Terminal, radio communication method, and base station

Abstract

To appropriately perform beam reporting.SOLUTION: A terminal according to an aspect of the present disclosure has: a control section that, on the basis of a specific parameter indicating the number of resource groups reported in every channel state information (CSI) report for a report of beam combination in every resource group for simultaneous transmission (STxMP) using a plurality of panels, performs control to report one or more resource groups in one CSI report; and a transmission section that performs simultaneous transmission of a plurality of beams corresponding to the plurality of resources included in each of the one or more resource groups.SELECTED DRAWING: Figure 5

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later) are also being considered. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In future wireless communication systems (e.g., Rel. 18 and later), it is being considered that a terminal (user terminal, User Equipment (UE)) will report beam combinations for each resource group for simultaneous transmission with multi-panel (STxMP) (also referred to as group-based beam reporting). Group-based beam reporting for STxMP is a function that allows a UE to report pairs / combinations of UL beams that can be used for simultaneous uplink (UL) transmission in UL multi-panel transmission (UL transmission using multiple panels). Note that group-based beam reporting for STxMP may also be used to report pairs / combinations of DL beams that can be used for simultaneous downlink (DL) reception by a UE.

[0006] However, it is unclear how to configure the number of resource groups that a UE reports for group-based beam reporting for STxMP. In this case, beam reporting may not be performed appropriately, which may result in a deterioration of communication quality.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform beam reporting. [Means for solving the problem]

[0008] A terminal according to one embodiment of the present disclosure is characterized by having a control unit that controls reporting of one or more resource groups in one channel state information (CSI) report based on a specific parameter indicating the number of resource groups to be reported per CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP), and a transmission unit that performs simultaneous transmission of multiple beams corresponding to multiple resources included in each of the one or more resource groups. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, beam reporting can be performed appropriately. [Brief explanation of the drawings]

[0010] [Figure 1] 1A-1C are diagrams illustrating an example of multi-panel transmission. [Figure 2] 2A-2D are diagrams illustrating an example of a single DCI-based STxMP. [Figure 3] 3A and 3B are diagrams illustrating an example of a single DCI-based STxMP. [Figure 4] 4A-4C are diagrams illustrating an example of multi-DCI-based STxMP. [Figure 5] FIG. 5 is a diagram illustrating an example of group-based beam reporting for STxMP. [Figure 6] FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is a diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. [Figure 9] FIG. 9 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] (CSI report) In NR, a UE measures a channel state using a predetermined reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to a base station.

[0012] The UE may measure the channel state using a Channel State Information-Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.

[0013] The CSI-RS resources may include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (IM). An SS / PBCH block is a block including a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)) and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB). An SSB index may be assigned to the time position of the SSB within a half-frame.

[0014] The CSI may include at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS / PBCH block resource indicator (SS / PBCH block indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), a Layer 1 (L1)-Reference Signal Received Power (RSRP), a L1-Reference Signal Received Quality (RSRQ), a L1-Signal to Interference plus Noise Ratio (SINR), a L1-Signal to Noise Ratio (SNR), and the like.

[0015] The UE may be notified of information related to CSI reporting (which may be referred to as CSI reporting configuration information) using higher layer signaling, physical layer signaling (e.g., Downlink Control Information (DCI)), or a combination thereof. The CSI reporting configuration information may be configured using, for example, the RRC information element "CSI-ReportConfig."

[0016] The CSI reporting configuration information may include, for example, information regarding a reporting period, an offset, etc., which may be expressed in a predetermined time unit (e.g., slot unit, subframe unit, symbol unit, etc.). The CSI reporting configuration information may include a configuration ID (CSI-ReportConfigId). The configuration ID may identify parameters such as the type of CSI reporting method (e.g., whether it is SP-CSI or not), the reporting period, etc. The CSI reporting configuration information may include information (CSI-ResourceConfigId) indicating which signal (or which signal resource) is used to report the measured CSI.

[0017] (Beam Management) In Rel-15 NR, a beam management (BM) method has been studied. In this beam management, beam selection is performed based on the L1-RSRP reported by the UE. Changing (switching) the beam of a certain signal / channel may correspond to changing the (Transmission Configuration Indication state) of the signal / channel.

[0018] The beam selected by beam selection may be a transmission beam (Tx beam) or a reception beam (Rx beam). Also, the beam selected by beam selection may be a beam of the UE or a beam of the base station.

[0019] The UE may report (transmit) measurement results for beam management using the PUCCH or PUSCH. The measurement results may be CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, L1-SNR, etc. The measurement results may also be called beam measurements, beam measurement results, beam reports, beam measurement reports, etc.

[0020] The CSI measurement for the beam report may include interference measurement. The UE may measure channel quality, interference, etc. using resources for CSI measurement and derive a beam report. The resources for CSI measurement may be, for example, at least one of resources of SS / PBCH blocks, resources of CSI-RS, other reference signal resources, etc. Configuration information for CSI measurement reporting may be configured in the UE using higher layer signaling.

[0021] The beam report may include at least one of channel quality measurement and interference measurement results. The channel quality measurement results may include, for example, L1-RSRP. The interference measurement results may include L1-SINR, L1-SNR, L1-RSRQ, or other interference-related metrics (e.g., any metrics other than L1-RSRP).

[0022] Note that resources for CSI measurement for beam management may be referred to as beam measurement resources. Furthermore, signals / channels for which the CSI is measured may be referred to as beam measurement signals. Furthermore, CSI measurement / reporting may be interpreted as at least one of measurement / reporting for beam management, beam measurement / reporting, radio link quality measurement / reporting, etc.

[0023] The CSI reporting configuration information that takes into account current NR beam management is included in the RRC information element "CSI-ReportConfig." The information in the RRC information element "CSI-ReportConfig" is explained below.

[0024] The CSI reporting configuration information (CSI-ReportConfig) may include reporting quantity information ("report quantity", which may be expressed as the RRC parameter "reportQuantity"), which is information on parameters to be reported. The reporting quantity information is defined as an ASN.1 object type called "choice type". Therefore, one of the parameters (cri-RSRP, ssb-Index-RSRP, etc.) defined as the reporting quantity information is set.

[0025] A UE in which an upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "groupBasedBeamReporting" related to group-based beam reporting) is set to disabled may include in a beam report (one report instance) for each report setting, different numbers of beam measurement resource IDs (e.g., SSBRI, CRI) for the upper layer parameter included in the CSI reporting configuration information (e.g., the RRC parameter "nrofReportedRS" indicating the number of RSs to be reported) and measurement results (e.g., L1-RSRP) corresponding to each ID.

[0026] A UE with an upper layer parameter (e.g., an RRC parameter "groupBasedBeamReporting") included in the CSI reporting configuration information set to enabled reports CRI / SSBRI (e.g., one group of CRI / SSBRI) on a group-by-group basis for each reporting configuration. The group includes multiple (e.g., two) CRI / SSBRI. This may mean that the multiple (e.g., two) CRI / SSBRI are received simultaneously by the UE.

[0027] For example, a UE that has enabled a higher layer parameter (e.g., an RRC parameter "groupBasedBeamReporting") included in the CSI reporting configuration information may include, for each reporting configuration, two different beam measurement resource IDs (e.g., CRI / SSBRI) and two measurement results (e.g., L1-RSRP) corresponding to the respective IDs in a beam report. The two beam measurement resources (CSI-RS resource, SSB resource) may be received simultaneously by the UE using one spatial domain receive filter or multiple simultaneous spatial domain receive filters.

[0028] (Extended Group-Based Beam Report) For future wireless communication systems (e.g., Rel. 17 and later), beam management-related extensions (e.g., beam reports suitable for multiple TRPs, which may also be called extended group-based beam reports) for user terminals (user equipment (UE)) with multiple panels (multi-panels) and multiple transmission / reception points (multi-TRPs)) are being considered.

[0029] The above-mentioned groupBasedBeamReporting can report one group including multiple (e.g., two) CRI / SSBRIs in one report, and is therefore suitable for cases where multi-TRP transmission, multi-panel reception, etc. are applied. For example, it can be used to report the best beam for TRP1 as RSRP#1 and the best beam for TRP2 as differential RSRP#2.

[0030] In Rel. 15 and 16, a UE with group-based beam reporting enabled can only report one group containing two different CRI / SSBRI (which may be read as beam index) for each reporting configuration. Therefore, it is expected that the number of groups that can be reported by group-based beam reporting will be expanded for Rel. 17.

[0031] For example, two resource sets (e.g., CMR sets) for channel measurement may be configured / triggered to periodic / semi-persistent / aperiodic resource types. The two resource sets (e.g., CMR sets) for channel measurement may be, for example, two CSI-SSB resource sets / two NZP-CSI-RS resource sets. The UE may be configured to be able to report up to four CRI / SSBRI groups. Note that the number of groups that can be reported (or the number of candidates (1 / 2 / 3 / 4)) may be configured by higher layer parameters.

[0032] Each group may have multiple (e.g., two) CRIs / SSBRIs, and the CRIs / SSBRIs in each group may be selected from two CSI resource sets for reporting settings, respectively. The two CRIs / SSBRIs in each group may also mean that the UE can receive simultaneously (e.g., simultaneously using one spatial domain receive filter).

[0033] A CSI report may include up to X (e.g., X=4) resource groups, and each group may include multiple (e.g., two) CRIs / SSBRIs.

[0034] (Multi-panel transmission) In Rel.18 and later, in order to improve UL throughput / reliability, support for simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (or STxMP)) for one or more TRPs is being considered. Also, multi-panel UL transmission schemes are being considered for specific UL channels (e.g., PUSCH / PUCCH).

[0035] For example, a maximum of X panels (e.g., X=2) and a maximum of Y panels (e.g., Y=2) may be supported for multi-panel UL transmission. Note that the values ​​of X and Y are not limited to these. In multi-panel UL transmission, if UL precoding instruction for PUSCH is supported, a codebook of an existing system (e.g., Rel. 16 or earlier) may be supported for simultaneous multi-panel transmission. Considering multi-TRP operation based on single DCI and multi-DCI, the number of layers may be up to x (e.g., x=4) in all panels, and the number of codewords (CWs) may be up to y (e.g., y=2) in all panels. Note that the values ​​of x and y are not limited to these.

[0036] At least one of the following methods 1 to 3 (multi-panel UL transmission methods 1 to 3) is being considered as a multi-panel UL transmission method or candidate multi-panel UL transmission method. Only one of transmission methods 1 to 3 may be supported. Multiple methods including at least one of transmission methods 1 to 3 may be supported, and one of the multiple transmission methods may be configured in the UE.

[0037] <Transmission method 1: Coherent multi-panel UL transmission> Multiple panels may be synchronized with each other. All layers are mapped to all panels. Multiple analog beams may be directed. The SRS Resource Indicator (SRI) field may be extended. This scheme may use up to 4 layers for the UL.

[0038] In the example of FIG. 1A, the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH(1, 2, ..., L)) and transmits the L layers from each of two panels. Panels #1 and #2 are coherent. Transmission method 1 can obtain diversity gain. The total number of layers in the two panels is 2L. If the maximum total number of layers is 4, the maximum number of layers in one panel is 2.

[0039] <Transmission method 2: Non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB)> Multiple panels may not be synchronized. Different layers are mapped to one CW or TB for different panels and PUSCHs from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels. This transmission scheme may use up to four layers or up to eight layers for the UL. If up to eight layers are supported, this transmission scheme may support one CW or TB using up to eight layers.

[0040] In the example of FIG. 1B, the UE maps 1 CW or 1 TB to k layers (PUSCH(1, 2, ..., k)) and Lk layers (PUSCH(k+1, k+2, ..., L)), transmits the k layers from panel #1, and transmits the Lk layers from panel #2. Transmission scheme 2 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0041] <Transmission method 3: Two CW or TB non-coherent multi-panel UL transmissions> Multiple panels may not be synchronized. Different layers are mapped to different panels and two CWs or TBs for PUSCHs from multiple panels. A layer corresponding to one CW or TB may be mapped to one panel. Layers corresponding to multiple CWs or TBs may be mapped to different panels. This transmission scheme may use up to four layers or up to eight layers for the UL. When supporting up to eight layers, this transmission scheme may support up to four layers per CW or TB.

[0042] In the example of FIG. 1C, the UE maps CW#1 or TB#1 of the 2CWs or 2TBs to k layers (PUSCH(1, 2, ..., k)), maps CW#2 or TB#2 to Lk layers (PUSCH(k+1, k+2, ..., L)), transmits k layers from panel#1, and transmits Lk layers from panel#2. Transmission scheme 3 can obtain gains through multiplexing and diversity. The total number of layers in the two panels is L.

[0043] In each of the above transmission schemes, the base station may configure or indicate panel-specific transmission for UL transmission using UL TCI or Panel ID. UL TCI (UL TCI state) may be based on signaling similar to DL beam indication supported in Rel. 15. Panel ID may be implicitly or explicitly applied to transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. When Panel ID is explicitly signaled, it may be configured in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).

[0044] (Simultaneous multi-panel transmission) In Rel. 18 and later, in one or more of the above-mentioned transmission methods / modes, multi-panel UL transmission (e.g., Simultaneous Transmission across Multiple Panels (STxMP)) for scheduling PUSCH based on one DCI (single DCI) / scheduling PUSCH based on multiple DCIs (multiple DCI) is being considered.

[0045] For example, in Rel.18, the following STxMPs are expected to be supported: Single DCI PUSCH SDM scheme. Single DCI PUSCH SFN scheme. Single DCI PUCCH SFN scheme. Multi-DCI overlapping PUSCH+PUSCH scheme.

[0046] <Single DCI-based STxMP> In Rel. 18 and later, a UE with multiple panels (e.g., Panel #1 and Panel #2) may support simultaneous multi-panel transmission (STxMP) in a single DCI-based multi-TRP system (see Figure 2A). In single DCI-based STxMP, the following scheme may be applied for UL transmission (e.g., PUSCH, PUCCH, or PUSCH+PUCCH).

[0047] Space Division Multiplexing (SDM) (PUSCH): Different layers / DMRS ports of one PUSCH are precoded separately and transmitted simultaneously from different UE panels / beams (see Figure 2B). Single Frequency Network (SFN)-based transmission scheme (PUSCH): All layers / DMRS ports of one PUSCH are transmitted simultaneously from two different UE panels / beams (see Figure 2C). · Single Frequency Network (SFN) based transmission method (PUCCH): One PUCCH is transmitted simultaneously from different panels (see Figure 2D).

[0048] Figure 2B shows an example of a case where the SDM scheme for a single DCI-based PUSCH is applied. The UE may assume that repeated SDM PUSCH transmissions are scheduled on the same time and frequency resources. That is, when using coherent panels, the UE may transmit repeated SDM PUSCH transmissions on the same time and frequency resources. Figure 2B shows a case where the time and frequency resources of Layer #1 and Layer #2 corresponding to the PUSCH are the same.

[0049] 2B may be applied to a case where SDM is applied to one CW (or TB), or may be applied to a case where SDM is applied to two CWs (or TBs). When SDM is applied to two CWs, two CWs simultaneously transmitted from two different panels are spatially multiplexed.

[0050] Figure 2C shows an example of applying an SFN-based transmission scheme for a single DCI-based PUSCH. In SFN, a UE transmits the same signal to the same RE from panels corresponding to different TCI states (e.g., joint / UL TCI states). Here, all layers (e.g., layers #1 and #2) / DMRS ports of one PUSCH are simultaneously transmitted from two different UE panels (e.g., panel #1 and panel #2).

[0051] 2D shows an example of a single DCI-based PUCCH SFN-based transmission scheme, in which one PUCCH is simultaneously transmitted from different panels (e.g., panel #1 and panel #2).

[0052] In the SDM / SFN scheme of the single DCI-based PUSCH, multiple (eg, two) SRS resource sets may be configured and multiple (eg, two) SRI / TPMI fields may be indicated.

[0053] In the single DCI-based PUCCH SFN scheme, multiple (eg, two) TCI states may be applied to one PUCCH resource.

[0054] <Multi-DCI based STxMP> In Rel. 18 and later, a UE with multiple panels (e.g., Panel #1 and Panel #2) may support simultaneous multi-panel transmission (STxMP) in a multi-DCI-based multi-TRP system (see Figure 3A). In multi-DCI-based STxMP, simultaneous transmission of UL channels / signals (e.g., PUSCH+PUSCH) may be supported (see Figure 3B). For example, two PUSCHs that overlap in the time domain are associated with different TRPs and transmitted simultaneously from different UE panels / beams.

[0055] A UE may simultaneously transmit two independent PUSCHs associated with different TRPs in the same active BWP. The total number of layers corresponding to the two independent PUSCHs may be specified as a maximum of X (or less than or equal to X). X may be, for example, 4 or some other value. The maximum number of layers for each of the two PUSCHs may be X / 2 (for example, 2) or some other value. Furthermore, the two independent PUSCHs may be associated with different CORESET pool indices.

[0056] In the multi-DCI-based PUSCH+PUSCH, multiple (for example, two) SRS resource sets may be configured, and the two SRS resource sets may be associated with different (for example, two) CORESET pool indices, respectively.

[0057] In Rel. 18, simultaneous transmission of PUSCHs (e.g., PUSCH+PUSCH scheme) is supported as multi-DCI-based STxMP. Furthermore, in Rel. 19 and later, simultaneous transmission including an uplink control channel (e.g., PUCCH) (e.g., STxMP PUCCH+PUCCH, STxMP PUCCH+PUSCH) is also expected to be supported as multi-DCI-based STxMP.

[0058] FIG. 4A shows an example of multi-DCI-based STxMP PUSCH+PUSCH, FIG. 4B shows an example of multi-DCI-based STxMP PUCCH+PUCCH, and FIG. 4C shows an example of multi-DCI-based STxMP PUCCH+PUSCH.

[0059] In STxMP PUSCH+PUSCH (see FIG. 4A), two PUSCHs are associated with different TRPs and transmitted simultaneously from a UE panel. The two PUSCHs may be partially / fully overlapping in the time domain and partially / fully / non-overlapping in the frequency domain. TRP may also be interpreted as panel, CORESET pool index, SRS resource set, SSB group, CSI-RS group, TCI state, or group of TCI states.

[0060] In STxMP PUCCH+PUCCH (see Figure 4B), two PUCCHs associated with different TRPs are transmitted simultaneously from the UE panel, and the two PUCCHs may be partially / fully overlapping in the time domain and partially / fully / non-overlapping in the frequency domain.

[0061] In STxMP PUCCH+PUSCH (see Figure 4C), one PUCCH and one PUSCH are associated with different TRPs and transmitted simultaneously from the UE panel, and the one PUCCH and one PUSCH may be partially / fully overlapping in the time domain and partially / fully / non-overlapping in the frequency domain.

[0062] Prior to Rel. 17 (e.g., STxMP PUCCH+PUCCH in Figure 4B and STxMP PUCCH+PUSCH in Figure 4C are not supported), UE operations to resolve overlap between PUCCH and other UL channels / signals (e.g., PUCCH-PUCCH, PUCCH-PUSCH) are supported.

[0063] For example, when a PUCCH overlaps with another UL channel / signal, the UE multiplexes UCIs of multiple PUCCH transmissions into one PUCCH resource, multiplexes UCIs of PUCCH transmissions into PUSCH transmissions, or drops the PUCCH / PUSCH transmission. The UL channel on which the UCI is multiplexed / dropped may be determined based on predetermined criteria (e.g., UCI type, priority index of PUCCH / PUSCH, etc.).

[0064] (analysis) As mentioned above, group-based beam reporting is specified in specifications up to Rel. 17. Group-based beam reporting in specifications up to Rel. 17 is a function for UE to report pairs / combinations of DL beams that can be simultaneously received in DL multi-TRP reception (DL reception from multiple TRPs).

[0065] In addition, group-based beam reporting for simultaneous transmission with multi-panel (STxMP) is being considered for specifications from Rel. 18 onwards. Group-based beam reporting for STxMP is a function for UEs to report pairs / combinations of UL beams that can be used for simultaneous UL transmission in UL multi-panel transmission (UL transmission using multiple panels). Note that group-based beam reporting for STxMP may also be used to report pairs / combinations of DL beams that can be used for simultaneous DL reception by UEs.

[0066] Here, it is not clear how to configure the number of resource groups that a UE reports for group-based beam reporting for STxMP.

[0067] For example, the existing Rel.18 specifies the following example: Example If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', or 'ssb-Index-RSRP-Index', If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to JointULandDL, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r18, the UE reports, within a single reporting instance, nrofReportedGroups-r18 groups of two CSI-RS or SSBRIs, each selecting one CSI-RS or SSB from each of the two CSI resource sets for each reporting setting. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. Furthermore, the CSI-RS / SSB resources in each group can be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to UL only, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r18, the UE reports two nrofReportedGroups-r18 groups of CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities.

[0068] In the above example, nrofReportedGroups-r18 is a parameter that does not actually exist, so the UE cannot perform group-based beam reporting for STxMP in the existing specifications.

[0069] As such, if the method for setting the number of resource groups reported by the UE for group-based beam reporting for STxMP is not clear, beam reporting may not be performed appropriately, which may result in a deterioration in communication quality.

[0070] Therefore, the present inventors have conceived the following embodiment: According to one aspect of the present disclosure, beam reporting can be performed appropriately.

[0071] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the respective embodiments may be applied independently or in combination. The present disclosure also provides embodiments in which part or all of one embodiment is combined with part or all of another embodiment.

[0072] (Various reading changes) In this disclosure, words enclosed in "()" in a sentence may indicate an explanation of the immediately preceding wording (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Also, in this disclosure, words enclosed in "[ ]" in a sentence may be interpreted including the meaning of the entire sentence, or may be interpreted excluding the meaning of the entire sentence (ignoring the meaning of the entire sentence). Note that "()" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0073] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0074] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be interchangeable. In the present disclosure, terms such as support, control, controllable, operate, and operate may be interchangeable.

[0075] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0076] In the present disclosure, signaling, message, field, parameter, information, payload, etc. may be read interchangeably.

[0077] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, Non-Access Stratum (NAS) signaling (of the control plane), other messages (e.g., messages communicated to and from the core network, such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0078] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0079] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0080] In the present disclosure, CSI, CSI report, CSI report, beam report, beam report, report instance, report, report, etc. may be read interchangeably.

[0081] In the present disclosure, beam, UL beam / DL beam, RS, RS resource, RS index, TRP, [transmit / receive] panel, TCI state, spatial relationship, CSI-RS, CSI-RS resource, CRI, SSB, SSB resource, SSBRI, beam measurement resource, beam measurement resource ID, resource, etc. may be read interchangeably.

[0082] In the present disclosure, a resource group, a group, a plurality of CRI / SSBRIs, a pair of CRI / SSBRIs, a combination of CRI / SSBRIs, a set of CRI / SSBRIs, etc. may be read interchangeably.

[0083] In the present disclosure, group-based beam reporting, beam reporting per resource group, beam pair reporting per resource group, beam combination reporting per resource group, beam set reporting per resource group, etc. may be read interchangeably.

[0084] In this disclosure, a higher layer parameter without a suffix may refer to a higher layer parameter of any release. In this disclosure, a higher layer parameter with a -rXX suffix may refer to a higher layer parameter defined in (supported by) a UE / BS in Rel.XX [or later].

[0085] (Wireless communication method) <Embodiment> A UE / base station (BS) may receive / transmit an upper layer parameter (hereinafter also referred to as the first parameter) indicating the number of resource groups to be reported per CSI report for group-based beam reporting in Rel. 18 [or later] (see FIG. 5). In this disclosure, group-based beam reporting in Rel. 18 [or later], group-based beam reporting for STxMP (for STxMP), reporting of pairs / combinations of UL beams / DL beams that can be transmitted / received simultaneously [per resource group], etc. may be interpreted interchangeably.

[0086] Each resource group may include multiple (e.g., two) CRI / SSBRIs, and each CRI / SSBRI may correspond to one beam.

[0087] The value of the first parameter (e.g., nX) may represent an integer equal to or greater than 1. For example, the value n1 of the first parameter may mean that the number of resource groups reported per CSI report is 1, the value n2 of the first parameter may mean that the number of resource groups reported per CSI report is 2, ..., the value nX of the first parameter may mean that the number of resource groups reported per CSI report is X.

[0088] The UE may report nX resource groups, each including multiple (eg, two) CRIs / SSBRIs, in one CSI report based on the first parameter (see FIG. 5).

[0089] The UE may simultaneously transmit / receive pairs / combinations of beams included in each of the nX resource groups within the above-mentioned single CSI report (i.e., multiple CRIs / SSBRIs [corresponding beams] included in each of the nX resource groups) (see Figure 5).

[0090] For the first parameter, at least one of the following options 1 and 2 may be applied:

[0091] <<Option 1>> As the first parameter, a new upper layer parameter (e.g., nrofReportedGroups-r18, which may also be referred to as an upper layer parameter for group-based beam reporting in Rel. 18 [and later], an upper layer parameter dedicated to group-based beam reporting in Rel. 18 [and later], etc.) may be defined.

[0092] In this case, the value of the first parameter may be any one of {n1, n2, n3, n4}, or may be another value (for example, nY, where Y is an integer of 5 or more).

[0093] If option 1 applies, the following example may be specified in the specification: Example If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', or 'ssb-Index-RSRP-Index', -◆If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'disabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports nrofReportedRS (configured by higher layers) different CRIs or SSBRIs for each reporting setting within a single reporting instance. If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'enabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports two different CRIs or SSBRIs for each reporting setting within a single reporting instance. CSI-RS / SSB resources can be received simultaneously by the UE using either a single spatial domain receive filter or multiple simultaneous spatial domain receive filters. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r17, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and if the UE is configured with nrofReportedGroups[-r17], it reports in a single reporting instance two nrofReportedGroups[-r17] groups of CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of two CSI resource sets for each reporting setting. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to JointULandDL, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r18, the UE reports, within a single reporting instance, nrofReportedGroups-r18 groups of two CSI-RS or SSBRIs, each selecting one CSI-RS or SSB from each of the two CSI resource sets for each reporting setting. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. Furthermore, the CSI-RS / SSB resources in each group can be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to UL only, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r18, the UE reports two nrofReportedGroups-r18 groups of CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities.

[0094] In the above example, nrofReportedGroups[-r17] may be referred to as an upper layer parameter for group-based beam reporting in Rel. 17, an upper layer parameter dedicated to group-based beam reporting in Rel. 17, etc. In the present disclosure, group-based beam reporting in Rel. 17, reporting of pairs / combinations of DL beams that can be received simultaneously [per resource group], group-based beam reporting for DL ​​multi-TRP reception, etc. may be read interchangeably.

[0095] According to option 1, new upper layer parameters can be used to properly perform STxMP operation (or group-based beam reporting for STxMP).

[0096] <<Option 2>> As the first parameter, a higher layer parameter indicating the number of resource groups to be reported per CSI report, which is common to both group-based beam reporting of Rel. 18 [or later] and group-based beam reporting of Rel. 17, may be used. In this case, the existing nrofReportedGroups-r18 of Rel. 18 may be modified to nrofReportedGroups-r17, so that the higher layer parameter (e.g., nrofReportedGroups-r17) indicating the number of resource groups to be reported per CSI report for group-based beam reporting of Rel. 17 may be reused as the first parameter. In other words, the UE may use the higher layer parameter indicating the number of resource groups to be reported per CSI report for group-based beam reporting of Rel. 17 as the first parameter.

[0097] In this case, the value of the first parameter may be any one of {n1, n2, n3, n4}.

[0098] If option 2 applies, the following example may be specified in the specification: Example If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', or 'ssb-Index-RSRP-Index', -◆If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'disabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports nrofReportedRS (configured by higher layers) different CRIs or SSBRIs for each reporting setting within a single reporting instance. If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'enabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports two different CRIs or SSBRIs for each reporting setting within a single reporting instance. CSI-RS / SSB resources can be received simultaneously by the UE using either a single spatial domain receive filter or multiple simultaneous spatial domain receive filters. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r17, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and if the UE is configured with nrofReportedGroups, the UE reports nrofReportedGroups groups of two CSI-RS or SSBRIs in a single reporting instance, selecting one CSI-RS or SSB from each of the two CSI resource sets for each reporting setting. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to JointULandDL, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r17, the UE reports two nrofReportedGroups-r17 groups of CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities. If the UE is configured with the upper layer parameter groupBasedBeamReporting-r18 set to UL only, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If the UE is configured with nrofReportedGroups-r17, the UE reports two nrofReportedGroups-r17 groups of CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities.

[0099] In the above example, nrofReportedGroups-r17 may be referred to as an upper layer parameter indicating the number of resource groups reported per CSI report for group-based beam reporting in Rel. 17, an upper layer parameter common to both group-based beam reporting in Rel. 18 [or later] and group-based beam reporting in Rel. 17, etc. Also, in the above example, nrofReportedGroups and nrofReportedGroups-r17 may be the same parameter. That is, in the above example, nrofReportedGroups and nrofReportedGroups-r17 may be read as interchangeable.

[0100] <<<Variation of Option 2>>> Option 2 above may be achieved by deleting the suffix of the existing nrofReportedGroups-r18 of Rel.18. In this case, the existing nrofReportedGroups-r18 of Rel.18 is modified to nrofReportedGroups (the suffix of the existing nrofReportedGroups-r18 of Rel.18 is deleted), and thereby the higher layer parameter (e.g., nrofReportedGroups) indicating the number of resource groups reported per CSI report for group-based beam reporting of Rel.17 may be reused as the first parameter. That is, the UE may use the higher layer parameter indicating the number of resource groups reported per CSI report for group-based beam reporting of Rel.17 as the first parameter.

[0101] In this case, the value of the first parameter may be any one of {n1, n2, n3, n4}.

[0102] In this case, the following example may be specified: Example If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index', or 'ssb-Index-RSRP-Index', -◆If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'disabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports nrofReportedRS (configured by higher layers) different CRIs or SSBRIs for each reporting setting within a single reporting instance. If the UE is configured with the higher layer parameter groupBasedBeamReporting set to 'enabled', the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and the UE reports two different CRIs or SSBRIs for each reporting setting within a single reporting instance. CSI-RS / SSB resources can be received simultaneously by the UE using either a single spatial domain receive filter or multiple simultaneous spatial domain receive filters. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r17, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources, and if the UE is configured with nrofReportedGroups, the UE reports nrofReportedGroups groups of two CSI-RS or SSBRIs in a single reporting instance, selecting one CSI-RS or SSB from each of the two CSI resource sets for each reporting setting. The CSI-RS / SSB resources in each group can be received simultaneously by the UE. If the UE is configured with the higher layer parameter groupBasedBeamReporting-r18 set to JointULandDL, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If nrofReportedGroups is configured, the UE reports nrofReportedGroups groups of two CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance for each reporting setting. The CSI-RS / SSB resources in each group can be simultaneously received by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities. If the UE is configured with the upper layer parameter groupBasedBeamReporting-r18 set to UL only, the UE does not need to update measurements for more than 64 CSI-RS / SSB resources. If nrofReportedGroups is configured, the UE reports nrofReportedGroups groups of two CSI-RS or SSBRIs, selecting one CSI-RS or SSB from each of the two CSI resource sets, within a single reporting instance for each reporting setting. The CSI-RS / SSB resources in each group can be simultaneously received by the UE. The CSI-RS / SSB resources in each group can also be applied to simultaneous transmissions using spatial filtering by the UE, depending on the UE capabilities.

[0103] In the above example, nrofReportedGroups may be referred to as an upper layer parameter indicating the number of resource groups reported per CSI report for Rel.17 group-based beam reporting, an upper layer parameter common to both Rel.18 [and later] group-based beam reporting and Rel.17 group-based beam reporting, etc.

[0104] Option 2 does not require new upper layer parameters, which can minimize the impact on UEs and BSs that have already implemented the technology. Furthermore, existing upper layer parameters can be used to properly perform STxMP operation (or group-based beam reporting for STxMP).

[0105] <<Variations>> The operation / control of this embodiment may be applied when the UE is configured with an upper layer parameter that enables group-based beam reporting for STxMP (e.g., groupBasedBeamReporting-r18 set to JointULandDL or ULOnly; hereinafter also referred to as the second parameter).

[0106] When the second parameter set to the first value (e.g., groupBasedBeamReporting-r18 set to JointULandDL) is configured, the UE may simultaneously transmit / receive pairs / combinations of beams included in each of the nX resource groups in the one CSI report (i.e., beams corresponding to multiple CRIs / SSBRIs included in each of the nX resource groups). The first value may be interpreted as a value indicating simultaneous transmission / reception of pairs / combinations of beams included in each of the nX resource groups in one CSI report.

[0107] When the UE configures the second parameter set to a second value (e.g., groupBasedBeamReporting-r18 set to ULOnly), the UE may simultaneously transmit pairs / combinations of beams included in each of the nX resource groups in the single CSI report (i.e., beams corresponding to multiple CRIs / SSBRIs included in each of the nX resource groups). The second value may be interpreted as a value indicating simultaneous transmission of pairs / combinations of beams included in each of the nX resource groups in a single CSI report.

[0108] When group-based beam reporting (groupBasedBeamReporting without a suffix) of Rel. 15 is configured, the upper layer parameters (e.g., nrofReportedGroups-r18 / nrofReportedGroups-r17 / nrofReportedGroups) indicating the number of resource groups to be reported per CSI report described above may not be configured. In this case, the UE may report two resource groups, each containing multiple (e.g., two) CRIs / SSBRIs, in one CSI report.

[0109] According to the embodiment described above, the STxMP operation (or group-based beam reporting for STxMP) can be performed appropriately.

[0110] <Supplementary Note> <<Notification of Information to UE / BS>> The notification of any information from the [Network (NW) (e.g., Base Station (BS)) / NW node to the UE / BS] in the above-described embodiment (or, in other words, the reception of any information from the BS / NW node by the UE / BS) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0111] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) that is not defined in the existing standard in the MAC subheader.

[0112] When the above notification is performed by DCI, the above notification may be performed by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used for scrambling the Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0113] Also, the notification of any information to the UE / BS in the above-described embodiment may be performed periodically, semi-persistently, or aperiodically. The semi-persistent or aperiodic notification of information may be triggered by an instruction from the UE / BS / NW.

[0114] In the above-described embodiment, the information from the NW may be set / instructed by any one or a combination of the following methods: · Common to multiple UEs, or individual to each UE (per UE), · Common to multiple BSs or individual to each BS (per BS). · Common to multiple frequencies (e.g., one or a combination of cells, bands, band combinations, Bandwidth Parts (BWP), component carriers, etc.) (e.g., cell common) or specific to a frequency (per frequency, e.g., per cell).

[0115] <<Notification of Information from UE / BS>> The notification of any information from the UE / BS to the [NW] in the above embodiments (or, in other words, the transmission / reporting of any information from the UE / BS to the BS / NW node) may be performed using physical layer signaling (e.g., UCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0116] When the above notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID not defined in the existing standard in the MAC subheader.

[0117] When the above notification is performed by UCI, the above notification may be transmitted using PUCCH or PUSCH.

[0118] Also, the notification of any information from the UE / BS in the above embodiments may be performed periodically, semi-persistently, or aperiodically. The semi-persistent or aperiodic information notification may be triggered by an instruction from the UE / BS / NW.

[0119] <<Regarding the Application of Each Embodiment>> In the UE / BS, specific (e.g., one or more, or some) processing / operations / controls / assumptions / information regarding at least one of the above embodiments may be applied (used) when any one or a plurality of the following conditions are satisfied: Upper layer parameters indicating the above specific processing / operation / control / assumment / information are set in the UE / BS; The specific processing / operation / control / assumption / information is determined in the UE / BS based on relevant higher layer parameters; The above specific process / operation / control / assumption / information is specified / activated / triggered for the UE / BS by the MAC CE / DCI / UCI / resource / channel / RS, The UE / BS reports or supports specific capabilities (e.g., UE capabilities) that indicate (or relate to) the specific processing / action / control / assumptions / information. The application of the above specific processing / operation / control / assumption / information is determined in the UE / BS based on specific conditions.

[0120] The specified capabilities may indicate at least one of the following: Supporting the above specific processes / actions / controls / assumptions / information; Support group-based beam reporting for STxMP; The number of resource groups that can be reported in group-based beam reporting for STxMP, The maximum number of resource groups that can be reported in group-based beam reporting for STxMP, Supports [any process / action / control / assumption / information within] option 1 / 2.

[0121] In the present disclosure, "supporting" and "whether to support" may be read interchangeably.

[0122] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0123] Furthermore, the specific capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or capabilities that are specific to each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0124] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0125] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] a control unit that controls to report one or more resource groups in one channel state information (CSI) report based on a specific parameter indicating the number of resource groups to be reported in one CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP); A terminal having a transmitting unit that simultaneously transmits multiple beams corresponding to multiple resources included in each of the one or more resource groups. [Appendix 2] The terminal described in Supplementary Note 1, wherein the specific parameter is a higher layer parameter dedicated to reporting beam combinations for each resource group for the STxMP. [Appendix 3] The terminal described in Appendix 1 or Appendix 2, wherein the specific parameter is a parameter common to both reporting a beam combination for each resource group for the STxMP and reporting a downlink beam combination for each resource group that can be received simultaneously. [Appendix 4] A terminal described in any one of Supplementary Note 1 to Supplementary Note 3, wherein the control unit uses, as the specific parameter, an upper layer parameter indicating the number of resource groups reported per CSI report for reporting combinations of downlink beams for each resource group that can be received simultaneously.

[0126] (wireless communication system) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0127] 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0128] The wireless communication system 1 may also 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)), etc.

[0129] 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.

[0130] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0131] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A terminal 20 may be located within at least one of the cells. The arrangement, number, shape, size, etc. of each cell and terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0132] 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 may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a super cell) may be composed of multiple [virtual] cells (which may be called, for example, sub-cells). A super cell may correspond to a cell whose physical range is fixed, and a sub-cell may correspond to a cell whose physical range varies semi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0133] The terminal 20 may be connected to at least one of the multiple base stations 10. The terminal 20 may use at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0134] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0135] Furthermore, the terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0136] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0137] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN, 5GC), a Next Generation Core (NGC), and the like.

[0138] The core network 30 may include network functions (Network Functions (NFs)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that a single network node (which may simply be referred to as a node) may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0139] The terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0140] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0141] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0142] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0143] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0144] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0145] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0146] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0147] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0148] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0149] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0150] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0151] 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, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted as DL-RS.

[0152] 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 the SS (PSS, SSS) and the PBCH (and DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0153] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0154] (base station) 7 is a diagram illustrating an example of the configuration of a base station according to an embodiment of the present disclosure. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0155] In this example, the functional blocks of the characteristic parts of the present 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 unit described below may be omitted.

[0156] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0157] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0158] The transceiver 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 transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0159] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0160] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0161] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0162] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0163] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0164] The transceiver 120 (transmission processor 1211) may perform transmission processing 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 on the bit string to be transmitted, and output a baseband signal.

[0165] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0166] 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 .

[0167] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0168] The transceiver 120 (measurement unit 123) may perform measurements on 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 measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0169] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the terminal 20.

[0170] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0171] 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 perform RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may perform higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may perform PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0172] In the present disclosure, the base station 10 may include a single device that implements all of the functions of the RU, DU, and CU, or may include multiple devices that each implement some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0173] The control unit 110 may instruct one or more resource groups to be reported in one channel state information (CSI) report using a specific parameter indicating the number of resource groups to be reported per CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP).

[0174] The transceiver 120 may receive multiple beams that correspond to multiple resources included in each of the one or more resource groups and are transmitted simultaneously.

[0175] (Terminal) 8 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. The terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0176] In this example, functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0177] The control unit 210 performs overall control of the terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0178] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0179] The transceiver 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 transceiver unit 220 may be configured from a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0180] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0181] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0182] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0183] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0184] The transceiver 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, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0185] The transceiver 220 (transmission processor 2211) may perform transmission processing 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 on the bit string to be transmitted, and output a baseband signal.

[0186] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0187] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0188] 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.

[0189] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which 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.

[0190] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may 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.

[0191] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The 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 the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0192] The transmitting section and receiving section of the terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0193] The control unit 210 may control to report one or more resource groups in one channel state information (CSI) report based on a specific parameter indicating the number of resource groups to be reported per CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP).

[0194] The transceiver 220 may simultaneously transmit multiple beams corresponding to multiple resources included in each of the one or more resource groups.

[0195] The specific parameter may be a higher layer parameter (e.g., nrofReportedGroups-r18) dedicated to reporting beam combinations per resource group for the STxMP.

[0196] The specific parameter may be a parameter (e.g., nrofReportedGroups-r17 / nrofReportedGroups) that is common to both reporting beam combinations for each resource group for the STxMP and reporting downlink beam combinations for each resource group that can be received simultaneously.

[0197] The control unit 210 may use, as the specific parameter, an upper layer parameter (e.g., nrofReportedGroups-r17 / nrofReportedGroups) indicating the number of resource groups reported per CSI report for reporting downlink beam combinations for each resource group that can be received simultaneously.

[0198] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0199] For example, a base station, a terminal, a network node, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 9 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0200] In the present disclosure, any two terms selected from a set of terms such as apparatus, circuit, device, section, unit, module, chip, means, etc. may be read as interchangeable. The hardware configurations of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0201] Each function in the base station 10 and the terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control the reading, writing, or both reading and writing of data in the memory 1002 and the storage 1003.

[0202] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0203] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0204] The various processes described above may be performed by one processor 1001, or may be performed by two or more processors 1001 simultaneously, sequentially, or using other techniques. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunications line, or may be provided to the computer device via, for example, the communication device 1004.

[0205] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0206] The memory 1002 is a non-transitory computer-readable recording medium and may be configured, for example, by a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EEPROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to one embodiment of the present disclosure.

[0207] Storage 1003 is a non-transitory computer-readable recording medium, and may be, for example, a flexible disk, a floppy disk, an optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a magneto-optical disk, a removable disk, a hard disk drive, a smart card, a flash memory (e.g., a card, stick, key drive), a magnetic stripe, or the like, or a combination of at least two of these. Storage 1003 may also be referred to as a secondary storage device.

[0208] The above-mentioned recording medium may be, for example, the memory 1002, the storage 1003, or a database including both the memory 1002 and the storage 1003, a server, or other suitable medium.

[0209] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired network, a wireless network, or both a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., or a combination of at least two of these. For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0210] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc., or a combination of at least two of these). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc., or a combination of at least two of these). Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0211] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0212] Furthermore, base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized using such hardware. For example, processor 1001 may be implemented using at least one of these hardware elements.

[0213] In this disclosure, the term "processor" may encompass a single processor or a group of multiple processors, including, for example, a single-core processor, a multi-core processor, multiple processors in a single device, multiple processors in wired or wireless communication with each other, etc. Similarly, the term "(non-transitory) computer-readable storage medium" may encompass a single storage medium or a group of multiple storage media, including multiple storage media in wired or wireless communication with each other.

[0214] Devices such as processors and storage media in the present disclosure may be distributed locally or remotely, and may perform the processing of the devices by operating cooperatively or independently using a bus, network, the Internet, the cloud, etc.

[0215] Note that the devices included in the core network 30 (for example, network nodes that provide NFs) may also be realized by the above-described functional block / hardware configuration.

[0216] (Variation) Each aspect / embodiment described in the present disclosure may be a mobile communication system other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (Open RAN (O-RAN)), Wideband Code Division Multiple Access (W-CDMA (registered trademark)), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x = n, it is called Wi-Fi 4, when x = ac, it is called Wi-Fi 5, when x = ax, it is called Wi-Fi 6 or Wi-Fi 6E, when x = be, it is called Wi-Fi 7, and when x = bn, it is called Wi-Fi 8.Note that the present disclosure may be applied to systems based on technologies such as Wi-Fi (a registered trademark), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), network virtualization technologies (e.g., Network Function Virtualization (NFV), Service Function Chaining (SFC), Software Defined Networking (SDN)), or Low Power Wide Area (LPWA). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Here, "based on" naturally refers not only to a system that uses the technology in question, but also to a system that uses an extension or modification of the technology.

[0217] In the present disclosure, any two terms selected from a set of terms such as "Base Station (BS)", "Radio Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "Access Point (AP)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Radio Unit (RU)", "Remote Unit (RU)", "Control Unit (CU)", "Distributed Unit (DU)", "Remote Radio Head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "High Altitude Platform Station (HAPS)", "airborne platform", "panel", "cell", "Radio Access Network (RAN)", "network", etc. may be used interchangeably. Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, a super cell, etc. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0218] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module", "Terminal", etc. may be used interchangeably.

[0219] A terminal may be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, router (e.g., home router, mobile router, etc.), Telematics Control Unit (TCU), or some other suitable terminology.

[0220] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a part of the base station and the terminal may be called a transmitting device, a receiving device, a [wireless] communication device, etc. In addition, the devices constituting at least a portion of each of the base stations and terminals may be objects themselves, such as vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, unmanned aerial vehicles, stratospheric base stations (e.g., High Altitude Platform Stations (HAPS)), artificial satellites (e.g., Low Earth Orbit (LEO) satellites, Middle Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites), drones (registered trademark), multicopters, quadcopters, balloons, Internet of Things (IoT) equipment (e.g., smart meters, sensors), etc., or may include, but are not limited to, objects or devices mounted on such objects. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is stationary and not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0221] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)) or communication in a non-terrestrial network (Non-Terrestrial Network (NTN)). In this case, the terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link, service link). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0222] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0223] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0224] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as an Evolved Packet Core (EPC) or a 5G Core Network (5GCN, 5GC), and provides one or more network functions (Network Functions (NFs)), but is not limited to these.

[0225] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, operations such as "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" or "a terminal configures a predetermined operation based on the configuration information."

[0226] The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination of at least two of them.

[0227] The physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as, for example, a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU). The RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC signaling may be, for example, a message used for controlling an RRC connection (e.g., setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, notification of terminal capabilities, or an information element in the message.

[0228] Furthermore, notification of information may be either explicit or implicit. Note that an explicit notification of certain information means notification of the certain information itself, and an implicit notification of certain information may mean notification of information other than the certain information, or the certain information being deemed to have been notified when a certain condition is met.

[0229] Furthermore, notification of information may include not only notification between the same layers of different devices (for example, between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (for example, between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices.

[0230] With respect to any information (e.g., variables, constants, parameters, settings) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., terminal / base station) may notify any second device (e.g., base station / terminal) of information indicating / identifying (or relating to) the value of the any information.

[0231] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed as long as it is consistent. For example, the methods described in this disclosure present various step elements using an exemplary order and are not limited to the particular order presented. Furthermore, at least one step may be omitted in the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure.

[0232] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0233] In the present disclosure, a radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0234] For example, a resource in the time domain (which may be referred to as a time resource) may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. Furthermore, the time unit may be a fixed-length time unit that is independent of numerology, a variable-length time unit that is dependent on numerology, or both.

[0235] Examples of fixed-length time units include, but are not limited to, subframes each consisting of one or more slots and radio frames each including multiple subframes. Examples of variable-length time units include, but are not limited to, symbols and slots each including a fixed number of symbols. A certain time unit may be divided into time units shorter than the certain time unit. Examples of such shorter time units include, but are not limited to, minislots each consisting of fewer symbols than the number of symbols that make up a slot. The above-described time units may include time units used as units for scheduling, link adaptation, and the like. Any time unit in the present disclosure may be interchangeable with another time unit.

[0236] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of the subcarrier spacing (SCS), the symbol length, the cyclic prefix length, and the sampling time, for example.

[0237] A resource in the frequency domain (which may also be referred to as a frequency resource) may be defined by, for example, one or more frequency units. The one or more frequency units may include, for example, a subcarrier, a resource block (RB), a bandwidth part (BWP), a carrier bandwidth, or a combination of at least two of these, but the name of the frequency unit is not limited to these. Furthermore, the number of subcarriers included in a certain frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology.

[0238] For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. Also, a BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Also, any frequency unit in the present disclosure may be interpreted as another frequency unit.

[0239] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0240] The resources in the spatial domain (which may also be referred to as spatial resources) may be defined, for example, by one or more spatial units, including, but not limited to, beams, layers of Multi-Input Multi-Output (MIMO), antenna ports, etc., or a combination of at least two of them.

[0241] The resource in the code domain (which may also be referred to as a code resource) may be defined by, for example, one or more code units, including, but not limited to, a Cyclic Shift (CS), an Orthogonal Cover Code (OCC), or a combination thereof.

[0242] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0243] In the present disclosure, terms such as "decide," "determine," "judge," "select," "specify," "compute," "calculate," "process," "derive," "look up / search / inquiry," "confirm," "assume," "expect," and "consider" may be read interchangeably. Also, in the present disclosure, performing a certain process (e.g., sending, receiving) may be read interchangeably as deciding to perform that process. Also, in the present disclosure, "not expected to do..." may be read interchangeably as "assumed not to do...."

[0244] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...," "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ...," "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read 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).

[0245] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with the prefix "i-th" (i is any integer) (for example, "highest" may be interchangeable as "i-th highest").

[0246] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0247] In the present disclosure, terms 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. Note that A, B, and the like herein may be replaced with appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be nearly zero (immediately after or immediately before). A time offset may be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after the time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0248] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0249] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial relation information," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0250] In the present disclosure, an antenna port may be interchangeably read as an antenna port for any signal / channel (e.g., a Demodulation Reference Signal (DMRS) port). In the present disclosure, a resource may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource). Furthermore, the spatial domain filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0251] In the present disclosure, beam, sounding reference signal (SRS) resource indicator (SRS Resource Indicator (SRI)), control resource set (CONTROLLER RESOLUTION SET (CORESET)), CORESET pool, uplink shared channel (Physical Downlink Shared Channel (PDSCH)), uplink shared channel (Physical Uplink Shared Channel (PUSCH)), codeword (CW), transport block (TB), reference signal (RS), etc. may be interpreted as interchangeable.

[0252] In the present disclosure, the terms TCI state, TCI, downlink TCI state (Downlink (DL) TCI state), uplink TCI state (Uplink (UL) TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0253] Furthermore, in this disclosure, terms such as "QCL," "QCL assumptions," "QCL relationships," "QCL type information," "QCL properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0254] In this disclosure, terms such as index, identifier (ID), identity (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0255] In the present disclosure, a group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, an RS group, a CORESET group, a Physical Uplink Control Channel (PUCCH) group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0256] Information in this disclosure (e.g., variables, constants, parameters, settings) may be interchangeably read as the ID of the information. For example, TCI state and TCI state ID may be interchangeably read as the ID of the information. Also, information in this disclosure may be interchangeably read as "a set of the information," "one or more pieces of the information," etc.

[0257] Any signal / channel (e.g., PUCCH) in the present disclosure may be interchangeably read as another signal / channel (e.g., PUSCH, PDSCH, any RS). A signal / channel may be interchangeably read as a signal / channel for the same direction (e.g., UL if the certain signal / channel is in the UL direction, and DL if in the DL direction), or as a signal / channel for another direction (e.g., DL if the certain signal / channel is in the UL direction, and UL if in the DL direction). Also, in the present disclosure, descriptions related to DL communication and descriptions related to UL communication may be interchangeably read. In this case, DL (UL) operation may be interchangeably read as the corresponding UL (DL) operation. For example, reception of a PDSCH in a terminal may be interchangeably read as transmission of a PUSCH in the terminal.

[0258] In the present disclosure, terms such as "X's number," "X number," "the number of X(s)," and "a number of X(s)" may be interchangeable. Note that X here may be replaced with an appropriate expression such as a noun, a gerund, or an ordinary sentence, depending on the context. In the present disclosure, "number" may be interchangeable with terms such as maximum number, minimum number, average number, and total number. In addition, in the present disclosure, terms such as "value," "index," "number," and "quantity" may be interchangeable with each other.

[0259] Values / ranges in this disclosure may be interpreted as approximations, as if the words "about" or "approximately" were preceding the value / range. In this disclosure, "A and B are the same" (A and B are any words) may mean "A and B are identical," "A and B are almost the same," "A and B are partly the same (or partially overlapped)," "There is an error within a certain range between A and B," etc. (i.e., these words may be read interchangeably). Furthermore, in the present disclosure, A and B being the same may mean that at least part of A and at least part of B are the same (or overlapped).

[0260] In this disclosure, the terms "one embodiment," "some embodiments," "another embodiment," etc. may be used interchangeably. The appearances of phrases such as "one embodiment," "some embodiments," "another embodiment," etc. in this disclosure do not necessarily all refer to the same embodiment, nor are they necessarily meant to be mutually exclusive.

[0261] In the present disclosure, expressions such as "at least one of A and B," "at least one of A or B," "A and / or B," and "A / B" may be read interchangeably and may be understood to include "only A," "only B," or "both A and B." Furthermore, in the present disclosure, expressions such as "at least one of A, B, and C," "at least one of A, B, or C," "A, B and / or C," and "A / B / C" may be read interchangeably and may be understood to include "only A," "only B," "only C," "A and B," "B and C," "C and A," or "all of A, B, and C." Note that similar interpretations / readings can be applied to any expression in this disclosure such as "at least X of ..." (where the number of elements in "..." and X are each any number).

[0262] In the present disclosure, expressions such as "A, [and] B, and the like" / "such as A and B"," "A, [or] B, or the like" / "such as A or B"," "A, B, etc." / "A, B, and so on" / "A, B, and so forth"," and "A, B, [and / or] the others" may be read interchangeably.

[0263] In the present disclosure, expressions representing one / single X (e.g., "a X," "one X," "a single X"), expressions representing one or more X (e.g., "one or more X(s)," "at least one of X(s)"), and expressions representing a plurality of X (e.g., "Xs," "more than one X(s)," "multiple X(s)," "a plurarity of X(s)") may be read interchangeably. Note that these expressions may also be read interchangeably with expressions that include specific wording (e.g., when X is an uncountable noun, "pieces of," "amount of," etc.). For example, "a plurality of pieces of spatial relation information" may be read interchangeably as "a plurality of spatial relation information."

[0264] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

Claims

1. a control unit configured to control reporting of one or more resource groups in one channel state information (CSI) report based on a specific parameter indicating the number of resource groups to be reported in one CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP); A terminal having a transmitter that simultaneously transmits multiple beams corresponding to multiple resources included in each of the one or more resource groups.

2. The terminal according to claim 1 , wherein the specific parameter is a higher layer parameter dedicated to reporting beam combinations for each resource group for the STxMP.

3. The terminal of claim 1, wherein the specific parameter is a parameter common to both reporting beam combinations for each resource group for the STxMP and reporting downlink beam combinations for each resource group that can be received simultaneously.

4. The terminal of claim 1, wherein the control unit uses, as the specific parameter, an upper layer parameter indicating the number of resource groups reported per CSI report for reporting combinations of downlink beams for each resource group that can be received simultaneously.

5. controlling one or more resource groups to be reported in one channel state information (CSI) report based on a specific parameter indicating the number of resource groups to be reported per CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP); A wireless communication method for a terminal, comprising the step of simultaneously transmitting multiple beams corresponding to multiple resources included in each of the one or more resource groups.

6. a control unit that instructs reporting one or more resource groups in one channel state information (CSI) report using a specific parameter indicating the number of resource groups to be reported per CSI report for reporting beam combinations per resource group for simultaneous transmission using multiple panels (STxMP); A base station having a receiving unit that receives multiple beams that correspond to multiple resources included in each of the one or more resource groups and are transmitted simultaneously.

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