Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a control unit that determines an 8-port partial phase intervention encoder configured on the basis of a partial precoder that is limited on the basis of at least a rank among 2-port precoders; and a transmission unit for performing uplink transmission based on the partial phase interference encoder of the 8 ports. 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 Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Release 8 and 9 of the Third Generation Partnership Project (3GPP (registered trademark))).

[0003] Successor systems to LTE (also known as, for example, the fifth generation mobile communication system (5G), 5G+ (plus), the sixth generation mobile communication system (6G), New Radio (NR), and 3GPP Rel. 15 and later) 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] Rel.15 NR supports up to 4 layers of uplink (UL) multi-input multi-output (MIMO) transmission. Future NRs are under study to support UL transmission with more than 4 layers to achieve higher spectral efficiency. For example, for Rel.18 NR, research is underway to support transmission with a maximum of 6 rank using 6 antenna ports, and transmission with a maximum of 6 or 8 rank using 8 antenna ports.

[0009] Furthermore, research is underway to reuse existing UL precoders to create new 8-port UL precoders. However, without specific restrictions on these existing precoders, the number of usable 8-port UL precoders becomes enormous. In this case, the overhead required to notify the UE of information specifying the precoder to be used increases, raising concerns about inhibiting increases in communication throughput.

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

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present disclosure includes: a control unit for determining an 8-port partially interfering precoder based on at least a portion of a 2-port precoder that is restricted based on rank; and a transmitting unit for performing uplink transmission based on the 8-port partially interfering precoder.

[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 four antenna ports when the transform precoder is invalid in Rel.16 NR.

[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 when the transform precoder is invalid in Rel.16 NR.

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

[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 when the transform precoder is invalid in Rel.16 NR.

[0019] Figure 5A This is a diagram showing an example of a table of precoding matrix W for single-layer (rank 1) transmission using 2 antenna ports in Rel.16 NR. Figure 5B This is a diagram showing an example of a table of precoding matrix W for two-layer (rank 2) transmission using two antenna ports when transform precoding is invalid in Rel.16 NR.

[0020] Figure 6 This diagram shows an example of the correspondence between the precoding information and layer number field values, the layer number, and the TPMI in Rel.16 NR.

[0021] 7A to 7C This is a diagram showing an SRI indication or a second SRI indication during codebook-based PUSCH transmission in Rel.17.

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

[0023] Figures 9A to 9C This is a diagram showing an example of implementation of 8-port transmission.

[0024] Figure 10A This diagram shows an example of a new three-layer precoder based on reuse of an existing four-port partially phased precoder. Figure 10B This diagram shows an example of a 6-layer precoder based on 4 layers from one coherent group and 2 layers from another coherent group.

[0025] Figure 11A This diagram shows an example of a four-layer precoder based on two layers from one coherent group and two layers from another coherent group. Figure 11B This diagram shows an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups.

[0026] Figure 12 Yes Figures 1 to 4 A diagram showing the number of existing 4-port precoders.

[0027] Figure 13 Yes Figures 5A to 5B A diagram showing the number of existing 2-port precoders.

[0028] Figure 14 This is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.

[0029] Figure 15 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0030] Figure 16 This is a diagram showing an example of the configuration of a user terminal according to one embodiment.

[0031] Figure 17 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.

[0032] Figure 18 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0033] (Control of SRS and PUSCH Transmission)

[0034] In Rel.15 NR, a terminal (user terminal, User Equipment (UE)) may also receive information (SRS configuration information, such as parameters in the "SRS-Config" RRC control element) used to transmit a measurement reference signal (e.g., a Sounding Reference Signal (SRS)).

[0035] 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, the "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, the "SRS-Resource" of the RRC control element).

[0036] An SRS resource set may also be associated with a specific number of SRS resources (or a 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).

[0037] 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 SRS usage.

[0038] Here, the SRS resource type can also represent any of periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), and aperiodic CSI (A-SRS). Furthermore, the UE can periodically (or periodically after activation) transmit P-SRS and SP-SRS, and transmit A-SRS based on the SRS request in the DCI.

[0039] In addition, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can also include beam management (beamManagement), codebook (CB), non-codebook (NCB), antenna switching, etc. The SRS for codebook or non-codebook purposes can also be used to determine the precoder for codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) transmission based on SRI.

[0040] For example, in the case of codebook-based transmission, the UE may determine the precoder (precoding matrix) for PUSCH transmission based on the SRI, the Transmitted Rank Indicator (TRI), and the 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 the SRI.

[0041] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission comb (transmission 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.), frequency hopping association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0042] The spatial relationship information of the SRS (for example, the "spatialRelationInfo" element of the RRC information element) can also indicate the spatial relationship information between a specific reference signal and the SRS. This specific reference signal can 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 (CSI-RS), and an SRS (for example, another SRS). The SS / PBCH block can also be called a synchronization signal block (SSB).

[0043] The spatial relationship information of the SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-mentioned specific reference signal.

[0044] In this disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSBRI) may be overwritten. Furthermore, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) may be overwritten. Furthermore, the SRS index, SRS resource ID, and SRI may be overwritten.

[0045] The spatial relationship information of the SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0046] When spatial relationship information related to an SSB or CSI-RS and SRS is configured for a certain SRS resource, the UE may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used to receive the SSB or CSI-RS. In this case, the UE may assume that the UE receive beam for the SSB or CSI-RS is the same as the UE transmit beam for the SRS.

[0047] When spatial relationship information between another SRS (reference SRS) and the target SRS (target SRS) is configured for a specific SRS (target SRS) resource, the UE may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as used to transmit the reference SRS. In other words, in this case, the UE may assume that the UE transmit beam for the reference SRS and the UE transmit beam for the target SRS are the same.

[0048] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a specific field (e.g., the SRS resource identifier (SRI) field). Specifically, the UE may also use the spatial relationship information of the SRS resources determined based on the value of the specific field (e.g., SRI) (e.g., the "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0049] In Rel.15 / 16 NR, when codebook-based transmission is used for PUSCH, the UE may be configured with an SRS resource set using the codebook, with up to two SRS resources, via RRC. The UE is instructed to use one of these up to two SRS resources via DCI (a 1-bit SRI field). The SRI field specifies the PUSCH transmit beam.

[0050] The UE may also determine the TPMI and 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 based on the TPMI, number of layers, etc. from an uplink codebook for the same number of SRS ports as indicated by the "nrofSRS-Ports" field of the higher layer parameter configured for the SRS resource specified by the SRI field.

[0051] In Rel.15 / 16 NR, for PUSCH, when non-codebook-based transmission is used, the UE may be configured through RRC with an SRS resource set having a maximum of four SRS resources for non-codebook purposes, and may be instructed to use one or more of the maximum four SRS resources through DCI (2-bit SRI field).

[0052] 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. Furthermore, the UE may also calculate the precoder for the SRS resources.

[0053] If the CSI-RS associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) (also referred to as the associated CSI-RS) is configured by higher layers, the PUSCH transmit beam can be calculated based on (measurement of) the configured associated CSI-RS. Otherwise, the PUSCH transmit beam can be specified using the SRI.

[0054] Alternatively, the UE can be configured to use codebook-based or non-codebook-based PUSCH transmission via the higher-layer parameter "txConfig," which indicates the transmission scheme. This parameter can also indicate a value of "codebook" or "non-codebook."

[0055] In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may also refer to a PUSCH with "codebook" configured as the transmission scheme to a UE. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may also refer to a PUSCH with "non-codebook" configured as the transmission scheme to a UE.

[0056] (PUSCH Precoder Determination in Codebook (CB) Transmission)

[0057] 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, etc.

[0058] SRI, TRI, TPMI, and other information can also be notified to the UE using Downlink Control Information (DCI). SRI can be specified using the SRS Resource Indicator field (SRI field) in the DCI or using the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" that configures a PUSCH grant.

[0059] TRI and TPMI can also be specified using the DCI's "Precoding information and number of layers" field. For simplicity, the "Precoding information and number of layers" field is also referred to as the "Precoding information field."

[0060] The UE may also report UE capability information related to the precoder type, and the base station may configure the precoder type based on the UE capability information through higher layer signaling. The UE capability information may 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").

[0061] The UE may also determine the precoder to use for PUSCH transmission based on the precoder type information (e.g., the RRC parameter "codebookSubset") included in the PUSCH configuration information notified via higher-layer signaling (e.g., the "PUSCH-Config" information element in RRC signaling). The UE may also be configured with a subset of the PMI specified by the TPMI via codebookSubset.

[0062] In addition, the precoder type can also be specified by any one of full coherence (full coherent, fullycoherent), partial coherent (partial coherent) and non coherent (non coherent) or a combination of at least two of these (for example, it can also be represented by parameters such as "full, partial and non coherent (fullyAndPartialAndNonCoherent)", "partial and non coherent (partialAndNonCoherent)").

[0063] For example, the RRC parameter "pusch-TransCoherence," which indicates UE capabilities, can also indicate full coherence (fullCoherent), partial coherence (partialCoherent), or non-coherent (non-coherent). Furthermore, the RRC parameter "codebookSubset" can also indicate "fullyAndPartialAndNonCoherent," "partialAndNonCoherent," or "non-coherent."

[0064] Full coherence can also mean that all antenna ports used for transmission are synchronized (which can also be expressed as being able to align phases, perform phase control for each coherent antenna port, and appropriately apply a precoder for each coherent antenna port). Partial coherence can also mean that some of the antenna ports used for transmission are synchronized, but these ports are not synchronized with the other ports. Incoherence can also mean that the antenna ports used for transmission are not synchronized.

[0065] 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.

[0066] In the present disclosure, precoder type, coherency, PUSCH transmission coherence, coherent type, coherent type, codebook type, codebook subset, codebook subset type, etc. may also be replaced with each other.

[0067] The UE may also determine a precoding matrix corresponding to the TPMI index obtained based on the DCI (eg, DCI format 0_1, the same applies hereinafter) scheduled for UL transmission from multiple precoders (also referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0068] Figure 1 ] is a diagram showing an example of the relationship between codebook subsets and TPMI indices. Figure 1 This table corresponds to the precoding matrix W for single-layer (rank 1) transmission using 4 antenna ports when transform precoding (also called transform precoder) is disabled in Rel.16 NR. Figure 1 The corresponding W ( Figure 2 Same).

[0069] Figure 1 The correspondence between TPMI indices and corresponding W (also referred to as a table) is also called a codebook. A portion of the codebook is also called a codebook subset.

[0070] exist Figure 1In the case where the codebook subset (codebookSubset) is full, partial, and non-coherent (fullyAndPartialAndNonCoherent), the UE is notified of any TPMI (TPMI index) from 0 to 27 for single-layer transmission. In addition, when the codebook subset is partialAndNonCoherent, the UE is configured with any TPMI from 0 to 11 for single-layer transmission. When the codebook subset is non-coherent (nonCoherent), the UE is configured with any TPMI from 0 to 3 for single-layer transmission.

[0071] exist Figure 1 In the case where TPMIs 0 to 3 are notified, a non-coherent precoder is applied. When TPMIs 4 to 11 are notified, a partially coherent precoder is applied. When TPMIs 12 to 27 are notified, a fully coherent precoder is applied.

[0072] Figure 2 These tables correspond to the precoding matrix W for 2-4 layer (rank 2-4) transmission using 4 antenna ports when transform precoding is invalid in Rel.16 NR.

[0073] according to Figure 2 The TPMI notified to the UE for layer 2 transmission is 0 to 21 (codebook subset is full, partial and non-coherent), 0 to 13 (codebook subset is partial and non-coherent) or 0 to 5 (codebook subset is non-coherent).

[0074] according to Figure 3 The TPMI notified to the UE for layer 3 transmission is 0 to 6 (codebook subset is full, partial and non-coherent), 0 to 2 (codebook subset is partial and non-coherent) or 0 (codebook subset is non-coherent).

[0075] according to Figure 4 , the TPMI notified to the UE for 4-layer transmission is 0 to 4 (codebook subset is full, partial and non-coherent), 0 to 2 (codebook subset is partial and non-coherent) or 0 (codebook subset is non-coherent).

[0076] Figure 5A This table corresponds to the precoding matrix W for single-layer (rank 1) transmission using 2 antenna ports in Rel.16 NR. Figure 5B This table corresponds to the precoding matrix W for 2-layer (rank 2) transmission using 2 antenna ports when transform precoding is disabled in Rel.16 NR.

[0077] according to Figure 5AFor 2-port single-layer transmission, the UE's notified TPMI is 0 to 5 (codebook subsets are full, partial, and non-coherent) or 0 to 1 (codebook subset is non-coherent). When the notified TPMI is 0 to 1, a non-coherent precoder is applied. When the notified TPMI is 2 to 5, a fully coherent precoder is applied.

[0078] according to Figure 5B , the TPMI notified to the UE for 2-port 2-layer transmission is 0 to 2 (codebook subset is full, partial and non-coherent) or 0 (codebook subset is non-coherent).

[0079] In addition, a precoding matrix in which only one element in each column is non-zero can also be called a non-coherent codebook. A precoding matrix in which a specific number of elements in each column (greater than one, but not all elements in the column) are non-zero can also be called a partially coherent codebook. A precoding matrix in which all elements in each column are non-zero can also be called a fully coherent codebook.

[0080] Non-coherent codebooks and partially coherent codebooks may also be referred to as antenna selection precoders, antenna port selection precoders, etc. 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, etc. 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, an x-port port selection precoder, etc. A fully coherent codebook may also be referred to as a non-antenna selection precoder, a full-port precoder, etc. In the present disclosure, codebooks, codebook subsets, and precoders may also be rewritten into one another.

[0081] In addition, in the present disclosure, the partially coherent codebook may also correspond to: a codebook (precoding matrix) corresponding to the TPMI specified by DCI for codebook-based transmission for a UE with a partially coherent codebook subset set (for example, the RRC parameter "codebookSubset" = "partialAndNonCoherent"), except for the codebook corresponding to the TPMI specified for a UE with a non-coherent codebook subset set (for example, the 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).

[0082] In addition, in the present disclosure, a fully coherent codebook may also correspond to: a codebook (precoding matrix) corresponding to a TPMI specified by DCI for codebook-based transmission for a UE set with a fully coherent codebook subset (e.g., RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent"), except for a codebook corresponding to a TPMI specified for a UE set with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") (that is, a codebook with TPMI = 12 to 27 in the case of single-layer transmission with 4 antenna ports).

[0083] In addition, according to Figure 5A As can be seen from Figure 5B, since there is no partially coherent precoder for 2-antenna port transmission, the codebook subset does not need to be set as partial and non-coherent for 2-antenna ports.

[0084] (Precoding information field)

[0085] As described above, the UE may also determine the TPMI and the number of layers (transmission rank) for the PUSCH based on the precoding information field of the DCI (eg, DCI format 0_1 / 0_2) that schedules the PUSCH.

[0086] 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 valid or invalid 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.

[0087] Figure 6This diagram shows an example of the correspondence between the precoding information and number of layers field values, the number of layers, and the TPMI in Rel.16 NR. This correspondence is for four antenna ports when the transform precoder is set to invalid, the maximum rank (maxRank) is set to 2, 3, or 4, and uplink full power transmission is not configured, full power mode 2 (fullpowerMode2), or full power is configured, but the present invention is not limited to this. Furthermore, those skilled in the art will readily understand that the "bit fields mapped to indices" shown in the diagram represent the precoding information and number of layers field values.

[0088] exist Figure 6 The precoding information field is 6 bits when a fully coherent (fullyAndPartialAndNonCoherent) codebook subset is configured for the UE, 5 bits when a partially coherent (partialAndNonCoherent) codebook subset is configured for the UE, and 4 bits when a non-coherent (nonCoherent) codebook subset is configured for the UE.

[0089] In addition, if Figure 6 As shown in FIG, the number of layers and TPMI corresponding to the value of a certain precoding information field may be the same (common) regardless of the codebook subset set for the UE. Figure 6 The number of layers and TPMI indicated by the value of the precoding information field = 0-11 can also be the same for the fully coherent (fullyAndPartialAndNonCoherent), partially coherent (partialAndNonCoherent) and non-coherent (nonCoherent) codebook subsets. Figure 6 In the codebook, the number of layers and TPMI indicated by the value of the precoding information field = 0-31 may also be the same for the fully coherent (fullyAndPartialAndNonCoherent) and partially coherent (partialAndNonCoherent) codebook subsets.

[0090] In addition, the precoding information field may be 0 bits for non-codebook-based PUSCH. In addition, the precoding information field may be 0 bits for codebook-based PUSCH of one antenna port.

[0091] <PUSCH SRS Configuration Based on Codebook>

[0092] Figure 7AIndicates that ul-FullPowerTransmission in Rel.17 is not set, or ul-FullPowerTransmission = fullpowerMode1, or ul-FullPowerTransmission = fullpowerMode2, or ul-FullPowerTransmission = fullpower and N SRS =2 when the SRI indication or the second SRI indication is transmitted based on the codebook. Figure 7B Indicates that ul-FullPowerTransmission=fullpowerMode2 and N in Rel.17 SRS =3 for the SRI indication or the second SRI indication for codebook-based PUSCH transmission. Figure 7C It means ul-FullPowerTransmission = fullpowerMode2 in Rel.17 and N SRS =4, a diagram of the SRI indication or the second SRI indication for PUSCH transmission based on the codebook.

[0093] 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 long if txConfig = nonCodeBook, srs-ResourceSetToAddModList is configured, and there are two SRS resource sets associated with the "nonCodeBook" usage; or if txConfig = codebook, srs-ResourceSetToAddModList is configured, and there are two SRS resource sets associated with the "codebook" usage. Otherwise, the SRS resource set indicator field is 0 bits long.

[0094] For the SRS resource indicator field, when the high-level parameter txConfig=codebook, follow Figures 7A-7C =[log2(NSRS )] bits. N SRS The number of configured SRS resources in the SRS resource set indicated by the SRS resource set indicator field (if present). Otherwise, N SRS The number of SRS resources set in the SRS resource set set by the higher-level parameter srs-ResourceSetToAddModList and associated with the usage of the higher-order parameter with the value 'codeBook'.

[0095] In codebook-based transmission, the PUSCH is scheduled or semi-fixedly configured using DCI formats 0_0, 0_1, and 0_2. Only one or two SRS resource sets can be specified in the SRS-ResourceSetToAddModList parameter with the "codebook" higher-layer parameter usage of the SRS-ResourceSet. Furthermore, only one or two SRS resource sets can be specified in the SRS-ResourceSetToAddModListDCI-0-2 parameter with the "codebook" higher-layer parameter usage of the SRS-ResourceSet.

[0096] In srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, when the purpose of the higher-layer parameter of SRS-ResourceSet is set to "codebook" and two SRS resource sets are set, one or two SRIs and one or two TPMIs are respectively given through two SRS resource indication fields and two precoding information fields.

[0097] The UE follows the SRS resource sets associated with the PUSCH repetitions and applies the indicated SRI(s) and TPMI(s) to one or more PUSCH repetitions. If two SRS resource sets are configured in SRS-ResourceSetToAddModList or srs-ResourceSetToAddModList DCI-0-2 and the usage 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.

[0098] In codebook-based transmission, only one SRS resource may be indicated based on the SRI from the SRS resource set. The maximum number of SRS resources configured for codebook-based transmission is 2, except when the higher-layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2." When aperiodic SRS is configured for the UE, the SRS request field in the DCI triggers the transmission of aperiodic SRS resources.

[0099] Except when the higher-layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", when multiple SRS resources are set as "codebook" through SRS-ResourceSet, the UE expects the higher-layer parameter "nrofSRS-Port" of the SRS-Resource within the SRS-ResourceSet to be set to the same value for all these SRS resources.

[0100] When the higher layer parameter “ul-FullPowerTransmission” is set to “fullpowerMode2”, the following (1) to (3) apply.

[0101] (1) The UE can configure one SRS resource or multiple SRS resources with the same or different numbers of SRS ports within an SRS resource set whose usage is set to "codebook".

[0102] (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 the SRS resource set whose usage is set to "codebook".

[0103] (3) Depending on the UE's capabilities, a maximum of 2 or 4 SRS resources are supported in the SRS resource set whose usage is set to "codebook".

[0104] In the case of a standard codebook-based PUSCH, one SRS resource set can be configured with two SRS resources having the same number of ports. Alternatively, in the case of codebook-based PUSCH repetition (for multiple transmission / reception points (TRPs)), two SRS resource sets having the same number of SRS resources can be configured. In the case of "fullpowerMode2" in the codebook, SRS resources having the same or different numbers of ports can be configured within one SRS resource set.

[0105] (Transmission with more than 4 antenna ports)

[0106] Rel.15 / 16 NR supports up to four layers of uplink (UL) Multiple Input Multiple Output (MIMO) transmission. Future wireless communication systems are studying support for UL transmission with more than four layers to achieve higher spectral efficiency. For example, for Rel.18 NR, research is underway to support transmission with a maximum of 6 rank using six antenna ports, and with a maximum of 6 or 8 rank using eight antenna ports.

[0107] Figure 8 This diagram shows an example antenna layout with eight antenna ports. Ng represents the number of antenna groups. M represents the number of antennas (or antenna elements) in the first dimension, and N represents the number of antennas (or antenna elements) in the second dimension. The first and second dimensions are, for example, horizontal and vertical. P represents the number of polarization planes. When P = 2, this results in a cross-polarized antenna.

[0108] An antenna group may also be referred to as a coherent group. A coherent group may also include more than one coherent port. For example, a partially coherent UE may have multiple coherent groups. Antenna ports within a coherent group may also be coherent. Antenna ports between different coherent groups may also be incoherent.

[0109] Each coherent group may also correspond to a different transmit panel / transmit chain (Tx chain) / SRS resource set / RS resource set / spatial relation info / joint transmission configuration indication state (joint TCI state) / UL TCI state / receive TRP. Here, the SRS resource set may also specifically correspond to an SRS resource set whose purpose is codebook or non-codebook. In addition, each coherent group may also correspond to a different receive TRP. In addition, the coherent group may also be referred to as a coherent antenna group, port group, antenna set, etc.

[0110] As UE capability information, the UE may also report the supported antenna groups / antenna configuration information / coherence number. In addition, the UE may also be configured with coherence groups (e.g., the number of coherence groups and the number of ports included in each coherence group) through higher layer signaling.

[0111] In addition, the antenna layout is not limited to Figure 8 For example, the number of panels equipped with antennas, the orientation of the panels, the coherence of each panel / antenna (complete coherence, partial coherence, incoherence, etc.), the antenna array in a specific direction (horizontal, vertical, etc.), the polarization (polarization) antenna structure (single polarization, cross polarization, the number of polarization planes, etc.) can also be combined with Figure 7A dG-H and dG-V respectively represent the horizontal and vertical intervals between the centers of adjacent antenna groups.

[0112] Furthermore, while Rel.15 / 16 NR supports the transmission of one codeword (CW) per PUSCH, for Rel.18 NR, studies are underway to enable the UE to transmit more than one CW per PUSCH. For example, studies are underway to support 2 CW transmission for ranks 5-8 and 2 CW transmission for ranks 2-8.

[0113] Furthermore, Rel.15 and Rel.16 UEs assume that only one beam / panel is used for UL transmission at any given time. However, in Rel.17 and later, to improve UL throughput and reliability, simultaneous UL transmission (e.g., PUSCH transmission) of multiple beams / panels for more than one TRP is being studied. Furthermore, simultaneous PUSCH transmission of multiple beams / panels can be used for PUSCH transmission with more than four layers, or with fewer than four layers.

[0114] Furthermore, precoding matrices for UL transmission using more than four antenna ports (the number of antenna ports is greater than 4) are under study. For example, a codebook for 8-port transmission (also referred to as an 8-transmission (TX) UL codebook) is under study.

[0115]

[0116] In the specifications so far, Figure 6 As shown in the figure, a number of layers (up to 4 layers) and a TPMI index can be specified to the UE through a precoding information field. In order to transmit with more than 4 antenna ports, the use of Figure 6 Different tables specify a number of layers (up to 8 layers) and a TPMI index to the UE through a precoding information field. Figure 1 If a table of the precoding matrix W shown in the figure is defined as a table with a rank greater than 4, 8-port transmission can be realized based on the notified number of layers and TPMI index.

[0117] Figures 9A to 9C This is a diagram showing an example of implementation of 8-port transmission.

[0118] Figure 9A This diagram shows an example of the correspondence between the precoding information and layer number field values, the layer number, and the TPMI. This example corresponds to eight antenna ports when the transform precoder is set to disabled, the maximum rank (maxRank) is set to 5 or greater, and uplink full power transmission is not configured, full power mode 2 (fullpowerMode2), or full power is configured, but is not limited to this. Figure 9A and Figure 6 The same, but different in that 5 or more layers can be specified as shown in the figure (in the figure, when a fully coherent (fullyAndPartialAndNonCoherent) codebook subset is configured for the UE, the field value = 8, thereby specifying 5 layers and TPMI = 6).

[0119] as well as Figure 9C Each of the tables shows an example of a precoding matrix W for 1-layer and 8-layer (rank 1 and 8) transmission using 8 antenna ports when transform precoding is invalid.

[0120] In this example, X i (i is the number of layers) represents the number of non-interfering encoders used for layer i, Y i represents the number of partial phase precoders used for layer i, Zi denotes the number of fully coherent precoders used for layer i.

[0121] Include X in the codebook for layer i i +Y i +Z i precoder, based on the codebook, non-coherent UE can be based on the TPMI index (0 to X i -1), reference X i precoder, partially coherent UE can be based on the TPMI index (0 to X i +Y i -1), reference X i +Y i precoder, a fully coherent UE can use the TPMI index (0 to X i +Y i +Z i -1), reference X i +Y i +Z i A precoder.

[0122] <Multiple Precoding Information Fields>

[0123] On the other hand, research is underway to include multiple precoding information fields (also known as extended TPMI fields) in the DCI, specifying multiple combinations of a number of layers (up to four layers) and a TPMI index to the UE. Each precoding information field can also be associated with a coherent group.

[0124] In this case, the UE can also reuse the existing 2-port or 4-port UL precoder of Rel.15 / 16 to form a new 8-port UL precoder. The following figures show examples. In addition, these figures also record the use of the existing precoder W 4TX 、W 2TX 、W0. Here, W 4TX This means the existing 4-port UL precoder, W 2TX It refers to the existing 2-port UL precoder, and W0 means a matrix whose elements (components) are all zero.

[0125] Alternatively, for a UE with two coherent groups, one or more existing precoders W may be used. 4TX / W 2TX For example, a UE with two coherent groups of 4 ports each can also perform 8-port transmission based on the two notified TPMI indices and consider one TPMI indication every 4 TXs.

[0126] Figure 10AThis figure shows an example of a new 3-layer precoder based on the reuse of the existing 4-port partial phase precoder. Figure 10A For example, reuse Figure 3 The 3-layer existing precoder is shown.

[0127] Figure 10B 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. Figure 10B For example, reuse Figure 2 、 Figure 4 The existing 2-layer and 4-layer precoders are shown.

[0128] In the case of a UE with 4 coherent groups, 1, 2, 3, or 4 existing precoders W can be reused. 2TX For example, a UE with four coherent groups of two ports per group may also perform eight-port transmission based on the four notified TPMI indices and consider one TPMI indication per 2TX.

[0129] Figure 11A 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. Figure 11A For example, reuse Figure 5B The 2-layer existing precoder is shown.

[0130] Figure 11B is a diagram showing an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups. Figure 11B For example, reuse Figure 5B The 2-layer existing precoder is shown.

[0131] <Using one precoding information field to specify the number of layers>

[0132] Furthermore, studies are underway to specify the number of layers (also referred to as a combination of the number of layers) for each coherence group while maintaining the existing state of including one precoding information field in DCI.

[0133] The precoding information field may also indicate the number of layers in each coherent group (also referred to as a combination of layers) and a TPMI index. The precoding information field may also be applied only to partially coherent UEs.

[0134] For example, a UE with two coherence groups may also be indicated with two layer numbers (each not exceeding four) and one TPMI index. In addition, a UE with four coherence groups may also be indicated with four layer numbers (each not exceeding two) and one TPMI index.

[0135] In addition, in the present disclosure, the order in which the coherent groups are applied can be pre-defined or notified to the UE via higher layer / physical layer signaling. For example, the layer combination 4+3 can also represent 4 layers for the first coherent group and 3 layers for the second coherent group.

[0136] Furthermore, studies are underway to use a single precoding information field included in the DCI to specify the (total) number of layers, and further, to use a new field included in the DCI to specify a combination of layer numbers.

[0137] In this case, the field value of the precoding information contained in the DCI is always the same as Figure 6 The DCI is associated with the number of layers (total number of layers) as shown. Furthermore, the DCI includes a new field related to the corresponding combination of the number of layers when a certain number of layers is specified (hereinafter also referred to as the field indicating the combination of the number of layers of different coherent groups, the rank combination indication field, etc.). The UE may also determine the combination of the number of layers based on the rank combination indication field and the specified number of layers.

[0138] The rank combination designation field may also be applied only to partially coherent UEs, or may be included only in the DCI for partially coherent UEs.

[0139] A correspondence between the rank combination designation field values ​​and the number of layers for each layer may be specified (e.g., in a table). Furthermore, this correspondence may be specified for each coherence group. This correspondence may be specified for all layers (e.g., 1-8 layers) or for a subset of layers (e.g., greater than 4 layers). In other words, this correspondence may differ for each layer.

[0140] (analyze)

[0141] As mentioned above, research is underway to reuse the existing precoder W 4TX / W 2TX , forming a new 8-port precoder. 4TX / W 2TX Without any particular restriction, the number of available 8-port precoders becomes enormous. In this case, the overhead required to notify the UE of the TPMI index that specifies the precoder to be actually used increases, which may inhibit the increase in communication throughput.

[0142] Therefore, the inventors of the present invention have conceived a method for suppressing the number of available 8-port precoders and appropriately performing UL transmission using more than 4 antenna ports.

[0143] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the respective embodiments may be applied individually or in combination.

[0144] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C."

[0145] In the present disclosure, the words “notify,” “activate,” “deactivate,” “instruct (or specify),” “select,” “configure,” “update,” and “determine” may be used interchangeably. In the present disclosure, the words “support,” “control,” “controllable,” “operate,” and “operable” may also be used interchangeably.

[0146] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IEs), and settings may also be overwritten. In this disclosure, Medium Access Control (MAC) Control Elements (CEs), update commands, and activation / deactivation commands may also be overwritten.

[0147] In the present disclosure, high-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (for example, positioning protocol (for example, NR Positioning Protocol A / LTE Positioning Protocol (NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP))) messages, etc.), any one of them, or a combination thereof.

[0148] In the present disclosure, MAC signaling may include, for example, a MAC Control Element (MACCE) and a MAC Protocol Data Unit (PDU). Broadcast information may include, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and other system information (Other System Information (OSI)).

[0149] In the present disclosure, the physical layer signaling may also be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0150] In this disclosure, TPMI and TPMI index can be interchanged. In this disclosure, TX (transmit), port, antenna port, etc. can also be interchanged. Port / antenna port can also refer to the port / antenna port used for UL (e.g., SRS / PUSCH) transmission. In this disclosure, SRS resource set and resource set can be interchanged. Coherence group and SRS resource set can also be interchanged.

[0151] This disclosure primarily describes 8TX, but the same application applies to 5TX, 6TX, 7TX, 8 or more TX, 4 or less TX, and so on. The "8" in the following embodiments can also be rewritten as "n (n is an arbitrary integer)." In this case, the number of layers / ports described assumes a maximum value of "8." Those skilled in the art will be able to rewrite the description appropriately, assuming a maximum value of "n."

[0152] In the present disclosure, the use of one codeword and a number of layers of 4 or less can be overwritten with each other. The use of two codewords and a number of layers of 4 or more can also be overwritten with each other.

[0153] In addition, the following embodiments are based on the premise of codebook-based PUSCH transmission, but are not limited thereto.

[0154] In this disclosure, an x-port precoder (x is an integer) may also refer to an x-port PC / FC / NC precoder. An x-port precoder may also refer to an x-port i-layer PC / FC / NC precoder (or a rank ix-port PC / FC / NC precoder).

[0155] In the present disclosure, the existing x-port precoder may be, for example, the x-port precoder specified in 3GPP Rel.15 NR (for example, a precoder included in a 4-port transmission codebook for UL).

[0156] (Wireless Communication Method)

[0157] <First embodiment>

[0158] The first embodiment relates to N-oriented g =2 for the precoder of 8TX UE.

[0159] In the first embodiment, the 8-port PC precoder can be configured using one existing 4-port precoder or two existing 4-port precoders. The 8-port PC precoder configured using one existing 4-port precoder is also referred to as a Type 1 precoder. The 8-port PC precoder configured using two existing 4-port precoders is also referred to as a Type 2 precoder.

[0160] The type 1 precoder P can also be expressed by the following equation 1.

[0161] [Mathematical formula 1]

[0162]

[0163] Here, A is the existing 4-port precoder, O 4×rank（A） It is a zero matrix with 4 rows and rank(A) columns. Rank(A) means the rank of matrix A (the same applies to the following rank(*)).

[0164] The type 2 precoder P can also be expressed by the following equation 2.

[0165] [Mathematical formula 2]

[0166]

[0167] Here, A1 and A2 are respectively existing 4-port precoders (they may be the same precoder or different precoders).

[0168] The Type 1 precoder can also be used when rank 1 ≤ ≤ 4. That is, rank (A) can also be 1, 2, 3, or 4. For the Type 1 precoder, the occupied antenna group can be {10} or {01} if {first antenna group, second antenna group} is used. Here, the value '1' can also indicate occupied, and the value '0' can also indicate unoccupied. Furthermore, these values ​​can also represent the opposite meaning.

[0169] The Type 2 precoder can also be used when rank < 1. That is, rank(P) = rank(A1) + rank(A2) = 2, 3, 4, 5, 6, 7, or 8. For the Type 2 precoder, the occupied antenna group can also be {11}.

[0170] For type 2 precoders, the combination of (rank of A1, rank of A2) can also be the following:

[0171] ・In the case of rank (P) = 2, (1, 1),

[0172] ・When rank (P) = 3, (1, 2), (2, 1),

[0173] ・When rank (P) = 4, (1, 3), (2, 2), (3, 1),

[0174] ・When rank (P) = 5, (1, 4), (2, 3), (3, 2), (4, 1),

[0175] ・In the case of rank (P) = 6, (2, 4), (3, 3), (4, 2),

[0176] ・In the case of rank (P) = 7, (3, 4), (4, 3),

[0177] ・When rank (P) = 8, (4, 4).

[0178] Figure 12 Yes Figures 1 to 4 A diagram showing the number of existing 4-port precoders. Figure 12 For example, it is shown that for an existing 4-port FC precoder, 16 are specified for rank 1, 8 are specified for rank 2, 4 are specified for rank 3, and 2 are specified for rank 4.

[0179] When all 4-port precoders are used to generate 8-port PC precoders (as selection candidates), the number of 8-port PC precoders becomes large, and there is a concern that the overhead required to notify the TPMI index corresponding to the used precoders will increase.

[0180] In addition, in the present disclosure, in order to generate an 8-port PC precoder, a part of the precoders is selected from the existing precoders. In the present disclosure, the "selection" can mean that it is specified in advance in the standard, it can also mean that it is set through high-layer signaling, and it can also mean that it is reported (or determined) through UE capability information. The "selection" can be performed for each rank / coherence type / TX number, or it can be performed across multiple ranks / coherence types / TX numbers. In addition, the set of precoders that can be specified through physical layer signaling (for example, DCI) can also be determined through high-layer signaling. The same applies to other embodiments.

[0181] In the following embodiments 1.1-1.4, the configuration of N g = 2. The following describes the restrictions on the precoder A, A1, A2, etc. for 8TX UEs. You can apply any one of these restrictions or a combination of them.

[0182] [Implementation 1.1]

[0183] The limitation of embodiment 1.1 relates to the allowed existing precoders. The limitation of embodiment 1.1 may also be that the selection candidates of A / A1 / A2 correspond to at least one of the following limitations:

[0184] (1.1.1) FC precoder only, or PC precoder only,

[0185] (1.1.2) Precoder based only on a certain rule,

[0186] (1.1.3) A combination of (1.1.1) and (1.1.2) above.

[0187] For the above (1.1.1), for example, under the restriction of using only FC precoder, the number of selection candidates for A / A1 / A2 is 16 for rank 1, 8 for rank 2, 4 for rank 3, and 2 for rank 4. Compared with the case where all precoders are selection candidates, the number of selection candidates can be reduced.

[0188] Regarding (1.1.2) above, the precoders based on a certain rule may include, for example, the first specific number of precoders (which may also be referred to as x), the last x precoders, x interval precoders (for example, the x*i+zth precoder (i is an integer, i=0, 1, ..., and Z is an integer from 1 to x)), the odd-numbered precoder, the even-numbered precoder, or a combination thereof. Furthermore, the rule may differ for each rank. For example, the precoders based on a certain rule may include the first x precoders, with the value of x varying for each rank.

[0189] In addition, the first x may also mean the x starting from the smallest TPMI index in the correspondence relationship (table) of the existing precoding matrix W.

[0190] Alternatively, assuming there are n precoder candidates before narrowing based on a certain rule, x corresponds to n / m (where m is an integer, e.g., m=2) with a ceiling function, floor function, or rounding to the nearest decimal point applied. The UE can be notified of information related to x, m, etc., or determine the value based on its own UE capabilities.

[0191] As an example of the above (1.1.3), for example, under the restriction of using only the FC precoder of the above (1.1.1), the UE may also use FC precoders such as the first 8 (=16 / 2) of the 16 FC precoders for rank 1 and the first 4 (=8 / 2) of the 8 FC precoders for rank 2 determined based on the rules of the above (1.1.2) as selection candidates for A / A1 / A2.

[0192] [Implementation Method 1.2]

[0193] The restriction of embodiment 1.2 relates to combinations of allowed ranks for multiple antenna groups. The restriction of embodiment 1.2 may also be that, when a type 2 precoder is used, for A1 / A2 selection candidates, the combination of (A1 rank, A2 rank) complies with at least one of the following rules:

[0194] (1.2.1) The rank of A1 and the rank of A2 are (approximately) the same,

[0195] (1.2.2) The rank of A1 or the rank of A2 is as large as possible (or the difference between their ranks is as large as possible),

[0196] (1.2.3) When (rank of A1, rank of A2)=(r, s) (r and s are integers) is a selection candidate, (rank of A1, rank of A2)=(s, r) is excluded from the selection candidates.

[0197] The rule in (1.2.1) above can also correspond to dividing the rank of P as equally as possible between A1 and A2 (in other words, two antenna groups). For (1.2.1) above, the combination of (rank of A1, rank of A2) can also be, for example, the following:

[0198] ・In the case of rank (P) = 4, only (2, 2) (excluding (1, 3), (3, 1)),

[0199] ・In the case of rank (P) = 6, only (3, 3) (excluding (2, 4), (4, 2)),

[0200] ・ When rank(P) = 5, only (2, 3), (3, 2) (excluding (1, 4), (4, 1)).

[0201] From this example, "(substantially) the same" in (1.2.1) can mean that the rank of A1 and the rank of A2 are exactly the same, or it can mean that the absolute value of their difference is below a threshold (e.g., threshold = 1). In addition, information related to the threshold can also be notified to the UE.

[0202] The rule of the above (1.2.2) can also correspond to the rank that fully occupies A1 or A2 (in other words, one antenna group). For the above (1.2.2), the combinations of (the rank of A1, the rank of A2) can also be, for example:

[0203] ・ When rank(P) = 4, only (1, 3), (3, 1) (excluding (2, 2)),

[0204] ・ When rank(P) = 6, only (2, 4), (4, 2) (excluding (3, 3)),

[0205] ・ When rank(P) = 5, only (1, 4), (4, 1) (excluding (2, 3), (3, 2)).

[0206] For the above (1.2.3), for example, when (the rank of A1, the rank of A2) = (4, 2) is a selection candidate, (the rank of A1, the rank of A2) = (2, 4) can also be excluded from the selection candidates.

[0207] [Embodiment 1.3]

[0208] The restrictions of Embodiment 1.3 relate to the combinations of allowed antenna groups. The restrictions of Embodiment 1.3 can also be restrictions such that the following types of precoders can be utilized (supported) when 1 < rank(P) ≤ 4:

[0209] (1.3.1) Only one type (i.e., only type 1 precoder, or only type 2 precoder),

[0210] (1.3.2) Two types.

[0211] For the above (1.3.2), different restrictions can also be applied for each type based on Embodiment 1.1 / 1.2 / 1.4.

[0212] [Embodiment 1.4]

[0213] The restrictions of embodiment 1.4 relate to the allowed combinations of A1 and A2. The restrictions of embodiment 1.4 may also be that, when using a type 2 precoder, A1 and A2 must be the same precoder under a specific condition. This specific condition may be, for example, that the rank of A1 and the rank of A2 are the same.

[0214] For example, the UE may assume that, when rank (P) = 4 and A1's rank = A2's rank = 2, A1 and A2 are the same rank 2-port precoder. The UE may also assume that, when rank (P) = 6 and A1's rank = A2's rank = 3, A1 and A2 are the same rank 3-port precoder. The UE may also assume that, when rank (P) = 8 and A1's rank = A2's rank = 4, A1 and A2 are the same rank 4-port precoder.

[0215] Furthermore, embodiments 1.1-1.4 may be arbitrarily combined. For example, for each rank of P, for combinations that follow the rules of embodiment 1.2 (rank of A1, rank of A2), a portion of the precoders for A1 / A2 described in embodiment 1.1 may be determined as selection candidates. Alternatively, different restrictions may be applied for each type / rank.

[0216] According to the first embodiment described above, the number of precoders for 8TX UE having two antenna groups can be appropriately suppressed.

[0217] <Second embodiment>

[0218] The second embodiment relates to N-oriented g =4 for the precoder of 8TX UE.

[0219] In the second embodiment, the 8-port PC precoder may be configured using one to four existing 2-port precoders. An 8-port PC precoder configured using i (i=1 to 4) existing 4-port precoders may also be referred to as a type-i precoder.

[0220] The type 1 precoder P can also be expressed by the following equation 3.

[0221] [Mathematical formula 3]

[0222]

[0223] Here, A is the existing 2-port precoder, O k×rank（A） is a zero matrix with k (e.g. k=2, 4, 6) rows and rank (A) columns. In addition, the type i precoder of the second embodiment has 8 rows and rank (A) columns (or 8 rows of Σ i rank(Ai ) columns) matrix, so the lower right matrix "8 × rank (A) (or 8 rows Σ i rank(A i ) column)" is omitted. In addition, as in Formula 3, P listed with commas can also mean that P is represented by at least one of the described formulas (the same applies to subsequent mathematical formulas).

[0224] The type 2 precoder P can also be expressed by the following equation 4.

[0225] [Formula 4]

[0226]

[0227] Here, A1 and A2 are respectively existing 4-port precoders (they may be the same precoder or different precoders).

[0228] The type 3 precoder P can also be expressed by the following equation 5.

[0229] [Formula 5]

[0230]

[0231] Here, A1, A2, and A3 are respectively existing 4-port precoders (they may be the same precoder or different precoders).

[0232] The type 4 precoder P can also be expressed by the following equation 6.

[0233] [Formula 6]

[0234]

[0235] Here, A1, A2, A3, and A4 are respectively existing 4-port precoders (they may be the same precoder or different precoders).

[0236] The Type 1 precoder can also be used when rank 1 ≤ ≤ 2. That is, rank (A) can also be 1 or 2. For the Type 1 precoder, the occupied antenna groups, if {first antenna group, second antenna group, third antenna group, fourth antenna group}, can be {1000}, {0100}, {0010}, or {0001} (corresponding to the P in equation 3, arranged from the left, respectively). Here, the value '1' can also mean occupied, and the value '0' can also mean unoccupied. Furthermore, these values ​​can also represent the opposite meaning.

[0237] The type 2 precoder can also be used when 2 ≤ rank ≤ 4. That is, rank (P) = rank (A1) + rank (A2) = 2, 3, or 4. For the type 2 precoder, the occupied antenna group can also be {1100}, {1010}, {1001}, {0110}, {0101}, or {0011} (corresponding to the P in the order from the left in equation 4, respectively).

[0238] For type 2 precoders, the combination of (rank of A1, rank of A2) can also be the following:

[0239] ・In the case of rank (P) = 2, (1, 1),

[0240] ・In the case of rank (P) = 3, (2, 1), (1, 2),

[0241] ・When rank (P) = 4, (2, 2).

[0242] The type 3 precoder can also be used when rank 3 ≤ ≤ 6. That is, rank (P) = rank (A1) + rank (A2) = 3, 4, 5, or 6. For the type 3 precoder, the occupied antenna groups can also be {1110}, {1101}, {1011}, or {0111} (corresponding to the P in the order from the left in Equation 5, respectively).

[0243] For type 3 precoders, the combination of (rank of A1, rank of A2, rank of A3) can also be the following:

[0244] ・In the case of rank (P) = 3, (1, 1, 1),

[0245] ・When rank (P) = 4, (2, 1, 1), (1, 2, 1), (1, 1, 2),

[0246] ・When rank (P) = 5, (2, 2, 1), (2, 1, 2), (1, 2, 2),

[0247] ・When rank (P) = 6, (2, 2, 2).

[0248] The type 4 precoder can also be used when rank 4 ≤ ≤ 8. That is, rank (P) = rank (A1) + rank (A2) = 4, 5, 6, 7, or 8. For the type 3 precoder, the occupied antenna group can also be {1111} (corresponding to P in equation 6).

[0249] For type 4 precoder, the combination of (rank of A1, rank of A2, rank of A3, rank of A4) can also be the following:

[0250] ・In the case of rank (P) = 4, (1, 1, 1, 1),

[0251] ・When rank (P) = 5, (2, 1, 1, 1), (1, 2, 1, 1), (1, 1, 2, 1), (1, 1, 1, 2),

[0252] ・In the case of rank (P) = 6, (2, 2, 1, 1), (2, 1, 2, 1), (2, 1, 1, 2), (1, 2, 2, 1), (1, 1, 2, 2), (1, 2, 1, 2),

[0253] ・When rank (P) = 7, (2, 2, 2, 1), (2, 2, 1, 2), (2, 1, 2, 2), (1, 2, 2, 2),

[0254] ・When rank (P) = 8, (2, 2, 2, 2).

[0255] Figure 13 Yes Figures 5A to 5B A diagram showing the number of existing 2-port precoders. Figure 13 For example, it is shown that for an existing 2-port FC precoder, 4 are specified for rank 1 and 2 are specified for rank 2.

[0256] When all 2-port precoders are used to generate 8-port PC precoders (as selection candidates), the number of 8-port PC precoders becomes large, and there is a concern that the overhead required to notify the TPMI index corresponding to the used precoders will increase.

[0257] In the following embodiments 2.1-2.5, the configuration of N g The following describes the restrictions on the precoder A, A1, A2, A3, and A4 for an 8TX UE with a value of 4. These restrictions may be applied individually or in combination.

[0258] [Implementation Method 2.1]

[0259] The limitation of embodiment 2.1 relates to the allowed existing precoders. The limitation of embodiment 2.1 may also be that the selection candidates of A / A1 / A2 / A3 / A4 correspond to at least one of the following limitations:

[0260] (2.1.1) Only FC precoder, or only PC precoder,

[0261] (2.1.2) Precoder based only on a certain rule,

[0262] (2.1.3) A combination of (2.1.1) and (2.1.2) above.

[0263] Regarding the above (2.1.1), for example, under the restriction of using only FC precoders, the number of selection candidates for A / A1 / A2 is 4 for rank 1 and 2 for rank 2. Compared with the case where all precoders are selection candidates, the number of selection candidates can be reduced.

[0264] Regarding (2.1.2) above, the precoders based on a certain rule may include, for example, the first specific number of precoders (which may also be referred to as x), the last x precoders, x interval precoders (for example, the x*i+zth precoder (i is an integer, i=0, 1, ..., and Z is an integer greater than or equal to x)), the odd-numbered precoder, the even-numbered precoder, or a combination thereof. Furthermore, the rule may differ for each rank. For example, the precoders based on a certain rule may include the first x precoders, with the value of x varying for each rank.

[0265] In addition, the first x may also mean the x starting from the smallest TPMI index in the correspondence relationship (table) of the existing precoding matrix W.

[0266] Alternatively, assuming there are n precoder candidates before narrowing based on a certain rule, x corresponds to n / m (where m is an integer, e.g., m=2) with a ceiling function, floor function, or rounding to the nearest decimal point applied. The UE can be notified of information related to x, m, etc., or determine the value based on its own UE capabilities.

[0267] As an example of the above (2.1.3), for example, under the restriction of using only the FC precoder of the above (2.1.1), the UE may also use the first two (=4 / 2) of the four FC precoders for rank 1 and the first one (=2 / 2) of the two FC precoders for rank 2 determined based on the rules of the above (2.1.2) as selection candidates for A / A1 / A2 / A3 / A4.

[0268] [Implementation Method 2.2]

[0269] The restriction in Embodiment 2.2 relates to combinations of allowed ranks for multiple antenna groups. Embodiment 2.2 may also include a restriction that, when using Type 2 / 3 / 4 precoders, only combinations of A1 / A2 / A3 / A4 that satisfy one or more of the ranks of A1 / A2 / A3 / A4 are selected as selection candidates for each rank of P, and that all other combinations are excluded from selection candidates.

[0270] [Implementation Method 2.3]

[0271] The restriction of embodiment 2.3 relates to the combinations of allowed antenna groups. The restriction of embodiment 2.3 may also be that, when multiple types of precoders are available as candidate ranks (for example, 2≤rank(P)≤6) as described above, the following types of precoders can be used (supported):

[0272] (2.3.1) only 1 type,

[0273] (2.3.2) Only 2 types,

[0274] (2.3.3) All types.

[0275] For the above (2.3.1), for example, the following can also be supported:

[0276] ・For rank(P)=2, only type 1 or 2,

[0277] ・For rank(P)=3, only type 2 or 3,

[0278] ・For rank(P)=4, only type 2 or 3 or 4,

[0279] ・For rank(P)=5 / 6, only type 3 or 4.

[0280] Regarding the above (2.3.2) and (2.3.3), different restrictions may be applied to each type based on implementations 2.1 / 2.2 / 2.4 / 2.5.

[0281] For example, for a type 2 precoder, when rank (P) = 3, a restriction may be used such that only one of (rank of A1, rank of A2) = (2, 1) and (rank of A1, rank of A2) = (1, 2) is a selection candidate.

[0282] For example, for a type 3 precoder, the selection candidates (rank A1, rank A2, rank A3) may also be the following:

[0283] ・When rank (P) = 4, any one of the combinations (2, 1, 1), (1, 2, 1), and (1, 1, 2) (i.e., the other two combinations are excluded from the selection candidates),

[0284] When rank (P) = 5, any one of the combinations (2, 2, 1), (2, 1, 2), and (1, 2, 2) (i.e., the other two combinations are excluded from the selection candidates).

[0285] For example, for a type 4 precoder, the selection candidates (rank A1, rank A2, rank A3, rank A4) may also be the following:

[0286] ・When rank (P) = 5, any one of the combinations of (2, 1, 1, 1), (1, 2, 1, 1), (1, 1, 2, 1), and (1, 1, 1, 2) (i.e., the other three combinations are excluded from the selection candidates),

[0287] ・When rank (P) = 6, any one of the combinations of (2, 2, 1, 1), (2, 1, 2, 1), (2, 1, 1, 2), (1, 2, 2, 1), (1, 1, 2, 2), and (1, 2, 1, 2) (i.e., the other 5 combinations are excluded from the selection candidates),

[0288] When rank (P) = 7, any one of the following combinations: (2, 2, 2, 1), (2, 2, 1, 2), (2, 1, 2, 2), and (1, 2, 2, 2) (i.e., the other three combinations are excluded from the selection candidates).

[0289] [Implementation Method 2.4]

[0290] The limitations of embodiment 2.4 concern the allowed combinations of A1-A4.

[0291] The restriction in Embodiment 2.4 may be that, when using a type 2 precoder, A1 and A2 may be the same precoder under a specific condition. For example, the specific condition may be that the rank of A1 and the rank of A2 are the same.

[0292] The restriction in Embodiment 2.4 may be that, when using a Type 3 precoder, A1, A2, and A3 are the same precoder under a specific condition. For example, the specific condition may be that the rank of A1, the rank of A2, and the rank of A3 are the same.

[0293] The restriction in Embodiment 2.4 may be that, when using a type 3 precoder, two of A1, A2, and A3 may be the same precoder under a specific condition. For example, the specific condition may be that the ranks of the two matrices are the same.

[0294] The restriction of embodiment 2.4 may be that, when using type 4 precoder, A1, A2, A3, and A4 are the same precoder under a specific condition. For example, the rank of A1, the rank of A2, the rank of A3, and the rank of A4 may be the same.

[0295] The restriction in Embodiment 2.4 may also be that, when using a Type 4 precoder, two (or three) of A1, A2, A3, and A4 may be the same precoder under a specific condition. This specific condition may be, for example, that the ranks of the two (or three) matrices are the same.

[0296] [Implementation Method 2.5]

[0297] The restriction of embodiment 2.5 relates to the allowed combinations of occupied antenna groups. As shown in equation 3-5, the position of the existing precoder in the precoder P varies depending on the occupied antenna group.

[0298] The restriction of implementation mode 2.5 may also be that when using a type 1 precoder, the occupied {first antenna group, second antenna group, third antenna group, fourth antenna group} is a combination of part of {1000}, {0100}, {0010}, and {0001} (for example, a combination of 1 or 2).

[0299] The restriction of implementation mode 2.5 may also be that when using a type 2 precoder, the occupied {first antenna group, second antenna group, third antenna group, fourth antenna group} are combinations of {1100}, {1010}, {1001}, {0110}, {0101}, and part of {0011} (for example, combinations in which the occupied antenna groups are adjacent (such as {1100}), combinations in which the occupied antenna groups are not adjacent (such as {1010})).

[0300] The restriction of implementation mode 2.5 may also be that when using a type 3 precoder, the occupied {first antenna group, second antenna group, third antenna group, fourth antenna group} is a combination of {1110}, {1101}, {1011}, or part of {0111} (for example, a combination in which all occupied antenna groups are adjacent (such as {1110})).

[0301] In addition, embodiments 2.1-2.5 may be combined arbitrarily, and different restrictions may be applied to each type / rank.

[0302] According to the second embodiment described above, the number of precoders for 8TX UE having 4 antenna groups can be appropriately suppressed.

[0303] <Third embodiment>

[0304] The third embodiment relates to an N-oriented g =2 for the precoder of 8TX UE.

[0305] The third embodiment is similar to the first embodiment, but the structure of the precoder (codebook) is different. In the third embodiment, the 8-port PC precoder can also be constructed using 1, 2, or 4 existing 4-port precoders. The 8-port PC precoder constructed using 1 existing 4-port precoder can also be called a type A precoder. The 8-port PC precoder with 1≤rank≤4 constructed using 2 existing 4-port precoders can also be called a type B precoder. The 8-port PC precoder with 4<rank constructed using 2 existing 4-port precoders can also be called a type C precoder. The 8-port PC precoder with 4<rank constructed using 4 existing 4-port precoders can also be called a type D precoder.

[0306] The type A precoder P can also be expressed by the following equation 7.

[0307] [Formula 7]

[0308]

[0309] Here, A represents a conventional four-port precoder. Furthermore, φ can also represent phase matching (or a value used for phase matching), such as the elements of Quadrature Phase Shift Keying (QPSK) (1, -1, j (j is an imaginary number), -j), or other values ​​(this also applies to the following description).

[0310] The type B precoder P can also be expressed by the following equation 8.

[0311] [Formula 8]

[0312]

[0313] Here, A and B are conventional 4-port precoders (they may be the same precoder or different precoders). Also, the rank of A = the rank of B.

[0314] The type C precoder P can also be expressed by the following equation 9.

[0315] [Formula 9]

[0316]

[0317] Here, A1 and A2 are existing 4-port precoders (they may be the same precoder or different precoders). In addition, rank (P) = rank (A1) + rank (A2) = 5, 6, 7, or 8.

[0318] The type D precoder P can also be expressed by the following equation 10.

[0319] [Formula 10]

[0320]

[0321] Here, A1, A2, B1, and B2 are each an existing 4-port precoder (they can be the same or different). Alternatively, rank(P) = rank(A1) + rank(A2) = 5, 6, 7, or 8. Furthermore, the rank of A1 = the rank of B1, and the rank of A2 = the rank of B2.

[0322] For type C / D precoders, the combination of (rank of A1, rank of A2) can also be the following:

[0323] ・When rank (P) = 5, (1, 4), (2, 3), (3, 2), (4, 1),

[0324] ・In the case of rank (P) = 6, (2, 4), (3, 3), (4, 2),

[0325] ・In the case of rank (P) = 7, (3, 4), (4, 3),

[0326] ・When rank (P) = 8, (4, 4).

[0327] In the following embodiments 3.1-3.6, the configuration of N g The following describes the restrictions on the precoder A, B, A1, A2, B1, and B2 for an 8TX UE with a value of 2. These restrictions may be applied individually or in combination.

[0328] [Implementation Methods 3.1-3.4]

[0329] Implementations 3.1 to 3.4 may also correspond to implementations 1.1 to 1.4 with the following rewritten contents:

[0330] ・Type 1 → Type A / B,

[0331] ・Type 2 → Type C / D,

[0332] ・(Precoder)A→(Precoder)A / B,

[0333] ・(Precoder) A1 → (Precoder) A1 / B1,

[0334] ・(Precoder) A2 → (Precoder) A2 / B2.

[0335] In addition, the limitation of Embodiment 3.3 can also be a limitation such that when 1 ≤ rank(P) ≤ 4 or 4 < rank(P), the following types of precoders can be utilized (supported):

[0336] (3.3.1) Only one type (i.e., only type A precoder or type B precoder, only type C precoder or type D precoder),

[0337] (3.3.2) Two types.

[0338] [Embodiment 3.5]

[0339] The limitation of Embodiment 3.5 relates to φ. The available values of φ can also be restricted for each type / rank. For example, as φ, only one value (e.g., 1) or a part of the values can be used among 1, -1, j, and -j.

[0340] [Embodiment 3.6]

[0341] The limitation of Embodiment 3.6 relates to A1 and A2 (or B1 and B2).

[0342] The limitation of Embodiment 3.6 can also be a limitation such that A1 and A2 (or B1 and B2) are precoders using the same antenna ports. For example, when A1 occupies antenna ports 0 and 2, the UE can also determine that A2 also occupies antenna ports 0 and 2.

[0343] The limitation of Embodiment 3.6 can also be a limitation such that A1 and A2 (or B1 and B2) are precoders using different antenna ports. For example, when A1 occupies antenna ports 0 and 2, the UE can also determine that A2 occupies antenna ports 1 and 3.

[0344] In addition, Embodiments 3.1 - 3.6 can also be combined arbitrarily. Different limitations can also be applied for each type / rank.

[0345] According to the third embodiment described above, the number of precoders for an 8TX UE with two antenna groups can be appropriately suppressed.

[0346] <Fourth Embodiment>

[0347] The fourth embodiment relates to a precoder for an 8TX UE with N g = 四的8TX UE的预编码器。

[0348] In the second embodiment, an 8 - port PC precoder is constituted using 2 - port precoders, but in the fourth embodiment, an 8 - port PC precoder is constituted using 4 - port precoders. It should be noted that in the translation of "= 四", it seems there is an error in the original text. If it is supposed to be "= 4", the translation should be "= 4". I translated it as "= four" according to the original text. You can adjust it according to the actual situation.

[0349] The 8-port PC precoder of the fourth embodiment can also be expressed by Equation 1 / Equation 2, similar to the type 1 / 2 precoder of the first embodiment. However, in the first embodiment, A / A1 / A2 assumes a PC precoder / FC precoder, but in the fourth embodiment, A / A1 / A2 assumes a PC precoder / NC precoder, which is different.

[0350] Furthermore, in the first embodiment, one A, A1, or A2 corresponds to one occupied antenna group, but in the fourth embodiment, one A, A1, or A2 corresponds to two occupied antenna groups (in other words, one pair of occupied antenna groups).

[0351] That is, in the 8-port PC precoder of the fourth embodiment, one PC precoder / NC precoder is applied to N g = 2 antenna groups out of 4, another PC precoder / NC precoder is applied to N g = Another 2 antenna groups out of 4.

[0352] For the type 1 precoder of the first embodiment, if the occupied antenna group is {first antenna group, second antenna group}, then the occupied antenna group is {10} or {01}. For example, for the type 1 precoder of the fourth embodiment, if the occupied antenna group pair is {first antenna group pair, second antenna group pair}, then the occupied antenna group is {10} or {01}. In other words, if the occupied antenna group is {first antenna group, second antenna group, third antenna group, fourth antenna group}, then the occupied antenna group is {1000}, {1100}, and {0100}, or {0001}, {0011}, and {0010}.

[0353] N-oriented g The restrictions on A, A1, A2, etc. of the precoder for an 8TX UE with A=4 (Embodiments 4.1 to 4.4) may be the same as those in Embodiments 1.1 to 1.4 (however, there are differences as described above).

[0354] Furthermore, embodiments 4.1-4.4 may be combined arbitrarily, and different restrictions may be applied to each type / rank.

[0355] According to the fourth embodiment described above, the number of precoders for 8TX UE having 4 antenna groups can be appropriately suppressed.

[0356] <Supplement>

[0357] In the above embodiment, N g =2 or 4, but in N g For values ​​other than these (e.g., Ng =3), at least one of the restrictions shown in the above-mentioned embodiment may be applied to the existing precoder constituting the 8-port precoder.

[0358] In addition, the existing n-port precoder in the present disclosure can also be rewritten with a non-existing n-port precoder. In addition, the designations such as Type 1 and Type A are not limited to these.

[0359] [Notification of Information to UE]

[0360] In the above-mentioned embodiment, the notification of arbitrary information (from the network (NW)) (e.g., the base station (BS))) to the UE (in other words, the reception of arbitrary information from the BS in the UE) can also be performed using physical layer signaling (e.g., DCI), high-layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or a combination thereof.

[0361] When the above notification is performed through a MAC CE, the MAC CE may be identified by including a new logical channel ID (Logical Channel ID (LCID)) not specified in existing specifications in the MAC subheader.

[0362] In the case where the above-mentioned notification is performed through DCI, the above-mentioned notification may also be performed through a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used in scrambling of a Cyclic Redundancy Check (CRC) bit assigned to the DCI, the format of the DCI, and the like.

[0363] Furthermore, the notification of arbitrary information to the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0364] [Notification of information from UE]

[0365] The notification of arbitrary information from the UE (to the NW) in the above-mentioned embodiment (in other words, the sending / reporting of arbitrary information from the UE to the BS) can also be carried out using physical layer signaling (e.g., UCI), high-layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or a combination thereof.

[0366] When the above notification is performed through MAC CE, the MAC CE can also be identified by including a new LCID that is not specified in the existing specifications in the MAC subheader.

[0367] When the notification is performed using UCI, the notification may be transmitted using PUCCH or PUSCH.

[0368] Furthermore, the notification of arbitrary information from the UE in the above-mentioned embodiments may be performed periodically, semi-continuously, or aperiodically.

[0369] [Regarding the application of each embodiment]

[0370] At least one of the above embodiments may also be applied to a situation where a specific condition is satisfied. The specific condition may be specified in a specification or may be notified to the UE / BS using higher layer signaling / physical layer signaling.

[0371] At least one of the above-mentioned embodiments may also be applied only to UEs that report a specific UE capability (UE capability) or support the specific UE capability.

[0372] The specific UE capability may also indicate at least one of the following:

[0373] Supporting specific processing / operation / control / information for at least one of the above embodiments,

[0374] ・Support 8TX UL transmission,

[0375] ・Supported related groups,

[0376] ・The types of precoders supported (e.g., Type 1 / 2, Type A / B / C / D),

[0377] ・Existing x-port PC / FC / NC precoders can be used (supported) in an 8-port PC precoder configuration.

[0378] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across the entire frequency (commonly regardless of the frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (FS) or feature set per component carrier (FSPC)).

[0379] Furthermore, the specific UE capability may be a capability applied across all duplex modes (common regardless of the duplex mode) or a capability for each duplex mode (eg, time division duplex (TDD) or frequency division duplex (FDD)).

[0380] Furthermore, at least one of the aforementioned embodiments may also be applied to a case where specific information associated with the aforementioned embodiment is configured / activated / triggered by the UE via higher layer signaling / physical layer signaling (or the actions of the aforementioned embodiment are performed). For example, the specific information may include information indicating activation of 8TX UL transmission, information indicating activation of an 8-port PC precoder based on an existing x-port PC / FC / NC precoder, or arbitrary RRC parameters for a specific release (e.g., Rel. 18 / 19).

[0381] The UE may also apply operations such as Rel.15 / 16 when it does not support at least one of the above-mentioned specific UE capabilities or is not configured with the above-mentioned specific information.

[0382] (Note)

[0383] The following inventions are attached to one embodiment of the present disclosure.

[0384] [Note 1]

[0385] Terminal, with:

[0386] A control unit determines an 8-port partially interlocked precoder formed based on at least a portion of the 4-port precoder that is restricted based on rank; and

[0387] The sending unit performs uplink sending based on the 8-port partially interleaved encoder.

[0388] [Note 2]

[0389] In the terminal described in Appendix 1, the part of the precoders includes a specific number of partially interleaved precoders or fully interleaved precoders starting from the smallest transmitted precoding matrix indicator in the correspondence relationship of the existing precoding matrix related to a certain rank.

[0390] [Note 3]

[0391] In the terminal described in Supplement 1 or Supplement 2, the part of the precoders includes two 4-port precoders whose rank combination follows a certain rule.

[0392] [Note 4]

[0393] In the terminal according to any one of Notes 1 to 3, the part of the precoders includes two 4-port precoders of the same rank and the same precoder.

[0394] (Note)

[0395] The following inventions are attached to one embodiment of the present disclosure.

[0396] [Note 1]

[0397] Terminal, with:

[0398] The control unit determines an 8-port partially interlocked precoder configured based on at least a portion of the 2-port precoders that is restricted based on rank; and

[0399] The sending unit performs uplink sending based on the 8-port partially interleaved encoder.

[0400] [Note 2]

[0401] In the terminal described in Appendix 1, the part of the precoders includes a specific number of partially interleaved precoders or fully interleaved precoders starting from the smallest transmitted precoding matrix indicator in the correspondence relationship of the existing precoding matrix related to a certain rank.

[0402] [Note 3]

[0403] In the terminal described in Supplement 1 or Supplement 2, the part of the precoders includes a plurality of 2-port precoders whose rank combination follows a certain rule.

[0404] [Note 4]

[0405] In the terminal according to any one of Notes 1 to 3, the part of the precoders includes at least two 2-port precoders of the same rank and the same precoder.

[0406] (Wireless Communication System)

[0407] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0408] Figure 14 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. Wireless communication system 1 (also referred to simply as system 1) may 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 (5GNR), or the like.

[0409] In addition, the wireless communication system 1 may also support dual connectivity between multiple radio access technologies (Radio Access Technologies (RATs)) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0410] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0411] The wireless communication system 1 may also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both the MN and the SN are NR base stations (gNB)).

[0412] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The arrangement and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0413] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0414] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). The frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may correspond to a frequency band higher than FR2.

[0415] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0416] Multiple base stations 10 may be connected via wired (e.g., optical fiber based on the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which functions as a host station, may be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which functions as a relay station (relay), may be referred to as an IAB node.

[0417] The base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0418] The core network 30 may also include network functions (NFs), such as the User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration, and Maintenance (Management) (OAM). Furthermore, a single network node may provide multiple functions. Furthermore, communication with external networks (e.g., the Internet) may be performed via the DN.

[0419] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0420] In the wireless communication system 1 , a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0421] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1 , other radio access schemes (eg, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0422] In the wireless communication system 1 , downlink channels such as a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20 , a broadcast channel (Physical Broadcast Channel (PBCH)), and a downlink control channel (Physical Downlink Control Channel (PDCCH)) can be used.

[0423] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used as an uplink channel.

[0424] The PDSCH transmits user data, higher-layer control information, and the System Information Block (SIB). The PUSCH also transmits user data and higher-layer control information. The PBCH also transmits the Master Information Block (MIB).

[0425] The PDCCH may also transmit lower layer control information, which may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0426] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules 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.

[0427] PDCCH detection also utilizes a control resource set (CORESET) and a search space. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can 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 configuration.

[0428] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and so on, used in this disclosure, may be interchangeable.

[0429] The PUCCH can also transmit 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 ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH can also transmit the random access preamble used to establish a connection with a cell.

[0430] 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.

[0431] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may also be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), and a phase tracking reference signal (PTRS) may also be transmitted as DL-RS.

[0432] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for the PBCH) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0433] In addition, wireless communication system 1 may also transmit a sounding reference signal (SRS) or a demodulation reference signal (DMRS) as an uplink reference signal (UL-RS). DMRS is also called a user terminal-specific reference signal (UE-specific Reference Signal).

[0434] (Base Station)

[0435] Figure 15 This figure illustrates an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140 may be provided.

[0436] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also conceivable that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0437] 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 this disclosure relates.

[0438] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission, reception, and measurement using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transceiver unit 120. The control unit 110 may also perform call processing (e.g., setup and release) of communication channels, manage the status of the base station 10, and manage radio resources.

[0439] Transmitter / receiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. Baseband unit 121 may also include a transmit processing unit 1211 and a receive processing unit 1212. Transmitter / receiver unit 120 may include a transmitter / receiver, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmit / receive circuits, and the like, as described based on common knowledge in the technical fields involved in this disclosure.

[0440] 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.

[0441] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0442] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0443] 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.

[0444] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 110, to generate a bit string to be transmitted.

[0445] The transmitting and receiving unit 120 (transmitting processing unit 1211) may also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0446] 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 .

[0447] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filtering, and demodulation into baseband signals on the radio frequency band signals received via the transmitting and receiving antenna 130 .

[0448] The transmitting and receiving unit 120 (receiving processing unit 1212) may also apply receiving processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), 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.

[0449] The transmitting / receiving unit 120 (measuring unit 123) may also perform measurements related to received signals. For example, the measuring unit 123 may perform radio resource management (RRM) measurements and channel state information (CSI) measurements based on the received signals. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), and propagation path information (e.g., CSI). The measurement results may also be output to the control unit 110.

[0450] 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), control plane data, etc. for the user terminal 20.

[0451] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0452] Furthermore, the transmitting / receiving unit 120 may also control the transmission of configuration information for an 8-port partial phase precoder configured by determining at least a portion of the 4-port precoder that is restricted based on rank, to the user terminal 20. This configuration information may include, for example, information indicating activation of an 8-port PC precoder based on an existing x-port PC / FC / NC precoder, information indicating a portion of precoders selected from existing precoders for generating an 8-port PC precoder, and the like.

[0453] The transmitting and receiving unit 120 may also receive uplink transmissions transmitted based on the 8-port partially interleaved precoder.

[0454] Furthermore, the transmitting / receiving unit 120 may also control the transmission of configuration information for an 8-port partial phase precoder configured by determining a portion of the 2-port precoder that is restricted based on at least rank, to the user terminal 20. This configuration information may include, for example, information indicating activation of an 8-port PC precoder based on an existing x-port PC / FC / NC precoder, information indicating a portion of precoders selected from existing precoders for generating an 8-port PC precoder, and the like.

[0455] The transmitting and receiving unit 120 may also receive uplink transmissions transmitted based on the 8-port partially interleaved precoder.

[0456] (User Terminal)

[0457] Figure 16 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0458] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0459] 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 this disclosure relates.

[0460] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0461] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0462] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0463] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0464] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0465] 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.

[0466] The transmitting and receiving unit 220 (transmitting processing unit 2211 ) may also perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information obtained from the control unit 210 to generate a bit sequence to be transmitted.

[0467] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output a baseband signal.

[0468] Furthermore, whether or not to apply DFT processing may also be determined based on the transform precoding configuration. For a particular channel (e.g., PUSCH), if transform precoding is enabled, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as part of the aforementioned transmission process.

[0469] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0470] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0471] The transmitting and receiving unit 220 (receiving processing unit 2212) may also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0472] The transmitting / receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements and CSI measurements based on the received signals. 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), and other information. The measurement results may also be output to the control unit 210.

[0473] In addition, the measurement unit 223 may also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may also be, for example, non-zero power (NZP) CSI-RS resources. In addition, the measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may also be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, and the like. In addition, CSI-IM may also be referred to as CSI-Interference Management (IM) and may be interchangeable with Zero Power (ZP) CSI-RS. In addition, in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeable.

[0474] 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 .

[0475] Alternatively, the control unit 210 may determine an 8-port partially interrelated precoder configured based on at least a portion of the 4-port precoder that is restricted based on rank. The transmitting and receiving unit 220 may also perform uplink transmission based on the 8-port partially interrelated precoder.

[0476] The part of the precoders may also include a specific number of partially interpolated precoders or fully interpolated precoders starting from the smallest transmitted precoding matrix indicator in the correspondence relationship of the existing precoding matrix related to a certain rank.

[0477] The part of the precoders may also include two 4-port precoders whose rank combination follows a certain rule.

[0478] The part of the precoders may include two 4-port precoders of the same rank and the same precoder.

[0479] Furthermore, the control unit 210 may determine an 8-port partially interrelated precoder formed based on at least a portion of the 2-port precoder that is restricted based on rank. The transmitting and receiving unit 220 may also perform uplink transmission based on the 8-port partially interrelated precoder.

[0480] The part of the precoders may also include a specific number of partially interpolated precoders or fully interpolated precoders starting from the smallest transmitted precoding matrix indicator in the correspondence relationship of the existing precoding matrix related to a certain rank.

[0481] The part of the precoders may also include a plurality of 2-port precoders whose rank combinations follow a certain rule.

[0482] The part of precoders may also include at least two 2-port precoders of the same rank and the same precoder.

[0483] (Hardware structure)

[0484] Furthermore, the block diagrams used in the description of the above embodiments illustrate blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. Furthermore, the implementation method of each functional block is not particularly limited. Specifically, each functional block can be implemented using a single device that is physically or logically combined, or by connecting two or more physically or logically separate devices directly or indirectly (e.g., by wired or wireless connections) to implement these multiple devices. A functional block can also be implemented by combining one or more of these devices with software.

[0485] Here, the term "function" includes, but is not limited to, judging, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. For example, a functional block (structural unit) that implements a transmitting function may also be referred to as a transmitting unit, a transmitter, or the like. Any of these terms are as described above, and their implementation methods are not particularly limited.

[0486] 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. Figure 17 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0487] In this disclosure, the terms "device," "circuit," "equipment," "section," and "unit" are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or may exclude some of the devices.

[0488] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0489] 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 by controlling at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0490] Processor 1001 controls the entire computer by, for example, operating an operating system. Processor 1001 may also be comprised of a central processing unit (CPU) including interfaces with peripheral devices, a control device, a computing device, registers, and the like. For example, at least a portion of the aforementioned control unit 110 (210) and transceiver unit 120 (220) may also be implemented by processor 1001.

[0491] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes based on these programs. As a program, a program that causes a computer to execute at least a portion of the operations described in the above 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 executed by the processor 1001, and the other functional blocks can also be implemented similarly.

[0492] Memory 1002 may also be a computer-readable recording medium, such as 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 suitable storage medium. Memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like. Memory 1002 can store executable programs (program code), software modules, and the like for implementing the wireless communication method according to an embodiment of the present disclosure.

[0493] Storage 1003 may also be a computer-readable recording medium, such as at least one of 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 disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, stick, or key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0494] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network. For example, it is also referred to as a network device, a network controller, a network card, a communication module, etc. In order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and the transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.

[0495] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and output device 1006 may be integrated (e.g., a touch panel).

[0496] Furthermore, the processor 1001, 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.

[0497] Furthermore, the base station 10 and 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), or a field programmable gate array (FPGA), and may use this hardware to implement part or all of each functional block. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0498] (Variation)

[0499] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. Reference Signal (RS) may also be referred to as RS, and may also be referred to as Pilot, Pilot Signal, etc. depending on the applied standard. In addition, Component Carrier (CC) may also be referred to as Cell, Frequency Carrier, Carrier Frequency, etc.

[0500] A radio frame can also be composed of one or more time periods (frames) in the time domain. Each of these one or more time periods (frames) that make up a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (for example, 1ms) that is independent of the numerology.

[0501] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, the parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0502] In the time domain, a slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) Furthermore, a slot can also be a time unit based on a parameter set.

[0503] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist 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 PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0504] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-slots, and symbols may also be referred to by their respective equivalents. Furthermore, the time units of frame, subframe, time slot, mini-slot, and symbol in this disclosure may be interchangeable.

[0505] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0506] Here, TTI refers to, for example, the minimum time unit used for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0507] A TTI can also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and can also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, code block, code word, etc. is actually mapped can be shorter than the TTI.

[0508] Furthermore, while a time slot or mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-slots) can also be the minimum time unit for scheduling. Furthermore, the number of time slots (mini-slots) that constitute this minimum time unit for scheduling can also be controlled.

[0509] A TTI with 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 minislot, a subslot, a time slot, etc.

[0510] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than the long TTI and longer than 1ms.

[0511] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0512] 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.

[0513] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0514] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0515] A Bandwidth Part (BWP) (also known as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point for that carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0516] 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 within one carrier.

[0517] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside the activated BWP.

[0518] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length can be varied in various ways.

[0519] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0520] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas used for these parameters may differ from those explicitly disclosed in this disclosure. Various channels (such as PUCCH and PDCCH) 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 intended to be limiting in any respect.

[0521] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

[0522] 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.

[0523] Input and output information, signals, etc. can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. can be overwritten, updated, or appended. Output information, signals, etc. can also be deleted. Input information, signals, etc. can also be sent to other devices.

[0524] The notification of information is not limited to the methods / implementations described in this disclosure and may also be performed using other methods. For example, the notification of information in this 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))), higher 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.

[0525] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), Layer 1 control information (L1 control signal), etc. Furthermore, RRC signaling may also be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0526] 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).

[0527] The determination can be made using a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true or false, or a numerical comparison (eg, comparison with a specific value).

[0528] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0529] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of the wired technology and the wireless technology is included within the definition of a transmission medium.

[0530] The terms "system" and "network" used in this disclosure are interchangeable. "Network" may also refer to devices included in the network (eg, base stations).

[0531] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "layer", "number of layers", "rank", "resource", "resource set", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", "UE panel", "transmitting entity", and "receiving entity" can be used interchangeably.

[0532] Furthermore, in the present disclosure, antenna ports can be interchanged with antenna ports used for any signal / channel (e.g., DeModulation Reference Signal (DMRS) ports). In the present disclosure, resources can be interchanged with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Furthermore, resources can include time / frequency / symbol / space / power resources. Furthermore, a spatial domain transmit filter can include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0533] The above-mentioned groups may also include, for example, at least one of a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (for example, a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.

[0534] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. can also be rewritten.

[0535] In addition, in the present disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), joint TCI state, etc. can also be rewritten with each other.

[0536] In addition, in the present disclosure, "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL characteristics (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) characteristics", "specific QCL type (e.g., type A, type D)", etc. can also be rewritten with each other.

[0537] In the present disclosure, index, identifier (ID), indicator, indication, resource ID, etc. may also be overwritten with each other. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may also be overwritten with each other.

[0538] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can also be overwritten. "Spatial relationship information (TCI state)" can also be overwritten with "a collection of spatial relationship information (TCI state)," "one or more spatial relationship information," and so on. TCI states and TCIs can also be overwritten. Spatial relationship information and spatial relationships can also be overwritten.

[0539] In this 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" are used interchangeably. In some cases, a base station may be referred to as a macrocell, small cell, femtocell, or picocell.

[0540] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the base station's overall coverage area can be divided into multiple smaller areas, each of which can be provided with communications services by a base station subsystem (for example, a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or the entire coverage area of ​​at least one of a base station and a base station subsystem providing communications services within that coverage area.

[0541] In the present disclosure, the base station sending information to the terminal and the base station instructing the terminal to perform control / operation based on the information may be mutually rewritten.

[0542] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0543] The mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or some other appropriate terminology.

[0544] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0545] The mobile object refers to a movable object, and the moving speed can be arbitrary, including situations where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, ships (ships and other watercraft), airplanes, rockets, satellites, drones, multicopters, quadcopters, hot air balloons, and objects aboard such objects. Furthermore, the mobile object may also be one that moves autonomously based on operational instructions.

[0546] The mobile object may be a vehicle (e.g., a car, an aircraft, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0547] Figure 18This figure shows an example of a vehicle according to one embodiment. 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.

[0548] The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also referred to as a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the user's operation of the steering wheel.

[0549] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 included in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0550] As signals from various sensors 50-58, there are the following signals, etc.: a current signal from the current sensor 50 that senses the current of the motor, a speed signal of the front wheel 46 / rear wheel 47 obtained by the speed sensor 51, an air pressure signal of the front wheel 46 / rear wheel 47 obtained by the air pressure sensor 52, a vehicle speed signal obtained by the vehicle speed sensor 53, an acceleration signal obtained by the acceleration sensor 54, a stepping amount signal of the accelerator pedal 43 obtained by the accelerator pedal sensor 55, a stepping amount signal of the brake pedal 44 obtained by the brake pedal sensor 56, an operation signal of the shift lever 45 obtained by the shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 58.

[0551] Information service unit 59 is composed of various devices that provide (output) various types of information, including driving information, traffic information, and entertainment information, such as a navigation system, audio system, speakers, displays, televisions, and radios, and one or more ECUs that control these devices. Information service unit 59 uses information acquired from external devices via communication module 60 and other means to provide various information and services (e.g., multimedia information and multimedia services) to the occupants of vehicle 40.

[0552] 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.).

[0553] The driving assistance system unit 64 is composed of various devices for providing functions for preventing accidents or reducing the driver's driving burden, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning sensors (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyroscope systems (e.g., inertial measurement units (IMUs)), inertial navigation systems (INSs), etc.), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driving assistance system unit 64 transmits and receives various information via the communication module 60 to implement driving assistance functions or autonomous driving functions.

[0554] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 with the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, microprocessor 61 and memory (ROM, RAM) 62 within the electronic control unit 49, and various sensors 50-58 included in the vehicle 40.

[0555] The communication module 60 is controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, various information can be transmitted 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. Examples of external devices include the aforementioned base station 10 and user terminal 20. Furthermore, the communication module 60 can also be, for example, at least one of the aforementioned base station 10 and user terminal 20 (and can function as at least one of the base station 10 and user terminal 20).

[0556] The communication module 60 may also transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58, information obtained based on these signals, and information based on external (user) input received 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, and the like may also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 60 may also include information based on these inputs.

[0557] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it on the vehicle's information service unit 59. The information service unit 59 can also be referred to as an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0558] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like included in the vehicle 40.

[0559] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, the various methods / implementations of this disclosure can also be applied to a structure in which communication between a base station and a user terminal is replaced by communication between multiple user terminals (e.g., device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" can also be rewritten with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channels, downlink channels, etc. can also be rewritten as sidelink channels.

[0560] 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.

[0561] In this disclosure, actions are described as being performed by a base station, and sometimes, depending on circumstances, by its upper node. In a network comprising one or more network nodes including a base station, various operations for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0562] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, timings, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the methods described in this disclosure use an illustrative order to present elements of various steps, but are not limited to the specific order presented.

[0563] The various modes and embodiments 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 IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems based on these that are extended, modified, generated, or specified. Furthermore, multiple systems may be combined for application (for example, LTE or LTE-A combined with 5G).

[0564] The phrase “based on” used in this 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.”

[0565] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not imply that only two elements may be used or that the first element must in some way take precedence over the second element.

[0566] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching a table, database, or other data structure), ascertaining, and the like as performing a "determination."

[0567] In addition, “judgment (decision)” may also refer to situations where receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc. are regarded as “judgment (decision)”.

[0568] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, and the like are considered "judgment (decision)." In other words, "judgment (decision)" can also refer to situations where certain actions are considered "judgment (decision)." In this disclosure, "judgment (decision)" can be interchanged with the aforementioned actions.

[0569] In this disclosure, "determine / determining" can be interchanged with "assume / assuming," "expect / expecting," "consider / considering," and the like. Furthermore, in this disclosure, "not assuming to do..." can be interchanged with "assuming not to do..."

[0570] In the present disclosure, "expect" can be replaced with "be expected". For example, "expect(s) ..." ("..." can also be expressed as a that-clause, a to-infinitive, etc.) can be replaced with "be expected ...". "Does not expect ..." can be replaced with "Does not expect ...". In addition, "An apparatus Ais not expected ..." can be replaced with "An apparatus B other than apparatus A does not expect ..." (for example, when apparatus A is a UE, apparatus B can be a base station).

[0571] The “maximum transmit power” described in this 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).

[0572] As used in this disclosure, the terms "connected," "coupled," and all variations thereof refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between the two elements being "connected" or "coupled." The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" can also be rephrased as "accessed."

[0573] In the present disclosure, when two elements are connected, it is possible to consider them to be "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, they are "connected" or "combined" to each other using electromagnetic energy having a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0574] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same manner as "different."

[0575] When used in this disclosure, "include," "including," and variations thereof have the same inclusive meaning as the term "comprising." Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0576] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0577] In the present disclosure, “below,” “less than,” “above,” “more,” “equal to,” and the like may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other. Furthermore, in the present disclosure, words meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “slow,” “wide,” “narrow,” and the like are not limited to the positive, comparative, and superlative forms, but may be replaced with each other as expressions appended with “the ith” (i is an arbitrary integer) (for example, “the highest” may be replaced with “the ith highest”).

[0578] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may be replaced with each other.

[0579] In this disclosure, expressions such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at / on A," "B after A," "B since A," and "B until A" can be interchanged. Furthermore, A, B, and the like herein can be replaced with nouns, gerunds, or other suitable expressions, depending on the context. Furthermore, the time difference between A and B can be approximately zero (immediately after or immediately before). Furthermore, a time offset can be applied to the time when A occurs. For example, "A" can be interchanged with "before / after the time offset when A occurs." This time offset (for example, one or more symbols / time slot) may be predetermined or determined by the UE based on notified information.

[0580] In the present disclosure, timing, moment, time, time instance, arbitrary time unit (eg, time slot, sub-time slot, symbol, sub-frame), period, occasion, resource, etc. may also be interchangeably written.

[0581] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The disclosure herein is provided for illustrative purposes only and is not intended to limit the inventions disclosed herein in any manner.

Claims

1. A terminal comprising: The control unit determines an 8-port partially interlocked precoder configured based on at least a portion of the 2-port precoders that is restricted based on rank; and The sending unit performs uplink sending based on the 8-port partially interleaved encoder.

2. The terminal according to claim 1, wherein The part of the precoders includes a specific number of partially interpolated precoders or fully interpolated precoders starting from the smallest transmitted precoding matrix indicator in the correspondence relationship of the existing precoding matrix associated with a certain rank.

3. The terminal according to claim 1, wherein: The part of precoders includes a plurality of 2-port precoders whose combinations of ranks follow a certain rule. The terminal according to claim 1 , wherein: The part of precoders includes at least two 2-port precoders of the same rank and the same precoder.

5. A wireless communication method for a terminal, comprising: A step of determining an 8-port partially correlated precoder configured based on at least a portion of the 2-port precoder that is restricted based on rank; and Based on the 8-port partially phased interferometer, an uplink transmission step is performed.

6. A base station comprising: a transmitting unit configured to transmit setting information of an 8-port partial phase precoder configured by determining at least a portion of the 2-port precoders that is restricted based on rank to the terminal; and The receiving unit receives an uplink transmission transmitted based on the 8-port partially interfering encoder.

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