Terminals, wireless communication methods, base stations and systems

Abstract

A terminal according to one aspect of the present disclosure comprises: a control unit that determines a precoder on the basis of a codebook for transmitting a certain number of layers using more than four antenna ports; and a transmission unit that performs uplink transmission on the basis of the precoder. According to an aspect of the present disclosure, a UL transmission using more than four antenna ports can be appropriately controlled.

Description

[[Technical Field]]

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

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was standardized for the purposes of higher-speed data rates, lower latency, and the like (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized for the purposes of further increasing capacity and advancing functionality of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Post-LTE systems (for example, also referred to as 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also under study. [[Prior Art Documents]] [[Non-Patent Documents]]

[0004] [[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]] [Problems that the invention aims to solve]

[0005] Rel.15 NR supports uplink (UL) Multi-Input Multi-Output (MIMO) transmission up to 4 layers. For future NRs, support for UL transmission with more than 4 layers is being considered to achieve higher spectral efficiency. For example, for Rel.18 NR, up to 6 ranks of transmission using 6 antenna ports, and up to 6 or 8 ranks of transmission using 8 antenna ports are being considered.

[0006] However, there has been little progress in determining how to determine the precoding matrix for UL transmission using more than four antenna ports. For example, there has been no progress in developing a codebook for 1-8 layer transmission using eight antenna ports. Failure to clarify this could limit the increase in communication throughput.

[0007] Therefore, this disclosure provides a terminal and wireless communication method that can appropriately control UL transmission using more than four antenna ports. 、 base station and system One of the objectives is to provide [this]. [Means for solving the problem]

[0008] A terminal relating to one aspect of this disclosure is 8 Use the antenna port Up to 8 layers of uplink (UL) For sending 8 Send UL A control unit that determines a precoder based on a codebook, and up to 8 layers based on the precoder. UL delivery A transmitting unit that performs the transmission, and If a first antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the first antenna layout; if a second antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the second antenna layout; and the transmitting unit transmits capability information indicating that it supports at least one of the fully coherent codebook for the first antenna layout and the fully coherent codebook for the second antenna layout. . [Effects of the Invention]

[0009] According to one aspect of this disclosure, UL transmission using more than four antenna ports can be appropriately controlled. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 shows an example of a precoding matrix table W for single-layer (rank 1) transmission using four antenna ports when the transform precoder is disabled in Rel.16 NR. [Figure 2] Figure 2 shows an example of a precoding matrix table W for 2-layer (rank 2) transmission using 4 antenna ports when the transform precoder is disabled in Rel.16 NR. [Figure 3] Figure 3 shows an example of a precoding matrix table W for 3-layer (rank 3) transmission using 4 antenna ports when the transform precoder is disabled in Rel.16 NR. [Figure 4] Figure 4 shows an example of a precoding matrix table W for 4-layer (rank 4) transmission using 4 antenna ports when the transform precoder is disabled in Rel.16 NR. [Figure 5] Figure 5 shows an example of the correspondence between the field values ​​for precoding information and the number of layers, and the number of layers and TPMI in Rel.16 NR. [Figure 6] Figures 6A and 6B show an example of an antenna layout for an 8-antenna port system. [Figure 7] Figure 7 shows an example of an 8-antenna port antenna layout to illustrate the coherent information of the first embodiment. [Figure 8] Figures 8A and 8B show an example of a supported 8-port 1-layer NC precoder according to the second embodiment. [Figure 9] Figure 9 shows an example of a supported 8-port 1-layer PC precoder according to the third embodiment. [Figure 10]Figures 10A-10C show an example of a supported 8-port 1-layer PC precoder (x=2) according to Embodiment 3.3. [Figure 11] Figures 11A and 11B show an example of a codebook for one-layer CSI reporting using PCSI-RS antenna ports in an existing Rel.15 / 16 NR. [Figure 12] Figures 12A and 12B show an example of a codebook for one-layer CSI reporting using PCSI-RS antenna ports in an existing Rel.15 / 16 NR. [Figure 13] Figure 13 shows an example of the association between a precoder according to the second to fourth embodiments and a TPMI index. [Figure 14] Figure 14 shows an example of an 8-transmission UL codebook according to a modified version of the fourth embodiment. [Figure 15] Figures 15A-15C show an example of a supported 8-port 2-layer NC precoder according to the fifth embodiment. [Figure 16] Figure 16 shows an example of a supported 8-port 2-layer NC precoder according to the fifth embodiment. [Figure 17] Figure 17 shows an example of an 8-port 2-layer PC precoder according to the sixth embodiment. [Figure 18] Figures 18A and 18B show an example of a codebook for two-layer CSI reporting using PCSI-RS antenna ports in an existing Rel.15 / 16 NR. [Figure 19] Figures 19A and 19B show an example of a codebook for two-layer CSI reporting using PCSI-RS antenna ports in an existing Rel.15 / 16 NR. [Figure 20] Figure 20 shows an example of a schematic configuration of a wireless communication system according to one embodiment. [Figure 21] Figure 21 shows an example of the configuration of a base station according to one embodiment. [Figure 22] Figure 22 shows an example of the configuration of a user terminal according to one embodiment. [Figure 23] Figure 23 shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. [Figure 24] Figure 24 shows an example of a vehicle according to one embodiment. [Modes for carrying out the invention]

[0011] (SRS, PUSCH transmission control) In Rel.15 NR, a terminal (user terminal, User Equipment (UE)) may receive information used to transmit a measurement reference signal (e.g., a Sounding Reference Signal (SRS)) (e.g., SRS configuration information, for example, parameters in the "SRS-Config" of the RRC control element).

[0012] Specifically, the UE may receive at least one of the following: information about one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of the RRC control element) and information about one or more SRS resources (SRS resource information, e.g., "SRS-Resource" of the RRC control element).

[0013] A single SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped together). Each SRS resource may be identified by an SRS Resource Indicator (SRI) or an SRS Resource Identifier.

[0014] SRS resource set information may 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 on the SRS usage.

[0015] Here, the SRS resource type may be one of the following: Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), or Aperiodic CSI (A-SRS). The UE may send P-SRS and SP-SRS periodically (or periodically after activation), and A-SRS based on DCI's SRS request.

[0016] Furthermore, the application (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management, codebook (CB), noncodebook (NCB), antenna switching, etc. SRS for codebook or noncodebook applications may be used to determine the precoder for SRI-based codebook-based or noncodebook-based uplink shared channel (PUSCH) transmission.

[0017] For example, in the case of codebook-based transmission, the UE may determine the precoder (precoding matrix) for PUSCH transmission based on the SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may determine the precoder for PUSCH transmission based on the SRI.

[0018] SRS resource information may include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmit comb, SRS resource mapping (e.g., time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS symbols, SRS bandwidth, etc.), hopping-related information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0019] The spatial relationship information of the SRS (for example, the "spatialRelationInfo" element of the RRC information element) may indicate spatial relationship information between a predetermined reference signal and the SRS. The predetermined reference signal may be at least one of a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Channel State Information Reference Signal (CSI-RS), and an SRS (for example, another SRS). The SS / PBCH block may be called a Synchronization Signal Block (SSB).

[0020] The spatial relationship information of the SRS may include at least one of the following as an index for the predetermined reference signal: the SSB index, the CSI-RS resource ID, and the SRS resource ID.

[0021] In this disclosure, the terms SSB index, SSB resource ID, and SSB Resource Indicator (SSBRI) may be interpreted interchangeably. Similarly, the terms CSI-RS index, CSI-RS resource ID, and CSI-RS Resource Indicator (CRI) may be interpreted interchangeably. Furthermore, the terms SRS index, SRS resource ID, and SRI may be interpreted interchangeably.

[0022] The spatial relationship information of the SRS may include a serving cell index, BWP index (BWP ID), etc., corresponding to the predetermined reference signal mentioned above.

[0023] If a UE configures spatial relationship information regarding an SSB or CSI-RS and an SRS resource, it may transmit the SRS resource using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS. In this case, the UE may assume that the UE receive beam for the SSB or CSI-RS and the UE transmit beam for the SRS are the same.

[0024] If a UE sets spatial relationship information regarding a target SRS resource and another SRS (reference SRS), it may transmit the target SRS resource using the same spatial domain filter (spatial domain transmit filter) as the one used for transmitting the reference SRS. In other words, in this case, the UE may assume that the UE transmit beam for the reference SRS and the UE transmit beam for the target SRS are the same.

[0025] The UE may determine the spatial relationships of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a predetermined field (e.g., the SRS resource identifier (SRI) field). Specifically, the UE may use spatial relationship information of the SRS resource (e.g., "spatialRelationInfo" of the RRC information element) determined based on the value of the predetermined field (e.g., SRI) for the PUSCH transmission.

[0026] In Rel.15 / 16 NR, when using codebook-based transmission for PUSCH, the UE may have up to two SRS resources, with the codebook's SRS resource set configured by the RRC, and one of those up to two SRS resources indicated by the DCI (1-bit SRI field). The PUSCH transmit beam will be specified by the SRI field.

[0027] The UE may determine the TPMI and layer number (transmit rank) for PUSCH based on the precoding information and layer number field (hereinafter also referred to as the precoding information field). The UE may select a precoder from the uplink codebook for the same number of ports as the number of SRS ports indicated by the higher layer parameter "nrofSRS-Ports" set for the SRS resource specified by the SRI field, based on the TPMI, layer number, etc.

[0028] In Rel.15 / 16 NR, when using non-codebook-based transmission for PUSCH, the UE may have up to four SRS resources, with the non-codebook SRS resource set configured by the RRC, and one or more of these up to four SRS resources may be indicated by the DCI (2-bit SRI field).

[0029] The UE may determine the number of layers (transmission rank) for PUSCH based on the above SRI field. For example, the UE may determine that the number of SRS resources specified by the above SRI field is the same as the number of layers for PUSCH. The UE may also calculate the precoder for the above SRS resources.

[0030] If a CSI-RS (which may also be called an associated CSI-RS) associated with the SRS resource (or the SRS resource set to which the SRS resource belongs) is configured at a higher layer, the PUSCH transmit beam may be calculated based on the configured associated CSI-RS (measurements). Otherwise, the PUSCH transmit beam may be specified by the SRI.

[0031] Furthermore, the UE may be configured to use either codebook-based or non-codebook-based push transmission via a higher-layer parameter "txConfig" that indicates the transmission scheme. This parameter may represent the values ​​"codebook" or "noncodebook".

[0032] In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may mean PUSCH when “codebook” is set as the transmission scheme for the UE. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may mean PUSCH when “non-codebook” is set as the transmission scheme for the UE.

[0033] (Determination of the PUSCH precoder in codebook (CB) based transmission) As mentioned above, in the case of codebook (CB) based transmission, the UE may determine the precoder for PUSCH transmission based on SRI, TRI, TPMI, etc.

[0034] SRI, TRI, TPMI, etc., may be notified to the UE using Downlink Control Information (DCI). SRI may be specified by the SRS Resource Indicator field (SRI field) of the DCI, or by the parameter "srs-ResourceIndicator" included in the RRC information element "ConfiguredGrantConfig" of the configured grant PUSCH.

[0035] TRI and TPMI may also be specified by the DCI's "Precoding information and number of layers" field. For simplicity, the "Precoding information and number of layers" field is also referred to as the "Precoding information field."

[0036] The UE may report UE capability information regarding the precoder type, and the base station may set the precoder type based on this UE capability information via upper-layer signaling. This UE capability information may also be information about the precoder type that the UE uses in PUSCH transmission (for example, it may be represented by the RRC parameter "pusch-TransCoherence").

[0037] The UE may determine which precoder to use for PUSCH transmission based on precoder type information (e.g., the RRC parameter "codebookSubset") contained in PUSCH configuration information (e.g., the "PUSCH-Config" information element of the RRC signaling) notified by higher-layer signaling. The UE may also set a subset of the PMI specified by TPMI using codebookSubset.

[0038] The precoder type may be specified by fully coherent, partially coherent, or non-coherent, or by a combination of at least two of these (for example, they may be represented by parameters such as "fullyAndPartialAndNonCoherent" or "partialAndNonCoherent").

[0039] For example, the RRC parameter "pusch-TransCoherence" indicating UE capability may indicate full coherent, partial coherent, or noncoherent. Similarly, the RRC parameter "codebookSubset" may indicate "fullyAndPartialAndNonCoherent," "partialAndNonCoherent," or "noncoherent."

[0040] Fully coherent may mean that all antenna ports used for transmission are synchronized (this may also be expressed as being able to align phases, being able to control phase for each coherent antenna port, or being able to apply a precoder appropriately to each coherent antenna port). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those ports are not synchronized with the others. Non-coherent may mean that the individual antenna ports used for transmission are not synchronized.

[0041] Furthermore, a UE that supports fully coherent precoder types may be assumed to support partially coherent and noncoherent precoder types. A UE that supports partially coherent precoder types may be assumed to support noncoherent precoder types.

[0042] In this disclosure, precoder type, coherency, push transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc., may be interpreted interchangeably.

[0043] The UE may determine a precoding matrix from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmissions that corresponds to the TPMI index obtained from the DCI (e.g., DCI format 0_1; hereafter the same) for scheduling UL transmissions.

[0044] Figure 1-4 shows an example of the association between a codebook subset and the TPMI index. Figure 1 corresponds to the table of precoding matrices W for single-layer (rank 1) transmission using four antenna ports when transform precoding (also called transform precoder) is disabled in Rel. 16 NR. In Figure 1, the corresponding W are shown from left to right in ascending order of the TPMI index (the same applies to Figure 2-4).

[0045] The correspondence between TPMI indexes and corresponding W values, as shown in Figure 1-4 (which may also be called a table), is also known as a codebook. A portion of this codebook is also called a codebook subset.

[0046] In Figure 1, if the codebook subset is fully, partially, and noncoherent, the UE is notified of one of the TPMIs from 0 to 27 for single-layer transmissions. If the codebook subset is partially and noncoherent, the UE is set to one of the TPMIs from 0 to 11 for single-layer transmissions. If the codebook subset is noncoherent, the UE is set to one of the TPMIs from 0 to 3 for single-layer transmissions.

[0047] Figures 2-4 correspond to tables of precoding matrices W for 2-4 layer (rank 2-4) transmission using 4 antenna ports when transform precoding is disabled in Rel.16 NR.

[0048] According to Figure 2, the TPMIs that the UE is notified of for a 2-layer transmission are 0 to 21 (codebook subset is complete, partial, and noncoherent), 0 to 13 (precoder type is partial and noncoherent), or 0 to 5 (precoder type is noncoherent).

[0049] According to Figure 3, the TPMIs that the UE is notified of for a 3-layer transmission are 0 to 6 (codebook subset is complete, partial, and noncoherent), 0 to 2 (precoder type is partial and noncoherent), or 0 (precoder type is noncoherent).

[0050] According to Figure 4, the TPMIs that the UE is notified of for a 4-layer transmission are 0 to 4 (codebook subset is complete, partial, and noncoherent), 0 to 2 (precoder type is partial and noncoherent), or 0 (precoder type is noncoherent).

[0051] A precoding matrix in which each column has exactly one non-zero element may be called a non-coherent codebook. A precoding matrix in which each column has a specific number of non-zero elements (greater than one, but not the total number of elements in the column) may be called a partially coherent codebook. A precoding matrix in which all elements in each column are non-zero may be called a fully coherent codebook.

[0052] Non-coherent codebooks and partially coherent codebooks may also be called antenna selection precoders, antenna port selection precoders, etc. For example, a non-coherent codebook (non-coherent precoder) may also be called a one-port selection precoder, a one-port port selection precoder, etc. A partially coherent codebook (partially coherent precoder) may also be called an x-port (x is an integer greater than 1) selection precoder, a port selection precoder for x ports, etc. A fully coherent codebook may also be called a non-antenna selection precoder, an all-port precoder, etc.

[0053] In this disclosure, a partially coherent codebook may refer to a subset of codebooks (precoding matrices) corresponding to TPMIs specified by DCI for codebook-based transmission, obtained by a UE with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") set, excluding the codebooks corresponding to TPMIs specified by a UE with a noncoherent codebook subset (e.g., RRC parameter "codebookSubset" = "nonCoherent") set (i.e., for single-layer transmission with 4 antenna ports, the codebooks for TPMIs 4 through 11).

[0054] In this disclosure, a fully coherent codebook may refer to a subset of fully coherent codebooks (e.g., RRC parameter "codebookSubset" = "fullyAndPartialAndNonCoherent") set to a UE that corresponds to a TPMI specified by DCI for codebook-based transmission, excluding the codebooks corresponding to TPMIs specified by a UE that has a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") set to a UE (i.e., for single-layer transmission with 4 antenna ports, the codebooks for TPMIs 12 to 27).

[0055] (Size of the pre-coding information field) As described above, the UE may determine the TPMI and layer number (transmission rank) for a PUSCH based on the precoding information field of the DCI (e.g., DCI format 0_1 / 0_2) that schedules the PUSCH.

[0056] For codebook-based PUSCH, the number of bits in the precoding information field may be determined (and may vary) based on settings such as enabling or disabling the transform precoder for PUSCH (e.g., upper layer parameter transformPrecoder), setting the codebook subset for PUSCH (e.g., upper layer parameter codebookSubset), setting the maximum number of layers for PUSCH (e.g., upper layer parameter maxRank), setting uplink full power transmission for PUSCH (e.g., upper layer parameter ul-FullPowerTransmission), and the number of antenna ports for PUSCH.

[0057] Figure 5 shows an example of the correspondence between the field values ​​for precoding information and layer count in Rel.16 NR and the layer count and TPMI. The correspondence in this example is for a 4-antenna port when the transform precoder is disabled, the maximum rank (maxRank) is set to 2, 3, or 4, and uplink full power transmission is not set, or is set to full power mode 2, or is set to full power, but is not limited to this. It should be obvious to those skilled in the art that the "bit fields mapped to the index" shown represent the field values ​​for precoding information and layer count.

[0058] In Figure 5, the precoding information field is 6 bits when the UE is set to a fully coherent (fullyAndPartialAndNonCoherent) codebook subset, 5 bits when it is set to a partially coherent (partialAndNonCoherent) codebook subset, and 4 bits when it is set to a nonCoherent codebook subset.

[0059] As shown in Figure 5, the number of layers and TPMI corresponding to a value in a precoding information field may be the same (common) regardless of the codebook subset set in the UE. For example, in Figure 5, the number of layers and TPMI indicated by precoding information field values ​​= 0-11 may be the same for fully coherent (fullyAndPartialAndNonCoherent), partially coherent (partialAndNonCoherent), and noncoherent codebook subsets. Also, in Figure 5, the number of layers and TPMI indicated by precoding information field values ​​= 0-31 may be the same for fully coherent (fullyAndPartialAndNonCoherent) and partially coherent (partialAndNonCoherent) codebook subsets.

[0060] Note that the precoding information field may be 0 bits for non-codebook-based pushers. Also, the precoding information field may be 0 bits for codebook-based pushers with one antenna port.

[0061] (Transmission with more than 4 antenna ports) Rel.15 / 16 NR supports uplink (UL) Multi-Input Multi-Output (MIMO) transmission up to 4 layers. For future wireless communication systems, support for UL transmission with more than 4 layers is being considered to achieve higher spectral efficiency. For example, for Rel.18 NR, up to 6 ranks of transmission using 6 antenna ports, and up to 6 or 8 ranks of transmission using 8 antenna ports are being considered.

[0062] Figures 6A and 6B show examples of antenna layouts for an 8-antenna port. Figure 6A shows an example where the 8 antennas are arranged in one dimension (1D), and Figure 6B shows an example where the 8 antennas are arranged in two dimensions (2D). Figure 6A corresponds to an antenna configuration with four cross-polarized antennas arranged horizontally. Figure 6B corresponds to an antenna configuration with two cross-polarized antennas arranged horizontally and two vertically.

[0063] Note that the numbers shown in the diagram may indicate the numbers of the antenna ports corresponding to the antennas.

[0064] Note that the antenna layout is not limited to these. For example, the number of panels on which the antennas are placed, the orientation of the panels, the coherence of each panel / antenna (fully coherent, partially coherent, noncoherent, etc.), the antenna arrangement in a specific direction (horizontal, vertical, etc.), and the polarization antenna configuration (single polarization, cross polarization, number of polarization planes, etc.) may differ from the examples in Figures 6A and 6B.

[0065] Furthermore, while Rel.15 / 16 NR supported the transmission of one codeword (Codeword(CW)) per pusher, for Rel.18 NR, it is being considered that UEs will transmit more than one CW from a single pusher. For example, support for two CW transmissions for ranks 5-8 and two CW transmissions for ranks 2-8 are being considered.

[0066] Furthermore, while it is assumed that only one beam / panel is used for UL transmission at any given time in UEs of Rel.15 and Rel.16, in Rel.17 and later, simultaneous UL transmission of multiple beams / panels (e.g., PUSCH transmission) is being considered for one or more TRPs to improve UL throughput and reliability. Note that simultaneous PUSCH transmission of multiple beams / panels may correspond to PUSCH transmission with more than 4 layers, or to PUSCH transmission with 4 or fewer layers.

[0067] However, there has been little progress in determining how to determine the precoding matrix for UL transmission using more than four antenna ports. For example, there has been little progress in developing a codebook for 1-8 layer transmission using eight antenna ports. Failure to clarify this could limit the increase in communication throughput.

[0068] Therefore, the inventors conceived a method for properly performing UL transmission using more than four antenna ports.

[0069] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0070] In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0071] In this disclosure, terms such as activate, deactivate, indicate, select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and operable may be interpreted interchangeably.

[0072] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, information elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably. Settings may be performed (or notified) based on RRC signaling, and activation / deactivation may be performed (or notified) based on MAC CE.

[0073] In this disclosure, the upper-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0074] In this disclosure, MAC signaling may include, for example, MAC Control Elements (MAC CEs) and MAC Protocol Data Units (PDUs). Broadcast information may include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), and Other System Information (OSIs).

[0075] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0076] In this disclosure, terms such as index, identifier (ID), indicator, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interpreted interchangeably.

[0077] In this disclosure, the terms used include: panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmit entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relationship, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna, antenna element, layer, transmit, port, antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control 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), QCL assumptions, etc., may be interpreted interchangeably.

[0078] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information" may be interpreted as mutually exclusive as "a set of spatial relationship information," "one or more spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive.

[0079] In this disclosure, fields, parameters, information elements (IE), etc., may be interpreted interchangeably.

[0080] In the following embodiments, "multiple" and "two" may be interchangeable.

[0081] The number of layers for a push transmission in the following embodiments may be greater than or equal to 4. For example, two CW push transmissions in this disclosure may be performed with a number of layers of 4 or less (e.g., 2). The maximum number of layers is also not limited to 4 or more, and may be less than 4.

[0082] Furthermore, the PUSCH transmission in the following embodiments may or may not be based on the assumption of using multiple panels (it may be applied regardless of the number of panels).

[0083] In the following embodiments, the number "8" may be replaced with any number greater than 4 (for example, 6, 10, 12, 16, ...) or with any number less than or equal to 4 (for example, 1, 2, 3, 4).

[0084] (Wireless communication method) <First Embodiment> The first embodiment relates to a precoding matrix W for i-layer (where i is an integer, e.g., i=1, 2, ..., 8) transmission using 8 antenna ports.

[0085] Regarding the correspondence (codebook) between the TPMI index and the above precoding matrix, a new correspondence (codebook) not found in existing standards may be used. This codebook may be called, for example, the 8-transmit UL codebook (8 TX UL codebook).

[0086] For an 8-transmit UL codebook, one or more UE coherent assumptions (UE coherent capabilities) and one or more codebook subset settings may be applied.

[0087] For the 8 ports, existing RRC parameters (or UE capabilities) such as "pusch-TransCoherence" and "codebookSubset" may be used. For example, for the 8 ports, the UE may determine the TPMI index for the 8 Transmit UL codebook based on nonCoherent, partialCoherent, fullCoherent, partialAndNonCoherent, fullyAndPartialAndNonCoherent, etc.

[0088] For the 8 ports, new RRC parameters (or UE capabilities) may be used. For example, the UE may report capability information to the network (e.g., base stations) indicating that it supports full / partial / noncoherent transmissions for a certain number of ports or less, or it may set RRC parameters indicating that it uses a subset of the full / partial / noncoherent codebook for transmissions for a certain number of ports or less.

[0089] In this disclosure, terms such as "less than or equal to," "less than," "greater than or equal to," and "greater than" may be interpreted interchangeably.

[0090] Furthermore, information indicating which of the eight ports are coherent (or which ports will be used as coherent) may be reported by the UE or configured on the UE.

[0091] Furthermore, for the 8 ports, a UE that supports partial coherence (has partial coherence capability) may transmit information (included in capability information) about which antenna port combinations are coherent. This information may be called coherent port information, etc.

[0092] The coherent port information may be a bitmap the size of the number of ports, and for example, a bit that is '1' (or '0') may mean that the ports are coherent with each other.

[0093] Coherent port information may also be information about a coherent group, where a coherent group may contain X coherent ports (where X is an integer greater than or equal to 1). Information about a coherent group may indicate that a coherent group contains X ports, or it may indicate the port numbers of each of the X coherent ports included in a coherent group.

[0094] Figure 7 shows an example of an 8-antenna port antenna layout to illustrate the coherence information of the first embodiment. Figure 7 is similar to Figure 6A, but antennas 0, 1, 4, and 5 are coherent with each other, and antennas 2, 3, 6, and 7 are coherent with each other.

[0095] In this example, antenna numbers 0, 1, 4, and 5 are referred to as the first coherent group, and antenna numbers 2, 3, 6, and 7 are referred to as the second coherent group. The antennas in the first coherent group and the antennas in the second coherent group are not coherent with each other.

[0096] With respect to Figure 7, the UE may include capability information indicating that it supports full coherence for 4 or fewer ports and partial coherence for 5 or more ports.

[0097] With respect to Figure 7, the UE may transmit, as coherent port information, at least one of the bitmaps “11001100” indicating a first coherent group and the bitmap “11001100” indicating a second coherent group.

[0098] With respect to Figure 7, the UE may report as coherent port information a value of 4, which is the number of ports included in the first coherent group (or that port numbers 0, 1, 4, and 5 are included in a coherent group), or it may report a value of 4, which is the number of ports included in the second coherent group (or that port numbers 2, 3, 6, and 7 are included in another coherent group).

[0099] Furthermore, one coherent group may be further divided into multiple coherent groups. Such classification of coherent groups is expected to enable flexible control. With respect to Figure 7, the UE may report 2 as a value indicating the number of ports included in one coherent group (or that port numbers 2 and 3 are included in one coherent group), or it may report 2 as a value indicating the number of ports included in another coherent group (or that port numbers 6 and 7 are included in another coherent group).

[0100] The 8-transmit UL codebook for PUSCH in the first embodiment may be used if at least one of the following conditions is met: If the transform precoder for PUSCH is disabled for UE, If the RRC configures more than 4 ports for PUSCH / SRS (for CB-based PUSCH) for the UE, If more than 4 ports are configured / activated / specified for PUSCH / SRS (for CB-based PUSCH) to the UE by RRC / MAC CE / DCI.

[0101] As can be seen from the above, in the first embodiment, the number of ports in the precoding matrix used may be set quasi-statically by RRC. Also, in the first embodiment, the fallback (or switching) from using a precoding matrix with more than 4 ports to using a precoding matrix with 4 or fewer ports may be performed dynamically by MAC CE / DCI.

[0102] Furthermore, the UE may use (reference) a common 8-transmit UL codebook regardless of the antenna layout (antenna configuration). Alternatively, the UE may use (reference) a different 8-transmit UL codebook for each antenna layout (antenna configuration).

[0103] The UE may report UE capability information regarding the antenna layout. The base station may, for example, transmit to the UE information specifying / identifying / configuring the 8 Transmit UL codebook to be used by the UE, based on the said UE capability information. The UE may determine which 8 Transmit UL codebook to use based on the reported UE capability information and the received information specifying / identifying / configuring the 8 Transmit UL codebook.

[0104] According to the first embodiment described above, the 8-transmit UL codebook can be used appropriately.

[0105] <Second Embodiment> The second embodiment relates to a non-coherent precoder (a one-port port selection precoder) for single-layer transmission for eight antenna ports.

[0106] Hereinafter, for simplicity, non-coherent precoders, partially coherent precoders, and fully coherent precoders will also be referred to simply as NC (non-coherent) precoders, PC (partial coherent) precoders, and FC (full coherent) precoders, respectively.

[0107] Furthermore, in this disclosure, for simplicity, an NC / PC / FC precoder for i-layer (i is an integer; i=1 for single-layer) transmission of n antenna ports (n is an integer) will also simply be referred to as an n-port i-layer NC / PC / FC precoder.

[0108] The 8-port 1-layer NC precoder has W=[1 0 0 0 0 0 0] T [0 1 0 0 0 0 0 0] T , …, [0 0 0 0 0 0 0 1] T There are eight possible combinations (where T represents the transpose matrix; the same applies below).

[0109] Support for multiple 8-port 1-layer NC precoders (available by the UE, as specified in the standard) is preferable for transmit antenna switching. On the other hand, from the perspective of reducing the number of TPMI index candidates for precoder selection and reducing communication overhead, the UE does not need to have all 8 options available at any given time.

[0110] The second embodiment can be further divided into four main types (Embodiments 2.1-2.4).

[0111] [Embodiment 2.1] In Embodiment 2.1, the 8-port 1-layer NC precoder may support all eight of the above options, or all eight of the above options may be instructed based on the TPMI index.

[0112] [Embodiment 2.2] In Embodiment 2.2, all eight of the above eight types of 8-port 1-layer NC precoders are supported, but some of the above eight types (e.g., one or more) may be configured / updated / activated for the UE by the RRC / MAC CE. The TPMI index notified by DCI may correspond only to the configured / updated / activated precoders. For example, the UE may be specified by the RRC / MAC CE as a port index / element index whose value in the 1-port port selection precoder is 1.

[0113] In this disclosure, the element index may indicate the position of the row (or column) component whose value is 1 (or non-zero). For example, element index = port index + 1.

[0114] [Embodiment 2.3] In Embodiment 2.3, at least one of the following precoders may be supported as the 8-port 1-layer NC precoder: • A port selection precoder for a single port where the port index / element index has a value of 1 and is only odd. • A port selection precoder for a single port where the port index / element index has a value of 1 and is even only. • A port selection precoder for one port contained in i that satisfies the port index / element index with a value of 1 i mod k = l (k, l is an integer, for example, 4 (=8 / 2)), A 1-port port selection precoder created by inserting four zeros into the existing 4-port 1-layer NC precoder in Rel.15 / 16 NR.

[0115] Regarding where to insert the four zeros mentioned above, for example, the four zeros may be inserted so that the elements of the existing Rel.15 / 16 NR 4-port 1-layer NC precoder become the first or last four elements of the 8-port 1-layer NC precoder, or the four zeros may be inserted so that they become the odd or even index ports / elements of the 8-port 1-layer NC precoder. In other words, the four zeros may be inserted uniformly (at equal intervals). The 8-port 1-layer NC precoder may also be scaled (adjusted) so that the coefficients (or the absolute value of each component) are 1 / √8 (or a specific value).

[0116] [Embodiment 2.4] In Embodiment 2.4, the 8-port 1-layer NC precoder may be some (e.g., one or more) of the NC precoders in Embodiment 2.3 that are configured / updated / activated by the RRC / MAC CE.

[0117] Figures 8A and 8B show an example of a supported 8-port 1-layer NC precoder according to the second embodiment. Figure 8A shows the precoders included in i (i.e., i=1, 5) where the port index / element index with a value of 1 satisfies i mod 4 = 1 (corresponding to Embodiment 2.3; the two precoders enclosed in squares).

[0118] Figure 8B shows an 8-port 1-layer NC precoder (corresponding to Embodiment 2.4) in which, for each of the 4-port 1-layer NC precoders (TPMI index = 0-3) shown in Figure 1, four zeros are inserted into the even-indexed ports / elements so that the elements become ports / elements with odd indices.

[0119] According to the second embodiment described above, the UE can appropriately utilize the 8-port 1-layer NC precoder.

[0120] <Third Embodiment> The third embodiment relates to an 8-port 1-layer PC precoder (a port selection precoder for x ports among the 8 ports, where 1<x<8).

[0121] For x-port port selection, port positions with non-zero values are obtained by C(8, x), which is the combination of x ports out of 8 ports. Furthermore, for x-port port selection, the value of the first port is 1, and the values (in other words, phases) of the other ports can be {1, j, -1, -j}, where j is the imaginary unit. Taking these into consideration, the number M of candidates for the 8-port 1-layer PC precoder is M=C(8, x)*4 (x-1) . For example, when x=2, M=C(8, 2)*4 (2-1) =28*4, when x=4, M=C(8, 4)*4 (4-1) =70*4 3 , and when x=6, M=C(8, 6)*4 (6-1) =28*4 5 .

[0122] Figure 9 is a diagram showing an example of a supported 8-port 1-layer PC precoder according to the third embodiment. This example shows all candidates (28*4 candidates) for the 8-port 1-layer PC precoder when x=2.

[0123] The third embodiment may be an embodiment obtained by replacing "NC precoder" with "PC precoder", replacing "1-port port selection precoder" with "x-port port selection precoder", replacing "8 types" with "C(8, x)*4 (x-1) types", and replacing "the value is 1" with "the value of the first port is 1 and the values of the other ports are {1, j, -1, -j}" in the second embodiment (Embodiments 2.1 to 2.4). The third embodiments corresponding to Embodiments 2.1 to 2.4 are referred to as Embodiments 3.1 to 3.4, respectively.

[0124] For Embodiment 3.3, any one of the following or a combination thereof may be introduced (adopted, used): Option 1: Only port selection precoders for a specific x port (e.g., x=4) are supported. Option 2: The port selection precoder for a specific x port is a precoder where each non-zero port index / element index is contained in i such that i mod k = l(k, l is an integer, where k is, for example, 8 / x). Option 3: The port selection precoder for a specific x port supports only specific values ​​for that port, or the order of values ​​for that x port follows a specific rule. • Option 4: When selecting x ports as a group, the number of ports that can be selected as that group is determined based on the UE capabilities configured or reported by the RRC.

[0125] Regarding option 2 above, for example, if x=2, the two selected ports may be element indices (1, 5), (2, 6), (3, 7), or (4, 8), and if x=4, the four selected ports may be element indices (1, 3, 5, 7), or (2, 4, 6, 8). Option 2 above may also mean that the positions of the port indices are selected uniformly.

[0126] Regarding option 4 above, the group may be a coherent group (as described above in the first embodiment). For example, for a UE having the antenna layout of Figure 7, if x=2, port indices (1, 4) may be grouped, or port indices (2, 6) may be grouped. Also, if x=4, port indices (0, 1, 4, 5) may be grouped, or port indices (2, 3, 6, 7) may be grouped.

[0127] Figures 10A-10C show an example of a supported 8-port 1-layer PC precoder (x=2) according to Embodiment 3.3. Figure 10A shows an example where option 2 and option 3 are assumed to support only the value '1' for the second port.

[0128] Figure 10B shows an example of option 3 above, where it is assumed that the second port supports any value of {1, j, -1, -j}.

[0129] Figure 10C shows an example where option 2 and option 3 above are assumed to support any value of {1, j, -1, -j} for the second port.

[0130] Furthermore, in Embodiment 3.3, four zeros may be inserted into each of the existing 4-port 1-layer PC precoders in Rel.15 / 16 NR (for example, the 4-port 1-layer PC precoder shown in Figure 1 (TPMI index = 4-11)) to obtain up to eight 2-port select precoders out of eight ports.

[0131] Furthermore, in Embodiment 3.3, four zeros may be inserted into the existing Rel.15 / 16 NR's 4-port FC precoder to obtain a 4-port select precoder. For example, four zeros may be inserted into each of the existing Rel.15 / 16 NR's 4-port 1-layer FC precoders (the 4-port 1-layer FC precoder shown in Figure 1 (TPMI index = 12-27)) to obtain up to 16 4-port select precoders out of 8 ports.

[0132] RRC configuration / MAC CE updates based on these port selection precoders may also be available.

[0133] Furthermore, the 8-port 1-layer PC precoder may be scaled (adjusted) so that the coefficients (or the absolute value of each component) become 1 / √8 (or a specific value).

[0134] According to the third embodiment described above, the UE can appropriately utilize the 8-port 1-layer PC precoder.

[0135] <Fourth Embodiment> The fourth embodiment relates to an 8-port 1-layer FC precoder.

[0136] As an 8-port 1-layer FC precoder in the fourth embodiment, the number of CSI-RS antenna ports (P) in an existing Rel.15 / 16 NR CSI-RS For )=8, the DL Type I single panel codebook precoder W may be used.

[0137] First, we will explain the DL Type I single panel codebook for the existing Rel.15 / 16 NR.

[0138] Figures 11A and 11B show the existing Rel.15 / 16 NR, P CSI-RS This figure shows an example of a codebook for 1-layer CSI reporting using individual antenna ports. The codebook in Figure 11A corresponds to codebook mode = 1. The codebook mode is set in the UE by the RRC parameter codebookMode.

[0139] Here, N1 and N2 represent the number of antenna ports in the first and second dimensions, respectively. For example, N1 may correspond to the number of vertical antenna ports and N2 to the number of horizontal antenna ports, but the directions are not limited to these. For example, the antenna layout in Figure 6A above may correspond to (N1, N2) = (4, 1), and the antenna layout in Figure 6B may correspond to (N1, N2) = (2, 2). N1 and N2 are set in the UE by the RRC parameters n1-n2.

[0140] O1 and O2 correspond to the oversampling coefficients (spatial oversampling rates) corresponding to N1 and N2, respectively, and may be obtained based on the correspondence shown in Figure 11B.

[0141] The value of the Precoding Matrix Indicator (PMI) that the UE reports to the base station (for example, using a CSI report) is i 1,1 i 1,2 And it corresponds to i2. 1,1 i 1,2 And i2 correspond to the precoder W. The precoder W is the matrix ν considering the first and second dimensions described above. l,m It corresponds to.

[0142] Figures 12A and 12B show the existing Rel.15 / 16 NR, P CSI-RS This figure shows an example of a codebook for 1-layer CSI reporting using individual antenna ports. The codebook in Figure 12A corresponds to codebook mode = 2 and N2 > 1. The codebook in Figure 12B corresponds to codebook mode = 2 and N2 = 1.

[0143] Codebook mode = 1 corresponds to the case where the same beam (e.g., the same spatial domain (SD) beam, the same spatial direction beam, the same direction beam) is applied to two different polarizations, and only phase selection is considered for these two different polarizations. Codebook mode = 2 corresponds to the case where both beam and phase selection are considered for two different polarizations.

[0144] As an 8-port 1-layer FC precoder in the fourth embodiment, the number of CSI-RS antenna ports (P) in an existing Rel.15 / 16 NR CSI-RS Precoder W of the DL Type I single panel codebook for )=8 (more precisely, W in Figures 11A, 12A and 12B) l,m,n (1) If ) is used, the specification for the 8-port 1-layer FC precoder is i 1,1 i 1,2 i2 (or equivalent variables; the same applies hereafter) may also be used.

[0145] The 8-port 1-layer FC precoder of the fourth embodiment may be the same as or different from the precoder W in the existing Rel.15 / 16 NR (it may also be an extended / modified precoder of W).

[0146] The TPMI index notified by DCI may be at least one of the following: • The TPMI index is i 1,1 i 1,2 And the three indices of i2 that correspond to (or are), • The TPMI index is i 1,1 i 1,2 and two of i2 (for example, i 1,1 and i 1,2 The first index relating to the index of ) and i 1,1 i 1,2 and a second index relating to the remaining (e.g., i2) of i2, and the corresponding (or indicating / is) the second index relating to i2. • The TPMI index is i 1,1 i 1,2 And it corresponds to (or is) the third index with respect to the three indexes of i2.

[0147] Note, i 1,1 i 1,2 and two of i2 (for example, i 1,1 and i 1,2 The correspondence between the index of ) and the first index, i 1,1 i 1,2 And the correspondence between the remaining (for example, i2) indexes of i2 and the second index, i 1,1 i 1,2 The correspondence between the three indices of i2 and the third index may be predetermined by the standard, or it may be set / specified by the UE through RRC signaling / MAC CE.

[0148] For example, the third index is i 1,1 i 1,2It may also be based on a combination of i2. The third index (TPMI index) = (I2*N2*O2)*a + I2*b + c is (i 1,1 i 1,2 It may also be expressed as i2 = (a, b, c). Here, I2 is the number of possible values ​​for i2 in the target codebook (4 in Figure 11A, 16 in Figures 12A and 12B).

[0149] For example, regarding Codebook Mode = 1, TPMI Index = 0 is (i 1,1 i 1,2 i2)=(0,0,0), TPMI index=1 is (i 1,1 i 1,2 i2)=(0,0,1), ..., TPMI index=(4*N2*O2)*(N1*O1-1)+4*(N2*O2-1)+3 is (i 1,1 i 1,2 You can also prove that i2) = (N1*O1-1, N2*O2-1, 3).

[0150] Furthermore, to control the number of TPMI indices and the overhead of the DCI precoding information field, the possible values ​​for the TPMI index may be set / specified by the RRC / MAC CE. For example, the UE may use the TPMI index to set (i) as enabled by the RRC / MAC CE. 1,1 i 1,2 It may be assumed that only the pair i2) is specified, and the size (or possible value) of the precoding information field / TPMI index is set to the above enabled (i 1,1 i 1,2 The decision may also be based on the number of pairs (for example, the number of pairs) of i2).

[0151] An 8-transmit UL codebook according to the first embodiment may be defined based on the NC precoder according to the second embodiment, the PC precoder according to the third embodiment, and the FC precoder according to the fourth embodiment.

[0152] For example, if "fullyAndPartialAndNonCoherent" is set as the codebook subset for the UE, the TPMI index may specify precoders from NC, PC, and FC precoders. For example, if X1 NC precoders, X2 PC precoders, and X3 FC precoders are supported / configured, the range of the TPMI index (the range of possible values) may be greater than or equal to 0 and less than or equal to (X1+X2+X3-1). Note that X3 may also be N1*O1*N2*O2*I2.

[0153] In this case, TPMI index = 0 to X1-1 may indicate an NC precoder, TPMI index = X1 to X1+X2-1 may indicate a PC precoder, and TPMI index = X1+X2 or higher may indicate an FC precoder. TPMI index = X1+X2 is the first FC precoder (for example, (i 1,1 i 1,2 You may also show the FC precoder corresponding to i2)=(0,0,0). For example, (i 1,1 i 1,2 The FC precoder corresponding to i2)=(a, b, c) may be represented by the TPMI index = X1+X2+(I2*N2*O2)*a+I2*b+c.

[0154] When "partialAndNonCoherent" is set as the codebook subset for the UE, the TPMI index may specify precoders from NC and PC precoders. For example, if X1 NC precoders and X2 PC precoders are supported / configured, the range of the TPMI index may be 0 or greater and (X1+X2-1) or less. In this case, TPMI index = 0 to X1-1 may indicate NC precoders, and TPMI index = X1 or greater may indicate PC precoders.

[0155] Figure 13 shows an example of the association between the precoder according to the second to fourth embodiments and the TPMI index. In this example, the parameters X1=2, X2=4, X3=64, N1=O1=4, N2=O2=1, and codebook mode=1 are assumed.

[0156] In this example, X1 NC precoders are the two NC precoders shown in Figure 8A, and X2 PC precoders are the four PC precoders shown in Figure 10A. Additionally, X3 FC precoders are the precoders W from the existing Rel.15 / 16 NR Type I single panel codebook. i_{1,1},i_{1,2},i_{2} (1) That is the case.

[0157] In this example, TPMI indices 0-1 correspond to NC precoders, TPMI indices 2-5 correspond to PC precoders, and TPMI indices 6-69 correspond to FC precoders.

[0158] [Modified version of the fourth embodiment] [[Antenna Layout and 8 Transmitting UL Codebook]] Different 8-transmit UL codebooks may be supported / configured for each antenna layout of the UE. For example, different 8-transmit UL codebooks may be supported / configured for (N1, N2)=(4, 1) and (N1, N2)=(2, 2). The UE may configure N1 and N2 for the 8-transmit UL codebook by RRC, for example, as in the existing codebook configuration (RRC information element codebookConfig) for CSI measurements. Alternatively, N1 and N2 may be updated / specified for the 8-transmit UL codebook by MAC CE / DCI.

[0159] Furthermore, the UE may report capability information regarding the UE antenna layout (e.g., capability information indicating the number of antennas for each dimension), or it may report supported N1 / N2 values, or it may report preferred (prefreed) N1 / N2 values. Furthermore, the UE may report preferred N1 / N2 values ​​as capability information, or it may report them using MAC CE / UCI.

[0160] Furthermore, the base station may use RRC / MAC CE / DCI to notify the UE of information regarding the N1 / N2 values ​​for determining the number of FC precoders to be included in a particular 8-transmit UL codebook, based on the reported capability information or the supported / preferred N1 / N2 values.

[0161] Regardless of the UE's antenna layout, one 8-transmit UL codebook may be supported / configured. For example, if the standard specifies or configures only one 8-transmit UL codebook following (N1, N2) = (2, 2), the UE may use that 8-transmit UL codebook for 8-antenna port transmission, regardless of its antenna layout (or reported or configured N1 / N2 values).

[0162] [[Codebook Mode Settings]] The UE may support two codebook modes for the 8-transmit UL codebook, and the RRC / AC CE / DCI may configure / specify which codebook mode to use when referencing the UL codebook.

[0163] The UE may support only one codebook mode for an 8-transmit UL codebook. In this case, that single codebook mode may be codebook mode = 1. This can lead to simplification of control signals, reduction of overhead, and other benefits.

[0164] Furthermore, N1, N2, codebook mode, etc., may be configured in the UE using UL codebook settings (which may be called, for example, the RRC information element ulCodebookConfig). The UL codebook settings may be included in at least one of the PUSCH configuration information (RRC information element PUSCH-Config) and configured grant configuration information (RRC information element ConfiguredGrantConfig) and communicated to the UE.

[0165] [[O1 / O2 values]] The O1 / O2 values ​​for the 8 Transmit UL Codebook may be derived based on the same correspondence with N1 / N2 as in the existing DL (Figure 11B).

[0166] The O1 / O2 values ​​for the 8-transmit UL codebook may be derived to be smaller (or larger) than the O1 / O2 values ​​for the existing DL corresponding to the same N1 / N2. In this case, a new correspondence different from the existing correspondence (Figure 11B) may be defined and used for the 8-transmit UL codebook. In this new correspondence, O1 may be 1, 2, or 4, and O2 may be 1, 2, or 4.

[0167] The O1 / O2 values ​​for an 8-transmit UL codebook may be set / specified to the UE by RRC / MAC CE / DCI. In this case, the UE may report the supported (maximum) O1 / O2 values ​​as UE capability information. Based on the reported supported (maximum) O1 / O2 values, the base station may notify the UE using RRC / MAC CE / DCI of information regarding the O1 / O2 values ​​to determine the number of FC precoders included in a particular 8-transmit UL codebook.

[0168] [[Value of i2]] The possible values ​​for i2 for the 8-transmit UL codebook may be narrower than the possible values ​​for i2 for the existing Rel.15 / 16 DL (the maximum value of the candidate values ​​may be smaller). In this case, a reduction in the number of precoders and the overhead associated with DCI's TPMI notification can be expected.

[0169] For example, for a codebook mode = 1 for an 8-transmission UL codebook, only 0 or 1 may be supported / predefined / set as possible values ​​for i2. In this case, φ used in calculating the precoder W is used. n is the existing φ n =e jπn / 2 Instead, φ n =e jπn This is also acceptable. In other words, the φ used in calculating the precoder W n is, φ n =e jπ2n / I2 It could also be (where I2 is the number of possible values ​​for i2, as described above).

[0170] Furthermore, the possible values ​​for i2 for the 8-transmission UL codebook may be wider than the possible values ​​for i2 for the existing Rel.15 / 16 DL (the maximum value of the candidate values ​​may be larger).

[0171] Figure 14 shows an example of an 8-transmission UL codebook according to a modification of the fourth embodiment. In this example, the parameters X1=2 and X2=4 are assumed. Also, only codebook mode=1 is supported for the 8-transmission UL codebook. Furthermore, for the 8-transmission UL codebook, (N1, N2)=(2, 2) is predefined or set to UE, (O1, O2)=(2, 1) is predefined or set to UE, and I2=4 is predefined or set to UE.

[0172] In this case, X3 = N1 * O1 * N2 * O2 * I2 = 32. Compared to Figure 13, Figure 14 shows that the possible values ​​for the TPMI index have been reduced from 69 to 37.

[0173] Furthermore, for the 8-transmission UL codebook, if (N1, N2)=(2, 2) is predefined or set as UE, (O1, O2)=(1, 1) is predefined or set as UE, and I2=2 is predefined or set as UE, then X3=8.

[0174] Furthermore, the 8-port 1-layer FC precoder may be scaled (adjusted) so that the coefficients (or the absolute value of each component) become 1 / √8 (or a specific value).

[0175] According to the fourth embodiment described above, the UE can appropriately utilize the 8-port 1-layer FC precoder.

[0176] <Fifth Embodiment> The fifth embodiment relates to an 8-port 2-layer NC precoder.

[0177] An 8-port 2-layer NC precoder may be configured by including two different 1-port selection precoders in a column vector. Hereafter, precoders and vectors may be interpreted interchangeably.

[0178] For example, at least one of the matrices composed of two 1-port selection vectors (64 possibilities), which can be formed by combining two 1-port selection vectors (8 possibilities; the same column vectors as the 8-port 1-layer NC precoder in the second embodiment), may be used as an 8-port 2-layer NC precoder.

[0179] The fifth embodiment can be further divided into four main types (Embodiments 5.1-5.4).

[0180] [Embodiment 5.1] In Embodiment 5.1, the 8-port 2-layer NC precoder may support all combinations of the two vectors (64 possibilities), and all 64 possibilities may be indicated based on the TPMI Index (DCI).

[0181] [Embodiment 5.2] In Embodiment 5.2, all 64 of the above 8-port 2-layer NC precoders are supported, but some of the above 64 (e.g., one or more) may be configured / updated / activated for the UE by the RRC / MAC CE. The TPMI index notified by DCI may correspond only to the configured / updated / activated precoders. For example, the UE may be given two port indexes / element indices with a value of 1 in a 1-port port selection precoder by the RRC / MAC CE.

[0182] [Embodiment 5.3] In Embodiment 5.3, the 8-port 2-layer NC precoder may support at least one of the 64 combinations above, including the following two vectors (a first vector and a second vector): A first vector is selected according to the rules shown in the second embodiment, and a second vector is determined / selected according to specific rules based on the first vector. The two vectors are determined / selected from the configured (or used by the UE) 8-port 1-layer NC precoder. The two vectors are the column vectors created by inserting four zeros into each column of the existing Rel.15 / 16 NR 4-port 2-layer NC precoder.

[0183] The specific rule described above may also be, for example, a rule that determines if the port index / element index with a value of 1 in the selected first vector (8-port 1-layer NC precoder) is i (where i is an integer), then the second vector is an 8-port 1-layer NC precoder with a port index / element index of i+N (where N is an integer) that has a value of 1.

[0184] Regarding where to insert the four zeros mentioned above, for example, the four zeros may be inserted so that the elements of the existing Rel.15 / 16 NR 4-port 2-layer NC precoder become the first or last four elements of the 8-port 2-layer NC precoder, or the four zeros may be inserted so that they become the odd or even index ports / elements of the 8-port 2-layer NC precoder. The 8-port 2-layer NC precoder may also be scaled (adjusted) so that the coefficients (or the absolute value of each component) become 1 / √8 (or a specific value).

[0185] [Embodiment 5.4] In Embodiment 5.4, the 8-port 2-layer NC precoder may be some (e.g., one or more) of the NC precoders in Embodiment 5.3 that are configured / updated / activated by the RRC / MAC CE.

[0186] Figures 15A-15C show examples of supported 8-port 2-layer NC precoders according to the fifth embodiment. Figure 15A shows an example of a precoder in which two vectors are determined according to the N=2 rule of Embodiment 5.3. In this example, the cases i=1, 3, and 5 are shown, respectively. Figure 15B shows an example of a precoder in which two vectors are determined according to the N=4 rule (i=1) of Embodiment 5.3. Figure 15C shows an example of a precoder in which two vectors are determined according to the N=6 rule (i=1) of Embodiment 5.3.

[0187] Figure 16 shows an example of a supported 8-port 2-layer NC precoder according to the fifth embodiment. Figure 16 shows an example where the two precoders shown in Figure 8A are configured as candidates for an 8-port 1-layer NC precoder. In this case, the UE may use only the illustrated precoder, which is a column vector of these two precoders, as the 8-port 2-layer NC precoder.

[0188] According to the fifth embodiment described above, the UE can appropriately use an 8-port 2-layer NC precoder.

[0189] <Sixth Embodiment> The sixth embodiment relates to an 8-port 2-layer PC precoder.

[0190] The 8-port 2-layer PC precoder may be configured by including two different x-port selection precoders in its column vectors.

[0191] For example, at least one matrix formed by combining two x(1<x<8)-port selection vectors (the same column vectors as those in the 8-port 1-layer PC precoder of the third embodiment) and composed of the two x-port selection vectors may be used as the 8-port 2-layer PC precoder.

[0192] The sixth embodiment may correspond to an embodiment obtained by replacing "NC precoder" with "PC precoder", replacing "1-port port selection precoder" with "x-port port selection precoder", and replacing "8 ways" with "C(8, x)*4 (x-1) ways" and replacing "the value is 1" with "the first port has a value of 1, and the other ports have values of {1, j, -1, -j}" in the fifth embodiment (Embodiments 5.1 to 5.4). The sixth embodiments corresponding to Embodiments 5.1 to 5.4 are referred to as Embodiments 6.1 to 6.4, respectively.

[0193] For Embodiment 6.3, any one of the following or a combination thereof may be introduced (adopted, used): · Option 1: the two vectors are the same x-port port selection precoder (for example, x=4), · Option 2: the two vectors are the same x-port port selection precoder, and for each of these precoders, each non-zero port index / element index is included in i that satisfies i mod k = l (k and l are integers; k is the same for the two vectors (for example, 8 / x), and l is different for the two vectors). Option 3: The port selection precoder for a specific x port supports only specific values ​​for that port, or the order of values ​​for that x port follows a specific rule. • Option 4: When selecting x ports as a group, the number of ports that can be selected as that group is determined based on the UE capabilities configured or reported by the RRC. Option 5: Port indices / element indices of the first vector that are not 0 and port indices / element indices of the second vector that are not 0 belong to different groups.

[0194] For options 4 and 5 above, the group may be a coherent group (as described above in the first embodiment).

[0195] In addition, for Embodiment 6.3, four zeros may be inserted into each of the existing 4-port 2-layer PC precoders in Rel.15 / 16 NR (for example, the 4-port 2-layer PC precoder shown in Figure 2 (TPMI index = 6-13)) to obtain a 2-port select precoder out of 8 ports.

[0196] Figure 17 shows an example of an 8-port 2-layer PC precoder according to the sixth embodiment. Figure 17 shows an 8-port 2-layer NC precoder in which, for each of the 4-port 2-layer PC precoders (TPMI index = 6-13) shown in Figure 2, four zeros are inserted into the even-indexed ports / elements so that the elements are ports / elements with odd indices.

[0197] Furthermore, in Embodiment 6.3, four zeros may be inserted into the existing Rel.15 / 16 NR's 4-port FC precoder to obtain a 4-port select precoder. For example, four zeros may be inserted into each of the existing Rel.15 / 16 NR's 4-port 2-layer FC precoders (the 4-port 2-layer FC precoder shown in Figure 2 (TPMI index = 14-21)) to obtain a 4-port select precoder out of 8 ports.

[0198] RRC configuration / MAC CE updates based on these port selection precoders may also be available.

[0199] Furthermore, the 8-port 2-layer PC precoder may be scaled (adjusted) so that the coefficients (or the absolute value of each component) become 1 / √8 (or a specific value).

[0200] According to the sixth embodiment described above, the UE can appropriately utilize the 8-port 2-layer PC precoder.

[0201] <Seventh Embodiment> The seventh embodiment relates to an 8-port 2-layer FC precoder.

[0202] The seventh embodiment is an embodiment in which the use of the DL Type I single panel codebook precoder W as an 8-port 1-layer FC precoder in the fourth embodiment is similarly applied to a 2-layer precoder. As those skilled in the art will be able to obtain an 8-port 2-layer FC precoder based on the DL Type I single panel codebook precoder W from the descriptions of the embodiments so far, redundant explanations will not be repeated here.

[0203] In relation to the differences between the codebook for 1-layer CSI reporting and the codebook for 2-layer CSI reporting, the following supplementary information for the seventh embodiment is provided.

[0204] Figures 18A and 18B show the existing Rel.15 / 16 NR, P CSI-RSThis figure shows an example of a codebook for 2-layer CSI reporting using individual antenna ports. The codebook in Figure 18A corresponds to codebook mode = 1. The PMI value for 2-layer CSI reporting is i 1,1 i 1,2 And not only i2, but i 1,3 It is also based on i. 1,1 i 1,2 i2 and i 1,3 This corresponds to precoder W. 1,3 These may be related to O1, O2, N1, N2, etc., and may be obtained based on the correspondence shown in Figure 18B.

[0205] Figures 19A and 19B show the existing Rel.15 / 16 NR, P CSI-RS This figure shows an example of a codebook for 2-layer CSI reporting using individual antenna ports. The codebook in Figure 19A corresponds to codebook mode = 2 and N2 > 1. The codebook in Figure 19B corresponds to codebook mode = 2 and N2 = 1.

[0206] As an 8-port 1-layer FC precoder of the seventh embodiment, the number of CSI-RS antenna ports (P) in the existing Rel.15 / 16 NR CSI-RS Precoder W of the DL Type I single panel codebook for )=8 (more precisely, W in Figures 18A, 19A and 19B) l,l’,m,m’,n (2) If ) is used, the specification for the 8-port 1-layer FC precoder is i 1,1 i 1,2、 i2 and i 1,3 (Or equivalent variables) may be used.

[0207] i for 8 Sending UL Codebook 1,3 The possible values ​​are i for existing Rel.15 / 16 DL. 1,3 The range of possible values ​​may be narrower than the maximum value of the candidate values ​​(the maximum value of the candidate values ​​may be small). In this case, a reduction in the number of precoders and the overhead associated with DCI's TPMI notification can be expected.

[0208] Note that i for the 8 Transmit UL Codebook 1,3 The possible values ​​are i for existing Rel.15 / 16 DL. 1,3 The range of possible values ​​may be wider than the maximum value of the candidate (the maximum value of the candidate may be larger).

[0209] Furthermore, the 8-port 2-layer FC precoder may be scaled (adjusted) so that the coefficients (or the absolute value of each component) are 1 / √8 (or a specific value).

[0210] According to the seventh embodiment described above, the UE can appropriately utilize the 8-port 2-layer FC precoder.

[0211] <Eighth Embodiment> The eighth embodiment relates to an 8-port m-layer NC / PC / FC precoder (where m is an integer m > 2).

[0212] The eighth embodiment corresponds to an embodiment in which the method for determining / selecting an 8-port 1 or 2-layer NC / PC / FC precoder described in the embodiments so far is applied to / interpreted as an 8-port m-layer NC / PC / FC precoder. Those skilled in the art will be able to understand the content of the eighth embodiment from the descriptions of the embodiments so far, so redundant explanations will not be repeated here.

[0213] The following is a supplement to the eighth embodiment.

[0214] An 8-port m-layer NC precoder may correspond to a matrix formed by combining m 1-port selection vectors according to a specific rule. An 8-port m-layer NC precoder may also correspond to a matrix containing each column vector, created by inserting four zeros evenly into each column of an existing 4-port NC precoder (e.g., a 4-port m-layer NC precoder).

[0215] An 8-port m-layer PC precoder may correspond to a matrix obtained by combining m x-port selection vectors (for example, x=2, 4, 6) according to a specific rule. An 8-port m-layer PC precoder may correspond to a matrix including respective column vectors obtained by uniformly inserting four zeros per column into an existing 4-port PC / FC precoder (for example, a 4-port m-layer PC / FC precoder).

[0216] An 8-port m-layer FC precoder may correspond to a precoder included in an existing 8-port codebook for DL (for example, a codebook for CSI reporting). An 8-port m-layer FC precoder is based on codebook mode, N1, N2, O1, O2, i 1,1 , i 1,2、 candidate values of i2, i 1,3 may be determined in accordance with constraints / configurations related to candidate values of the same.

[0217] According to the eighth embodiment described above, a UE can appropriately use an 8-port m-layer NC / PC / FC precoder (where m is an integer greater than 2).

[0218] <Supplementary Note> Note that at least one of the above-described embodiments may be applied only to a UE that has reported a specific UE capability or supports the specific UE capability.

[0219] The specific UE capability may indicate at least one of the following: supporting processing / operation / control / information related to at least one of the above embodiments, supporting PUSCH transmission using more than 4 antenna ports, supporting 8-port m-layer NC / PC / FC precoders (m=1, 2, ...).

[0220] Furthermore, the specific UE capability described above may be a capability that applies across all frequencies (commonly regardless of frequency), a capability per frequency (e.g., cell, band, BWP), a capability per frequency range (e.g., FR1, FR2, FR3, FR4, FR5), or a capability per subcarrier interval.

[0221] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0222] Furthermore, at least one of the embodiments described above may be applied when the UE is configured with specific information related to the embodiments described above by upper-layer signaling. For example, such specific information may be configuration information for a PUSCH using more than four antenna ports, or arbitrary RRC parameters for a particular release (e.g., Rel.18).

[0223] If the UE does not support at least one of the above-mentioned specific UE capabilities or does not have the above-mentioned specific information configured, the behavior of, for example, Rel.15 / 16 may be applied.

[0224] (Wireless communication system) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any or a combination thereof of the wireless communication methods according to the above embodiments of this disclosure.

[0225] Figure 20 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that implements communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0226] In addition, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (multi-RAT dual connectivity (Multi-RAT Dual Connectivity (MR-DC))). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0227] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In NE-DC, an NR base station (gNB) is the MN, and an LTE (E-UTRA) base station (eNB) is the SN.

[0228] The wireless communication system 1 may support dual connectivity between a plurality of base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0229] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0230] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of Carrier Aggregation (CA) using multiple Component Carriers (CC) and Dual Connectivity (DC).

[0231] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may fall in a frequency band higher than FR2.

[0232] Furthermore, the user terminal 20 may communicate using at least one of the following methods at each CC: Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0233] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, if NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0234] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0235] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0236] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0237] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0238] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, shared by each user terminal 20.

[0239] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0240] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0241] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0242] Furthermore, the DCI that schedules PDSCH may be called a DL assignment or DL ​​DCI, and the DCI that schedules PUSCH may be called a UL grant or UL DCI. Furthermore, PDSCH may be interpreted as DL data, and PUSCH may be interpreted as UL data.

[0243] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with a particular search space based on the search space configuration.

[0244] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0245] PUCCH may transmit uplink control information (UCI) which includes at least one of the following: channel state information (CSI), delivery acknowledgment (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0246] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted from the names of various channels.

[0247] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc., may be transmitted.

[0248] The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that SS, SSB, and the like may also be referred to as reference signals.

[0249] Furthermore, in the radio communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a sounding reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), or the like may be transmitted. Note that the DMRS may also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0250] (Base Station) FIG. 21 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmission / reception section 120, a transmission / reception antenna 130, and a transmission line interface 140. Note that one or more of the control section 110, the transmission / reception section 120, the transmission / reception antenna 130, and the transmission line interface 140 may be provided, respectively.

[0251] Note that in this example, functional blocks of characteristic portions in the present embodiment are mainly illustrated, and it may be assumed that the base station 10 also includes other functional blocks necessary for radio communication. A part of the processing of each unit described below may be omitted.

[0252] The control section 110 performs control of the entire base station 10. The control section 110 can be configured from a controller, a control circuit, or the like described based on common general knowledge in the technical field according to the present disclosure.

[0253] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of radio resources, etc.

[0254] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0255] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0256] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0257] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0258] The transmitting / receiving unit 120 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0259] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., to generate a bit sequence to be transmitted.

[0260] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0261] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0262] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0263] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing to the acquired baseband signal, such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0264] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception 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 may be output to the control unit 110.

[0265] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0266] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0267] The transmitting / receiving unit 120 may also transmit to the user terminal 20 information regarding a codebook for transmitting a certain number of layers using more than four antenna ports.

[0268] The transmitting / receiving unit 120 may receive an uplink transmission (e.g., PUSCH) transmitted from the user terminal 20 based on a precoder determined based on the codebook.

[0269] (User terminal) Figure 22 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0270] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0271] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0272] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0273] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0274] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0275] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0276] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0277] The transmitting / receiving unit 220 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0278] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210, etc., to generate a bit sequence to be transmitted.

[0279] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0280] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0281] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0282] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0283] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0284] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0285] In this disclosure, the transmitting and receiving units of the user terminal 20 may consist of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0286] The control unit 210 may determine the precoder based on a codebook for transmitting a certain number of layers using more than four antenna ports.

[0287] The transmitting / receiving unit 220 may perform uplink transmission based on the precoder.

[0288] The codebook may include at least one of a non-coherent precoder, a partially coherent precoder, and a fully coherent precoder.

[0289] (Hardware configuration) The block diagrams used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0290] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0291] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 23 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0292] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0293] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, processing may be performed by one processor, or by two or more processors simultaneously, sequentially, or by other means. Note that processor 1001 may be implemented using one or more chips.

[0294] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or to control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0295] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0296] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0297] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be called a register, cache, or main memory. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of this disclosure.

[0298] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital multipurpose disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be called an auxiliary storage device.

[0299] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated implementations of a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0300] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0301] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0302] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0303] (modified version) In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0304] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0305] Here, the neuralelogy may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neuralelogy may be, for example, 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 configuration, specific filtering processes performed by the transceiver in the frequency domain, or specific windowing processes performed by the transceiver in the time domain.

[0306] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0307] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0308] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0309] For example, one subframe may be called TTI, multiple consecutive subframes may be called TTI, or one slot or one mini-slot may be called TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Note that the unit representing TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0310] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0311] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0312] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0313] A TTI with a time length of 1 ms may also be called a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, or a slot. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, or a slot.

[0314] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0315] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0316] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0317] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0318] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0319] A Bandwidth Part (BWP) (also called a partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a BWP.

[0320] A BWP may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured within a single carrier for a UE.

[0321] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0322] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative examples. For instance, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots within a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0323] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0324] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements that use these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0325] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0326] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0327] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0328] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof).

[0329] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Element (CE).

[0330] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not providing notification of the specified information or by providing notification of other information).

[0331] The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0332] Software should be broadly interpreted to mean 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, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0333] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0334] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0335] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "quasi-co-location (QCL)," "transmission configuration indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," and "panel" may be used interchangeably.

[0336] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0337] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0338] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0339] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0340] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0341] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0342] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0343] Figure 24 shows 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 rotation speed sensor 51, a pneumatic 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.

[0344] The drive unit 41 consists of, for example, at least one of an engine, a motor, or an engine-motor hybrid. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0345] The electronic control unit 49 consists of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 installed in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0346] Signals from various sensors 50-58 include current signals from current sensor 50 for sensing motor current, rotational speed signals of front wheels 46 / rear wheels 47 acquired by rotational speed sensor 51, air pressure signals of front wheels 46 / rear wheels 47 acquired by air pressure sensor 52, vehicle speed signals acquired by vehicle speed sensor 53, acceleration signals acquired by acceleration sensor 54, accelerator pedal depression signal of accelerator pedal 43 acquired by accelerator pedal sensor 55, brake pedal depression signal of brake pedal 44 acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals for detecting obstacles, vehicles, pedestrians, etc., acquired by object detection sensor 58.

[0347] The information service unit 59 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, displays, television, and radio, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via a communication module 60 or the like to provide various types of information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0348] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0349] The driver assistance system unit 64 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0350] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[0351] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

[0352] The communication module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above input.

[0353] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit, which outputs information (for example, it outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0354] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0355] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel and downlink channel may be interpreted as sidelink channel.

[0356] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0357] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes with base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0358] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order and are not limited to that specific order.

[0359] Each aspect / embodiment described in this disclosure includes 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 decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), and IEEE This may apply to systems utilizing 802.20, Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, as well as next-generation systems that are extended, modified, created, or defined based on these. It may also apply to combinations of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0360] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0361] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

[0362] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to include judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0363] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0364] Furthermore, "judgment (decision)" can be considered as "judging (deciding)" something like resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" can be considered as "judging (deciding)" something about an action.

[0365] Furthermore, "judgment (decision)" can be replaced with "assuming," "expecting," or "considering."

[0366] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0367] In this disclosure, when two elements are connected, they can be considered to be “connected” or “coupled” to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, or optical domain (both visible and invisible).

[0368] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0369] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0370] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0371] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The invention described herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined in the claims. Therefore, the descriptions herein are for illustrative purposes only and do not imply any limitation on the invention described herein.

Claims

1. A control unit that determines a precoder based on an 8-transmit UL codebook for up to 8 layers of uplink (UL) transmission using 8 antenna ports, It has a transmitting unit that performs UL transmission of up to 8 layers based on the aforementioned precoder, When a first antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the first antenna layout, and when a second antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the second antenna layout. The transmitting unit transmits capability information indicating that it supports at least one of the full coherent codebook for the first antenna layout and the full coherent codebook for the second antenna layout.

2. The terminal according to claim 1, wherein, if the eight transmitting UL codebooks are noncoherent codebooks, the noncoherent codebooks include eight different eight-port, one-layer noncoherent precoders.

3. The terminal according to claim 1, wherein, if the 8-transmit UL codebook is a non-coherent codebook, the non-coherent codebook includes at least one 8-port m-layer non-coherent precoder, which combines m one-port selection vectors for a certain number of layers m.

4. The step of transmitting capability information indicating support for at least one of: a fully coherent codebook for a first antenna layout for up to eight layers of uplink (UL) transmission using eight antenna ports; and a fully coherent codebook for a second antenna layout for up to eight layers of UL transmission using eight antenna ports; The steps include determining the precoder based on an 8-transmission UL codebook for UL transmission of up to 8 layers using 8 antenna ports, and The step includes performing UL transmission of up to 8 layers based on the aforementioned precoder, A wireless communication method for a terminal, wherein when the first antenna layout is set by upper-layer signaling, the 8 transmitting UL codebook is a fully coherent codebook for the first antenna layout, and when the second antenna layout is set by upper-layer signaling, the 8 transmitting UL codebook is a fully coherent codebook for the second antenna layout.

5. A transmitting unit that transmits to a terminal information relating to an 8-transmit UL codebook for up to 8 layers of uplink (UL) transmission using 8 antenna ports, The system includes a receiving unit that receives UL transmissions of up to 8 layers transmitted based on a precoder determined based on the aforementioned 8-transmission UL codebook, When a first antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the first antenna layout, and when a second antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the second antenna layout. The receiving unit receives capability information indicating that it supports at least one of the full coherent codebook for the first antenna layout and the full coherent codebook for the second antenna layout, and is a base station.

6. A system having terminals and base stations, The aforementioned terminal is A control unit that determines a precoder based on an 8-transmit UL codebook for up to 8 layers of uplink (UL) transmission using 8 antenna ports, It has a transmitting unit that performs UL transmission of up to 8 layers based on the aforementioned precoder, When a first antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the first antenna layout, and when a second antenna layout for up to eight layers of UL transmission using eight antenna ports is configured by upper-layer signaling, the eight-transmission UL codebook is a fully coherent codebook for the second antenna layout. The transmitting unit transmits capability information indicating that it supports at least one of the full coherent codebook for the first antenna layout and the full coherent codebook for the second antenna layout. The aforementioned base station is A system having a receiving unit that receives UL transmissions of up to eight layers.

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