Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives first configuration information pertaining to precoding implemented on a subband-by-subband basis for uplink (UL) transmission, second configuration information pertaining to multiple transmission / reception point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields; and a control unit that determines one or more subband precoders for specific UL transmission on the basis of the one or more specific fields. Said one aspect of the present disclosure makes it possible to appropriately control UL transmission.

Description

Terminal, wireless communication method, and base station

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) was specified with the aim of achieving even higher data rates and lower latency (Non-Patent Literature 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP®) Release (Rel.) 8, 9).

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

[0004] 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

[0005] Since Rel. 18, UL subband precoding (which may also be called frequency-selective precoding) has been considered. However, the various regulations for implementing UL subband precoding are still not sufficiently clear. Without clear regulations for UL subband precoding, there is a risk that UL transmissions using UL subband precoding cannot be properly controlled.

[0006] Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control UL transmission.

[0007] A terminal according to one aspect of the present disclosure is characterized by having a receiving unit that receives first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields, and a control unit that determines one or more subband precoders for specific UL transmission based on the one or more specific fields.

[0008] According to one aspect of this disclosure, UL transmission can be appropriately controlled.

[0009] 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 shows an example of a precoding matrix table W for two-layer (rank 2) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 3 shows an example of a precoding matrix table W for three-layer (rank 3) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 4 shows an example of a precoding matrix table W for four-layer (rank 4) transmission using four antenna ports when the transform precoder is disabled in Rel. 16 NR. Figure 5A shows an example of a precoding matrix table W for single-layer (rank 1) transmission using two antenna ports in Rel. 16 NR. Figure 5B shows an example of a precoding matrix table W for four-layer (rank 4) transmission using four antenna ports when the transform precoder is disabled in Rel. Figure 16 shows an example of a table of precoding matrices W for 2-layer (rank 2) transmission using 2 antenna ports when transform precoding is disabled. Figure 6 shows an example of the correspondence between the field values ​​of precoding information and the number of layers, and the number of layers and TPMI in Rel. 16 NR. Figures 7A to 7C show the SRI instruction or second SRI instruction during codebook-based PUSCH transmission in Rel. 17. Figure 8 shows an example of an antenna layout for 8 antenna ports. Figures 9A and 9B show an example of frequency-selective precoding. Figure 10 shows an example of the correspondence between bandwidth size and RGB size (e.g., reference value). Figure 11 shows another example of frequency-selective precoding. Figure 12 shows an example of the functions relating to the precoder instruction of this disclosure. Figure 13 shows an example of simultaneous setting of UL subband precoding and multi-TRP UL transmission. Figure 14 shows an example of simultaneous configuration of UL subband precoding and UL full-power transmission. Figure 15 shows an example of precoder determination method 1. Figure 16 shows an example of precoder determination method 2.Figure 17 shows an example of precoder determination method 2. Figure 18 shows an example of precoder determination method 3. Figure 19 shows an example of precoder determination method 3. Figure 20 shows an example of a schematic configuration of a wireless communication system according to one embodiment. Figure 21 shows an example of a base station configuration according to one embodiment. Figure 22 shows an example of a user terminal configuration according to one embodiment. Figure 23 shows an example of the hardware configuration of a base station and user terminal according to one embodiment. Figure 24 shows an example of a vehicle according to one embodiment.

[0010] (Control of SRS and PUSCH transmission) In Rel. 15 NR, a terminal (user terminal, User Equipment (UE)) may receive information used for transmitting a measurement reference signal (e.g., a Sounding Reference Signal (SRS)) (SRS configuration information, e.g., parameters in "SRS-Config" of the RRC control element).

[0011] 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).

[0012] 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.

[0013] SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of the SRS.

[0014] 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 transmit P-SRS and SP-SRS periodically (or periodically after activation), and A-SRS based on DCI's SRS requests.

[0015] 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. The 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.

[0016] 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.

[0017] 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.

[0018] The spatial relation information of the SRS (for example, the "spatialRelationInfo" of the RRC information element) may indicate spatial relation 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).

[0019] The spatial relationship information of the SRS may include at least one of the following as an index for the predetermined reference signal: an SSB index, a CSI-RS resource ID, and an SRS resource ID.

[0020] 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.

[0021] The spatial relationship information of the SRS may include a serving cell index, a BWP index (BWP ID), etc., corresponding to the predetermined reference signal mentioned above.

[0022] If a UE sets spatial relationship information regarding an SRS resource with respect to an SSB or CSI-RS, 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.

[0023] If a UE sets up spatial relationship information regarding a certain SRS (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 spatial domain filter (spatial domain transmit filter) used for transmitting the reference SRS. In other words, in this case, the UE may assume that the UE transmit beam of the reference SRS and the UE transmit beam of the target SRS are the same.

[0024] 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.

[0025] In Rel. 15 / 16 NR, when using codebook-based transmission for PUSCH, the UE may have up to two SRS resources, with the SRS resource set in the codebook configured by the RRC, and one of the up to two SRS resources indicated by the DCI (1-bit SRI field). The transmit beam of PUSCH will be specified by the SRI field.

[0026] The UE may determine the TPMI and layer count (transmission rank) for PUSCH based on the precoding information and layer count 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 count, etc.

[0027] 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 by the RRC, and one or more of these up to four SRS resources may be indicated by the DCI (2-bit SRI field).

[0028] 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 of the above SRS resource.

[0029] 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 (or its measurement). Otherwise, the PUSCH transmit beam may be specified by the SRI.

[0030] Furthermore, the UE may be configured to use either codebook-based or non-codebook-based PUSCH transmission via a higher-layer parameter "txConfig" that indicates the transmission scheme. This parameter may indicate a value of "codebook" or "noncodebook".

[0031] In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may mean PUSCH when the UE is set to “codebook” as the transmission scheme. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may mean PUSCH when the UE is set to “non-codebook” as the transmission scheme.

[0032] (Determination of the PUSCH precoder in codebook (CB) based transmission) As described above, in the case of codebook (CB) based transmission, the UE may determine the precoder for PUSCH transmission based on SRI, TRI, TPMI, etc.

[0033] SRI, TRI, TPMI, etc., may be notified to the UE using Downlink Control Information (DCI). The 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.

[0034] 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."

[0035] The UE may report UE capability information regarding the precoder type, and the precoder type based on the UE capability information may be set by upper layer signaling from the base station. The UE capability information may be information on the precoder type used by the UE in PUSCH transmission (for example, it may be represented by the RRC parameter "pusch-TransCoherence").

[0036] The UE may determine the precoder to be used for PUSCH transmission based on the precoder type information (for example, the RRC parameter "codebookSubset") included in the PUSCH configuration information (for example, the "PUSCH-Config" information element of RRC signaling) notified by upper layer signaling. The UE may set a subset of the PMI specified by the TPMI by the codebookSubset.

[0037] Note that the precoder type may be specified by any one of full coherent (fully coherent), partial coherent, and non coherent, or a combination of at least two of these (for example, it may be represented by parameters such as "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", etc.).

[0038] For example, the RRC parameter "pusch-TransCoherence" indicating the UE capability may indicate full coherence, partial coherence, or non-coherence. Also, the RRC parameter "codebookSubset" may indicate "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent".

[0039] Full coherence may mean that all antenna ports used for transmission are synchronized (it may be expressed as being able to align the phases, being able to perform phase control for each coherent antenna port, being able to appropriately apply a precoder for each coherent antenna port, etc.). Partial coherence may mean that some of the antenna ports used for transmission are synchronized, but the some ports and other ports are not synchronized. Non-coherence may mean that each antenna port used for transmission cannot be synchronized.

[0040] Note that a UE supporting a full coherence precoder type may be assumed to support partial coherence and non-coherence precoder types. A UE supporting a partial coherence precoder type may be assumed to support a non-coherence precoder type.

[0041] In the present disclosure, precoder type, coherence, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc. may be read interchangeably with each other.

[0042] The UE may determine from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmissions a precoding matrix corresponding to the TPMI index obtained from the DCI (e.g., DCI format 0_1; hereafter the same) for scheduling UL transmissions.

[0043] Figure 1 shows an example of the association between a codebook subset and the TPMI index. Figure 1 corresponds to a 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).

[0044] The correspondence between the TPMI index and the corresponding W, as shown in Figure 1 (which may also be called a table), is also called a codebook. A portion of this codebook is also called a codebook subset.

[0045] In Figure 1, if the codebook subset is fully, partially, and noncoherent, the UE is notified of a TPMI (TPMI index) from 0 to 27 for a single-layer transmission. If the codebook subset is partially and noncoherent, the UE is set to a TPMI from 0 to 11 for a single-layer transmission. If the codebook subset is noncoherent, the UE is set to a TPMI from 0 to 3 for a single-layer transmission.

[0046] In Figure 1, when TPMIs from 0 to 3 are notified, a non-coherent precoder is applied. When TPMIs from 4 to 11 are notified, a partially coherent precoder is applied. When TPMIs from 12 to 27 are notified, a fully coherent precoder is applied.

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

[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 (codebook subset is partial and noncoherent), or 0 to 5 (codebook subset is noncoherent).

[0049] According to Figure 3, the TPMI notified to the UE for a 3-layer transmission is between 0 and 6 (codebook subset is complete, partial, and noncoherent), between 0 and 2 (codebook subset is partial and noncoherent), or 0 (codebook subset is noncoherent).

[0050] According to Figure 4, the TPMI notified to the UE for a 4-layer transmission is between 0 and 4 (codebook subset is complete, partial, and noncoherent), between 0 and 2 (codebook subset is partial and noncoherent), or 0 (codebook subset is noncoherent).

[0051] Figure 5A corresponds to the table of precoding matrices W for single-layer (rank 1) transmission using two antenna ports in Rel. 16 NR. Figure 5B corresponds to the table of precoding matrices W for two-layer (rank 2) transmission using two antenna ports in Rel. 16 NR when transform precoding is disabled.

[0052] According to Figure 5A, the TPMI that the UE is notified of for a 2-port single-layer transmission is between 0 and 5 (with a complete, partial, and non-coherent codebook subset) or between 0 and 1 (with a non-coherent codebook subset). If the notified TPMI is between 0 and 1, a non-coherent precoder is applied. If the notified TPMI is between 2 and 5, a fully coherent precoder is applied.

[0053] According to Figure 5B, the TPMI that the UE is notified of for a 2-port 2-layer transmission is between 0 and 2 (codebook subset is complete, partial, and non-coherent) or 0 (codebook subset is non-coherent).

[0054] 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.

[0055] 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. In this disclosure, codebook, codebook subset, and precoder may be interpreted interchangeably.

[0056] 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, where a UE with a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") is set, excluding the codebooks corresponding to TPMIs specified by a UE with a noncoherent codebook subset (e.g., RRC parameter "codebookSubset" = "nonCoherent") (i.e., for single-layer transmission with four antenna ports, the codebooks for TPMIs 4 through 11).

[0057] 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 a TPMI specified by a UE that corresponds to a partially coherent codebook subset (e.g., RRC parameter "codebookSubset" = "partialAndNonCoherent") (i.e., for single-layer transmission with four antenna ports, the codebooks for TPMI = 12 to 27).

[0058] As can be seen from Figures 5A and 5B, there is no partially coherent precoder for two-antenna port transmission, so the setting that the codebook subset is partial and non-coherent does not need to be applied to two-antenna ports.

[0059] (Precoding Information Field) As described above, the UE may determine the TPMI and layer number (transmission rank) for the PUSCH based on the precoding information field of the DCI (e.g., DCI format 0_1 / 0_2) that schedules the PUSCH.

[0060] With respect to 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.

[0061] Figure 6 shows an example of the correspondence between the field values ​​of precoding information and layer number, and the layer number and TPMI in Rel. 16 NR. 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 ​​of precoding information and layer number.

[0062] In Figure 6, the precoding information field is 6 bits when a fully coherent (fullyAndPartialAndNonCoherent) codebook subset is set for the UE, 5 bits when a partially coherent (partialAndNonCoherent) codebook subset is set, and 4 bits when a nonCoherent (nonCoherent) codebook subset is set.

[0063] As shown in Figure 6, 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 6, the number of layers and TPMI indicated by the precoding information field values ​​= 0-11 may be the same for fully coherent (fullyAndPartialAndNonCoherent), partially coherent (partialAndNonCoherent), and noncoherent codebook subsets. Also, in Figure 6, the number of layers and TPMI indicated by the precoding information field values ​​= 0-31 may be the same for fully coherent (fullyAndPartialAndNonCoherent) and partially coherent (partialAndNonCoherent) codebook subsets.

[0064] Furthermore, the precoding information field may be 0 bits for non-codebook-based PUSCH. Also, the precoding information field may be 0 bits for codebook-based PUSCH with one antenna port.

[0065] (SRS settings for Codebook-based PUCH) Figure 7A shows the cases in Rel. 17 where ul-FullPowerTransmission is not set, or ul-FullPowerTransmission=fullpowerMode1, or ul-FullPowerTransmission=fullpowerMode2, or ul-FullPowerTransmission=fullpower and N SRS This figure shows the SRI instruction or second SRI instruction during codebook-based PUSCH transmission when =2. Figure 7B shows ul-FullPowerTransmission=fullpowerMode2 and N in Rel. 17. SRSThis figure shows the SRI instruction or second SRI instruction for codebook-based PUSCH transmission when =3. Figure 7C shows ul-FullPowerTransmission=fullpowerMode2 and N in Rel. 17. SRS When = 4, the figure shows an SRI instruction or a second SRI instruction for codebook-based PUSCH transmission.

[0066] The SRI indication corresponds to the DCI's SRS resource indicator field, and the Second SRI indication corresponds to the DCI's Second SRS resource indicator field. The SRS resource set indicator field is 2 bits if txConfig=nonCodeBook and there are two SRS resource sets associated with the "nonCodeBook" use, set by srs-ResourceSetToAddModList, or if txConfig=codebook and there are two SRS resource sets associated with the "codebook" use, set by srs-ResourceSetToAddModList. Otherwise, the SRS resource set indicator field is 0 bits.

[0067] The SRS resource indicator field, when the upper layer parameter txConfig = codebook, follows Figure 7A-7C, [log2(N SRS )] is a bit. N SRS This is the number of configured SRS resources in the SRS resource set, indicated by the SRS resource set indicator field (if it exists). Otherwise, N SRS This is the number of configured SRS resources associated with the usage of the higher-level parameter 'codeBook' within the SRS resource set configured by the higher-level parameter srs-ResourceSetToAddModList.

[0068] In codebook-based transmissions, PUSCH is scheduled or semi-fixed according to DCI format 0_0, DCI format 0_1, and DCI format 0_2. One or two SRS resource sets can be configured in SRS-ResourceSetToAddModList, which has the upper layer parameter usage "codebook" for SRS-ResourceSet. Alternatively, one or two SRS resource sets can be configured in srs-ResourceSetToAddModListDCI-0-2, which has the upper layer parameter usage "codebook" for SRS-ResourceSet.

[0069] In srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, when setting two SRS resource sets by setting the usage of the higher-layer parameter of SRS-ResourceSet to "codebook", one or two SRIs and one or two TPMIs are provided by two SRS resource instruction fields and two precoding information fields, respectively.

[0070] The UE applies the specified SRI(s) and TPMI(s) to one or more PUSCH repetitions according to the associated SRS resource set of the PUSCH repetitions. If two SRS resource sets are configured with SRS-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, and the use of the higher-layer parameter of SRS-ResourceSet is set to "codebook", the UE does not expect a different number of SRS resources to be configured in the two SRS resource sets.

[0071] In codebook-based transmissions, only one SRS resource may be specified from the SRS resource set based on the SRI. The maximum number of configured SRS resources for codebook-based transmissions is two, unless the upper-layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2". If aperiodic SRS is configured for the UE, the SRS request field in the DCI triggers the transmission of the aperiodic SRS resource.

[0072] Unless the upper layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", if multiple SRS resources are set to "codebook" by an SRS-ResourceSet, the UE expects the upper layer parameter "nrofSRS-Port" of the SRS-Resource within the SRS-ResourceSet to be set to the same value for all of these SRS resources.

[0073] When the upper layer parameter "ul-FullPowerTransmission" is set to "fullpowerMode2", the following (1) to (3) apply: (1) A UE can configure one SRS resource or multiple SRS resources with the same or different number of SRS ports within an SRS resource set whose use is set to "codebook". (2) If multiple SRS resources are configured within an SRS resource set, up to two different spatial relationships can be configured for all SRS resources within the SRS resource set whose use is set to "codebook". (3) Depending on the capabilities of the UE, up to two or four SRS resources are supported in an SRS resource set whose use is set to "codebook".

[0074] In a normal codebook-based PUSCH, one SRS resource set can be configured, each containing two SRS resources with the same number of ports. In the case of a codebook-based PUSCH iteration (for a multi-transmission / reception point (TRP)), two SRS resource sets, each containing the same number of SRS resources, may be configured. In the case of "fullpowerMode2" in the codebook-based configuration, one SRS resource set can be configured, containing SRS resources with the same or different number of ports.

[0075] (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.

[0076] Figure 8 shows an example of an antenna layout for an 8-antenna port. Ng is the number of antenna groups. M is the number of antennas (or antenna elements) in the first dimension, and N is the number of antennas (or antenna elements) in the second dimension. The first and second dimensions are, for example, the horizontal and vertical directions. P is the number of polarization planes. When P = 2, it becomes a cross-polarized antenna.

[0077] An antenna group may also be called a coherent group. A coherent group may contain one or more coherent ports. For example, a partially coherent UE may have multiple coherent groups. Antenna ports within a coherent group may be coherent. Antenna ports between different coherent groups may not be coherent.

[0078] Each coherent group may correspond to a different transmit panel / transmit chain (Tx chain) / SRS resource set / RS resource set / spatial relation info / joint Transmission Configuration Indication state (joint TCI state) / UL TCI state / received TRP. Here, the SRS resource set may specifically correspond to an SRS resource set used in a codebook or non-codebook. Furthermore, each coherent group may correspond to a different received TRP. Coherent groups may also be called coherent antenna groups, port groups, antenna sets, etc.

[0079] The UE may report supported antenna groups, antenna placement information, and coherence count as UE capability information. The UE may also configure coherence groups (e.g., the number of coherence groups, the number of ports included in each coherence group) through upper-layer signaling.

[0080] Note that the antenna layout is not limited to the example shown in Figure 8. For example, the number of panels on which 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 example in Figure 8. dG-H and dG-V represent the horizontal and vertical spacing between the centers of adjacent antenna groups, respectively.

[0081] Furthermore, while Rel. 15 / 16 NR supported the transmission of one codeword (CW) per pusher, for Rel. 18 NR, it is being considered that UEs will transmit more than one CW per pusher. For example, support for two CW transmissions for ranks 5-8 and two CW transmissions for ranks 2-8 are being considered.

[0082] Furthermore, in UEs of Rel. 15 and Rel. 16, it is assumed that only one beam / panel is used for UL transmission at any given time. However, in Rel. 17 and later, in order to improve UL throughput and reliability, simultaneous UL transmission of multiple beams / panels (e.g., PUSCH transmission) is being considered for one or more TRPs. 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.

[0083] Furthermore, precoding matrices for UL transmission using more than four antenna ports are being considered. For example, a codebook for 8-port transmission (which may also be called an 8-transmission UL codebook) is being considered.

[0084] (UL Subband Precoding) In Rel. 18 NR and later, when performing UL transmission (e.g., PUSCH transmission), it is expected that UL subband precoding (or frequency selective precoding) which applies multiple precodings in the frequency domain will be supported. Frequency selective precoding may also be interpreted as subband precoding, separate precoding, frequency group precoding, or frequency directional precoding.

[0085] In other words, it is assumed that the application of precoding is controlled based on a predetermined frequency unit. The frequency domain may be interpreted as the frequency domain or frequency direction. The frequency unit may be interpreted as a frequency resource unit, subband unit, frequency subunit unit, or bandwidth unit.

[0086] In this case, the issue becomes how to configure / instruct the subband precoding (e.g., precoding PMI) of a CB-based PUSCH.

[0087] Therefore, it is necessary to clarify the details of the operation that controls the application of precoding based on a predetermined frequency unit.

[0088] <Conditions for Frequency Selective Precoding> This section describes the conditions, rules, and parameters for precoding control in the frequency direction when frequency selective precoding (e.g., frequency selective precoding) is supported / configured for UL transmissions such as PUSCH.

[0089] If frequency-selective precoding is supported / configured, at least one of the following options 1-1 to 1-3 may be applied as a condition / rule / parameter for precoding control in the frequency direction.

[0090] The following options may apply to CB-based transmissions to a push of one or more (e.g., two) CW / TBs. If there are multiple (e.g., two) CW / TBs, the same configuration may be applied to the two CW / TBs, or different configurations may be applied.

[0091] [Option 1-1] The granularity (or level) of frequency-selective precoding for UL transmission may be defined / set. The granularity of precoding may be at least one of a predetermined subcarrier unit, a predetermined resource block (RB) unit, a predetermined physical resource block (PRB) unit, a predetermined resource block group (RBG) unit, a predetermined subband unit, or a precoding resource block group (PRG) unit.

[0092] The granularity of the precoding to be applied may be defined in the specification or set in the UE by higher-level layer parameters. Furthermore, the reference value (e.g., X) for applying a certain granularity may also be defined in the specification or set by higher-level layer parameters. For example, if an RGB unit (reference value (X)) is set, precoding may be applied separately to each of the X RGBs. The reference value X may be determined based on UE capability (e.g., UE capability).

[0093] Figure 9A shows an example where the granularity of precoding is set to RGB units (here, 4 RBG (reference value 4)). In this case, precoding may be applied / set separately for every 4 RBG during PUSCH transmission.

[0094] <Aspect 1-1> The granularity of subband precoding may be defined in the specification for predetermined conditions / parameters. The predetermined conditions / parameters may be at least one of a certain bandwidth (BW), subcarrier spacing (SCS), total number of PRBs, bandwidth (BW) scheduled by DCI, and frequency range (FR).

[0095] The association between the granularity (or reference value) of subband precoding and predetermined conditions / parameters may be defined using a new table or an existing table. For example, a table relating the RGB size (or reference value) to the size of the bandwidth portion may be reused to define the association between the granularity of subband precoding and each parameter (see Figure 10).

[0096] Figure 10 shows an example of the correspondence between bandwidth size and RGB size. Multiple settings (cases) may be defined for the correspondence between bandwidth size and RGB size. The base station may notify the UE of which setting to use via higher-layer signaling or the like.

[0097] <Aspect 1-2> The granularity / reference value of frequency selection precoding (or subband precoding) may be set / instructed to the UE based on at least one of RRC, MAC CE, and DCI. For example, candidate granularity / reference values ​​corresponding to predetermined conditions / parameters (e.g., candidate granularity) may be defined in advance in the specifications or set by higher layer parameters, and the specific granularity / reference value to be applied may be instructed to the UE by MAC CE / DCI, etc.

[0098] In this way, by defining / setting the granularity at which frequency-selective precoding is applied to PUSCH, the UE can appropriately control frequency-selective precoding. Furthermore, by configuring the system to allow changes to the granularity / reference value of frequency-selective precoding, it becomes possible to flexibly control frequency-selective precoding in response to PUSCH transmission.

[0099] [Option 1-2] The number of frequency-selective precodings for UL transmission may be defined / set. The number of frequency-selective precodings (e.g., the number of frequency-selective precodings) may indicate the number of frequency segments to which precodings can be applied separately in the frequency direction, or the number of frequency segments to which different precodings can be applied in the frequency direction.

[0100] The frequency portion may also be called the frequency part. The UE may apply precoding separately to each frequency portion.

[0101] For example, Y frequency segments may be set for separate precoding with respect to a bandwidth of Z (Z BW). The application of separate precodings may be supported for each of the Y frequency segments.

[0102] Figure 9B shows the case where there are two frequency-selective precodings (e.g., frequency segments to which frequency-selective precoding is applied). In this case, it may be supported to apply separate precodings to the two frequency segments within a certain total UL bandwidth or a scheduled bandwidth.

[0103] <Aspect 2-1> The number of frequency-selective precodings (or subband precodings) may be defined for a predetermined condition / parameter. The predetermined condition / parameter may be at least one of a bandwidth (BW), subcarrier spacing (SCS), total number of PRBs, bandwidth (BW) scheduled by DCI, and frequency range (FR).

[0104] The association between the number of frequency selection precodes and predetermined conditions / parameters may be defined using a new table or an existing table.

[0105] <Aspect 2-2> The number of frequency selection precodes may be set / instructed to the UE based on at least one of RRC, MAC CE, and DCI. For example, the number of candidates corresponding to predetermined conditions / parameters (e.g., candidate number) may be defined in advance by the specifications or set by higher-layer parameters, and the specific number to be actually applied may be instructed to the UE by MAC CE / DCI, etc.

[0106] Alternatively, the number of frequency selection precodes may be determined based on predetermined parameters. These predetermined parameters may be, for example, bandwidth or the frequency domain of the scheduled PUSCH.

[0107] By determining the number of frequency selection precodes based on notifications from the base station or predetermined parameters, it becomes possible to flexibly control frequency precoding.

[0108] [Option 1-3] For frequency selection precoding of UL transmission, frequency resources may be defined / set as separate groups (e.g., separate groups). A separate group may consist of at least one of a predetermined number of subcarriers (or predetermined subcarrier levels), a predetermined number of RBs (or predetermined RB levels), a predetermined number of PRBs (or predetermined PRB levels), a predetermined number of RBGs (or predetermined RBG levels), and a predetermined number of subbands (or predetermined subband levels).

[0109] The group ID of a separate group may be indicated as a frequency-selective precoding group. This group ID may be defined by specification for predetermined conditions / parameters at each level (e.g., X subcarrier / RB / PRB / RBG / subband levels) or may be set by higher-layer parameters. The predetermined conditions / parameters may be at least one of a bandwidth (BW), subcarrier spacing (SCS), total number of PRBs, bandwidth (BW) scheduled by DCI, and frequency range (FR).

[0110] Levels indicated by the same group ID may be considered a group of a certain frequency portion and may have the same TPMI indicated (or applied). The group IDs for all levels may be set by RRC / MAC CE / DCI.

[0111] Figure 11 shows an example of applying frequency precoding based on groups (e.g., separate groups). Here, the same precoding is applied to the frequency domain corresponding to the first frequency portion (subband precoding group 00). Similarly, the same precoding is applied to the frequency domains corresponding to the second frequency portion (subband precoding group 01).

[0112] In this way, when performing frequency-selective precoding, grouping the frequency domain makes it possible to flexibly set the frequency portion to which each precoding is applied.

[0113] <Setting Frequency Selection Precoding> This section explains how to set frequency selection precoding for UL transmissions such as PUSCH.

[0114] The application of frequency selection precoding (e.g., enable / disable or activate / deactivate) may be set / indicated based on at least one of RRC, MAC CE, and DCI.

[0115] [DCI] A predetermined field of DCI may be used to dynamically instruct the UE whether or not to apply frequency selection precoding. The predetermined field may be set in a predetermined DCI format (for example, the DCI format used for scheduling PUSCH (e.g., DCI format 0_1 / 0_2)). The predetermined field may be a new field (e.g., 1 bit), or a field from an existing system (e.g., Rel. 17 or earlier) may be used.

[0116] A new field (for example, an instruction field for frequency selection precoding) may be defined and applied as an instruction for each PUSCH scheduled by each DCI. This allows for flexible control over whether or not frequency selection precoding is applied for each PUSCH transmission.

[0117] Alternatively, the new field may be defined and applied to one or more PUSCHs transmitted between the timing indicated by the new field and the new instruction (the next instruction). This allows for a configuration where the new field is set in the DCI only when switching whether or not frequency selection precoding is applied to PUSCH transmissions.

[0118] [RRC / MAC CE] The application of frequency selection precoding can be semi-statically set / instructed to the UE using RRC / MAC CE. In this case, the switching of frequency selection precoding can be controlled quasi-statically.

[0119] <Further consideration of subband precoding> As mentioned above, UL subband precoding (which may also be called frequency-selective precoding) has been considered since Rel. 18.

[0120] The following are examples of performance evaluations of UL subband precoding for different subband counts: • As the number of subbands increases (from 4TX to 8TX), the 50% and 95% UE throughput gains generally increase. For example, with 5 subbands, the 50% UE throughput gain is 2.6% to 4.6%. With 10 subbands, the 50% UE throughput gain is 4.6% to 7.4%. • The performance improvement in the 50% UE throughput gain for 8TX UE is greater than that for 4TX UE.

[0121] The increased DCI overhead required is related to the number of subbands scheduled per UE. For example, with 5 subbands, 88% of UEs are scheduled on one subband and 98% are scheduled on up to two subbands. With 10 subbands, 90% of UEs are scheduled on up to two subbands and 97% are scheduled on up to three subbands.

[0122] As mentioned above, DCIs have been proposed for precoding instructions for each subband (TPMI field for CB, SRI field for NCB) to support UL subband precoding.

[0123] However, precoding instructions for each subband require a TPMI field / SRI field for each subband (PRG), which can result in significant DCI overhead. Therefore, there is a need to reduce DCI overhead while supporting UL subband precoding (achieving a performance improvement equivalent to UL subband precoding).

[0124] <<Subband precoding trigger conditions>>

[0125] The trigger conditions for subband precoding for UL transmission (e.g., PUSCH transmission) may be implemented by higher-layer signaling (e.g., RRC / MAC CE) or physical layer signaling (e.g., DCI).

[0126] Subband precoding for PUSCH may be triggered (configured / instructed) by higher-layer signaling (e.g., RRC / MAC CE) or physical layer signaling (e.g., DCI).

[0127] The following are examples of applicable trigger conditions for subband precoding: • Cyclic prefix OFDM (CP-OFDM) only. • Discrete Fourier transform spread OFDM (DFT-s-OFDM) only. • CP-OFDM + DFT-s-OFDM. • When the UE is not configured for dynamic waveform switching. • When the UE is configured for dynamic waveform switching. • Codebook MIMO (Multi Input Multi Output) only. • Non-codebook MIMO only. • Both codebook MIMO and non-codebook MIMO. • 1TX / 2TX / 4TX codebook MIMO (coherent / partially coherent / non-coherent). • 8TX codebook MIMO (codebook 1 / 2 / 3 / 4). • One or more of 1TX / 2TX / 4TX / 8TX. - PUSCH scheduled / activated by at least one (may be more than one) of DCI formats 0_1 / 0_2 / 0_3. - Dynamic Grant PUSCH (DG-PUSCH) only. - Configured Grant PUSCH (CG-PUSCH) only. - Both DG-PUSCH and CG-PUSCH. - DMRS port for Rel. 15 (without Extended DMRS type configured) / DMRS port for Rel. 18 (with Extended DMRS configured). - Specific rank / layer (e.g., only one layer, or two layers or less).

[0128] The subband precoding for PUSCH transmission described above may be set / instructed, for example, on a precoding resource block group (PRG) basis.

[0129] (Functions / features related to precoders for UL transmission) The following two functions / features are being considered as methods for instructing precoders for UL transmission: • Precoder cycling. • Subband precoding.

[0130] Figure 12 shows an example of the functions relating to precoder instructions in this disclosure.

[0131] Precoder cycling is a more open-loop approach and may be called the first function / feature (function #1 / feature #1) (see Figure 12).

[0132] This method uses subband / PRG and TPMI / SRI indication and may also be called a second function / feature (function #2 / feature #2) (see Figure 12). Subband precoding is a near-closed-loop method that relies on CSI feedback and channel estimation based on SRS measurements.

[0133] Subband precoding may refer to the frequency-selective precoding described above.

[0134] Subband precoding can be further classified as follows (see Figure 12): • Subband TPMI [indication] for codebook-based PUCH (function #2-1). • Subband SRI [indication] for non-codebook-based PUCH (function #2-2).

[0135] In this disclosure, specific functions relating to the precoder [instruction], function #1 / function #2 may be interpreted as mutually interchangeable.

[0136] In this disclosure, Function #1 and Precoder Cycling may be interpreted as interchangeable.

[0137] In this disclosure, Function #2, subband precoding, Function #2-1, subband TPMI [indicator], and Function #2-2, subband SRI [indicator] may be interpreted as mutually interchangeable.

[0138] (Analysis) Several issues have been considered regarding the subband precoding described above.

[0139] <Issue 1> It is necessary to consider whether subband precoding is supported / configured [simultaneously] with multi-TRP UL transmission.

[0140] Multi-TRP UL transmission may also be single DCI-based TDM / SDM / SFN multi-TRP push transmission, multi-DCI push+push transmission, multi-TRP TDM / FDM / SDM repeat transmission, or SDM / SFN multi-panel simultaneous transmission (STxMP).

[0141] The advantages of subband precoding are also considered valid for multi-TRP UL transmission. On the other hand, if subband precoding is supported / configured [simultaneously] with multi-TRP UL transmission, additions / modifications / changes to existing specifications are expected.

[0142] Therefore, it is necessary to clarify whether subband precoding is supported / configured [simultaneously] with multi-TRP UL transmission, and if subband precoding is supported / configured [simultaneously] with multi-TRP UL transmission, how it operates / is controlled.

[0143] <Challenge 2> It is necessary to consider whether subband precoding is supported / configured [simultaneously] with UL full power transmission.

[0144] UL full power transmission may also be in full power mode 0, full power mode 1, full power mode 2, etc.

[0145] The advantages of subband precoding are also considered valid for UL full-power transmission. On the other hand, if subband precoding is supported / configured [simultaneously] with UL full-power transmission, additions / modifications / changes to existing specifications are expected.

[0146] Therefore, it is necessary to clarify whether subband precoding is supported / configured [simultaneously] with UL full-power transmission, and if subband precoding is supported / configured [simultaneously] with UL full-power transmission, how it operates / is controlled.

[0147] <Problem 3> When subband precoding is supported / configured [simultaneously] with multi-TRP UL transmission, it is necessary to clarify how to determine the TPMI [for CB] / SRI [for NCB] / precoder for multiple TRPs.

[0148] <Challenge 4> When subband precoding is supported / configured [simultaneously] with UL full-power transmission, it is necessary to consider whether or not to impose constraints. Specifically, it is necessary to consider whether or not it is permissible for UL transmission power to differ across different (multiple) subbands.

[0149] As described above, various regulations concerning subband precoding are still not sufficiently clear. Without clear regulations, there is a risk that UL transmission may not be properly controlled.

[0150] Therefore, the present inventors have conceived of the following embodiments in order to solve at least one of the above-mentioned problems 1 to 4. According to one aspect of this disclosure, UL transmission can be appropriately controlled.

[0151] 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.

[0152] (Various substitutions) In this disclosure, words enclosed in parentheses () may indicate an explanation of the preceding word (e.g., an explanation of spelling), a paraphrase, a specific example, or supplementary explanation. Also, in this disclosure, words enclosed in square brackets [] may be interpreted as part of the overall meaning of the text, or they may be interpreted as being excluded (ignored). Note that parentheses () and square brackets [] may be used for purposes / meanings other than those described above.

[0153] 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".

[0154] In this disclosure, terms such as notice, activate, deactivate, indicate (or specify), select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and capable of operating may be interpreted interchangeably.

[0155] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Elements (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0156] In this disclosure, the higher-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0157] 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).

[0158] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0159] 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.

[0160] 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 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 The following terms may be interchangeable: Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, 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 assumption, etc.

[0161] In this disclosure, TPMI and TPMI index may be interpreted as interchangeable. Port and antenna port may be interpreted as interchangeable. 8TX (8 transmit) may mean 8 ports and 8 antenna ports. Port / antenna port may mean port / antenna port for UL (e.g., SRS / PUSCH) transmit. In this disclosure, SRS resource set and resource set may be interpreted as interchangeable. Coherent group and SRS resource set may be interpreted as interchangeable.

[0162] This disclosure is not limited to 2TX, but may also apply to 5TX, 6TX, 7TX, TX of 8 or more, TX of 4 or less (1 to 4TX), etc. In the following embodiments, "2" may be read as "n (where n is any integer)," in which case the number of layers / ports etc. described assuming the maximum value is "2" can be appropriately read by a person skilled in the art assuming the maximum value is "n."

[0163] In this disclosure, "having the ability to..." may be interpreted as "supporting / reporting the ability to...".

[0164] In this disclosure, rank, transmission rank, number of layers, and number of antenna ports may be interpreted interchangeably. Also, the application of one codeword and the number of layers being four or less may be interpreted interchangeably. The application of two codewords and the number of layers being greater than four may be interpreted interchangeably.

[0165] In this disclosure, a table may be interpreted as one or more tables.

[0166] In this disclosure, the terms table, mapping, correspondence, association, and relationship may be interpreted interchangeably.

[0167] In this disclosure, the measured RS (which may also be called the measured RS or the RS being measured) may be a QCL source RS in an active (activated) TCI state / indicated TCI state.

[0168] Furthermore, in the following embodiments, DCI may mean a DCI that schedules at least one of PUSCH and PDSCH (for example, DCI format 0_x, 1_x (where x is an integer)).

[0169] In this disclosure, UL transmission may be interpreted as equivalent to DL reception. In this case, PUUSCH may be interpreted as equivalent to PDSCH.

[0170] The association between the precoding matrix W and the TPMI index in this disclosure may be defined in Specification 1 for Physical Channels and Modulation (Physical channels and modulation / Uplink / Physical channels / Physical uplink shared channel / Precoding). In this disclosure, the association, table P-x, TMPI table, precoding matrix table, and precoder table may be interchangeable.

[0171] In this disclosure, the association between precoding information (TPMI) and layer count (TRI) and the index (precoding information field value) may be defined in Specification 2 for Multiplexing and channel coding (Multiplexing and channel coding / Downlink transport channels and control information / Downlink control information / DCI formats / DCI format 0_1). In this disclosure, the association, table D-x, TRI / TPMI instruction table, DCI instruction table, and precoding information table may be interchangeable.

[0172] In this disclosure, TPMI, TPMI field, and precoding information may be interpreted interchangeably.

[0173] In this disclosure, resource blocks (RBs), physical resource blocks (PRBs), resource block groups (RBGs), subbands, widebands, and pre-coded resource block groups (PRGs) may be interpreted interchangeably.

[0174] In each of the following embodiments, the precoding matrix / precoder may mean a complete / partial / non-coherent precoder.

[0175] In this disclosure, existing precoders and wideband precoders may be interpreted interchangeably.

[0176] In this disclosure, novel precoder, subband precoder, precoder cycling, and cyclic precoder may be used interchangeably.

[0177] In this disclosure, precoder cycling may mean a [novel] precoder obtained (calculated) by multiplying an existing precoder by a specific matrix (which may be called cycling).

[0178] In this disclosure, the channel / signal subject to UL transmission may be any channel / signal in addition to PUSCH, SRS, and PUCCH.

[0179] In this disclosure, subband precoding, subband precoding for UL transmission, UL subband precoding, precoding for each subband, etc., may be interpreted interchangeably.

[0180] In this disclosure, TPMI for CB, SRI for CB, SRI for NCB, TPMI for each subband, SRI for each subband, subband TPMI, subband SRI, [application] precoder, subband precoder, precoder applied to one subband, precoder for each subband, precoder applied to each subband, etc., may be interpreted as one another.

[0181] In this disclosure, one TRP, one or more TRPs, multiple TRPs, etc., may be interpreted interchangeably.

[0182] In this disclosure, one TPMI field / SRI field, one or more TPMI fields / SRI fields, multiple TPMI fields / SRI fields, etc., may be interpreted as being interchangeable with each other.

[0183] In this disclosure, one TPMI / SRI, one or more TPMI / SRIs, multiple TPMI / SRIs, etc., may be interpreted interchangeably.

[0184] In this disclosure, one subband, one or more subbands, multiple subbands, etc., may be interpreted interchangeably.

[0185] In this disclosure, one precoder, one or more precoders, multiple precoders, etc., may be interpreted as one another.

[0186] In this disclosure, one UL transmission, one or more UL transmissions, multiple UL transmissions, etc., may be interpreted interchangeably.

[0187] In this disclosure, one UL transmit power, one or more UL transmit powers, multiple UL transmit powers, etc., may be interpreted interchangeably.

[0188] (Wireless communication method) In this disclosure, UL transmission may mean any UL channel / UL signal [transmission of]. UL transmission may be, for example, PUSCH / PUSCH DMRS / PUCCH / SRS.

[0189] In this disclosure, wideband may mean the entire bandwidth in which UL transmission is set.

[0190] In this disclosure, one wideband may include multiple subbands.

[0191] In this disclosure, the subband may mean a portion of the bandwidth in which UL transmission is configured.

[0192] In this disclosure, some of the following phrases may be interpreted as interchangeable: • UL subband precoding is set / enabled; • Instructions to set / enable UL subband precoding are received via RRC signaling / MAC CE / DCI; • UL PRG is set; • Multiple TPMIs [for CB] / SRIs [for NCB] are instructed for different subbands / PRGs.

[0193] In this disclosure, a multi-TRP UL transmission may be at least one of the following operations: • TDM-enabled multi-TRP UL transmission: A single DCI multi-TRP UL transmission applied to different TDM-enabled iterations with different TPMI / TCI states / SRIs. • SDM-enabled multi-TRP UL transmission: A single DCI multi-TRP UL transmission applied to different layers with different TPMI / TCI states / SRIs. • SFN multi-TRP UL transmission: A single DCI multi-TRP UL transmission applied to different SFN iterations with different TPMI / TCI states / SRIs. - Multiple UL transmissions with multiple DCI: Multiple (e.g., two) UL transmissions are scheduled by multiple (e.g., two) DCIs, the multiple DCIs are associated with different CORESET pool indices, the multiple UL transmissions partially / fully overlap in the time domain, and the multiple UL transmissions do not overlap or partially / fully overlap in the frequency domain, in a multi-DCI multi-TRP UL transmission (multiple UL transmissions may be transmitted using multiple panels).

[0194] In this disclosure, some of the following phrases may be interpreted as interchangeable: • Multi-TRP UL transmission is configured / enabled; • Instructions to configure / enable multi-TRP UL transmission are received via RRC signaling / MAC CE / DCI; • Multiple SRS resource sets are configured; • Multiple TCI states / TPMI [for CB] / SRI [for CB] / SRI [for NCB] are instructed for different TRPs.

[0195] In this disclosure, TRP, SRS resource set, TCI state, CORESET pool, etc., may be interpreted interchangeably.

[0196] In this disclosure, UL full power transmission, full power mode 0, full power mode 1, full power mode 2, etc., may be interpreted as interchangeable.

[0197] In this disclosure, some of the following phrases may be interpreted as interchangeable: • UL full power transmission is set / enabled; • Instructions to set / enable UL full power transmission are received via RRC signaling / MAC CE / DCI; • One full power TPMI is instructed for UL transmission (for full power mode 1 / full power mode 2).

[0198] <First Embodiment> The first embodiment relates to the simultaneous configuration of UL subband precoding and multi-TRP UL transmission. The first embodiment mainly relates to problem 1, but may also be applied to other problems (e.g., problems 2 / 3 / 4).

[0199] As shown in Figure 13, simultaneous configuration / enabling of UL subband precoding and multi-TRP UL transmission for each CC / BWP (or across BWP / CC) for a single UE is not supported (Option 1.1).

[0200] For example, a UE does not need to expect that UL subband precoding and multi-TRP UL transmission will be configured / enabled simultaneously in a given CC / BWP.

[0201] For example, a UE does not need to expect that UL subband precoding and multi-TRP UL transmission will be configured / enabled simultaneously in multiple CC / BWPs.

[0202] As shown in Figure 13, simultaneous configuration / enabling of UL subband precoding and multi-TRP UL transmission may be supported (Option 1.2).

[0203] In option 1.2, UL subband precoding / multi-TRP UL transmission may be configured / enabled using RRC signaling.

[0204] As shown in Figure 13, for a single UL transmission (e.g., PUSCH), the DCI may instruct either UL subband precoding or multi-TRP UL transmission. In this case, the UE does not have to expect the DCI to instruct both UL subband precoding and multi-TRP UL transmission simultaneously for a single UL transmission (e.g., PUSCH) (Option 1.2-1).

[0205] For example, if DCI instructs UL subband precoding, UE does not need to expect DCI to instruct multi-TRP UL transmission.

[0206] For example, if DCI instructs multi-TRP UL transmission, UE does not need to expect DCI to instruct UL subband precoding.

[0207] As shown in Figure 13, for a single UL transmission (e.g., PUSCH), DCI may instruct at least one of UL subband precoding and multi-TRP UL transmission. In this case, DCI may instruct both UL subband precoding and multi-TRP UL transmission simultaneously for a single UL transmission (e.g., PUSCH) (Option 1.2-2).

[0208] Which of the above options (for example, options 1.1 / 1.2 / 1.2-1 / 1.2-2) is applied may depend on the UE capabilities.

[0209] A UE capability may be defined indicating whether or not it supports UL subband precoding for multi-TRP UL transmission (i.e., UL subband precoding and multi-TRP UL transmission being configured / enabled simultaneously).

[0210] For example, option 1.2 / 1.2-1 / 1.2-2 may be applied to a UE that reports capability information indicating support for UL subband precoding for multi-TRP UL transmission.

[0211] For example, option 1.1 / 1.2-1 may be applied to a UE that does not support UL subband precoding for multi-TRP UL transmission.

[0212] If a UE reports capability information indicating support for UL subband precoding and capability information indicating support for multi-TRP UL transmission, that UE may support simultaneous configuration of UL subband precoding and multi-TRP UL transmission.

[0213] If a UE reports capability information indicating support for UL subband precoding and capability information indicating support for multi-TRP UL transmission, but does not report capability information indicating support for simultaneous configuration of UL subband precoding and multi-TRP UL transmission, then that UE is not required to support simultaneous configuration of UL subband precoding and multi-TRP UL transmission. Conversely, if a UE reports capability information indicating support for UL subband precoding, capability information indicating support for multi-TRP UL transmission, and capability information indicating support for simultaneous configuration of UL subband precoding and multi-TRP UL transmission, then that UE may support simultaneous configuration of UL subband precoding and multi-TRP UL transmission.

[0214] A UE in accordance with option 1.1 / 1.2-1 above may determine, based on information regarding UL subband precoding or information regarding multi-TRP UL transmissions, one or more precoders to apply to one or more UL transmissions (for one or more TRPs).

[0215] For example, if UL subband precoding is configured / enabled, the UE may determine, based on information regarding UL subband precoding, one or more subband precoders to apply to one UL transmission (for one TRP).

[0216] For example, when multi-TRP UL transmission is configured / enabled, the UE may determine multiple wideband precoders to apply to multiple UL transmissions (for multiple TRPs) based on information regarding multi-TRP UL transmission.

[0217] A UE in accordance with option 1.2 / 1.2-1 / 1.2-2 above may determine one or more subband precoders to apply to multiple UL transmissions (for multiple TRPs) based on information regarding UL subband precoding and information regarding multi-TRP UL transmissions.

[0218] According to the first embodiment described above, at least one setting of UL subband precoding and multi-TRP UL transmission can be appropriately performed.

[0219] <Second Embodiment> The second embodiment relates to the simultaneous configuration of UL subband precoding and UL full-power transmission. The second embodiment mainly relates to problem 2, but may also be applied to other problems (e.g., problems 1 / 3 / 4).

[0220] As shown in Figure 14, simultaneous configuration / enabling of UL subband precoding and UL full-power transmission for each CC / BWP (or across BWP / CC) for a single UE is not supported (Option 2.1).

[0221] For example, a UE does not need to expect that UL subband precoding and UL full-power transmission will be set / enabled simultaneously in a given CC / BWP.

[0222] For example, a UE does not need to expect that UL subband precoding and UL full-power transmission will be set / enabled simultaneously in multiple CC / BWPs.

[0223] As shown in Figure 14, simultaneous configuration / enabling of UL subband precoding and UL full-power transmission may be supported (Option 2.2).

[0224] In option 1.2, UL subband precoding / UL full-power transmission may be configured / enabled using RRC signaling.

[0225] As shown in Figure 14, for a single UL transmission (e.g., PUSCH), the DCI may instruct either UL subband precoding or UL full-power transmission. In this case, the UE does not have to expect the DCI to instruct both UL subband precoding and UL full-power transmission simultaneously for a single UL transmission (e.g., PUSCH) (Option 2.2-1).

[0226] For example, if DCI instructs UL subband precoding, UE does not need to expect DCI to instruct UL full-power transmission.

[0227] For example, if DCI instructs UL full-power transmission, UE does not need to expect DCI to instruct UL subband precoding.

[0228] As shown in Figure 14, for a single UL transmission (e.g., PUSCH), the DCI may instruct at least one of UL subband precoding and UL full-power transmission. In this case, for a single UL transmission (e.g., PUSCH), the DCI may instruct both UL subband precoding and UL full-power transmission simultaneously (Option 2.2-2).

[0229] Which of the above options (for example, options 2.1 / 2.2 / 2.2-1 / 2.2-2) applies may depend on the UE capabilities.

[0230] A UE capability may be defined indicating whether or not it supports UL subband precoding for UL full-power transmission (i.e., UL subband precoding and UL full-power transmission being configured / enabled simultaneously).

[0231] For example, option 2.2 / 2.2-1 / 2.2-2 may be applied to a UE that reports capability information indicating support for UL subband precoding for UL full-power transmission.

[0232] For example, option 2.1 / 2.2-1 may be applied to a UE that does not support UL subband precoding for UL full-power transmission.

[0233] If a UE reports capability information indicating support for UL subband precoding and capability information indicating support for UL full-power transmission, that UE may support simultaneous configuration of UL subband precoding and UL full-power transmission.

[0234] If a UE reports capability information indicating support for UL subband precoding and capability information indicating support for UL full-power transmission, but does not report capability information indicating support for simultaneous configuration of UL subband precoding and UL full-power transmission, then that UE is not required to support simultaneous configuration of UL subband precoding and UL full-power transmission. Conversely, if a UE reports capability information indicating support for UL subband precoding, capability information indicating support for UL full-power transmission, and capability information indicating support for simultaneous configuration of UL subband precoding and UL full-power transmission, then that UE may support simultaneous configuration of UL subband precoding and UL full-power transmission.

[0235] A UE in accordance with option 2.1 / 2.2-1 above may determine, based on information regarding UL subband precoding or information regarding UL full-power transmission, one or more precoders to apply to one or more UL transmissions (for one or more TRPs).

[0236] For example, when UL subband precoding is configured / enabled, the UE may determine, based on information regarding UL subband precoding, one or more subband precoders to apply to one UL transmission (for one TRP). These one or more subband precoders may be full-power precoders, non-full-power precoders, or a combination of full-power and non-full-power precoders.

[0237] For example, when UL full-power transmission is configured / enabled, the UE may determine, based on information regarding UL full-power transmission, one or more wideband precoders to apply to one or more UL transmissions (for one or more TRPs). These one or more wideband precoders may be full-power precoders, non-full-power precoders, or a combination of full-power and non-full-power precoders.

[0238] A UE in accordance with options 2.2 / 2.2-1 / 2.2-2 above may determine, based on information regarding UL subband precoding and information regarding multi-TRP UL transmissions, one or more subband precoders to be applied to one or more UL transmissions (for one or more TRPs). These one or more subband precoders may be full-power precoders, non-full-power precoders, or a combination of full-power and non-full-power precoders.

[0239] According to the second embodiment described above, at least one setting of UL subband precoding and UL full-power transmission can be appropriately performed.

[0240] <Third Embodiment> The third embodiment relates to a method for determining TPMI [for CB] / SRI [for NCB] / precoders for multiple TRPs. The third embodiment mainly relates to problem 3, but may also be applied to other problems (e.g., problems 1 / 2 / 4).

[0241] The UE may determine the precoder to apply to the UL transmission according to at least one of the following precoder determination methods.

[0242] <<Precoder Determination Method 1>> The same subband TPMI / subband SRI may be applied to multiple TRPs.

[0243] For example, one or more subband TPMI / subband SRIs (set / indicated by one or more TPMI / SRI fields in DCI) may be applied to both one or more PRGs of the first TRP and one or more PRGs of the second TRP.

[0244] UE may determine the subband TPMI / subband SRI for each subband.

[0245] Figure 15 shows an example of precoder determination method 1. As shown in Figure 15, the UE may determine the precoder to apply to each PRG, which includes multiple PRBs. Also, the precoder applied to each PRG of TRP#1 may be the same as the precoder applied to each PRG of TRP#2.

[0246] When multi-TRP UL transmission is configured, the number of subbands for each TRP may be the same. The UE may assume that the number of subbands for each TRP is the same.

[0247] When multi-TRP UL transmission is configured, the number of subbands may be the same for each TRP. In this case, the number of subbands for one TRP may be the same as or different from the number of subbands for other TRPs.

[0248] If at least one of multi-TRP UL transmission and UL subband precoding is configured / enabled, the TPMI field / SRI field (in DCI) may conform to at least one of the following options:

[0249] <<<Option 3.1-1>>> Only one TPMI field / SRI field (e.g., the first TPMI field / SRI field) may be present in the DCI.

[0250] When multi-TRP UL transmission is configured / enabled and UL subband precoding is configured / enabled, other TPMI / SRI fields (e.g., a second TPMI / SRI field) may be 0 bits (they may not exist in the DCI).

[0251] Option 3.1-1 may apply when UL subband precoding is configured / enabled semi-statically. For example, Option 3.1-1 may apply when UL subband precoding is configured / enabled by RRC signaling.

[0252] If UL subband precoding is not configured / enabled, one TPMI field / SRI field may be applied to one wideband of a particular TRP (e.g., a first TRP) and one wideband of another TRP (e.g., a second TRP). The UE may determine, based on one TPMI field / SRI field, which wideband precoder is applied to the first TRP and which wideband precoder is applied to the second TRP.

[0253] When UL subband precoding is set / enabled, one TPMI field / SRI field may be applied to one subband of a particular TRP (e.g., a first TRP). The UE may determine multiple subband precoders for a first TRP by applying precoder cycling to one subband of the first TRP to which one TPMI field / SRI field is applied. The UE may also apply multiple subband precoders for a first TRP to multiple subbands of another TRP (e.g., a second TRP). In other words, the subband precoders applied to each subband of a first TRP and the subband precoders applied to each subband of a second TRP may be the same / common or different.

[0254] When UL subband precoding is configured / enabled, one TPMI field / SRI field may be applied to one subband of a particular TRP (e.g., a first TRP) and one subband of another TRP (e.g., a second TRP). The UE may determine multiple subband precoders for a first TRP by applying precoder cycling to one subband of the first TRP to which one TPMI field / SRI field is applied. The UE may determine multiple subband precoders for a second TRP by applying precoder cycling to one subband of the second TRP to which one TPMI field / SRI field is applied. In this case, the subband precoders applied to each subband of the first TRP and the subband precoders applied to each subband of the second TRP may be the same / common or different.

[0255] <<<Option 3.1-2>>> Two TPMI / SRI fields (for example, a first TPMI / SRI field and a second TPMI / SRI field) may exist in the DCI.

[0256] Option 3.1-2 may apply when UL subband precoding is dynamically configured / enabled. For example, Option 3.1-2 may apply when UL subband precoding is configured / enabled by MAC CE / DCI.

[0257] If UL subband precoding is not configured / enabled, the two TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs.

[0258] If UL subband precoding is not set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs, and the other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs. The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0259] When UL subband precoding is set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one subband of a particular TRP (e.g., the first TRP). The UE may determine multiple subband precoders for the first TRP by applying precoder cycling to one subband of the first TRP to which the first TPMI / SRI field is applied. The UE may also apply the multiple subband precoders for the first TRP to multiple subbands of other TRPs (e.g., the second TRP). In other words, the subband precoders applied to each subband of the first TRP and the subband precoders applied to each subband of the second TRP may be the same / common or different. The other of the two TPMI / SRI fields (for example, the second TPMI / SRI field) may be reserved, ignored, or reinterpreted / reused for other purposes.

[0260] When UL subband precoding is set / enabled, one of the two TPMI / SRI fields (e.g., a first TPMI / SRI field) may be applied to one subband of a particular TRP (e.g., a first TRP) and to one subband of another TRP (e.g., a second TRP). The UE may determine multiple subband precoders for a first TRP by applying precoder cycling to one subband of the first TRP to which the first TPMI / SRI field is applied. The UE may determine multiple subband precoders for a second TRP by applying precoder cycling to one subband of the second TRP to which the first TPMI / SRI field is applied. In this case, the subband precoder applied to each subband of the first TRP and the subband precoder applied to each subband of the second TRP may be the same / common or different. The other of the two TPMI / SRI fields (for example, the second TPMI / SRI field) may be reserved, ignored, or reinterpreted / reused for other purposes.

[0261] <<<Option 3.1-3>>> There may be Y (where Y is an integer) TPMI / SRI fields in the DCI (for example, the first TPMI / SRI field, the second TPMI / SRI field, ..., the Yth TPMI / SRI field).

[0262] The value of Y may be the number of subbands (corresponding to at least one of the multiple TRPs).

[0263] Option 3.1-3 may apply when UL subband precoding is configured / enabled semi-statically. For example, Option 3.1-3 may apply when UL subband precoding is configured / enabled by RRC signaling.

[0264] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields may be applied to one wideband of a particular TRP (e.g., a first TRP) and one wideband of another TRP (e.g., a second TRP). The UE may determine, based on one TPMI / SRI field, which wideband precoder to apply to the first TRP and which wideband precoder to apply to the second TRP.

[0265] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs (e.g., the first TRP), and another (one) TPMI / SRI field (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0266] When UL subband precoding is set / enabled, Y TPMI / SRI fields may be applied to multiple TRPs. That is, the UE may determine Y subband precoders (for Y subbands) based on the Y TPMI / SRI fields [indicated by the TPMI / SRI], and apply these Y subband precoders to each of the multiple TRPs.

[0267] <<<Option 3.1-4>>> There may be Y (where Y is an integer) TPMI / SRI fields in the DCI (for example, the first TPMI / SRI field, the second TPMI / SRI field, ..., the Yth TPMI / SRI field).

[0268] The value of Y may be the number of subbands (corresponding to at least one of the multiple TRPs).

[0269] Options 3.1-4 may apply when UL subband precoding is dynamically configured / enabled. For example, options 3.1-4 may apply when UL subband precoding is configured / enabled by MAC CE / DCI.

[0270] If UL subband precoding is not set / enabled, two of the Y TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs. In this case, the remaining TPMI / SRI fields (Y-2 TPMI / SRI fields) may be 0 bits (may not exist).

[0271] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs (e.g., the first TRP), and another of the Y TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0272] When UL subband precoding is set / enabled, Y TPMI / SRI fields may be applied to multiple TRPs. That is, the UE may determine Y subband precoders (for Y subbands) based on the Y TPMI / SRI fields [indicated by the TPMI / SRI], and apply these Y subband precoders to each of the multiple TRPs.

[0273] According to precoder determination method 1, since it is sufficient to instruct multiple TRPs to use a common subband TPMI / subband SRI, the DCI overhead can be reduced.

[0274] <<Precoder Determination Method 2>> The UE may determine one or more subband TPMI / subband SRI for one of the multiple TRPs (also referred to as TRP#1 in Precoder Determination Method 2) (applicable to TRP#1).

[0275] For one or more subband TPMI / SRIs of TRPs other than TRP#1 among multiple TRPs (also referred to as TRP#2 in precoder determination method 2), an offset relative to the TPMI / SRI of the same subband of TRP#1 may be defined / set / indicated / determined.

[0276] The UE may determine one or more subband TPMI / subband SRIs for TRP#2 based on one or more subband TPMI / subband SRIs for TRP#1 and their offsets (see Figures 16 / 17).

[0277] The offset may be predefined by the specifications, set / indicated by RRC signaling / MAC CE / DCI, or determined by the UE implementation.

[0278] The order of the precoders determined based on TPMI / SRI may be predefined. Alternatively, the order of the precoders determined based on TPMI / SRI may be set / indicated by RRC signaling. The UE may determine the precoders for each subband of TRP#1 according to this order.

[0279] For example, the order could be TPMI / SRI#0 [precoder #0 determined based on TPMI / SRI#1], TPMI / SRI#1 [precoder #1 determined based on TPMI / SRI#2], TPMI / SRI#3 [precoder #3 determined based on TPMI / SRI#3], ... However, the order is not limited to this sequence.

[0280] The offset may be the offset of the index of the precoder determined based on TPMI / SRI (applied to the same subband of multiple TRPs).

[0281] For example, if the precoder determined based on the TPMI / SRI of TRP#1 (applied to a specific subband) is Wi, and the precoder determined based on the TPMI / SRI of TRP#2 (applied to the same specific subband) is Wj, then the offset may be the offset between the index i of the precoder determined based on the TPMI / SRI of TRP#1 and the index j of the precoder determined based on the TPMI / SRI of TRP#2 (see Figure 16).

[0282] The offset may also be a phase offset of the precoder determined based on TPMI / SRI (applied to the same subband of multiple TRPs).

[0283] If the precoder determined based on the TPMI / SRI of TRP#1 (applied to a specific subband) is W × αi, and the precoder determined based on the TPMI / SRI of TRP#2 (applied to the same specific subband) is W × αj, and W is the same / common for multiple TRPs (TRP#1 and TRP#2), then the offset may be an offset between phase αi and phase αj (see Figure 17).

[0284] If at least one of multi-TRP UL transmission and UL subband precoding is configured / enabled, the TPMI field / SRI field (in DCI) may conform to at least one of the following options:

[0285] <<<Option 3.2-1>>> Only one TPMI field / SRI field (e.g., the first TPMI field / SRI field) may be present in the DCI.

[0286] When multi-TRP UL transmission is configured / enabled and UL subband precoding is configured / enabled, other TPMI / SRI fields (e.g., a second TPMI / SRI field) may be 0 bits (they may not exist in the DCI).

[0287] Option 3.2-1 may apply when UL subband precoding is set / enabled semi-statically. For example, Option 3.2-1 may apply when UL subband precoding is set by RRC signaling.

[0288] If UL subband precoding is not configured / enabled, one TPMI field / SRI field may be applied to one wideband of a particular TRP (e.g., a first TRP) and one wideband of another TRP (e.g., a second TRP). The UE may determine, based on one TPMI field / SRI field, which wideband precoder is applied to the first TRP and which wideband precoder is applied to the second TRP.

[0289] When UL subband precoding is set / enabled, one TPMI field / SRI field may be applied to one subband of TRP#1. The UE may determine the precoder for each subband of TRP#1 based on the precoder for one subband of TRP#1 to which one TPMI field / SRI field is applied, and the order of predefined / set / instructed TPMI / SRI [determined based on precoders]. The UE may also determine the precoder to apply to each subband of TRP#2 based on the precoder to apply to each subband of TRP#1 and the offset.

[0290] <<<Option 3.2-2>>> Two TPMI / SRI fields (for example, a first TPMI / SRI field and a second TPMI / SRI field) may exist in the DCI.

[0291] Option 3.2-2 may apply when UL subband precoding is dynamically configured / enabled. For example, Option 3.2-2 may apply when UL subband precoding is configured / enabled by MAC CE / DCI.

[0292] If UL subband precoding is not configured / enabled, the two TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs.

[0293] If UL subband precoding is not set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs, and the other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs. The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0294] When UL subband precoding is set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one subband of TRP#1. The UE may determine the precoder for each subband of TRP#1 based on the precoder for one subband of TRP#1 to which the first TPMI / SRI field is applied, and the order of predefined / set / instructed TPMI / SRI [determined based on] the TPMI / SRI. The UE may also determine the precoder to apply to each subband of TRP#2 based on the precoder to apply to each subband of TRP#1 and an offset. The other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be reserved, ignored, or reinterpreted / reused for other purposes.

[0295] <<<Option 3.2-3>>> There may be Y (where Y is an integer) TPMI / SRI fields in the DCI (for example, the first TPMI / SRI field, the second TPMI / SRI field, ..., the Yth TPMI / SRI field).

[0296] The value of Y may be the number of subbands (of TRP#1).

[0297] Option 3.2-3 may apply when UL subband precoding is configured / enabled semi-statically. For example, Option 3.2-3 may apply when UL subband precoding is configured / enabled by RRC signaling.

[0298] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields may be applied to one wideband of a particular TRP (e.g., a first TRP) and one wideband of another TRP (e.g., a second TRP). The UE may determine, based on one TPMI / SRI field, which wideband precoder to apply to the first TRP and which wideband precoder to apply to the second TRP.

[0299] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs, and another (one) TPMI / SRI field (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0300] When UL subband precoding is set / enabled, Y TPMI / SRI fields may be applied to Y subbands of TRP#1. The UE may determine Y subband precoders to be applied to the Y subbands of TRP#1 based on the Y TPMI / SRI fields [indicated by the Y TPMI / SRI fields]. The UE may also determine Y subband precoders to be applied to the Y subbands of TRP#2 based on the Y subband precoders applied to the Y subbands of TRP#1 and an offset.

[0301] <<<Option 3.2-4>>> There may be Y (where Y is an integer) TPMI / SRI fields in the DCI (for example, the first TPMI / SRI field, the second TPMI / SRI field, ..., the Yth TPMI / SRI field).

[0302] The value of Y may be the number of subbands (of TRP#1).

[0303] Option 3.2-4 may apply when UL subband precoding is dynamically configured / enabled. For example, Option 3.2-4 may apply when UL subband precoding is configured / enabled by MAC CE / DCI.

[0304] If UL subband precoding is not set / enabled, two of the Y TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs. In this case, the remaining TPMI / SRI fields (Y-2 TPMI / SRI fields) may be 0 bits (may not exist).

[0305] If UL subband precoding is not set / enabled, one of the Y TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs (e.g., the first TRP), and another of the Y TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0306] When UL subband precoding is set / enabled, Y TPMI / SRI fields may be applied to Y subbands of TRP#1. The UE may determine Y subband precoders to be applied to the Y subbands of TRP#1 based on the Y TPMI / SRI fields [indicated by the Y TPMI / SRI fields]. The UE may also determine Y subband precoders to be applied to the Y subbands of TRP#2 based on the Y subband precoders applied to the Y subbands of TRP#1 and an offset.

[0307] According to precoder determination method 2, the precoder applied to each subband of one of the multiple TRPs (TRP #1) can be appropriately determined. Furthermore, the precoder applied to each subband of another TRP (TRP #2) can be appropriately determined based on the precoder applied to each subband of TRP #1 and the offset.

[0308] <<Precoder Determination Method 3>> Precoder cycling may be applied across multiple subbands of multiple TRPs.

[0309] UE may determine which precoder applies to each of the multiple subbands of the multiple TRPs according to at least one of the following options:

[0310] <<<Option 3.3-A1>>> Precoders for specific subbands of a particular TRP (e.g., TRP #1) may be specified according to existing specifications (e.g., TPMI for CB, SRI for NCB).

[0311] A specific subband may be represented by PRG#M. For example, PRG#M may be a PRG with index 0 (PRG#0), a PRG with the largest index, or an intermediate PRG (a PRG with an index greater than 0 and a PRG with an index smaller than the largest index).

[0312] The precoder for another subband (different from the specific subband) of a specific TRP (e.g., TRP#1) and the precoder for the subband of a TRP other than the specific TRP (e.g., TRP#2) may be determined by the UE (may depend on the UE implementation), may be determined according to predefined rules, or may be determined / set / instructed by RRC signaling.

[0313] <<<Option 3.3-A2>>> The precoder for subband / PRG / RBG#M of a specific TRP may be indicated by W1×α Ｍ W1 may mean one precoder indicated by existing specifications (e.g., TPMI for CB, SRI for NCB). α Ｍ may be called cycling, precoder cycling, [phase] rotation amount, etc. The applied precoder (subband precoder) may be derived by multiplying the common precoder W1 by the cycling α Ｍ

[0314] The cycling α (e.g., α Ｍ ) of a specific subband (e.g., subband / PRG / RBG#M) of a specific TRP may be determined by the UE (may depend on the UE implementation), may be determined according to predefined rules, or may be determined / set / instructed by RRC signaling.

[0315] <<<Option 3.3-B1>>> The order of precoder cycling may be determined according to predefined rules or may be determined / set / instructed by RRC signaling. This option is preferably applied to Option 3.3-A1, but may also be applied in other embodiments / options.

[0316] Precoder cycling may be applied across the precoders of multiple subbands of multiple TRPs (see Figure 18).

[0317] ​For example, if four precoders (e.g., W0, W1, W2, W3) are used for precoder cycling, the precoders applied to UL transmission (e.g., PUSCH) may be determined in the order W0, W1, W2, W3, W0, ... for subband #0 of TRP#1, subband #1 of TRP#1, subband #2 of TRP#1, ..., subband #0 of TRP#2, subband #1 of TRP#2, subband #2 of TRP#2, ... (see Figure 18). Note that this order of precoder cycling is just one example, and other orders may be applied.

[0318] <<<Option 3.3-B2>>> The order of precoder cycling may be determined according to predefined rules, or it may be determined / set / instructed by RRC signaling. This option is preferably applied to Option 3.3-A2, but may be applied to other embodiments / options.

[0319] α cycling may be applied across multiple subbands of multiple TRPs (see Figure 19).

[0320] For example, for subband #0 of TRP #1, subband #1 of TRP #1, subband #2 of TRP #1, ..., subband #0 of TRP #2, subband #1 of TRP #2, subband #2 of TRP #2, ..., α = {0, π / 2, π, 3π / 2, 0, π / 2, π, ...} (see Figure 19). Note that this order of precoder cycling is just one example, and other orders may be applied.

[0321] <<<Option 3.3-C1>>> Only one TPMI field / SRI field (e.g., the first TPMI field / SRI field) may be present in the DCI.

[0322] When multi-TRP UL transmission is configured / enabled and UL subband precoding is configured / enabled, other TPMI / SRI fields (e.g., a second TPMI / SRI field) may be 0 bits (they may not exist in the DCI).

[0323] Option 3.3-C1 may apply when UL subband precoding is semi-statically configured / enabled. For example, Option 3.3-C1 may apply when UL subband precoding is configured by RRC signaling.

[0324] If UL subband precoding is not configured / enabled, one TPMI field / SRI field may be applied to one wideband of a particular TRP (e.g., a first TRP) and one wideband of another TRP (e.g., a second TRP). The UE may determine, based on one TPMI field / SRI field, which wideband precoder is applied to the first TRP and which wideband precoder is applied to the second TRP.

[0325] When UL subband precoding is configured / enabled, one TPMI field / SRI field may be applied to one subband of a particular TRP. The UE may determine multiple subband precoders for multiple TRPs, including a particular TRP, by applying precoder cycling to one subband of a particular TRP to which one TPMI field / SRI field is applied.

[0326] <<<Option 3.3-C2>>> Two TPMI / SRI fields (for example, a first TPMI / SRI field and a second TPMI / SRI field) may exist in the DCI.

[0327] Option 3.3-C2 may apply when UL subband precoding is dynamically configured / enabled. For example, Option 3.3-C2 may apply when UL subband precoding is configured / enabled by MAC CE / DCI.

[0328] If UL subband precoding is not configured / enabled, the two TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs.

[0329] If UL subband precoding is not set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs (e.g., the first TRP), and the other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0330] When UL subband precoding is set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one subband of a particular TRP. The UE may determine multiple subband precoders for multiple TRPs, including a particular TRP, by applying precoder cycling to one subband of a particular TRP to which the first TPMI / SRI field is applied. The other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be reserved, ignored, or reinterpreted / reused for other purposes.

[0331] According to precoder determination method 3, DCI only needs to specify the TPMI / SRI of a specific subband among multiple subbands of multiple TRPs, thus reducing the overhead of DCI.

[0332] <<Precoder Determination Method 4>> The UE may determine the subband TPMI / subband SRI independently for each TRP.

[0333] Precoder cycling may be applied to each TRP.

[0334] UE may determine which precoder to apply to each of the multiple subbands of each TRP according to at least one of the following options:

[0335] <<<Option 3.4-A1>>> Precoders for specific subbands may be specified for each TRP according to existing specifications (e.g., TPMI for CB, SRI for NCB).

[0336] Multiple TPMI / SRIs may be designated for multiple TRPs according to existing specifications. In other words, multiple TPMI / SRIs may be designated for multiple TRPs using multiple TPMI fields / SRI fields.

[0337] For example, the DCI may include a first TPMI field / SRI field and a second TPMI field / SRI field. The first TPMI / SRI indicated using the first TPMI field / SRI field may be applied to a specific subband of TRP #1. The second TPMI / SRI indicated using the second TPMI field / SRI field may be applied to a specific subband of TRP #2.

[0338] A specific subband may be represented by PRG#M. For example, PRG#M may be a PRG with index 0 (PRG#0), a PRG with the largest index, or an intermediate PRG (a PRG with an index greater than 0 and a PRG with an index smaller than the largest index).

[0339] The precoders for other subbands (different from the specific subband) of a particular TRP (e.g., TRP #1, TRP #2) may be determined by the UE (and may depend on the UE implementation), determined according to predefined rules, or determined / set / instructed by RRC signaling.

[0340] <<<Option 3.4-A2>>> The precoder for a specific TRP subband / PRG / RBG#M is W1×α Ｍ It may be indicated by W1. W1 may mean one precoder specified for each TRP by an existing specification (e.g., TPMI for CB, SRI for NCB). α Ｍ This may also be called cycling, precoder cycling, [phase] rotation, etc. The applied precoder (subband precoder) cycles α to the common precoder W1. Ｍ It may also be derived by multiplying the two factors.

[0341] Multiple TPMI / SRIs may be designated for multiple TRPs according to existing specifications. In other words, multiple TPMI / SRIs may be designated for multiple TRPs using multiple TPMI fields / SRI fields.

[0342] For example, the DCI may include a first TPMI field / SRI field and a second TPMI field / SRI field. The first TPMI / SRI indicated using the first TPMI field / SRI field may be applied to a specific subband of TRP #1. The second TPMI / SRI indicated using the second TPMI field / SRI field may be applied to a specific subband of TRP #2.

[0343] Cycling α of multiple subbands of a single TRP (e.g., α Ｍ (M = 0, 1, ...) may be determined by the UE (may depend on the UE implementation), determined according to predefined rules, or determined / set / indicated by RRC signaling.

[0344] <<<Option 3.4-B1>>> The order of precoder cycling may be determined according to predefined rules, or it may be determined / set / instructed by RRC signaling. This option is preferably applied to Option 3.4-A1, but may be applied to other embodiments / options.

[0345] Precoder cycling may be applied to multiple precoders in multiple subbands of each TRP.

[0346] The order of precoder cycling applied to each TRP may be the same or different between TRPs.

[0347] For example, if four precoders (e.g., W0, W1, W2, W3) are used for precoder cycling, the precoders applied to UL transmissions to TRP#1 (e.g., PUSCH) may be determined in the order of TRP#1 subband #0, TRP#1 subband #1, TRP#1 subband #2, ... . Note that this precoder cycling order is just an example, and other orders may be applied. The precoders applied to UL transmissions to TRP#2 (e.g., PUSCH) may be determined in the same order as the precoder cycling applied to TRP#1, or in a different order.

[0348] <<<Option 3.4-B2>>> The order of precoder cycling may be determined according to predefined rules, or it may be determined / set / instructed by RRC signaling. This option is preferably applied to Option 3.4-A2, but may be applied to other embodiments / options.

[0349] The cycling of α may be applied to the α of multiple subbands of each TRP.

[0350] The cycling order of α applied to each TRP may be the same or different between TRPs.

[0351] For example, for subbands #0, #1, #2, ... of TRP #1, α = {0, π / 2, π, 3π / 2, 0, π / 2, π, ...}. The cycling order of α applied to subbands #0, #1, #2, ... of TRP #2 may be the same as or different from the cycling order of α applied to subbands #0, #1, #2, ... of TRP #1. Note that this precoder cycling order is just one example, and other orders may be applied.

[0352] <<<Option 3.4-C>>> Two TPMI / SRI fields (for example, a first TPMI / SRI field and a second TPMI / SRI field) may exist in the DCI.

[0353] If UL subband precoding is not configured / enabled, the two TPMI / SRI fields may be applied to each of multiple (e.g., two) TRPs.

[0354] If UL subband precoding is not set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one wideband (multiple subbands) of one of the multiple TRPs (e.g., the first TRP), and the other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one wideband (multiple subbands) of another of the multiple TRPs (e.g., the second TRP). The UE may determine the wideband precoder to apply to the first TRP based on the first TPMI / SRI field. The UE may determine the wideband precoder to apply to the second TRP based on the second TPMI / SRI field.

[0355] When UL subband precoding is set / enabled, one of the two TPMI / SRI fields (e.g., the first TPMI / SRI field) may be applied to one subband of the first TRP, and the other of the two TPMI / SRI fields (e.g., the second TPMI / SRI field) may be applied to one subband of the second TRP. The UE may determine the precoder for the other subbands of the first TRP by applying precoder cycling to the subband of the first TRP to which the first TPMI / SRI field is applied, and may determine the precoder for the other subbands of the second TRP by applying precoder cycling to the subband of the second TRP to which the second TPMI / SRI field is applied.

[0356] According to precoder determination method 4, DCI only needs to specify one subband TPMI / SRI for each TRP, thus reducing DCI overhead.

[0357] <<Precoder Determination Method 5>> The UE may determine the subband TPMI / subband SRI independently for each TRP.

[0358] Multiple TPMI / SRIs may be indicated for multiple subbands of each TRP (using multiple TPMI / SRI fields).

[0359] Multiple separate TPMI / SRIs may be specified for multiple TRPs. For example, multiple TPMI / SRIs for a first TRP may be specified separately from multiple TPMI / SRIs for a second TRP. Furthermore, multiple TPMI / SRIs for a first TRP may be the same as, or different from, multiple TPMI / SRIs for a second TRP.

[0360] When a single DCI multi-TRP is applied, the DCI may include multiple TPMI fields / SRI fields corresponding to multiple subbands of multiple TRPs.

[0361] For example, if the number of TRPs is 2 and the number of subbands (for each TRP) is N, DCI may indicate 2N TPMI / SRI (TPMI field / SRI field).

[0362] When multi-DCI multi-TRP is applied, the DCI corresponding to each TRP may include multiple TPMI fields / SRI fields corresponding to multiple subbands of each TRP.

[0363] For example, if the number of TRPs is 2 and the number of subbands (for each TRP) is N, the first DCI may indicate N TPMI / SRI (TPMI field / SRI field) for one of the two TRPs, and the second DCI may indicate N TPMI / SRI (TPMI field / SRI field) for the other of the two TRPs.

[0364] According to precoder determination method 5, the subbands TPMI / SRI can be specified individually, so an appropriate precoder can be applied to each subband.

[0365] According to the third embodiment described above, the precoder to be applied to UL transmission can be appropriately determined.

[0366] <Fourth Embodiment> The fourth embodiment relates to constraints / conditions when subband precoding is supported / configured [simultaneously] with UL full-power transmission. The fourth embodiment primarily relates to problem 4, but may also be applicable to other problems (e.g., problems 1 / 2 / 3).

[0367] The UE may determine multiple subband precoders for UL full-power transmission according to at least one of the following options:

[0368] <<Option 4.1>> The UE does not have to expect multiple precoders (multiple subband precoders) for subband precoding with different UL transmit power (e.g., PUSCH transmit power) in different subbands. In other words, the UE does not have to expect different precoders for different UL transmit powers to be applied to different subbands.

[0369] For example, if a UE determines a first subband precoder for a first UL transmit power for a first subband, the UE does not need to expect to determine a second subband precoder for a second UL transmit power different from that first UL transmit power for a second subband.

[0370] UE does not need to expect that multiple UL transmit powers, determined based on different subband precoders (for different subbands), will be different.

[0371] For example, the UE does not need to expect that the first UL transmit power, determined based on the first subband precoder applied to the first subband, and the second UL transmit power, determined based on the second subband precoder applied to the second subband, are different.

[0372] When a specific full-power mode (e.g., full-power mode 1 / full-power mode 2) is set, multiple (e.g., all) TPMIs of multiple (e.g., all) subbands may be full-power precoders.

[0373] For example, when a specific full-power mode is set, the first TPMI of the first subband, the second TPMI of the second subband, ..., the Kth TPMI of the Kth subband may all be full-power precoders.

[0374] Furthermore, when a specific full-power mode (e.g., full-power mode 1 / full-power mode 2) is set, multiple (e.g., all) TPMIs in multiple (e.g., all) subbands do not necessarily have to be full-power precoders (they may be non-full-power precoders).

[0375] For example, when a specific full-power mode is set, the first TPMI of the first subband, the second TPMI of the second subband, ..., the Kth TPMI of the Kth subband may all be non-full-power precoders.

[0376] When a specific full-power mode (e.g., full-power mode 1) is set, multiple (e.g., all) TPMIs in multiple (e.g., all) subbands may have the same number of non-zero-power antenna ports.

[0377] For example, when a specific full-power mode is set, each of the first TPMI of the first subband, the second TPMI of the second subband, ..., the Kth TPMI of the Kth subband may have L non-zero power antenna ports.

[0378] When a specific full-power mode (e.g., full-power mode 1) is set, multiple (e.g., all) TPMIs in multiple (e.g., all) subbands may have the same number of zero-power antenna ports.

[0379] For example, when a specific full-power mode is set, each of the first TPMI of the first subband, the second TPMI of the second subband, ..., the Kth TPMI of the Kth subband may have L zero-power antenna ports.

[0380] If TPMI is specified for each subband (i.e., UL subband precoding is set / enabled), the UE does not need to expect to be specified for multiple precoders (multiple subband precoders) with different UL transmit power (e.g., PUSCH transmit power) in different subbands. In other words, the UE does not need to expect to be specified for different precoders for different UL transmit powers that apply to different subbands.

[0381] For example, if a first subband precoder is specified for a first UL transmit power for a first subband, the UE does not need to expect a second subband precoder to be specified for a second UL transmit power different from that of the first UL transmit power.

[0382] Where precoder cycling is applied, the UE may determine multiple precoders for multiple subbands by precoder cycling. The multiple precoders may be full-power precoders only, or non-full-power precoders only.

[0383] For example, if the designated precoder (e.g., a precoder determined based on the TPMI / SRI indicated by the TPMI / SRI field in the DCI) is a full-power precoder, the UE may determine the precoders for other subbands by precoder cycling. In this case, the precoders for multiple other subbands may also be full-power precoders by precoder cycling.

[0384] For example, if the designated precoder (e.g., a precoder determined based on the TPMI / SRI indicated by the TPMI / SRI field in the DCI) is a non-full-power precoder, the UE may determine the precoders for other subbands by precoder cycling. In this case, the precoders for multiple other subbands may also be non-full-power precoders by precoder cycling.

[0385] <<Option 4.2>> The UE may determine multiple precoders (multiple subband precoders) for subband precoding with different UL transmit power (e.g., PUSCH transmit power) in different subbands. In other words, the UE may determine different precoders for different UL transmit powers applied to different subbands.

[0386] For example, if UE determines a first subband precoder for a first UL transmit power for a first subband, UE may determine a second subband precoder for a second UL transmit power different from that of the first UL transmit power for a second subband.

[0387] The UE may determine the UL transmit power for each subband.

[0388] The UE may apply the same UL transmit power to multiple (e.g., all) subbands. This UL transmit power may be the minimum UL transmit power among the multiple UL transmit powers [determined based on the precoders corresponding to those subbands]. In other words, the UE may apply the UL transmit power determined based on a non-full power precoder to those multiple subbands.

[0389] UE may apply different UL transmit powers to different subbands.

[0390] For example, the UE may determine a first UL transmit power based on a first subband precoder applied to a first subband, and a second UL transmit power based on a second subband precoder applied to a second subband. The first UL transmit power and the second UL transmit power may be different.

[0391] According to the fourth embodiment described above, even when both subband precoding and UL full-power transmission are set, the UL transmission power for each subband can be appropriately determined.

[0392] <Supplement> <<Notification of Information to UE>> In the embodiments described above, notification of any information from the Network (NW) (e.g., Base Station (BS)) to the UE (in other words, reception of any information from the BS at the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0393] If the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new Logical Channel ID (LCID) not defined in existing standards in the MAC subheader.

[0394] If the above notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, or the format of the DCI.

[0395] Furthermore, the notification of arbitrary information to the UE in the above-described embodiment may be periodic, semi-persistent, or aperiodic.

[0396] <<Notification of Information from UE>> Notification of any information from the UE to the NW in the embodiments described above (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0397] If the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new LCID not specified in existing standards in the MAC subheader.

[0398] If the above notice is made by the UCI, the notice may be transmitted using PUCCH or PUSCH.

[0399] Furthermore, the notification of any information from the UE in the above-described embodiment may be periodic, semi-persistent, or aperiodic.

[0400] <<Regarding the application of each embodiment>> In UE / BS, specific (one or more) processes / operations / controls / assumptions / information for at least one of the embodiments described above may be applied (or used) if any or more of the following conditions are met: - A higher-layer parameter indicating the specific process / operation / control / assumption / information is set; - The specific process / operation / control / assumption / information is determined based on the relevant higher-layer parameter; - The specific process / operation / control / assumption / information is designated / activated / triggered by MAC CE / DCI / UCI / Resource / Channel / RS; - A specific UE capability indicating (or related to) the specific process / operation / control / assumption / information is reported or supported; - The application of the specific process / operation / control / assumption / information is determined based on specific conditions.

[0401] The above-mentioned specific UE capabilities may indicate at least one of the following: - Supporting the above-mentioned specific processing / operation / control / assumption / information; - Supporting UL subband precoding; - Supporting multi-TRP UL transmission; - Supporting UL full-power transmission; - Supporting simultaneous configuration of UL subband precoding and multi-TRP UL transmission; - Supporting simultaneous configuration of UL subband precoding and UL full-power transmission; - Supporting simultaneous configuration of UL subband precoding, multi-TRP UL transmission, and UL full-power transmission; - Supporting precoder cycling; - Supporting UL subband precoding based on subband TPMI / subband SRI instructions; - The number of subbands / TPMI / SRI / precoders supported.

[0402] Furthermore, the above-mentioned specific UE capability may be a capability that applies across all frequencies (commonly regardless of frequency), a capability per frequency (e.g., one or a combination thereof, such as cell, band, band combination, BWP, component carrier, etc.), a capability per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), a capability per subcarrier spacing (SCS), or a capability per feature set (FS) or feature set per component-carrier (FSPC).

[0403] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes regardless of the duplexing scheme), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0404] If the above conditions are not met, UE / BS may follow the behavior specified in existing 3GPP releases.

[0405] (Note) The following inventions are noted with respect to one embodiment of the present disclosure (in particular, the first / second / fourth embodiments): [Note 1] A terminal having: a receiving unit that receives first setting information relating to subband precoding for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission and at least one of third setting information relating to UL full-power transmission; and a control unit that determines one or more subband precoders for one or more UL transmissions based on the first setting information and at least one of the second and third setting information. [Note 2] The terminal according to Note 1, wherein the control unit controls the reporting of capability information indicating that it supports simultaneous setting of the first setting information and at least one of the second and third setting information. [Note 3] The terminal according to Note 1 or Note 2, wherein the control unit determines one or more full-power precoders as the one or more subband precoders for the one or more UL transmissions when the receiving unit receives the first setting information and the third setting information. [Note 4] The terminal according to any one of Notes 1 to 3, wherein the control unit determines a plurality of precoders for different UL transmission powers as the one or more subband precoders for the one or more UL transmissions when the receiving unit receives the first setting information and the third setting information.

[0406] (Note) The following inventions are added with respect to one embodiment of the present disclosure (in particular, the third embodiment): [Note 1] A terminal having: a receiving unit that receives: first setting information relating to subband precoding for uplink (UL) transmission; second setting information relating to multi-transmit / receive point (TRP) UL transmission; and downlink control information (DCI) having one or more specific fields; and a control unit that determines one or more subband precoders for specific UL transmission based on the one or more specific fields. [Note 2] The terminal according to Note 1, wherein the control unit applies the one or more subband precoders determined based on the one or more specific fields to both a first TRP and a second TRP. [Note 3] The terminal according to Note 1 or Note 2, wherein the control unit determines one or more subband precoders for a second TRP based on one or more subband precoders for a first TRP determined based on the one or more specific fields and a specific offset. [Note 4] The control unit is a terminal according to any one of Notes 1 to 3, which applies precoder cycling across different TRPs.

[0407] (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 of the wireless communication methods according to the above embodiments of this disclosure, or a combination thereof.

[0408] Figure 20 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply called system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0409] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (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.

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

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

[0412] 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, number, shape, size, etc., 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.

[0413] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or by multiple antennas / base stations 10. One [virtual] cell (which may be called a supercell, for example) may be composed of multiple [virtual] cells (which may be called subcells, for example). A supercell may correspond to a cell with a fixed physical range, and a subcell may correspond to a cell whose physical range fluctuates quasi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0414] 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).

[0415] 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. Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be in a frequency band higher than FR2.

[0416] Furthermore, the user terminal 20 may communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0417] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 / Xn interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which 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.

[0418] 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.

[0419] The core network 30 may include network functions (NF) such as User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Multiple functions may be provided by a single network node. Furthermore, communication with an external network (e.g., the Internet) may occur via the DN.

[0420] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0421] 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-OFDM), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0422] 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.

[0423] 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, which is shared by each user terminal 20.

[0424] 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.

[0425] 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.

[0426] 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.

[0427] Furthermore, the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Furthermore, PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0428] 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. A UE may monitor CORESETs associated with a given search space based on the search space configuration.

[0429] 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.

[0430] PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgment information (for example, 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.

[0431] 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.

[0432] 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, the DL-RS may include 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.

[0433] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0434] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) may include a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. The DMRS may also be called a user-specific reference signal (UE-specific Reference Signal).

[0435] (Base Station) Figure 21 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission line interface 140 may be provided.

[0436] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0437] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0438] The control unit 110 may control aspects such as signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission, reception, measurements, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data, control information, a sequence, etc. to be transmitted as signals and transfer them to the transmission / reception unit 120. The control unit 110 may perform call processing (such as setting and releasing) of communication channels, state management of the base station 10, management of radio resources, etc.

[0439] The transmission / reception 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 transmission / reception unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. as described based on the common understanding in the technical field related to this disclosure.

[0440] The transmission / reception unit 120 may be configured as an integrated transmission / reception unit or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of the transmission processing unit 1211 and the RF unit 122. The reception unit may be composed of the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0441] The transmission / reception antenna 130 may be composed of an antenna as described based on the common understanding in the technical field related to this disclosure, such as an array antenna.

[0442] The transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0443] The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0444] The transmission / reception unit 120 (transmission processing unit 1211) may perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (for example, RLC retransmission control), processing of the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on data, control information, etc. acquired from the control unit 110, for example, and generate a bit string to be transmitted.

[0445] The transmission / reception unit 120 (transmission processing unit 1211) may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0446] The transmission / reception unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the signal in the radio frequency band via the transmission / reception antenna 130.

[0447] On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmission / reception antenna 130.

[0448] The transmission / reception unit 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing on the acquired baseband signal, and acquire user data, etc.

[0449] 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.

[0450] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0451] 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.

[0452] The base station 10 may be separated into three elements: a Radio Unit (RU), a Distributed Unit (DU), and a Central Unit (CU). For example, the RU may implement RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.). The DU may implement higher-level physical layer functions (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may implement PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0453] In this disclosure, base station 10 may include a single device that implements all the functions of RU, DU, and CU, or it may include multiple devices that each implement some of the functions of RU, DU, and CU and are connected to each other. In this disclosure, base station 10 may be interpreted as RU / DU / CU.

[0454] The transmitting / receiving unit 120 may transmit first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and at least one of third setting information relating to UL full-power transmission.

[0455] The control unit 110 may control the reception of one or more UL transmissions based on one or more subband precoders determined based on the first setting information and at least one of the second and third setting information.

[0456] The transmitting / receiving unit 120 may transmit first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields.

[0457] The control unit 110 may be instructed to determine one or more subband precoders for a specific UL transmission using one or more specific fields.

[0458] (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.

[0459] 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.

[0460] 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.

[0461] 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.

[0462] 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.

[0463] 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.

[0464] 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.

[0465] 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.

[0466] The transmitting / receiving unit 220 may use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of the transmitting beam and the receiving beam.

[0467] 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 to generate a bit sequence to be transmitted.

[0468] 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.

[0469] 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.

[0470] 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.

[0471] 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.

[0472] 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.

[0473] 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.

[0474] Incidentally, the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. The channel measurement resources may be, for example, non-zero power (Non Zero Power (NZP)) CSI-RS resources. Further, the measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources. The interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-interference measurement (Interference Measurement (IM)) resources, etc. Note that CSI-IM may also be referred to as CSI-interference management (Interference Management (IM)), or may be mutually read as zero power (Zero Power (ZP)) CSI-RS. In the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be mutually read.

[0475] Incidentally, the transmission unit and the reception unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmission and reception unit 220 and the transmission and reception antenna 230.

[0476] The transmission and reception unit 220 may receive at least one of first setting information regarding precoding for each subband for uplink (UL) transmission, second setting information regarding multi-transmission and reception point (TRP) UL transmission, and third setting information regarding UL full power transmission (first / second embodiments).

[0477] The control unit 210 may determine one or more subband precoders for one or more UL transmissions based on the first setting information and at least one of the second setting information and the third setting information (first / second embodiments).

[0478] The control unit 210 may control the reporting of capability information indicating that it supports the simultaneous setting of the first setting information and at least one of the second setting information and the third setting information (first / second embodiments).

[0479] When the transmitting / receiving unit 220 receives the first setting information and the third setting information, the control unit 210 may determine one or more full-power precoders as one or more subband precoders for one or more UL transmissions (fourth embodiment).

[0480] When the transmitting / receiving unit 220 receives the first setting information and the third setting information, the control unit 210 may determine a plurality of precoders for different UL transmission powers as the one or more subband precoders for the one or more UL transmissions (fourth embodiment).

[0481] The transmitting / receiving unit 220 may receive first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields (third embodiment).

[0482] The control unit 210 may determine one or more subband precoders for a specific UL transmission based on one or more specific fields (third embodiment).

[0483] The control unit 210 may apply the one or more subband precoders determined based on the one or more specific fields to both the first TRP and the second TRP (third embodiment).

[0484] The control unit 210 may determine one or more subband precoders of a second TRP based on one or more subband precoders of a first TRP determined based on one or more specific fields and a specific offset (third embodiment).

[0485] The control unit 210 may apply precoder cycling across different TRPs (third embodiment).

[0486] (Hardware Configuration) The block diagram used in the description of the above embodiment shows 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.

[0487] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, exploration, 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.

[0488] 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.

[0489] 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.

[0490] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, the processing may be performed by one processor, or it may be performed by two or more processors simultaneously, sequentially, or by other means. Note that the processor 1001 may be implemented using one or more chips.

[0491] 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 control at least one of reading and writing data in the memory 1002 and storage 1003.

[0492] 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 devices, 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.

[0493] 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.

[0494] The 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. The memory 1002 may also be called a register, cache, or main memory. The memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of the present disclosure.

[0495] The 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 Use Disk, a Blu-ray (registered trademark) 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. The storage 1003 may also be called an auxiliary storage device.

[0496] 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 transmitting unit 120a (220a) and receiving unit 120b (220b).

[0497] 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).

[0498] 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.

[0499] 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), a field programmable gate array (FPGA), a graphics processing unit (GPU), and a neural processing unit (NPU), 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.

[0500] Furthermore, devices included in the core network 30 (for example, network nodes that provide NF) may also be implemented using the functional block / hardware configuration described above.

[0501] (Variations) 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.

[0502] 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.

[0503] Here, the neurology may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neurology 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, and specific windowing processes performed by the transceiver in the time domain.

[0504] 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.

[0505] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using minislots may be called a PDSCH (PUSCH) mapping type B.

[0506] 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.

[0507] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe in existing LTE (1 ms), a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing a TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0508] Here, TTI refers to, for example, the smallest time unit 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.

[0509] 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. When a TTI is given, the actual time interval (e.g., number of symbols) in which the transport block, code block, code word, etc. are mapped may be shorter than the TTI.

[0510] Furthermore, if one slot or one mini-slot is referred to as a TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit for scheduling. In addition, the number of slots (number of mini-slots) that constitute this minimum time unit for scheduling may be controlled.

[0511] A TTI with a time length of 1 ms may be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0512] 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.

[0513] 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.

[0514] 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. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0515] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0516] 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.

[0517] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. The PRBs may be defined and numbered within a given BWP.

[0518] A BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within a single carrier for a UE.

[0519] At least one of the configured BWPs may be active, and the UE does not need to assume that it will transmit or receive a predetermined signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0520] The structures of wireless frames, subframes, slots, minislots, and symbols described above are merely examples. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in 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 the TTI can be varied in various ways.

[0521] 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.

[0522] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements using 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.

[0523] 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.

[0524] 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.

[0525] 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.

[0526] Any information described in this disclosure (e.g., variables, constants, parameters) may be communicated from any first device (e.g., UE / base station) to any second device (e.g., base station / UE) that indicates / specifies (or relates to) the value of such any information, even if not specifically stated in the embodiments described above.

[0527] 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.

[0528] 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 Elements (CEs).

[0529] 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).

[0530] The determination may be made by a value represented by one 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).

[0531] 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.

[0532] 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.

[0533] 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).

[0534] 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,” “port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” and “receiving entity” may be used interchangeably.

[0535] In this disclosure, "antenna port" may be interpreted interchangeably with "antenna port for any signal / channel" (e.g., a Demodulation Reference Signal (DMRS) port). In this disclosure, "resource" may be interpreted interchangeably with "resource for any signal / channel" (e.g., a reference signal resource, an SRS resource, etc.). Resources may include time / frequency / code / spatial / power resources. Furthermore, a spatial domain transmit filter may include at least one of a spatial domain transmit filter and a spatial domain receive filter.

[0536] The above group may include, for example, at least one of the following: a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, or a panel group.

[0537] Furthermore, in this disclosure, terms such as beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), and RS may be interpreted interchangeably.

[0538] Furthermore, in this disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc., may be interpreted interchangeably.

[0539] Furthermore, in this disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interpreted interchangeably.

[0540] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset may be interpreted interchangeably.

[0541] 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 (TCI state)" may be interpreted as mutually exclusive as "a set of spatial relationship information (TCI state)," "one or more pieces of spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive. Spatial relationship information and spatial relationship may be interpreted as mutually exclusive.

[0542] 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.

[0543] A base station may house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station may 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.

[0544] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

[0545] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0546] 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.

[0547] 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.

[0548] 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.

[0549] 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.

[0550] 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.

[0551] 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.

[0552] 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).

[0553] 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 amount signals acquired by accelerator pedal sensor 55, brake pedal depression amount signals acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals acquired by object detection sensor 58 for detecting obstacles, vehicles, pedestrians, etc.

[0554] 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, display, 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 (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0555] 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.) or output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0556] 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.

[0557] 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.

[0558] 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).

[0559] 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 the information based on the above input.

[0560] 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).

[0561] 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.

[0562] 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 of the base station 10 described above. 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, downlink channel, etc., may be interpreted as sidelink channel.

[0563] 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.

[0564] 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 having 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.

[0565] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between as needed 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 using exemplary order and are not limited to the specific order presented.

[0566] Each aspect / embodiment described in this disclosure is 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®), IEEE 802.20, systems utilizing Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, and next-generation systems extended, modified, created, or defined based thereon may also be applied. Furthermore, multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).

[0567] 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."

[0568] 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.

[0569] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to mean judging, calculating, computing, processing, deriving, investigating, looking up, searching, or inquiring (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0570] 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).

[0571] Furthermore, “judgment (decision)” may be considered as “judgment (decision)” of resolving, selecting, choosing, establishing, comparing, etc. In other words, “judgment (decision)” may be considered as “judgment (decision)” of some action. In this disclosure, “judgment (decision)” may be interpreted as mutually interchangeable with the actions described above.

[0572] Furthermore, in this disclosure, “determine / determining” may be interpreted as “assume / assuming,” “expect / expecting,” or “consider / considering.” In addition, in this disclosure, “not expecting to do…” may be interpreted as “expecting not to do….”

[0573] In this disclosure, "expect" may be rephrased as "be expected." For example, "expect(s) ..." (where "..." may be expressed as a that clause, an infinitive, etc.) may be rephrased as "be expected ..." or "do (the verb without "to" if "..." is an infinitive)." Similarly, "does not expect ..." may be rephrased as "be not expected ..." or "do not (the verb without "to" if "..." is an infinitive)." Furthermore, "An apparatus A is not expected ..." may be rephrased as "An apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0574] The term "maximum transmit power" as used in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0575] 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.”

[0576] 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, and optical (both visible and invisible) domain.

[0577] 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."

[0578] 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.

[0579] 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.

[0580] In this disclosure, "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. In addition, in this disclosure, words meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably with "i-th highest").

[0581] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0582] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" may be interchangeable. Furthermore, A, B, etc., may be replaced with appropriate expressions such as nouns, gerunds, or regular sentences depending on the context. The time difference between A and B may be approximately zero (immediately after or immediately before). Additionally, a time offset may be applied to the time when A occurs. For example, "A" may be interpreted as "before / after the time offset when A occurs". The time offset (e.g., one or more symbols / slots) may be predetermined or determined by the UE based on notified information.

[0583] In this disclosure, timing, time, duration, time instance, any unit of time (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc., may be interpreted interchangeably.

[0584] 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 descriptions herein are illustrative and not intended to be restrictive in any way to the invention described herein.

[0585] This application is based on Japanese Patent Application No. 2024-227944, filed on December 24, 2024. All of its contents are included here.

Claims

1. A terminal having a receiving unit that receives first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields, and a control unit that determines one or more subband precoders for specific UL transmission based on the one or more specific fields.

2. The terminal according to claim 1, wherein the control unit applies the one or more subband precoders determined based on the one or more specific fields to both the first TRP and the second TRP.

3. The terminal according to claim 1, wherein the control unit determines one or more subband precoders of a second TRP based on one or more specific fields and a specific offset.

4. The terminal according to claim 1, wherein the control unit applies precoder cycling across different TRPs.

5. A wireless communication method for a terminal, comprising the steps of receiving: first setting information relating to precoding for each subband for uplink (UL) transmission; second setting information relating to multi-transmit / receive point (TRP) UL transmission; and downlink control information (DCI) having one or more specific fields; and determining one or more subband precoders for specific UL transmission based on the one or more specific fields.

6. A base station having a transmitting unit that transmits first setting information relating to precoding for each subband for uplink (UL) transmission, second setting information relating to multi-transmit / receive point (TRP) UL transmission, and downlink control information (DCI) having one or more specific fields, and a control unit that instructs to determine one or more subband precoders for specific UL transmission using the one or more specific fields.

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