Terminal, wireless communication method, and base station

Abstract

A terminal according to an aspect of the present disclosure is characterized by comprising: a reception unit that receives a first Medium Access Control Control Element (MAC CE) including information to be used for at least one of the activation of non-serving cells and the nonactivation thereof and a second MAC CE including information indicating at least one of active ones of the non-serving cells indicated in the first MAC CE; and a control unit that controls the transmission / reception to / from the non-serving cell(s) indicated in the second MAC CE. According to an aspect of the present disclosure, the activation / nonactivation of non-serving cells can be appropriately performed.

Description

Technical Field

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

Background Art

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

[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

Problems to be Solved by the Invention

[0005] In future wireless communication systems, layer 1 / layer 2 (L1 / L2) inter-cell mobility that facilitates more efficient DL / UL beam management (achieving lower latency and overhead) is being considered.

[0006] In L1 / L2 inter-cell mobility, it is possible to change the serving cell using functions such as beam control without reconfiguring Radio Resource Control (RRC). In other words, it is possible to transmit and receive with a non-serving cell without handover. Since a data communication unavailable period occurs, such as the need for RRC reconnection for handover, L1 / L2 inter-cell mobility without handover is preferable.

[0007] However, in the case where at least one of inter-cell mobility including a non-serving cell and a multi-TRP scenario is applied, it is not clear how to instruct the activation / deactivation of the non-serving cell. If the activation / deactivation of the non-serving cell is not properly instructed, there is a risk of throughput degradation or communication quality deterioration.

[0008] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform the activation / deactivation of a non-serving cell.

Means for Solving the Problems

[0009] A terminal according to one aspect of the present disclosure includes a first Medium Access Control Control Element (MAC CE) containing information used for at least one of activation and deactivation of a non-serving cell, and a second MAC CE containing information indicating at least one of the active non-serving cells indicated in the first MAC CE, and a receiving unit that receives the second MAC CE, and a control unit that controls transmission and reception with the non-serving cell indicated in the second MAC CE.

Advantages of the Invention

[0010] According to one aspect of the present disclosure, activation / deactivation of a non-serving cell can be appropriately performed.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiment for Carrying Out the Invention

[0012] (CSI Report) In NR, the UE measures the channel state using a predetermined reference signal (or the resource for the reference signal), and feeds back (reports) the channel state information (Channel State Information: CSI) to the base station.

[0013] The UE may measure the channel state using a channel state information-reference signal (Channel State Information-Reference Signal: CSI-RS), a synchronization signal / physical broadcast channel (Synchronization Signal / Physical Broadcast Channel: SS / PBCH) block, a synchronization signal (Synchronization Signal: SS), a demodulation reference signal (DeModulation Reference Signal: DMRS), etc.

[0014] The CSI-RS resource may include at least one of Non Zero Power (NZP) CSI-RS and CSI-Interference Management (IM). The SS / PBCH block is a block that includes synchronization signals (e.g., Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS)) and PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB) or the like. An SSB index may be given for the time position of the SSB within a half-frame.

[0015] Note that CSI may include at least one of Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Layer 1 (L1)-Reference Signal Received Power (RSRP) (received reference signal power in layer 1), L1-Reference Signal Received Quality (RSRQ), L1-Signal to Interference plus Noise Ratio (SINR), L1-Signal to Noise Ratio (SNR), etc.

[0016] CSI may have multiple parts. The first part of CSI (CSI part 1) may include information with relatively few bits (e.g., RI). The second part of CSI (CSI part 2) may include information with relatively many bits (e.g., CQI), such as information determined based on CSI part 1.

[0017] As CSI feedback methods, (1) Periodic CSI (P-CSI) reporting, (2) Aperiodic CSI (A(AP)-CSI) reporting, (3) Semi-Persistent CSI (SP-CSI) reporting, etc. are being considered.

[0018] The UE may be notified of information regarding CSI reporting (which may also be referred to as CSI reporting configuration information) using upper layer signaling, physical layer signaling (e.g., Downlink Control Information (DCI)), or a combination thereof. The CSI reporting configuration information may be set, for example, using the RRC information element "CSI-ReportConfig".

[0019] Here, the upper layer signaling may be, for example, any of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0020] MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (MAC PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0021] The CSI report configuration information may include information regarding, for example, a reporting period, an offset, etc., and these may be expressed in a predetermined time unit (such as a slot unit, a subframe unit, a symbol unit, etc.). The CSI report configuration information may include a configuration ID (CSI-ReportConfigId). Parameters such as the type of CSI reporting method (such as whether it is SP-CSI or not) and the reporting period may be specified by the said configuration ID. The CSI report configuration information may include information (CSI-ResourceConfigId) indicating which signal (or resources for which signal) is used to report the measured CSI.

[0022] (Beam Management) So far in Rel-15 NR, methods for beam management (BM) have been studied. In the said beam management, it has been studied to perform beam selection based on the L1-RSRP reported by the UE. Changing (switching) the beam of a certain signal / channel may correspond to changing the (Transmission Configuration Indication state) of the said signal / channel.

[0023] Note that the beam selected by beam selection may be a transmission beam (Tx beam) or a reception beam (Rx beam). Also, the beam selected by beam selection may be a beam of the UE or a beam of the base station.

[0024] The UE may report (transmit) the measurement results for beam management using PUCCH or PUSCH. The said measurement results may be CSI including at least one of, for example, L1-RSRP, L1-RSRQ, L1-SINR, L1-SNR, etc. Also, the said measurement results may be called beam measurement, beam measurement results, beam report, beam measurement report, etc.

[0025] CSI measurements for beam reporting may include interference measurements. The UE may measure channel quality, interference, etc. using resources for CSI measurement, and derive beam reports. The resources for CSI measurement may be at least one of, for example, the resources of the SS / PBCH block, the resources of CSI-RS, and other reference signal resources. The configuration information of the CSI measurement report may be configured for the UE using upper layer signaling.

[0026] The beam report may include at least one of the results of channel quality measurement and interference measurement. The result of the channel quality measurement may include, for example, L1-RSRP. The result of the interference measurement may include L1-SINR, L1-SNR, L1-RSRQ, and other interference-related indicators (for example, any indicator other than L1-RSRP).

[0027] Note that the resources for CSI measurement for beam management may also be referred to as beam measurement resources. Also, the signal / channel to be measured by the CSI may also be referred to as the beam measurement signal. Also, the CSI measurement / report may be read as at least one of the measurement / report for beam management, the beam measurement / report, the radio link quality measurement / report, etc.

[0028] Regarding the CSI report configuration information considering the current NR beam management, it is included in the RRC information element "CSI-ReportConfig". The information in the RRC information element "CSI-ReportConfig" will be described.

[0029] The CSI report configuration information (CSI-ReportConfig) may include report quantity information (which may be represented by the "report quantity", the RRC parameter "reportQuantity"), which is information on the parameters to be reported. The report quantity information is defined in the type of the ASN.1 object called "choice". Therefore, one of the parameters defined as the report quantity information (cri-RSRP, ssb-Index-RSRP, etc.) is set.

[0030] For a UE in which the upper layer parameters (e.g., RRC parameter "groupBasedBeamReporting") included in the CSI report configuration information are set to be enabled, for each report configuration, a plurality of beam measurement resource IDs (e.g., SSBRI, CRI) and a plurality of corresponding measurement results (e.g., L1-RSRP) may be included in the beam report.

[0031] For a UE in which the number of RS resources to be reported for one or more is set by the upper layer parameters (e.g., RRC parameter "nrofReportedRS") included in the CSI report configuration information, for each report configuration, one or more beam measurement resource IDs and one or more corresponding measurement results (e.g., L1-RSRP) may be included in the beam report.

[0032] (TCI, spatial relation, QCL) In NR, it is considered to control at least one of the reception processing (e.g., at least one of reception, demapping, demodulation, decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, encoding) in a UE for at least one of a signal and a channel (expressed as a signal / channel) based on the Transmission Configuration Indication state (TCI state).

[0033] 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.

[0034] 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 a UE for each channel or each signal.

[0035] QCL is an indicator that shows the statistical properties of a signal / channel. For example, when a certain signal / channel and other signal / channels are in a QCL relationship, it may mean that at least one of Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter) is the same (QCL for at least one of these) among these different multiple signals / channels.

[0036] Note that the spatial Rx parameter may correspond to the receiving beam of the UE (e.g., receiving analog beam), and the beam may be specified based on spatial QCL. QCL (or at least one element of QCL) in the present disclosure may be read as sQCL (spatial QCL).

[0037] Multiple types (QCL types) of QCL may be defined. For example, four QCL types A - D with different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters (which may also be called QCL parameters) are shown as follows: · QCL type A (QCL - A): Doppler shift, Doppler spread, average delay, and delay spread, · QCL type B (QCL - B): Doppler shift and Doppler spread, · QCL type C (QCL - C): Doppler shift and average delay, · QCL type D (QCL - D): spatial Rx parameter.

[0038] The assumption that a given control resource set (Control Resource Set (CORESET)), channel, or reference signal is in a relationship of a specific QCL (e.g., QCL type D) with another CORESET, channel, or reference signal may be referred to as a QCL assumption for a UE.

[0039] Based on the TCI state or QCL assumption of a signal / channel, a UE may determine at least one of the transmission beam (Tx beam) and reception beam (Rx beam) of the signal / channel.

[0040] The TCI state may be, for example, information regarding the QCL between a target channel (in other words, a reference signal (Reference Signal (RS)) for the channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

[0041] In the present disclosure, the higher layer signaling may be, for example, any of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0042] The MAC signaling may use, for example, a MAC control element (MAC Control Element (MAC CE)), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0043] Physical layer signaling may be, for example, Downlink Control Information (DCI).

[0044] The channel for which the TCI state or spatial relation is set (specified) may be, for example, at least one of a Physical Downlink Shared Channel (PDSCH), a Physical Downlink Control Channel (PDCCH), a Physical Uplink Shared Channel (PUSCH), and a Physical Uplink Control Channel (PUCCH).

[0045] Also, the RS having a QCL relation with the channel may be, for example, at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a CSI-RS for tracking (also called a Tracking Reference Signal (TRS)), and a reference signal for QCL detection (also called a QRS).

[0046] The SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The SSB may be called an SS / PBCH block.

[0047] The information element of the TCI state (the "TCI-state IE" in RRC) set by the upper layer signaling may include one or more QCL information ("QCL-Info"). The QCL information may include at least one of information regarding the RS with QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may include information such as the index of the RS (e.g., SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (Identifier)), the index of the cell where the RS is located, and the index of the Bandwidth Part (BWP) where the RS is located.

[0048] In Rel.15 NR, as at least one TCI state of the PDCCH and PDSCH, both the RS of QCL type A and the RS of QCL type D, or only the RS of QCL type A can be set for the UE.

[0049] When the TRS is set as the RS of QCL type A, unlike the Demodulation Reference Signal (DMRS) for demodulating the PDCCH or PDSCH, it is assumed that the same TRS is transmitted periodically over a long period. The UE can measure the TRS and calculate the average delay, delay spread, etc.

[0050] For the UE that sets the TRS as the RS of QCL type A in the TCI state of the DMRS of the PDCCH or PDSCH, since it can be assumed that the parameters of QCL type A (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH and the TRS are the same, the parameters of type A (average delay, delay spread, etc.) of the DMRS of the PDCCH or PDSCH can be obtained from the measurement result of the TRS. When performing channel estimation for at least one of the PDCCH and PDSCH, the UE can use the measurement result of the TRS to perform more accurate channel estimation.

[0051] A UE configured with QCL type D RS can determine a UE receive beam (spatial domain receive filter, UE spatial domain receive filter) using the QCL type D RS.

[0052] The RS of QCL type X in a TCI state may mean an RS that is related to a certain channel / signal (its DMRS) and QCL type X, and this RS may also be called the QCL source of QCL type X in the TCI state.

[0053] (Inter-cell mobility) In NR, it is being considered that one or more transmission / reception points (TRPs) (multi-TRP (MTRP)) perform DL transmission to a UE. Also, it is being considered that a UE performs UL transmission to one or more TRPs.

[0054] And in future radio communication systems, inter-cell mobility (L1 / L2 inter-cell mobility) that facilitates more efficient (achieving lower latency and overhead) DL / UL beam management is being considered.

[0055] In L1 / L2 inter-cell mobility, it is possible to change the serving cell using functions such as beam control without RRC reconfiguration. In other words, it is possible to communicate with a non-serving cell without handover. Since a data communication unavailable period occurs, such as when RRC reconnection is required for handover, L1 / L2 inter-cell mobility without handover is preferred.

[0056] In inter-cell mobility (e.g., L1 / L2 inter cell mobility), it is conceivable for a UE to receive channels / signals from multiple cells / TRPs (see FIGS. 1A and 1B).

[0057] Figure 1A shows an example of inter-cell mobility including a non-serving cell (e.g., inter-cell mobility of a single TRP). A single TRP may mean a case where only one of the multi-TRPs performs transmission to the UE (which may also be called single mode). The CORESET pool index may indicate a single TRP. Here, an example is shown where the UE receives channels / signals from the base station / TRP of cell #1 that becomes the serving cell and the base station / TRP of cell #3 that is not the serving cell (non-serving cell). For example, it corresponds to the case where the UE switches from cell #1 to cell #3 (e.g., fast cell switch).

[0058] In this case, the TCI state may be updated by DCI / MAC CE, and the selection of ports (e.g., antenna ports) / TRPs / points may be performed dynamically. Different physical cell IDs (e.g., PCI) are set for cell #1 and cell #3.

[0059] Figure 1B shows an example of a multi-TRP scenario (e.g., multi-TRP inter-cell mobility when using multi-TRPs). Here, an example is shown where the UE receives channels / signals from TRP#1 and TRP2. Here, the case where TRP#1 exists in cell #1 (PCI#1) and TRP#2 exists in cell #2 (PCI#2) is shown.

[0060] Multi-TRP (TRP#1, #2) is connected by an ideal / non-ideal backhaul, and information, data, etc. may be exchanged. Different code words (Code Word (CW)) and different layers may be transmitted from each TRP of the multi-TRP. As a form of multi-TRP transmission, as shown in FIG. 1B, Non-Coherent Joint Transmission (NCJT) may be used. Here, the case where NCJT is performed between a plurality of cells (for example, cells with different PCI) is shown. Note that the same serving cell setting may be applied / set for TRP#1 and TRP#2.

[0061] In NCJT, for example, TRP#1 modulates and maps the first code word, layer-maps it, and transmits the first number of layers (for example, 2 layers) as the first signal / channel (for example, PDSCH) using the first precoding. Also, TRP#2 modulates and maps the second code word, layer-maps it, and transmits the second number of layers (for example, 2 layers) as the second signal / channel (for example, PDSCH) using the second precoding.

[0062] The plurality of PDSCHs (multi-PDSCH) subject to NCJT may be defined to partially or completely overlap with respect to at least one of the time and frequency domains. That is, at least one of the time and frequency resources of the first PDSCH from TRP#1 and the second PDSCH from TRP#2 may overlap.

[0063] These first PDSCH and second PDSCH may be assumed to be not quasi-co-located. The reception of the multi-PDSCH may be reinterpreted as the simultaneous reception of PDSCHs that are not of a certain QCL type (for example, QCL type D).

[0064] Multiple PDSCHs from multiple TRPs (which may also be referred to as multiple PDSCH) may be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single master mode). One DCI may be transmitted from one TRP of the multiple TRPs. The configuration that utilizes one DCI in multiple TRPs may be referred to as single DCI-based multiple TRPs (mTRP / MTRP).

[0065] A case where each of the multiple TRPs transmits a part of the control signal to the UE and the multiple TRPs transmit data signals (which may also be referred to as master-slave mode) may be applicable.

[0066] Multiple PDSCHs from multiple TRPs may be scheduled separately using multiple DCIs (multiple DCI (M-DCI), multiple PDCCH (multiple PDCCH)) (multiple master mode). The multiple DCIs may be transmitted from the multiple TRPs respectively. The configuration that utilizes multiple DCIs in multiple TRPs may be referred to as multiple DCI-based multiple TRPs (mTRP / MTRP).

[0067] The UE may be assumed to transmit separate CSI reports (CSI reports) for each TRP to different TRPs. Such CSI feedback may be referred to as separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" may be read interchangeably with "independent".

[0068] For inter-cell mobility using multi-TRP, it has been considered to use the Rel.15 / 16 TCI state mechanism, and for inter-cell mobility using single-TRP, a new mechanism has been considered. In the Rel.15 / 16 TCI state mechanism, CSI-RS can be set as the TCI state of PDSCH / PDCCH (DMRS of PDSCH / PDCCH) (the TCI state of PDSCH / PDCCH refers to CSI-RS). Also, SSB can be set as the TCI state of CSI-RS. However, SSB cannot be directly set as the TCI state of PDSCH / PDCCH. In the new Rel.17 mechanism using a unified TCI state (inter-cell mobility of single-TRP), setting SSB (directly) as the TCI state of PDSCH / PDCCH has been considered.

[0069] Note that setting X as the TCI state of PDSCH / DCCH, the TCI state of PDSCH / PDCCH referring to X, and the QCL source of PDSCH / PDCCH being X may be mutually interchangeable.

[0070] From the perspective of the base station (e.g., gNB), it is preferable to be able to set a large number (e.g., 64) of non-serving cells. Thereby, the UE can report beam reports regarding a large number of non-serving cells. The base station can indicate the TCI state associated with one of the large number of non-serving cells.

[0071] However, from the perspective of the UE, it is preferable to limit the number of non-serving cells that the UE measures / prepares for and the number of non-serving cells indicated by DCI as the TCI state indication. However, when RRC sets, for example, one non-serving cell, RRC reconfiguration is required for the UE to update the non-serving cell index it measures.

[0072] Although RRC configures many non-serving cells, when the MAC CE activates a limited (partial) number of non-serving cells (for example, when PCI #1 or #3 in FIG. 1 is an active non-serving cell / PCI), the complexity of UE processing is significantly reduced compared to the case without limitation.

[0073] Note that in advance, a list / set of non-serving cell indexes / PCIs may be configured by RRC, and an active non-serving cell index / PCI may be selected from them in a new MAC CE described later.

[0074] However, when using MAC CE for activation / deactivation of non-serving cells, it is not clear what configuration the MAC CE should have. If these are not clear, the activation of non-serving cells may not be performed appropriately, and there is a risk of throughput degradation or communication quality deterioration.

[0075] Therefore, the inventors conceived of a terminal that can appropriately activate non-serving cells.

[0076] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the respective embodiments may be applied individually or in combination.

[0077] In the present disclosure, CSI reports, beam reports, and L1 beam reports may be read as each other. Reports and measurements may be read as each other.

[0078] In the present disclosure, panel, Uplink (UL) transmission entity, point, TRP, spatial relationship, Control Resource SET (CORESET), PDSCH, codeword, base station, antenna port of a signal (e.g., Demodulation Reference Signal (DMRS) port), antenna port group of a signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CORESET subset, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer), may be read as each other. Also, panel Identifier (ID) and panel may be read as each other. In the present disclosure, TRP index, TRP ID, CORESET pool index, ordinal numbers (first, second) of TCI states in two TCI states, TRP, may be read as each other.

[0079] In the present disclosure, beam, spatial domain filter, spatial setting, TCI state, DL TCI state, UL TCI state, joint TCI state, unified TCI state, unified beam, joint TCI state of unified TCI state, DL / UL TCI state of unified TCI state, common TCI state, common beam, TCI assumption, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, UE reception beam, DL beam, DL reception beam, DL precoding, DL precoder, DL-RS, RS of QCL type D of TCI state / QCL assumption, RS of QCL type A of TCI state / QCL assumption, spatial relationship, spatial domain transmission filter, UE spatial domain transmission filter, UE transmission beam, UL beam, UL transmission beam, UL precoding, UL precoder, PL-RS may be read interchangeably with each other. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, SRS may be read interchangeably with each other.

[0080] In the present disclosure, single TRP, channel using single TRP, channel using one TCI state / spatial relationship, non-activation of multi-TRP by RRC / DCI, non-activation of multiple TCI states / spatial relationships by RRC / DCI, non-setting of one CORESET pool index (CORESETPoolIndex) value for any CORESET, and non-mapping of any code point of the TCI field to two TCI states may be read interchangeably with each other.

[0081] In the present disclosure, multi-TRP, channel using multi-TRP, channel using multiple TCI states / spatial relationships, activation of multi-TRP by RRC / DCI, activation of multiple TCI states / spatial relationships by RRC / DCI, at least one of multi-TRP based on single DCI and multi-TRP based on multi-DCI may be read interchangeably with each other.

[0082] In the present disclosure, cell, CC, carrier, BWP, and band may be read interchangeably with each other.

[0083] In the present disclosure, index, ID, indicator, and resource ID may be read interchangeably with each other.

[0084] In the present disclosure, "A / B" may be read as "at least one of A and B".

[0085] In the present disclosure, RS, beam, measurement result, and RS setting may be read interchangeably with each other. RS may mean at least one of CRI and SSBRI in the CSI report. L1-RSRP and L1-SINR may be read interchangeably with each other. SSB, SSB index, and SSBRI may be read interchangeably with each other.

[0086] In the present disclosure, non-serving cell, candidate serving cell, cell having a PCI different from that of the current serving cell, and another serving cell having a different PCI may be paraphrased with each other.

[0087] (Wireless communication method) <The first embodiment> The UE may receive a new MAC CE including at least one of the following fields (information) (1) to (3) used for activation / deactivation of a non-serving cell. The UE may control the transmission / reception of DL signals / UL signals with the non-serving cell based on the information. Note that the non-serving cell may be one or more. In the example shown below, a MAC CE including a plurality of fields indicating a plurality of non-serving cell indexes is applied.

[0088] (1) Serving cell ID. (2) BWP ID. (3) Non-serving cell ID used for activation. The non-serving cell ID may be replaced with any information corresponding to the non-serving cell (capable of identifying the non-serving cell).

[0089] As an example of (3), for example, any one of (3-1) to (3-5) may be applied. (3-1) PCI (PCI used directly). For example, 10 bits are used. (3-2) Recreation index of non-serving cell. For example, <new ID corresponding to non-serving cell> described later is applied. (3-3) CSI-ReportConfigId (when CSI-ReportConfig corresponds to one or more non-serving cells). (3-4) CSI-ResourceConfigId (when CSI-ResourceConfigId corresponds to one or more non-serving cells). (3-5) Bitmap indicating activation / deactivation of each non-serving cell. The size (number of bits) of the bitmap may be the same as the number of non-serving cells set on this CC. For example, when activating the second non-serving cell among three non-serving cells, "010" is set.

[0090] Activation / deactivation of non-serving cells may be applied to L1 beam measurement / reporting or other purposes / functions (see the fifth embodiment described later). For different purposes / functions, either the same MAC CE or different MAC CEs may be designed. When the same (one) MAC CE is designed for multiple purposes, the following Option 1 or Option 2 may be applied.

[0091] Option 1: The MAC CE may be applied to various purposes by defining the operations of the UE corresponding to the activated / deactivated non-serving cells. Option 2: The purpose is indicated as a field of the MAC CE, and a field indicating one or more purposes may be included in one MAC CE. Different non-serving cells / different RSs may be indicated for different purposes.

[0092] For each CSI report configuration by RRC, one or more reference signals (e.g., SSB) of non-serving cells may be configured for L1 beam reporting. In this case, the MAC CE may indicate the activated / deactivated non-serving cells corresponding to all CSI-ReportConfigIds.

[0093] In the MAC CE, for a serving cell, one or more non-serving cell IDs or any information in (3-1) to (3-5) may be indicated. The number of non-serving cells to be activated may be a fixed value, or a maximum of X varying numbers may be set for a single CSI report configuration. Since the MAC CE may include multiple serving cell IDs / non-serving cell IDs, the L1 beam reporting configuration of non-serving cells in multiple component carriers can also be indicated by one MAC CE.

[0094] [Specific Example] Figures 2A and 2B are diagrams showing a first example of the MAC CE of the first embodiment. In Figures 2A and 2B, it is assumed that there are seven non-serving cells. Figures 2A and 2B each include the above fields (1) to (3). The non-serving cell ID (Non-serving cell ID (3-bit)) may indicate one non-serving cell activated for L1 beam reporting. The number of bits of the non-serving cell ID does not have to be 3 bits and may vary according to the number (maximum number) of non-serving cells.

[0095] The "P" field may indicate whether there is a next octet (entry). The "P" field may indicate whether at least one of (1) to (3) exists in the MAC CE. Figure 2A corresponds to one component carrier. Figure 2B corresponds to multiple component carriers, and each component carrier includes the fields (1) to (3) and the "P" field.

[0096] Figures 3A and 3B are diagrams showing a second example of the MAC CE of the first embodiment. Figures 3A and 3B are different from Figures 2A and 2B in that the non-serving cell ID (Non-serving cell ID (3-bit)) is replaced by seven IDs (7-bit bitmap), and other points are the same. The seven IDs correspond to the above (3-5), and each of the seven IDs corresponds to a non-serving cell. The seven IDs may be expressed as T1, T2...T7. Figure 3A corresponds to one CC. Figure 3B corresponds to multiple CCs, and each CC includes fields (1) to (3) and the "P" field.

[0097] According to this embodiment, the MAC CE appropriately instructs the activation / deactivation of the non-serving cell.

[0098] <Second Embodiment> The UE may receive a new MAC CE including at least one of the following fields (information) (1) to (4) used for activation / deactivation of non-serving cells for L1 beam measurement / reporting (CSI measurement / reporting). Based on the information, the UE may control the transmission / reception of DL signals / UL signals with the non-serving cell and the L1 beam measurement / reporting of the non-serving cell. Note that the number of non-serving cells may be one or more. In the example shown below, a MAC CE including a plurality of fields indicating a plurality of non-serving cell indexes is applied.

[0099] (1) Serving cell ID. (2) BWP ID. (3) CSI report setting ID (CSI-ReportConfigId). The CSI report setting ID may correspond to the non-serving cell to be activated / deactivated. (4) Non-serving cell ID corresponding to the CSI report setting ID. The non-serving cell ID may be replaced by any information corresponding to the non-serving cell (identifying the non-serving cell).

[0100] As an example of (4), for example, any one of (4-1) to (4-4) may be applied. (4-1) PCI (directly used PCI). For example, 10 bits are used. (4-2) Re-creation index of non-serving cell. For example, <new ID corresponding to non-serving cell> described later is applied. (4-3) CSI-ResourceConfigId (when CSI-ResourceConfigId corresponds to one or more non-serving cells). (4-4) Bitmap indicating activation / deactivation of each non-serving cell. The size (number of bits) of the bitmap may be the same as the number of non-serving cells set on this CC. For example, when activating the second non-serving cell among three non-serving cells, "010" is set.

[0101] In each CSI report setting by RRC, RS (e.g., SSB) of one or more non-serving cells may be set for L1 beam reporting. In this case, the MAC CE may indicate the activated / deactivated non-serving cells corresponding to the CSI-ReportConfigId.

[0102] In the MAC CE, for the serving cell, there may be a case where one or more CSI report setting IDs or any information of (4-1) to (4-4) is indicated. The number of non-serving cells to be activated may be a fixed value, or a maximum variable number of X may be set for a single CSI report setting. One or more "CSI-ReportConfigId" may be indicated to update the non-serving cells corresponding to each CSI report setting for the serving cell. Since the MAC CE may include a plurality of serving cell IDs / non-serving cell IDs, the L1 beam report settings of non-serving cells in a plurality of CCs can also be indicated by one MAC CE.

[0103] [Specific Example] Figures 4A and 4B are diagrams showing an example of the MAC CE of the second embodiment. In Figures 4A and 4B, it is assumed that there are three non-serving cells. Figures 4A and 4B each include the above fields (1) to (4). The Non-serving cell ID may indicate one non-serving cell activated for L1 beam reporting. The number of bits of the Non-serving cell ID may vary according to the number (maximum number) of non-serving cells.

[0104] The "P" field may indicate whether the next octet (entry) exists. The "P" field may indicate whether at least one of (1) to (4) exists in the MAC CE. Figure 4A corresponds to one CC. Figure 4B corresponds to multiple CCs, and each CC includes the fields (1) to (4) and the "P" field.

[0105] According to this embodiment, the activation / deactivation of non-serving cells for L1 beam measurement / reporting (CSI measurement / reporting) is appropriately indicated using the MAC CE.

[0106] <Third Embodiment> The UE may receive a new MAC CE including at least one of the following fields (information) (1) to (3) used for the activation / deactivation of the CSI report setting (CSI-ReportConfig) for L1 beam measurement / reporting (CSI measurement / reporting) of non-serving cells. Based on the information, the UE may control the transmission / reception of DL signals / UL signals with non-serving cells and the L1 beam measurement / reporting of non-serving cells. Note that the number of non-serving cells may be one or more.

[0107] (1) Serving cell ID. (2) BWP ID. (3) CSI report setting ID (CSI-ReportConfigId).

[0108] As an example of (3), for example, either (3-1) or (3-2) may be applied. (3-1) A CSI report setting ID corresponding to one or more non-serving cells. Indicating the CSI report setting ID means activating / deactivating the L1 beam measurement / report of the corresponding non-serving cell. (3-2) A bitmap indicating the activation / deactivation of each CSI report setting. The size (number of bits) of the bitmap may be the same as the number of CSI report setting IDs set on this CC.

[0109] In the MAC CE, for the serving cell, multiple "CSI report setting IDs" may be indicated. Since the MAC CE can include multiple serving cell IDs / non-serving cell IDs, the L1 beam report setting (CSI report setting) of non-serving cells in multiple CCs can be indicated by one MAC CE.

[0110] According to this embodiment, the activation / deactivation of the CSI report setting for L1 beam measurement / report (CSI measurement / report) of non-serving cells is appropriately indicated using the MAC CE.

[0111] <Fourth Embodiment> The UE may receive a new MAC CE including a field (information) indicating the activation / deactivation of the reference signal (RS) (SSB) used for L1 beam measurement / report (CSI measurement / report) corresponding to each activated non-serving cell. The field may be added to the MAC CE of any of the first to third embodiments. The UE may control the transmission / reception of DL / UL signals with non-serving cells and the L1 beam measurement / report of non-serving cells based on the information. Note that the number of non-serving cells may be one or more.

[0112] The MAC CE may include the SSB index as the RS of the non-serving cell (RS corresponding to the non-serving cell). The SSB index may be replaced with any index corresponding to the SSB index (capable of identifying the SSB index). For example, the MAC CE may include any of the following (1) to (3).

[0113] (1) An explicit SSB ID or a bitmap indicating the activation / deactivation of each SSB ID. In this case, each bit corresponds to one SSB ID. (2) An explicit SSB group ID or a bitmap indicating the activation / deactivation of the SSB group ID. This field may be applicable when the SSB index is grouped into a plurality of SSB groups. (3) A CSI resource setting ID, a CSI-RS resource set ID, or a CSI-RS resource subset ID corresponding to the SSB.

[0114] In the MAC CE, multiple non-serving cells may be indicated for the serving cell. Since the MAC CE may include multiple serving cell IDs / non-serving cells, the L1 beam reporting settings of the non-serving cells in multiple CCs can also be indicated in one MAC CE.

[0115] In each embodiment, only the non-serving cell setting of one CC among the multiple CCs may be updated. The UE may apply the update of the same non-serving cell ID (and SSB) to other CCs in the CC list set by the same RRC.

[0116] In each embodiment, a new Logical Channel ID (LCID) corresponding to the new MAC CE may be applied. Also, a field indicating whether there is one or more specific fields in the MAC CE, or whether there is an additional specific field in the next octet (entry), may be included in the MAC CE. The field is, for example, the "P" field in FIGS. 2A, 2B, 3A, 3B, 4A, and 4B.

[0117] According to this embodiment, activation / deactivation of the RS (SSB) of the serving cell is appropriately indicated using the MAC CE.

[0118] <New ID corresponding to non-serving cell> The UE may receive a setting of a specific index (new ID: Re-indexing index of cell) that is different from the physical cell ID and indicates serving and non-serving cells, created based on the physical cell ID (Physical Cell Identifier: PCI). This new ID corresponds to the above (3-2) and (4-2). The UE may control the transmission of channel state information reports (CSI reports) corresponding to the set specific index.

[0119] As information indicating serving / non-serving cells, a new ID (for example, a recreated (re-index, re-numbered) index indicating a non-serving cell, a group ID of CMR) may be applied. The new ID may be set only for serving and non-serving cells that the UE uses (is available for).

[0120] This new ID may depend on RS setting signaling (CSI report setting / CSI resource setting). This new ID may, for example, indicate that "0" is the serving cell, "1" is non-serving cell #1, and "2" is non-serving cell #2. That is, this new ID may indicate either the serving cell or one or more non-serving cells.

[0121] The recreated index indicating the non-serving cell may be associated with a part of the PCI. By using the recreated index instead of the PCI, the number of information bits can be reduced, and the overhead of RRC signaling can be decreased. The recreated index may be referred to as a recreated index.

[0122] When there is one non-serving cell, the new ID may be the above-mentioned 1-bit indicator. For example, "0" may indicate the serving cell, and "1" may indicate the non-serving cell. Also, "1" may indicate the serving cell, and "0" may indicate the non-serving cell. The parameter name of the new ID is not limited to "New ID", "Re-indexing index of cell", etc., and any name may be used.

[0123] <UE capability> The UE may report (transmit) UE capability information indicating whether it supports at least one of each process in the present disclosure. Also, the UE may receive information indicating at least one of each process in the present disclosure by DCI / MAC CE / higher layer signaling, etc.

[0124] For example, the UE may transmit, as UE capability information, whether it supports the MAC CE for activating / deactivating the non-serving cell, whether it supports the MAC CE of each embodiment (at least one field in the MAC CE), or the allowable number of non-serving cells (or SSB for each non-serving cell) to be activated.

[0125] <The fifth embodiment> The MAC CE has a field indicating the TCI state. For example, when there are 7 non-serving cells, the UE needs to prepare to indicate one of the 7 non-serving cells by DCI. As a result, there is a problem that the number of bits of the DCI (the code point of the TCI) increases. Therefore, in order for the UE to perform the indicated preparation, another MAC CE may be required to further activate (indicate / designate / restrict / limit / narrow down) the active non-serving cells for beam indication.

[0126] FIG. 5 is a diagram showing an example of the TCI code point for the PDSCH specified in the DCI. In the example shown in FIG. 5, 8 TCI states / TCI code points corresponding to the serving cell and 7 non-serving cells are prepared. If the number of these TCI code points can be reduced (for example, to 3), the number of bits of the DCI can be reduced and the processing of the UE can be simplified.

[0127] The UE may receive a MAC CE (the first MAC CE) including information used for activation / deactivation of the non-serving cell, and receive a second MAC CE including information for further activating (indicating / designating / restricting / limiting / narrowing down) at least one of the active non-serving cells indicated by the first MAC CE. The UE controls the transmission and reception with the non-serving cell indicated in the second MAC CE. The first MAC CE and the second MAC CE may have the same configuration or different configurations. The second MAC CE may, for example, have the same configuration as the MAC CE shown in the first to fourth embodiments applied.

[0128] For example, the maximum number of configurable TCI states related to non-serving cells may be restricted by the value reported as UE capability information. That the TCI state is related to a non-serving cell means, for example, that the RS configured for QCL type A / D of the TCI state is related to the non-serving cell. That the RS is related to a non-serving cell may mean, for example, that the RS (SSB) of the non-serving cell is configured as the QCL source and that the PCI of the non-serving cell is configured.

[0129] [Analysis of the relationship of non-serving cells in multiple cases] Analyze the relationships of non-serving cells configured by RRC or activated by MAC CE for various purposes. For example, the following multiple cases of non-serving cells can be considered.

[0130] [Case 1] A non-serving cell provided by RRC as a non-serving cell configuration, for example, with a center frequency, SSB periodicity and position, SSB power, etc.

[0131] [Case 2] A non-serving cell for which CSI report configuration for L1 beam measurement / reporting is set by RRC. Note that the non-serving cell in Case 2 is a subset of Case 1.

[0132] [Case 3] A non-serving cell for which CSI report configuration of activated L1 beam measurement / reporting is set by MAC CE (for example, the non-serving cell in the second / third embodiments). The non-serving cell in Case 3 is a subset of Case 2.

[0133] [Case 4] A non-serving cell set as the QCL source RS in the QCL / TCI state setting by RRC. The non-serving cell in Case 4 is a subset of Case 1.

[0134] Regarding the correspondence between Case 4 and Case 2 or Case 3, the following options can be considered. Option 1: The non-serving cells of Case 4 may be a subset of the cells of Case 2 or the same as those of Case 2. Option 2: There is no restriction between Case 4 and Case 2. Option 3: The non-serving cells of Case 4 are a subset of the cells of Case 3 or the same as those of Case 3. Option 4: There is no restriction between Case 4 and Case 3.

[0135] [Case 5] The TCI state of the PDSCH updated by the MAC CE. Assume that the source RS (QCL source) of the TCI state is associated with the non-serving cell. The non-serving cells of Case 5 are a subset of the cells of Case 4 / Case 2 / Case 3.

[0136] [Case 6] The TCI state of the CORESET configured by the RRC. Assume that the source RS (QCL source) of the TCI state is associated with the non-serving cell. The scope of Case 6 may be the same as that of Case 4.

[0137] [Case 7] The TCI state of the CORESET updated by the MAC CE. Assume that the source RS (QCL source) of the TCI state is associated with the non-serving cell. The scope of Case 7 may be the same as that of Case 5.

[0138] Figure 6 is a diagram showing a first example of non-serving cells / TCI states included in Cases 1 to 5. Case 4 in Figure 6 corresponds to Option 1 of the above Case 4 and is assumed to have the same scope as that of Case 2.

[0139] Figure 7 is a diagram showing a second example of non-serving cells / TCI states included in Cases 1 to 5. Case 4 in Figure 7 corresponds to Option 3 of the above Case 4 and is assumed to have the same scope as that of Case 3.

[0140] For Cases 1, 2, 3, 4, 5, 6, and 7, the non-serving cell / TCI states covering Cases 1, 2, 3, 4, 5, 6, and 7 in this order may decrease, or may not be in this order.

[0141] For example, assume that the MAC CE (the third MAC CE) indicating a non-serving cell in which L1 beam measurement / reporting (CSI reporting) is activated and the MAC CE (the fourth MAC CE) indicating the beam (TCI state) of at least one of the non-serving cells are different MAC CEs. In this case, since the non-serving cell activated by the first MAC CE can be further limited by the second MAC CE, the overhead due to the MAC CE indication can be reduced. Note that the third MAC CE / fourth MAC CE may be the same as or different from the first MAC CE / second MAC CE.

[0142] For example, at least one of the CSI report settings for L1 beam measurement / reporting (e.g., CSI report settings corresponding to active non-serving cells) set by RRC may be indicated by a MAC CE (Cases 2, 3). Also, for example, at least one of the TCI states (e.g., TCI states corresponding to active non-serving cells) set by RRC may be indicated by a MAC CE (Cases 6, 7).

[0143] [Active non-serving cell] The UE may receive the same (one) or different MAC CEs including one or more purposes (instructions) for an active non-serving cell and including a common non-serving cell / RS instruction or different non-serving cell / RS instructions. For example, the following options are conceivable as instructions / processing for an active non-serving cell. The active non-serving cell may be the non-serving cell indicated in the first MAC CE or the second MAC CE described above.

[0144] [[Option 1]] The UE performs RSRP / SINR (beam) measurement / reporting (CSI reporting) on the active non-serving cell. The UE may perform L1 beam reporting or hybrid L1 / L3 beam reporting on the active non-serving cell.

[0145] [[Option 2]] The TCI state associated with the active non-serving cell may be indicated by RRC / MAC CE / DCI.

[0146] [[Option 2-1]] For example, only the TCI state associated with the active non-serving cell may be activated by a MAC CE (e.g., the MAC CE of 3GPP Rel. 16) for the TCI states of up to 8 PDSCHs. The non-serving cell of Case 5 is a subset of this option.

[0147] [[Option 2-2]] For example, only the TCI state associated with the active non-serving cell may be updated for the CORESET by a MAC CE (e.g., the MAC CE of 3GPP Rel. 16) for the TCI state of the CORESET. The non-serving cell of Case 7 may be a subset of this case.

[0148] [[Option 2-3]] For example, only the TCI state associated with the active non-serving cell may be indicated by DCI for the TCI state of the PDSCH.

[0149] [Inactive non-serving cell] For example, the following options are considered as instructions / processing for an inactive non-serving cell.

[0150] [[Option 1]] The UE may not need to perform RSRP / SINR (beam) measurement / reporting (CSI measurement report) on inactive non-serving cells.

[0151] [[Option 2]] The UE does not assume that the TCI state associated with an inactive non-serving cell will be indicated.

[0152] [[Option 2-1]] For example, when the MAC CE activates the TCI states of up to 8 PDSCHs, the UE does not assume that any of them (the TCI states) will be associated with an inactive non-serving cell.

[0153] [[Option 2-2]] For example, when the MAC CE activates the TCI state of a CORESET, the UE does not assume that any of them (the TCI states) will be associated with an inactive non-serving cell.

[0154] [[Option 2-3]] For example, when the DCI indicates the TCI state of a PDSCH, the UE does not assume that any of them will be associated with an inactive non-serving cell.

[0155] Assume case X where a new MAC CE is designed to indicate the above new purpose. For example, when only the relevant TCI states of active non-serving cells can be activated by the MAC CE (e.g., the MAC CE of 3GPP Rel.16) for the TCI states of up to 8 PDSCHs (Option 2-1 of [active non-serving cell] above), let that TCI state be case X.

[0156] Figure 8 is a diagram showing examples of non-serving cells / TCI states included in cases 1 to 5 and case X. Figure 8 is the same as Figure 6 except for case X. As shown in Figure 8, case X may have the same range as case 5.

[0157] As described above, only the TCI state associated with the active non-serving cell is updated, and the TCI state associated with the inactive non-serving cell is not indicated, so the processing of the UE can be simplified.

[0158] (Wireless communication system) Hereinafter, the configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure.

[0159] FIG. 9 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0160] Further, the wireless communication system 1 may support dual connectivity (multi-RAT dual connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0161] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the Master Node (MN), and the base station (gNB) of NR is the Secondary Node (SN). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0162] The wireless communication system 1 may support dual connectivity between a plurality of base stations within the same RAT (for example, dual connectivity where both the MN and the SN are base stations (gNBs) of NR (NR-NR Dual Connectivity (NN-DC))).

[0163] The wireless communication system 1 may include a base station 11 that forms a relatively wide-coverage macro cell C1, and a base station 12 (12a - 12c) that is disposed within the macro cell C1 and forms a small cell C2 that is smaller than the macro cell C1. The user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and the user terminal 20 are not limited to the modes shown in the figures. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0164] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) and dual connectivity (DC) using a plurality of component carriers (CCs).

[0165] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macro cell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands, definitions, etc. of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0166] Also, the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0167] The plurality of base stations 10 may be connected by wire (for example, an optical fiber compliant with Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the upper-level station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0168] The base station 10 may be connected to the core network 30 via another base station 10 or directly. The core network 30 may include at least one of, for example, Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0169] The user terminal 20 may be a terminal corresponding to at least one of communication systems such as LTE, LTE-A, and 5G.

[0170] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method may be used. For example, in at least one of the downlink (DL) and the uplink (UL), 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.

[0171] The wireless access method may be referred to as a waveform. Note that in the 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 wireless access methods of the UL and the DL.

[0172] In the wireless communication system 1, as a downlink channel, a physical downlink shared channel (PDSCH) shared by each user terminal 20, a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. may be used.

[0173] In the wireless communication system 1, as the uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc., which are shared by each user terminal 20, may be used.

[0174] User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH. User data, upper layer control information, etc. may be transmitted by PUSCH. Also, Master Information Block (MIB) may be transmitted by PBCH.

[0175] Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of PDSCH and PUSCH.

[0176] Note that the DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and the DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be read as DL data, and PUSCH may be read as UL data.

[0177] For PDCCH detection, a control resource set (CORESET) and a search space may be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0178] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", etc. in this disclosure may be read interchangeably with each other.

[0179] Uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (e.g., also referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) may be transmitted by PUCCH. A random access preamble for establishing a connection with the cell may be transmitted by PRACH.

[0180] Note that in this disclosure, downlink, uplink, etc. may be expressed without adding "link". Also, "Physical" may not be added at the beginning of various channels.

[0181] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may be transmitted.

[0182] The synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, an SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

[0183] Also, in the wireless communication system 1, as the uplink reference signal (Uplink Reference Signal (UL-RS)), a sounding reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. may be transmitted. Note that DMRS may also be called a UE-specific reference signal.

[0184] (Base station) FIG. 10 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may be provided.

[0185] In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processes of each part described below may be omitted.

[0186] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0187] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission / reception, measurement, etc. using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140. The control unit 110 may generate data, control information, a sequence, etc. to be transmitted as a signal and transfer it to the transmission / reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of a communication channel, state management of the base station 10, management of radio resources, etc.

[0188] The transmission / reception 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 transmission / reception unit 120 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0189] The transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122. The reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0190] The transmission / reception antenna 130 can be composed of an antenna described based on the common understanding in the technical field related to the present disclosure, such as an array antenna.

[0191] The transmission / reception unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 120 may receive the above-described uplink channel, uplink reference signal, etc.

[0192] The transmission / reception unit 120 may form at least one of a transmission beam and a reception beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0193] The transmission / reception unit 120 (transmission processing unit 1211) may perform processing of the Packet Data Convergence Protocol (PDCP) layer, processing of the Radio Link Control (RLC) layer (e.g., RLC retransmission control), processing of the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc. on, for example, data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0194] The transmission / reception unit 120 (transmission processing unit 1211) may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-to-analog conversion, etc. on the bit sequence to be transmitted, and output a baseband signal.

[0195] The transmission / reception unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission / reception antenna 130.

[0196] On the other hand, the transmission / reception unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmission / reception antenna 130.

[0197] The transmission / reception unit 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, etc. on the acquired baseband signal, and acquire user data, etc.

[0198] The transmission / reception unit 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0199] The transmission path interface 140 may transmit 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.

[0200] Note that the transmission unit and reception unit of the base station 10 in the present disclosure may be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0201] Note that the transmission / reception unit 120 may transmit a Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell.

[0202] The transmitting and receiving unit 120 may transmit the MAC CE including the channel state information (CSI) report setting ID corresponding to the non-serving cell. The transmitting and receiving unit 120 may transmit the MAC CE including information used for at least one of activation and deactivation of the CSI report setting ID corresponding to the non-serving cell. The transmitting and receiving unit 120 may transmit the MAC CE including information used for at least one of activation and deactivation of a reference signal used for CSI reporting and corresponding to an activated non-serving cell.

[0203] The control unit 110 may control transmission and reception in the non-serving cell based on the information.

[0204] The transmitting and receiving unit 120 may transmit a first Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell, and a second MAC CE including information indicating at least one of the active non-serving cells indicated in the first MAC CE.

[0205] The control unit 110 may control transmission and reception in the non-serving cell based on the information.

[0206] The transmitting and receiving unit 120 may transmit a third MAC CE indicating a non-serving cell in which channel state information (CSI) reporting is activated, and a fourth MAC CE indicating the transmission configuration indicator (TCI) state of at least one of the non-serving cells indicated in the third MAC CE.

[0207] The transceiver unit 120 may receive the CSI report of the active non-serving cell and does not necessarily need to receive the CSI report of the non-active non-serving cell. The control unit 110 may instruct the transmission configuration indication (TCI) state associated with the active non-serving cell and does not necessarily need to instruct the TCI state associated with the non-active non-serving cell.

[0208] (User Equipment) FIG. 11 is a diagram showing an example of the configuration of a user equipment according to an embodiment. The user equipment 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that one or more of the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may be provided.

[0209] In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it may be assumed that the user equipment 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

[0210] The control unit 210 controls the entire user equipment 20. The control unit 210 may be composed of a controller, a control circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0211] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0212] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc. described based on the common knowledge in the technical field related to the present disclosure.

[0213] The transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit. The transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222. The reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0214] The transmission / reception antenna 230 can be composed of an antenna described based on the common knowledge in the technical field related to the present disclosure, such as an array antenna.

[0215] The transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0216] The transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.

[0217] The transmission / reception unit 220 (transmission processing unit 2211) may perform processing of the PDCP layer, processing of the RLC layer (e.g., RLC retransmission control), processing of the MAC layer (e.g., HARQ retransmission control), etc. on, for example, data and control information obtained from the control unit 210, and generate a bit string to be transmitted.

[0218] The transmission / reception unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, digital-to-analog conversion, etc. on the bit string to be transmitted, and output a baseband signal.

[0219] Whether to apply DFT processing may be based on the settings of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is enabled, the transmission unit 220 (transmission processing unit 2211) may perform DFT processing as the above-mentioned transmission processing to transmit the channel using the DFT-s-OFDM waveform. Otherwise, it may not be necessary to perform DFT processing as the above-mentioned transmission processing.

[0220] The transmission and reception unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmission and reception antenna 230.

[0221] On the other hand, the transmission and reception unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmission and reception antenna 230.

[0222] The transmission and reception unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0223] The transmission and reception unit 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), reception 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.

[0224] Note that the transmission unit and reception unit of the user terminal 20 in the present disclosure may be configured by at least one of a transmission / reception unit 220 and a transmission / reception antenna 230.

[0225] Note that the transmission / reception unit 220 may receive a Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell.

[0226] The transmission / reception unit 220 may receive the MAC CE including a channel state information (CSI) report setting ID corresponding to the non-serving cell. The transmission / reception unit 220 may receive the MAC CE including information used for at least one of activation and deactivation of the CSI report setting ID corresponding to the non-serving cell. The transmission / reception unit 220 may receive the MAC CE including information used for at least one of activation and deactivation of a reference signal used for CSI reporting and corresponding to an activated non-serving cell.

[0227] The control unit 210 may control transmission and reception with the non-serving cell based on the information.

[0228] The transmission / reception unit 220 may receive a first Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell and a second MAC CE including information indicating at least one of the active non-serving cells indicated in the first MAC CE.

[0229] The transmission / reception unit 220 may receive a third MAC CE indicating a non-serving cell in which channel state information (CSI) reporting is activated and a fourth MAC CE indicating a transmission configuration indicator (TCI) state of at least one of the non-serving cells indicated in the third MAC CE.

[0230] The control unit 210 may control the transmission and reception with the non-serving cell indicated in the second MAC CE. The transmission / reception unit 220 may perform the transmission and reception with the non-serving cell indicated in the second MAC CE.

[0231] The control unit 210 may perform CSI reporting for the active non-serving cell and may not perform CSI reporting for the non-active non-serving cell. The control unit 210 may assume that a transmission configuration indication (TCI) state associated with the active non-serving cell is indicated and that a TCI state associated with the non-active non-serving cell is not indicated.

[0232] (Hardware Configuration) Note that the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (e.g., using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0233] Here, functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), assigning, etc. For example, a functional block (component) that enables transmission may be referred to as a transmitting unit, a transmitter, etc. In any case, as described above, the implementation method is not particularly limited.

[0234] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 12 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may physically be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0235] Note that in the present disclosure, terms such as device, circuit, device, section, unit, etc. can be read interchangeably with each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without including some devices.

[0236] For example, although only one processor 1001 is shown in the figure, there may be a plurality of processors. Also, the processing may be executed by one processor, or the processing may be executed by two or more processors simultaneously, sequentially, or using other methods. Note that the processor 1001 may be implemented by one or more chips.

[0237] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, controlling communication via the communication device 1004, or controlling at least one of reading and writing data in the memory 1002 and the storage 1003.

[0238] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a part of the above-described control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0239] Also, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and the same may be true for other functional blocks.

[0240] The memory 1002 is a computer-readable recording medium and may be constituted by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0241] The storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (e.g., a compact disc (Compact Disc ROM (CD-ROM), etc.)), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. The storage 1003 may be referred to as an auxiliary storage device.

[0242] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-described transceiver unit 120 (220), transceiver antenna 130 (230), etc. may be implemented by the communication device 1004. The transceiver unit 120 (220) may be physically or logically separated and implemented by a transmitter unit 120a (220a) and a receiver unit 120b (220b).

[0243] The input device 1005 is an input device for receiving an external input (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device for performing an output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.). Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

[0244] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0245] In addition, 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 the functional blocks may be realized using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0246] (Modified Example) Regarding the terms described in the present disclosure and the terms necessary for understanding the present disclosure, they may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be read interchangeably with each other. Also, a signal may be a message. A reference signal may also be abbreviated as RS and may be called a pilot, a pilot signal, etc. depending on the applicable standard. Also, a Component Carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, etc.

[0247] The radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may be called a subframe. Further, the subframe may be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) independent of numerology.

[0248] Here, the new numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The new numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0249] A slot may be composed of one or more symbols (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Also, a slot may be a time unit based on the new numerology.

[0250] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of 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.

[0251] A radio frame, sub-frame, slot, mini-slot, and symbol all represent time units for signal transmission. A radio frame, sub-frame, slot, mini-slot, and symbol may each be used with another corresponding name. Note that the time units such as frames, sub-frames, slots, mini-slots, and symbols in this disclosure may be read interchangeably with each other.

[0252] For example, one sub-frame may be called a TTI, or a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc. instead of a sub-frame.

[0253] Here, the TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used in each user terminal) to each user terminal in TTI units. Note that the definition of the TTI is not limited to this.

[0254] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), code block, codeword, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0255] In addition, when one slot or one mini-slot is called a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. Also, the number of slots (number of mini-slots) constituting the minimum time unit for the scheduling may be controlled.

[0256] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel.8 - 12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0257] Note that a long TTI (e.g., a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of a long TTI and not less than 1 ms.

[0258] A resource block (Resource Block (RB)) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or a plurality of consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0259] Also, an RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. may each be constituted by one or a plurality of resource blocks.

[0260] One or more RBs may also be referred to as a Physical Resource Block (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, etc.

[0261] Also, a resource block may be composed of one or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 sub-carrier and 1 symbol.

[0262] A Bandwidth Part (BWP) (which may also be referred to as a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (common RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. The PRB is defined in a certain BWP and may be numbered within the BWP.

[0263] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be set within one carrier for a UE.

[0264] At least one of the set BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that in the present disclosure, "cell", "carrier", etc. may be read as "BWP".

[0265] Note that the structures such as the above-described radio frame, subframe, slot, minislot, and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, Cyclic Prefix (CP) length, etc. within a TTI can be changed in various ways.

[0266] Also, the information, parameters, etc. described in the present disclosure may be represented using absolute values, relative values from a predetermined value, or another corresponding piece of information. For example, a radio resource may be indicated by a predetermined index.

[0267] The names used for parameters, etc. in the present disclosure are not limiting names in any way. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Since various channels (such as PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0268] The information, signals, etc. described in the present disclosure may be represented using any of various different technologies. 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.

[0269] Also, information, signals, etc. may be output from at least one of the upper layer to the lower layer and from the lower layer to the upper layer. Information, signals, etc. may be input and output via a plurality of network nodes.

[0270] The input / output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. The information, signals, etc. to be input / output may be overwritten, updated, or appended. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

[0271] The notification of information is not limited to the modes / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0272] Note that the physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Also, the RRC signaling may also be referred to as an RRC message and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. Further, the MAC signaling may be notified, for example, using a MAC Control Element (CE).

[0273] Also, the notification of predetermined information (e.g., the notification of "being X") is not limited to an explicit notification and may be performed implicitly (e.g., by not performing the notification of the predetermined information or by the notification of another piece of information).

[0274] The determination may be made based on a value represented by 1 bit (either 0 or 1), a boolean value represented by true or false, or a numerical comparison (e.g., comparison with a predetermined value).

[0275] 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, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by some other name.

[0276] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technologies (such as infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of the transmission medium.

[0277] The terms "system" and "network" used in this disclosure may be used interchangeably. "Network" may mean the devices (e.g., base stations) included in the network.

[0278] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", "panel", etc. can be used interchangeably.

[0279] In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. can be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0280] A base station can accommodate one or more (e.g., three) cells. When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0281] In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", and "terminal" can be used interchangeably.

[0282] 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.

[0283] At least one of the base station and the mobile station may also be called a transmitting device, receiving device, wireless communication device, etc. Note that at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanoid or unmanned). Note that at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0284] In addition, the base station in the present disclosure may be replaced by a user terminal. For example, with respect to a configuration in which communication between a base station and a user terminal is replaced by communication between a plurality of user terminals (which may be referred to as, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured to be functions of the user terminal 20. Also, terms such as "uplink" and "downlink" may be replaced with terms corresponding to communication between terminals (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be replaced with a sidelink channel.

[0285] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the functions of the above-described user terminal 20 may be configured to be functions of the base station 10.

[0286] In the present disclosure, operations assumed to be performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by a 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 thereto), or a combination thereof.

[0287] Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, with respect to the methods described in the present disclosure, elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0288] Each aspect / embodiment described in the present disclosure may be applicable to systems using Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is, for example, an integer or a 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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other suitable wireless communication methods, and next-generation systems extended based on these. Also, multiple systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).

[0289] As used in the present disclosure, the description "based on" does not mean "only based on" unless otherwise specified. In other words, the description "based on" means both "only based on" and "at least based on".

[0290] Any reference to an element using terms such as "first", "second", etc. used in this disclosure does not generally limit the quantity 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 form.

[0291] The term "determining" as used in this disclosure may encompass a wide variety of operations. For example, "determining" may be considered to be "judging", "calculating", "computing", "processing", "deriving", "investigating", "looking up, search, inquiry" (e.g., searching in a table, database, or another data structure), "ascertaining", etc.

[0292] 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.

[0293] Also, "determining" may be considered to be "resolving", "selecting", "choosing", "establishing", "comparing", etc. That is, "determining" may be considered to be "determining" any operation.

[0294] Also, the term "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

[0295] 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 thereof. For example, "connected" may be read as "accessed".

[0296] In this disclosure, when two elements are connected, they can be considered to be "connected" or "coupled" to each other using one or more electric wires, cables, printed electrical connections, etc., and also, by way of some non-limiting and non-exhaustive examples, using electromagnetic energy having wavelengths in the radio frequency region, microwave region, optical (both visible and invisible) region, etc.

[0297] In this disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate", "coupled", etc. may also be interpreted in the same way as "different".

[0298] In this disclosure, when the terms "include", "including" and their variations are used, these terms are intended to be inclusive, in the same way as the term "comprising". Further, the term "or" as used in this disclosure is not intended to be an exclusive disjunction.

[0299] In the present disclosure, for example, when articles are added by translation, such as a, an, and the in English, the present disclosure may include that the nouns following these articles are in the plural form.

[0300] As described above, the invention according to the present disclosure has been described in detail. However, it is obvious to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and does not impose any restrictive meaning on the invention according to the present disclosure.

Claims

1. A first Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell, and a second MAC CE including information indicating at least one of the active non-serving cells indicated in the first MAC CE. A receiving unit that receives; A control unit that controls transmission and reception with the non-serving cell indicated in the second MAC CE; A terminal having the above.

2. The receiving unit includes a third MAC CE that indicates a non-serving cell in which channel state information (CSI) reporting is activated, and a fourth MAC CE that indicates a TCI state of at least one of the non-serving cells indicated in the third MAC CE. receive The terminal according to claim 1.

3. The control unit performs CSI reporting on the active non-serving cell and does not perform CSI reporting on the inactive non-serving cell The terminal according to claim 1 or 2.

4. The control unit assumes that a transmission configuration indication (TCI) state associated with the active non-serving cell is indicated and a TCI state associated with the inactive non-serving cell is not indicated The terminal according to any one of claims 1 to 3.

5. Receiving a first Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell, and a second MAC CE including information indicating at least one of the active non-serving cells indicated in the first MAC CE; process, A step of controlling transmission and reception with the non-serving cell indicated in the second MAC CE; A wireless communication method for a terminal having the above.

6. A transmission unit that transmits a first Medium Access Control Control Element (MAC CE) including information used for at least one of activation and deactivation of a non-serving cell, and a second MAC CE including information indicating at least one of the active non-serving cells indicated in the first MAC CE. A control unit that controls transmission and reception in the non-serving cell indicated in the second MAC CE; A base station having the same.

Images