modification Example 1.

[0040] Fig.26A , Fig.26B This is a diagram showing an example of a precoder in Option 1 of Modification Example 2.

[0041] Fig.27A , Fig.27B This is a diagram showing an example of a precoder in Option 2 of Modification Example 2.

[0042] Fig.28 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0043] Fig.29 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0044] Fig.30 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0045] Fig.31 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[0046] Fig.32 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0047] (Control of SRS and PUSCH Transmission)

[0048] 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)).

[0049] 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).

[0050] 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).

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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).

[0057] As the index of the above-mentioned specific reference signal, 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 (hereinafter also referred to as the precoding information field). 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., wherein the number of SRS ports is represented by the high-layer parameter "nrofSRS-Ports" set for the SRS resource specified by the SRI field.

[0065] 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).

[0066] 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.

[0067] 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.

[0068] 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".

[0069] 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.

[0070] (Determination of PUSCH Precoder in Transmission Based on Codebook (CB))

[0071] 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.

[0072] 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.

[0073] TRI and TPMI may also be specified through the precoding information and number of layers field of DCI. For simplicity, the precoding information and number of layers field is also referred to as the precoding information field.

[0074] 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").

[0075] 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.

[0076] 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.).

[0077] 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".

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.) for CB-based transmission.

[0082] Figure 1 : is a diagram showing an example of the relationship between the codebook subset and the TPMI index. Figure 1 This 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 Same).

[0083] Figure 1 The correspondence relationship between the TPMI index and the corresponding W (also 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.

[0084] exist Figure 1 In the case where the codebook subset (codebookSubset) is fullyAndPartialAndNonCoherent, for single-layer transmission, the UE is notified of any TPMI (TPMI index) 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.

[0085] exist Figure 1 In the case where a TPMI from 0 to 3 is notified, a non-coherent precoder is applied. In the case where a TPMI from 4 to 11 is notified, a partially coherent precoder is applied. In the case where a TPMI from 12 to 27 is notified, a fully coherent precoder is applied.

[0086] Figure 2 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.

[0087] according to Figure 2The TPMI notified to the UE for layer 2 transmission is from 0 to 21 (codebook subset is full and partial and incoherent), from 0 to 13 (codebook subset is partial and incoherent) or from 0 to 5 (codebook subset is incoherent).

[0088] 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 incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0089] 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 incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0090] Figure 5A A table corresponding to the precoding matrix W for single-layer (rank 1) transmission using 2 antenna ports in Rel.16NR. Figure 5B This corresponds to a table of precoding matrix W for 2-layer (rank 2) transmission using 2 antenna ports in Rel.16NR when transform precoding is invalid.

[0091] according to Figure 5A , the TPMI notified to the UE for 2-port single-layer transmission is from 0 to 5 (codebook subset is full and partial and non-coherent) or from 0 to 1 (codebook subset is non-coherent). In the case where the notified TPMI is from 0 to 1, a non-coherent precoder is applied. In the case where the notified TPMI is from 2 to 5, a fully coherent precoder is applied.

[0092] according to Figure 5B The TPMI notified to the UE for 2-port 2-layer transmission is from 0 to 2 (codebook subset is full and partial and non-coherent) or 0 (codebook subset is non-coherent).

[0093] 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.

[0094] 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.

[0095] 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).

[0096] 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).

[0097] In addition, from Figure 5A As can be seen from 5B, since there is no partially coherent precoder for transmission of two antenna ports, the partial and incoherent settings of the codebook subsets may not be applied to the two antenna ports.

[0098] (Size of the precoding information field)

[0099] 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.

[0100] 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.

[0101] Figure 6 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.

[0102] exist Figure 6 In the precoding information field, when the UE is set to a fully coherent (fullyAndPartialAndNonCoherent) codebook subset, it is 6 bits; when the UE is set to a partially coherent (partialAndNonCoherent) codebook subset, it is 5 bits; when the UE is set to a non-coherent (nonCoherent) codebook subset, it is 4 bits.

[0103] In addition, if Figure 6 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 6In 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 6 In 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.

[0104] 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.

[0105] Fig. 7A This indicates that ul-FullPowerTransmission is not set in Rel.17, or ul-FullPowerTransmission = fullpowerMode1, or ul-FullPowerTransmission = fullpowerMode2, or ul-FullPowerTransmission = fullpower and N SRS A diagram of the SRI indication or the second SRI indication during PUSCH transmission based on the codebook when =2. Figure 7B It shows that ul-FullPowerTransmission=fullpowerMode2 and N in Rel.17 SRS Figure 3 is a diagram of the SRI indication or the second SRI indication used for codebook-based PUSCH transmission when ∑ i = 3. Figure 7C It is shown in Rel.17 that ul-FullPowerTransmission=fullpowerMode2 and N SRS =4, a diagram of the SRI indication or the second SRI indication used for PUSCH transmission based on the codebook.

[0106] The SRI indication corresponds to the SRS resource indicator field of the DCI, and the second SRI indication corresponds to the second SRS resource indicator field of the DCI. The SRS resource set indicator field is 2 bits in the following cases: when txConfig=nonCodeBook, and there are two SRS resource sets associated with the purpose of "nonCodeBook" set by srs-ResourceSetToAddModList, or when txConfig=codebook, and there are two SRS resource sets associated with the purpose of "codebook" set by srs-ResourceSetToAddModList. If this is not the case, the SRS resource set indicator field is 0 bits.

[0107] In the case of high-level parameter txConfig = codebook, according to Figure 7A to Figure 7C , the SRS resource indicator field is "log2(N SRS )" bit. SRS N is the number of SRS resources configured in the SRS resource set indicated by the SRS resource set indicator field (if present). SRS This is the number of SRS resources set in the SRS resource set set by the higher layer parameter srs-ResourceSetToAddModList and associated with the usage of the higher layer parameter whose value is 'codeBook'.

[0108] <PUSCH SRS Configuration Based on Codebook>

[0109] In codebook-based transmission, PUSCH is scheduled by DCI format 0_0, DCI format 0_1, DCI format 0_2, or semi-fixedly configured. Only one or two SRS resource sets can be set in SRS-ResourceSetToAddModList with the purpose "codebook" of the high-level parameters of SRS-ResourceSet. In addition, only one or two SRS resource sets can be set in srs-ResourceSetToAddModListDCI-0-2 with the purpose "codebook" of the high-level parameters of SRS-ResourceSet.

[0110] In srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, when the purpose of the high-layer parameters of SRS-ResourceSet is set to "codebook" and two SRS resource sets are set, one or two SRIs and one or two TPMIs can also be given through two SRS resource indications and a DCI field indicating two precoding information and the number of layers.

[0111] The UE applies the indicated SRI(s) and TPMI(s) to one or more PUSCH repetitions according to the associated SRS resource sets of the PUSCH repetitions. When two SRS resource sets are configured via SRS-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2 and the purpose of the higher layer parameters of SRS-ResourceSet is set to "codebook", the UE does not expect different numbers of SRS resources to be configured in the two SRS resource sets.

[0112] In codebook based transmission, only one SRS resource may also be indicated from the SRS resource set based on the SRI. The maximum number of configured SRS resources for codebook based transmission is 2, except when the higher layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2". In the case where aperiodic SRS is configured for the UE, the SRS request field of the DCI triggers the transmission of aperiodic SRS resources.

[0113] Except when the high-level parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", when multiple SRS resources are set to "codebook" through SRS-ResourceSet, the UE expects that the high-level parameter "nrofSRS-Port" of the SRS-Resource within the SRS-ResourceSet is set to the same value for all these SRS resources.

[0114] When the higher layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", the following (1) to (3) are applied.

[0115] (1) The UE can configure one SRS resource or a plurality of SRS resources having the same number or different numbers of SRS ports in an SRS resource set whose usage is set to "codebook".

[0116] (2) When a plurality of SRS resources are set in an SRS resource set, a maximum of two different spatial relationships can be set for all SRS resources in an SRS resource set whose usage is set to "codebook".

[0117] (3) According to the capability of the UE, in the SRS resource set whose usage is set to "codebook", a maximum of two or four SRS resources are supported.

[0118] In the case of normal codebook-based PUSCH, one SRS resource set with two SRS resources with the same number of ports can be set. In the case of codebook-based PUSCH repetition (for multiple TRPs), two SRS resource sets with the same number of SRS resources can also be set separately. In the case of codebook-based "fullpowerMode2", one SRS resource set, SRS resources with the same number of ports or different number of ports can be set.

[0119] (Transmission with more than 4 antenna ports)

[0120] 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.

[0121] Figure 8 This is a diagram showing an example of an antenna layout with 8 antenna ports. Ng is the number of antenna groups. M is the number of antennas (or antenna elements) in the first dimension, and N is the number of antennas (or antenna elements) in the second dimension. The first dimension and the second dimension are, for example, the horizontal direction and the vertical direction. P is the number of polarization planes. When P=2, it becomes a cross-polarized antenna.

[0122] As UE capability information, the UE may also report antenna configuration information or coherence number.

[0123] Antenna layout is not limited to Figure 8 For example, the number of panels configured with antennas, the orientation of the panels, the coherence 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 related to Fig. 7A dG-H and dG-V respectively represent the horizontal interval and vertical interval between the centers of adjacent antenna groups.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] (analyze)

[0128] SRS resources for more than 4 antenna ports (eg, 8 ports) are configured and supported for codebook-based PUSCH. In the case of codebook-based PUSCH, SRS resources for more than 4 antenna ports (eg, 8 ports) may also be configured in consideration of the assumptions of UE antennas.

[0129] However, for UL transmission using more than 4 antenna ports (the number of antenna ports is greater than 4), research has not yet progressed on how to determine the precoding matrix. For example, research has not yet progressed on the precoder for 1-8 layer transmission using 8 antenna ports. If this point is not clear, there is a concern that the increase in communication throughput will be suppressed.

[0130] Therefore, the inventors of the present invention have conceived a method for appropriately performing UL transmission using more than four antenna ports.

[0131] 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.

[0132] In the present disclosure, "A / B" and "at least one of A and B" may also 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".

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. can also be overwritten with each other. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. can also be overwritten with each other.

[0139] 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 mutually.

[0140] In the present disclosure, TPMI and TPMI index may also be overwritten with each other. Port and antenna port may also be overwritten with each other. 8TX (8 transmit) and 8 ports may also mean 8 antenna ports. Port / antenna port may also mean port / antenna port for UL (e.g., SRS / PUSCH) transmission. In the present disclosure, SRS resource set and resource set may also be overwritten with each other. Coherent group and SRS resource set may also be overwritten with each other.

[0141] In the present disclosure, 8TX is mainly described, but it can also be applied to 5TX, 6TX, 7TX, or 8 or more TXs in the same way as the case of 8TX.

[0142] (Wireless Communication Method)

[0143] <First Embodiment>

[0144] When the UE supports UL (PUSCH) transmission of up to 8 layers and has 8TX (8 antenna ports), it can also send (report) UE capability information related to the UE's antenna configuration / antenna coherence for codebook-based PUSCH transmission to the network (base station), and receive settings related to SRS resource sets and SRS resources from the network through high-layer signaling / physical layer signaling based on the UE capability. The settings may also be different for each SRS resource set.

[0145] The first embodiment can also be applied to a single TRP. In the case of repeated transmission of PUSCH using multiple TRPs, the number of SRS resource sets can also be twice the number shown in this embodiment. A UE that supports more than 4 layers of PUSCH may not support more than 4 ports of SRS. Such a UE can also apply option 2 or 3.

[0146] [Option 1]

[0147] UE can also support 8-port SRS with the same structure as before ( Fig. 9A ). That is, usually, the UE may also be configured with a maximum of two SRS resources with the same number of ports (e.g., 8 ports) and one SRS resource set. The UE may also expect (assume) the setting of this option when reporting a specific antenna capability (e.g., fully coherent). The UE may also expect (assume) the setting of this option when reporting any antenna capability (e.g., full / partial / incoherent).

[0148] [Option 2]

[0149] The UE can also be configured with two SRS resource sets, each with a maximum of X (X = 1 / 2 / ...) 4-port SRS resources ( Fig. 9B ). Compared to Option 1, although there is no need to set 8-port SRS resources, the number of SRS resource sets is doubled. This option can also be expected (assumed) when the UE reports specific UE capabilities related to the antenna (for example, two coherent groups of UE antennas and four antenna ports per coherent group). The number of SRS resources in each resource set can be restricted to be the same or not.

[0150] [Option 3]

[0151] The UE can also be configured with four SRS resource sets, each with a maximum of X (X = 1 / 2 / ...) 2-port SRS resources ( Fig. 9C ). Compared to Option 1, although there is no need to set 8-port SRS resources, the number of SRS resource sets is quadrupled. This option can also be expected (assumed) when the UE reports specific UE capabilities related to the antenna (for example, four coherent groups of UE antennas and two antenna ports per coherent group). The number of SRS resources in each resource set can be restricted to be the same or not.

[0152] [Supplement to options 1 to 3]

[0153] The design principles of options 2 and 3 are the same as those of PUSCH repetitions for multiple TRPs. Multiple SRS resource sets (e.g., 2 or 4) are set for multiple UE coherent groups (e.g., 2 or 4 coherent groups, corresponding to 2 or 4 panels of the UE), which is the same as the setting of 2 SRS resource sets for 2 TRPPUSCH repetitions. In addition, as described in "SRS setting for PUSCH based on codebook", when the high-level parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", in options 1 to 3, one or more SRS resources with the same or different number of ports may also be set in each SRS resource set. In order to perform codebook-based PUSCH transmission, the UE may also send new UE capabilities for setting different SRS resource sets.

[0154] Similarly, in cases other than 8TX (for example, 5TX, 6TX, 7TX), the UE is configured so that the multiplication result of the number of SRS resource sets and the number of antenna ports for SRS resources becomes a specific number (5, 6, 7).

[0155] According to the first embodiment, it is possible to appropriately configure the SRS resource set / SRS resource for the UE with 8TX.

[0156] <Second Embodiment>

[0157] This embodiment can be implemented in combination with the first embodiment. Option 2 or 3 shown in this embodiment represents option 2 or 3 of the first embodiment.

[0158] [SRS resource indicator field]

[0159] In order to perform codebook-based PUSCH, when multiple SRS resource sets are set to option 2 or 3 of the first embodiment, there may be multiple SRS resource indication (SRS resource indicator) fields in DCI (DCI format 0_1 / 0_2). The number of SRS resource indication fields may be the same as the number of configured SRS resource sets.

[0160] When option 2 is set, there may be two SRS resource indication fields, each corresponding to an SRS resource indication in an SRS resource set. When option 3 is set, there may be four SRS resource indication fields, each corresponding to an SRS resource indication in an SRS resource set.

[0161] As another example, regardless of whether Option 2 or Option 3 is applied, the number of SRS resource indication fields may be one. One SRS resource indication field indicates one SRI for the first SRS resource set and another SRI for the second SRS resource set. The UE may also be configured with a mapping between SRS resource indication code points and SRS resources for each SRS resource set through RRC / MAC CE. The number of SRS resource indication fields may be fixed or configured through higher layer signaling.

[0162] Each field may also indicate the SRS resources in the corresponding resource set. Alternatively, each field may indicate "zero SRS resources from a resource set" (the SRS resources in the SRS resource set are 0). In the case where a field indicates "zero SRS resources from a resource set", it also means the rank / layer of the scheduled PUSCH, which affects Figure 6 Explanation of the "Precoding Information and Number of Layers" table.

[0163] [SRS resource set indication (SRS resource set indicator) field]

[0164] The SRS resource set indication field of the DCI may also be used for at least one of the following: the number of resource sets indicated, the index of the resource set indicated, and the order of the resource sets when multiple resource sets are indicated.

[0165] When Option 2 is set, the SRS resource set indication may indicate whether one resource set or two resource sets are indicated. When one resource set is indicated, either the first resource set or the second resource set may be indicated.

[0166] When option 3 is set, the SRS resource set indication may also indicate whether it indicates 1 set, 2 sets, 3 sets, or 4 sets. When x resource sets are indicated, the corresponding x resource set indices may also be indicated.

[0167] Preferably, each field of "SRS resource indication" can indicate "zero SRS resource from a resource set".

[0168] In the case where the indicated resource set index is predefined by a specific rule, the resource set index may not be explicitly indicated. Alternatively, when indicating one resource set, it always means the first resource set, and when indicating two resource sets, it always means the first resource set and the second resource set.

[0169] Since the indication of several resource sets means the rank / layer of the scheduled PUSCH, it may affect Figure 6 Explanation of the table of "Precoding information and number of layers".

[0170] The SRS resource indication field and SRS resource set field of this embodiment can also be applied in the same manner as the case of PUSCH repetition in multiple TRPs of Rel.17. Figure 7A to Figure 7C The SRS resource indication field can also be applied to UL transmission of 8TX.

[0171] The UE may also send (report) UE capability information indicating whether multiple SRS resource indication fields are supported. The UE may also send UE capability information related to the number of SRS resource indication fields.

[0172] [Example of table indicating SRS resource in Option 2]

[0173] An example of a table of SRS resource indication and SRS resource set indication when Option 2 of the first embodiment is applied will be described. Fig. 10A , Fig. 10B This is a diagram showing an example of the correspondence between the bit field of the DCI and the SRS resource indication when two SRS resource sets each have two 4-port SRS resources.

[0174] exist Fig. 10A In the case where the two fields of the SRS resource indication are '1' and '1', the second SRS resource of the first resource set (SRI=1) and the second SRS resource of the second resource set (SRI=1) are indicated. Fig. 10A In the case where the two fields of the SRS resource indication are '0' and '1', it means indicating a first SRS resource of the first set (SRI=0) and a second SRS resource of the second resource set (SRI=1).

[0175] exist Fig. 10B In the case where the two fields of the SRS resource indication are '01' and '10', it means that the second SRS resource is indicated in the first resource set, and no SRS is indicated in the second resource set (Zero SRS resource from the set (none)). In this case, rank≤4 is indicated. In the case where the two fields of the SRS resource indication are '01' and '00', it means that the second SRS resource of the first resource set (SRI=1) and the first SRS resource of the second resource set (SRI=0) are indicated.

[0176] Fig.11A The diagram shows the correspondence between the bit field of the DCI and the SRS resource indication when two SRS resource sets each have two 4-port SRS resources. Fig. 11B The diagram shows the correspondence between the bit field of the DCI and the SRS resource set indication (set number) when two SRS resource sets each have two 4-port SRS resources.

[0177] Fig.11A and Fig. 10A is the same. Fig. 11B When the bit field of the SRS resource set indication in is "0", only one resource set (the set index is the first resource set) is indicated, and only the field of the SRS resource indication of the first resource set is valid for the UE. The UE can ignore the second field of the SRS resource indication. Fig. 11B When the bit field of the SRS resource set indication is "1", two resource sets are indicated, and the two fields of the SRS resource indication are valid for the UE.

[0178] Fig.12 FIG. 2 is a diagram showing the correspondence between the SRS resource set in Option 2 and the SRS resource indication (SRI) field in the DCI. Fig.12 As shown, SRS resource sets #1 and #2 correspond to SRS resource indication (SRI) fields #1 and #2, respectively.

[0179] [Example table of SRS resource indication in option 3]

[0180] An example of a table of SRS resource indication and SRS resource set indication when Option 3 of the first embodiment is applied will be described. Fig.13A , Fig. 13B This is a diagram showing an example of the correspondence between the bit field of the DCI and the SRS resource indication when each of the four SRS resource sets has two 2-port SRS resources.

[0181] exist Fig.13AIn the figure, when the four fields indicating the SRS resource are '1', '1', '0', '0', it means indicating the second SRS resource of the first resource set (SRI=1), the second SRS resource of the second resource set (SRI=1), the first SRS resource of the third resource set (SRI=0), and the first SRS resource of the fourth resource set (SRI=0).

[0182] exist Fig. 13B In the case where the four fields of the SRS resource indication are '01', '10', '10', '00', it means indicating the second SRS resource (SRI=1) of the first resource set and the first SRS resource (SRI=0) of the fourth resource set, and there is no SRS indication in the second resource set and the third resource set (Zero SRS resource from the set (none)). In this case, it means rank ≤ 4.

[0183] Fig.14A The diagram shows the correspondence between the bit field of the DCI and the SRS resource indication when each of the four SRS resource sets has two 2-port SRS resources. Fig. 14B 1 is a diagram showing the correspondence between the bit field of the DCI and the SRS resource set indication when each of the four SRS resource sets has two 2-port SRS resources.

[0184] Fig.14A and Fig. 13B is the same. Fig. 14B In the case where the SRS resource set indication is '00', only one resource set is indicated (the set index (set number) is the first resource set), and only the field of the SRS resource indication of the first resource set is valid for the UE. In this case, it also means rank≤2.

[0185] Fig.15 FIG. 1 is a diagram showing the correspondence between the SRS resource set in Option 3 and the SRS resource indication (SRI) field in the DCI. Fig.15 As shown, SRS resource sets #1 to #4 correspond to SRS resource indication (SRI) fields #1 to #4, respectively.

[0186] According to the second embodiment, when two (or four) SRS resource sets or 4-port (or 2-port) SRS resources are set, the UE can receive more appropriate indications through the SRS resource indication field or SRS resource set indication field of the DCI.

[0187] <New 8-port UL precoder>

[0188] A method of reusing an existing 2- or 4-port UL precoder to form a new 8-port UL precoder is described. Additionally, in each figure, W0 means a matrix of all zeros. The expressions of using the existing precoders W 4TX 、W 2TX , and W0 are also described.

[0189] [Example of two coherent groups]

[0190] For a UE with two coherent groups, 1 or 2 existing precoders W 4TX can also be reused to form a new 8-port precoder.

[0191] Fig.16A is a diagram showing an example of a new precoder with 3 layers based on the reuse of an existing 4-port partially coherent precoder. In Fig.16A , for example, the existing 3-layer precoder shown in Figure 3 is reused.

[0192] Fig. 16B is a diagram showing an example of a 6-layer precoder based on 4 layers from one coherent group and 2 layers from another coherent group. In Fig. 16B , for example, the existing 2-layer and 4-layer precoders shown in Figure 2 、 Figure 4 are reused.

[0193] [Example of four coherent groups]

[0194] In the case of a UE with four coherent groups, 1, 2, 3, or 4 existing precoders W 2TX can also be reused to form a new 8-port precoder.

[0195] Fig.17A is a diagram showing an example of a 4-layer precoder based on 2 layers from one coherent group and 2 layers from another coherent group. In Fig.17A , for example, the existing 2-layer precoder shown in Figure 5B is reused.

[0196] Fig. 17B is a diagram showing an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups. In Fig. 17B , for example, the existing 2-layer precoder shown in Figure 5B is reused.

[0197] <Rel.17 multi-TRP PUSCH repetition>

[0198] In Rel.17, two codebook / non-codebook SRS resources are set through RRC. In addition, two power control parameter sets are set through RRC. Two SRI fields, TPMI field, PTRS-DMRS field, and TPC field are indicated through DCI. In addition, the dynamic switching of single TRP / multiple TRPs is indicated by the new SRS resource set indication (SRS resource set indicator) field of DCI.

[0199] Fig.18 1 is a diagram showing examples of old fields / parameters (e.g., Rel.15 / 16) and new fields / parameters (e.g., those added in Rel.17) in DCI and RRC. Fig.18 As shown, the new field / parameter corresponds to TRP2. Thus, it is possible to correspond to multiple TRPs.

[0200] Fig.19 FIG. 1 is a diagram showing an example of a resource set indication field in DCI (for example, added in Rel. 17). Fig.19 As shown, single TRP / multiple TRPs are indicated by the SRS resource set indication, and are further indicated by the TRP (TRP1 / TRP2) to be used and the order.

[0201] <Analysis>

[0202] In the following embodiments, a plurality of fields of SRS resource indication (SRS resource indicator) and SRS resource set indication (SRS resource set indicator) are proposed.

[0203] Similar to multi-TRP PUSCH, when there are multiple coherent groups in the UE, instead of using one TPMI indication for 8TX, separate TPMI indications are used for each coherent group. For example, in a UE with two coherent groups (4 ports per group), two TPMI indications can be considered for 4TX respectively.

[0204] For example, a UE of 4 coherent groups (2 ports per group) can also receive four TPMI indications per 2TX. In this case, the TPMI indication can reuse the existing 2TX and 4TX codebooks and TPMI indexes. A coherent group of UEs for UL transmission of 8TX can also be regarded as the same as a TRP of the MTRP PUSCH function.

[0205] When designing a new 8TX precoder, a new TPMI index table for the 8TX precoder can be designed (for example, Fig. 20 , Fig.21) and the new "Precoding Information and Number of Layers" table (e.g., as described later Fig. 22 ). Alternatively, instead of designing a new table for the new 8TX precoder, it is also considered to reuse the existing table and indicate multiple fields, and the UE generates a new 8TX precoder based on the indication of multiple fields (refer to the third and fourth embodiments described later).

[0206] <TPMI Index Table>

[0207] Fig. 20 is a diagram showing the correspondence between the TPMI index and the precoding matrix W in 2-layer transmission using 8 antenna ports when transform precoding is invalid.

[0208] In the new TPMI index table, the TPMI index corresponds to the new 8TX precoder. In the third and fourth embodiments described later, for Fig. 20 the indication of the precoder with the same TPMI index = 0, only 1 field of "Precoding Information and Number of Layers" is sufficient.

[0209] Fig.21 is a diagram showing the correspondence between the TPMI index and the precoding matrix W in 6-layer transmission using 8 antenna ports when transform precoding is invalid.

[0210] In the third and fourth embodiments described later, in order to indicate the precoder with the same Fig.21 TPMI index = 0, 2 fields of "Precoding Information and Number of Layers" are required, and an example is shown in the fourth embodiment.

[0211] <Precoding Information and Number of Layers Table>

[0212] The association between the code points of specific fields of DCI and the number of layers / TPMI index for multiple codebook subsets in the case of supporting more than 4 antenna ports / layers in UL transmission is described (e.g., the Precoding Information and Number of Layers table).

[0213] In the case of supporting 8 antenna ports / layers in UL, the correspondence between at least a part of the code points of specific fields of DCI (or the bit fields / field indices mapped to the indices) and the number of layers / TPMI index can also be set commonly among multiple codebook subsets. That is, among at least a part of the code points of specific fields of DCI, the same number of layers / TPMI index can also correspond among multiple codebook subsets.

[0214] Fig. 22 is a diagram showing an example of the association (or table) between the code points of a specific field of DCI (e.g., the Precoding Information and Number of Layers field) and the number of layers / TPMI index.

[0215] In Fig. 22 , 8 antenna ports are shown, the transform precoder is disabled, and the maximum rank (eg, maxRank) is 2, 3, 4, 5, 6, 7, or 8. In addition, Fig. 22 It can also be applied when full power transmission (eg, ul-FullPowerTransmission) is not set, or full power mode 2 (eg, fullpowerMode2) is set, or full power (eg, fullpower) is set.

[0216] The bit size of the specific field of the DCI may be defined differently for each of the plurality of codebook subsets. In addition, the bit size may be defined / set differently in each codebook subset based on the maximum rank (eg, maxRank).

[0217] exist Fig. 22 In FIG. 1 , the case where the codebook subset is non-coherent (nonCoherent) and the number of code points corresponding to the number of layers / TPMI index (or, bit size) is less than that of other codebook subsets (e.g., partialAndNonCoherent / fullyAndPartialAndNonCoherent). In addition, the case where the codebook subset is partial and non-coherent (partialAndNonCoherent) and the number of code points corresponding to the number of layers / TPMI index (or, bit size) is less than that of other codebook subsets (e.g., fullyAndPartialAndNonCoherent) is shown.

[0218] When the codebook subset is non-coherent, one or more TPMI indices are defined for each layer. NC,i A TPMI index may also be mapped / set for i layers. NC,i It may also be the number of incoherent precoders (Precoder number) corresponding to the i-th layer.

[0219] In the case where the codebook subset is partialAndNonCoherent, in addition to the TPMI index corresponding to the non-coherent, the TPMI index corresponding to the partially coherent can also be defined for each layer. NC,i In addition, X PC,i A TPMI index may also be mapped / set for i layers. PC,i It may also be the number of partially coherent precoders corresponding to the i-th layer.

[0220] In the case where the codebook subset is fullyAndPartialAndNonCoherent, in addition to the TPMI index corresponding to the non-coherent and the TPMI index corresponding to the partially coherent, the TPMI corresponding to the fully coherent can also be defined for each layer. NC,i and X PC,i In addition to the TPMI index, X FC,i TPMI index. FC,i It may also be the number of fully coherent precoders corresponding to the i-th layer.

[0221] The number of TPMI indexes (or the number of precoders) supported for each number of layers may also be set separately. For example, as the number of layers increases, the number of TPMI indexes (or the number of precoders) supported may also be set to be smaller. In this case, the number of TPMI indexes supported may also be the same in some layers.

[0222] In this way, the code point corresponding to the number of layers / TPMI index in the codebook subset being non-coherent (nonCoherent) can also be applied (or set to be the same) in the codebook subset being partial and non-coherent (partialAndNonCoherent). In addition, the code point corresponding to the number of layers / TPMI index in the codebook subset being partial and non-coherent (partialAndNonCoherent) can also be applied (or set to be the same) in the codebook subset being fully and partially and non-coherent (fullyAndPartialAndNonCoherent).

[0223] In this way, when 8 antenna ports / layers are supported in UL, the correspondence between at least a part of code points of the specific field of DCI and the number of layers / TPMI index is commonly set in multiple codebook subsets. This can suppress the increase of the overhead of the specific field of DCI.

[0224] The number of layers and TPMI index are indicated to the UE through each code point (or field index) of a specific field of the DCI. The UE may also determine the number of layers / TPMI index (or precoding matrix) used in UL transmission based on the value of the code point of the specific field of the DCI. The base station may also indicate the number of layers / TPMI index (or precoding matrix) used in UL transmission to the UE through the code point of the specific field of the DCI.

[0225] Fig. 22The table shown may also be applied in specific situations. For example, when 8 antenna ports / Tx / layers are configured for UL transmission (e.g., PUSCH / SRS) via RRC / MAC CE / DCI, Fig. 22 In other cases, a table for 2 / 4 antenna ports (for example, a table defined before Rel.16) may also be applied.

[0226] In addition, Fig. 22 In the example, the combination of the number of layers and the TPMI index corresponds to the code point (or field index) of a specific field of the DCI, but the present invention is not limited thereto. The number of layers and the TPMI index may be separately corresponded (or separately indicated to the UE).

[0227] For 8 antenna ports, the number of TPMIs (or the number of precoders) supported in each layer (eg, layer i) is NC,i , X PC,i , X FC,i It can also be set through RRC / MAC CE. In this case, the bit size of a specific field of DCI (eg, precoding information and layer number field) can also be set to be the same as that of other antenna ports (eg, 4 antenna ports).

[0228] Alternatively, the bit size of a specific field of the DCI corresponding to 8 antenna ports and the bit size of a specific field of the DCI corresponding to other antenna ports (eg, 4 antenna ports) may also be separately (eg, differently) set.

[0229] in addition, Fig. 22 The table is shown for the case where the maximum rank is 2, 3, 4, 5, 6, 7, or 8 for 8 antenna ports, but is not limited thereto. The table may be defined / set separately for the case where the maximum rank is less than 8 for 8 antenna ports (for example, 2, 3, 4, 5, 6, 7). In this case, the table structure may be set to correspond to 2 or 3 codebook subsets.

[0230] <Third Embodiment>

[0231] When supporting UL (PUSCH) transmission of up to 8 layers and having 8TX (8 antenna ports), the UE may also receive the following DCI (e.g., DCI format 0_1 / 0_2): DCI for codebook-based PUSCH transmission including multiple fields of at least one of a precoding information and number of layers field and an extended TPMI field. The UE may also control UL transmission using 8TX based on the DCI.

[0232] At least one of a plurality of precoding information and layer number fields and the TPMI field may correspond to a plurality of coherent groups included in the terminal.

[0233] A UE with two coherent groups and 4 ports per group may also use two fields of the extended TPMI to indicate the TPMI of each coherent group or the rank of a predetermined PUSCH. The indicated TPMI and rank reuse the existing 4TX UL codebook and TPMI index table.

[0234] A UE with four coherent groups and two ports per group may also use four fields of the extended TPMI to indicate the TPMI of each coherent group or the rank of the scheduled PUSCH. The indicated TPMI and rank reuse the existing 2TX UL codebook and TPMI index table.

[0235] [Two related groups]

[0236] For a UE having (supporting) two coherence groups, the following two cases apply.

[0237] 《Scenario 1》

[0238] In the case where two “SRS resource indication” fields are indicated as two valid SRS resource indications, there are two fields of “precoding information and number of layers” (or “extended TPMI”) corresponding to the SRS resource indication.

[0239] Scenario 2

[0240] When only one valid "SRS resource indication" field is indicated for a certain SRS resource set and no SRS resource indication is indicated for other SRS resource sets, there is a valid "precoding information and number of layers" (or "extended TPMI") field corresponding to the SRS resource indicated for the corresponding SRS resource set.

[0241] The fields of the "Extended TPMI" can also reuse the existing "Precoding Information and Layer Number Table" for four antenna ports ( Figure 6 ) and / or the existing "TPMI Index" table for four antenna ports ( Figures 1 to 4 ).

[0242] [Four related groups]

[0243] Likewise, for a UE having (supporting) four coherence groups, the following two cases apply.

[0244] 《Scenario 1》

[0245] When four (or more) "SRS resource indication" fields are indicated as valid, there are four (or more) fields of "precoding information and number of layers" (or "extended TPMI") corresponding to each "SRS resource indication" field.

[0246] Scenario 2

[0247] When only one "SRS resource indication" field is indicated as a valid SRS resource for a certain SRS resource set and no SRS resources are indicated for other SRS resource sets, a "precoding information and number of layers" (or "extended TPMI") field corresponding to the SRS resource indicated for the corresponding SRS resource set is valid.

[0248] The fields of "Extended TPMI" can reuse the existing "Precoding Information and Layer Number" table for two antenna ports and / or the existing "TPMI Index" table for two antenna ports ( Figure 5A , Figure 5B ).

[0249] The UE may also transmit (report) UE capability indicating a plurality of fields supporting "precoding information and number of layers" (or "extended TPMI"). The UE may also transmit UE capability information indicating the number of the plurality of fields.

[0250] According to the third embodiment, the UE can appropriately control UL transmission even in a case with a plurality of coherent groups by using a plurality of fields (“precoding information and number of layers” or “extended TPMI”).

[0251] <Fourth Embodiment>

[0252] In the case of a UE having two coherent groups, when two "SRS resource indication" fields are valid, the following Option 1 (Options 1a to 1c) is considered.

[0253] Option 1

[0254] The two fields of "Extended TPMI" can reuse the table of the existing "Precoding Information and Number of Layers" field for four antenna ports ( Figure 6 ). That is, the UE may also use the same table as that used for the precoding information and layer number fields to determine the indication of the TPMI field. Therefore, one field indicates both the layer of the coherent group / SRS resource in the corresponding SRS resource set and the TPMI index.

[0255] Option 1a

[0256] The fields of "Extended TPMI" can also reuse the existing "Precoding Information and Number of Layers" table for four antenna ports. For example, the first field of "Extended TPMI" = 11 indicates "4 layers, TPMI = 0 (W4)" for the first coherent group. TX,4,0 )”. The second field of “Extended TPMI”=4 indicates “2 layers, TPMI=0 (W)” for the second coherent group. 4TX,2,0 )". According to these two fields, the 8TX codebook is as follows Fig.23A As shown. 4TX,i,j This means that the TPMI table for layer i transmission with TPMI index j is used for the 4TX precoder. 4TX,i,j and W 4TX,m,n There are no relationships or constraints.

[0257] Option 1b

[0258] One field of "Extended TPMI" can indicate only the entry of "4 layers". This can significantly reduce the bit size of this field, which is equivalent to indicating one TPMI index from the 4-layer TPMI table. In addition, another field of "Extended TPMI" can reuse the existing "Precoding Information and Number of Layers" table for 4 antenna ports. According to this field, the 8TX codebook is as follows Fig. 23B As shown. Since from all W 4TX,4,j Only one precoder is indicated, so the overhead can be reduced.

[0259] Option 1c

[0260] One field (the first field) of "Extended TPMI" can reuse the existing "Precoding Information and Number of Layers" table for four antenna ports. Another field can interpret the "Precoding Information and Number of Layers" table based on the indication of the first field. For example, if one "Extended TPMI" field = 9, TPMI = 5 in layer 2, then another field can indicate only from the entries of layer 1 and layer 2. According to this field, the 8TX codebook is as follows Fig.23C As shown. 4TX,i,j With W 4TX,m,n When there are certain constraints and relationships between them, it is assumed that m≤i.

[0261] Additionally, in each option, the scaling factor of the newly combined 8TX precoder may also be recalculated.

[0262] Option 2

[0263] The 2 fields of "Extended TPMI" can reuse the existing TPMI index table for 4 antenna ports ( Figure 1 to Figure 4 ). The layer information may also be indicated separately by two fields of layer indication, for example.

[0264] Option 2a

[0265] As with option 1a, there is no restriction or relationship between the two fields of "Extended TPMI" and the two fields of "Tier Indication".

[0266] Option 2b

[0267] Similar to Option 1b, 1 field of "Layer Indication" indicates only 4 layers, and 1 field of "Extended TPMI" indicates only 4 layers of precoders.

[0268] Option 2c

[0269] As with Option 1c, one field of "Tier Indication" is smaller than the other fields.

[0270] [Specific example]

[0271] Fig.24 : is a diagram showing an example of a table of Option 1 of the fourth embodiment. That is, Fig.24 Shows that the "Extended TPMI" is reused Figure 6 Example of a table.

[0272] When the second field of "Extended TPMI" is 4, 2 layers may also be indicated for the second SRS resource set / UE coherent group, and Fig.24 Precoder A.

[0273] When the first field of "Extended TPMI" is 11, 4 layers may be indicated for the first SRS resource set / UE related group, and Fig.24 Precoder B.

[0274] Then, after decoding the above two fields, the UE can also apply precoder C obtained by combining precoders A and B. This is similar to Fig.21 The new 8TX table shown is the same for TPMI = 0. In this case the scaling factors need to be recalculated.

[0275] According to the fourth embodiment, a precoder for 8TX UL transmission can be indicated using a new TPMI (extended TPMI) field.

[0276] <Fifth Embodiment>

[0277] In a UE with two coherent groups, when only one valid "SRS resource indication" is indicated for a certain SRS resource set and no SRS resource is indicated for other SRS resource sets, the precoding information and number of layers (or "extended TPMI") field may also become valid. The "extended TPMI" field can reuse the existing precoding information and number of layers table for the four antenna ports shown in the fourth embodiment ( Figure 6 ).

[0278] Therefore, one "SRS resource indication" field indicates both the coherent group / layer of the SRS resource of the corresponding SRS resource set and the TPMI index. In this case, only PUSCH≤4 layers are indicated.

[0279] <Modification 1>

[0280] In the above-mentioned <New 8-port UL precoder>, when the new 8TX precoder is formed by two 4TX precoders, the UE does not consider the phase adjustment (co-phasing) between the two coherent groups, and simply reuses the existing 4TX precoder. However, the UE can also implement the phase adjustment (e.g., 4 values ​​{1, -1, j, -j}) between the two coherent groups (4TX precoders) to determine the new 8TX precoder (corresponding to the precoder of 8 antenna ports) based on the two 4TX precoders. The new 8TX precoder can be as follows Fig.25A is expanded as shown.

[0281] In the case of a UE with four coherent groups, the new 8TX precoder based on two TX precoders can be Figure 25B to Figure 25D Expand as shown.

[0282] In addition, a phase adjustment function of two coherent groups may also be introduced to the UE.

[0283] <Modification 2>

[0284] In the above-mentioned <New 8-port UL precoder>, the reuse of the UL precoder of 2TX / 4TX is considered to form an incoherent / partially coherent precoder of 8TX. Further, if the structure of the fully coherent precoder of 8TX is considered, it is possible to reuse only the fully coherent 2TX / 4TX precoder and form a new 8TX precoder. The following options 1 and 2 can also be applied as the new 8TX precoder.

[0285] Option 1

[0286] The UE can also reuse a 4TX full phase interferometer encoder to form a new 8TX full phase interferometer encoder ( Fig.26A , Fig.26B). In this case, co-phasing may or may not be considered. In addition, the new scaling factor of the 8TX precoder may or may not be considered.

[0287] Option 2

[0288] The UE can also reuse multiple 4TX full-phase interferometer encoders to form a new 8TX full-phase interferometer encoder ( Fig.27A , Fig.27B ). In this case, co-phasing may or may not be considered. In addition, the new scaling factor of the 8TX precoder may or may not be considered.

[0289] The UE may also send UE capability information indicating support for the formation of a new 8TX fully correlated precoder based on the existing 2TX / 4TX UL precoder.

[0290] <Sixth Implementation Method>

[0291] Based on the third embodiment / fourth embodiment / variant 1, in a UE having two coherent groups, in the case where two fields of "extended TPMI" corresponding to each SRS resource of each set are indicated, an additional phase adjustment indication is required to indicate the phase adjustment of the two indicated precoders. The phase adjustment can be set by RRC / MAC or indicated by a new field of DCI format 0_1 / 0_2.

[0292] Similarly in the case of a UE with four coherence groups, one or more phase adjustments may also be indicated via RRC / MAC / DCI for co-phasing between different coherence groups.

[0293] The UE may also send (report) UE capability information related to phase adjustment (Phase Adjustment) between coherent groups.

[0294] The same example as in this embodiment can also be applied to a new scaling factor indication. That is, the phase adjustment in this embodiment can also be rewritten as a scaling factor.

[0295] <Supplement>

[0296] At least one of the above-mentioned implementation modes may also be applied only to UEs that report a specific UE capability or support the specific UE capability.

[0297] The specific UE capability may also indicate support for specific processing / operation / control / information regarding at least one of the above-mentioned embodiments.

[0298] 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, Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), and capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)).

[0299] 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)).

[0300] 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 information indicating activation of 8TX UL transmission, any RRC parameter for a specific version (e.g., Rel.18), etc.

[0301] 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.

[0302] (Note)

[0303] The following inventions are added to one embodiment of the present disclosure.

[0304] [Note 1]

[0305] A terminal having:

[0306] A control unit, in the case where the terminal has 8 antenna ports, controls the transmission of capability information related to at least one of antenna configuration and antenna coherence for codebook-based physical uplink shared channel (PUSCH) transmission; and

[0307] The receiving unit receives settings related to a sounding reference signal (SRS) resource set and an SRS resource based on the capability information.

[0308] [Note 2]

[0309] A terminal as described in Appendix 1, wherein:

[0310] The configuration includes a configuration indicating four SRS resource sets and a 2-port SRS resource, or a configuration indicating two SRS resource sets and a 4-port SRS resource.

[0311] [Note 3]

[0312] A terminal as described in Supplement 1 or Supplement 2, wherein:

[0313] The receiving unit receives downlink control information (DCI), the DCI including the same number of SRS resource indication fields as the number of the SRS resource sets.

[0314] [Note 4]

[0315] A terminal as described in any one of Notes 1 to 3, wherein:

[0316] The receiving unit receives downlink control information (DCI), wherein the DCI includes at least one of the number of the SRS resource sets, the index of the SRS resource sets, and the order of the resource sets.

[0317] (Note)

[0318] The following inventions are added to one embodiment of the present disclosure.

[0319] [Note 1]

[0320] A terminal having:

[0321] A receiving unit, in a case where the terminal has 8 antenna ports, receiving downlink control information (DCI), wherein the DCI includes a plurality of fields for codebook-based physical uplink shared channel (PUSCH) transmission, at least one of a precoding information and a layer number field and a transmit precoding matrix indicator (TPMI) field; and

[0322] A control unit controls uplink transmission based on the DCI.

[0323] [Note 2]

[0324] A terminal as described in Appendix 1, wherein:

[0325] At least one of the plurality of precoding information and layer number fields and the plurality of TPMI fields corresponds to a plurality of coherent groups possessed by the terminal, respectively.

[0326] [Note 3]

[0327] A terminal as described in Supplement 1 or Supplement 2, wherein:

[0328] The control unit uses the same table as that used for the precoding information and layer number field to determine the indication of the TPMI field.

[0329] [Note 4]

[0330] A terminal as described in any one of Notes 1 to 3, wherein:

[0331] The control unit performs phase adjustment between two coherent groups and determines a precoder corresponding to the eight antenna ports based on two precoders.

[0332] (Wireless Communication System)

[0333] 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.

[0334] Fig.28 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in an embodiment. The wireless communication system 1 (which may also be simply referred to as 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.

[0335] 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.

[0336] 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.

[0337] 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)).

[0338] 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.

[0339] 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).

[0340] 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.

[0341] Furthermore, in each CC, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0342] 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.

[0343] 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.

[0344] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application management (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), maintenance and operation management (Operation, Administration and Maintenance (Management) (OAM)) and other network functions (Network Functions (NF)). In addition, multiple functions may be provided by one network node. In addition, communication with an external network (e.g., the Internet) may also be carried out via a DN.

[0345] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0346] 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.

[0347] 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.

[0348] 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.

[0349] 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.

[0350] 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.

[0351] 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.

[0352] 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.

[0353] 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.

[0354] 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.

[0355] 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.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] 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).

[0360] (Base Station)

[0361] Fig.29 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.

[0362] 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.

[0363] 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.

[0364] 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.

[0365] 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.

[0366] 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.

[0367] 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.

[0368] 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.

[0369] 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.

[0370] 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.

[0371] 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.

[0372] 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 .

[0373] 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 .

[0374] 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.

[0375] 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.

[0376] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), 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.

[0377] 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 .

[0378] In the case where the terminal has 8 antenna ports, the control unit 110 may also control the reception of capability information related to at least one of the antenna configuration and antenna coherence, which is sent by a physical uplink shared channel (PUSCH) based on the codebook. The transmitting and receiving unit 120 may also send settings related to a sounding reference signal (SRS) resource set and an SRS resource based on the capability information.

[0379] In the case where the terminal has 8 antenna ports, the transmitting and receiving unit 120 may also transmit downlink control information (DCI), wherein the DCI includes multiple fields for codebook-based physical uplink shared channel (PUSCH) transmission, precoding information and layer number fields, and at least one of a transmit precoding matrix indicator (TPMI) field. The control unit 110 may also control the reception of the uplink transmitted based on the DCI.

[0380] (User Terminal)

[0381] Fig.30 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a 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.

[0382] 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.

[0383] 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.

[0384] 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.

[0385] 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.

[0386] 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.

[0387] 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.

[0388] 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.

[0389] 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.

[0390] 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.

[0391] 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.

[0392] 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), in order to transmit the channel using a DFT-s-OFDM waveform, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform the above-mentioned transmission processing without performing DFT processing.

[0393] The transmitting and receiving unit 220 (RF unit 222 ) may also 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 .

[0394] On the other hand, the transmitting and receiving unit 220 (RF unit 222) may perform amplification, filter processing (filtering processing), demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230.

[0395] For the obtained baseband signal, 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 and other receiving processing to obtain user data, etc.

[0396] 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.

[0397] 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 .

[0398] In the case where the terminal has 8 antenna ports, the control unit 210 may also control the transmission of capability information related to at least one of the antenna configuration and antenna coherence for codebook-based physical uplink shared channel (PUSCH). The transmitting and receiving unit 220 may also receive settings related to a sounding reference signal (SRS) resource set and an SRS resource based on the capability information.

[0399] The configuration may also include a configuration indicating four SRS resource sets and a 2-port SRS resource, or a configuration indicating two SRS resource sets and a 4-port SRS resource.

[0400] The transmitting and receiving unit 220 may also receive downlink control information (DCI) including the same number of SRS resource indication fields as the number of the SRS resource sets.

[0401] The transmitting and receiving unit 220 may also receive the following downlink control information (DCI): the DCI includes at least one of the number of the SRS resource sets, the index of the SRS resource set, and the order of the resource sets.

[0402] In the case where the terminal has 8 antenna ports, the transmitting and receiving unit 220 may also receive downlink control information (DCI), wherein the DCI includes multiple fields for codebook-based physical uplink shared channel (PUSCH) transmission, precoding information and layer number fields, and at least one of a transmit precoding matrix indicator (TPMI) field. The control unit 210 may also control uplink transmission based on the DCI.

[0403] At least one of the plurality of precoding information and layer number fields and the plurality of TPMI fields may correspond to a plurality of coherent groups included in the terminal, respectively.

[0404] The sending and receiving unit 220 may also use the same table as that used for the precoding information and layer number field to determine the indication of the TPMI field.

[0405] The control unit 210 may also perform phase adjustment between the two coherent groups and determine precoders corresponding to the eight antenna ports based on the two precoders.

[0406] (Hardware Structure)

[0407] 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.

[0408] 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.

[0409] 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.31 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0410] 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.

[0411] 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.

[0412] 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.

[0413] 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.

[0414] 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.

[0415] 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.

[0416] 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.

[0417] 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).

[0418] 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).

[0419] 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.

[0420] 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.

[0421] (Variation Example)

[0422] 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.

[0423] 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).

[0424] 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.

[0425] 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.

[0426] 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.

[0427] 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 interchangeable.

[0428] 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.

[0429] 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.

[0430] 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.

[0431] 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.

[0432] 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.

[0433] 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.

[0434] 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.

[0435] 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.

[0436] 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.

[0437] 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.

[0438] 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.

[0439] 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.

[0440] 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".

[0441] 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.

[0442] 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.

[0443] 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.

[0444] 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.

[0445] 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.

[0446] 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.

[0447] 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.

[0448] 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)).

[0449] 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).

[0450] 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).

[0451] 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.

[0452] 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.

[0453] 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.

[0454] 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.

[0455] 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.

[0456] 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.

[0457] 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.

[0458] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0459] 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.

[0460] 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.

[0461] 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.

[0462] 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.

[0463] Fig.32 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.

[0464] 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.

[0465] 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).

[0466] 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.

[0467] 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.

[0468] 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.).

[0469] 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.

[0470] 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.

[0471] 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).

[0472] 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.

[0473] 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)).

[0474] 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.

[0475] 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.

[0476] 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.

[0477] 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.

[0478] 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.

[0479] 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.

[0480] 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”.

[0481] 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.

[0482] 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".

[0483] 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)".

[0484] 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.

[0485] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0486] 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).

[0487] 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".

[0488] 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.

[0489] 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".

[0490] 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.

[0491] 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.

[0492] 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", "wide", "narrow", etc. (not limited to the original degree, comparative degree and superlative degree) can also be rewritten with each other. In addition, in the present disclosure, sentences meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. can also be rewritten with each other as expressions attached with "ith" (i is an arbitrary integer) without being limited to the original degree, comparative degree and superlative degree (for example, "highest" can also be rewritten with "i-th highest").

[0493] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may also be rephrased with each other.

[0494] 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 method 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 receiving unit, in the case where the terminal has 8 antenna ports, receives downlink control information, i.e., DCI, where the DCI includes a plurality of fields for codebook-based physical uplink shared channel, i.e., PUSCH transmission, at least one of a precoding information and a layer number field and a transmit precoding matrix indicator, i.e., a TPMI field; and A control unit controls uplink transmission based on the DCI.

2. The terminal according to claim 1, wherein: At least one of the plurality of precoding information and layer number fields and the plurality of TPMI fields corresponds to a plurality of coherent groups possessed by the terminal, respectively.

3. The terminal according to claim 1, wherein: The control unit uses the same table as that used for the precoding information and layer number field to determine the indication of the TPMI field.

4. The terminal according to claim 1, wherein: The control unit performs phase adjustment between two coherent groups and determines a precoder corresponding to the eight antenna ports based on two precoders.

5. A wireless communication method of a terminal, comprising: In the case where the terminal has 8 antenna ports, a step of receiving downlink control information, i.e., DCI, which includes a plurality of fields for codebook-based physical uplink shared channel, i.e., PUSCH transmission, a precoding information and layer number field, and at least one of a transmission precoding matrix indicator, i.e., TPMI field; and The step of controlling uplink transmission based on the DCI.

6. A base station, comprising: A transmitting unit, when the terminal has 8 antenna ports, transmits downlink control information (DCI), wherein the DCI includes a plurality of fields for codebook-based physical uplink shared channel (PUSCH) transmission, a precoding information and a layer number field, and at least one of a transmission precoding matrix indicator (TPMI) field; and The control unit controls reception of the uplink transmitted based on the DCI.

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