Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure comprises: a receiver unit that receives information related to an association between a Transmission Configuration Indication (TCI) and a panel ID; and a control unit that, with respect to a resource identifier of a measurement signal when said measurement signal reports a measurement result, supports a report of a plurality of measurement results that correspond to a plurality of panels.

Description

Terminal, wireless communication method and base station

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

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network 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) 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, etc.) are also being considered.

[0004] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

[0005] In future wireless communication systems (e.g., Rel. 17 and later), it is expected that a terminal will use multiple panels to control communications. When multiple panels are used, it is expected that each panel will correspond to a different configuration (e.g., a different number of ports / different beams). Furthermore, it is also expected that a panel (or panel entity) will correspond to one or more reference signal resources (hereinafter also referred to as RS resources).

[0006] It is also assumed that the panel entity (or panel ID) corresponding to one RS resource may be different, and the problem arises as to how to achieve a common understanding between the UE and the base station regarding the panel entity corresponding to the RS resource (or TCI state).

[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 communication even when multiple panels are applied.

[0008] A terminal according to one aspect of the present disclosure is characterized by having a receiving unit that receives information relating to the association between a transmission configuration indicator (TCI) and a panel ID, and a control unit that, when reporting measurement results of a measurement signal, supports reporting of multiple measurement results corresponding to multiple panels for the same resource identifier of the measurement signal.

[0009] According to one aspect of the present disclosure, communication can be performed appropriately even when multiple panels are used.

[0010] Figures 1A and 1B are diagrams illustrating example RRC information elements related to CSI reporting configuration and CSI resource configuration. Figures 2A and 2B are diagrams illustrating example RRC information elements related to NZP CSI-RS resource sets and CSI-SSB resource sets. Figure 3 is a diagram illustrating example RRC information elements related to TCI states. Figure 4 is an excerpt of the RRC information element "CSI-ReportConfig." Figure 5 is a diagram illustrating an example of a CSI report in Rel. 15 NR. Figures 6A and 6B are diagrams illustrating an example of a common beam. Figures 7A and 7B are diagrams illustrating an example of a CSI report according to the first aspect. Figures 8A and 8B are diagrams illustrating another example of a CSI report according to the first aspect. Figures 9A and 9B are diagrams illustrating example higher layer parameters according to the second aspect. Figures 10A and 10B are diagrams illustrating an example of a MAC CE according to the second aspect.

[0046] Figures 11A and 11B are diagrams showing an example of DCI in the second aspect. Figure 12 is a diagram showing another example of MAC CE in the second aspect. Figure 13 is a diagram showing another example of MAC CE in the second aspect. Figure 14 is a diagram showing an example of MAC CE and DCI in the second aspect. Figures 15A and 15B are diagrams showing another example of MAC CE and DCI in the second aspect. Figures 16A to 16C are diagrams showing another example of MAC CE and DCI in the second aspect. Figures 17A and 17B are diagrams showing another example of MAC CE and DCI in the second aspect. Figures 18A and 18B are diagrams showing another example of MAC CE and DCI in the second aspect. Figures 19A and 19B are diagrams showing another example of MAC CE and DCI in the second aspect. 20A and 20B are diagrams showing other examples of MAC CE and DCI in the second aspect. FIGS. 21A to 21C are diagrams showing other examples of MAC CE and DCI in the second aspect. FIGS. 22A to 22C are diagrams showing other examples of MAC CE and DCI in the second aspect. FIGS. 23A and 23B are diagrams showing examples of higher layer parameters and MAC CE in a variation. FIGS. 24A and 24B are diagrams showing examples of higher layer parameters in a variation. FIG. 25 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.Fig. 26 is a diagram illustrating an example of a configuration of a base station according to an embodiment. Fig. 27 is a diagram illustrating an example of a configuration of a user terminal according to an embodiment. Fig. 28 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment.

[0011] (TCI, spatial relationship, QCL) In NR, it is considered to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0012] The TCI state may represent that which is applied to a downlink signal / channel, and the equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0013] The TCI state is information about the Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or signal.

[0014] The QCL is an index indicating the statistical properties of signals / channels. For example, if a signal / channel has a QCL relationship with another signal / channel, it may mean that it can be assumed that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, and a spatial parameter (e.g., a spatial Rx parameter) is the same between these different signals / channels (i.e., the signals / channels have a QCL with respect to at least one of these).

[0015] The spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be identified based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with sQCL (spatial QCL).

[0016] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be referred to as QCL parameters) are as follows: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay, and delay spread QCL type B (QCL-B): Doppler shift and Doppler spread QCL type C (QCL-C): Doppler shift and mean delay QCL type D (QCL-D): Spatial reception parameters.

[0017] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0018] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumption of the signal / channel.

[0019] The TCI state may be, for example, information about the QCL between the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0020] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0021] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0022] Furthermore, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0023] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may also be referred to as an SS / PBCH block.

[0024] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0025] For the PDCCH and PDSCH, the QCL Type A RS is always configured, and the QCL Type D RS may be configured additionally. Since it is difficult to estimate Doppler shift, delay, etc. by one-shot reception of the DMRS, the QCL Type A RS is used to improve the accuracy of channel estimation. The QCL Type D RS is used to determine the receiving beam when receiving the DMRS.

[0026] For example, TRS1-1, 1-2, 1-3, and 1-4 are transmitted, and TRS1-1 is notified as a QCL type C / D RS depending on the TCI status of the PDSCH. By notifying the TCI status, the UE can use information obtained from past periodic reception / measurement results of TRS1-1 for reception / channel estimation of the DMRS for the PDSCH. In this case, the QCL source of the PDSCH is TRS1-1, and the QCL target is the DMRS for the PDSCH.

[0027] (CSI) In NR, the UE measures the channel state using a reference signal (or a resource for the reference signal) and feeds back (reports) channel state information (CSI) to the network (e.g., a base station).

[0028] The UE may measure the channel state using at least one of 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.

[0029] The CSI-RS resource may include at least one of a Non Zero Power (NZP) CSI-RS resource, a Zero Power (ZP) CSI-RS resource, and a CSI Interference Measurement (CSI-IM) resource.

[0030] Resources for measuring signal components for CSI may be referred to as signal measurement resources (SMR) or channel measurement resources (CMR). The SMR (CMR) may include, for example, NZP CSI-RS resources, SSBs, etc. for channel measurement.

[0031] A resource for measuring interference components for CSI may be referred to as an interference measurement resource (IMR). The IMR may include, for example, at least one of an NZP CSI-RS resource, an SSB, a ZP CSI-RS resource, and a CSI-IM resource for interference measurement.

[0032] An SS / PBCH block is a block that includes a synchronization signal (e.g., a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS)) and a PBCH (and corresponding DMRS), and may also be referred to as an SS block (SSB).

[0033] 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 (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), and the like.

[0034] The CSI may have multiple parts: CSI Part 1 may include information with a relatively small number of bits (e.g., RI), and CSI Part 2 may include information with a relatively large number of bits (e.g., CQI), such as information determined based on CSI Part 1.

[0035] Furthermore, CSI may be classified into several CSI types. The type and size of information to be reported may differ depending on the CSI type. For example, a CSI type set for communication using a single beam (also referred to as type I CSI, single-beam CSI, etc.) and a CSI type set for communication using multiple beams (also referred to as type II CSI, multi-beam CSI, etc.) may be defined. The use of CSI types is not limited to this.

[0036] As CSI feedback methods, periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, semi-persistent CSI (SP-CSI) reporting, etc. are being considered.

[0037] The UE may be notified of the CSI measurement configuration information using higher layer signaling, physical layer signaling, or a combination thereof.

[0038] 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, etc., or a combination thereof.

[0039] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The 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.

[0040] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0041] The CSI measurement configuration information may be configured, for example, using the RRC information element "CSI-MeasConfig." The CSI measurement configuration information may include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI reporting configuration information (RRC information element "CSI-ReportConfig"), etc. The CSI resource configuration information relates to resources for CSI measurement, and the CSI reporting configuration information relates to how the UE performs CSI reporting.

[0042] 1A and 1B are diagrams illustrating an example of RRC information elements related to CSI reporting configuration and CSI resource configuration. In this example, excerpts of fields (which may also be referred to as parameters) included in the information elements are illustrated. 1A and 1B are written using ASN.1 (Abstract Syntax Notation One) notation. Note that other figures relating to RRC information elements (or RRC parameters) in the present disclosure are also written using the same notation.

[0043] As shown in FIG. 1A , the CSI reporting configuration information ("CSI-ReportConfig") includes resource information for channel measurement ("resourcesForChannelMeasurement"). The CSI reporting configuration information may also include resource information for interference measurement (e.g., NZP CSI-RS resource information for interference measurement ("nzp-CSI-RS-ResourcesForInterference"), CSI-IM resource information for interference measurement ("csi-IM-ResourcesForInterference"), etc.). These pieces of resource information correspond to the ID (Identifier) ​​of the CSI resource configuration information ("CSI-ResourceConfigId").

[0044] In addition, the IDs of the CSI resource configuration information corresponding to each piece of resource information (which may also be called CSI resource configuration IDs) may be one or more of the same value, or may each have a different value.

[0045] 1B , the CSI resource configuration information (“CSI-ResourceConfig”) may include a CSI resource configuration information ID, CSI-RS resource set list information (“csi-RS-ResourceSetList”), a resource type (“resourceType”), etc. The CSI-RS resource set list may include at least one of NZP CSI-RS and SSB information for measurement (“nzp-CSI-RS-SSB”) and CSI-IM resource set list information (“csi-IM-ResourceSetList”).

[0046] The resource type indicates the time domain behavior of this resource configuration, and can be set to "aperiodic," "semi-persistent," or "periodic." For example, the corresponding CSI-RSs may be called A-CSI-RS, SP-CSI-RS, and P-CSI-RS, respectively.

[0047] The channel measurement resources may be used to calculate, for example, CQI, PMI, L1-RSRP, etc. The interference measurement resources may be used to calculate L1-SINR, L1-SNR, L1-RSRQ, and other indices related to interference.

[0048] When interference measurements are performed on CSI-IM, each CSI-RS for channel measurements may be associated with a CSI-IM resource in terms of resources based on the order of the CSI-RS resources and CSI-IM resources in the corresponding resource set.

[0049] The "nzp-CSI-RS-SSB" may include NZP CSI-RS resource set list information ("nzp-CSI-RS-ResourceSetList") and SSB resource set list information for CSI measurements ("csi-SSB-ResourceSetList"), which correspond to one or more NZP CSI-RS resource set IDs ("NZP-CSI-RS-ResourceSetId") and CSI-SSB resource set IDs ("CSI-SSB-ResourceSetId"), respectively, and may be used to identify resources to be measured.

[0050] 2A and 2B are diagrams illustrating example RRC information elements for NZP CSI-RS resource sets and CSI-SSB resource sets.

[0051] As shown in FIG. 2A , the NZP CSI-RS resource set information (“NZP-CSI-RS-ResourceSet”) includes an NZP CSI-RS resource set ID and one or more NZP CSI-RS resource IDs (“NZP-CSI-RS-ResourceId”).

[0052] The NZP CSI-RS resource information ("NZP-CSI-RS-Resource") may include an NZP CSI-RS resource ID and an ID ("TCI-stateId") of a transmission configuration indication state (TCI state). The TCI state will be described later.

[0053] As shown in Figure 2B, the CSI-SSB resource set information ("CSI-SSB-ResourceSet") includes a CSI-SSB resource set ID and one or more SSB index information ("SSB-Index"), which may be an integer between 0 and 63, inclusive, and may be used to identify an SSB within an SS burst.

[0054] FIG. 3 is a diagram showing an example of RRC information elements related to the TCI state.

[0055] The TCI state is information about the Quasi-Co-Location (QCL) of a channel or a signal, and may also be called spatial reception parameters, spatial relation info, etc. The TCI state may be configured or specified to the UE on a per-channel or per-signal basis.

[0056] As shown in Fig. 3, the TCI state information ("TCI-State") may include a TCI state ID and one or more pieces of QCL information ("QCL-Info"). The QCL information may include at least one of information on a reference signal of the QCL source (RS-related information ("referenceSignal")) and information indicating a QCL type (QCL type information ("qcl-Type")). The RS-related information may include information such as an index of the RS (e.g., NZP CSI-RS resource ID, SSB index), a serving cell index, and an index of a BWP (Bandwidth Part) where the RS is located.

[0057] The UE may control reception processing (e.g., at least one of reception, demapping, demodulation, decoding, receive beam determination, etc.), transmission processing (e.g., at least one of transmission, mapping, modulation, coding, transmit beam determination, etc.), etc. for at least one of a signal and a channel (referred to as a signal / channel) based on the TCI state corresponding to the TCI state ID associated with the signal / channel.

[0058] In the present disclosure, "A / B" may also mean "at least one of A and B."

[0059] As shown in Figure 2A, for the P-CSI-RS, the associated TCI state may be configured by RRC, whereas for the P-CSI-RS, SP-CSI-RS, and A-CSI-RS, the associated TCI state may be determined based on higher layer signaling, physical layer signaling, or a combination thereof.

[0060] (Beam Management) In Rel. 15 NR, a method of Beam Management (BM) has been considered. In the 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 at least one of the TCI state and QCL assumption of the signal / channel.

[0061] The UE may report (transmit) measurement results for beam management using an uplink control channel (Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (Physical Uplink Shared Channel (PUSCH)). The measurement results may be CSI including at least one of L1-RSRP, L1-RSRQ, L1-SINR, and L1-SNR, for example.

[0062] Measurement results (e.g., CSI) reported for beam management may be referred to as beam measurements, beam measurement reports, beam reports, beam report CSI, etc.

[0063] The CSI measurement for the beam report may include interference measurement. The UE may measure channel quality, interference, etc. using resources for CSI measurement to derive a beam report.

[0064] The beam report may include at least one of a channel quality measurement result and an interference measurement result. The channel quality measurement result may include, for example, L1-RSRP. The interference measurement result may include, for example, L1-SINR, L1-SNR, L1-RSRQ, or other interference-related indicators (e.g., any indicator other than L1-RSRP).

[0065] The CSI reporting configuration information taking into account the current NR beam management will be described with reference to Figure 4. Figure 4 is an excerpt of the RRC information element "CSI-ReportConfig". Figure 4 excerpts another part of the same CSI reporting configuration information (CSI-ReportConfig) as Figure 1A.

[0066] The CSI reporting configuration information may include a "report quantity" (which may be represented by the RRC parameter "reportQuantity"), which is information on parameters to be reported in one report instance (e.g., one CSI). The report quantity is defined by an ASN.1 object type called "choice type." Therefore, one of the parameters (cri-RSRP, ssb-Index-RSRP, etc.) defined as the report quantity is set.

[0067] A UE in which an upper layer parameter included in the CSI reporting setting 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 setting 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.

[0068] A UE with groupBasedBeamReporting enabled may include, for each report configuration, two different beam measurement resource IDs and two measurement results (e.g., L1-RSRP) corresponding to the respective IDs in the beam report. In other words, a UE with groupBasedBeamReporting enabled divides DL-RSs (e.g., CSI-RSs) into two groups and reports the ID and measurement results for the top RS in each group. Note that the two beam measurement resources (CSI-RS resources, SSB resources) may be simultaneously received by the UE using one spatial domain receive filter or multiple simultaneous spatial domain receive filters.

[0069] 2A may include information regarding repetition of resources within the resource set. The information regarding repetition may indicate, for example, 'on' or 'off'. Note that 'on' may be expressed as 'enabled' or 'valid', and 'off' may be expressed as 'disabled' or 'invalid'.

[0070] For example, for a resource set with repetition set 'on', the UE may assume that the resources in that resource set are transmitted using the same downlink spatial domain transmission filter, and in this case, the UE may assume that the resources in that resource set are transmitted using the same beam (e.g., from the same base station).

[0071] For a resource set for which repetition is set to 'off', the UE may control such that it must not (or may not) assume that resources within the resource set are transmitted using the same downlink spatial-domain transmit filter. In this case, the UE may assume that resources within the resource set are not transmitted using the same beam (transmitted using different beams). In other words, for a resource set for which repetition is set to 'off', the UE may assume that the base station is performing beam sweeping.

[0072] In Rel. 15 NR, the cri-RSRP and ssb-index-RSRP reporting parameters are related to beam management. A UE configured with cri-RSRP as the reporting parameter reports a CRI and the L1-RSRP corresponding to the CRI. A UE configured with ssb-index-RSRP as the reporting parameter reports an SSBRI and the L1-RSRP corresponding to the SSBRI.

[0073] 5 is a diagram showing an example of a CSI report in Rel. 15 NR. The diagram shows the mapping order of CSI fields included in one CSI report (the nth CSI report #n) for CSI / RSRP or SSBRI / RSRP reporting, as specified in Table 6.3.1.1.2-8 of 3GPP TS 38.212 V15.7.0.

[0074] The CSI report in Fig. 5 may include one or more pairs of CRI / SSBRI and RSRP, the number of which may be configured by a higher layer parameter (e.g., the RRC parameter "nrofReportedRS") indicating the number of reference signal resources to be reported.

[0075] For L1-RSRP reporting, if nrofReportedRS is set to 1 (value 'n1'), RSRP#1, a field of a predetermined number of bits (e.g., m bits) indicating the L1-RSRP of the largest measurement value, is included in the CSI report. In Rel. 15 NR, m=7.

[0076] For L1-RSRP reporting, if nrofReportedRS is set to a value greater than 1 or if groupBasedBeamReporting is enabled, the UE uses differential L1-RSRP-based reporting. Specifically, the UE includes, in the same CSI report (reporting instance), RSRP#1 indicating the L1-RSRP of the largest measured value and differential RSRP#k calculated for the kth (k=2, 3, 4 in FIG. 5) largest L1-RSRP by referring to the largest measured value (e.g., as a difference from the measured value). Here, differential RSRP#k may be a field of fewer bits (e.g., n bits) than the predetermined number. In Rel. 15 NR, n=4.

[0077] Note that when groupBasedBeamReporting is enabled, the UE includes RSRP#1 and differential RSRP#2 in the same CSI report.

[0078] CRI / SSBRI#k in FIG. 5 is a field indicating the CRI / SSBRI corresponding to RSRP#k or differential RSRP#k (included when reporting RSRP#k or differential RSRP#k).

[0079] In addition, in NRs from Rel. 16 onwards, nrofReportedRS may be a value equal to or greater than 4. A CSI report may include four or more sets of CRI / SSBRI and RSRP. The above m, n etc. are not limited to 7 and 4, respectively.

[0080] In addition, in NRs from Rel. 16 onwards, L1-SINR reporting may be performed. For the L1-SINR report, the RSRP in the above-mentioned L1-RSRP report may be replaced with SINR. In this case, the settings / parameters for SINR may be different from the settings / parameters for RSRP. For example, the above nrofReportedRS may be replaced with nrofReportedRSForSINR, which indicates the number of reference signal resources to be reported for SINR.

[0081] (Unified / Common TCI Framework) The unified TCI framework allows UL and DL channels to be controlled by a common framework. Instead of specifying TCI states or spatial relationships for each channel as in Rel. 15, the unified TCI framework may specify a common beam (common TCI state) and apply it to all UL and DL channels, or a common beam for UL may apply to all UL channels and a common beam for DL ​​may apply to all DL channels.

[0082] One common beam for both DL and UL, or one common beam for DL ​​and one common beam for UL (two common beams overall) are considered.

[0083] The UE may assume the same TCI state for UL and DL (joint TCI state, joint TCI pool, joint common TCI pool). The UE may assume different TCI states for UL and DL (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool).

[0084] The default beams for UL and DL may be aligned via MAC CE based beam management (MAC CE level beam indication). The default TCI state of the PDSCH may be updated to align with the default UL beam (spatial relationship).

[0085] DCI-based beam management (DCI-level beam indication) may indicate a common beam / unified TCI state from the same TCI pool for both UL and DL (joint common TCI pool, joint TCI pool, set). M (>1) TCI states may be activated by the MAC CE. The UL / DL DCI may select one from the M active TCI states. The selected TCI state may apply to both UL and DL channels / RS.

[0086] The TCI pool (set) may be multiple TCI states configured by RRC parameters, or multiple TCI states (active TCI states, active TCI pools, sets) activated by MAC CE among the multiple TCI states configured by RRC parameters. Each TCI state may be a QCL type A / D RS. SSB, CSI-RS, or SRS may be configured as the QCL type A / D RS.

[0087] In the example of Figure 6A, the RRC parameters (information elements) configure multiple TCI states for both DL and UL. The MAC CE may activate multiple TCI states from the configured multiple TCI states. The DCI may indicate one of the activated multiple TCI states. The DCI may be a UL / DL DCI. The indicated TCI state may apply to at least one (or all) of the UL / DL channels / RS. One DCI may indicate both the UL TCI and the DL TCI.

[0088] In the example of FIG. 6A, a point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL, respectively.

[0089] At least one of the multiple TCI states configured by the RRC parameters and the multiple TCI states activated by the MAC CE may be referred to as a TCI pool (common TCI pool, joint TCI pool, TCI state pool). The multiple TCI states activated by the MAC CE may be referred to as an active TCI pool (active common TCI pool).

[0090] In the present disclosure, higher layer parameters (RRC parameters) for setting multiple TCI states may be referred to as configuration information for setting multiple TCI states, or simply as "configuration information." Also, in the present disclosure, being instructed to set one of multiple TCI states using DCI may mean receiving indication information instructing one of the multiple TCI states included in DCI, or may simply mean receiving "instruction information."

[0091] In the example of Figure 6B, the RRC parameters configure multiple TCI states (joint common TCI pools) for both DL and UL. The MAC CE may activate multiple TCI states (active TCI pools) from the configured multiple TCI states. Separate active TCI pools for each of the UL and DL may be configured / activated.

[0092] The DL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) DL channels / RSs. The DL channels may be PDCCH / PDSCH / CSI-RS. The UE may determine the TCI state of each DL channel / RS using the TCI state behavior (TCI framework) of Rel. 16. The UL DCI or a new DCI format may select (indicate) one or more (e.g., one) TCI states. The selected TCI state may apply to one or more (or all) UL channels / RSs. The UL channels may be PUSCH / SRS / PUCCH. In this way, different DCIs may indicate UL TCI and DL DCI separately.

[0093] The existing DCI format 1_2 / 1_2 may be used to indicate the common TCI state.

[0094] A common TCI framework may have separate TCI states for DL ​​and UL.

[0095] The common TCI framework may have separate TCI states for DL ​​and UL. It is not preferred to use DCI format 1_1 / 1_2 to indicate common TCI states for UL only.

[0096] (UL Panel Selection) In future wireless communication systems (e.g., Rel. 17 and later), the TCI state update of Rel. 17 (e.g., TCI state activation by MAC CE+DCI / MAC CE) is being considered for fast UL panel selection. When multiple panels are applied, each panel may correspond to a different configuration (e.g., different number of ports / different beams). For example, UE panels may have the same or different number of antenna ports, number of beams, or equivalent isotopically radiated power (EIRP).

[0097] It is also assumed that a panel (or panel entity) corresponds to one or more reference signal resources (hereinafter also referred to as RS resources). In the case of CSI / beam reporting, the RS resource / RS resource set (hereinafter simply referred to as RS resources) is the RS related to the measurement / report. In the case of beam indication (e.g., beam indication), the RS resource corresponds to the source RS of UL TX spatial filter information (e.g., UL TX spatial filter information).

[0098] It is also assumed that the panel entity (or panel ID) corresponding to one RS resource may be different, and the problem arises as to how to achieve a common understanding between the UE and the base station regarding the panel entity corresponding to the RS resource (or TCI state).

[0099] In other words, considering cases where parameters such as the number of ports differ depending on the UE panel, it is necessary to properly achieve a common understanding between the base station and the UE regarding the panel corresponding to the RS resource for CSI / beam reporting, and to configure the base station so that it can make appropriate settings based on the report from the UE.

[0100] For example, whether or not the CSI / beam report supports the CRI / SSBRI to correspond to multiple panels becomes an issue. If the CSI / beam report supports the CRI / SSBRI to correspond to multiple panels and RSs corresponding to multiple panels are used as source RSs of TCIs for DL ​​QCLs or UL spatial filters, how to set / indicate panel information of the TCI (e.g., correspondence between TCI states and panels) becomes an issue.

[0101] Therefore, the present inventors have studied the correspondence between RS resources and panels, or the method of setting / indicating panel information corresponding to TCI, and have conceived the present invention.

[0102] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Each aspect (or the configuration / wireless communication method shown in each aspect) may be applied independently or in combination.

[0103] In the present disclosure, "A / B / C" and "at least one of A, B, and C" may be read as interchangeable. In the present disclosure, cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band may be read as interchangeable. In the present disclosure, index, ID, indicator, and resource ID may be read as interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be read as interchangeable.

[0104] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read interchangeably.

[0105] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC, RRC signaling, RRC parameters, higher layer, higher layer parameters, RRC information elements (IEs), and RRC messages may be read interchangeably.

[0106] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The 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.

[0107] In the present disclosure, MAC CE and activation / deactivation command may be read interchangeably.

[0108] In the present disclosure, the terms pool, set, group, list, and candidate may be read interchangeably.

[0109] In the present disclosure, DMRS, DMRS port, and antenna port may be read interchangeably.

[0110] In the present disclosure, the terms special cell, SpCell, PCell, and PSCell may be read interchangeably.

[0111] In the present disclosure, beam, spatial domain filter, spatial setting, TCI state, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, TCI assumption, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D for TCI state / QCL assumption, RS of QCL type A for TCI state / QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, and PL-RS may be read interchangeably. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, and SRS may be read interchangeably.

[0112] In the present disclosure, common beam, common TCI, common TCI state, unified TCI, unified TCI state, TCI state applicable to DL and UL, TCI state applicable to multiple (multiple types) channels / RS, TCI state applicable to multiple types of channels / RS, and PL-RS may be read interchangeably.

[0113] In the present disclosure, multiple TCI states configured by RRC, multiple TCI states activated by MAC CE, pool, TCI state pool, active TCI state pool, common TCI state pool, joint TCI state pool, separate TCI state pool, common TCI state pool for UL, common TCI state pool for DL, common TCI state pool configured / activated by RRC / MAC CE, and TCI state information may be read interchangeably.

[0114] In the present disclosure, the CC list, the serving cell list, the CC list in the cell group configuration (CellGroupConfig), the applicable list, the simultaneous TCI update list / the second simultaneous TCI update list, simultaneousTCI-UpdateList1-r16 / simultaneousTCI-UpdateList2-r16, the simultaneous TCI cell list, simultaneousTCI-CellList, the simultaneous spatial update list / the second simultaneous spatial update list, simultaneousSpatial-UpdatedList1-r16 / simultaneousSpatial-UpdatedList2-r16, the configured CC, the configured list, the BWP / CC in the configured list, all the BWPs / CCs in the configured list, the CC indicated by the activation command, the indicated CC, the CC that has received the MAC CE, and information indicating multiple cells for updating at least one of the TCI state and the spatial relationship may be read as interchangeable.

[0115] In the present disclosure, expressions such as "TCI state A is of QCL type D, the same as TCI state B," "TCI state A is the same as TCI state B," and "TCI state A is of QCL type D with TCI state B" may be interpreted interchangeably.

[0116] In the present disclosure, CSI-RS, NZP-CSI-RS, periodic (P)-CSI-RS, P-TRS, semi-persistent (SP)-CSI-RS, aperiodic (A)-CSI-RS, TRS, tracking CSI-RS, CSI-RS having TRS information (upper layer parameter trs-Info), NZP CSI-RS resource in an NZP CSI-RS resource set having TRS information, NZP-CSI-RS resource in an NZP-CSI-RS resource set consisting of multiple NZP-CSI-RS resources of the same antenna port, TRS resource, may be interpreted as interchangeable. In the present disclosure, CSI-RS resource, CSI-RS resource set, CSI-RS resource group, information element (IE), may be interpreted as interchangeable.

[0117] In the present disclosure, panel, Uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CONTROLLER RESOLUTION SET (CORESET)), PDSCH, codeword, base station, antenna port of a certain signal (e.g., Demodulation Reference Signal (DMRS) port), antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CORESET subset, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer) may be interchangeable. Also, panel identifier (ID) and panel may be interchangeable. In the present disclosure, the terms TRP ID, TRP Associated ID, CORESET Pool Index, the position of one of two TCI states corresponding to one code point of a field in a DCI (ordinal number, first TCI state or second TCI state), and TRP may be read interchangeably.

[0118] In the present disclosure, the terms TRP, transmission point, panel, DMRS port group, CORESET pool, and one of two TCI states associated with one code point in the TCI field may be read interchangeably.

[0119] In this disclosure, the terms "single TRP," "single TRP system," "single TRP transmission," and "single PDSCH" may be interchangeable. In this disclosure, the terms "multiple TRP," "multiple TRP system," "multiple TRP transmission," and "multiple PDSCH" may be interchangeable. In this disclosure, the terms "single DCI," "single PDCCH," "multiple TRP based on a single DCI," and "activating two TCI states on at least one TCI codepoint" may be interchangeable.

[0120] In the present disclosure, single TRP, channel using single TRP, channel using one TCI state / spatial relationship, multi-TRP not enabled by RRC / DCI, multiple TCI states / spatial relationships not enabled by RRC / DCI, a CORESETPoolIndex value of 1 not set for any CORESET, and no code point in the TCI field mapped to two TCI states may be read interchangeably.

[0121] In the present disclosure, "multi-TRP," "channel using multi-TRP," "channel using multiple TCI states / spatial relationships," "multi-TRP being enabled by RRC / DCI," "multiple TCI states / spatial relationships being enabled by RRC / DCI," and "at least one of multi-TRP based on a single DCI" and "multi-TRP based on multiple DCI" may be interchangeable. In the present disclosure, "multi-TRP based on multiple DCI," and "setting a CORESET pool index (CORESETPoolIndex) value of 1 for the CORESET" may be interchangeable. In the present disclosure, "multi-TRP based on a single DCI," and "at least one code point in the TCI field is mapped to two TCI states" may be interchangeable.

[0122] In the present disclosure, TRP#1 (first TRP) may correspond to CORESET pool index = 0 or may correspond to the first of two TCI states corresponding to one code point in the TCI field, and TRP#2 (second TRP) may correspond to CORESET pool index = 1 or may correspond to the second of two TCI states corresponding to one code point in the TCI field.

[0123] In the present disclosure, CORESET0, CORESET with index 0, and common CORESET may be read interchangeably.

[0124] In the present disclosure, the terms target, application destination, and destination may be interchangeable. In the present disclosure, the terms QCL source, source, and reference may be interchangeable.

[0125] (First aspect) In the first aspect, a case will be described in which control is performed so that multiple measurement results (e.g., L1-RSRP / L1-SINR) corresponding to multiple panels are not reported for measurement signal resources (e.g., CRI / SSBRI).

[0126] When a UE reports a measurement result (e.g., a CSI / beam report), the UE may transmit information about a signal resource for measurement and information about a panel (or an antenna group, an RS group, or a TCI state group). The information about a panel may be a panel ID (or an antenna group ID, an RS group ID, or a TCI state group ID).

[0127] The UE may control not to report multiple measurement results corresponding to multiple panels for one CRI / SSBRI in a CSI / beam report, i.e., in a CSI report, a single CRI / SSBRI (and corresponding measurement results) may correspond to one panel ID.

[0128] In this case, for example, control may be performed so that multiple panels are not set for one measurement signal (for example, CSI-RS / SSB). Alternatively, different measurement signals may be associated with each panel.

[0129] If the information about the panel (panel ID) is set to explicit, or if the UE explicitly reports the panel ID, the UE may be configured not to support (or allow) reporting multiple measurement results corresponding to multiple panel IDs for the same CRI / SSBRI (see Figure 7A).

[0130] 7A shows a case where the same RS corresponds to different panels in a certain measurement result report (here, CSI report #n). Here, CRI / SSBRI#1 (='00') and CRI / SSBRI#2 (='00') mean the same RS, and the same RS corresponds to different panel IDs (here, CRI / SSBRI#1 corresponds to panel ID #1, and CRI / SSBRI#2 corresponds to panel ID #2). The UE may be controlled not to report such CSI.

[0131] 7B shows a case where the same RS does not correspond to different panels (a single RS corresponds to each panel) in a report of a certain measurement result (here, CSI report #n). Here, CRI / SSBRI#1 (='00') and CRI / SSBRI#2 (='01') mean that they are different RSs, and the same RS does not correspond to different panel IDs. The UE may be allowed to report such CSI.

[0132] When information about a panel (panel ID) is implicitly configured or when a UE reports a panel ID implicitly, the UE may be configured not to support (or allow) reporting the same CRI / SSBRI for multiple groups (see FIG. 8A). As a method for implicitly configuring or implicitly reporting a panel ID, each panel ID may be associated with a group including one or more CRIs / SSBRIs and measurement results.

[0133] 8A shows a case where CRI#1-1 and CRI#1-2 (+RSRP / SINR#1-1 and RSRP / SINR#1-2) correspond to group #1, and CRI#2-2 and CRI#2-3 (+RSRP / SINR#2-2 and RSRP / SINR#2-3) correspond to group #2. Also, group #1 corresponds to panel ID#1, and group #2 corresponds to panel ID#2.

[0134] In Figure 8A, CRI#1-1 (='00') and CRI#2-2 (='00') mean that they are the same RS, but the same RS corresponds to different group / panel IDs (here, CRI#1-1 corresponds to group#1 / panel ID#1, and CRI#2-2 corresponds to group#2 / panel ID#2). The UE may be controlled not to report such CSI.

[0135] 8B shows a case where the same RS does not correspond to different groups (a single RS corresponds to each group) in a report of a certain measurement result (here, CSI report #n). Here, CRI #1-1 (='00') and CRI #2-2 (='01') mean that they are different RSs, and the same RS does not correspond to different groups (panels). The UE may be allowed to report such CSI.

[0136] In this way, by configuring a CSI report so that multiple measurement results corresponding to multiple panels are not reported for the same CRI / SSBRI, it becomes possible to directly infer DL / UL panel information (or TCI state corresponding to the panel) from the source RS of the TCI state (or source RS corresponding to the TCI state).

[0137] For example, since the base station can grasp the panel ID and TCI state from the CSI / beam report from the UE, the configuration may be such that the TCI state and the panel ID are not explicitly associated with each other.

[0138] (Second Aspect) In the second aspect, a case is described in which, in a report of a certain measurement result (e.g., a CSI / beam report), it is permitted to report multiple measurement results (e.g., L1-RSRP / L1-SINR) corresponding to multiple panels for a measurement signal resource (e.g., CRI / SSBRI).

[0139] In such a case, the panel information (or the association of the panel with the TCI state) may be set / indicated using at least one of the following options 1 to 3.

[0140] The RRC / MAC CE / DCI shown in the second aspect may be applied to a case where control is performed so that multiple measurement results (e.g., L1-RSRP / L1-SINR) corresponding to multiple panels are not reported for measurement signal resources (e.g., CRI / SSBRI).

[0141] <Option 1> DL / UL panel information (or association between panels and TCI states) may be determined / configured / indicated at the time of RRC configuration of the TCI state (for example, RRC configuration of TCI).

[0142] <<Option 1-1>> The panel ID may be included in the TCI state configuration information (e.g., TCI state configuration) (see FIG. 9A). FIG. 9A illustrates a case where the panel ID (or the TCI state group ID) is included in the higher layer parameters related to the TCI state. The UE may determine the association between the panel ID and the TCI state based on the higher layer parameters related to the TCI state notified from the base station.

[0143] <<Option 1-2>> A TCI status group may be set by an upper layer parameter, and a panel ID / TCI status group ID association may be set for each TCI status group (see FIG. 9B). FIG. 9B illustrates a case where the upper layer parameters related to the TCI status include a correspondence between the TCI status group and the panel ID. The UE may determine the association between the panel ID and the TCI status group based on the upper layer parameters related to the TCI status notified from the base station.

[0144] Note that the setting may be such that the same TCI state is not included in multiple TCI groups with different panel IDs / group IDs. In this case, the UE does not need to expect / assume that the same TCI state is included in multiple TCI groups with different panel IDs / group IDs.

[0145] <Option 2> The DL / UL panel information (or the association between the panel and the TCI state) may be determined / configured / indicated by the MAC CE when activating the TCI state.

[0146] <<Option 2-1>> The MAC CE used for activating the TCI state may include a field corresponding to a panel ID (or a TCI state group ID) and may support the indication of activation of TCI states corresponding to multiple panels (e.g., panel #1 and panel #2) respectively (see Figures 10A and 10B).

[0147] 10A and 10B show an example of a MAC CE having a field for reporting a panel ID and a field corresponding to a TCI state ID, which may include at least one of a field for a serving cell ID, a field for a BWP ID, and a field for a control resource set pool index ID.

[0148] The field corresponding to the TCI state ID may be configured with one bit for each TCI state ID, with '1' set for the TCI state to be activated.

[0149] FIG. 10A shows a case where a TCI state (e.g., a TCI state to be activated) corresponding to a first panel (e.g., panel ID #0) is indicated, and FIG. 10B shows a case where a TCI state (e.g., a TCI state to be activated) corresponding to a second panel (e.g., panel ID #1) is indicated.

[0150] Here, the case is shown in which TCI states #7, #10, and #12 are activated in panel ID #0, and TCI states #0, #2, #4, #6, and #9 are activated in panel ID #1.

[0151] A specific value (e.g., 8) may be set as the maximum number of TCI states activated in multiple panels (here, panel #0 and panel #1). Alternatively, the maximum number of TCI states activated in multiple panels (here, panel #0 and panel #1) may be set by higher layer signaling.

[0152] 10A and 10B, the number of TCI states activated in each panel may be set differently, which allows flexibility in setting the TCI states activated for each panel.

[0153] Alternatively, the number of TCI states activated in each panel may be controlled to be the same.

[0154] Also, a maximum number of TCI states that can be activated per panel may be defined, for example, the number of TCI states that can be activated on each panel may be set to the same number (e.g., 4).

[0155] The activated TCI states may be associated with code points in a predetermined field of the DCI (e.g., a field used to specify the TCI state). For example, the code points in the predetermined field used to indicate the TCI state may be mapped to the activated TCI states in multiple (or all) panels. The mapping between the activated TCI state IDs and the code points may be controlled based on predetermined rules.

[0156] [Rule 1] The code points of a predetermined field of the DCI may be mapped to the order of TCI state indexes among the activated TCI states (Ti) (see FIG. 11A). In this case, the number of TCI states activated for each panel ID may be controlled by a predetermined rule (e.g., equal for each panel) or by a setting by a higher layer. Alternatively, the number of TCI states activated for each panel ID may be set at the discretion of the base station (e.g., only the maximum number of TCI states to be activated is defined, and the base station may flexibly set it by MAC CE).

[0157] [Rule 2] For code points in a predetermined field of DCI, mapping may be performed first in the order of panel IDs, and then in the order of indices among the activated TCI states within the panel (see FIG. 11B). For example, for code points in a predetermined field of DCI, the activated TCI states for a particular panel ID (e.g., a panel ID with a smaller index) may be mapped in the order of TCI state indices, and then the activated TCI states for other panel IDs may be mapped in the order of TCI state indices.

[0158] The activation of the TCI state of the first panel and the activation of the TCI state of the second panel may be indicated separately using different MAC CEs (see Fig. 12). In this case, the UE may determine the mapping between the DCI codepoint and the TCI state based on the MAC CE (first MAC CE) indicating the activation of the TCI state of the first panel and the MAC CE (second MAC CE) indicating the activation of the TCI state of the second panel.

[0159] Alternatively, the instruction to activate the TCI state of the first panel and the instruction to activate the TCI state of the second panel may be performed using the same MAC CE (by a common MAC CE) (see Fig. 13). In this case, the TCI state field corresponding to the second panel ID does not always exist, but may be set / added to the MAC CE when multiple panels (e.g., the second panel) are set.

[0160] [Rule 3] One MAC CE may indicate the activated TCI state corresponding to each panel, and the TCI state may be mapped to a code point in a predetermined field of the DCI.

[0161] For example, one MAC CE may instruct the activation of up to M (e.g., M=8) TCI states for all panels. The correspondence (or mapping) between the activated TCI states and each panel may be determined based on a predetermined rule. For example, the first M1 of the activated TCI state indexes may correspond to a first panel, and the last M2 may correspond to a second panel. M1 and M2 may be the same (half and half) or different. M1 and M2 may be set by a higher layer.

[0162] By configuring the number of TCI states to be activated for each panel to be configurable separately, it is possible to flexibly control the allocation of activated TCI states corresponding to each panel.

[0163] FIG. 14 shows a case where the first M1 TCI states (here, TCI states #0, #2, #4, and #6) of the TCI states instructed to be activated are mapped to panel #0, and the last M2 TCI states (here, TCI states #7, #9, #10, and #12) are mapped to panel #1. In this way, by using the fields for each TCI state in one MAC CE in common for multiple panels, it is possible to suppress an increase in MAC CE overhead. Furthermore, the MAC CE shown in FIG. 14 may be configured not to include a field for notifying a panel ID.

[0164] If the number of panels is not configured or the number of TCI states to be activated is not configured, the UE may assume that all TCI states indicated for activation correspond to one panel, or alternatively, the UE may assume that the TCI states indicated for activation correspond to a predetermined number of panels (e.g., two panels).

[0165] <<Option 2-2>> The MAC CE used for activating the TCI state may include a field corresponding to a panel ID (or a TCI state group ID) and indicate activation of the TCI state corresponding to a single panel (see FIG. 15A). Also, a code point in a predetermined field included in the DCI may be associated with the TCI state corresponding to one panel (e.g., the TCI state activated for one panel by the MAC CE) (see FIG. 15B).

[0166] 15B shows a case where the TCI states activated for a first panel (e.g., panel #0) are mapped to the respective code points of the fields included in the DCI. That is, all TCI states activated by the MAC CE (here, TCI states #2, #5, #7, #9, #10, #12, #13, and #14) may correspond to the respective code points of a given field of one panel (e.g., panel #0) / DCI.

[0167] The maximum number of activated TCI states may be defined in the specification (e.g., 8) or may be set by higher layer signaling. In this case, the panel to which each codepoint included in the DCI corresponds may be separately indicated. This indication may be based on other fields in the DCI.

[0168] <<Option 2-3>> The MAC CE used for activating the TCI state may include a field corresponding to a panel ID (or a TCI state group ID) and may support the indication of activation of TCI states corresponding to multiple panels (e.g., panel #1 and panel #2) respectively (see Figures 16A-16C). Figures 16A and 16B show the case where the activated TCI state is specified using multiple bits, rather than setting a field corresponding to each TCI state (e.g., a one-bit field).

[0169] 16A shows an example of activated TCI states in a first panel (e.g., panel #0). Here, the case where at least the TCI state corresponding to TRP #1 (e.g., TCI state #0,1 = '0') and the TCI state corresponding to TRP #2 (e.g., TCI state #0,2 = '2') are activated is shown. TRP #1 may be replaced with CORESET pool index 0, and TRP #2 may be replaced with CORESET pool index 1.

[0170] 16B shows an example of activated TCI states in a second panel (e.g., panel #1), where at least the TCI state corresponding to TRP #1 (e.g., TCI state #0,1='3') and the TCI state corresponding to TRP #2 (e.g., TCI state #0,2='8') are activated.

[0171] As shown in Figure 16C, the TCI states activated by the MAC CE (e.g., the TCI states activated for each panel) may be mapped to each code point in a predetermined field included in the DCI. The mapping method between each code point and the TCI state corresponding to each panel may be first in the order of the panel ID, and then in the order of the index i of the activated TCI states (TCI IDi,j) within the panel. Note that the mapping rule is not limited to this, and at least one of the above rules 1 to 3 may also be applied.

[0172] Figure 16A shows a case where TCI state #0 corresponding to TRP #1 and TRP #2 is activated, so that the TCI state pair (here, '0' and '2') is mapped to the same code point. Similarly, Figure 16B shows a case where TCI state #0 corresponding to TRP #1 and TRP #2 is activated, so that the TCI state pair (here, '3' and '8') is mapped to the same code point.

[0173] Each code point in a predetermined field of the DCI may be mapped to one or two TCI states. The maximum number of TCI state pairs (or DCI code points) that are activated in multiple (e.g., all) panels may be set to a predetermined value (here, 8).

[0174] The maximum number of TCI state pairs (or corresponding DCI code points) to be activated for each panel may be defined. Although Fig. 16C illustrates a case where a maximum of four TCI state pairs are activated for each of Panel #0 and Panel #1, this is not limiting.

[0175] <<Option 2-4>> The MAC CE used for activating the TCI state may include a field corresponding to a panel ID (or a TCI state group ID) and indicate activation of the TCI state corresponding to a single panel (see FIG. 17A). In FIG. 17A, instead of setting a field corresponding to each TCI state (e.g., a one-bit field), the TCI state to be activated is specified using multiple bits.

[0176] Here, the case where at least the TCI state corresponding to TRP #1 (e.g., TCI state #0,1 = '0') and the TCI state corresponding to TRP #2 (e.g., TCI state #0,2 = '2') are activated is shown. TRP #1 may be read as CORESET pool index 0, and TRP #2 may be read as CORESET pool index 1.

[0177] Furthermore, each code point in a predetermined field included in the DCI may be associated with a TCI state corresponding to one panel (e.g., one or two TCI states activated for one panel by the MAC CE) (see FIG. 17B).

[0178] Here, TCI state #0 corresponding to TRP #1 and TRP #2 is activated, so that the TCI state pair (here, '0' and '2') is mapped to the same code point.

[0179] Each code point in a given field of the DCI may be mapped to one or two TCI states. The maximum number of TCI state pairs (or DCI code points) that can be activated in a panel may be set to a predetermined value (here, 8).

[0180] <<Option 2-5>> The MAC CE used for activating the TCI state may include a field corresponding to each panel ID (or TCI state group ID) and may support simultaneous indication of activation of TCI states corresponding to multiple panels (e.g., panel #1 and panel #2) (see FIG. 18A).

[0181] 18A illustrates a case where the activated TCI states are specified using multiple bits, rather than setting a field (e.g., a one-bit field) corresponding to each TCI state. Also, the same MAC CE may specify the activated TCI states for multiple panels. Here, the case is illustrated where, among the activated TCI states, TCI states #0 and #1 corresponding to TRP #1 correspond to a first panel (e.g., panel #0), and TCI states #0 and #2 corresponding to TRP #2 correspond to a second panel (e.g., panel #1).

[0182] Furthermore, each code point in a predetermined field included in the DCI may be associated with a TCI state of one or two panels (e.g., one or two TCI states activated for one or two panels by the MAC CE) (see Figure 18B).

[0183] Here, the TCI state #0 corresponding to TRP #1 (or panel #0) and TRP #2 (or panel #1) is activated, so the TCI state pair (here, '0' and '2') is mapped to the same code point. In this case, different TRPs can be associated with each panel. This allows the appropriate association between each panel and the TCI state to be set even when multiple panels correspond to different TRPs.

[0184] Each code point in a given field of the DCI may be mapped to one or two TCI states. The maximum number of TCI state pairs (or DCI code points) that can be activated in a panel may be set to a predetermined value (here, 8).

[0185] In the Rel. 16 MAC CE for single DCI-based multi-TRP, one codepoint corresponds to one or two activated TCI states. For DCI codepoint '000', the first TCI State ID field is always present, and the second active TCI state field is an optional field that is present when the TCI state presence field (C field) is '1' (see Figures 19A and 19B).

[0186] The existing MAC CE configuration may be used as a TCI state activation indication for multi-panel (Rel. 17 or later). In this case, the UE may be instructed whether to use it as a TCI state activation indication for single DCI-based multi-TRP (Rel. 16) or as a TCI state activation indication for multi-panel (Rel. 17 or later). For example, the R field included in the MAC CE may be used to notify the UE of which purpose it will be used for. When a predetermined upper layer parameter is configured, the UE may determine the purpose of the MAC CE based on the R field (or the switching indication field).

[0187] Furthermore, the presence or absence of a field for the second TCI state may be specified by the C field included in the MAC CE. For example, if two panels are activated for TCI state #0, the field for the second TCI state may be present and two TCI states may be mapped to the DCI codepoint (see FIG. 19B).

[0188] <Option 3> DL / UL panel information (or the association between the panel and the TCI status) may be determined when the TCI status is indicated by the DCI. For example, the panel ID may be notified using a predetermined field included in the DCI. The predetermined field may be provided separately from the field for notifying the TCI status, or the number of bits in the field for notifying the TCI status may be increased and used to notify the panel ID.

[0189] <<Option 3-1>> Panel information (e.g., a field for panel ID notification) may not be included in the MAC CE (see FIG. 20A), and a field for panel notification (e.g., a panel field) may be set in the DCI (see FIG. 20B). Here, the case where the field for panel notification is set separately from the field for TCI status notification is shown. The TCI status activated in the MAC CE is mapped to the code point of the field for TCI status notification.

[0190] The panel notification field included in the DCI may be present only under a predetermined condition, which may be, for example, when one or more DCI formats (e.g., DCI format 1_1 / 1_2 or DCI format 0_1 / 0_2) are configured by higher layer signaling.

[0191] When the DCI for beam direction for the common TCI framework is performed using DCI format 1_1 / 1_2 without DL assignment (e.g., DL assignment), the DCI field for DL ​​assignment is not used. In such a case, the unused field may be used as a field for panel notification.

[0192] <<Option 3-2>> Panel information (e.g., a field for notifying a panel ID) is included in the MAC CE (see FIG. 21A), and the TCI state is activated for each panel. Alternatively, a field for notifying a panel (e.g., a panel field) may be set in the DCI (see FIG. 21B). Here, the case where the field for notifying a panel is set separately from the field for notifying a TCI state is shown. Note that any of the configurations shown in Option 2 may be applied to the MAC CE configuration.

[0193] The TCI state activated in the MAC CE is mapped to the code point of the TCI state notification field. The code point of the TCI state notification field of the DCI and the mapping of the TCI state may be set differently for each panel.

[0194] Also, the code points (e.g., '0' and '1') in the panel notification field may correspond to TCI states corresponding to different panels. Figure 21B shows a case where the code point '0' in the panel notification field corresponds to the activated TCI state of panel #0, and the code point '1' in the panel notification field corresponds to the activated TCI state of panel #1.

[0195] The mapping between the codepoint of the TCI status indication field and the TCI status may be applied taking into account the panel indication field, and the UE can determine the TCI status corresponding to each panel based on the codepoint of the TCI status indication field and the panel specified in the panel indication field.

[0196] (Variation 1) In Options 2-1 / 2-3 / 2-5 / 3-2, the activated TCI state may be configured to correspond to a plurality of panels (Configuration 1), or may not be configured to correspond to a plurality of panels (Configuration 2).

[0197] <Configuration 1> For example, when a TCI state is activated by a MAC CE, the UE may not assume that the activated TCI state is associated with multiple panels. For example, the UE may not assume a MAC CE as shown in Figures 22A and 22B (here, the case where TCI state #0 is activated in both panel #0 and panel #1).

[0198] Alternatively, the UE may assume that when a TCI state is activated by a MAC CE, the activated TCI state may be associated with multiple panels. For example, the UE may assume a MAC CE as shown in Figures 22A and 22B (here, the case where TCI state #0 is activated in both panel #0 and panel #1).

[0199] In this case, the same TCI state (here, TCI state #0) corresponding to a different panel may be mapped to a different code point in the TCI state notification field (see FIG. 22C).

[0200] For example, for the DCI codepoints of Option 2-1, at least one of Rules 1 to 3 of Option 2-1 may be used. Alternatively, the codepoints of the TCI status notification field of the DCI may be mapped (or associated) with the TCI statuses activated in all panels in the order of the index i of Ti first, and then the panel IDs (or TCI status group IDs).

[0201] (Variation 2) When a Panel ID is set / indicated for a joint DL / UL TCI, the Panel ID / Panel Information may apply to both DL and UL, UL only, or DL ​​only.

[0202] If a Panel ID is set / indicated for a separate DL TCI, the Panel ID / Panel Information may apply to the DL only.

[0203] If a Panel ID is set / indicated for a separate UL TCI, the Panel ID / Panel Information may apply to the UL only.

[0204] When two panel IDs are configured / indicated by the RRC / MAC CE / DCI, the two panel IDs may be applied to the DL and UL.

[0205] Figure 23A shows the case where the Panel ID for DL ​​and the Panel ID for UL are configured by RRC (e.g., higher layer parameters related to TCI state), while Figure 23B shows the case where MAC CE supports notification of activated TCI state in Panel ID for UL and Panel ID for DL.

[0206] In a MAC CE, if joint DL / UL TCI is activated, two panels may be used for DL ​​and UL, respectively. In a MAC CE, if separate DL / UL TCI is activated, two panels may be used for DL ​​TCI and UL TCI, respectively.

[0207] For joint DL / UL TCI, two panels each may be used for DL ​​and UL, with a common source reference RS for DL ​​and UL.

[0208] For a separate DL / UL TCI, two panels may be utilized for the DL TCI and two for the UL TCI.

[0209] A joint DL / UL TCI may be included in two groups for DL ​​and UL (a TCI state group for DL ​​and a TCI state group for UL) (see Figures 24A and 24B). Figure 24A shows a case where a panel ID (or a TCI state group ID) is set for a TCI state group for DL ​​(TCI-state-group for DL) in the higher layer parameters related to the TCI state. In this case, the panel may be applied only to the DL / DL TCI.

[0210] 24B shows a case where a panel ID (or a TCI state group ID) is set for a TCI state group for UL (TCI-state-group for UL) in the higher layer parameters related to the TCI state. In this case, the panel may be applied only to the UL / UL TCI.

[0211] (Variation 3) In each option of the second aspect, the UE may apply at least one of the following UE Actions 1 to 3.

[0212] <UE Action 1> The UE may expect to be provided with a Panel ID (or TCI State Group ID) for each TCI state.

[0213] <UE Operation 2> The UE may or may not expect a panel ID (or a TCI state group ID) to be provided for the TCI state. For example, if a panel ID (or a TCI state group ID) is not provided, the UE may autonomously determine panel selection for DL / UL (UE implementation).

[0214] <UE Action 3> Alternatively, if the Panel ID (or the TCI Status Group ID) is not provided, a specific value or a default value may be applied as the Panel ID (or the TCI Status Group ID). The specific value or the default value may be, for example, 0 (or 1).

[0215] (UE Capability Information) In the above-described first and second aspects, the following UE capabilities may be configured. Note that the following UE capabilities may be interpreted as parameters (e.g., higher layer parameters) configured in the UE from a network (e.g., a base station).

[0216] UE capability information regarding whether multiple UE panels are supported may be defined.

[0217] UE capability information regarding the number of UE panels may be defined.

[0218] UE capability information regarding whether a different number of antenna ports / beams / RSs is supported for each UE panel may be defined.

[0219] UE capability information regarding the maximum number of antenna ports / beams / RSs that can be set / instructed for DL / UL of each panel may be defined.

[0220] In the CSI / beam report, UE capability information regarding whether or not panel ID is supported may be defined.

[0221] UE capability information may be defined regarding whether or not group-based CSI / beam reporting is supported, with each group corresponding to a panel.

[0222] UE capability information regarding whether or not to support beams (e.g., CRI / SSBRI) corresponding to multiple panels in the CSI / beam report may be defined.

[0223] UE capability information may be defined regarding whether or not to support a panel ID (or a TCI state group ID) set / indicated in an RRC for TCI state setting / MAC CE for TCI state activation / DCI for TCI state indication.

[0224] UE capability information regarding the maximum number of activated TCI states may be defined.

[0225] UE capability information regarding the maximum number of TCI states that can be activated per panel may be defined.

[0226] The first and second aspects may be applied to a UE that supports / reports at least one of the above-mentioned UE capabilities, or may be applied to a UE configured by the network.

[0227] (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.

[0228] 25 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0229] 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.

[0230] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (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.

[0231] 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 SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0232] 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 located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 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.

[0233] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0234] 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 higher than 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 correspond to a higher frequency band than FR2.

[0235] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0236] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., 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.

[0237] 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), a Next Generation Core (NGC), and the like.

[0238] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0239] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless 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).

[0240] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0241] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user 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.

[0242] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0243] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0244] 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.

[0245] 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 a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0246] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching 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 the CORESET associated with a certain search space based on the search space configuration.

[0247] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0248] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation 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.

[0249] 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.

[0250] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0251] 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 an SS (PSS, SSS) and a PBCH (and a 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 a reference signal.

[0252] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like 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).

[0253] 26 is a diagram showing an example of the configuration of a base station according to an embodiment. 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.

[0254] 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.

[0255] 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.

[0256] 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, control information, sequences, etc. to be transmitted as signals, 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.

[0257] 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.

[0258] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0259] 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 relates, such as an array antenna.

[0260] 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.

[0261] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0262] The transmitter / receiver unit 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.

[0263] The transmitter / receiver unit 120 (transmission processing unit 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.

[0264] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0265] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0266] 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.

[0267] 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.

[0268] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0269] 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.

[0270] The transmitter / receiver 120 may transmit information related to the resource of the measurement signal. When a measurement result of the measurement signal is reported from a terminal, the controller 110 may perform control so that multiple measurement results corresponding to multiple panel IDs are not reported for the same resource identifier of the measurement signal.

[0271] The transmitter / receiver 120 may transmit information relating to an association between a transmission configuration indicator (TCI) and a panel ID to the terminal. When a measurement result of a measurement signal is reported from the terminal, the controller 110 may support receiving a report of multiple measurement results corresponding to multiple panels for the same resource identifier of the measurement signal.

[0272] (User Terminal) Fig. 27 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0273] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0274] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0275] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may 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.

[0276] 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 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.

[0277] 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.

[0278] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0279] 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.

[0280] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0281] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0282] The transmitter / receiver unit 220 (transmission processing unit 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.

[0283] 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 if not, it may not be necessary to perform DFT processing as the transmission processing.

[0284] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0285] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0286] The transceiver unit 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, and acquire user data, etc.

[0287] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, 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.

[0288] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220, the transmitting / receiving antenna 230, and the transmission path interface 240.

[0289] The transmitting / receiving unit 220 may receive information related to the resource of the measurement signal. When reporting the measurement result of the measurement signal, the control unit 210 may perform control so as not to report multiple measurement results corresponding to multiple panel IDs for the same resource identifier of the measurement signal.

[0290] The information about the measurement signal resource may be information about resource identifiers of measurement signals associated with multiple panel IDs. The information about the measurement signal may be information about resource identifiers of one or more measurement signals included in a group corresponding to a panel. The control unit 210 may perform control so that the same measurement reference signal resource identifier is not reported in multiple groups.

[0291] The transmitter / receiver 220 may receive information relating to an association between a transmission configuration indicator (TCI) and a panel ID. When reporting a measurement result of a measurement signal, the controller 210 may support reporting of multiple measurement results corresponding to multiple panels for the same resource identifier of the measurement signal.

[0292] Information about the panel ID may be included in the upper layer parameters used to set the TCI state. Information about the panel ID may be included in the MAC CE used to activate the TCI state. The association between the TCI and the panel ID is notified by the code point of the field used to notify the TCI state included in the downlink control information, or the code point of the field used to notify the TCI state included in the downlink control information and the code point of another field.

[0293] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0294] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0295] For example, a base station, a user terminal, 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. Figure 28 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user 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.

[0296] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user 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.

[0297] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0298] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0299] 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.

[0300] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes 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 implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0301] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0302] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0303] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). 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.

[0304] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0305] 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.

[0306] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0307] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0308] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0309] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0310] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0311] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0312] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0313] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0314] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0315] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0316] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0317] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0318] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0319] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0320] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0321] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0322] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0323] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0324] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0325] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0326] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0327] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0328] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0329] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0330] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0331] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0332] 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 thereof.

[0333] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0334] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0335] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0336] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0337] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0338] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0339] 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 domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0340] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0341] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0342] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0343] A mobile station may also 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, or some other suitable terminology.

[0344] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0345] Furthermore, a base station in the present disclosure may be read as a user 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 user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user 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 terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0346] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0347] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0348] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0349] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are based on these and are extended thereto. In addition, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0350] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0351] 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.

[0352] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0353] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0354] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "deciding" some action.

[0355] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0356] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0357] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0358] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0359] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0360] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0361] 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.

[0362] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiving unit that receives a Medium Access Control Element (MAC CE) that associates two Transmission Configuration Indication (TCI) states with one code point, and receives Downlink Control Information (DCI) that includes a field other than the TCI field; and a control unit that determines one of the two TCI states based on the other field.

2. The terminal of claim 1, wherein the two TCI states correspond to a first transmission / reception point (TRP) and a second TRP, respectively.

3. A method for receiving a Medium Access Control Element (MAC CE) that associates two Transmission Configuration Indication (TCI) states with one code point, and receiving Downlink Control Information (DCI) that includes a field other than the TCI field; determining one of the two TCI states based on the other field.

4. A transmitter that transmits a Medium Access Control Element (MAC CE) that associates two Transmission Configuration Indication (TCI) states with one code point, and transmits Downlink Control Information (DCI) that includes a field other than the TCI field; and a control unit that determines that one of the two TCI states is determined based on the other field.

5. A system including a terminal and a base station, The terminal includes: A receiver that receives a Medium Access Control Element (MAC CE) that associates two Transmission Configuration Indication (TCI) states with one code point, and receives Downlink Control Information (DCI) that includes a field other than the TCI field; and a control unit for determining one of the two TCI states based on the other field; The base station, A system comprising a transmitter for transmitting the MAC CE and for transmitting the DCI.