Terminal, wireless communication method, base station and system

Abstract

A terminal according to an aspect of the present disclosure is characterized by comprising: a reception unit that receives an upper layer parameter indicative of information on a tracking channel-state information reference signal (CSI-RS) (TRS); and a control unit that expects, for a CSI-RS resource that has been configured together with the information, that a transmission configuration indication (TCI) state will indicate a QCL type that corresponds to a synchronization signal / physical broadcast channel (SS / PSCH) block having a physical cell ID (PCI) different from the PCI of a serving cell. According to an aspect of the present disclosure, at least either the TCI state or QCL type that is implemented if a non-serving cell has been applied is appropriately indicated.

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, it is expected that communications will be controlled based on inter-cell mobility including cells (non-serving cells) having a PCI different from the physical cell ID (PCI) of the serving cell, or inter-cell mobility using multiple transmission / reception points (e.g., Multi-TRP (MTRP)).

[0006] However, it is unclear how to indicate the TCI state and / or QCL type when a non-serving cell is applied.

[0007] The present disclosure has been made in consideration of such points, and one of its objectives is to provide a terminal, a wireless communication method, and a base station that are capable of appropriately indicating at least one of the TCI state and QCL type when a non-serving cell is applied.

[0008] A terminal according to one aspect of the present disclosure is characterized by having a receiving unit that receives higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS), and a control unit that expects that for a CSI-RS resource configured with the information, a transmission configuration indication (TCI) state indicates a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PSCH) block having a physical cell identity (PCI) different from the PCI of the serving cell.

[0009] According to one aspect of the present disclosure, indication of the TCI state and / or QCL type when a non-serving cell is applied is suitably provided.

[0010] Figures 1A and 1B illustrate an example of inter-cell mobility. Figure 2 illustrates a TCI state corresponding to CSI-RS associated with SSBs of a non-serving cell. Figure 3 illustrates an example of a relationship between beam reporting and regeneration indexes. Figure 4 illustrates an example of an inter-cell scenario in multi-DCI-based multi-TRP. Figure 5A illustrates the maximum number of additional PCIs for Case 1. Figure 5B illustrates the maximum number of additional PCIs for Case 2. Figure 6 illustrates an example of overlapping UL transmissions between SSBs from a serving cell and SSBs from a cell with additional PCIs. Figure 7A illustrates TCI states in Rel. 15 and configured DL / joint TCI states in Rel. 17. Figure 7B illustrates indicated DL / joint TCI states. Figure 8 illustrates an example of a QCL relationship of TRSs in Aspect 1.1. Figure 9 illustrates an example of a QCL relationship of CSI-RSs in Aspect 1.2. Figure 10 illustrates an example of a schematic configuration of a wireless communication system according to an embodiment. Fig. 11 is a diagram illustrating an example of the configuration of a base station according to an embodiment. Fig. 12 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. Fig. 13 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. Fig. 14 is a diagram illustrating an example of a vehicle 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] 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.

[0021] 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.

[0022] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0023] The channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), or simply a target, and the other signal may be called a reference reference signal (reference RS), a source RS, or simply a reference.

[0024] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH), and a physical uplink control channel (PUCCH).

[0025] Furthermore, the RS that has a QCL relationship with the channel may be at least one of, for example, 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)), a QCL detection reference signal (also called a QRS), a demodulation reference signal (DMRS), etc.

[0026] 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.

[0027] 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.

[0028] (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).

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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).

[0034] 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.

[0035] 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.

[0036] 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.

[0037] As CSI feedback methods, periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI, AP-CSI) reporting, semi-persistent CSI (SP-CSI) reporting, etc. are being considered.

[0038] The UE may be notified of the CSI measurement configuration information using higher layer signaling, physical layer signaling, or a combination thereof.

[0039] 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.

[0040] The RRC information elements (or RRC parameters) related to CSI reporting configuration and CSI resource configuration will be described.

[0041] 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").

[0042] 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.

[0043] 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").

[0044] 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 (AP-CSI-RS), SP-CSI-RS, or P-CSI-RS.

[0045] 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.

[0046] (Inter-cell mobility) In NR, one or more transmission / reception points (Transmission / Reception Points (TRPs)) (multi-TRPs (MTRPs)) are considered to perform DL transmission to a UE. Also, it is considered that a UE performs UL transmission to one or more TRPs.

[0047] During inter-cell mobility (e.g., L1 / L2 inter cell mobility), a UE may receive channels / signals from multiple cells / TRPs (see Figures 1A and 1B).

[0048] FIG. 1A illustrates an example of inter-cell mobility (e.g., single-TRP inter-cell mobility) including non-serving cells. A UE may be configured with one TRP (or single TRP) in each cell. Here, the UE receives channels / signals from the base station / TRP of cell #1, which is the serving cell, and the base station / TRP of cell #3, which is not the serving cell (non-serving cell). For example, this corresponds to a case where the UE switches / switches from cell #1 to cell #3 (e.g., a fast cell switch).

[0049] In this case, the selection of the port (e.g., antenna port) / TRP may be performed dynamically or based on the TCI status indicated or updated by the DCI / MAC CE. Here, it is shown that different Physical Cell Identifier (PCI) configurations are supported for cell #1 and cell #3.

[0050] FIG. 1B illustrates an example of a multi-TRP scenario (e.g., multi-TRP inter-cell mobility). A UE may be configured with multiple (e.g., two) TRPs (or different CORESET pool indices) in each cell. Here, the UE receives channels / signals from TRP #1 and TRP #2. Also, here, TRP #1 corresponds to physical cell ID (PCI) #1, and TRP #2 corresponds to PCI #2.

[0051] The multi-TRPs (TRPs #1 and #2) may be connected via an ideal / non-ideal backhaul to exchange information, data, etc. The same or different code words (CWs) and the same or different layers may be transmitted from each TRP of the multi-TRP. As shown in FIG. 1B, non-coherent joint transmission (NCJT) may be used as one form of multi-TRP transmission. This example illustrates the case where NCJT is performed between TPRs corresponding to different PCIs. The same serving cell configuration may be applied / configured for TRPs #1 and #2.

[0052] Multiple PDSCHs (multi-PDSCHs) that are non-coherent may be defined as partially or completely overlapping in time and / or frequency domains. That is, the first PDSCH from TRP #1 and the second PDSCH from TRP #2 may overlap in time and / or frequency resources. The first PDSCH and the second PDSCH may be used for transmission of the same TB or for transmission of different TBs.

[0053] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0054] Multiple PDSCHs from multiple TRPs (which may be referred to as multiple PDSCHs) may be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single master mode). One DCI may be transmitted from one TRP of a multi-TRP. A configuration using one DCI in a multi-TRP may be referred to as single DCI-based multi-TRP (mTRP / MTRP).

[0055] Multiple PDSCHs from a multi-TRP may be scheduled using multiple DCIs (multiple DCI (M-DCI), multiple PDCCHs (multiple PDCCHs)), respectively (multiple master mode). Multiple DCIs may be transmitted from multiple TRPs, respectively. A configuration that utilizes multiple DCIs in a multi-TRP may be referred to as a multi-DCI-based multi-TRP (mTRP / MTRP).

[0056] It may be assumed that the UE transmits separate CSI reports (CSI reports) for different TRPs. Such CSI feedback may be referred to as separate feedback, separate CSI feedback, etc. In this disclosure, "separate" may be interchangeably read as "independent."

[0057] It is assumed that in Rel. 17 NR and later, the MAC CE / DCI will support beam direction to a TCI state associated with a different PCI, and that in Rel. 18 NR and later, the MAC CE / DCI will support direction of a serving cell change to a cell with a different PCI.

[0058] By using the above-described inter-cell mobility (e.g., L1 / L2 inter-cell mobility), a UE can transmit and receive UL / DL channels / RSs to and from a cell having a PCI different from the PCI of the serving cell. For example, if the RSRP of a non-serving cell is higher than the RSRP of the serving cell, the UE can transmit and receive UL / DL channels / RSs to and from the non-serving cell without handover.

[0059] Figure 2 shows the TCI states corresponding to CSI-RS related to SSBs of non-serving cells. PCIs #1 and #3 in Figure 2 correspond to PCIs #1 and #3 in Figures 1A and 1B. When inter-cell mobility shown in Figure 1A is performed, the UE switches the TCI state used for DL ​​reception from TCI state #1 to TCI state #2.

[0060] <Beam Report and Rebuild Index> Figure 3 is a diagram showing an example of the relationship between a beam report and a rebuild index. As shown in Figure 3, a beam report (CSI report) of a non-serving cell includes an RSRP value and a CRI or SSBRI. The CRI or SSBRI is associated with a rebuild index (ID for PCI).

[0061] The rebuild index is a newly created index based on the PCI and is associated with at least a part of the PCI. The rebuild index is configured in the UE by the RRC and may be assigned a value up to 7 corresponding to an additional PCI (of a non-serving cell). When the rebuild index (ID) is 0, it may represent the serving cell (PCI of the serving cell). The rebuild index can be represented with fewer bits than the PCI, thereby reducing communication overhead.

[0062] <Multi-TRP Inter-Cell Scenario> The following describes an inter-cell scenario (inter-cell mobility) in a multi-DCI-based multi-TRP scenario. When multi-TRP is applied, a coresetPoolIndex is configured. As shown in Figure 4, an additional PCI is associated with an activated TCI state (SSB as QCL source RS) corresponding to PDSCH / PDCCH. One PCI is associated with an activated TCI state corresponding to one coresetPoolIndex.

[0063] Also, as shown in Figure 4, the PCI of the serving cell is always associated with an active TCI state, and the additional PCI (SSB corresponding to the additional PCI) is associated with only one active TCI state. Rate matching around the SSB associated with the PCI of the serving cell may be performed for the PDCCH / PDSCH corresponding to the serving cell. Also, rate matching around the SSB associated with the additional PCI may be performed for the PDCCH / PDSCH corresponding to the additional PCI. Also, the shared search space (CSS) of type 0 / 0A / 1 / 2 may not be monitored.

[0064] Note that the serving cell and the cell with the additional PCI may have the same center frequency, Subcarrier Spacing (SCS), and System Frame Number (SFN) offset. The number of additional PCIs configured by RRC may be up to seven. The UE may also report UE capabilities indicating the maximum number X of additional PCIs.

[0065] The following two cases are possible for X, which is the maximum number of additional PCIs configured as UE capabilities. Note that Case 1 and Case 2 do not have to be enabled at the same time. [Case 1] X indicates the maximum number of additional PCIs whose corresponding "position and period of the SSB time field" are the same as those of the serving cell (this X is designated as X1). [Case 2] X indicates the maximum number of additional PCIs whose corresponding "position and period of the SSB time field" are partially or entirely different from those of the serving cell (this X is designated as X2).

[0066] Fig. 5A is a diagram showing the maximum number of additional PCIs in case 1. In Fig. 5A, X1 is 4. Fig. 5B is a diagram showing the maximum number of additional PCIs in case 2. In Fig. 5B, X2 is 8.

[0067] 6 illustrates an example of an overlap of an UL transmission with an SSB from a serving cell or an SSB from a cell with an additional PCI. The UE may cancel an UL transmission if it overlaps in time with an SSB from the serving cell or an SSB from a cell with an additional PCI associated with an active TCI state.

[0068] In the QCL-related rules being considered for adoption in Rel. 17, for DMRS of PDCCH / PDSCH, the configured DL / joint TCI state is specified as "DLorJointTCIState" except for the indicated "DLorJointTCIState". The indicated TCI state applies to multiple UL / DL channels / RSs. The configured TCI state applies only to the channel / RS.

[0069] Figure 7A shows the TCI states in Rel. 15 and the configured DL / joint TCI states in Rel. 17. Figure 7B shows the indicated DL / joint TCI states. Figure 7B differs from Figure 7A in that the relationship in the third row is not supported. "Configured" may mean configured by higher layer (RRC) signaling. "Indicated" may mean indicated by DCI.

[0070] (Antenna Port Quasi Co-location (QCL)) The section on antenna port QCL in Rel. 17 specifies the Tracking Reference Signal (TRS) as follows: Note that NZP-CSI-RS-ResourceSet is a higher layer parameter for the non-zero power CSI-RS resource set.

[0071] For periodic CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, the UE expects the TCI state to indicate one of the following QCL types: (1) "type C" corresponding to the SS / PBCH block and, if applicable, "type D" corresponding to the same SS / PBCH block, or (2) "type C" corresponding to the CSI-RS in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition and, if applicable, "type D".

[0072] In the antenna port QCL of Rel. 17, it is being considered to specify the CSI-RS corresponding to repeated transmission as follows.

[0073] For CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition, the UE expects the TCI state to indicate one of the following QCL types (1) to (3): (1) "type A" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and "type D" corresponding to the same CSI-RS resources, if applicable; (2) "type A" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and "type D" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition; (3) "type C" corresponding to the SS / PBCH block, and "type D" corresponding to the same SS / PBCH block, if applicable. This reference RS may additionally be an SS / PBCH block with a PCI different from that of the serving cell. The UE may assume that the center frequency, SCS, and SFN offset are the same for SS / PBCH blocks from the serving cell and SS / PBCH blocks with a PCI different from that of the serving cell.

[0074] (NZP CSI-RS) It is being considered to specify the following in the NZP CSI-RS section of Rel. 17: This section does not prohibit a CSI-RS (including a TRS) from being further associated with an SSB that has an additional PCI.

[0075] The parameters for the UE to assume non-zero transmit power for CSI-RS resources, which are configured via the higher layer parameters NZP-CSI-RS-Resource, CSI-ResourceConfig, and NZP-CSI-RS-ResourceSet for each CSI-RS resource configuration, include, for example, the following (1) qcl-InfoPeriodicCSI-RS. (1) qcl-InfoPeriodicCSI-RS includes a reference to a TCI state indicating the QCL source RS(s) and the QCL type. If the TCI state is configured with a reference to an RS with the QCL type set to Type D, the RS may be an SS / PBCH block located in the same or a different CC / DL BWP, or a CSI-RS resource configured as periodic (periodic) located in the same or a different CC / DL BWP. The reference RS may additionally be an SS / PBCH block associated with a PCI different from the PCI of the serving cell.

[0076] (Analysis) As described above, it is expected that future wireless communication systems will control communications based on inter-cell mobility including cells (non-serving cells) having a PCI different from the physical cell ID (PCI) of the serving cell, or inter-cell mobility using multiple transmission / reception points. However, it is unclear how to indicate at least one of the TCI state and QCL type when a non-serving cell is applied. For example, it is unclear whether the TCI state of a TRS / CSI-RS can indicate a QCL type corresponding to a reference signal (corresponding to a non-serving cell) having a PCI different from the physical cell ID (PCI) of the serving cell.

[0077] For example, except for Case 2 in the TCI state of Rel. 15 and the configured DL / joint TCI state of Rel. 17 shown in Figure 7A, the TRS is required as a QCL Type A RS. However, it is unclear whether a non-serving cell SSB can be used as the QCL source RS for the TRS. Currently, only Case 2 in Figure 7B (i.e., TRS and CSI-RS repetition) is permitted. The use of this case may depend on the gNB implementation. In general, Case 1 is expected to be more widely used than Case 2 because it requires less CSI-RS overhead.

[0078] Therefore, the present inventors have conceived a method for appropriately indicating at least one of the TCI state and QCL type when a non-serving cell is applied.

[0079] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0080] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0081] In the present disclosure, terms such as activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0082] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0083] 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.

[0084] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0085] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0086] In the present disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In the present disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0087] In the present disclosure, the terms panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable.

[0088] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and the TCI may be interchangeable with each other.

[0089] In the present disclosure, common beam, unified TCI state, beam applicable to DL and UL, beam applied to multiple channels, and PL-RS may be read interchangeably.

[0090] In the present disclosure, the terms CSI-RS, NZP-CSI-RS, periodic (P)-CSI-RS, P-TRS, semi-persistent (SP)-CSI-RS, aperiodic (A)-CSI-RS, TRS, CSI-RS having TRS information (upper layer parameter trs-Info), and NZP CSI-RS resource in an NZP CSI-RS resource set having TRS information may be interchangeable. In the present disclosure, the terms CSI-RS resource, CSI-RS resource set, CSI-RS resource group, and information element (IE) may be interchangeable.

[0091] In the present disclosure, a non-serving cell, a candidate serving cell, a cell with a PCI different from that of the current serving cell, and another serving cell with a PCI may be interchangeable terms. A PCI different from that of the serving cell and an additional PCI may also be interchangeable terms.

[0092] In the present disclosure, TRS, tracking CSI-RS, CSI-RS having TRS information (upper layer parameter trs-Info), and NZP-CSI-RS resource in an NZP-CSI-RS resource set having TRS information may be read as interchangeable.

[0093] The terms "TCI state," "TCI state or QCL assumption," "QCL assumption," "QCL information," "QCL parameters," "spatial domain receive filter," "UE spatial domain receive filter," "spatial domain filter," "UE receive beam," "DL receive beam," "DL precoding," "DL precoder," "DL-RS," and "RS of QCL type X of TCI state or QCL assumption" may be interchanged. The terms "RS of QCL type X," "DL-RS associated with QCL type X," "DL-RS having QCL type X," "source of DL-RS," "SSB," and "CSI-RS" may be interchanged. X may be, for example, A, B, C, or D.

[0094] In the present disclosure, the QCL source of N being M, N and M being in a QCL relationship, N and M being in a QCL type X relationship, and the TCI state of N indicating QCL type X with M may be interchangeable. X may be, for example, A, B, C, or D. N and M may be, for example, any of the DM-RS, CSI-RS, TRS, and SSB of the PDSCH / PDCCH. The DM-RS, CSI-RS, TRS, and SSB of the PDSCH / PDCCH may be interchangeable with the TCI state of the DM-RS, the TCI state of the CSI-RS, the TCI state of the TRS, and the TCI state of the SSB of the PDSCH / PDCCH. The SSB and the SS / PBCH block may be interchangeable.

[0095] B corresponding to A, B with A (B with A), and A with B (A with B) may be interchangeable. Type X and QCL type X may be interchangeable. X is, for example, any of A, B, C, and D. An SS / PBCH block having a PCI different from the PCI of the serving cell and an SS / PBCH block of a non-serving cell may be interchangeable.

[0096] (Wireless Communication Method) <First Embodiment> [Embodiment 1.1] Upon receiving an upper layer parameter trs-Info (an upper layer parameter indicating information on TRS), the UE may expect (assume) that the TCI state indicates one of the following QCL types (1-1) to (1-3) for a periodic CSI-RS resource (target RS) in the NZP-CSI-RS-ResourceSet configured together with the trs-Info.

[0097] (1-1) "type C" corresponding to an SS / PBCH block and, if applicable, "type D" corresponding to the same SS / PBCH block. (1-2) "type C" corresponding to an SS / PBCH block and, if applicable, "type D" corresponding to a CSI-RS in an NZP-CSI-RS-ResourceSet configured with the upper layer parameter repetition. (1-3) "type C" corresponding to an SS / PBCH block (source RS) and, if applicable, "type D" corresponding to the same SS / PBCH block. This reference RS (SS / PBCH block) may additionally be an SS / PBCH block with a PCI different from the PCI of the serving cell. The UE may assume that the center frequency, SCS, and SFN offset are the same for SS / PBCH blocks from the serving cell and for SS / PBCH blocks with a PCI different from the serving cell.

[0098] The QCL type (1-3) is not limited to the QCL type indicated by the TCI state for the periodic CSI-RS resource, but may be the QCL type indicated by the TCI state for other channels / RSs, etc.

[0099] The TCI state in this embodiment may be the TCI state of Rel. 15 / 16, or may be the unified TCI state (TCI state used for both UL channels and DL channels) considered in Rel. 17. When the unified TCI state considered in Rel. 17 is applied, the above (1-3) may be included (or not included), and when the TCI state of Rel. 15 / 16 is applied, the above (1-3) may be excluded (or not included).

[0100] In addition, if a TCI state related to a PCI different from the PCI of the serving cell is set, the above (1-3) may be included, and if the TCI state is not set, the above (1-3) may not be included.

[0101] The TCI state in this embodiment may be a TCI state set / indicated for the TRS, or may be a TCI state in which the TRS is set as a QCL source RS (e.g., a TCI state of a DMRS for a PDCCH / PDSCH).

[0102] 8 is a diagram illustrating an example of a QCL relationship of a TRS in aspect 1.1. The QCL relationship between the DM-RS of the PDSCH / PDCCH and the TRS may be, for example, QCL type A or D. The QCL relationship between the TRS and an SSB of a non-serving cell (a cell having a PCI different from the PCI of the serving cell) may be, for example, QCL type C or D.

[0103] [Embodiment 1.2] For the CSI-RS resources (target RSs) in the configured NZP-CSI-RS-ResourceSet, the UE expects the TCI status to indicate one of the following QCL types (2-1) to (2-5). The NZP-CSI-RS-ResourceSet does not have the upper layer parameter trs-Info and the upper layer parameter repetition. That is, the UE does not receive the upper layer parameter trs-Info and the upper layer parameter repetition.

[0104] (2-1) "type A" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and, if applicable, "type D" corresponding to the same CSI-RS resources. (2-2) "type A" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and, if applicable, "type D" corresponding to the SS / PBCH blocks. (2-3) "type A" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and, if applicable, "type D" corresponding to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter repetition. (2-4) If "typeD" is not applicable, "typeB" corresponds to the CSI-RS resources in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info. (2-5) "typeA" corresponds to the CSI-RS resources (another CSI-RS resources / source RS) in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and, if applicable, "typeD" corresponds to the SS / PBCH block (source RS). This reference RS (CSI-RS resource, SS / PBCH block) may additionally be an SS / PBCH block with a PCI different from that of the serving cell. The UE may assume that the center frequency, SCS, and SFN offset are the same for the SS / PBCH block from the serving cell and the SS / PBCH block with a PCI different from that of the serving cell.

[0105] The QCL type of (2-5) is not limited to the QCL type indicated by the TCI state for the periodic CSI-RS resource, but may be the QCL type indicated by the TCI state for other channels / RSs, etc.

[0106] The TCI state in this embodiment may be the TCI state of Rel. 15 / 16, or the unified TCI state being considered in Rel. 17. When the unified TCI state being considered in Rel. 17 is applied, the above (2-5) may be included (or not included), and when the TCI state of Rel. 15 / 16 is applied, the above (2-5) may be excluded (or not included).

[0107] In addition, if a TCI state related to a PCI different from the PCI of the serving cell is set, the above (2-5) may be included, and if the TCI state is not set, the above (2-5) may not be included.

[0108] The TCI state in this embodiment may be a TCI state set / indicated for the TRS, or may be a TCI state in which the TRS is set as a QCL source RS (e.g., a TCI state of a DMRS for a PDCCH / PDSCH).

[0109] Between multi-TRP cells, the DMRS of PDCCH / PDSCH may support any of the QCL source RS and QCL type of the following options 1 to 3. This embodiment corresponds to option 3.

[0110] <<Option 1>> A TRS is configured for the source RS of QCL type A, and a CSI-RS for beam management is configured for the source RS of QCL type D.

[0111] <<Option 2>> The TRS is configured for QCL Type A and QCL Type D source RSs.

[0112] <<Option 3>> The CSI-RS of the CSI is configured for the source RS of QCL type A and QCL type D.

[0113] 9 is a diagram illustrating an example of a QCL relationship of a CSI-RS in aspect 1.2. The QCL relationship between the DM-RS of the PDSCH / PDCCH and the CSI-RS may be, for example, QCL type A or D. The QCL relationship between the CSI-RS and the SSB of a non-serving cell (a cell having a PCI different from the PCI of the serving cell) may be, for example, QCL type A or D.

[0114] <Supplementary Note> At least one of the above-described embodiments may be applied only to UEs that have reported or support a specific UE capability.

[0115] The specific UE capabilities may indicate at least one of the following: Supporting specific processing / operations / control / information for at least one of the above embodiments; Supporting unified TCI states in Rel. 17; Supporting L1 / L2 inter-cell mobility; Supporting multi-TRP inter-cell mobility; Supporting the use of SSB of an additional PCI as a QCL source.

[0116] Furthermore, the specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., cell, band, BWP), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)).

[0117] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0118] Furthermore, at least one of the above-described embodiments may be applied when the UE is configured with specific information related to the above-described embodiments through higher layer signaling, for example, the specific information may correspond to the UE capabilities.

[0119] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, Rel. 15 / 16 behavior.

[0120] (Supplementary Note) The following inventions are supplementary notes regarding one embodiment of the present disclosure. [Supplementary Note 1] (Corresponding to (1-3) of Embodiment 1.1) A terminal comprising: a receiver that receives higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS); and a controller that expects, for a CSI-RS resource configured together with the information, a transmission configuration indication (TCI) state to indicate a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PSCH) block having a physical cell ID (PCI) different from the PCI of a serving cell. [Supplementary Note 2] (Corresponding to (1-3) of Embodiment 1.1) The terminal according to Supplementary Note 1, wherein the QCL types are QCL type C and QCL type D. [Supplementary Note 3] (Corresponding to (2-5) of Embodiment 1.2) The terminal according to Supplementary Note 1 or Supplementary Note 2, wherein, if the receiving unit does not receive the information, the control unit expects, for a CSI-RS resource, that the TCI state is QCL type A corresponding to another CSI-RS resource configured together with the information, and the CSI-RS resource has a PCI different from the PCI of a serving cell. [Supplementary Note 4] (Corresponding to (2-5) of Embodiment 1.2) The terminal according to any of Supplementary Notes 1 to 3, wherein, if the receiving unit does not receive the information, the control unit expects, for a CSI-RS resource, that the TCI state is QCL type D corresponding to an SS / PSCH block, and the SS / PSCH block has a PCI different from the PCI of a serving cell.

[0121] (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.

[0122] 10 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).

[0123] 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.

[0124] 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.

[0125] 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))).

[0126] 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.

[0127] 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).

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0133] 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).

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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).

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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).

[0147] 11 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] The transmitting / receiving unit 120 may transmit higher layer parameters indicating information of the tracking channel state information reference signal (CSI-RS) (TRS).

[0165] The control unit 110 may indicate, for the CSI-RS resource configured with the information, a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PSCH) block whose transmission configuration indication (TCI) state has a physical cell ID (PCI) different from the serving cell's PCI.

[0166] (User Terminal) Fig. 12 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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 and the transmitting / receiving antenna 230.

[0183] The transceiver 220 may receive higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS).

[0184] The controller 210 may expect that the transmission configuration indication (TCI) state for the CSI-RS resource configured with the information indicates a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PSCH) block having a physical cell ID (PCI) different from the serving cell's PCI. The QCL type may be QCL type C or QCL type D.

[0185] If the transceiver unit 220 does not receive the information, the control unit 210 expects the TCI state for the CSI-RS resource to be QCL type A corresponding to another CSI-RS resource configured with the information, and the CSI-RS resource may have a PCI different from the PCI of the serving cell.

[0186] If the transceiver unit 220 does not receive the information, the control unit 210 expects the TCI state for the CSI-RS resource to be QCL type D corresponding to the SS / PSCH block, and the SS / PSCH block may have a PCI different from the PCI of the serving cell.

[0187] (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.

[0188] 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.

[0189] For example, a base station, a user terminal, or the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 13 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, and the like.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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).

[0199] 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.

[0200] 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.

[0201] (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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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."

[0220] 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.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] 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.

[0225] 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.

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

[0227] 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).

[0228] 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).

[0229] 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).

[0230] 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.

[0231] 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.

[0232] 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).

[0233] 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.

[0234] 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.

[0235] 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.

[0236] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0237] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0238] 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.

[0239] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0240] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0241] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that 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.

[0242] 14 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0243] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0244] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0245] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0246] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0247] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0248] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0249] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0250] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0251] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0252] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0253] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0254] 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.

[0255] 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.

[0256] 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.

[0257] 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.

[0258] 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 (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 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0259] 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."

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] Furthermore, "judgment (decision)" may be read as "assuming," "expecting," "considering," or the like.

[0265] 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.

[0266] 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."

[0267] 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.

[0268] 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."

[0269] 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.

[0270] 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.

[0271] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0272] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0273] 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 receiver for receiving higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS); a control unit that expects a transmission configuration indication (TCI) state for a CSI-RS resource configured with the information to indicate a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PBCH) block having a physical cell ID (PCI) different from the PCI of a serving cell; and The control unit expects that the TCI state for the CSI-RS resource when the receiving unit does not receive the information is a QCL type for spatial reception parameters corresponding to an SS / PBCH block, and the SS / PBCH block to which the QCL type corresponds has a PCI different from the PCI of the serving cell.

2. receiving higher layer parameters indicative of tracking channel state information reference signal (CSI-RS) (TRS) information; Expecting that for the CSI-RS resource configured with the information, a transmission configuration indication (TCI) state indicates a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PBCH) block having a physical cell ID (PCI) different from the PCI of the serving cell; Expecting that for a CSI-RS resource when the information is not received, the TCI state is of QCL type for spatial reception parameters corresponding to an SS / PBCH block; and A wireless communication method for a terminal in which the SS / PBCH block corresponding to the QCL type has a PCI different from the PCI of the serving cell.

3. A transmitter that transmits higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS); A control unit that indicates, for a CSI-RS resource configured with the information, a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PBCH) block whose transmission configuration indication (TCI) state has a physical cell ID (PCI) different from the PCI of the serving cell; and The control unit instructs that the TCI state for a CSI-RS resource when the transmission unit does not transmit the information is a QCL type for spatial reception parameters corresponding to an SS / PBCH block, and the SS / PBCH block to which the QCL type corresponds has a PCI different from the PCI of the serving cell.

4. A system including a terminal and a base station, The terminal A receiver for receiving higher layer parameters indicating information of a tracking channel state information reference signal (CSI-RS) (TRS); a control unit that expects a transmission configuration indication (TCI) state for a CSI-RS resource configured with the information to indicate a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PBCH) block having a physical cell ID (PCI) different from the PCI of a serving cell; and The control unit expects that the TCI state for the CSI-RS resource when the receiving unit does not receive the information is a QCL type for spatial reception parameters corresponding to an SS / PBCH block, and the SS / PBCH block to which the QCL type corresponds has a PCI different from the PCI of a serving cell; The base station A system comprising a transmitter for transmitting the upper layer parameters indicative of the information.