Terminal, wireless communication method, and base station

Abstract

A terminal according to one aspect of the present disclosure comprises: a receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency part and indicating an SRS Resource Indicator (SRI) and a second field corresponding to a second frequency part and indicating an SRI; and a control unit that determines that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field. According to said one aspect of the present disclosure, a TPMI or SRI instruction can be appropriately issued.

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] In future wireless communication systems (e.g., NR), when performing UL transmission (e.g., PUSCH transmission), support for UL subband precoding, which applies multiple precodings in the frequency domain, is being considered.

[0006] However, the method of indicating TPMI / SRI using DCI when applying UL subband precoding has not been sufficiently considered. If the indication of the Transmitted Precoding Matrix Indicator (TPMI) / SRS Resource Indicator (SRI) for the subband (frequency portion) by Downlink Control Information (DCI) is not performed properly, the overhead caused by DCI indication may increase.

[0007] Therefore, one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately issue TPMI or SRI instructions.

[0008] A terminal according to one aspect of the present disclosure is characterized by having a receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency portion and indicating an SRS Resource Indicator (SRI) and a second field corresponding to a second frequency portion and indicating an SRI, and a control unit that determines that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field.

[0009] According to one aspect of this disclosure, TPMI or SRI can be appropriately directed.

[0010] 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 10 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 in 16 NR. Figure 6 shows an example of the correspondence between field values ​​of precoding information and layer number and layer number and TPMI in Rel. 7A to 7D show an example of antenna layout for codebooks 1 to 4 using 8 antenna ports. Figure 8 shows options 1 and 2 showing DCI extensions for function #2. Figure 9 shows an example of the correspondence between legacy fields and new fields in 4TX, fully and partially and non-coherent in Example 1. Figure 10 shows an SRI instruction for non-codebook-based PUSCH transmission. Figure 11 shows an example of the correspondence of bits in a new field in 4TX, fully and partially and non-coherent, maximum rank = 4 in Embodiment 1-1. Figure 12 shows the relationship between the bit size of the new field (second field) and the first embodiment when option 1 is applied.Figure 13 shows an example of the TPMI index indicated by the new field in option 1-2-1. Figure 14 shows an example of the TPMI index after Mod calculation indicated by the new field in option 1-2-1. Figure 15 shows an example of the TPMI index indicated by the new field in option 1-2-2. Figure 16 shows an example of the TPMI index indicated by the new field in option 1-2-3. Figure 17 shows an example of the schematic configuration of a wireless communication system according to one embodiment. Figure 18 shows an example of the configuration of a base station according to one embodiment. Figure 19 shows an example of the configuration of a user terminal according to one embodiment. Figure 20 shows an example of the hardware configuration of a base station and user terminal according to one embodiment. Figure 21 shows an example of a vehicle according to one embodiment.

[0011] (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).

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

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

[0014] SRS resource set information may include 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.

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

[0016] Furthermore, the application (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management, codebook (CB), noncodebook (NCB), antenna switching, etc. 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.

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

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

[0019] The spatial 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).

[0020] 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.

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

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

[0023] 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.

[0024] 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.

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

[0026] In Rel. 15 / 16 NR, when using codebook-based transmission for PUSCH, the UE may have up to two SRS resources, with the 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.

[0027] 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.

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

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

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

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

[0032] 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.

[0033] (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.

[0034] 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.

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

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

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

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

[0039] For example, the RRC parameter "pusch-TransCoherence" indicating the UE capability may indicate fullCoherent, partialCoherent, or nonCoherent. Also, the RRC parameter "codebookSubset" may indicate "fullyAndPartialAndNonCoherent", "partialAndNonCoherent", or "nonCoherent".

[0040] FullCoherent may mean that the synchronization of all antenna ports used for transmission is achieved (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.). PartialCoherent may mean that some of the antenna ports used for transmission are synchronized, but the synchronization between the some ports and other ports cannot be achieved. NonCoherent may mean that the synchronization of each antenna port used for transmission cannot be achieved.

[0041] Note that a UE supporting a fullCoherent precoder type may be assumed to support partialCoherent and nonCoherent precoder types. A UE supporting a partialCoherent precoder type may be assumed to support a nonCoherent precoder type.

[0042] In the present disclosure, the precoder type, coherence, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, etc. may be read as each other.

[0043] 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.

[0044] 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).

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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).

[0050] 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).

[0051] 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).

[0052] 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.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] 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).

[0058] 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).

[0059] 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.

[0060] (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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] (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.

[0067] Figures 7A to 7D show examples of antenna layouts for Codebooks 1 to 4 using 8 antenna ports. Ng is the number of antenna groups. The layout is represented as (M, N, P). 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. d represents the horizontal and vertical spacing between the centers of adjacent antenna groups, respectively.

[0068] 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.

[0069] 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. Also, each coherent group may correspond to a different receive TRP. Furthermore, coherent groups may also be called coherent antenna groups, port groups, antenna sets, etc.

[0070] 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.

[0071] Note that the antenna layout is not limited to the examples shown in Figures 7A to 7D. For example, the number of panels on which the antennas are placed, the orientation of the panels, the coherence of each panel / antenna (fully coherent, partially coherent, noncoherent, etc.), the antenna arrangement in a specific direction (horizontal, vertical, etc.), and the polarization antenna configuration (single polarization, cross-polarization, number of polarization planes, etc.) may differ from the examples in Figures 7A to 7D.

[0072] 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.

[0073] (E capability in 8TX UL) 8TX UL supports both codebook-based and non-codebook-based PUSCH transmissions.

[0074] In the case of non-codebook-based PUCH, a maximum of N_SRS = 8 single-port SRS resources can be configured for a single resource set. Additionally, up to 8 bits of SRI within the DCI are used to indicate the rank. Note that Rel. 15 / 16 / 17 supports a maximum of N_SRS = 4 and 4-bit SRI.

[0075] In codebook-based PUSCH transmission, four codebook types (codebooks 1-4) are defined, and the UE may report whether it supports each codebook type as part of its UE capability information. As shown in Figures 7A-7D, the codebook type is related to the UE's antenna layout and coherence assumptions.

[0076] (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.

[0077] 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.

[0078] When frequency-selective precoding is set by RRC / MAC CE / DCI, the DCI format may include a field (e.g., a new (Y-1) field) indicating the TPMI corresponding to each frequency portion of the UL transmission, where Y may be the number of frequency portions to which the frequency-selective precoding is applied / set (or the number of frequency-selective precodings).

[0079] In this case, the information (or table) corresponding to the code point indicating the first frequency portion may be different from the information (or table) corresponding to the code point indicating the other frequency portions.

[0080] For example, the rank and TPMI of the first frequency portion may be indicated using a TPMI notification field included in the DCI (e.g., the "Precoding information and number of layers" field supported by the existing system). For the remaining frequency portions (e.g., (Y-1) frequency portions), a new TPMI notification field may be set for each frequency portion.

[0081] In other words, when frequency selection precoding is set / applied, the configuration may be such that the rank / layer number and TPMI are indicated using fields / code points corresponding to a portion of multiple frequency parts (e.g., a first frequency part), and the TPMI is indicated using fields / code points corresponding to other frequency parts (without indicating the rank / layer number). Furthermore, the size of the field corresponding to a portion of multiple frequency parts (e.g., a first frequency part) and the size of the field corresponding to other frequency parts may be set to be the same or to be set differently.

[0082] For example, the number of new fields (Y-1) (or the number of new fields) may be set in relation to the UL bandwidth (UL BW). The actual number of effective fields (or field numbers) may also be related to the scheduled frequency resource (e.g., FDRA).

[0083] (Analysis) As mentioned above, in Rel. 18 NR and later, when performing UL transmission (e.g., PUSCH transmission), support for UL subband precoding, which applies multiple precodings in the frequency domain, is being considered.

[0084] However, the method for indicating TPMI / SRI by DCI when applying UL subband precoding has not been sufficiently studied. If TPMI / SRI indication for the subband (frequency portion) by DCI is not performed appropriately, the overhead due to DCI transmission may increase. Therefore, the inventors have devised a method for appropriately indicating TPMI or SRI.

[0085] 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.

[0086] (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.

[0087] 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".

[0088] 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.

[0089] 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.

[0090] In this disclosure, the upper layer signaling may be any or a combination thereof, such as Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and other messages (e.g., messages from the core network, such as positioning protocol messages (e.g., NR Positioning Protocol A (NRPPPa) / LTE Positioning Protocol (LPP)) messages).

[0091] 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).

[0092] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0093] In this disclosure, "field" may mean a DCI field. In this disclosure, "first field," "first field," and "legacy field" may be interpreted as interchangeable. "Second field," "second field," "new field," and "other field (fields other than the first field)" may be interpreted as interchangeable. "Second field" may be interpreted as two or more fields (second field, third field, ... and nth field). "Precoder," "precoder type," "rank," and "layer" may be interpreted as interchangeable.

[0094] In this disclosure, co-phasing, phase difference, phase compensation between polarizations, and φ may be interpreted as mutually exclusive. In this disclosure, the frequency portion and subband may be interpreted as mutually exclusive.

[0095] In this disclosure, TPMI and SRI may be interpreted as interchangeable. For example, the TPMI in each embodiment may be a subband TPMI for codebook-based PUSCH. The TPMI may be interpreted as precoding information and number of layers. The SRI may be a subband SRI for non-codebook-based PUSCH. The SRI may be a second SRI (Second SRS resource indicator), or may be interpreted as both the SRI and the second SRI.

[0096] (Wireless communication method) For codebook-based / non-codebook PUSCH transmission, two functions are possible. For example, function #1 is precoder cycling (close to open loop), and function #2 is subband precoding by subband / PRG TPMI / SRI instruction (close to closed loop based on channel estimation based on CSI feedback or SRS measurement).

[0097] Here, function #2-1 is a subband TPMI for codebook-based PUSCH, and function #2-2 is a subband SRI for non-codebook-based PUSCH.

[0098] Figure 8 shows options 1 and 2, which illustrate the DCI extension for function #2. Figure 8 shows multiple sets (fields) of TPMI in DCI. Note that TPMI may be replaced with SRI. Option 1 assigns legacy / new TPMI fields to each frequency portion / subband of the scheduled PUSCH. In option 2, the first set (legacy TPMI field) is designated for the wideband, and subsequent sets (new TPMI fields) are designated for subbands.

[0099] In either Option 1 or Option 2, if each new field has the same bit size as the legacy field, Feature #2 will result in a significant increase in bit size. Therefore, it is preferable to consider a low-overhead DCI instruction method.

[0100] 2TX / 4TX supports nested codebooks. Therefore, legacy fields may refer to non-coherent / partially coherent / fully coherent precoders from the same TPMI table.

[0101] 8TX supports non-nested codebooks. Therefore, only one precoder type is configured and indicated from a single TPMI table.

[0102] Therefore, the overhead reduction designs may differ between 2TX / 4TX and 8TX.

[0103] Examples 1 and 2 below illustrate how to instruct the system to reduce overhead. The actual bit size of the new field is related to the rank instructed in the legacy / first field.

[0104] In the case of a TPMI instruction, the first field indicates both rank and TPMI, and the remaining instructions can only be given by precoders with the same rank as the first field, thus allowing the rank instruction to be omitted and reducing the bit size (Example 1).

[0105] In the case of SRI instruction, the first field indicates an SRI that only indicates the rank. The remaining instructions are only from SRIs that have the same rank as the first field, so the rank instruction can be omitted and the bit size can be reduced (Example 2).

[0106] <Example 1> Figure 9 shows an example of the correspondence between legacy fields and new fields in 4TX, fully and partially and non-coherent in Example 1.

[0107] For example, suppose the first field uses the conventional bit size of 6 bits to indicate "1 layer: TPMI = x". In this case, the UE may determine that the new field (TPMI corresponding to each frequency) indicates a precoder with only one layer. In the case of one layer, TPMI is between 0 and 31, so it can be indicated with 5 bits.

[0108] For example, if "4 layers: TPMI = x" is indicated in the first field using the conventional 6-bit bit size, the UE may assume that the subsequent new fields (TPMI corresponding to each frequency) will indicate five precoders for the 4 layers. In the case of 4 layers, since TPMI is 0 to 4, it can be indicated with 3 bits.

[0109] However, if dynamic scheduling of ranks is also required, five bits (the maximum number of bits required to indicate TPMI for all layers) may be used for the new DCI bit size indication.

[0110] <Example 2> Figure 10 shows an SRI instruction for non-codebook-based PUSCH transmission. The bit fields in Figure 10 represent the bit fields in DCI.

[0111] For example, if the SRI bit field is set to 0-3 for the first frequency portion, it means that rank = 1 is specified. Since the other frequency portions are assumed to have the same rank, there are only four cases for specifying SRS (SRI). In this case, the SRI for the other frequency portions can be specified using 2 bits (index 0-3).

[0112] Similarly, if SRI = 4 to 9 is indicated for the first frequency portion, it means that rank = 2 is indicated. For the other frequency portions, the same rank is assumed, and there are only six cases for the indicated SRS (SRI). In this case, it is possible to indicate SRI with 3 bits (indexes 4 to 9). For example, the conventional indices 4 to 9 may be replaced with the new indices 0 to 5.

[0113] Similarly, if SRI = 10 to 13 is indicated for the first frequency portion, it means that rank = 3 is indicated. For the other frequency portions, the same rank is assumed, and there are only four cases for the indicated SRS (SRI). In this case, it is possible to indicate SRI with 2 bits (indexes 10 to 13). For example, the conventional indices 10 to 13 may be replaced with the new indices 0 to 3.

[0114] Similarly, if SRI=14 is indicated for the first frequency portion, it means that rank=4 is indicated. For the other frequency portions, the same SRS resource indications (0, 1, 2, 3) are applied without using additional bits. Alternatively, index 0 indicates (0, 1, 2, 3).

[0115] [Fixed bit count case] However, the number of SRS is N ＳＲＳ = 4, Number of layers L ｍａｘ = 4. When the different rank indications r = 1 / 2 / 3 / 4, the maximum DCI size N of each new SRI field may be fixed at 3 bits. N is calculated by the following formula.

[0116]

[0117] For example, if the SRI of the first frequency portion indicates r (rank) = 1, only indices 0 to 3 are indicated by 3 bits. If the SRI of the first frequency portion indicates r = 2, only indices 0 to 5 are indicated by 3 bits. If the SRI of the first frequency portion indicates r = 3, only indices 0 to 3 are effectively indicated by 3 bits.

[0118] If the SRI of the first frequency portion indicates r=4, only index 0 is valid, and the SRI is indicated by 3 bits. Alternatively, if there is no valid index, the UE assumes that the other frequency portions have the same indicated SRI as the first frequency portion.

[0119] <First Embodiment> The UE receives a DCI including a first field indicating TPMI corresponding to a first frequency portion and a second field indicating TPMI corresponding to a second frequency portion, and may determine that the TPMI indicated by the second field corresponds to the same precoder type / rank as the precoder type / rank indicated by the first field. Based on the TPMI indicated by the first field / second field and the determined precoder type / rank, the UE may determine a precoder for PUSCH transmission for each frequency portion.

[0120] <<Embodiment 1-1>> The UE may determine that the TPMI indicated by the second field corresponds to the same precoder type as the TPMI indicated by the first field. Furthermore, the UE may use the same rank as the first / legacy indicator field for the TPMI indicated by the second field (new field), similar to the examples 1 and 2 above.

[0121] In the 2TX / 4TX case, if the first field indicates a non-coherent precoder, the second field also indicates a non-coherent precoder. If the first field indicates a partially coherent precoder, the second field also indicates a partially coherent precoder. If the first field indicates a fully coherent precoder, the second field also indicates a fully coherent precoder.

[0122] Whether the second field uses fully coherent, partially coherent, or non-coherent behavior may be predetermined by higher-layer signaling.

[0123] Figure 11 shows an example of the correspondence of bits in a new field in Embodiment 1-1, with 4TX, fully and partially and non-coherent, and maximum rank = 4.

[0124] If the 6-bit first field indicates "1 layer: TPMI = 0" (non-coherent: NC) (or 1 layer: TPMI = any of 1 to 3), then each subsequent field (the second field...the Nth field) may use only 2 bits to indicate TPMI. The UE may determine that the same precoder as the first field corresponds to each subsequent field.

[0125] If the 6-bit first field indicates "1 layer: TPMI = 4" (partially coherent: PC) (or 1 layer: TPMI = any of 5 to 11), then each subsequent field (the second field...the Nth field) may use only 3 bits to indicate TPMI. The UE may determine that the same precoder as the first field corresponds to each subsequent field.

[0126] If the 6-bit first field indicates "1 layer: TPMI = 16" (FC) (or 1 layer: TPMI = 12-15 or 17-27), then each subsequent field (second field...the Nth field) may use only 4 bits to indicate TPMI. The UE may determine that the same precoder as the first field corresponds to each subsequent field.

[0127] [Specific Example of Option 1] Figure 12 shows the relationship between the bit size of the new field (second field) and the first embodiment when Option 1 is applied. In Figure 11, 4TX, fully and partially and non-coherent, and maximum rank = 4 are applied. As shown in Figure 12, the new field has a smaller bit size than the first field (6 bits), so overhead can be reduced.

[0128] If the DCI bit size supports dynamic scheduling of ranks, each new field may be assigned 4 bits, which is the maximum number of bits for a new field in Figure 11. However, if a specific case is indicated (a case that can be represented with 3 bits or less), the actual number of bits used may be less than 4 bits.

[0129] The UE may transmit capability information indicating whether it supports dynamic scheduling of ranks. The UE may receive settings indicating dynamic scheduling of ranks through upper-layer signaling.

[0130] Variation: Some precoders may be predefined so as not to be indicated by new fields (e.g., 1 layer, FC). For example, if the 1 layer, FC case (4 bits) is defined not to be indicated as a new field, the maximum number of bits for a new field will be 3 bits. This reduces the number of candidate precoders and the bit size, even when supporting dynamic scheduling of ranks.

[0131] For example, to determine the DCI size of a candidate precoder, the precoder type / candidate precoder may be pre-configured by higher-layer signaling (e.g., RRC signaling). The first field may indicate only the configured precoder type / candidate precoder. For example, option A or B below may be applied.

[0132] Option A: The first field may indicate any precoder type (the bit size of the first field is not reduced). Option B: The first field may indicate only the precoder types / candidate precoders that have been set / reported as capability information (the bit size of the first field is reduced).

[0133] <<Embodiment 1-2>> The precoder indicated by the second field (new field) may have the same characteristics as the precoder indicated by the first field (legacy field). The UE may assume / determine that the precoder indicated by the second field has the same characteristics as the precoder indicated by the first field (legacy field). The characteristics may be at least one of the corresponding antenna port, the phase of the corresponding antenna port, rank / layer, and a predetermined range of TPMI / SRI indices.

[0134] <<<Option 1-2-1>>> The precoder indicated by the new field (second field) may correspond to the same range of TPMI indices as the precoder indicated by the first / legacy field.

[0135] For example, if the TPMI index of the precoder indicated by the first field is x, the precoder for the new field may be selected only from the TPMI indices of (x+1, x+2, ..., x+M), or (x, x+1, x+2, ..., x+M-1). M may be a value set / defined by higher-layer signaling (e.g., RRC signaling) and at least one of the specifications. In this case, the bit size of the new field is log ２ It becomes (M) bits.

[0136] Variation 1: The precoder for the new field may be selected only from TPMI indices of the form (x - M / 2, ..., x + M / 2) or (x - M, ..., x - 1, x).

[0137] Variation 2: Option 1-2-1 may be combined with Embodiment 1-1. The precoder indicated by the new field (second field) may correspond to the same precoder type / rank and TPMI index within the same range as the precoder indicated by the first / legacy field.

[0138] For example, by using the mod function (mod(x)), the new field may be limited to the range of a valid TPMI index. The mod function may be applied to the size of the entire TPMI table, or to the size of the TPMI index to which the same precoder type belongs (in the case of variation 2).

[0139] Specific example of Option 1-2-1: A specific example for 4TX, fully and partially and non-coherent, maximum rank = 4, M = 4 is described. When "Layer 1: TPMI = 8" (partially coherent (PC)) is indicated by a first field using the conventional bit size of 6 bits (x = 8), the new field (precoder of the new field) may be selected only from TPMI indices of TPMI = 9, 10, 11, and 12 (Figure 13). Here, TPMI = 12 is not PC, as shown in Figure 1. Therefore, a Mod operation (Mod 8) is performed on TPMI = 12, and the new field is indicated as one of TPMI = 9, 10, 11, or 4, and the same precoder type as the PC precoder type may be used (Figure 14).

[0140] <<<Option 1-2-2>>> In the case of a partially coherent precoder, the antenna port occupied by the precoder for the second field (corresponding to) may be the same as the antenna port occupied by the first field (corresponding to) it. When combined with Examples 1 and 2, the rank / layer of the first and second fields may also be the same.

[0141] For example, in the case of 4TX, if the first field indicates a partial coherent precoder with ports 0 and 2 used, the new field may also indicate a partial coherent precoder with ports 0 and 2 used.

[0142] Specific example of option 1-2-2: A specific example for 4TX, fully and partially and non-coherent, maximum rank = 4, M = 4 is explained. Layer 1: If TPMI = 6 (partially coherent (PC)) is indicated by the first field of 6 bits, the precoder for the new field is indicated from TPMI = 4, 5, 6, 7, which use the same port number (Figure 15). Therefore, the new field requires 2 bits.

[0143] <<<Option 1-2-3>>> In the case of a fully coherent precoder, some (e.g., half) or all of the ports (antenna ports) of the precoder of the second field (new field) may correspond to the same phase as the ports (antenna ports) of the precoder of the first field. When combined with Examples 1 and 2, the rank / layer of the first and second fields may also be the same.

[0144] Specific examples of option 1-2-3: Specific examples for 4TX, fully and partially and non-coherent, maximum rank = 4, M = 4 are described. 1 layer: When TPMI = 20 (fully coherent (FC)) is indicated by a first field using 6 bits, one of the following examples (1) or (2) applies.

[0145] (1) The precoder for the second field may be indicated by TPMI = 12, 14, 16, 18, 20-24, 26. These TPMIs correspond to two ports that have the same phase as the precoder for the first field (Figure 16).

[0146] (2) The precoder for the second field may be indicated from TPMI = 20 to 23, where the phases of port 0 and port 2 are the same as those of the precoder for the first field.

[0147] <<<Option 1-2-4>>> If a precoder is indicated by the first field, the precoders (TPMIs) indicated by each second field may be within the range defined in the specification or within the range set by higher-layer signaling (e.g., RRC signaling) (or may be selected from such ranges). The range of precoders (TPMIs) in the second field may be indicated / selected from a range smaller than the precoders (TPMIs) in the first field.

[0148] According to this embodiment, the new field (TPMI / SRI) (corresponding to option 1 or 2) instructs a narrower range of precoders with a smaller bit size compared to the conventional field (first field). This reduces overhead.

[0149] <<Supplement>> Embodiment 1-1 applies only to 2TX / 4TX and does not necessarily apply to 8TX. For 8TX, separate TPMI tables for NC / PC / FC precoders may be applied.

[0150] Embodiments 1-2 may be applicable to both 2TX / 4TX and 8TX. UE capabilities for different UL transmission counts / different codebook types may be defined separately or as a single UE capability.

[0151] In the first embodiment, the number of candidate SRI instructions (in bits) for new fields can also be reduced for SRI instructions for the non-code book PUSCH based on predefined rules or higher-layer signaling (RRC signaling). For example, based on a first SRI field / index [combination] indicated by DCI, X SRS resources may be selected from the indicated new SRI field within a specific instruction offset range (similar to options 1-2-1 to 1-2-3). In other words, TPMI in the first embodiment may be reinterpreted as SRI.

[0152] Channel variations between different sub-bands may not be large enough to require completely flexible instructions for all candidate pre-coders. Therefore, an overhead reduction method such as that of the first embodiment becomes possible. For example, when a pre-coder for the first sub-band or wideband is selected, the pre-coders for other sub-bands may have the same characteristics as the pre-coder for the first sub-band or wideband.

[0153] <<Second Embodiment>> In Option 2 of FIG. 8, the legacy TPMI field (first field) indicates a wideband pre-coder. The new TPMI field (second field) for each frequency portion has the same rank as the wideband pre-coder indicated by the first field and indicates a phase shift or delta pre-coder from the wideband pre-coder.

[0154] <<Phase Shift>> Two phase shift values of n = {0, 1} may be indicated for φ ｎ = e ｊπｎ by a 1-bit field. Alternatively, four phase shift values of n = {0, 1, 2, 3} may be indicated for φ ｎ = e ｊπｎ／２ by a 2-bit field. Alternatively, even more bits may be used. The bit size of the field for each frequency portion for indicating the phase shift may be the same or different for different ranks.

[0155] A one-layer wideband pre-coder W1 and the corresponding sub-band pre-coder S1 are represented as follows.

[0156]

[0157] A two-layer wideband pre-coder W2 and the corresponding sub-band pre-coder S2 are represented as follows.

[0158]

[0159] Similarly, in the case of three layers, four layers, or j layers, the co-phasing applied to each layer is φ ｎ or -φ ｎThis is pre-configured. In the example above, it is assumed that phase adjustment is applied to the last half of all ports. Alternatively, phase adjustment may be applied to any half of all ports. For example, of the 4TX ports 0, 1, 2, and 3, phase adjustment may be applied to ports 1 and 3.

[0160] <<Delta Precoder>> A delta precoder can also be represented by, for example, the following equation P, where B is a matrix of all ones.

[0161]

[0162] The precoder for each subband is P （ＴＸ　ｘ　ＴＸ） *This will be wideband_precoder(TX x layer).

[0163] <<Other>> The precoder of this embodiment may be applied only to a fully coherent precoder. Alternatively, it may be applied to both a fully coherent precoder and a partially coherent precoder. In the case of a partially coherent precoder, phase adjustment may be applied to some (e.g., half) of the selected ports (e.g., non-zero values). For example, if the broadband precoder W3 shown in the following equation is selected, phase adjustment may be applied only to port 2 (W3 Ｃ ).

[0164]

[0165] <<Variations>> Combinations of the first and second embodiments may be possible. Different interpretations may be applied to multiple fields [sets] of DCI for different precoder types.

[0166] For example, the DCI field may be interpreted as the second field of the second embodiment (indicating a phase-shift precoder or delta precoder) when a fully coherent / partially coherent precoder is selected, and as the second field of the first embodiment when a non-coherent / partially coherent precoder is selected.

[0167] When a combination of the first and second embodiments is applied, option 2 in Figure 8 may also be applied.

[0168] <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.

[0169] 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.

[0170] 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.

[0171] Furthermore, notification of any information to the UE in the above-described embodiment may be periodic, semi-persistent (triggered by instructions from the UE or gNB), or aperiodic (triggered by instructions from the UE or gNB).

[0172] In the embodiments described above, the UE may receive information from the NW as at least one of the following QCL rules: • QCL type A. • QCL type B. • QCL type C. • QCL type D.

[0173] In the embodiments described above, the QCL source RS for each QCL type may be at least one of the following RSs: • SSB; • CSI-RS with / without repetition; • TRS; • DMRS for PDCCH / PDSCH.

[0174] In the embodiments described above, information from the network may be set / instructed by the following methods: - Common to multiple UEs, or individual to a UE. - Cell-specific, or common to multiple cells. - Per UE / Per CC / Per BWP / Per band / Per cell / Per cell group (CG).

[0175] <<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.

[0176] 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.

[0177] If the above notice is made by the UCI, the notice may be transmitted using PUCCH or PUSCH.

[0178] Furthermore, the notification of any information from the UE in the above-described embodiment may be periodic, semi-persistent (triggered by instructions from the UE or gNB), or aperiodic (triggered by instructions from the UE or gNB).

[0179] <<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.

[0180] The above-mentioned specific UE capabilities may include at least one of the following: supporting the above-mentioned specific processing / operation / control / assumption / information; supporting UL subband precoding; supporting UL subband precoding for codebook-based PUSCH; supporting UL subband precoding for non-codebook-based PUSCH; and supporting TPMI / SRI indication for each frequency portion.

[0181] In this disclosure, "to support" and "whether or not to support" may be interpreted interchangeably.

[0182] 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).

[0183] 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)).

[0184] If the above conditions are not met, UE / BS may follow the behavior specified in existing 3GPP releases.

[0185] (Note) The following invention is added with respect to one embodiment of the present disclosure (the case of TPMI). [Note 1] A terminal having: a receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency portion and indicating a Transmitted Precoding Matrix Indicator (TPMI) and a second field corresponding to a second frequency portion and indicating a TPMI; and a control unit that determines that the TPMI indicated by the second field corresponds to the same precoder type or rank as the first field. [Note 2] The terminal according to Note 1, wherein the control unit determines that the precoder indicated by the second field has the same characteristics as the precoder indicated by the first field, and the characteristics are the corresponding antenna port, the phase of the corresponding antenna port, or the range of the corresponding TPMI index. [Note 3] The terminal according to Note 1 or Note 2, wherein the TPMI indicated by the second field is included in the range set by upper layer signaling. [Note 4] The terminal described in any of Notes 1 to 3, wherein the first field indicates a broadband precoder, and the second field indicates a phase shift or delta precoder from the broadband precoder.

[0186] (Note) The following inventions are added with respect to one embodiment of the present disclosure (the case of SRI). [Note 1] A terminal having: a receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency portion and indicating an SRS Resource Indicator (SRI) and a second field corresponding to a second frequency portion and indicating an SRI; and a control unit that determines that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field. [Note 2] The terminal according to Note 1, wherein the control unit determines that the precoder indicated by the second field has the same characteristics as the precoder indicated by the first field, and the characteristics are the range of the corresponding antenna port, the phase of the corresponding antenna port, or the range of the corresponding TPMI index. [Note 3] The terminal according to Note 1 or Note 2, wherein the SRI indicated by the second field is included in the range set by upper layer signaling. [Note 4] The terminal described in any of Notes 1 to 3, wherein the first field indicates a broadband precoder, and the second field indicates a phase shift or delta precoder from the broadband precoder.

[0187] (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.

[0188] Figure 17 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).

[0189] 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.

[0190] 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.

[0191] 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))).

[0192] 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.

[0193] 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.

[0194] 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).

[0195] 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.

[0196] Furthermore, the user terminal 20 may communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0197] 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.

[0198] 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.

[0199] 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.

[0200] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0201] 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).

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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).

[0215] (Base Station) Figure 18 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.

[0216] 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.

[0217] 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.

[0218] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 120, transmitting / receiving antenna 130, and transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of wireless resources, etc.

[0219] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0220] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0221] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0222] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0223] The transmitting / receiving unit 120 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.

[0224] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), to generate a bit sequence to be transmitted.

[0225] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0226] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0227] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0228] The transmitting / receiving unit 120 (receiving 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 (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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] 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.

[0233] 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.

[0234] The transmitting / receiving unit 120 may transmit a DCI that includes a first field corresponding to a first frequency portion and indicating TPMI, and a second field corresponding to a second frequency portion and indicating TPMI.

[0235] The control unit 110 may control the reception of PUSCH using a precoder determined by the TPMI indicated by the first field and the TPMI indicated by the second field.

[0236] The TPMI indicated by the second field may correspond to the same precoder type or rank as the first field.

[0237] The transmitting / receiving unit 120 may transmit a DCI that includes a first field corresponding to a first frequency portion and indicating SRI, and a second field corresponding to a second frequency portion and indicating SRI.

[0238] The control unit 110 may control the reception of PUSCH using a precoder determined by the SRI indicated by the first field and the SRI indicated by the second field.

[0239] The SRI indicated by the second field may correspond to the same precoder type or rank as the first field.

[0240] (User Terminal) Figure 19 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] 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.

[0255] 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.

[0256] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may be, for example, Non Zero Power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may be at least one of the following: NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc. CSI-IM may also be called CSI-Interference Management (IM), and may be interpreted interchangeably with Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., may be interpreted interchangeably.

[0257] In this disclosure, the transmitting unit and receiving unit of the user terminal 20 may be composed of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0258] The transmitting / receiving unit 220 may perform at least some of the processing of the transmitting / receiving unit described in the appendix above.

[0259] The control unit 210 may perform at least some of the processing of the control unit described in the appendix above.

[0260] (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.

[0261] 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.

[0262] 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 20 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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.

[0269] 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.

[0270] 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).

[0271] 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).

[0272] 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.

[0273] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0274] 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.

[0275] (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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0290] 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.

[0291] 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.

[0292] 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.

[0293] 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".

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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).

[0303] 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 notifying the specified information or by notifying other information).

[0304] 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).

[0305] 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.

[0306] 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.

[0307] 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).

[0308] 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,” “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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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.

[0319] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0320] 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.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] Figure 21 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.

[0325] 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.

[0326] 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).

[0327] 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.

[0328] 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.

[0329] 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.).

[0330] 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.

[0331] 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.

[0332] 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).

[0333] 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.

[0334] 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).

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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).

[0341] 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."

[0342] 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.

[0343] 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.

[0344] 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).

[0345] 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.

[0346] 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….”

[0347] 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).

[0348] 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.

[0349] 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.”

[0350] 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.

[0351] 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."

[0352] 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.

[0353] 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.

[0354] 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").

[0355] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] This application is based on Japanese Patent Application No. 2024-228025, filed on December 24, 2024. All of its contents are included herein.

Claims

A receiving unit that receives Downlink Control Information (DCI) including a first field corresponding to a first frequency portion and indicating an SRS Resource Indicator (SRI), and a second field corresponding to a second frequency portion and indicating an SRI, A control unit that determines that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field, A terminal. 　 The control unit determines that the precoder indicated by the second field has the same characteristics as the precoder indicated by the first field, The aforementioned features are the corresponding antenna port, the phase of the corresponding antenna port, or the range of the corresponding TPMI index. The terminal according to claim 1. 　 The SRI indicated by the second field is included in the range set by upper-layer signaling. The terminal according to claim 1. 　 The first field represents a broadband precoder, and the second field represents a phase shift or delta precoder from the broadband precoder. The terminal according to claim 1. 　 A step of receiving Downlink Control Information (DCI) which includes a first field corresponding to a first frequency portion and indicating an SRS Resource Indicator (SRI) and a second field corresponding to a second frequency portion and indicating an SRI, A step of determining that the SRI indicated by the second field corresponds to the same precoder type or rank as the first field, A wireless communication method for a terminal having [a certain feature]. 　 A transmitting unit that transmits Downlink Control Information (DCI) including a first field corresponding to a first frequency portion and indicating an SRS Resource Indicator (SRI), and a second field corresponding to a second frequency portion and indicating an SRI, The system includes a control unit that controls the reception of a Physical Uplink Shared Channel (PUSCH) using a precoder determined by the SRI indicated by the first field and the SRI indicated by the second field, The SRI indicated by the second field corresponds to the same precoder type or rank as the first field. Base station.

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