Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is characterized by comprising: a receiving unit that receives downlink control information including information pertaining to a codebook subset indicating a 2-port precoder for each layer; and a control unit that determines, on the basis of the 2-port precoder indicated by the information, that a portion of 8-port for uplink transmission is interleaved with the precoder, the downlink control information including a field corresponding to rank 0. According to one embodiment of the present disclosure, UL transmission using more than four antenna ports can be appropriately controlled.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunication System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and improving the height of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+ (plus), the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[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] The problem that the invention aims to solve

[0008] In Rel.15 NR, up to four layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future NR systems, to achieve higher spectral efficiency, support for UL transmission with more than four layers is under investigation. For example, for Rel.18 NR, maximum 6-rank transmission using six antenna ports, maximum 6-rank transmission using eight antenna ports, or maximum 8-rank transmission are being investigated.

[0009] Existing standards need to support a unified design for the precoding matrix table (codebook) and a unified design for the notification of downlink control information related to the determination of the precoding matrix.

[0010] However, since the aforementioned unified design may hinder the dedicated preferred structure of the precoding matrix or cause an increase in the bit size of downlink control information, there is a concern that the increase in communication throughput may be suppressed.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station capable of appropriately controlling UL transmission using more than four antenna ports.

[0012] Methods for solving problems

[0013] The terminal involved in one aspect of this disclosure is characterized by comprising: a receiving unit for receiving downlink control information, the downlink control information including information related to a codebook subset indicating a 2-port precoder of each layer; and a control unit for determining, based on the 2-port precoder indicated by the information, a partial phase-interference encoder of an 8-port for uplink transmission, the downlink control information including a field corresponding to rank 0.

[0014] Invention Effects

[0015] According to one aspect of this disclosure, it is possible to appropriately control UL transmission using more than four antenna ports. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating an example of a table of precoding matrices W used for single-layer (rank 1) transmission with four antenna ports in Rel.16 NR when the transformation precoder is invalid.

[0017] Figure 2 This is a diagram illustrating an example of a table of precoding matrices W used for 2-layer (rank 2) transmission with 4 antenna ports in Rel.16 NR when the transformation precoder is invalid.

[0018] Figure 3This is a diagram illustrating an example of a table of precoding matrices W used for 3-layer (rank 3) transmission with 4 antenna ports in Rel.16 NR when the transformation precoder is invalid.

[0019] Figure 4 This is a diagram illustrating an example of a table of precoding matrices W used for 4-layer (rank 4) transmission with 4 antenna ports in Rel.16 NR when the transformation precoder is invalid.

[0020] Figure 5A This is a diagram illustrating an example of a table of precoding matrices W used for single-layer (rank 1) transmission with two antenna ports in Rel.16 NR. Figure 5B This is a diagram illustrating an example of a table of precoding matrices W used for 2-layer (rank 2) transmission with 2 antenna ports in Rel.16 NR when the transform precoding is invalid.

[0021] Figure 6 This is a diagram illustrating an example of the correspondence between the field values ​​of precoding information and layer number in Rel.16 NR and the layer number and TPMI.

[0022] Figures 7A to 7C This is a diagram representing the SRI indication or second SRI indication when transmitting based on codebook PUSCH in Rel.17.

[0023] Figure 8 This is a diagram showing an example of an antenna layout with 8 antenna ports.

[0024] Figure 9 This is a diagram illustrating an example of a table used to determine the layer number / TPMI index when supporting more than four antenna ports.

[0025] Figures 10A-10B These are examples of tables representing the precoding matrices W used for 1-layer and 8-layer (rank 1 and 8) transmissions with 8 antenna ports, respectively, when the transform precoding is invalid. Figure 10C This is a diagram illustrating an example of the correspondence between the field values ​​of precoding information and layer number, and the layer number and TPMI.

[0026] Figures 11A-11C This is a diagram of an example of a table showing the precoding matrix W used for Layer 1 (rank 1) transmission with 8 antenna ports when the transformation precoding is invalid. Figures 11D-11F This is a diagram of an example of a table showing the precoding matrix W used for 8-layer (rank 8) transmission with 8 antenna ports when the transformation precoding is invalid.

[0027] Figures 12A-12DThis is a diagram illustrating an example of the correspondence between field values ​​representing precoding information and layer number, and the determined content.

[0028] Figure 13 This is a diagram showing other examples of the correspondence between the field values ​​of precoding information and layer number and the layer number and TPMI.

[0029] Figure 14A This is a diagram illustrating an example of a new 3-layer pre-encoder based on the reuse of an existing 4-port partial phase interference encoder. Figure 14B This is a diagram illustrating an example of a 6-layer precoder based on 4 layers from one coherent group and 2 layers from other coherent groups.

[0030] Figure 15A This is a diagram illustrating an example of a 4-layer precoder based on 2 layers from one coherent group and 2 layers from other coherent groups. Figure 15B This is a diagram illustrating an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups.

[0031] Figure 16A It means Figures 1-4 The graph shows the number of existing 4-port precoders. Figure 16B It means Figures 5A-5B The graph shows the number of existing 2-port precoders.

[0032] Figure 17 This is a diagram illustrating an example of the correspondence between the field values ​​of precoding information and layer number, and the layer number and TPMI.

[0033] Figures 18A-18B It represents N g A graph showing the relationship between rank and layer in =2.

[0034] Figure 19 It is a graph showing the relationship between rank and the number of precoders.

[0035] Figures 20A-20B This is a diagram illustrating the relationship between the rank and the precoder involved in the first embodiment.

[0036] Figure 21 This is a diagram illustrating an example of the DCI field involved in the first embodiment.

[0037] Figure 22 This is a diagram illustrating an example of the association between the rank involved in the second embodiment and field A and field B.

[0038] Figure 23 This is a diagram illustrating other examples of the association between the rank involved in the second embodiment and field A and field B.

[0039] Figure 24This is a diagram illustrating an example of the DCI field involved in the second embodiment.

[0040] Figure 25 This is a diagram illustrating an example of the interpretation of field B in the second embodiment.

[0041] Figure 26 This is a diagram showing the number of precoders per rank involved in the variations of the second embodiment and their association with the index.

[0042] Figures 27A-27B This is a graph showing the relationship between the rank and the number of precoders involved in the third implementation.

[0043] Figure 28 This is a diagram illustrating an example of the correspondence between the field values ​​of precoding information and layer number involved in the third embodiment and the layer number and TPMI.

[0044] Figure 29 This is a diagram illustrating an example of the DCI field involved in the third embodiment.

[0045] Figure 30 It represents N g A diagram illustrating an example of the relationship between rank and layer in =4.

[0046] Figure 31 This is a diagram illustrating an example of the DCI field involved in the fourth embodiment.

[0047] Figure 32 This is a diagram illustrating an example of the interpretation of field B in the fourth embodiment.

[0048] Figure 33 This is a diagram showing the number of precoders for each rank involved in the variations of the fourth embodiment and their association with the index.

[0049] Figure 34 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0050] Figure 35 This is a diagram illustrating an example of the structure of a base station according to one implementation method.

[0051] Figure 36 This is a diagram illustrating an example of the structure of a user terminal involved in one implementation method.

[0052] Figure 37 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal involved in one implementation method.

[0053] Figure 38 This is a diagram illustrating an example of a vehicle involved in one implementation method. Detailed Implementation

[0054] (Control of SRS and PUSCH transmission)

[0055] In Rel.15 NR, the terminal (user terminal, user equipment (UE)) can also receive information used in the transmission of measurement reference signals (e.g., sounding reference signals (SRS)) (SRS configuration information, e.g., parameters in the “SRS-Config” of the RRC control element).

[0056] Specifically, the UE may also receive at least one of the following: information related to one or more SRS resource sets (SRS resource set information, such as “SRS-ResourceSet” of RRC control elements) and information related to one or more SRS resources (SRS resource information, such as “SRS-Resource” of RRC control elements).

[0057] An SRS resource set can also be associated with a specific number of SRS resources (or a specific number of SRS resources can be grouped). Each SRS resource can also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0058] SRS resource set information may also include the SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type, and information about the usage of the SRS.

[0059] Here, the SRS resource type can also represent any of the following: Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), and Aperiodic CSI (A-SRS). Additionally, the UE can periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the DCI's SRS request.

[0060] Furthermore, the usage (“usage” in the RRC parameter, “SRS-SetUse” in the L1 (Layer-1) parameter) can also be, for example, beam management, codebook (CB) or noncodebook (NCB) transmission, antenna switching, etc. SRS for codebook or noncodebook purposes can also be used to determine the precoder for SRI-based or codebook-based uplink shared channel (PUSCH) transmission.

[0061] For example, in codebook-based transmission, the UE can determine the precoder (precoding matrix) used for PUSCH transmission based on the SRI, the Transmitted Rank Indicator (TRI), and the Transmitted Precoding Matrix Indicator (TPMI). In non-codebook-based transmission, the UE can also determine the precoder used for PUSCH transmission based on the SRI.

[0062] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission combo, SRS resource mapping (e.g., time and / or frequency resource location, resource offset, resource period, repetition count, number of SRS symbols, SRS bandwidth, etc.), hop association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0063] Spatial relation information of an SRS (e.g., "spatialRelationInfo" in an RRC information element) can also represent spatial relation information between a specific reference signal and an SRS. This specific reference signal can be at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Channel State Information Reference Signal (CSI-RS) block, and an SRS (e.g., another SRS). An SS / PBCH block can also be referred to as a Synchronization Signal Block (SSB).

[0064] SRS spatial relationship information may also include at least one of the following: SSB index, CSI-RS resource ID, and SRS resource ID, as an index to the aforementioned specific reference signal.

[0065] Furthermore, in this disclosure, the SSB index, SSB resource ID, and SSB resource indicator (SSB Resource Indicator (SSBRI)) can be overridden. Similarly, the CSI-RS index, CSI-RS resource ID, and CSI-RS resource indicator (CSI-RS Resource Indicator (CRI)) can also be overridden. Additionally, the SRS index, SRS resource ID, and SRI can also be overridden.

[0066] The spatial relationship information of SRS may also include the serving cell index, BWP index (BWP ID), etc., corresponding to the specific reference signal mentioned above.

[0067] When a spatial relationship information related to an SSB or CSI-RS and the SRS is configured for a specific SRS resource, the UE can also use the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving that SSB or CSI-RS to transmit that SRS resource. In this case, the UE can also assume that the UE receive beam for the SSB or CSI-RS and the UE transmit beam for the SRS are the same.

[0068] When a spatial relationship information is set between a certain SRS (target SRS) resource and other SRSs (reference SRSs) and the SRS (target SRS), the UE can also use the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS to transmit the target SRS resource. That is, in this case, the UE can also assume that the UE transmission beam for the reference SRS is the same as the UE transmission beam for the target SRS.

[0069] The UE can also determine the spatial relationship of the PUSCH scheduled through the DCI based on the value of a specific field (e.g., the SRS Resource Identifier (SRI) field) within the DCI (e.g., DCI format 0_1). Specifically, the UE can 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.

[0070] In Rel.15 / 16 NR, when using codebook-based transmission for PUSCH, the UE can also be configured via RRC to have a set of SRS resources with a maximum of two SRS resources used for codebook transmission, and one of these two maximum SRS resources will be indicated via DCI (a 1-bit SRI field). The PUSCH transmission beam will be specified via the SRI field.

[0071] The UE can also determine the TPMI and layer number (transmission rank) used for PUSCH based on the precoding information and the layer number field (hereinafter also referred to as the precoding information field). The UE can also select a precoder from the codebook for the uplink with the same number of ports as the number of SRS ports based on the above TPMI, layer number, etc., where the number of SRS ports is represented by the higher layer parameter "nrofSRS-Ports" set for the SRS resources specified by the above SRI field.

[0072] In Rel.15 / 16 NR, when using non-codebook-based transmission for PUSCH, the UE can also be configured via RRC to have a set of SRS resources with a maximum of 4 SRS resources for non-codebook purposes, and be indicated by DCI (2-bit SRI field) for one or more of these maximum 4 SRS resources.

[0073] The UE can also determine the number of layers (transmission rank) used for PUSCH based on the SRI field mentioned above. For example, the UE can also determine that the number of SRS resources specified through the SRI field is the same as the number of layers used for PUSCH. In addition, the UE can also calculate the precoder of the SRS resources mentioned above.

[0074] When a CSI-RS (also referred to as an associated CSI-RS) is configured at a higher level to be associated with the SRS resource (or the SRS resource set to which the SRS resource belongs), the PUSCH transmit beam can be calculated based on the measurements of that configured associated CSI-RS. Otherwise, the PUSCH transmit beam can be specified via SRI.

[0075] Additionally, the UE can be configured via the higher-level parameter "txConfig," which represents the transmission scheme, to use either codebook-based PUSCH transmission or non-codebook-based PUSCH transmission. This parameter can also represent the value of "codebook" or "non-codebook."

[0076] In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) can also refer to PUSCH when the UE is configured with "codebook" as the transmission scheme. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) can also refer to PUSCH when the UE is configured with "non-codebook" as the transmission scheme.

[0077] (Decision of the PUSCH precoder in codebook (CB) based transmission)

[0078] As mentioned above, in the case of codebook-based transmission, the UE can also determine the precoder used for PUSCH transmission based on SRI, TRI, TPMI, etc.

[0079] SRI, TRI, TPMI, etc., can also be notified to the UE using Downlink Control Information (DCI). SRI can be specified either through the Resource Indicator field (SRI field) of the DCI or through the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH.

[0080] TRI and TPMI can also be specified via the DCI precoding information and the layer number field. For simplicity, the precoding information and layer number field are also referred to as the precoding information field.

[0081] The UE can also report UE capability information related to the precoder type, which is configured by the base station via higher-layer signaling based on the UE capability information. This UE capability information can also be information about the precoder type used by the UE in PUSCH transmission (for example, it can also be represented by the RRC parameter "pusch-TransCoherence").

[0082] The UE can also determine the precoder to use in PUSCH transmission based on the precoder type information (e.g., the RRC parameter "codebookSubset") included in the PUSCH configuration information (e.g., the "PUSCH-Config" information element in RRC signaling) notified via higher-layer signaling. The UE can also be configured with a subset of the PMIs specified by the TPMI via the codebookSubset.

[0083] Additionally, the precoder type can also be specified by any one of fully coherent, partially coherent, and non-coherent, or a combination of at least two of them (for example, it can also be represented by parameters such as "fullyAndPartialAndNonCoherent" or "partialAndNonCoherent").

[0084] For example, the RRC parameter "pusch-TransCoherence" representing UE capabilities can also be displayed as full Coherent, partial Coherent, or non-Coherent. Furthermore, the RRC parameter "codebookSubset" can also be displayed as "fully And Partial And Non-Coherent", "partial And Non-Coherent", or "non-Coherent".

[0085] Fully coherent can also mean that synchronization has been achieved across all antenna ports used in transmission (or, in other words, that phase consistency can be achieved, phase control can be performed on each coherent antenna port, and precoders can be appropriately applied on each coherent antenna port). Partially coherent can also mean that synchronization has been achieved among a subset of antenna ports used in transmission, but this subset is not synchronized with the other ports. Incoherent can also mean that synchronization has not been achieved among the antenna ports used in transmission.

[0086] Furthermore, a UE that supports fully coherent precoder types can also be envisioned as supporting partially coherent and non-coherent precoder types. A UE that supports partially coherent precoder types can also be envisioned as supporting non-coherent precoder types.

[0087] In this disclosure, precoder type, coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, and codebook subset type are interchanged.

[0088] The UE can also determine the precoding matrix corresponding to the TPMI index obtained from the DCI (e.g., DCI format 0_1, hereinafter the same) sent according to the multiple precoders (also referred to as precoding matrices, codebooks, etc.) used for CB-based transmission.

[0089] Figure 1 This is a diagram illustrating an example of the association between a codebook subset and the TPMI index. Figure 1 This corresponds to the table in Rel.16 NR showing the precoding matrix W used for single-layer (rank 1) transmission with 4 antenna ports when transform precoding (also known as transform precoder) is invalid. Figure 1 The corresponding W(s) are shown in ascending order of the TPMI index from left to right. Figure 2 It's the same.

[0090] Figure 1 The diagram showing the correspondence between TPMI indices and their corresponding W values ​​(also known as a table) is called a codebook. A portion of this codebook is also called a codebook subset.

[0091] exist Figure 1 In the case of a codebook subset that is fully, partially, and noncoherent, for single-layer transmission, the UE is notified of any TPMI (TPMI index) from 0 to 27. Furthermore, in the case of a codebook subset that is partially and noncoherent, for single-layer transmission, the UE is set to any TPMI from 0 to 11. In the case of a noncoherent codebook subset, for single-layer transmission, the UE is set to any TPMI from 0 to 3.

[0092] exist Figure 1 In the case of a TPMI of 0 to 3, an incoherent precoder is applied. In the case of a TPMI of 4 to 11, a partially coherent precoder is applied. In the case of a TPMI of 12 to 27, a fully coherent precoder is applied.

[0093] Figures 2-4 These are tables corresponding to the precoding matrices W used for 2-4 layer (rank 2-4) transmission with 4 antenna ports in Rel.16 NR when the transform precoding is invalid.

[0094] according to Figure 2 The TPMI notified to the UE for Layer 2 transmission is from 0 to 21 (codebook subset is full, partial and incoherent), from 0 to 13 (codebook subset is partial and incoherent), or from 0 to 5 (codebook subset is incoherent).

[0095] according to Figure 3 The TPMI notified to the UE for Layer 3 transmission is from 0 to 6 (codebook subset is full, partial and incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0096] according to Figure 4 The TPMI notified to the UE for Layer 4 transmission is from 0 to 4 (codebook subset is full, partial and incoherent), from 0 to 2 (codebook subset is partial and incoherent) or 0 (codebook subset is incoherent).

[0097] Figure 5A This corresponds to the table of precoding matrices W used for single-layer (rank 1) transmission with 2 antenna ports in Rel.16 NR. Figure 5B This corresponds to the table in Rel.16 NR showing the precoding matrix W used for 2-layer (rank 2) transmission with 2 antenna ports when the transform precoding is invalid.

[0098] according to Figure 5A For UE-to-port single-layer transmission, the notified TPMI is either 0 to 5 (codebook subset includes full, partial, and incoherent components) or 0 to 1 (codebook subset includes incoherent components). When the notified TPMI is 0 to 1, an incoherent precoder is applied. When the notified TPMI is 2 to 5, a fully coherent precoder is applied.

[0099] according to Figure 5B The TPMI notified to the UE for the 2-port 2-layer transmission is from 0 to 2 (codebook subset is full, partial and incoherent) or 0 (codebook subset is incoherent).

[0100] Furthermore, a precoding matrix in which only one element in each column is non-zero can also be called an incoherent codebook. A precoding matrix in which only a certain number (greater than one, but not all elements in the column) of non-zero elements in each column 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.

[0101] Incoherent codebooks and partially coherent codebooks can also be referred to as antenna selection precoders, antenna port selection precoders, etc. For example, an incoherent codebook (non-phase interference encoder) can also be referred to as a 1-port selection precoder, a 1-port port selection precoder, etc. Furthermore, a partially coherent codebook (partial phase interference encoder) can 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 can also be referred to as a non-antenna selection precoder, a full-port precoder, etc. In this disclosure, the codebook, a subset of the codebook, and the precoder can also be rewritten interchangeably.

[0102] Additionally, in this disclosure, a partially coherent codebook may also correspond to the following codebook: a codebook (precoding matrix) from the codebook (precoding matrix) corresponding to the TPMI specified by the DCI for codebook-based transmission of UEs with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent"), after removing the codebook corresponding to the TPMI specified by UEs with a non-coherent codebook subset (e.g., RRC parameter "codebookSubset" = "nonCoherent") (i.e., codebooks with TPMI = 4 to 11 if it is a single-layer transmission with 4 antenna ports).

[0103] Additionally, in this disclosure, a fully coherent codebook can also correspond to the following codebook: a codebook (precoding matrix) from which the codebook corresponding to the TPMI specified by the DCI for codebook-based transmission of UEs with a fully coherent codebook subset (e.g., RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") is removed, after removing the codebook corresponding to the TPMI specified by UEs with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") (i.e., codebooks with TPMI = 12 to 27 for single-layer transmission with 4 antenna ports).

[0104] In addition, according to Figure 5A as well as Figure 5B It is known that since there is no partial phase interference encoder for the 2-antenna port transmission, the setting that the codebook subset is partial and incoherent for the 2-antenna port can also be omitted.

[0105] (Pre-encoded information field)

[0106] As mentioned above, the UE can also determine the TPMI and layer number (transmission rank) used for the PUSCH based on the precoding information field of the DCI (e.g., DCI format 0_1 / 0_2) of the scheduled PUSCH.

[0107] Regarding codebook-based PUSCH, the number of bits in the precoding information field can also be determined (and can be varied) based on settings such as the validity of the transform precoder used for PUSCH (e.g., the higher-layer parameter transformPrecoder), the setting of the codebook subset used for PUSCH (e.g., the higher-layer parameter codebookSubset), the setting of the maximum number of layers used for PUSCH (e.g., the higher-layer parameter maxRank), the setting of uplink full-power transmission used for PUSCH (e.g., the higher-layer parameter ul-FullPowerTransmission), and the number of antenna ports used for PUSCH.

[0108] Figure 6 This diagram illustrates an example of the correspondence between the precoding information and layer number field values ​​in Rel.16 NR, and the layer number and TPMI. This example shows the correspondence for the 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 set, is set to full-power mode 2, or is set to full power, but is not limited to this. Furthermore, those skilled in the art will clearly understand that the "bit field mapped to index" in the diagram represents the precoding information and layer number field values.

[0109] exist Figure 6 In this context, the precoding information field is 6 bits when the UE is set to a fully coherent (fully And Partial And Non Coherent) codebook subset, 5 bits when it is set to a partially coherent (partial And Non Coherent) codebook subset, and 4 bits when it is set to a non Coherent (non Coherent) codebook subset.

[0110] In addition, such as Figure 6 As shown, the layer number and TPMI corresponding to the value of a certain precoding information field can also be the same (common) as the codebook subset assigned to the UE, regardless of its specificity. For example, in Figure 6In this context, the precoding information field value (0-11) indicates the layer number, and TPMI can also be the same for fully coherent (fully And Partial And Non-Coherent), partially coherent (partial And Non-Coherent), and non-coherent codebook subsets. Furthermore, in... Figure 6 In this context, the value of the precoding information field = 0-31, indicating the number of layers, and the TPMI for fully coherent (fullyAndPartialAndNonCoherent) and partially coherent (partialAndNonCoherent) codebook subsets can also be the same.

[0111] Additionally, for non-codebook-based PUSCH, the precoding information field can also be 0 bits. Furthermore, for codebook-based PUSCH at a single antenna port, the precoding information field can also be 0 bits.

[0112] (SRS settings for PUSCH based on the codebook)

[0113] Figure 7A This indicates that ul-FullPowerTransmission in Rel.17 is not set, or ul-FullPowerTransmission=fullpowerMode1, or ul-FullPowerTransmission=fullpowerMode2, or ul-FullPowerTransmission=fullpower and N SRS A diagram showing the SRI indication or second SRI indication during codebook-based PUSCH transmission when the value is 2. Figure 7B This means that in Rel.17, ul-FullPowerTransmission=fullpowerMode2 and N SRS A diagram of SRI indication or second SRI indication for codebook-based PUSCH transmission when =3. Figure 7C This means that in Rel.17, ul-FullPowerTransmission = fullpowerMode2 and N SRS A diagram of SRI indication or second SRI indication for PUSCH transmission based on codebook when =4.

[0114] 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. When txConfig=nonCodeBook, is set via srs-ResourceSetToAddModList, and two SRS resource sets associated with the purpose of "nonCodeBook" exist, or when txConfig=codebook, is set via srs-ResourceSetToAddModList, and two SRS resource sets associated with the purpose of "codebook" exist, the SRS resource set indicator field is 2 bits. Otherwise, the SRS resource set indicator field is 0 bits.

[0115] When the high-level parameter txConfig=codebook is used, follow Figures 7A-7C The SRS resource indicator field is [log2(N SRS Bits. N SRS This refers to the number of SRS resources set within the SRS resource set, indicated by the SRS resource set indicator field (if present). Otherwise, N... SRS The number of SRS resources set within the SRS resource set configured via the high-level parameter srs-ResourceSetToAddModList, associated with the usage of the high-level parameter 'codeBook'.

[0116] In codebook-based transmission, PUSCH is scheduled or semi-fixed using DCI format 0_0, DCI format 0_1, and DCI format 0_2. Only one or two SRS resource sets can be set in the SRS-ResourceSetToAddModList with the higher-level parameter "codebook" of the SRS-ResourceSet. Furthermore, only one or two SRS resource sets can be set in the srs-ResourceSetToAddModListDCI-0-2 with the higher-level parameter "codebook" of the SRS-ResourceSet.

[0117] In srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, when the purpose of the high-level 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 given respectively through two SRS resource indicator fields and two precoding information fields.

[0118] The UE follows the associated SRS resource set of PUSCH repetitions and applies the indicated SRI(s) and TPMI(s) to more than one PUSCH repetition. When two SRS resource sets are set in SRS-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, and the purpose of the higher-level parameters of SRS-ResourceSet is set to "codebook", the UE does not expect different numbers of SRS resources to be set in the two SRS resource sets.

[0119] In codebook-based transmission, it is also possible to indicate only one SRS resource from within the SRS resource set based on the SRI. Except when the higher-layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", the maximum number of SRS resources configured for codebook-based transmission is 2. When an aperiodic SRS is configured for the UE, the SRS request field of the DCI triggers the transmission of the aperiodic SRS resource.

[0120] Except when the higher-level parameter “ul-FullPowerTransmission” is set to “fullpowerMode2”, when multiple SRS resources are set to “codebook” through SRS-ResourceSet, the UE expects the higher-level parameter “nrofSRS-Port” for the SRS-Resource within the SRS-ResourceSet to be set to the same value for all of these SRS resources.

[0121] When the high-level parameter “ul-FullPowerTransmission” is set to “fullpowerMode2”, apply the following (1) to (3).

[0122] (1) The UE can set one SRS resource or multiple SRS resources with the same or different number of SRS ports within an SRS resource set whose purpose is set as "codebook".

[0123] (2) When multiple 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 purpose is set as "codebook".

[0124] (3) Depending on the UE’s capabilities, a maximum of two or four SRS resources can be supported in an SRS resource set whose purpose is set as “codebook”.

[0125] In the typical codebook-based PUSCH scenario, an SRS resource set can be configured with two SRS resources having the same number of ports. Alternatively, in the case of repeated codebook-based PUSCH (for multiple Transmission / Reception Points (TRPs)), two SRS resource sets with the same number of SRS resources can be configured separately. In the case of "fullpowerMode2" in the codebook, SRS resources with the same or different numbers of ports can be configured within a single SRS resource set.

[0126] (Transmission from more than 4 antenna ports)

[0127] In Rel.15 / 16 NR, up to four layers of uplink (UL) multi-input multi-output (MIMO) transmission are supported. For future wireless communication systems, to achieve higher spectral efficiency, research is underway to support UL transmission with more than four layers. For example, for Rel.18 NR, research is being conducted on maximum 6-rank transmission using six antenna ports, and maximum 6- or 8-rank transmission using eight antenna ports.

[0128] Figure 8 This diagram illustrates an example of an antenna layout with 8 antenna ports. Ng is the number of antenna groups. M is the number of antennas (or antenna elements) in the first dimension, and N is the number of antennas (or antenna elements) in the second dimension. The first and second dimensions can be, for example, the horizontal and vertical directions. P is the number of polarization planes. When P=2, it is called a cross-polarized antenna.

[0129] Antenna groups can also be called coherent groups. A coherent group can include more than one coherent port. For example, a partially coherent UE can also have multiple coherent groups. Antenna ports within a coherent group can be coherent. Antenna ports between different coherent groups can be incoherent.

[0130] Each coherent group can 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 can also specifically correspond to an SRS resource set used as a codebook or not. Furthermore, each coherent group can also correspond to a different receive TRP. Additionally, coherent groups can also be referred to as coherent antenna groups, port groups, antenna sets, etc.

[0131] The UE can also report the supported antenna groups / antenna configuration information / coherence count as UE capability information. In addition, the UE can also have coherence groups configured via higher-layer signaling (e.g., the number of coherence groups and the number of ports contained in each coherence group).

[0132] In addition, the antenna layout is not limited to Figure 8 The example shown. For example, the number of panels with antennas, the orientation of the panels, the coherence of each panel / antenna (fully coherent, partially coherent, incoherent, etc.), the specific orientation of the antenna array (horizontal, vertical, etc.), and the polarization antenna structure (single polarization, cross polarization, number of polarization surfaces, etc.) can also be related to... Figure 7AThis differs from the example of 7B. dG-H and dG-V represent the horizontal and vertical spacing between the centers of adjacent antenna groups, respectively.

[0133] Furthermore, following the support for transmitting a single codeword (CW) within a PUSCH in Rel.15 / 16 NR, research is underway for Rel.18 NR to allow UEs to transmit more than one CW within a PUSCH. For example, support for transmitting two CWs for ranks 5-8, and for transmitting two CWs for ranks 2-8, are being investigated.

[0134] Furthermore, in Rel.15 and Rel.16 UEs, it was envisioned that only one beam / panel would be 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 is being investigated for TRPs of 1 and above. Additionally, simultaneous PUSCH transmission of multiple beams / panels can correspond to PUSCH transmission with more than 4 layers, or to PUSCH transmission with fewer than 4 layers.

[0135] Furthermore, research is underway on precoding matrices for UL transmission using more than four antenna ports (more than four antenna ports in total). For example, codebooks for 8-port transmission (also known as 8-transmission UL codebooks, etc.) are being investigated.

[0136] (Precoding matrix table)

[0137] For example, for a UL transmission at layer i (e.g., i=1, 2, ..., 8) for an 8Tx / antenna port, a precoding matrix (or TPMI matrix) and TPMI index (or precoding matrix table) can also be introduced / supported per layer i.

[0138] In this case, in a non-interventional encoder (e.g., a 1-port selection precoder), the number of precoders in layer i is X. NC,i In this case, the corresponding incoherent TPMI index can also be 0~X. NC,i -1.

[0139] Furthermore, in partially phase-intervention encoders (e.g., x-port portselection precoders (x=2 / 4 / 6)), the number of precoders in layer i is X. PC,i In this case, the TPMI index corresponding to partial coherence can also be X.NC,i ~(X) NC,i +X PC,i -1).

[0140] Furthermore, in a fully phase-interventional encoder, the number of pre-encoders in layer i is X. FC,i In the case of complete coherence, the corresponding TPMI index can also be (X NC,i +X PC,i )~(X NC,i +X PC,i +X FC,i -1-1).

[0141] Figure 9 This is a diagram illustrating an example of a table used to determine the layer number / TPMI index when supporting more than four antenna ports. More specifically, Figure 9 This is a diagram illustrating an example of the association (or table) between code points of specific fields of DCI (e.g., precoding information and layer number segments) and the layer number / TPMI index.

[0142] exist Figure 9 The diagram illustrates the cases with 8 antenna ports, a disabled precoder, and a maximum rank (e.g., maxRank) of 2, 3, 4, 5, 6, 7, or 8. Furthermore, Figure 9 It can also be applied when full power transmission (e.g., ul-FullPowerTransmission) is not set, or full power mode 2 (e.g., fullpowerMode2) is set, or full power (e.g., fullpower) is set.

[0143] The bit size of a specific field in the DCI can be defined differently for each subset of codebooks. Furthermore, within each subset of codebooks, the bit size can also be defined / set differently based on the maximum rank (e.g., maxRank).

[0144] Figure 9 The left part corresponds to the case where the codebook subset is noncoherent. Figure 9 The central part corresponds to the case where the codebook subset is partial and noncoherent. Figure 9 The right side corresponds to the cases where the codebook subset is fully, partially, and noncoherent.

[0145] In addition, Figure 9The diagram illustrates the case where the number of code points (or bit size) corresponding to the layer number / TPMI index is less than that of other codebook subsets (e.g., partialAndNonCoherent / fullyAndPartialAndNonCoherent) when the codebook subset is noncoherent. Furthermore, it illustrates the case where the number of code points (or bit size) corresponding to the layer number / TPMI index is less than that of other codebook subsets (e.g., fullyAndPartialAndNonCoherent) when the codebook subset is both partial and noncoherent.

[0146] When the codebook subset is noncoherent, more than one TPMI index is defined for each layer. For example, for layer i, it can also be mapped / assigned to X. NC,i TPMI index. X NC,i It can also be the number of incoherent precoders corresponding to layer i.

[0147] When the codebook subset is partially and noncoherent, for each layer, in addition to the TPMI index corresponding to noncoherence, a TPMI index corresponding to partially coherent content is also defined. For example, for layer i, besides X... NC,i In addition, it can also be corresponding / set X PC,i TPMI index. X PC,i It can also be the number of partially coherent precoders corresponding to layer i.

[0148] When the codebook subset is fully, partially, and noncoherent, for each layer, in addition to the TPMI indices corresponding to noncoherence and partially coherence, a TPMI corresponding to fully coherence is also defined. For example, for layer i, besides X... NC,i and X PC,i In addition, it can also be corresponding / set X FC,i TPMI index. X FC,i It can also be the number of fully coherent precoders corresponding to layer i.

[0149] The number of TPMI indices (or precoders) supported for each layer can also be set separately. For example, as the number of layers increases, the number of TPMI indices (or precoders) supported can be set to be less. In this case, the number of TPMI indices supported can also be the same for a subset of layers.

[0150] In this way, the code points corresponding to the layer number / TPMI index in the codebook subset that is noncoherent can also be applied (or set to be the same) in the codebook subset that is partial and noncoherent. Furthermore, the code points corresponding to the layer number / TPMI index in the codebook subset that is partial and noncoherent can also be applied (or set to be the same) in the codebook subset that is fully and partially and noncoherent.

[0151] In this way, when UL supports 8 antenna ports / layers, the correspondence between at least a portion of the code points of a specific field of DCI and the layer number / TPMI index is set in a common manner across multiple codebook subsets. This allows for the suppression of increased overhead in specific fields of DCI.

[0152] The layer number and TPMI index are indicated to the UE through the code points (or field indices) of specific fields in the DCI. The UE can also determine the layer number / TPMI index (or precoding matrix) used in UL transmission based on the values ​​of the code points in specific fields of the DCI. The base station can also indicate the layer number / TPMI index (or precoding matrix) used in UL transmission to the UE through the code points of specific fields in the DCI.

[0153] Figure 9 The table shown can also be applied in specific situations. For example, it can be applied when 8 antenna ports / Tx / layers are configured for UL transmission via RRC / MAC CE / DCI (e.g., PUSCH / SRS). Figure 9 The table. In other cases, tables for 2 or 4 antenna ports may also be used (e.g., tables defined prior to Rel.16).

[0154] In addition, Figure 9 The diagram illustrates a combination of code points (or field indices) for a specific field of the DCI, layer number, and TPMI index, but is not limited to this. Alternatively, the structure can be configured to map the layer number and TPMI index separately (or instruct them separately to the UE).

[0155] For an 8-antenna port, the number of TPMIs (or precoders) supported in each layer (e.g., layer i) X NC,i X PC,i X FC,i It can also be set via RRC / MAC CE. In this case, the bit size of specific fields of the DCI (e.g., precoding information and layer digital segments) can also be set to be the same as other antenna ports (e.g., 4-antenna ports).

[0156] Alternatively, the bit size of a specific field of the DCI corresponding to an 8-antenna port and the bit size of a specific field of the DCI corresponding to other antenna ports (e.g., a 4-antenna port) can also be set separately (e.g., set differently).

[0157] in addition, Figure 9 The table shown represents the cases where the maximum rank is 2, 3, 4, 5, 6, 7, or 8 for an 8-antenna port, but is not limited to these. Tables for 8-antenna ports where the maximum rank is less than 8 (e.g., 2, 3, 4, 5, 6, 7) can also be defined / set differently. In this case, it can also be set to a table structure corresponding to a codebook subset of 2 or 3.

[0158] In the specifications to date, such as Figure 6 As shown, a layer number (up to 4 layers) and a TPMI index can be specified to the UE through a precoding information field. For transmission via more than 4 antenna ports, the use of [unclear - likely a specific technology or method] is under investigation. Figure 6 Different tables, through a pre-coded information field, specify a layer number (maximum 8 layers) and a TPMI index to the UE. In this case, for example... Figure 1 A table of precoding matrix W as shown, if the table is specified to have a rank greater than 4, can achieve 8-port transmission based on the number of layers being notified and the TPMI index.

[0159] Referring to Figure 10, a generalized table for 8-port transmission is explained. Figures 10A-10B These are examples of tables representing the precoding matrices W used for 1-layer and 8-layer (rank 1 and 8) transmissions with 8 antenna ports, respectively, when the transformation precoding is invalid.

[0160] In this example (and the same figures thereafter), X i (i is the layer number) represents the number of non-phase interference encoders used for layer i, Y i Z represents the number of partial phase interference encoders used for layer number i. i This indicates the number of fully phase-intervention encoders used for layer number i. Additionally, X is shown in Figure 10 onwards. i Yi Z i They can correspond to respectively Figure 9 X in NC,i X PC,i X FC,i .

[0161] like Figure 10A as well as Figure 10B As shown, the codebook for layer i includes X i +Y i +Z i A precoder, based on this codebook, enables incoherent UEs to operate according to the TPMI index (from 0 to X). i -1) Reference X i A precoder, partially coherent UE can be based on TPMI index (from 0 to X) i +Y i -1) Reference X i +Y i A precoder, a fully coherent UE can be based on the TPMI index (from 0 to X) i +Y i +Z i -1) Reference X i +Y i +Z i One precoder.

[0162] Figure 10C This is a diagram illustrating an example of the correspondence between field values ​​representing precoding information and layer number, and the corresponding layer number and TPMI. This example's correspondence is for an 8-antenna port when the precoder is set to invalid, the maximum rank (maxRank) is set to a value greater than 5, and the uplink is not set to full power transmission, or is set to full power mode 2, or is set to full power, but it is not limited to this. Figure 10C and Figure 6 It is the same, but it is also possible to specify more than 5 layers. Furthermore, in Figure 10C In this context, the non-interventional encoder can use field values ​​(bit fields mapped to the index) ranging from 0 to 2. N1 And thus instructed. Partial phase interference encoders can be accessed via field value = 2. N1 +1~2 N2 And thus instructed. The fully phase-intervention encoder can be accessed via a field value of 2. N2 +1~2 N3 And are indicated. In addition, N1~N3 can be integers.

[0163] That is, when the codebook subset is noncoherent, use field values ​​of 0 to 2. N1Furthermore, in cases where the codebook subset is partial and non-coherent, field values ​​of 0 to 2 are used. N2 Furthermore, when the codebook subset is fully, partially, and non-coherent, the field value is set to 0-2. N3 .

[0164] For example, such as Figure 2 As shown in Figure 5, the existing codebook includes multiple (corresponding to all) phase interference encoders based on the TPMI index.

[0165] The new codebook subset may also include at least one codebook subset used only for fully phase-intervention encoders and a codebook subset used only for partially phase-intervention encoders. The new codebook subset may also include a codebook subset used only for non-phase-intervention encoders. In other words, the new codebook subset may also refer to a codebook subset used for single coherence (or single coherence).

[0166] For example, a fully coherent UE can also be configured to indicate setting information for a subset of the codebook used only by a fully coherent encoder (e.g., the RRC parameter "codebookSubset" indicating "fully coherent" or "fully coherentOnly").

[0167] In addition, the partially coherent UE can also be configured to indicate the setting information of the codebook subset used only for the partially coherent encoder (e.g., the RRC parameter "codebookSubset" indicating "partial coherent" or "partial coherent only").

[0168] Referring to Figure 11, the case of codebooks (tables of precoding matrices) that are defined differently according to each coherence type (e.g., according to the coherence type of each UE / each set subset of codebook types) is illustrated.

[0169] Figures 11A-11C This is a diagram of an example of a table showing the precoding matrix W used for Layer 1 (rank 1) transmission with 8 antenna ports when the transformation precoding is invalid. Figure 11A , Figure 11B , Figure 11C These correspond to the cases where the UE is set to be used only for the codebook subset of the non-coherent encoder, the codebook subset of the partial coherent encoder, and the codebook subset of the fully coherent encoder, respectively.

[0170] Figures 11D-11F This is a diagram of an example of a table showing the precoding matrix W used for 8-layer (rank 8) transmission with 8 antenna ports when the transformation precoding is invalid. Figure 11D , Figure 11E , Figure 11F These correspond to the cases where the UE is set to be used only for the codebook subset of the non-coherent encoder, the codebook subset of the partial coherent encoder, and the codebook subset of the fully coherent encoder, respectively.

[0171] In this example, the codebook for the non-interventional encoder oriented towards layer i includes X. i A precoder, based on this codebook, enables non-coherent UEs to refer to the TPMI index X. i One pre-encoder. In addition, the codebook for the partial phase interference encoder oriented towards layer i includes Y. i A precoder, based on this codebook, enables some coherent UEs to reference Y according to the TPMI index. i One pre-encoder. Furthermore, the codebook for the fully phase-intervention encoder, oriented towards layer i, includes Z. i A precoder, based on this codebook, enables fully coherent UEs to reference Z according to the TPMI index. i One precoder.

[0172] For convenience, the table used for the codebook of the i-th layer for non-phase-interference encoders will be called Table #iA, the table used for the codebook of the i-th layer for partially phase-interference encoders will be called Table #iB, and the table used for the codebook of the i-th layer for fully phase-interference encoders will be called Table #iC. In each table, the TPMI index can also start from 0.

[0173] In addition, such as Figures 11A-11F As shown, the tables used in each new codebook subset are not separated. Figure 10A , Figure 10B The table shown, which includes full / partial / non-interventional encoders, can also be publicly used for new codebook subsets.

[0174] In existing NRs, for example, such as Figure 6As shown, according to the codebook subset assigned to the UE, the correspondence (e.g., a table) between the values ​​of the precoding information fields and the layer number and TPMI is determined. Based on this correspondence, the UE determines the layer number and TPMI index corresponding to the specified precoding information field. Based on this layer number, the UE determines the table (codebook) to be referenced in order to determine the precoding matrix. In existing NRs, this correspondence cannot be associated with codebooks used only for fully phase-intervention encoders, codebooks used only for partially phase-intervention encoders, etc.

[0175] New correspondences as described above can also be defined that differ for each coherence type / precoder (e.g., for each UE coherence type / each set of codebook subset type).

[0176] For noncoherent UE / precoder / codebook subsets, the new correspondence may also include rows representing the layer number and (only for noncoherent encoders in the table of precoding matrices from layer 1 to layer 8) TPMI indexes.

[0177] Additionally, in this disclosure, the term "correspondence including row" can also mean that the entry (or element, such as a layer number or TPMI index) represented by that row is associated with an index (row index, such as the value of a precoded matrix field) used for that correspondence.

[0178] For a subset of fully coherent UE / precoder / codebook, the new correspondence may also include a line representing at least one of the following:

[0179] • Grouping of layer number with TPMI indexes (in the table of precoding matrices from layer 1 to 8 for fully phase-intervention encoders only);

[0180] • Number of layers and (i 1,1 i 1,2 i2 and i 1,3 A group of sets of ).

[0181] Here, (i 1,1 i 1,2 i2 and i 1,3 The set of indices can also be used, for example, to determine the precoder when the precoder W of a DL type I single-panel codebook is used as an 8TX UL fully phase-intervention encoder. 1,1 i 1,2 i2 and i 1,3 It can also be the same as the definition of a single-panel codebook for DL ​​type I.

[0182] For a subset of coherent UE / precoder / codebook, the new correspondence may also include a line representing at least one of the following:

[0183] • Grouping of layer number with TPMI indexes (in the table of precoding matrices from layer 1 to layer 8 for partial phase interference encoders only);

[0184] • A group of layers (for different coherence groups) and a group of TPMI indexes.

[0185] • Multiple layers / multiple TPMI indexes (for different coherence groups).

[0186] Additionally, for subsets of coherent UEs / precoders / codebooks, new mappings may not need to be defined. In this case, for example, a partially coherent UE may reuse more than one existing precoder to determine the 8-port precoder.

[0187] Figures 12A-12D This is a diagram illustrating an example of the correspondence between field values ​​representing precoding information and layer number, and the determined content. This example's correspondence is used for an 8-antenna port when the precoder is set to invalid, the maximum rank (maxRank) is set to no more than 8, and the uplink is not set to full power transmission, or is set to full power mode 2, or is set to full power, but it is not limited to this.

[0188] Figure 12A This indicates the mapping used by the UE for a subset of the codebook configured only for non-coherent encoders. Figure 12A In the correspondence, the tier number indicator and the corresponding TPMI index are determined. The TPMI index refers to the TPMI index in table #iA, where i corresponds to the aforementioned tier number indicator.

[0189] Figure 12B This indicates the mapping used by the UE for a fully coherent subset of the codebook configured only for the fully coherent encoder. Figure 12B In the correspondence, the stratum number indicator and the corresponding TPMI index are determined. The TPMI index refers to the TPMI index in table #iC, where i corresponds to the aforementioned stratum number indicator.

[0190] Figure 12C This indicates the mapping used by the UE for a subset of the codebook (partial Coherent) configured only for partial coherent encoders. Figure 12C In the correspondence, the stratum number indicator and the corresponding TPMI index are determined. The TPMI index refers to the TPMI index in table #iB, where i corresponds to the aforementioned stratum number indicator.

[0191] Additionally, codebook subsets configured for use only with non / partial / full phase interference encoders can be rewritten with codebook subsets configured for use only with non / partial / full phase interference encoders via DCI / MAC CE. Figures 12A-12C The example is appropriate when the UE can only be configured with a new codebook subset, but if the UE can be configured with multiple new codebook subsets, it cannot be directly utilized if any of the multiple new codebook subsets are indicated using a DCI field (e.g., also known as a codebook subset specification field, etc.) / MAC CE.

[0192] The correspondence between various coherence types can also be obtained through Figure 6 The table shown is a general definition.

[0193] Figure 12D This is a diagram illustrating an example of the correspondence between precoding information, layer number field values, and the determined content. In this example, the correspondence is equivalent to... Figure 6 The table is obtained by replacing the fully coherent codebook subset (fullyAndPartialAndNonCoherent) with the fully Coherent codebook subset used only for the fully coherent encoder, and replacing the partially coherent codebook subset (partialAndNonCoherent) with the partially Coherent codebook subset used only for the partially coherent encoder. Additionally, the number of bits mapped to the index bit field can also differ from the table. Figure 6 .

[0194] Specifically, in Figure 12D In this context, the non-interventional encoder can use field values ​​(bit fields mapped to the index) ranging from 0 to 2. N1 And thus instructed. Partial phase interference encoders can be controlled via field values ​​= 0~2 N4 And thus instructed. The fully phase-intervention encoder can be configured via field values ​​= 0~2. N5 And are instructed. In addition, N1, N4, and N5 can be integers.

[0195] Figure 12D The part of the correspondence only for non-interference encoders can also be equivalent to Figure 12A The correspondence. Figure 12D The part that only addresses the correspondence of fully phase-intervention encoders can also be equivalent to Figure 12B The correspondence. Figure 12D The part of the correspondence between the partial phase interference encoder and the partial phase interference encoder can also be equivalent to Figure 12C The correspondence.

[0196] Figure 13This is a diagram showing other examples of the correspondence between the field values ​​of precoding information and layer number and the layer number and TPMI. Figure 13 The table shows in Figure 12D The table shows an example of dividing a partially coherent codebook subset into Ng=2 and Ng=4 and then expanding it.

[0197] Specifically, in Figure 13 In this context, the non-interventional encoder can use field values ​​(bit fields mapped to the index) ranging from 0 to 2. N1 And thus instructed. The partial phase interference encoder corresponding to Ng=2 can be configured via field values ​​= 0~2. N4_Ng2 And thus instructed. The partial phase interference encoder corresponding to Ng=4 can be configured via field values ​​= 0~2. N4_Ng4 And thus instructed. The fully phase-intervention encoder can be configured via field values ​​= 0~2. N5 And are instructed. In addition, N1, N4_Ng2, N4_Ng4, and N5 can be integers.

[0198] like Figure 13 As shown, the partial phase interference encoders corresponding to Ng=2 and the partial phase interference encoders corresponding to Ng=4 can also be defined separately in their respective tables / indications.

[0199] Based on these tables, the UE can appropriately determine the tables of the precoding matrix to be referenced based on the precoding information fields.

[0200] Figure 14A This diagram illustrates an example of a new 3-layer pre-encoder based on the reuse of an existing 4-port partial phase interference encoder. Figure 14A In, for example, reuse Figure 3 The existing precoder with 3 layers is shown.

[0201] Figure 14B This is a diagram illustrating an example of a 6-layer precoder based on 4 layers from one coherent group and 2 layers from other coherent groups. Figure 14B In, for example, reuse Figure 2 , Figure 4 The existing precoders with 2 layers and 4 layers are shown.

[0202] In the case of a UE with 4 coherent groups, 1, 2, 3, or 4 existing precoders W can also be reused. 2TX This is used to form a new 8-port precoder. For example, a UE with four coherent groups of two ports per group can also perform 8-port transmission based on the four notified TPMI indices, taking into account one TPMI indication per 2TX.

[0203] Figure 15AThis is a diagram illustrating an example of a four-layer precoder based on two layers from one coherent group and two layers from other coherent groups. Figure 15A In, for example, reuse Figure 5B The existing precoder with two layers is shown.

[0204] Figure 15B This is a diagram illustrating an example of an 8-layer precoder based on four 2-layer precoders from four coherent groups. Figure 15B In, for example, reuse Figure 5B The existing precoder with two layers is shown.

[0205] (Constraints of the precoding matrix)

[0206] Figure 16A It means Figure 1-4 The graph shows the number of existing 4-port precoders. For example, Figure 16A The existing 4-port FC precoder is shown to have 16 precodes for rank 1, 8 precodes for rank 2, 4 precodes for rank 3, and 2 precodes for rank 4.

[0207] Figure 16B It means Figures 5A-5B The graph shows the number of existing 2-port precoders. Figure 16B For example, an existing 2-port FC precoder is shown to have 4 precoders for rank 1 and 2 precoders for rank 2.

[0208] With all 4-port / 2-port precoders (as selection candidates) used to generate 8-port PC precoders, the number of 8-port PC precoders becomes enormous, raising concerns about increased overhead required for notification of the TPMI index corresponding to the utilized precoders.

[0209] Therefore, research is underway to suppress the number of available 8-port precoders and to properly implement UL transmissions using more than 4 antenna ports.

[0210] For example, with the composition of N g The constraints related to A, A1, A2, A3, A4, etc., of the precoder for 8TX UE in =2 and 4 can also be applied based on a rule. Such a rule could be at least one of the following:

[0211] • Only FC precoders or only PC precoders are allowed;

[0212] • Only rule-based precoders are permitted.

[0213] • For a given rank, only a portion of the existing precoder is allowed;

[0214] • Select the precoder that can be applied based on the allowed combination of ranks for multiple antenna groups;

[0215] • Select the precoder that can be applied based on the permitted antenna group groups;

[0216] • Select the precoder that can be applied based on the allowed A1-A4 groups.

[0217] When using a specific precoder (type 2 precoder), there can also be a constraint that A1 and A2 are the same precoder under certain conditions. This specific condition could be, for example, that the rank of A1 and the rank of A2 are the same.

[0218] Furthermore, in this disclosure, the constraints of the precoding matrix and the selection of precoders can be rewritten. Additionally, in this disclosure, to generate an 8-port PC precoder, a subset of precoders is selected from existing precoders. In this disclosure, this "selection" can mean pre-defined in a standard, set via higher-layer signaling, or reported (or determined) by UE capability information. This "selection" can be performed per rank / coherence type / TX number or across multiple ranks / coherence types / TX numbers. Alternatively, the set of precoders that can be specified via physical layer signaling (e.g., DCI) can be determined via higher-layer signaling. The same applies to other implementations.

[0219] (SRS settings and TPMI instructions for codebook-based PUSCH in 8TX)

[0220] When the UE supports up to 8 layers of UL (PUSCH) transmission and has 8TX (8 antenna ports), it can also receive the following DCI (e.g., DCI format 0_1 / 0_2): a DCI for codebook-based PUSCH transmission that includes at least one of the following fields: precoding information and number of layers field, and extended TPMI field. The UE can also use this DCI to control UL transmission using 8TX.

[0221] At least one of the following may also correspond to the multiple coherent groups possessed by the terminal: multiple precoding information and layer digital segments, and the TPMI field.

[0222] UEs with two coherent groups, each with 4 ports, can also use the two fields of the extended TPMI, which indicate the TPMI or the rank of the predefined PUSCH for each coherent group. The indicated TPMI and rank reuse the existing 4TX UL codebook and TPMI index table.

[0223] UEs with four coherent groups and two ports per group can also use the four fields of the extended TPMI, which indicate the TPMI for each coherent group, or the rank of the scheduled PUSCH. The indicated TPMI and rank reuse the existing 2TX UL codebook and TPMI index table.

[0224] In the case of a UE with two coherent groups, the following options can be considered when both "SRS Resource Indication" fields are valid.

[0225] Option 1

[0226] The two fields of "Extended TPMI" can reuse the existing "Precoding Information and Layer Number" fields for the four antenna ports ( Figure 6 That is, the UE can also use the same table as the table used for precoding information and layer digital segments to determine the indication of the TPMI field. Therefore, a field indicates both the layer and TPMI index of the corresponding coherent group / SRS resource in the SRS resource set.

[0227] Option 1a

[0228] The fields of “Extended TPMI” can also be reused from the existing “Precoding Information and Layer Number” table used for the four antenna ports. For example, the first field of “Extended TPMI” = 11 indicates “4 layers, TPMI = 0 (W4)” for the first coherent group. TX,4,0 The second field of "Extended TPMI" = 4 indicates "Level 2, TPMI = 0 (W)" for the second coherence group. 4TX,2,0 )". W 4TX,i,j This can refer to the TPMI index j being sent to the i-th layer using the TPMI table 4TX precoder.

[0229] Option 1b

[0230] One field in the "Extended TPMI" can indicate only "4-layer" entries. This significantly reduces the bit size of this field, making it equivalent to indicating a TPMI index from a 4-layer TPMI table. Furthermore, another field in the "Extended TPMI" can reuse the existing "Precoding Information and Layer Number" table used for the four antenna ports. Because from the entire W... 4TX,4,j Only one precoder is specified, thus reducing overhead.

[0231] Option 1c

[0232] One field of the "Extended TPMI" (the original field) can reuse the existing "Precoding Information and Layer Number" table for all four antenna ports. Another field can interpret the "Precoding Information and Layer Number" table based on the indication of the original field. For example, if one "Extended TPMI" field = 9 and TPMI = 5 in Layer 2, then the other field can indicate only the entries from Layer 1 and Layer 2. In W 4TX,i,j With W 4TX,m,n If there are certain constraints or relationships between them, let m ≤ i.

[0233] Additionally, the scaling factor of the newly combined 8TX precoder can be recalculated in each option.

[0234] Option 2

[0235] The two fields of “Extended TPMI” can reuse the existing TPMI index table used for the four antenna ports. Figures 1-4 Layer information can also be indicated separately through two fields of the layer indicator.

[0236] Option 2a

[0237] Similar to option 1a, there is no restriction or relationship between the two fields of "Extended TPMI" and "Layer Indication".

[0238] Option 2b

[0239] Similar to option 1b, field 1 of “Layer Indication” indicates only 4 layers, and field 1 of “Extended TPMI” indicates only 4 layers of precoder.

[0240] Option 2c

[0241] Similar to option 1c, one field of the "layer indicator" is smaller than the others.

[0242] Figure 17 This is a diagram illustrating an example of the correspondence between precoding information and layer number field values ​​and the layer number and TPMI. That is, Figure 17 This demonstrates the reuse of [the technology / method] in "Extended TPMI". Figure 6 Examples of tables.

[0243] When the second field of "Extended TPMI" is 4, it can also be indicated that the second SRS resource set / UE coherence group is at Layer 2 and is indicated. Figure 17 The pre-encoder A.

[0244] When the initial field of "Extended TPMI" is 11, it can also be indicated as Layer 4 for the initial SRS resource set / UE coherence group, and is indicated as follows. Figure 17 The pre-encoder B.

[0245] Then, after decoding the two fields mentioned above, the UE can also apply precoder C, which combines precoders A and B. In this case, the scaling factor needs to be recalculated.

[0246] (analyze)

[0247] As mentioned above, in a partially phase-interference encoder based on an 8-port transmitted codebook (8-transmit UL codebook), the following are being studied in the cases of Ng=2 and 4 respectively.

[0248] (When Ng=2)

[0249] Precoding designs can be based on existing UL 4TX codebooks (e.g., Rel.15). Full-phase interference encoders / partial-phase interference encoders can also be used.

[0250] (When Ng=4)

[0251] We are currently researching precoder downselection (limitation on the number of precoders).

[0252] <Option 1 (Alt1)>

[0253] The precoding design can be based on an existing UL 2TX codebook (e.g., Rel.15). Alternatively, a full-phase intervention encoder can be used.

[0254] <Option 2 (Alt2)>

[0255] The precoding design can be based on an existing UL 4TX codebook (e.g., Rel.15). A partially phase-intervention encoder can also be used.

[0256] Figures 18A-18B It represents N g A graph showing the relationship between rank and layer in =2. Figure 18A For example, it corresponds to rank 1 and 8. Figure 18B This corresponds to ranks 2 through 7. Alternatively, from the perspective of performance and DCI overhead, any of the cases in Figure 18 can be selected.

[0257] Furthermore, regarding the suppression of the number of precoders mentioned above, such as Figure 19 As shown, it is possible to organize the analysis content for each rank. Figure 19 This is a graph showing the relationship between rank and the number of precoders. According to... Figure 19 Within a certain rank, several layer splits (e.g., rows that are not supported) can be deleted. In this way, for the case of layer splits, further selection of precoders can be considered to reduce the number of precoders.

[0258] As mentioned above, in partially coherent UEs, there are different settings for the number of antenna groups regarding antenna layout (e.g., Ng=2 and 4). In this case, it is assumed that the partially phase interference encoder defined for Ng=2 is different from the partially phase interference encoder defined for Ng=4.

[0259] In this scenario, the configuration of the partial phase interference encoder for each Ng (number of antenna groups) is unclear. Furthermore, the applicable tables (correspondence between precoding matrix and TPMI, precoding information and layer number, and TPMI, etc.) have not been adequately studied.

[0260] Therefore, the inventors of this invention conceived of a method for representing these correspondences (e.g., those related to the layers used for transmitting the UL portion of 8 and TPMI).

[0261] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0262] (Various rewrites, etc.)

[0263] In this disclosure, "A / B" and "at least one of A and B" may be rewritten as each other. In addition, in this disclosure, "A / B / C" may also mean "at least one of A, B and C".

[0264] In this disclosure, terms such as notification, activation, deactivation, indication (or indication), selection, configuration, update, and determination can be overridden. Similarly, terms such as support, control, ability to control, operation, and ability to operate can also be overridden.

[0265] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-level parameters, fields, Information Elements (IE), settings, etc., can also be modified interchangeably. In this disclosure, Medium Access Control (MAC) Control Elements (CE), update commands, activation / deactivation commands, etc., can also be modified interchangeably.

[0266] In this disclosure, higher-level signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc.

[0267] In this disclosure, MAC signaling may also use, for example, a MAC Control Element (MACCE) or a MAC Protocol Data Unit (PDU). Broadcast information may also be, for example, a Master Information Block (MIB), a System Information Block (SIB), a Minimum System Information (Remaining Minimum System Information (RMSI)), or Other System Information (OSI).

[0268] In this disclosure, physical layer signaling may also be, for example, downlink control information (DCI), uplink control information (UCI), etc.

[0269] In this disclosure, indexes, identifiers (IDs), indicators, resource IDs, etc., can be interchanged. In this disclosure, sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0270] In this disclosure, the following terms are used: panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmitting entity, transmission / reception point (TRP), base station, spatial relation information (SRI), spatial relation, SRS resource indicator (SRI), control resource set (CORESET), physical downlink shared channel (PDSCH), codeword (CW), transport block (TB), reference signal (RS), antenna port (e.g., demodulation reference signal (DMRS)) port, antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, code division multiplexing (CDM) group, reference signal group, CORESET group, physical uplink control channel). Channel (PUCCH) groups, PUCCH resource groups, resources (e.g., reference signal resources, SRS resources), resource sets (e.g., reference signal resource sets), CORESET pools, downlink transmission configuration indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, quasi-co-location (QCL) and QCL concept can also be rewritten.

[0271] In this disclosure, TPMI and TPMI index can be interchanged. Port and antenna port can also be interchanged. 8TX (8 transmit) can also refer to 8 ports or 8 antenna ports. 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 also be interchanged. Coherence group and SRS resource set can also be interchanged.

[0272] This disclosure primarily describes 8TX, but the same principle applies to 5TX, 6TX, 7TX, TX of 8 or more, and TX of 4 or less. In the following embodiments, "8" can also be rewritten as "n" (where n is any integer). In this case, those skilled in the art can conceive of a maximum value of "n" for the number of layers / ports, etc., which is assumed to be "8", and rewrite it appropriately.

[0273] Additionally, in this disclosure, "having the ability to..." can be interchanged with "the ability to support / report...".

[0274] In this disclosure, rank, transmission rank, number of layers, and number of antenna ports can be interchanged. Furthermore, "using one codeword" and "number of layers less than four" can also be interchanged. Similarly, "using two codewords" and "number of layers greater than four" can also be interchanged.

[0275] In this disclosure, tables can also be rewritten with one or more tables.

[0276] Furthermore, in the following embodiments, DCI may also refer to the DCI of at least one of the scheduling PUSCH and PDSCH (e.g., DCI format 0_x, 1_x (where x is an integer)). Additionally, the following embodiments are based on codebook-based transmission (PUSCH), but are not limited thereto.

[0277] In this disclosure, "using 1 codeword" and "the number of layers is 4 or less" can also be rewritten as each other. "using 2 codewords" and "the number of layers is greater than 4" can also be rewritten as each other.

[0278] Furthermore, the following implementation methods are based on codebook-based PUSCH transmission, but are not limited thereto.

[0279] In this disclosure, the x (x is an integer) port precoder may also refer to the x-port PC / FC / NC precoder. The x-port precoder may also refer to the x-port i (i is an integer) layer PC / FC / NC precoder (or the rank ix port PC / FC / NC precoder).

[0280] In this disclosure, existing x-port precoders may also be, for example, x-port precoders specified in 3GPP Rel.15 NR (e.g., precoders contained in UL’s 4-port transmit codebook).

[0281] In this disclosure, field A / field B and the first field / second field can also be overridden with each other.

[0282] (Wireless communication method)

[0283] <First Implementation Method>

[0284] The first implementation relates to a precoder for an 8TX UE in Ng=2.

[0285] In the first / second embodiment, the 8-port PC precoder can be constructed using either a single existing 4-port precoder or two existing 4-port precoders. An 8-port PC precoder constructed using a single existing 4-port precoder can also be referred to as a Type 1 precoder. An 8-port PC precoder constructed using two existing 4-port precoders can also be referred to as a Type 2 precoder.

[0286] Type 1 precoder P can also be represented by Equation 1 below.

[0287] [Mathematical Expression 1]

[0288]

[0289] Here, A is the existing 4-port pre-encoder, O 4×rank（A） It is a zero matrix with 4 rows and rank(A) columns. In addition, rank(A) means the rank of matrix A (the same applies to rank(*) later).

[0290] The type 2 precoder P can also be represented by the following Equation 2.

[0291] [Mathematical Expression 2]

[0292]

[0293] Here, A1 and A2 are existing 4-port precoders (which can be the same precoder or different precoders).

[0294] Type 1 precoders can also be used for cases where 1 ≤ rank ≤ 4. That is, rank(A) can be 1, 2, 3, or 4 as described above. For a Type 1 precoder, if the occupied antenna group is set to {antenna group 1, antenna group 2}, it can also be {10} or {01}. Here, the value '1' can also mean occupied, and the value '0' can also mean unoccupied. In addition, the meanings represented by these values ​​can also be reversed.

[0295] Type 2 precoders can also be used for cases where 1 < rank. That is, rank(P) = rank(A1) + rank(A2) = 2, 3, 4, 5, 6, 7, or 8. For a Type 2 precoder, the occupied antenna group can also be {11}.

[0296] For a type 2 precoder, the combination of (rank of A1, rank of A2) can also be as follows:

[0297] • When rank(P) = 2, (1, 1);

[0298] • When rank(P) = 3, (1, 2) and (2, 1);

[0299] • When rank(P) = 4, (1, 3), (2, 2), (3, 1);

[0300] • When rank(P) = 5, (1, 4), (2, 3), (3, 2), (4, 1);

[0301] • When rank(P) = 6, (2, 4), (3, 3), (4, 2);

[0302] • When rank(P) = 7, (3, 4) and (4, 3);

[0303] • When rank(P) = 8, (4, 4).

[0304] Figures 20A-20B This is a diagram illustrating the relationship between the rank and the precoder involved in the first embodiment.

[0305] As described above, the full-phase interference encoder for the Rel.15 4-transmit UL codebook (4 TX UL codebook) corresponding to ranks 1 to 4 can be defined in a table. In this table, for example, a 5-bit field can be used to represent the index 0 to 29 (TPMI index) (see reference...). Figure 20A In this case, the entries corresponding to indexes 32-61 can also be reused from the existing table.

[0306] In addition, such as Figure 20A As shown, a code point (e.g., index value 30) can also be introduced corresponding to rank = 0 (i.e., no precoder). That is, 30 precoders can correspond to indices 0 to 29, and an additional index (30) is introduced to represent rank = 0.

[0307] Based on the entries with rank=0, layer partitioning can be supported for (x,0) and (0,x). Layer=0 can mean that the corresponding antenna group is not used for transmission, and only one antenna group is used.

[0308] In the codebook subset setting of the partial phase interference encoder in Ng=2, each coherent group requires 5 bits. For example, to represent the layer of the first coherent group and TPMI, the first 5 bits (1 st 5 bits (see below) Figure 21Furthermore, to represent the layers of the second coherent group and TPMI, a second 5-bit (2) can be used. nd 5 bits). These first / second 5-bit fields can represent the entries mentioned above (e.g., Figure 20A ).

[0309] For example, with the first field indicating index = 30 (layer = 0) and the second field indicating index = 28, the 8TX precoder can be represented by the following Equation 3.

[0310] [Mathematical Expression 3]

[0311]

[0312] Here, P 28 It can be a rank 4 4TX precoder as shown by index=28.

[0313] Furthermore, with the first field representing index=23 and the second field representing index=30 (layer=0), the 8TX precoder can be represented by the following Equation 4.

[0314] [Mathematical Expression 4]

[0315]

[0316] Here, P 23 It could be a rank 2 4TX precoder as shown by index=23.

[0317] In each rank, when a portion of the precoder is selected, it is possible to reduce the number of bits required to indicate rank 1 to 4 precoders for an antenna group. Figure 20B The table shows the number of precoders that were reduced. For example... Figure 20B As shown, for a coherent group, the index (0~15) can be represented by a 4-bit field.

[0318] Alternatively, it is possible to use only 5 bits of either the first or second 5 bits mentioned above (e.g., the first 5 bits (1...)). st The 5-bit field is indicated as rank = 0. That is, the UE may not expect both 5-bit fields (first / second 5-bit) to be indicated as rank = 0 simultaneously.

[0319] Figure 21 This diagram illustrates an example of the DCI fields (first / second fields) according to the first embodiment. In the example above, the case where the first / second field is 5 bits was described, but as... Figure 21As shown, the first / second field can also be represented by i bits (i can be any natural number). The first field can represent the first antenna group. The second field can represent the second antenna group. For both the first and second, i can be the same or different. Furthermore, the order of the first / second field can be interchanged.

[0320] The combinations supported by the two 5-bit fields (first / second 5-bit) mentioned above can also be limited based on the constraints described above.

[0321] In this disclosure, the selection of which precoder (e.g., a full-phase interference encoder of Rel.15) based on the aforementioned table can be specified in the specification or set / indicated via higher-layer signaling / physical layer signaling. Furthermore, the layers of the coherent group indicated in DCI format 0_1 / 0_2 and the number of bits for TPMI can be specified in the specification or set / indicated via higher-layer signaling / physical layer signaling.

[0322] In the case of a partially phase-interference encoder, it can also be set to represent the set of layers in Ng=2, 4 and TPMI fields.

[0323] A dynamic switching between partially coherent / fully coherent / incoherent coding can be envisioned, or it can be omitted. Furthermore, the required number of precoders (i.e., the size of the TPMI fields) varies depending on each precoder applied. Therefore, in the case of envisioning dynamic switching, a larger field size can be applied (determined) in terms of the number of TPMI fields.

[0324] Precoder switching can be associated with settings that restrict a subset of the codebook. For example, when reusing existing settings, the entire codebook is applied as the existing settings. This codebook can contain all types of precoders used for DCI indication.

[0325] When introducing a new setting that does not support nested codebooks as an existing setting, it is possible to specify a particular coherence type (e.g., FC only, PC only with Ng=2, etc.). In this case, the DCI size can be determined by the coherence type that is set.

[0326] With the existing codebook subset, a unified DCI indication is needed for different types of precoders. Therefore, with indications differing for each coherence type, the UE cannot know the precoder type before decoding. In this case, a unified RI / TPMI indication for only the 8TX precoder could also be used.

[0327] According to the first embodiment described above, the precoder for an 8TX UE with two antenna groups can be properly instructed.

[0328] <Second Implementation Method>

[0329] The second implementation involves targeting N. g New DCI fields (Fields A / B) for the precoder targeting 8TX UE in =2. Figure 22 as well as Figure 23 This is a diagram illustrating an example of the association between the rank involved in the second embodiment and fields A and B.

[0330] A new field A can also be introduced to indicate the location of N. g =2 supports the layer segmentation scenario (see, for example, Figure 18). Furthermore, a new field B can be introduced, which indicates a specific precoder based on the interpretation of field A. That is, the layer in field B and the indication of TPMI can be interpreted based on the layer segmentation scenario indicated by field A. The interpretation of field B can apply at least one of the following options.

[0331] (Option 1)

[0332] In the case of layer segmentation, if the number of 8TX precoders does not exceed a certain number (e.g., 32 or 16), field B (e.g., 5 bits if it is 32, and 4 bits if it is 16) can be used to indicate the new 8TX precoder for the layer segmentation case. This specific number can be reported by UE capabilities, specified in the specification, or set / indicated by higher-layer signaling / physical layer signaling.

[0333] Figure 22 An example is shown where field A consists of 5 bits to indicate 18 states. Figure 22 The diagram illustrates the interpretation of field B (4 bits) based on field A in a specific rank (e.g., the case of a rank 2 layer partition (1,1)). Within this interpretation of field B, the number of corresponding 8TX precoders can also be limited to a maximum of 16.

[0334] Figure 23 The example shown illustrates how field A consists of 4 bits to indicate the state of 18. Figure 23 The diagram illustrates the interpretation of field B (5 bits) based on field A in a specific rank (e.g., the case of a rank 2 layer partition (1,1)). Within this interpretation of field B, the number of 8TX precoders can also be limited to a maximum of 32.

[0335] In option 1, a new table with an index starting from 0 can also be defined in the specification, which is divided by each layer.

[0336] (Option 2)

[0337] Field B can also be based on the layer segmentation indicated by field A, indicating one or two fully coherent 4TX precoders of a certain rank. The UE can also generate a new 8TX precoder based on the indicated one or two 4TX precoders by applying the above formula.

[0338] For each rank from 1 to 4 of the 4TX codebook, the supported full-phase intervention encoders can be numbered from 0 to indicate the rank in field B. This allows for the introduction of a new TPMI table for selecting / supporting full-phase intervention encoders for each rank from the 4TX pre-encoder.

[0339] For the indicated layer partition (x, y), x can represent the rank of A1, and y can represent the rank of A2. For example, when x=0, field B can indicate the TPMI index for the rank y of A2. When y=0, field B can indicate the TPMI index for the rank x of A1. When x!=0 and y!=0, field B can also indicate the TPMI indexes for the rank x of A1 and the rank y of A2.

[0340] Figure 24 This is a diagram illustrating an example of the DCI fields (fields A / B) involved in the second embodiment. For example... Figure 24 As shown, field A can indicate the layer segmentation (x, y). The interpretation of field B can be based on the indication of field A (one or two TPMI indications corresponding to one or two non-zero layers).

[0341] Figure 25 This is a diagram illustrating an example of the interpretation of field B in the second embodiment. For example... Figure 25 As shown, the case can be divided by each rank / each layer / each field A, with the interpretation of field B indicating the specific precoder.

[0342] As described above, in the case of layer partitioning (0,X) (where X is not zero), field B can indicate the TPMI index of the rank X of the coherent group represented by the indication of the layer partitioning case (the indication of field A). The case of layer partitioning (0,X) can mean that the number of layers (rank) of one of them is zero.

[0343] For example, in Figure 25 In the table on the left, in the case of rank=1 and level partitioning (0,1), field B can also be obtained from... Figure 25 The table on the right indicates the index from 0 to 15 corresponding to rank=1. The 4TX precoder indicated by this index can be used for the second day line group.

[0344] Furthermore, as in the case of layer splitting (x, y) (where x and y are not zero), in the case of two different layers, field B can indicate the TPMI index corresponding to rank x and other TPMI indices corresponding to rank y. The UE can generate a new 8TX precoder based on the 4TX precoder indicated by the interpretation of this field B.

[0345] For example, in Figure 25 In the table on the left, in the case of rank=3 and layer partitioning (2,1), field B can indicate a portion of a predefined precoder (e.g., four precoders represented by 2 bits) as a precoder corresponding to rank 2 for the first antenna group. Furthermore, field B can indicate a portion of this precoder as a precoder corresponding to rank 1 for the second antenna group.

[0346] Furthermore, in the case of layer segmentation (x, y), when x = y, at least one of the following two interpretations can be applied.

[0347] <Option 2a>

[0348] Field B can indicate a TPMI index of rank x. The UE can generate a new 8TX precoder corresponding to the two (both) antenna groups based on the 4TX precoder indicated by the TPMI index.

[0349] For example, in Figure 25 In the table on the left, in the case of rank=2 and level partitioning (1,1) (option 2a), field B can also be based on... Figure 25 The table on the right indicates the index from 0 to 15 corresponding to rank = 1. The 4TX precoder indicated by this index can be applied to both the first antenna group and the second antenna group.

[0350] <Option 2b>

[0351] Field B can indicate two TPMI indices for rank x. The UE can generate a new 8TX precoder corresponding to each antenna group based on the 4TX precoder indicated by each TPMI index.

[0352] For example, in Figure 25 In the table on the left, in the case of rank=2 and layer partitioning (1,1) (option 2b), field B can indicate a portion of a predefined precoder (e.g., four precoders represented by 2 bits) as a precoder corresponding to rank 1 for the first antenna group. Furthermore, field B can indicate a portion of this precoder as a precoder corresponding to rank 1 for the second antenna group.

[0353] [Variation Example]

[0354] As a special case, for the rank of the 4TX codebook (e.g., rank 4), where only one precoder is predefined for generating the new 8TX precoder, and the layer segmentation involves 4+x layers, field B may also not indicate the TPMI index for the antenna group with 4 layers (see reference). Figure 26 ).

[0355] Figure 26 This is a diagram illustrating the number of precoders per rank and the association of indices involved in the variations of the second embodiment. Figure 26 In this context, when all precoders are used, the index corresponding to a 4TX precoder can be indicated by a specific number of bits per rank. Furthermore, if only a portion of the precoder is used to generate a new 8TX precoder, a field with fewer bits can be used per rank.

[0356] According to the second embodiment described above, the precoder for an 8TX UE with two antenna groups can be properly instructed.

[0357] <Third Implementation Method>

[0358] The third implementation involves N. g =4 is a precoder for 8TX UEs. In the third embodiment, N in the first embodiment can be... g =2 can be rewritten as N g This can be applied when the value is 4. Furthermore, in the third embodiment, the 4-port / 4TX configuration in the first embodiment can be rewritten as 2-port / 2TX.

[0359] In the third / fourth embodiment, the 8-port PC precoder can also be constructed using one to four existing 2-port precoders. An 8-port PC precoder constructed using i existing (i=1 to 4) 4-port precoders can also be referred to as a type i precoder.

[0360] Type 1 precoder P can also be represented by the following Equation 5.

[0361] [Mathematical Expression 5]

[0362]

[0363] Here, A is the existing 2-port pre-encoder, O k×rank（A） It is a zero matrix with k rows and rank(A) columns (e.g., k=2, 4, 6). Additionally, the type i precoder in the second embodiment is always an 8-row, rank(A) column (or an 8-row, Σ) matrix. i rank(A) iThe matrix is ​​a matrix with 8 columns, therefore the bottom right corner "8×rank(A)" (or 8 rows Σ) is omitted. i rank(A) i Furthermore, as in Equation 5, a comma-separated and enumerated P can also mean that P is represented by at least one of the stated expressions (the same applies to subsequent mathematical expressions).

[0364] Type 2 precoder P can also be represented by the following Equation 6.

[0365] [Mathematical Expression 6]

[0366]

[0367] Here, A1 and A2 are existing 4-port precoders (which can be the same precoder or different precoders).

[0368] Type 3 precoder P can also be represented by the following Equation 7.

[0369] [Mathematical Expression 7]

[0370]

[0371] Here, A1, A2, and A3 are existing 4-port precoders (which can be the same precoder or different precoders).

[0372] Type 4 precoder P can also be represented by the following Equation 8.

[0373] [Mathematical Expression 8]

[0374]

[0375] Here, A1, A2, A3, and A4 are existing 4-port precoders (which can be the same precoder or different precoders).

[0376] Type 1 precoders can also be used for cases where 1 ≤ rank ≤ 2. That is, rank(A) can also be 1 or 2 as described above. For a Type 1 precoder, if the occupied antenna groups are set as {antenna group 1, antenna group 2, antenna group 3, antenna group 4}, they can also be {1000}, {0100}, {0010}, or {0001} (corresponding to P from left to right in Equation 5, respectively). Here, the value '1' can also mean occupied, and the value '0' can also mean unoccupied. In addition, the contents represented by these values ​​can also be reversed.

[0377] Type 2 precoders can also be used for cases where 2 ≤ rank ≤ 4. That is, rank(P) = rank(A1) + rank(A2) = 2, 3, or 4. For a Type 2 precoder, the occupied antenna groups can also be {1100}, {1010}, {1001}, {0110}, {0101}, or {0011} (corresponding to P from left to right in Equation 6, respectively).

[0378] For a type 2 precoder, the combination of (rank of A1, rank of A2) can also be as follows:

[0379] • When rank(P) = 2, (1, 1);

[0380] • When rank(P) = 3, (2, 1) and (1, 2);

[0381] • When rank(P) = 4, (2, 2).

[0382] Type 3 precoders can also be used for cases where 3 ≤ rank ≤ 6. That is, rank(P) = rank(A1) + rank(A2) = 3, 4, 5, or 6. For a type 3 precoder, the occupied antenna groups can also be {1110}, {1101}, {1011}, or {0111} (corresponding to P from left to right in Equation 7, respectively).

[0383] For a type 3 precoder, the combination of (rank of A1, rank of A2, rank of A3) can also be as follows:

[0384] • When rank(P) = 3, (1, 1, 1);

[0385] • When rank(P)=4, (2,1,1), (1,2,1), (1,1,2);

[0386] • When rank(P) = 5, (2, 2, 1), (2, 1, 2), (1, 2, 2);

[0387] • When rank(P) = 6, (2, 2, 2).

[0388] Type 4 precoders can also be used for cases where 4 ≤ rank ≤ 8. That is, rank(P) = rank(A1) + rank(A2) = 4, 5, 6, 7, or 8. For Type 3 precoders, the occupied antenna group can also be {1111} (corresponding to P in Equation 8).

[0389] For a type 4 precoder, the combination of (rank of A1, rank of A2, rank of A3, rank of A4) can also be as follows:

[0390] • When rank(P) = 4, (1, 1, 1, 1).

[0391] • When rank(P)=5, (2,1,1,1), (1,2,1,1), (1,1,2,1), (1,1,1,2).

[0392] • When 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).

[0393] • When rank(P)=7, (2,2,2,1), (2,2,1,2), (2,1,2,2), (1,2,2,2).

[0394] • When rank(P) = 8, (2, 2, 2, 2).

[0395] Figures 27A-27B This is a graph showing the relationship between the rank and the number of precoders involved in the third implementation. Figure 28 This is a diagram illustrating an example of the correspondence between the field values ​​of precoding information and layer number involved in the third embodiment and the layer number and TPMI.

[0396] As described above, the full-phase interference encoders for the Rel.15 2-transmit UL codebooks (2 TX UL codebooks) corresponding to ranks 1-4 can be defined in a table. In this table, for example, a 3-bit field can be used to represent the index 0-5 (TPMI index) (see reference). Figure 27A In this case, the entries corresponding to indexes 3 through 8 can also be reused from existing tables (e.g., references). Figure 28 ).

[0397] In addition, such as Figure 27A As shown, a code point (e.g., the index value can be 6) can also be introduced for rank = 0 (i.e., no precoder). That is, 6 precoders can correspond to indices 0 to 5, and an additional index (6) is introduced to represent rank = 0.

[0398] in addition, Figure 27A The table shown can be compared with... Figure 28 Reusing entries corresponding to indices 3-8 in the table and further appending entries corresponding to rank=0 is the same. In this case, indices 3-8 can be moved to 0-5. Here, Figure 28The entries corresponding to indices 3-8 can be associated with the layers of the 2TX full-phase interference encoder and TPMI. Furthermore, 3 bits can be used to represent indices 0-6.

[0399] In the codebook subset setting of the partial phase interference encoder in Ng=4, 3 bits are required for each coherent group. For example, to represent the layer of the first coherent group and TPMI, the first 3 bits (1 st 3 bits (see below) Figure 29 Furthermore, for the second coherent group layer and TPMI, a second 3-bit (2) can be used. nd 3 bits). To represent the layers of the third coherent group and TPMI, a third 3-bit (3) can be used. rd 3 bits). To represent the layers of the fourth coherent group and TPMI, a fourth 3-bit (4 bits) can be used. th 3 bits). These first to fourth 3-bit fields can represent the above entries (e.g. Figure 27A ).

[0400] In each rank, when a portion of the precoder is selected, it is possible to reduce the number of bits required to indicate rank 1 to 4 precoders for an antenna group. Figure 27B The table shows the number of precoders that were reduced. For example... Figure 20B As shown, for a coherent group, the index (0~3) can be represented by a 2-bit field.

[0401] Furthermore, to represent rank = 0, a maximum of 3 bits is sufficient.

[0402] Figure 29 This diagram illustrates an example of the DCI fields (first to fourth fields) according to the third embodiment. In the example above, the case where the first to fourth fields are 3 bits was described, but... Figure 29 As shown, the first to fourth fields can also be represented by i bits (i can be any natural number). The first to fourth fields can represent the first to fourth antenna groups, respectively. In the first to fourth fields, i can be the same or different. Furthermore, the order of the first to fourth fields can also be interchanged.

[0403] The combinations supported by the four 3-bit fields (first to fourth 3 bits) mentioned above can also be limited based on the constraints described above.

[0404] According to the third embodiment described above, the precoder for an 8TX UE with four antenna groups can be properly instructed.

[0405] <Fourth Implementation Method>

[0406] The fourth implementation relates to N g =4, a new DCI field (field A / B) for the precoder targeting 8TX UE. In the fourth embodiment, N in the second embodiment can be... g =2 can be rewritten as N g This can be applied when the value is 4. Furthermore, in the fourth embodiment, the 4-port / 4TX configuration in the second embodiment can be rewritten as 2-port / 2TX.

[0407] Figure 30 It represents N g =4 is a graph showing the relationship between rank and layer. For example, it corresponds to ranks 1 to 8. Alternatively, one can choose based on performance and DCI overhead. Figure 30 Any of the following situations.

[0408] You can also introduce a new field A (see below). Figure 31 as well as Figure 32 ), indicating that in N g =4 supports layer segmentation scenarios (e.g., see reference) Figure 30 ).according to Figure 30 It can indicate a total of 80 scenarios based on a combination of scenarios analyzed at a certain layer. Additionally, a new field B can be introduced (see below). Figure 31 as well as Figure 32 The specific precoder is indicated based on the interpretation of field A. That is, the layer in field B and the indication of TPMI can be interpreted based on the layer segmentation indicated by field A.

[0409] in addition, Figure 30 A portion (combination) of the layer segmentation scenario shown can also be removed to reduce the number of bits in field A.

[0410] The interpretation of field B can apply at least one of the following options.

[0411] (Option 1)

[0412] In the case of layer segmentation, if the number of 8TX precoders does not exceed a certain number (e.g., 16 or 8), field B (e.g., 4 bits if it is 16, and 3 bits if it is 8) can be used to indicate the new 8TX precoder for the layer segmentation case. This specific number can be reported by UE capabilities, specified in the specification, or set / indicated by higher-layer signaling / physical layer signaling.

[0413] In option 1, a new table with an index starting from 0 can also be defined in the specification, which is divided by each layer.

[0414] (Option 2)

[0415] Field B can also be based on the layer segmentation indicated by field A, indicating one to four fully coherent 2TX precoders corresponding to a certain rank. The UE can generate a new 8TX precoder based on the indicated one to four 2TX precoders by applying the above formula (e.g., Equation 8).

[0416] Figure 31 This is a diagram illustrating an example of the DCI fields (fields A / B) involved in the fourth embodiment. For example... Figure 31 As shown, field A can represent the layer segmentation cases (a, b, c, d). The interpretation of field B can be based on the indications of field A (one to four TPMI indications corresponding to one to four non-zero layers).

[0417] Figure 32 This is a diagram illustrating an example of the interpretation of field B in the fourth embodiment. For example... Figure 32 As shown, the case of segmentation by each rank / each layer / each field A can be represented by the interpretation of field B to indicate a specific precoder.

[0418] like Figure 32 As shown, for example, in the table on the left, at rank=1, field B can also represent an index of 0~3 corresponding to rank=1, according to the table on the right. The 2TX precoder indicated by this index can also be applied to the indicated antenna group.

[0419] Furthermore, in the case of layer segmentation (a,b,c,d), if at least two of a~d have the same value, at least one of the following two options can be applied.

[0420] <Option a>

[0421] Field B can represent a TPMI index of rank a~d. The UE can generate a new 8TX precoder corresponding to the two (both) antenna groups based on the 2TX precoder indicated by the TPMI index.

[0422] For example, in Figure 32 In the table on the left, in the case of rank=2 and level partitioning (1,1,0,0) (option a), field B can also be based on... Figure 32 The table on the right shows the indices 0 to 3 corresponding to rank = 1. The 2TX precoder indicated by the index can be applied to both indicated antenna groups.

[0423] <Option b>

[0424] Field B can represent two TPMI indices of rank a to d. The UE can generate a new 8TX precoder corresponding to each antenna group based on the 2TX precoder indicated by each TPMI index.

[0425] For example, in Figure 32 In the table on the left, in the case of rank=2 and layer partitioning (1,1,0,0) (option b), field B can be determined according to... Figure 32 The table on the right shows the indices 0-3 corresponding to rank=1 as the precoder for the first antenna group, corresponding to rank 1. Furthermore, field B can be based on... Figure 32 The table on the right shows the indices 0 to 3 corresponding to rank=1 as the pre-encoder for the second line group corresponding to rank 1.

[0426] In addition, such as Figure 32 As shown above rank 4, in the case of layer partitioning representing m coherent groups (i.e., m is non-zero), at least one of the following two interpretations can be applied.

[0427] <Option a>

[0428] Field B can represent the m TPMI indices of the corresponding rank. Each TPMI index can be applied to the corresponding antenna group.

[0429] <Option b>

[0430] For two to four antenna groups, when there is the same layer partitioning, field B can also indicate a TPMI index for the same layer. This TPMI index can be applied to the corresponding antenna group. For different layers, field B can also indicate separate TPMI indices for the corresponding antenna groups.

[0431] [Variation Example]

[0432] As a special case, for the rank of the 2TX codebook (e.g., rank 2), where only one precoder is predefined for generating the new 8TX precoder, and the layer segmentation includes 2 layers in (a, b, c, d), field B may not represent the TPMI index of the antenna group with 2 layers (see reference). Figure 33 ).

[0433] Figure 33 This is a diagram illustrating the number of precoders per rank and the association of indices involved in the variations of the fourth embodiment. Figure 33 In order to generate a new 8TX precoder, if only a portion of the precoder is used, the field with fewer bits can be used per rank.

[0434] According to the fourth embodiment described above, the precoder for an 8TX UE with four antenna groups can be properly instructed.

[0435] <Supplement>

[0436] [Information notification to UE]

[0437] In the above embodiments, any information (notification from the Network (NW) (e.g., Base Station (BS)) to the UE) (in other words, the reception of any information from the BS in the UE) can also be delivered using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signals) or combinations thereof.

[0438] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not specified in the existing standard.

[0439] When the above notification is made through a DCI, the notification can also be made through specific fields of the DCI, the Radio Network Temporary Identifier (RNTI) used in the scrambling of the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0440] Furthermore, any information notification to the UE in the above embodiments can be performed periodically, semi-persistently, or non-periodically.

[0441] [Notification from UE]

[0442] The notification of any information from the UE (to the NW) in the above embodiments (in other words, the transmission / reporting of any information in the UE to the BS) can also be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MACCE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals) or combinations thereof.

[0443] In the case where the above notification is made via MAC CE, the MAC CE can also be identified by including a new LCID, which is not specified in the existing standard, in the MAC subheader.

[0444] In cases where the above notification is sent via UCI, the above notification may also be sent using PUCCH or PUSCH.

[0445] Furthermore, the notification of any information from the UE in the above embodiments can also be carried out periodically, semi-persistently, or non-periodically.

[0446] [Regarding the application of each implementation method]

[0447] At least one of the above-described implementation methods can also be applied to situations where specific conditions are met. These specific conditions can be specified in the standard or notified to the UE / BS using higher-layer signaling / physical layer signaling.

[0448] At least one of the above-described implementation methods may also be applied only to UEs that have reported a specific UE capability or support that specific UE capability.

[0449] This specific UE capability can also represent at least one of the following:

[0450] • Supports specific processing / operation / control / information for at least one of the above embodiments;

[0451] • Supports 8TX UL transmission;

[0452] • Supports multiple different antenna layouts / number of antenna groups;

[0453] • Supported precoder types (e.g., type 1 / 2, type A / B / C / D).

[0454] • Supported existing x-port PC / FC / NC precoders that can be used to construct an 8-port PC precoder;

[0455] • Limitations on support for pre-encoders.

[0456] Furthermore, the aforementioned specific UE capabilities can be capabilities that apply across the entire frequency spectrum (frequency-independent and common), capabilities that apply to each frequency (e.g., one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), capabilities that apply to each frequency range (e.g., Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities that apply to each subcarrier spacing (SCS) or capabilities that apply to each feature set (FS) or each feature set per component carrier (FSPC).

[0457] Furthermore, the aforementioned specific UE capabilities can be either the ability to apply across full-duplex modes (which are common to all duplex modes) or the ability to apply to each duplex mode (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).

[0458] Furthermore, at least one of the above embodiments can also be applied to situations where the UE is set / activated / triggered by higher-layer signaling / physical layer signaling to specific information associated with the above embodiments (or to perform the operations of the above embodiments). For example, the specific information may also be information indicating support for activating 8TX UL transmission, support for multiple different antenna layouts / antenna group numbers, arbitrary RRC parameters for a specific version (e.g., Rel.18 / 19), etc.

[0459] Even if at least one of the above-mentioned specific UE capabilities is not supported or the above-mentioned specific information is not set, the UE may, for example, apply the operation of Rel.15 / 16.

[0460] (Postscript)

[0461] Regarding one embodiment (first / second embodiment) of this disclosure, the invention is described below.

[0462] [Postscript 1]

[0463] A terminal having:

[0464] The receiving unit receives downlink control information, which includes information related to codebook subsets indicating the precoders of the four ports at each layer; and

[0465] The control unit, based on the pre-encoder of the 4 ports indicated by the information, determines the partial phase interference encoder of the 8 ports used for uplink transmission.

[0466] The downlink control information includes a field corresponding to rank 0.

[0467] [Postscript 2]

[0468] The terminal as described in Appendix 1, wherein,

[0469] The downlink control information includes fields indicating the indication for each antenna group.

[0470] [Postscript 3]

[0471] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0472] The downlink control information includes: field A, indicating the case of layer segmentation; and field B, indicating the precoder of the specific 4 ports based on the interpretation of field A.

[0473] [Postscript 4]

[0474] The terminal as described in any of Appendix 1 to Appendix 3, wherein...

[0475] The number of precoders for the four ports is limited according to the number of each antenna group.

[0476] (Postscript)

[0477] Regarding one embodiment (third / fourth embodiment) of this disclosure, the following invention is noted.

[0478] [Postscript 1]

[0479] A terminal having:

[0480] The receiving unit receives downlink control information, which includes information related to codebook subsets indicating the precoder of each layer's 2-port precoder; and

[0481] The control unit, based on the pre-encoder of the 2-port indicated by the information, determines the partial phase interference encoder of the 8-port used for uplink transmission.

[0482] The downlink control information includes a field corresponding to rank 0.

[0483] [Postscript 2]

[0484] The terminal as described in Appendix 1, wherein,

[0485] The downlink control information includes fields indicating the indication for each antenna group.

[0486] [Postscript 3]

[0487] The terminal as described in Appendix 1 or Appendix 2, wherein,

[0488] The downlink control information includes: field A, indicating the case of layer segmentation; and field B, indicating the precoder of a specific port based on the interpretation of field A.

[0489] [Postscript 4]

[0490] The terminal as described in any of Appendix 1 to Appendix 3, wherein...

[0491] The number of precoders for each of the antenna groups is limited.

[0492] (Wireless communication system)

[0493] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0494] Figure 34 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply referred to as System 1) may also be a system that implements communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5GNR) as standardized by the Third Generation Partnership Project (3GPP).

[0495] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can 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)), etc.

[0496] 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.

[0497] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity between NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0498] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0499] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0500] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). In addition, the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0501] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0502] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc. based on Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0503] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0504] The core network 30 may also include, for example, user plane functions (UPF), access and mobility management functions (AMF), session management functions (SMF), unified data management (UDM), application functions (AF), data network (DN), location management functions (LMF), and network functions (NF) such as operation, administration, and maintenance (OAM). Alternatively, multiple functions can be provided through a single network node. Furthermore, communication with external networks (e.g., the Internet) can also be achieved via the DN.

[0505] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0506] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0507] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0508] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared among the user terminals 20.

[0509] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0510] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. In addition, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0511] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0512] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be rewritten as DL data, and PUSCH can be rewritten as UL data.

[0513] In PDCCH detection, a Control Resource Set (CORESET) and a search space can also be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0514] A search space can also correspond to a PDCCH candidate corresponding to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" in this disclosure can be rewritten interchangeably.

[0515] The PUCCH can also transmit uplink control information (uplink control information (UCI)) that includes at least one of the following: Channel State Information (CSI), delivery confirmation information (such as Hybrid Automatic Repeat Request ACK / Acknowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR). The PRACH can also transmit random access preambles used for establishing connections with the cell.

[0516] In addition, in this disclosure, downlink, uplink, etc., can also be described without the word "link". Furthermore, they can also be described without the word "physical" at the beginning of various channels.

[0517] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. As DL-RS, wireless communication system 1 can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), phase tracking reference signals (PTRS), etc.

[0518] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. can also be called reference signals.

[0519] Furthermore, in wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0520] (Base station)

[0521] Figure 35This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0522] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0523] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0524] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0525] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0526] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0527] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0528] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0529] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of the transmitting beam and the receiving beam.

[0530] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0531] The transmitting and receiving unit 120 (transmitting processing unit 1211) can 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 string to be transmitted, and output the baseband signal.

[0532] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering (filtering), amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0533] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter (filter) and demodulate the baseband signal received by the transmitting and receiving antenna 130 in the wireless frequency band.

[0534] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and acquire user data, etc.

[0535] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can 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)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0536] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the core network 30 and the devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and acquire and transmit user data (user plane data), control plane data, etc. for user terminal 20.

[0537] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0538] Additionally, the transmit / receive unit 120 can also transmit downlink control information, which includes information related to a subset of the codebook indicating the 4-port / 2-port pre-encoder of each layer. The transmit / receive unit 120 can also receive uplink transmissions using an 8-port partial phase-intervention encoder, which is determined based on the 4-port / 2-port pre-encoder indicated by the information.

[0539] The control unit 110 can also control the reception of the physical uplink shared channel.

[0540] (User terminal)

[0541] Figure 36 This diagram illustrates an example of the structure 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. Alternatively, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0542] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0543] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0544] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0545] The transmitting / receiving 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 transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0546] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0547] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0548] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0549] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. to form at least one of the transmitting beam and the receiving beam.

[0550] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate a bit string to be transmitted.

[0551] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering processing), DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0552] Furthermore, whether or not to apply DFT processing can be based on the transform precoding settings. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform; otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel without performing DFT processing.

[0553] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering (filtering), amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0554] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter (filter) and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0555] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, 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, and acquire user data.

[0556] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0557] Additionally, the measurement unit 223 can also derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources can be, for example, non-zero power (NZP) CSI-RS resources. Furthermore, the measurement unit 223 can also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources can be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. Additionally, CSI-IM can also be referred to as CSI-Interference Management (IM), and can be interchanged with zero power (ZP) CSI-RS. Furthermore, in this disclosure, CSI-RS, NZPCSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., can also be interchanged.

[0558] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0559] Additionally, the transmitting / receiving unit 220 can also receive downlink control information, which includes information related to a codebook subset indicating the 4-port / 2-port precoder of each layer. The downlink control information may also include a field corresponding to rank 0. The downlink control information may also include a field indicating an indication of each antenna group. The downlink control information may also include field A, indicating the layer segmentation case; and field B, indicating a specific 4-port precoder based on the interpretation of field A. The number of 4-port / 2-port precoders may also be limited per antenna group.

[0560] The control unit 210 can also determine the partial phase interference encoder of the 8-port used for uplink transmission based on the pre-encoder of the 4-port / 2-port indicated by the information.

[0561] (Hardware structure)

[0562] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0563] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. Each of these, as described above, is not particularly limited in its implementation method.

[0564] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 37This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0565] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit can be interchanged. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0566] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0567] Regarding the functions in base station 10 and user terminal 20, for example, by reading specific software (programs) into hardware such as processor 1001 and memory 1002, so that processor 1001 performs calculations and controls communication via communication device 1004, or by controlling at least one of reading and writing data in memory 1002 and storage device 1003.

[0568] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0569] 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 performs various processes accordingly. As a program, a program that causes the computer to perform 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 operated in the processor 1001; similar implementations can be made for other functional blocks.

[0570] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0571] Storage device 1003 may also be a computer-readable recording medium, such as a flexible disc, floppy disk, optical disk (e.g., a compact disc ROM), digital multifunction disk, Blu-ray disc, removable disk, hard disk drive, smart card, flash memory device (e.g., a card, stick, key drive), magnetic stripe, database, server, or at least one other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0572] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0573] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., a touch panel).

[0574] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0575] Furthermore, the base station 10 and the user terminal 20 can 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 can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0576] (Variation example)

[0577] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be interchanged. Additionally, a signal may also be a message. A reference signal can also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0578] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitute 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 (e.g., 1 ms) independent of the parameter set (numerology).

[0579] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), 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.

[0580] In the time domain, a time 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.). In addition, a time slot can also be a time unit based on a set of parameters.

[0581] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0582] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be interchanged.

[0583] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0584] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0585] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0586] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0587] A TTI with a duration of 1ms can also be referred to as a normal TTI (TTI in 3GPPRel.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 can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0588] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be rewritten as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be rewritten as a TTI with a duration of less than a long TTI but more than 1 ms.

[0589] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0590] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0591] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0592] In addition, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0593] The Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0594] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can also be set within a single carrier.

[0595] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Additionally, terms such as "cell" and "carrier" in this disclosure may be replaced with "BWP".

[0596] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0597] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0598] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0599] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0600] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0601] 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.

[0602] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), 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 combinations thereof.

[0603] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, for example, RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, MAC control elements (CE).

[0604] Furthermore, notification of specific information (e.g., a notification of “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0605] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0606] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0607] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0608] The terms “system” and “network” as used in this disclosure are interchangeable. “Network” may also mean devices included in a network (e.g., base stations).

[0609] In this disclosure, the terms “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”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, “panel”, “UE panel”, “transmitting entity”, and “receiving entity” are used interchangeably.

[0610] Furthermore, in this disclosure, the antenna port can also be rewritten with an antenna port used for any signal / channel (e.g., a DeModulation Reference Signal (DMRS) port). In this disclosure, the resources can also be rewritten with resources used for any signal / channel (e.g., reference signal resources, SRS resources, etc.). Additionally, the resources may also include time / frequency / code / space / power resources. Moreover, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0611] The aforementioned groups may include, for example, at least one of the following: spatial relation group, code division multiplexing (CDM) group, reference signal (RS) group, control resource set (CORESET) group, PUCCH group, antenna port group (e.g., DMRS port group), layer group, resource group, beam group, antenna group, panel group, etc.

[0612] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., can also be rewritten to each other.

[0613] Furthermore, in this disclosure, the TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, and joint TCI state can also be rewritten to each other.

[0614] Furthermore, in this disclosure, terms such as "QCL", "QCL concept", "QCL relationship", "QCL type information", "QCL property (QCLproperty / properties)", "specific QCL type (e.g., type A, type D) property", and "specific QCL type (e.g., type A, type D)" can be rewritten interchangeably.

[0615] In this disclosure, indexes, identifiers (IDs), indicators, indications, resource IDs, etc., can be interchanged. Sequences, lists, sets, groups, clusters, subsets, etc., can also be interchanged.

[0616] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can be interchanged. "Spatial relationship information (TCI state)" can also be interchanged with "a set of spatial relationship information (TCI states)," "one or more spatial relationship information," etc. TCI state and TCI can also be interchanged. Spatial relationship information and spatial relationships can also be interchanged.

[0617] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0618] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its overall coverage area can be divided into several smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0619] In this disclosure, the situation where a base station sends information to a terminal can also be modified to the situation where the base station instructs the terminal to perform control / operation based on that information.

[0620] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0621] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0622] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a moving object, the moving object itself, etc.

[0623] The term "mobile body" refers to a movable object whose speed is arbitrary, including situations where the body is stationary. Examples of such mobile bodies include vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, hot air balloons, and objects carried on them, but are not limited to these. Furthermore, the mobile body can also be a mobile body that moves autonomously based on operational commands.

[0624] The mobile entity can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile entity moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Additionally, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0625] Figure 38 This is a diagram illustrating an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a speed sensor 51, a 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.

[0626] The drive unit 41 is comprised of 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 called a steering handle) that steers at least one of the front wheels 46 and the rear wheels 47 based on operation of the steering wheel by the user.

[0627] The electronic control unit 49 consists of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63). Signals from various sensors 50-58 present in the vehicle are input to the electronic control unit 49. The electronic control unit 49 can also be referred to as an electronic control unit (ECU).

[0628] The signals from various sensors 50-58 include the following: current signal from current sensor 50 sensing the current of the motor; rotational speed signal of front wheel 46 / rear wheel 47 obtained by speed sensor 51; air pressure signal of front wheel 46 / rear wheel 47 obtained by air pressure sensor 52; vehicle speed signal obtained by vehicle speed sensor 53; acceleration signal obtained by acceleration sensor 54; accelerator pedal 43 depress amount signal obtained by accelerator pedal sensor 55; brake pedal 44 depress amount signal obtained by brake pedal sensor 56; shift lever 45 operation signal obtained by shift lever sensor 57; and detection signal obtained by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0629] The information service unit 59 consists of various devices for providing (outputting) various information such as driving information, traffic information, and entertainment information, including navigation systems, audio systems, speakers, displays, televisions, and radios, as well as one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0630] The information service unit 59 may include input devices (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that accept input from the outside, and output devices (e.g., display, speaker, LED light, touch panel, etc.) that implement output to the outside.

[0631] The driver assistance system unit 64 comprises various devices used to provide functions for preventing accidents or reducing the driver's workload, such as millimeter-wave radar, light detection and ranging (LiDAR), cameras, positioning detectors (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 Unit (IMU), Inertial Navigation System (INS), etc.), artificial intelligence (AI) chips, and AI processors, and one or more ECUs that control these devices. Furthermore, the driver assistance system unit 64 sends and receives various information via communication module 60 to realize driver assistance functions or autonomous driving functions.

[0632] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) with the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49 of the vehicle 40, and various sensors 50-58 via the communication port 63.

[0633] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 60 can be located both inside and outside the electronic control unit 49. The external device can be, for example, the aforementioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 can be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or it can function as at least one of the base station 10 and user terminal 20).

[0634] The communication module 60 can also wirelessly transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58 described above, the information obtained based on these signals, and the information based on input from an external (user) source obtained via the information service unit 59 to an external device. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., can also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 can also contain information based on the aforementioned inputs.

[0635] The communication module 60 receives various information (traffic information, signal information, workshop information, etc.) sent 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 devices such as displays and speakers based on the PDSCH received by the communication module 60 (or the data / information decoded from the PDSCH).

[0636] Furthermore, the communication module 60 stores various types of information received from external devices into a memory 62 that can be utilized 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, gear shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, and various sensors 50-58, etc., of the vehicle 40.

[0637] Furthermore, the base station in this disclosure can also be rewritten as a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be rewritten as terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be rewritten as sidelink channel.

[0638] Similarly, the user terminal in this disclosure can also be rewritten as a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0639] In this disclosure, actions are assumed to be performed by the base station, and sometimes, depending on the circumstances, by its upper node. In a network containing one or more network nodes having a base station, the various operations performed for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0640] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, for the method described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0641] The various methods / implementations described in this disclosure can 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, where 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), Futuregeneration Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-Wideband (UWB)), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from, modified, generated, or specified based on these methods. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0642] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0643] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit 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 the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0644] The term "determining" as used in this disclosure can encompass a wide variety of operations. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (search, inquiry) (e.g., searching in a table, database or other data structure), and ascertaining.

[0645] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0646] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". That is, "judgment (decision)" can also refer to certain operations as situations where a "judgment (decision)" is made. In this disclosure, "judgment (decision)" can also be rewritten in relation to the operations described above.

[0647] Furthermore, in this disclosure, "determine / determining" can also be interchanged with "assume / assuming," "expect / expecting," "consider / considering," etc. Additionally, in this disclosure, "not assuming to proceed..." can also be interchanged with "assuming not to proceed..."

[0648] In this disclosure, "expect" can also be interchanged with "be expected." For example, "expect(s) ..." ("..." can also be expressed using a "that" clause, an indefinite "to", etc.) can be interchanged with "be expected ...." "Does not expect..." can also be interchanged with "be not expected...". Furthermore, "An apparatus A is not expected..." can also be interchanged with "Apparatus B other than apparatus A does not expect..." (for example, if apparatus A is a UE, apparatus B can also be a base station).

[0649] The term "maximum transmit power" as used 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 UE maximum transmit power).

[0650] As used in this disclosure, the terms “connected,” “coupled,” or all variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually “connected” or “coupled” elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, “connection” can also be rewritten as “access.”

[0651] In this disclosure, when two elements are connected, it is possible to consider using more than one wire, cable, printed electrical connection, etc. to be "connected" or "combined" with each other, and as several non-limiting and non-exclusive examples, to use electromagnetic energy with wavelengths having wireless frequency domain, microwave region, light (both visible and invisible) region to be "connected" or "combined" with each other.

[0652] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0653] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0654] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0655] In this disclosure, words such as "below," "less than," "above," "more," and "equal to" can be interchanged. Furthermore, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "early," "slow," "wide," and "narrow," etc., are not limited to the positive, comparative, and superlative degrees, and can be interchanged. Additionally, in this disclosure, words meaning "good," "bad," "large," "small," "high," "low," "early," "slow," "wide," and "narrow," etc., as expressions appended with "the i-th" (where i is any integer), are not limited to the positive, comparative, and superlative degrees, and can be interchanged (for example, "highest" can also be interchanged with "the i-th highest").

[0656] In this disclosure, "of", "for", "regarding", "related to", "associated with", etc., can also be rewritten interchangeably.

[0657] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "in response to A", "based on A", "during / while A", "before A", "at (the same time as) / on A", "after A", "since A", and "until A" can be rewritten interchangeably. Furthermore, A and B can be replaced with nouns, gerunds, or ordinary sentences depending on the context. Additionally, the time difference between A and B can be approximately 0 (immediately after or immediately before). Moreover, a time offset can be applied to the time A occurs. For example, "A" can be rewritten interchangeably with "before / after the time offset of A". This time offset (e.g., more than one symbol / slot) can be predetermined or determined by the UE based on the information it is notified of.

[0658] In this disclosure, timing, moment, time, time instance, arbitrary time unit (e.g., time slot, sub-time slot, symbol, subframe), period, opportunity, resource, etc., can also be overridden.

[0659] The inventions disclosed herein have been described in detail above. However, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The description herein is for illustrative purposes only and is not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal, comprising: The receiving unit receives downlink control information, which includes information related to codebook subsets indicating the precoder of each layer's 2-port precoder; and The control unit, based on the pre-encoder of the 2-port indicated by the information, determines the partial phase interference encoder of the 8-port used for uplink transmission. The downlink control information includes a field corresponding to rank 0.

2. The terminal as described in claim 1, wherein, The downlink control information includes fields indicating the indication for each antenna group.

3. The terminal as described in claim 1, wherein, The downlink control information includes: field A, indicating the case of layer segmentation; and field B, based on the interpretation of field A, indicating the precoder of the specific port 2.

4. The terminal as described in claim 1, wherein, The number of precoders for each of the antenna groups is limited.

5. A wireless communication method, which is a wireless communication method for a terminal, comprising: The step of receiving downlink control information, wherein the downlink control information includes information related to a codebook subset indicating the precoder of each layer's 2-port precoder; as well as Based on the pre-encoder of the 2-port indicated by the information, the step of determining the partial phase interference encoder of the 8-port used for uplink transmission is as follows: The downlink control information includes a field corresponding to rank 0.

6. A base station, comprising: The transmitting unit transmits downlink control information, which includes information related to a codebook subset indicating the precoder of each layer's 2-port precoder. as well as The receiving unit receives an uplink transmission using an 8-port partial phase interference encoder, the 8-port partial phase interference encoder being determined based on the 2-port pre-encoder indicated by the information. The downlink control information includes a field corresponding to rank 0.

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