Terminals, wireless communication methods, base stations and systems

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

Technical Field

[0001] This disclosure relates to a terminal, a wireless communication method in a next-generation mobile communication system 、 base station and system and is concerned with.

Background Art

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

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

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Summary of the Invention

[0005] Future wireless communication systems are expected to control communication based on inter-cell mobility, including cells with a different PCI (non-serving cell) from the physical cell ID (PCI) of the serving cell, or on inter-cell mobility using multiple transmit / receive points (e.g., Multi-TRP (MTRP)).

[0006] However, it remains unclear how to indicate at least one of the TCI status and QCL type when a non-serving cell is applied.

[0007] This disclosure is made in view of the foregoing and concerns a terminal and wireless communication method capable of appropriately indicating at least one of the TCI state and QCL type when a non-serving cell is applied. 、 base station and system One of the objectives is to provide it. [Means for solving the problem]

[0008] A terminal according to one aspect of this disclosure includes a receiving unit that receives upper-layer parameters indicating information of a Tracking Channel Status Reference Signal (CSI-RS) (TRS), and a synchronization signal / physical broadcast channel (SS / P) having a PCI that is different from the physical cell ID (PCI) of the serving cell for the CSI-RS resource set together with the said information. B A control unit that is expected to indicate the QCL type corresponding to the CH) block, and Furthermore, the control unit expects that, in the case where the receiving unit does not receive the information, the TCI state of the CSI-RS resource is a QCL type for the spatial receiving parameter corresponding to the SS / PBCH block, and the SS / PBCH block corresponding to the QCL type has a PCI different from the PCI of the serving cell. It is characterized by the following: [Effects of the Invention]

[0009] According to one aspect of this disclosure, at least one of the TCI state and QCL type is appropriately indicated when a non-serving cell is applied. [Brief explanation of the drawing]

[0010] [Figure 1] Figures 1A and 1B show an example of inter-cell mobility. [Figure 2] Figure 2 shows the TCI state corresponding to the CSI-RS associated with the SSB of a non-serving cell. [Figure 3] Figure 3 shows an example of the relationship between beam reporting and reconstruction index. [Figure 4] Figure 4 shows an example of an inter-cell scenario in a multi-DCI-based multi-TRP. [Figure 5] Figure 5A shows the maximum number of additional PCI slots for Case 1. Figure 5B shows the maximum number of additional PCI slots for Case 2. [Figure 6] Figure 6 shows an example where SSB from a serving cell, SSB from a cell with additional PCI, and UL transmission overlap. [Figure 7] Figure 7A shows the TCI state for Rel. 15 and the set DL / joint TCI state for Rel. 17. Figure 7B shows the indicated DL / joint TCI state. [Figure 8] Figure 8 shows an example of the QCL relationship of TRS in Embodiment 1.1. [Figure 9] Figure 9 shows an example of the QCL relationship of CSI-RS in Embodiment 1.2. [Figure 10] Figure 10 shows an example of a schematic configuration of a wireless communication system according to one embodiment. [Figure 11] Figure 11 shows an example of the configuration of a base station according to one embodiment. [Figure 12] Figure 12 shows an example of the configuration of a user terminal according to one embodiment. [Figure 13]FIG. 13 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. [Figure 14] FIG. 14 is a diagram showing an example of a vehicle according to an embodiment.

Embodiments for Carrying out the Invention

[0011] (TCI, Spatial Relationship, QCL) In NR, it is considered to control at least one of signal and channel (expressed as signal / channel) in a UE, such as reception processing (e.g., at least one of reception, demapping, demodulation, decoding), transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, encoding) based on the Transmission Configuration Indication state (TCI state).

[0012] The TCI state may represent what is applied to the downlink signal / channel. What corresponds to the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.

[0013] The TCI state is information regarding the Quasi-Co-Location (QCL) of a signal / channel, and may be called a spatial reception parameter, Spatial Relation Information, etc. The TCI state may be set for each UE for each channel or each signal.

[0014] QCL is an index that indicates the statistical properties of a signal / channel. For example, if two signals / channels have a QCL relationship, it may mean that we can assume that at least one of the following is identical between these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0015] The spatial reception parameters may correspond to the UE's received beam (e.g., the received analog beam), and the beam may be identified based on the spatial QCL. In this disclosure, QCL (or at least one element of QCL) may be interpreted as sQCL (spatial QCL).

[0016] QCL may have multiple types (QCL types). For example, there may be four QCL types A and D that differ in the parameters (or parameter sets) that can be assumed to be the same, and these parameters (which may also be called QCL parameters) are shown below: • 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 assumption by the UE that one control resource set (CORESET), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be called a QCL assumption.

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

[0019] The TCI state may, for example, be information regarding the QCL between the target channel (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 upper-layer signaling, physical layer signaling, or a combination thereof.

[0020] In this disclosure, the upper-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0021] MAC signaling may use, for example, MAC Control Elements (MAC CEs) or MAC Protocol Data Units (PDUs). Broadcast information may also include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), or Other System Information (OSIs).

[0022] Physical layer signaling may include, for example, Downlink Control Information (DCI).

[0023] The channel / signal to which the TCI status applies may also be called the target channel / reference signal (target channel / RS), or simply the target, while the other signal mentioned above may be called the reference signal (reference RS), source RS, or simply the reference.

[0024] The channel on which the TCI state or spatial relationship is set (specified) may be, for example, at least one of the following: Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), or Physical Uplink Control Channel (PUCCH).

[0025] Furthermore, the RS that has a QCL relationship with the channel may be at least one of the following: 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), or a Demodulation Reference Signal (DMRS)).

[0026] An SSB is a signal block that includes 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 called an SS / PBCH block.

[0027] The RS of a QCL type X in a TCI state may also mean the RS in the relationship between a channel / signal (or its DMRS) and a QCL type X, and this RS may also be called the QCL source of the QCL type X in that TCI state.

[0028] (CSI) In NR, the UE measures the channel state using a reference signal (or a resource for that reference signal) and feeds back (reports) the channel state information (CSI) to the network (e.g., the base station).

[0029] The UE may measure the channel state using at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), or Demodulation Reference Signal (DMRS).

[0030] A CSI-RS resource may include at least one of the following: 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 called Signal Measurement Resources (SMRs) or Channel Measurement Resources (CMRs). SMRs (CMRs) may include, for example, NZP CSI-RS resources for channel measurement, SSBs, etc.

[0032] Resources for measuring interference components for CSI may be called Interference Measurement Resources (IMRs). An IMR may include, for example, at least one of the following: 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 synchronization signals (e.g., a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS)) and a PBCH (and its corresponding DMRS), and may also be called an SS block (SSB).

[0034] Furthermore, CSI may include at least one of the following: Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Resource Indicator (SSBRI), Layer Indicator (LI), 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), and L1-SNR (Signal to Noise Ratio).

[0035] A CSI may have multiple parts. Part 1 of the CSI may contain relatively few bits of information (e.g., RI). Part 2 of the CSI may contain relatively many bits of information (e.g., CQI), such as information determined based on Part 1 of the CSI.

[0036] Furthermore, CSIs may be classified into several CSI types. The type of information reported, its size, etc., may differ depending on the CSI type. For example, a CSI type configured for single-beam communication (also called Type 1 CSI or single-beam CSI) and a CSI type configured for multi-beam communication (also called Type 2 CSI or multi-beam CSI) may be defined. The uses of CSI types are not limited to these.

[0037] Methods for providing feedback on CSIs include periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI, AP-CSI) reporting, and semi-persistent CSI (SP-CSI) reporting.

[0038] The UE may communicate CSI measurement configuration information using upper-layer signaling, physical layer signaling, or a combination thereof.

[0039] CSI measurement configuration information may be configured, for example, using the RRC information element "CSI-MeasConfig". CSI measurement configuration information may also include CSI resource configuration information (RRC information element "CSI-ResourceConfig"), CSI reporting configuration information (RRC information element "CSI-ReportConfig"), etc. CSI resource configuration information relates to resources for CSI measurement, and CSI reporting configuration information relates to how the UE performs CSI reporting.

[0040] This section describes the RRC information elements (or RRC parameters) related to CSI reporting settings and CSI resource settings.

[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.). This resource information corresponds to the ID (Identifier) ​​("CSI-ResourceConfigId") of the CSI resource configuration information.

[0042] The IDs of the CSI resource configuration information corresponding to each resource information (which may also be called CSI resource configuration IDs) may be the same for one or more of them, or they may each be different.

[0043] The CSI resource configuration information ("CSI-ResourceConfig") may include the CSI resource configuration information ID, CSI-RS resource set list information ("csi-RS-ResourceSetList"), resource type ("resourceType"), etc. The CSI-RS resource set list may include at least one of the following: 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 represents 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, and P-CSI-RS, respectively.

[0045] Furthermore, channel measurement resources may be used to calculate, for example, CQI, PMI, and L1-RSRP. Interference measurement resources may also be used to calculate L1-SINR, L1-SNR, L1-RSRQ, and other interference-related indices.

[0046] (Inter-cell mobility) In NR, it is being considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) will perform DL transmissions to the UE. It is also being considered that the UE will perform UL transmissions to one or more TRPs.

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

[0048] Figure 1A shows an example of inter-cell mobility including a non-serving cell (e.g., Single-TRP inter-cell mobility). The UE may configure 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 from the base station / TRP of cell #3, which is not the serving cell (it becomes a non-serving cell). This corresponds, for example, to the UE switching 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. The selection of the port (e.g., antenna port) / TRP may be performed based on the TCI status indicated or updated by DCI / MAC CE. Here, we show a case where different Physical Cell Identifier (PCI) settings are supported for cell #1 and cell #3.

[0050] Figure 1B shows an example of a multi-TRP scenario (e.g., multi-TRP inter-cell mobility). The UE may have multiple (e.g., two) TRPs (or different CORESET pool indices) configured in each cell. Here, the UE receives channels / signals from TRP#1 and TRP2. Furthermore, TRP#1 corresponds to physical cell ID (PCI)#1 and TRP#2 corresponds to PCI#2.

[0051] Multiple TRPs (TRP#1, #2) may be connected by an ideal / non-ideal backhaul, and information, data, etc., may be exchanged. Each TRP in a multi-TRP may transmit the same or different codewords (CW) and the same or different layers. As one form of multi-TRP transmission, Non-Coherent Joint Transmission (NCJT) may be used, as shown in Figure 1B. Here, we show the case where NCJT is performed between TRPs corresponding to different PCIs. Note that the same serving cell settings may be applied / configured for TRP#1 and TRP#2.

[0052] Multiple PDSCHs (Multi-PDSCHs) that are NCJTed may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, a first PDSCH from TRP#1 and a second PDSCH from TRP#2 may overlap in at least one of the time and frequency resources. The first and second PDSCHs may be used for transmitting the same TB or for transmitting different TBs.

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

[0054] Multiple PDSCHs from a multi-TRP (which may also be called multiple PDSCHs) may be scheduled using a single DCI (single DCI (S-DCI), single PDCCH) (single master mode). A single DCI may be transmitted from one TRP in the multi-TRP. A configuration using a single DCI in a multi-TRP may be called a single-DCI-based multi-TRP (mTRP / MTRP).

[0055] Multiple PDSCHs from a multi-TRP may be scheduled using multiple DCIs (multi-DCI (M-DCI), multi-PDCCH (multiple PDCCH)) (multi-master mode). Multiple DCIs may be transmitted from each of the multi-TRPs. A configuration that utilizes multiple DCIs in a multi-TRP may be called a multi-DCI-based multi-TRP (mTRP / MTRP).

[0056] A UE may assume that it sends separate CSI reports (CSI reports) for different TRPs, each for each TRP. Such CSI feedback may be called separate feedback, separate CSI feedback, etc. In this disclosure, “separate” may be interpreted as “independent.”

[0057] From Rel.17 NR onward, MAC CE / DCI is expected to support beam instruction to TCI states associated with different PCIs. Furthermore, from Rel.18 NR onward, MAC CE / DCI is expected to support instruction to change serving cells to cells with different PCIs.

[0058] Through the inter-cell mobility described above (e.g., L1 / L2 inter-cell mobility), a UE can send and receive UL / DL channel / RS to and from cells with a PCI different from that of the serving cell. For example, if the RSRP of a non-serving cell is greater than that of the serving cell, the UE can send and receive UL / DL channel / RS to and from the non-serving cell without handover.

[0059] Figure 2 shows the TCI states corresponding to CSI-RS associated with SSB in non-serving cells. PCI#1 and #3 in Figure 2 correspond to PCI#1 and #3 in Figures 1A and 1B. When inter-cell mobility as shown in Figure 1A is performed, the UE switches the TCI state used for receiving DL from TCI state#1 to TCI state#2.

[0060] <Beam Report and Reconstructed Index> Figure 3 shows an example of the relationship between beam reporting and the reconstruction index. As shown in Figure 3, the beam reporting (CSI reporting) for a non-serving cell includes the RSRP value and the CRI or SSBRI. The CRI or SSBRI is related to the reconstruction index (ID for PCI).

[0061] A recreated index is a newly created index based on PCI, and is associated with at least a portion of PCI. The recreated index is set by the RRC for the UE and may be assigned a number up to 7 corresponding to additional (non-serving cell) PCI. A recreated index (ID) of 0 may represent a serving cell (serving cell PCI). Because the recreated index can be represented with fewer bits than PCI, communication overhead can be reduced.

[0062] <Multi-TRP cell inter-scenarios> This section describes inter-cell scenarios (inter-cell mobility) in multi-DCI based multi-TRP. When multi-TRP is applied, a coresetPoolIndex is set. As shown in Figure 4, additional PCIs are associated with activated TCI states (SSB as QCL source RS) corresponding to PDSCH / PDCCH. One PCI is associated with an activated TCI state corresponding to one coresetPoolIndex.

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

[0064] The serving cell and the cell with additional PCIs may have the same center frequency, subcarrier spacing (SCS), and system frame number (SFN) offset. The RRC may configure up to seven additional PCIs. Furthermore, the UE may report its UE capability indicating the maximum number of additional PCIs, X.

[0065] Regarding X for the maximum number of additional PCI slots set as UE capabilities, the following two cases are possible. Note that Case 1 and Case 2 do not need to be enabled simultaneously. [Case 1] X represents the maximum number of additional PCIs whose corresponding "SSB time domain position and period" is the same as that of the serving cell (let's call this X X1). [Case 2] X represents the maximum number of additional PCIs in which part or all of the corresponding "SSB time domain position and period" is different from the serving cell (let's call this X2).

[0066] Figure 5A shows the maximum number of additional PCI slots for Case 1. In Figure 5A, X1 is 4. Figure 5B shows the maximum number of additional PCI slots for Case 2. In Figure 5B, X2 is 8.

[0067] Figure 6 shows an example where an SSB from a serving cell, an SSB from a cell with an additional PCI, and a UL transmission overlap. The UE may cancel a UL transmission if it overlaps in time with an SSB from a 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 PDCCH / PDSCH DMRS, the configured DL / joint TCI state is identified as "DL or Joint TCI State" excluding the indicated "DL or Joint TCI State". The indicated TCI state applies to multiple UL / DL channels / RSs. The configured TCI state applies only to channels / RSs.

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

[0070] (Antenna port quasi co-location (QCL)) In the section on antenna port QCL in Rel.17, the Tracking Reference Signal (TRS) is specified 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 NZP-CSI-RS-ResourceSet configured with the upper layer parameter trs-Info, the UE expects the TCI state to indicate one of the following QCL types: (1) or (2). (1) "type C" corresponding to the SS / PBCH block, and, where applicable, "type D" corresponding to the same SS / PBCH block. (2) "type C" of the SS / PBCH block, and, if applicable, "type D" corresponding to the CSI-RS in the NZP-CSI-RS-ResourceSet, set together with the upper layer parameter repetition.

[0072] In Rel.17, the following is being considered for the CSI-RS that supports repeated transmissions in the antenna port QCL:

[0073] For CSI-RS resources within an NZP-CSI-RS-ResourceSet configured with the upper layer parameter repetition, the UE expects the TCI state to be one of the following QCL types (1) to (3): (1) "typeA" corresponding to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and, if applicable, "typeD" corresponding to the same CSI-RS resource. (2) "typeA" corresponds to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and "typeD" corresponds to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter repetition. (3) A "type C" corresponding to an SS / PBCH block, and, where applicable, a "type D" corresponding to the same SS / PBCH block. This reference RS may additionally be an SS / PBCH block having 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 having a PCI different from that of the serving cell.

[0074] (NZP CSI-RS) In the section of Rel.17 for NZP CSI-RS, it is being considered that the following provision should be made: This section does not prohibit CSI-RS (including TRS) from being associated with SSBs that have additional PCI.

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

[0076] (analysis) As described above, future wireless communication systems are expected to control communication based on inter-cell mobility that includes cells with a PCI different from the physical cell ID (PCI) of the serving cell (non-serving cells), or inter-cell mobility that utilizes multiple transmit / receive points. However, it is unclear how at least one of the TCI state and QCL type can be indicated when non-serving cells are applied. For example, it is unclear whether the TCI state of TRS / CSI-RS can indicate the QCL type corresponding to a reference signal with a PCI different from the physical cell ID (PCI) of the serving cell (corresponding to a non-serving cell).

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

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

[0079] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0080] In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0081] In this disclosure, terms such as activate, deactivate, indicate, select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and operable may be interpreted interchangeably.

[0082] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0083] In this disclosure, the upper-layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.

[0084] In this disclosure, MAC signaling may include, for example, MAC Control Elements (MAC CEs) and MAC Protocol Data Units (PDUs). Broadcast information may include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), and Other System Information (OSIs).

[0085] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0086] In this disclosure, terms such as index, identifier (ID), indicator, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interpreted interchangeably.

[0087] In this disclosure, the terms used include: panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmit entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relationship, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups, resources (e.g., reference signal resources, SRS resources), resource sets (e.g., reference signal resource sets), CORESET pools, 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 assumptions, etc., may be interpreted interchangeably.

[0088] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information" may be interpreted as mutually exclusive as "a set of spatial relationship information," "one or more spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive.

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

[0090] In this disclosure, 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 resources in an NZP CSI-RS resource set having TRS information may be interpreted as one another. In this disclosure, CSI-RS resources, CSI-RS resource sets, CSI-RS resource groups, and information elements (IEs) may be interpreted as one another.

[0091] In this disclosure, the terms non-serving cell, candidate serving cell, cell with a different PCI than the current serving cell, and another serving cell with a different PCI may be used interchangeably with each other. The terms PCI different from the serving cell and additional PCI may be used interchangeably with each other.

[0092] In this disclosure, TRS, tracking CSI-RS, CSI-RS having TRS information (upper layer parameter trs-Info), and NZP-CSI-RS resource in the NZP-CSI-RS resource set having TRS information may be interpreted as mutually exclusive.

[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 in the TCI state or QCL assumption may be interpreted as mutually exclusive. The terms RS of QCL type X, DL-RS associated with QCL type X, DL-RS having QCL type X, DL-RS source, SSB, and CSI-RS may be interpreted as mutually exclusive. X is, for example, one of A, B, C, or D.

[0094] In this disclosure, the statements that N's QCL source is M, that N and M are in a QCL relationship, that N and M are in a QCL type X relationship, and that N's TCI state indicates a QCL type X with M are 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, or SSB of the PDSCH / PDCCH. The DM-RS, CSI-RS, TRS, and SSB of the PDSCH / PDCCH may be interpreted as the TCI state of the DM-RS, CSI-RS, TRS, or SSB of the PDSCH / PDCCH. The SSB and SS / PBCH blocks may be interpreted as interchangeable.

[0095] A corresponding to B, B having A (B with A), and A having B (A with B) may be interpreted as mutually exclusive. Type X and QCL type X may be interpreted as mutually exclusive. X is, for example, one of A, B, C, or D. SS / PBCH blocks having a PCI different from that of a serving cell and SS / PBCH blocks of a non-serving cell may be interpreted as mutually exclusive.

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

[0097] (1-1) "Type C" corresponding to the SS / PBCH block, and, where applicable, "Type D" corresponding to the same SS / PBCH block. (1-2) "typeC" corresponding to the SS / PBCH block, and, if applicable, "typeD" corresponding to the CSI-RS in the NZP-CSI-RS-ResourceSet, set together with the upper layer parameter repetition. (1-3) "Type C" corresponding to the SS / PBCH block (source RS), and, where applicable, "Type D" corresponding to the same SS / PBCH block. This reference RS (SS / PBCH block) may also be an SS / PBCH block having 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 having a PCI different from that of the serving cell.

[0098] The QCL types in (1-3) are not limited to the QCL types indicated by the TCI status for the above-mentioned periodic CSI-RS resources, but may also be QCL types indicated by the TCI status for other channels / RS, etc.

[0099] The TCI state in this embodiment may be the TCI state of Rel.15 / 16, or the unified TCI state (TCI state used for both UL 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 included).

[0100] Furthermore, if a TCI state related to a PCI different from the serving cell's PCI is set, the above (1-3) may be included, but if such a TCI state is not set, the above (1-3) may be excluded.

[0101] In this embodiment, the TCI state may be a TCI state set / instructed to the TRS, or a TCI state in which the TRS is set as the QCL source RS (for example, the TCI state of the DMRS for PDCCH / PDSCH).

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

[0103] [Embodiment 1.2] For a CSI-RS resource (target RS) within a configured NZP-CSI-RS-ResourceSet, the UE expects the TCI state to be 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. In other words, the UE does not receive the upper layer parameter trs-Info and the upper layer parameter repetition.

[0104] (2-1) "typeA" corresponding to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and, if applicable, "typeD" corresponding to the same CSI-RS resource. (2-2) "typeA" corresponding to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and "typeD" corresponding to the SS / PBCH block, if applicable. (2-3) "typeA" corresponding to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and, if applicable, "typeD" corresponding to the CSI-RS resource in NZP-CSI-RS-ResourceSet set together with the upper layer parameter repetition. (2-4) If "typeD" is not applicable, "typeB" is used, which corresponds to the CSI-RS resource in NZP-CSI-RS-ResourceSet, which is set together with the higher layer parameter trs-Info. (2-5) A "typeA" corresponding to a CSI-RS resource (another CSI-RS resource / source RS) in the NZP-CSI-RS-ResourceSet set together with the upper layer parameter trs-Info, and, where applicable, a "typeD" corresponding to an SS / PBCH block (source RS). This reference RS (CSI-RS resource, SS / PBCH block) may also be an SS / PBCH block having a different PCI than 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 having a different PCI than the serving cell.

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

[0106] The TCI state in this embodiment may be the TCI state of Rel.15 / 16, or the unified TCI state considered in Rel.17. When the unified TCI state 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 included).

[0107] Furthermore, if a TCI state related to a PCI different from the serving cell's PCI is set, the above (2-5) may be included, but if such a TCI state is not set, the above (2-5) may be excluded.

[0108] In this embodiment, the TCI state may be a TCI state set / instructed to the TRS, or a TCI state in which the TRS is set as the QCL source RS (for example, the TCI state of the DMRS for PDCCH / PDSCH).

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

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

[0111] 《Option 2》 TRS is configured for source RS of QCL type A and QCL type D.

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

[0113] Figure 9 shows an example of a QCL relationship between a CSI-RS and a PDSCH / PDCCH. The QCL relationship between the DM-RS of a 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 with a PCI different from that of a serving cell) may be, for example, QCL type A or D.

[0114] <Supplement> At least one of the embodiments described above may apply only to a UE that has reported or supports a particular UE capability.

[0115] The specific UE capability may represent at least one of the following: • To support specific processing / operation / control / information for at least one of the above embodiments. • Support the unified TCI state in Rel.17. • To support inter-L1 / L2 cell mobility. • To support multi-TRP inter-cell mobility. • Support for using additional PCI SSBs as QCL sources.

[0116] Furthermore, the specific UE capabilities described above may be capabilities that apply across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., cell, band, BWP), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities per subcarrier spacing (SCS).

[0117] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

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

[0119] If the UE does not support at least one of the above-mentioned specific UE capabilities or does not have the above-mentioned specific information configured, the behavior of, for example, Rel.15 / 16 may be applied.

[0120] (Note) The following invention is added with respect to one embodiment of this disclosure. [Note 1] (Corresponding to (1-3) of Embodiment 1.1) A receiving unit that receives upper-layer parameters indicating information of the Tracking Channel Status Reference Signal (CSI-RS) (TRS), A terminal having a control unit that expects the Transmit Configuration Instruction (TCI) state of a CSI-RS resource configured with the aforementioned information to indicate a QCL type corresponding to a synchronous signal / physical broadcast channel (SS / PSCH) block having a PCI different from the physical cell ID (PCI) of the serving cell. [Note 2] (Corresponding to (1-3) of Embodiment 1.1) The aforementioned QCL types are QCL type C and QCL type D. The terminals listed in Appendix 1. [Note 3] (Corresponding to (2-5) of Embodiment 1.2) If the receiving unit does not receive the information, the control unit expects that the TCI state of the CSI-RS resource is QCL type A corresponding to another CSI-RS resource set together with the information, and that the CSI-RS resource has a PCI different from the PCI of the serving cell. The terminals listed in Appendix 1 or Appendix 2. [Note 4] (Corresponding to (2-5) of Embodiment 1.2) If the receiving unit does not receive the information, the control unit expects that the TCI state for the CSI-RS resource is QCL type D corresponding to the SS / PSCH block, and that the SS / PSCH block has a PCI different from the PCI of the serving cell. The terminals listed in any of the appendices 1 through 3.

[0121] (Wireless communication system) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any or a combination thereof of the wireless communication methods according to the above embodiments of this disclosure.

[0122] Figure 10 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0123] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and so on.

[0124] In EN-DC, the LTE (E-UTRA) base station (eNB) is the Master Node (MN), and the NR base station (gNB) is the Secondary Node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0125] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0126] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[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 (CC) and Dual Connectivity (DC).

[0128] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may fall in a frequency band higher than FR2.

[0129] Furthermore, the user terminal 20 may communicate using at least one of the following methods at each CC: Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0130] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, if NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0131] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0132] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0133] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0134] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0135] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, shared by each user terminal 20.

[0136] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0137] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0138] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0139] Furthermore, the DCI that schedules PDSCH may be called a DL assignment or DL ​​DCI, and the DCI that schedules PUSCH may be called a UL grant or UL DCI. Furthermore, PDSCH may be interpreted as DL data, and PUSCH may be interpreted as UL data.

[0140] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with a particular search space based on the search space configuration.

[0141] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0142] PUCCH may transmit uplink control information (UCI) which includes at least one of the following: channel state information (CSI), delivery acknowledgment (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0143] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted when describing various channels.

[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 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 SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. SS, SSB, etc., may also be called reference signals.

[0146] Furthermore, in the wireless communication system 1, the Uplink Reference Signal (UL-RS) may transmit the Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), etc. The DMRS may also be called the User-Specific Reference Signal (UE-specific Reference Signal).

[0147] (base station) Figure 11 shows an example of the configuration of a base station according to one 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 one or more of the control unit 110, transceiver unit 120, transceiver antenna 130, and transmission line interface 140 may be provided.

[0148] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0149] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0150] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of radio resources, etc.

[0151] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0152] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0153] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0154] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0155] The transmitting / receiving unit 120 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0156] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., to generate a bit sequence to be transmitted.

[0157] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0158] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0159] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0160] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing to the acquired baseband signal, such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0161] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0162] The transmission path interface 140 may send and receive signals (backhaul signaling) with 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] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

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

[0165] The control unit 110 may also instruct a QCL type for a CSI-RS resource set with the aforementioned information, where the transmission setting instruction (TCI) state corresponds to a synchronous signal / physical broadcast channel (SS / PSCH) block having a PCI that is different from the physical cell ID (PCI) of the serving cell.

[0166] (User terminal) Figure 12 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0167] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0168] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0169] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0170] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0171] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0172] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0173] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0174] The transmitting / receiving unit 220 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0175] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210, etc., to generate a bit sequence to be transmitted.

[0176] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0177] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0178] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0179] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0180] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0181] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0182] In this disclosure, the transmitting and receiving units of the user terminal 20 may consist of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0183] The transmitting / receiving unit 220 may also receive higher-layer parameters indicating information from the Tracking Channel Status Reference Signal (CSI-RS) (TRS).

[0184] The control unit 210 may expect that, with respect to the CSI-RS resource set with the information, the Transmit Setting Instruction (TCI) status indicates a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PSCH) block having a PCI different from the physical cell ID (PCI) of the serving cell. The QCL type may be QCL type C or QCL type D.

[0185] If the transmitting / receiving unit 220 does not receive the information, the control unit 210 expects that the TCI state of the CSI-RS resource is QCL type A corresponding to another CSI-RS resource set together with the information, and the CSI-RS resource may have a PCI different from that of the serving cell.

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

[0187] (Hardware configuration) The block diagrams used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0188] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0189] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 13 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0190] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured to omit some of the devices.

[0191] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, processing may be performed by one processor, or by two or more processors simultaneously, sequentially, or by other means. Note that processor 1001 may be implemented using one or more chips.

[0192] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or to control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0193] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0194] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0195] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be called a register, cache, or main memory. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of this disclosure.

[0196] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital multipurpose disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be called an auxiliary storage device.

[0197] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated implementations of a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0198] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0199] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[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), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0201] (modified version) In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0202] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0203] Here, the neuralelogy may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neuralelogy may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, or specific windowing processes performed by the transceiver in the time domain.

[0204] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0205] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0206] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0207] For example, one subframe may be called TTI, multiple consecutive subframes may be called TTI, or one slot or one mini-slot may be called TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Note that the unit representing TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0208] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0209] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0210] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0211] A TTI with a time length of 1 ms may also be called a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, or a slot. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, or a slot.

[0212] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0213] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0214] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0215] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0216] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0217] A Bandwidth Part (BWP) (also called a partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a BWP.

[0218] A BWP may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured within a single carrier for a UE.

[0219] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0220] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative examples. For instance, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots within a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0221] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0222] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements that use these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0223] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0224] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0225] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

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

[0227] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Element (CE).

[0228] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not providing notification of the specified information or by providing notification of other information).

[0229] The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0230] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0231] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0232] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0233] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "quasi-co-location (QCL)," "transmission configuration indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," and "panel" may be used interchangeably.

[0234] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0235] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0236] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

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

[0238] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[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. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0240] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0241] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

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

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

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

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

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

[0247] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

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

[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 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[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 external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

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

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

[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, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0254] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel and downlink channel may be interpreted as sidelink channel.

[0255] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0256] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes with base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0257] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order and are not limited to that specific order.

[0258] Each aspect / embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (where x is, for example, an integer or decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), and IEEE This may apply to systems utilizing 802.20, Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, as well as next-generation systems that are extended, modified, created, or defined based on these. It may also apply to combinations of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0259] As used in this disclosure, the recitation "based on" does not mean "based solely on" unless otherwise specified. In other words, the recitation "based on" means both "based solely on" and "based at least in part on".

[0260] Any reference to an element using terms such as "first", "second", etc. used in this disclosure does not generally limit the amount or order of those elements. These terms can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and a second element does not mean that only two elements can be employed or that the first element must precede the second element in any way.

[0261] The term "determining" as used in this disclosure may encompass a variety of operations. For example, "determining" may be considered to be "judging", "calculating", "computing", "processing", "deriving", "investigating", "looking up (e.g., searching in a table, database or another data structure)", "ascertaining", etc.

[0262] Also, "determining" may be considered to be "receiving" (e.g., receiving information), "transmitting" (e.g., transmitting information), "input", "output", "accessing" (e.g., accessing data in a memory), etc.

[0263] Also, "judgment (decision)" may be regarded as "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "judgment (decision)" may be regarded as "judging" some action.

[0264] Also, "judgment (decision)" may be reinterpreted as "assuming", "expecting", "considering", etc.

[0265] The "maximum transmit power" described in the present disclosure may mean the maximum value of the transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0266] As used in this disclosure, the terms "connected" and "coupled", or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can 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 of these. For example, "connected" may be reinterpreted as "accessed".

[0267] In this disclosure, when two elements are connected, it can be considered that they are "connected" or "coupled" to each other using one or more wires, cables, printed electrical connections, etc., and also, as some non-limiting and non-exhaustive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, optical (both visible and invisible) region, etc.

[0268] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0269] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0270] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0271] In this disclosure, terms such as "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. Furthermore, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably with "i-th highest").

[0272] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0273] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The invention described herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined in the claims. Therefore, the descriptions herein are for illustrative purposes only and do not imply any limitation on the invention described herein.

Claims

1. A receiving unit that receives upper-layer parameters indicating information of the Tracking Channel Status Reference Signal (CSI-RS) (TRS), With respect to the CSI-RS resource set together with the aforementioned information, the control unit expects that the Transmit Configuration Instruction (TCI) state indicates a QCL type corresponding to a synchronous signal / physical broadcast channel (SS / PBCH) block having a PCI different from the physical cell ID (PCI) of the serving cell, It has, The control unit expects that, in the case where the receiving unit does not receive the information, the TCI state of the CSI-RS resource is a QCL type for spatial reception parameters corresponding to an SS / PBCH block, and the SS / PBCH block corresponding to the QCL type is a terminal having a PCI different from that of the serving cell.

2. A step of receiving upper-layer parameters that indicate information of the Tracking Channel Status Reference Signal (CSI-RS) (TRS), With respect to the CSI-RS resource set together with the aforementioned information, the step of expecting the Transmit Configuration Instruction (TCI) state to indicate a QCL type corresponding to a synchronous signal / physical broadcast channel (SS / PBCH) block having a PCI different from the physical cell ID (PCI) of the serving cell, Regarding the CSI-RS resource in the case where the aforementioned information is not received, the process of expecting the TCI state to be of the QCL type for the spatial reception parameter corresponding to the SS / PBCH block, It has, The SS / PBCH block corresponding to the QCL type is a wireless communication method for a terminal having a PCI different from that of a serving cell.

3. A transmitting unit that transmits higher-layer parameters indicating information for the Tracking Channel Status Information Reference Signal (CSI-RS) (TRS), With respect to the CSI-RS resource set together with the aforementioned information, the control unit indicates a QCL type corresponding to a synchronization signal / physical broadcast channel (SS / PBCH) block having a PCI different from the physical cell ID (PCI) of the serving cell, It has, The control unit indicates that, in the case where the transmitting unit does not transmit the information, the TCI state of the CSI-RS resource is a QCL type for spatial reception parameters corresponding to an SS / PBCH block, and the SS / PBCH block corresponding to the QCL type is a base station having a PCI different from that of a serving cell.

4. A system including a terminal and a base station, The aforementioned terminal is A receiving unit that receives upper-layer parameters indicating information of the Tracking Channel Status Reference Signal (CSI-RS) (TRS), With respect to the CSI-RS resource set together with the aforementioned information, the control unit expects that the Transmit Configuration Instruction (TCI) state indicates a QCL type corresponding to a synchronous signal / physical broadcast channel (SS / PBCH) block having a PCI different from the physical cell ID (PCI) of the serving cell, It has, The control unit expects that, in the case where the receiving unit does not receive the information, the TCI state of the CSI-RS resource is a QCL type for the spatial reception parameter corresponding to the SS / PBCH block, and the SS / PBCH block corresponding to the QCL type has a PCI different from the PCI of the serving cell. The aforementioned base station is A system having a transmission unit that transmits the higher-level parameters indicating the aforementioned information.

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