Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives at least one of first instruction information indicating an L1 / L2 inter-cell mobility procedure and second instruction information indicating an L3 mobility procedure; and a control unit that controls the L1 / L2 inter-cell mobility procedure on the basis of the first instruction information and controls the L3 mobility procedure on the basis of the second instruction information, the control unit performing control so that the L1 / L2 inter-cell mobility procedure and the L3 mobility procedure are not performed at the same time.

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 the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

[0003] Successor systems to LTE (e.g., also known as the fifth generation mobile communication system (5G), 5G+ (plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-Patent Document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (for example, wireless communication systems later than Rel.16 / 5G), it is envisaged that communications will be controlled based on inter-cell mobility including non-serving cells, or inter-cell mobility utilizing multiple transmitting and receiving points (for example, Multi-TRP (MTRP)).

[0009] However, when inter-cell mobility is applied, the problem arises of how to control UL transmission (e.g., timing advance control, cell switching, etc.). If inter-cell mobility cannot be properly implemented, there is a concern that communication quality will deteriorate.

[0010] The present disclosure has been made in view of this point, and one of its objects is to provide a terminal, a wireless communication method, and a base station that can appropriately control communication even when inter-cell mobility is performed.

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present disclosure includes: a receiving unit, which receives at least one of first indication information indicating an L1 / L2 inter-cell mobility process and second indication information indicating an L3 mobility process; and a control unit, which controls the L1 / L2 inter-cell mobility process based on the first indication information and controls the L3 mobility process based on the second indication information, and the control unit performs control so that the L1 / L2 inter-cell mobility process and the L3 mobility process are not performed at the same time.

[0013] Effects of the Invention

[0014] According to one aspect of the present disclosure, communication can be appropriately controlled even when inter-cell mobility is performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A as well as Figure 1B This is a diagram showing an example of inter-cell mobility.

[0016] Figure 2 This is a diagram showing an example of handover between a serving cell and an additional cell based on L1 / L2 signaling.

[0017] Figure 3 This is a diagram showing an example of setting example 1-3 when supporting candidate cells.

[0018] Figures 4A-4CThis is a diagram showing an example of switching of candidate cells / candidate cell groups based on L1 / L2 signaling in setting example 1-3 when candidate cells are supported.

[0019] Figure 5 This is a diagram showing an example of a timing advance group (TAG) to which cells included in a cell group belong.

[0020] Figure 6 This is a diagram showing an example of a MAC CE for a timing advance command.

[0021] Figure 7A as well as Figure 7B This is a diagram showing an example of TAG IDs set for a serving cell and a candidate cell.

[0022] Figure 8 This is a diagram showing an example of a case where L1 / L2 inter-cell mobility according to the first embodiment is successful.

[0023] Figure 9 This is a diagram showing another example in which the L1 / L2 inter-cell mobility according to the first embodiment is successful.

[0024] Figure 10 This is a diagram showing an example of a case where L1 / L2 inter-cell mobility fails according to the first embodiment.

[0025] Figure 11 This is a diagram showing another example of a case where L1 / L2 inter-cell mobility fails according to the first embodiment.

[0026] Figure 12A as well as Figure 12B This is a diagram showing an example of application of L1 / L2 inter-cell mobility and L3 mobility according to the second embodiment.

[0027] Figure 13A as well as Figure 13B This is a diagram showing another example of application of L1 / L2 inter-cell mobility and L3 mobility according to the second embodiment.

[0028] Figure 14 This is a diagram showing an example of activation of the TCI state for a serving cell and a candidate cell set to the same frequency.

[0029] Figure 15 This is a diagram showing an example of activation of the TCI status of the serving cell and the candidate cell involved in the third embodiment.

[0030] Figure 16 This is a diagram showing an example of inter-frequency cell handover according to the third embodiment.

[0031] Figure 17 This is a diagram showing another example of activation of the TCI status of the serving cell and the candidate cell involved in the third embodiment.

[0032] Figure 18 This is a diagram showing another example of activation of the TCI status of the serving cell and the candidate cell involved in the third embodiment.

[0033] Figure 19 This is a diagram showing another example of activation of the TCI status of the serving cell and the candidate cell involved in the third embodiment.

[0034] Figure 20 This is a diagram for explaining setting example #1 according to the third embodiment.

[0035] Figure 21 This is a diagram for explaining setting example #2 according to the third embodiment.

[0036] Figure 22 This is a diagram showing an example of the setting of intra-cell multi-TRP and inter-cell multi-TRP for the serving cell / candidate cell involved in the fourth embodiment.

[0037] Figure 23 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0038] Figure 24 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0039] Figure 25 This is a diagram showing an example of the configuration of a user terminal according to an embodiment.

[0040] Figure 26 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.

[0041] Figure 27 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0042] (TCI, spatial relationship, QCL)

[0043] In NR, research is underway to control the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) of at least one of a signal and a channel (expressed as signal / channel) in the UE based on the transmission configuration indication state (TCI state).

[0044] The TCI state may also indicate the state of a signal / channel applied to a downlink. A state equivalent to the TCI state applied to a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0045] The so-called TCI status is information related to the Quasi-Co-Location (QCL) of signals / channels, and can also be called spatial reception parameters, spatial relationship information, etc. The TCI status can also be set for each channel or each signal for the UE.

[0046] QCL is an indicator of the statistical properties of a signal / channel. For example, it can also mean that when a signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same among these different signals / channels (at least one of these is QCL).

[0047] In addition, the spatial reception parameter may also correspond to the UE's receive beam (e.g., receive analog beam), and the beam may also be determined based on spatial QCL. The QCL (or at least one element of QCL) in this disclosure may also be rewritten as sQCL (spatial QCL).

[0048] Multiple types (QCL types) may be specified for QCLs. For example, four QCL types AD may be provided. In these four QCL types AD, parameters (or parameter sets) that can be assumed to be the same are different. These parameters (also referred to as QCL parameters) are expressed as follows:

[0049] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0050] QCL type B (QCL-B): Doppler shift and Doppler spread,

[0051] QCL type C (QCL-C): Doppler shift and average delay,

[0052] QCL type D (QCL-D): spatial reception parameters.

[0053] The situation where the UE assumes that a certain control resource set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals can also be called QCL assumption.

[0054] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0055] The TCI status may also be information related to the QCL between the target channel (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RSs). The TCI status may also be set (indicated) through higher layer signaling, physical layer signaling, or a combination thereof.

[0056] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0057] MAC signaling may also use, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (MAC PDU). Broadcast information may also include, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and Other System Information (OSI).

[0058] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0059] In addition, the channel / signal that becomes the application object of the TCI state can also be called the target channel / reference signal (target channel / RS), abbreviated as target, etc., and the above-mentioned other signals can also be called reference reference signal (reference RS), source RS (source RS), abbreviated as reference, etc.

[0060] The channel for which the TCI state or spatial relationship is set (specified) may also be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0061] In addition, the RS that forms a QCL relationship with the channel may also be, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also known as a tracking reference signal (TRS)), a QCL detection reference signal (also known as QRS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), etc. At least one of the following may be used. The SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (physical broadcast channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0062] The RS of QCL type X in the TCI state may also refer to an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be called a QCL source of QCL type X in the TCI state.

[0063] (Inter-cell mobility)

[0064] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (Multi-TRP (MTRP)) are being studied for DL ​​transmission to the UE. In addition, the UE is being studied for UL transmission to one or more TRPs.

[0065] Consider that in inter-cell mobility (e.g., L1 / L2 inter-cell mobility), a UE receives channels / signals from multiple cells / TRPs (see Figure 1A , B).

[0066] Figure 1A An example of inter-cell mobility (e.g., single-TRP inter-cell mobility) including non-serving cells is shown. A UE may also be configured with one TRP (or single TRP) in each cell. Here, a case is shown where the UE receives channels / signals from the base station / TRP of cell #1, which is a serving cell, and the base station / TRP of cell #3, which is not a serving cell (a non-serving cell). For example, this corresponds to a case where the UE switches / changes from cell #1 to cell #3 (e.g., fast cell switch).

[0067] In this case, the selection of a port (e.g., antenna port) / TRP can also be performed dynamically. The selection of a port (e.g., antenna port) / TRP can also be performed based on the TCI status indicated or updated via a DCI / MAC CE. Here, a case is shown where different physical cell IDs (e.g., PCIs) are supported for cell #1 and cell #3.

[0068] Figure 1BAn example of a multi-TRP scenario (e.g., inter-cell mobility using multiple TRPs (Multi-TRP inter-cell mobility)) is shown. A UE may also be configured with multiple (e.g., 2) TRPs (or different CORESET pool indices) in each cell. Here, a case is shown where the UE receives channels / signals from TRP#1 and TRP2. Furthermore, a case is shown where TRP#1 corresponds to physical cell ID (PCI)#1 and TRP#2 corresponds to PCI#2.

[0069] Multiple TRPs (TRP#1, #2) can also be connected via ideal / non-ideal backhaul and exchange information, data, etc. The same or different code words (CW) and the same or different layers can also be sent from each TRP in the multiple TRPs. As a method of multiple TRP transmission, Figure 1B As shown, non-coherent joint transmission (NCJT) can also be used. Here, the case of performing NCJT between TRPs corresponding to different PCIs is shown. In addition, the same serving cell setting can also be applied / set for TRP#1 and TRP#2.

[0070] Multiple PDSCHs (multi-PDSCHs) that are NCJTed can also be defined to partially or completely overlap with respect to at least one of the time domain and the frequency domain. 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 can also overlap. The first PDSCH and the second PDSCH can be used for transmission in the same TB or in different TBs.

[0071] It is also possible to assume that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). Reception of multiple PDSCHs can also be rewritten as simultaneous reception of PDSCHs other than a certain QCL type (e.g., QCL type D).

[0072] Multiple PDSCHs from multiple TRPs (also referred to as multiple PDSCHs) can also be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single master mode). One DCI can also be sent from one TRP in multiple TRPs. The structure of using one DCI in multiple TRPs can also be called multi-TRP (mTRP / MTRP) based on single DCI.

[0073] Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCI (M-DCI), multiple PDCCHs (multiplePDCCH)) (multi-master mode). Multiple DCIs can also be sent separately from multiple TRPs. The structure of using multiple DCIs in multiple TRPs can also be called multi-TRP based on multiple DCIs (mTRP / MTRP).

[0074] The UE may also be configured to send separate CSI reports related to different TRPs. Such CSI feedback may also be referred to as separate feedback, separate CSI feedback, etc. In this disclosure, "separate" and "independent" may also be used interchangeably.

[0075] In Rel.17NR, it is assumed that MAC CE / DCI supports beam indication of TCI status associated with different PCIs. On the other hand, in Rel.18NR and later, it is assumed that L1 / L2 signaling (e.g., DCI / MAC CE) supports serving cell switching (e.g., indicating a change of serving cell to a cell with a different PCI) (see Figure 2 ).

[0076] exist Figure 2 , shows a situation where the UE switches cells from the serving cell to an additional cell (or also called a candidate cell or a target cell) based on a cell switching instruction from a base station.

[0077] (Candidate Cell)

[0078] In inter-cell mobility, it is also assumed that one or more candidate cells are set and managed for each serving cell.

[0079] For example, in a specific high-level parameter (e.g., ServingCellConfig), one or more candidate cells (Alt. 1) with limited information (e.g., only some parameters are notified to the UE) can be configured. This can also be done in the same way as inter-cell beam management (inter-cell BM) in existing systems (e.g., Rel. 17).

[0080] Alternatively, a complete configuration of one or more candidate cells (e.g., ServingCellConfig) may be configured, wherein the candidate cells are associated with each serving cell (Alt. 2). For example, the framework for carrier aggregation configuration (e.g., CA configuration framework) or the framework for CHO (Conditional Handover) / CPC (Conditional PSCell Change) configuration may be reused.

[0081] In Alt.1 / Alt.2, activation / deactivation of candidate cells can also be controlled through MAC CE / DCI.

[0082] As the candidate cell setting, at least one of the following setting examples 1 to 3 may be applied (see Figure 3 Here, an example of setting / association of candidate cells (or additional cells) for the serving cell / cell group, with SpCell#0, SCell#1, and SCell#2 as serving cells, is shown. The following setting examples 1 to 3 are examples, and the number of cells, associations between cells, etc. are not limited thereto and may be modified as appropriate. Alternatively, other setting examples may be supported / applied in addition to or in place of setting examples 1 to 3.

[0083] In the setting example 1, a case where one or more candidate cells are associated / set for each serving cell is shown (refer to Figure 3 ). Specifically, it shows that for SpCell#0, candidate cells #0-1, #0-2, and #0-3 are associated; for SCell#1, candidate cell #1-1 is associated; and for SCell#2, candidate cells #2-1 and #2-2 are associated. Information related to this association can also be set / indicated by the base station to the UE via RRC / MAC CE / DCI.

[0084] In the setting example 2, the case of associating / setting candidate cells with respect to the MAC entity / MCG / SCG is shown (refer to Figure 3). Specifically, the case of associating candidate cells #3-#8 for the MAC entity / MCG / SCG is shown. In this case, instead of associating candidate cells for each serving cell, candidate cells are set for the MAC entity or cell group (e.g., MCG / SCG). Information related to the candidate cells set for each cell can also be set / indicated from the base station to the UE via RRC / MAC CE / DCI.

[0085] In setting example 3, more than one candidate cell group may be set (see Figure 3 Specifically, the configuration of candidate cell group #1 including candidate cells #0-#2, candidate cell group #2 including candidate cells #0 and #1, and candidate cell group #3 including candidate cell #0 is shown. A candidate cell group may include one or more candidate cells. The candidate cells included in the candidate cell group may also be associated with at least one serving cell. Information related to the candidate cells may also be configured / indicated to the UE by the base station via RRC / MAC CE / DCI.

[0086] In existing systems (eg, Rel. 17), L1 beam indication of the TCI status associated with an additional PCI (or additional cell) is supported (eg, indication based on the TCI status field of the DCI).

[0087] In Rel. 18 and later, it is envisioned that new L1 / L2 signals (e.g., DCI / MAC CE) be supported for indicating a serving cell switch (e.g., serving cell switch). This indication is envisioned to support at least one of implicit and explicit indications. Implicit indication, for example, may mean that a CORESET is updated to a TCI state associated with an additional PCI via a MAC CE. Explicit indication may also mean that a cell switch is directly indicated via a DCI / MAC CE.

[0088] For example, in the example 1 of the candidate cell setting, a specific candidate cell may also be designated as a serving cell (or instructed to switch to a serving cell) via L1 / L2 signaling. Figure 4A , the case where candidate cell #0-2 becomes the SpCell of the MCG / SCG (SpCell #0 switches with candidate cell #0-2) through L1 / L2 signaling. Furthermore, the case where candidate cell #2-1 becomes the SCell of the MCG / SCG (SCell #2 switches with candidate cell #2-1) through L1 / L2 signaling is shown.

[0089] Alternatively, in the example 2 of setting the candidate cell, a specific candidate cell may also be designated as a serving cell (or instructed to switch to a serving cell) via L1 / L2 signaling. Figure 4B , a case is shown where the candidate cell #4 becomes the SpCell of the MCG / SCG (SpCell #0 is switched to the candidate cell #4) through L1 / L2 signaling.

[0090] Alternatively, in the candidate cell setting example 3, a specific candidate cell group (or one or more candidate cells included in the specific candidate cell group) may also be changed / updated to a serving cell group via L1 / L2 signaling. Figure 4C , shows the situation where the candidate cell group #1 (or the candidate cells #0-#2 included in the candidate cell group #1) becomes the serving cell group (the serving cell group and the candidate cell group #1 are switched) through L1 / L2 signaling.

[0091] (Timing Advance Group)

[0092] When multiple TRPs are used, the distance between the UE and each TRP is different. Multiple TRPs can also be included in the same cell (for example, a serving cell). Alternatively, one TRP among the multiple TRPs is equivalent to a serving cell, and the other TRPs are equivalent to non-serving cells. In this case, it is also assumed that the distance between each TRP and the UE is different.

[0093] In existing systems, the transmission timing of UL (uplink) channels and / or UL signals (UL channels / signals) is adjusted using a timing advance (TA). The reception timing of UL channels / signals from different user terminals (UEs) is also adjusted at the radio base station (also known as a TRP (Transmission and Reception Point), gNB (gNodeB), etc.).

[0094] The UE may perform UL transmission timing control by applying timing advance (multiple timing advances) for each preset timing advance group (TAG).

[0095] When multiple timing advances are used, support is provided for timing advance groups (TAGs) categorized by transmission timing. The UE can also apply the same TA offset (or TA value) to each TAG to control the UL transmission timing in each TAG. In other words, the TA offset can be independently set for each TAG.

[0096] When multiple timing advances are applied, the UE independently adjusts the transmission timing of cells belonging to each TAG, thereby enabling the radio base station to match the uplink signal reception timing from the UE even when multiple cells are used.

[0097] TAGs (for example, service cells belonging to the same TAG) can also be set through high-layer parameters. The same timing advance value can also be applied to service cells belonging to the same TAG (for example, service cells configured with UL). The timing advance group of the SpCell containing the MAC entity can also be called a primary timing advance group (PTAG), and other TAGs can also be called secondary timing advance groups (STAGs). In addition, for each cell group (for example, MCG / SCG), the maximum number of TAGs can also be X (for example, X=4).

[0098] In the existing system (e.g., Rel.16NR), each cell group (e.g., MCG / SCG) supports a maximum of 4 TAG settings (see Figure 5 ).exist Figure 5 , shows the case where three tags are configured for a cell group including SpCell and SCell#1 to #4. Here, it is shown that SpCell and SCell#1 belong to the first TAG (PTAG or TAG#0), SCell#2 and SCell#3 belong to the second TAG (TAG#1), and SCell#4 belongs to the third TAG (TAG#2).

[0099] A timing advance command (TA command) can also be sent to the UE using a MAC control element (e.g., a MAC CE). The TA command indicates the transmission timing value for the uplink channel and is included in the MAC control element. The TA command is signaled from the radio base station to the UE at the MAC layer. Upon receipt of the TA command, the UE controls a specific timer (e.g., a TA timer).

[0100] The MAC CE for the timing advance command may also be a structure including a field for the timing advance group index (eg, TAG ID) and a field for the timing advance command (see Figure 6 The TAG ID field is used to indicate the TAG ID of the TAG specified by the address. The Timing Advance Command field may also indicate an index value T used in controlling the amount of timing adjustment that the MAC entity must apply. A (0, 1, 2…63).

[0101] Parameters corresponding to each TAG ID can also be set using higher-layer parameters. For example, parameters such as a time alignment timer (e.g., timeAlignmentTimer) corresponding to each TAG ID can also be set. Alternatively, the TAG ID can be set for each serving cell using higher-layer parameters (e.g., tag-ID included in ServingCellConfig). Furthermore, after being set using higher-layer parameters, the TAG ID / parameters can be updated via MAC CE.

[0102] The time alignment timer can also be maintained for UL time alignment. In Rel. 17, the time alignment timer can also be set / associated for each TAG. When the UE receives a MAC CE for a timing advance command (e.g., a TAC MAC CE), it starts or restarts (restarts) the time alignment timer associated with each indicated timing advance group (e.g., TAG).

[0103] The MAC entity receives the TAC MAC CE and maintains a specific value (N TA ), apply the timing advance command for the indicated TAG, or start or restart the time alignment timer associated with the indicated TAG. TA ) can also be the timing advance between DL and UL.

[0104] The operation when the time alignment timer expires (expires) can also be defined separately for PTAG and STAG. In addition, the timing advance group (TAG) of the SpCell including the MAC entity can be called the primary timing advance group (PTAG), and the other TAGs can be called secondary timing advance groups (STAG).

[0105] For example, Rel. 17 supports applying a specific PTAG operation when a timing advance timer corresponding to a PTAG expires, and applying a specific STAG operation when a timing advance timer corresponding to a STAG expires.

[0106] For example, when the time alignment timer expires, the following operations (eg, operations for a specific PTAG / operations for a specific STAG) may be performed.

[0107] [Specific PTAG operation]

[0108] When the time alignment timer is associated with PTAG,

[0109] • Flush all HARQ buffers of all serving cells.

[0110] If configured, the RRC is notified to release the PUCCH for all serving cells.

[0111] If configured, the RRC is notified to release the SRS.

[0112] Clear all configured DL allocations and configured UL allocations.

[0113] Clear PUSCH resources used for semi-persistent CSI reporting.

[0114] · Expire all running time alignment timers.

[0115] Maintain N for all tags TA .

[0116] [Specific STAG operation]

[0117] When the time alignment timer is associated with a STAG, for all serving cells belonging to the TAG,

[0118] • Flush all HARQ buffers.

[0119] ●When configured, notify RRC to release PUCCH.

[0120] ●When configured, notify RRC to release SRS.

[0121] ●Clear all configured DL allocations and UL allocations.

[0122] ● Clear PUSCH resources used for semi-persistent CSI reporting.

[0123] ●Maintain the N of this TAG TA .

[0124] As described above, when candidate cells are configured / defined, it is assumed that each candidate cell is associated with a TAG (see Figure 7A 、 Figure 7B ). Figure 7A An example of TAG (or TAG ID setting) for each cell group in an existing system (e.g., prior to Rel. 17) is shown. Figure 7B An example of TAG ID setting for each candidate cell is shown.

[0125] In addition, in the case where the candidate cell is set / applied / supported, e.g. Figure 7BAs shown, it is assumed that different serving cells / different candidate cells are associated with the same TAG.

[0126] When the TA of the candidate cell is obtained, RACH (or random access procedure) to the candidate cell may also be supported.

[0127] Thus, when candidate cells are configured, applied, or supported, inter-cell mobility (e.g., switching from a serving cell to a candidate cell (or additional cell / target cell)) is envisioned. However, how to control such a situation has not been fully studied. If switching between a serving cell and a candidate cell (e.g., inter-cell mobility) is not performed appropriately, there is a concern that communication quality may deteriorate.

[0128] The inventors of the present invention focused on inter-cell mobility (e.g., cell switching) when candidate cells (or additional cells, target cells) are set / supported, studied appropriate control methods for the inter-cell mobility, and came up with the present embodiment.

[0129] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following aspects (eg, each situation) may be used alone or in combination of at least two.

[0130] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C."

[0131] In the present disclosure, activation, deactivation, indication (or indication), selection, configuration, update, determination, etc. may also be mutually rephrased. In the present disclosure, support, control, controllable, operation, and operation may also be mutually rephrased.

[0132] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings, etc. can also be overwritten. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. can also be overwritten.

[0133] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0134] In the present disclosure, MAC signaling may include, for example, a MAC Control Element (MACCE) and a MAC Protocol Data Unit (PDU). Broadcast information may include, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and other system information (Other System Information (OSI)).

[0135] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0136] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. can also be overwritten with each other. In the present disclosure, sequence, list, set (set), group, group, cluster, subset, etc. can also be overwritten with each other.

[0137] In the present disclosure, panel, UE panel, panel group, beam, beam group, precoder, uplink (UL) transmitting entity, transmission / reception point (Transmission / Reception Point (TRP))), base station, spatial relation information (SRI)), spatial relation, SRS resource indicator (SRSResource Indicator (SRI)), control resource set (CORESET)), physical downlink shared channel (PDSCH)), codeword (Codeword (CW)), transport block (TB), reference signal (RS), antenna port (e.g., demodulation reference signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, code division multiplexing (CDM)) group, reference signal group, CORESET group, physical uplink control channel (PDSCH), etc. Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state (TCI state)) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (QCL)), QCL assumptions, etc. can also be rewritten with each other.

[0138] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) can be overwritten. "Spatial relationship information" can also be overwritten with "a collection of spatial relationship information," "one or more spatial relationship information," and so on. TCI state and TCI can also be overwritten.

[0139] In the following embodiments, "plurality" and "two" may be replaced with each other. In addition, "TAG" and "TAGID" may be replaced with each other. In addition, "cell", "CC" and "carrier" may be replaced with each other.

[0140] The following description can be applied to inter-cell mobility (e.g., L1 / L2 inter-cell mobility) as well as communication control other than inter-cell mobility. L1 / L2 inter-cell mobility can also be rewritten as at least one of cell handover, cell switch, and cell change.

[0141] (Wireless Communication Method)

[0142] <First embodiment>

[0143] In the first embodiment, an example of UE operation and base station operation when (or after) receiving a cell switching instruction will be described.

[0144] The base station may also configure information related to the structure of multiple candidate cells for the UE via higher layer signaling. The higher layer signaling may be RRC reconfiguration signaling (eg, RRC reconfiguration signaling), higher layer parameters related to the cell, or other higher layer parameters.

[0145] In addition, the base station can also use MAC CE / DCI to indicate to the UE whether to change or switch the serving cell. The UE performs the cell handover process / handover operation based on the cell handover indication indicated by the MAC CE / DCI. The cell handover indication can also be called cell handover indication signaling or L1 / L2 inter-cell mobility indication.

[0146] At least one of information related to the candidate cell that becomes the switching target (e.g., candidate cell index or physical cell ID (PCI)), information related to the serving cell that becomes the switching source, and information related to other candidate cells may also be included in the MAC CE / DCI.

[0147] In the present disclosure, changing the serving cell may also be rewritten as switching the serving cell, switching the serving cell, or L1 / L2 cell switching (eg, L1 / L2 cell switch). In the present disclosure, instructing a change in the serving cell may also be rewritten as activating / validating the change in the serving cell.

[0148] When a change of serving cell is instructed, the UE may assume that L1 / L2 inter-cell mobility is enabled.

[0149] Upon receiving information indicating a change in serving cell (or to a candidate cell), the UE may also change the serving cell configuration to the target cell (or candidate cell) based on the cell configuration pre-set using higher-layer parameters. The UE may also assume the new beam / TCI state / spatial relationship and receive DL transmissions from the target cell. Information related to the new beam / TCI state / spatial relationship may also be pre-set / indicated to the UE by the base station using higher-layer parameters (e.g., higher-layer parameters related to candidate cells).

[0150] Even if information related to a new beam / TCI state / spatial relationship is not set / indicated, the UE may assume a specific beam / TCI state / spatial relationship. The specific beam / TCI state / spatial relationship may also be determined based on the PRACH transmission of the target cell (or candidate cell). For example, the UE may determine / assume a specific beam / TCI state / spatial relationship based on the latest PRACH transmission associated with the SSB of the target cell.

[0151] Furthermore, upon detecting a MAC CE / DCI indicating a change in serving cell (or a change to a candidate cell), the UE may change to the serving cell configured by the updated cell's RRC configuration (e.g., the candidate cell's RRC configuration) after a specific period. In the present disclosure, the specific period may also be rewritten as a specific offset.

[0152] The specific period may also be X ms or X symbols from the time of the detected MAC CE / DCI. Alternatively, the specific period may be Y ms or Y symbols from the time of the HARQ-ACK feedback for the detected MAC CE / DCI. X and Y may be determined based on UE capabilities / UE type, defined in the specification, or configured by the base station for the UE.

[0153] In this manner, when a cell handover (e.g., L1 / L2 inter-cell mobility) is successful, the target cell is considered to be the serving cell for controlling transmission and reception operations. In this case, the success / failure of the cell handover can also be defined as follows. Options 1A-1 to 1A-3 illustrate an example of a successful cell handover (e.g., L1 / L2 inter-cell mobility), and Options 1B-1 to 1B-2 illustrate an example of a failed cell handover (e.g., L1 / L2 inter-cell mobility).

[0154] [Option 1A-1]

[0155] Alternatively, when the UE sends a HARQ-ACK in response to a handover instruction for the serving cell, it indicates that the cell handover is successful and controls the UE operation / base station operation. HARQ-ACK can also mean ACK (ACKnowledgement) (see Figure 8 ), can also mean ACK / NACK.

[0156] Figure 8 This figure shows a case where a base station transmits a serving cell handover indication (e.g., L1 / L2 cell switch indication signaling) to a UE, and the UE transmits an ACK in response to the handover indication, indicating successful cell handover. This figure also shows a case where handover to a new serving cell is controlled after a specific period (e.g., Y) following successful cell handover (e.g., after an ACK is transmitted).

[0157] When HARQ-ACK means ACK, even if the UE sends NACK (before sending ACK), it may not mean that the cell switching is successful. In other words, NACK feedback or L1 / L2 signaling retransmission may exist before ACK is sent.

[0158] For example, when the switching indication of the serving cell is indicated through MAC CE, it can also be defined that the switching of the serving cell is successful when the HARQ-ACK feedback for the PDSCH transmitting the MAC CE is ACK.

[0159] When the serving cell switching instruction is indicated through DCI, the definition of ACK may also differ depending on whether the DCI includes DL allocation / UL allocation (for example, DL assignment / UL assignment).

[0160] When a DCI including a DL allocation (eg, DL assignment) is used to indicate switching of a serving cell, it may be defined that the switching of the serving cell is successful when the HARQ-ACK feedback for the PDSCH scheduled by the DCI is ACK.

[0161] In the case where a DCI that does not include a DL allocation / UL allocation (e.g., DL assignment / UL assignment) is used to indicate a handover of a serving cell, it can also be defined as a case where the HARQ-ACK feedback for the DCI (or the PDCCH transmitting the DCI) is ACK, indicating that the handover of the serving cell is successful. In this case, the CRC attached to the DCI can also be scrambled by a specific RNTI (e.g., an RNTI other than the C-RNTI).

[0162] When a DCI containing an UL allocation (e.g., UL assignment) is used to indicate a handover of a serving cell, the PUSCH scheduled by the DCI can also be regarded as HARQ-ACK feedback with ACK. That is, it can also be defined as indicating that the handover of the serving cell is successful based on the feedback of the PUSCH. Alternatively, it can also be defined as indicating that the handover of the serving cell is successful when the base station reschedules the PUSCH with the same HPN (the same HPN with the NDI toggled).

[0163] [Option 1A-2]

[0164] Alternatively, when the UE receives DL from a new target cell (or a candidate cell to be changed to) within a specific window / timer (e.g., a certain window / timer), it means that the cell handover is successful, and the UE operation / base station operation (see Figure 9 ). The DL received by the UE may also be rewritten as at least one of DL transmission, DL signal, and DL channel.

[0165] The specific window / timer may also start, for example, after the HARQ-ACK (e.g., ACK) indicating the handover of the serving cell is sent, or after a specific period (e.g., Y) has passed after the HARQ-ACK is sent. Of course, the start time of the specific window / timer is not limited to this. The specific window / timer (e.g., at least one of the start time (start time slot, start codeword, etc.) and length) may be defined in the specification or may be set / indicated to the UE from the base station using RRC parameters / MAC CE / DCI.

[0166] The DL received by the UE may also be at least one of the following options 1A-2-1 to 1A-2-3.

[0167] Option 1A-2-1

[0168] The DL signal received by the UE may also be a DL reference signal (e.g., a DL-RS). For example, if the UE receives (or measures) a DL reference signal sent from the new target cell, it may indicate that the serving cell has been successfully handed over. The DL reference signal may also be at least one of an SSB, a CSI-RS, and a source RS (source RS) with an indicated TCI state sent from the new target cell.

[0169] Option 1A-2-2

[0170] The DL received by the UE may also be a DL channel (e.g., PDCCH / PDSCH) or downlink control information (e.g., DCI). For example, when the UE receives (or decodes / detects / monitors) a DL channel / DCI sent from a new target cell, it may also mean that the handover of the serving cell is successful. The DL channel (e.g., PDCCH / PDSCH) or DCI may also be a PDCCH / PDSCH corresponding to a specific format / type.

[0171] For example, when the UE receives DCI in a common search space (eg, CSS), it may mean that the handover of the serving cell is successful.

[0172] Alternatively, when the UE receives a PDCCH / PDSCH with the same HARQ process ID as in previous L1 / L2 cell switch signaling (e.g., previous L1 / L2 cell switch signaling), it may indicate that the serving cell has been successfully switched. The previous L1 / L2 cell switch signaling may also include a toggled NDI (assuming no MAC reset).

[0173] Option 1A-2-3

[0174] The DL received by the UE may also be an explicit indication for confirming (or activating or validating) the handover of the serving cell. The explicit indication may be, for example, an RRC parameter / MAC CE / DCI corresponding to the explicit indication.

[0175] In at least one of options 1A-2-1 to 1A-2-3, RACH transmission (or RACH procedure) to the new target cell may be terminated before cell switching, and a TA to the new target cell may be acquired before cell switching.

[0176] [Option 1A-3]

[0177] It is also possible to control the UE operation / base station operation when the UE completes the random access process (or RACH process) for the new target cell (or the candidate cell that becomes the target of the change) within a specific window / timer (for example, a certain window / timer), which means that the cell switching is successful.

[0178] In option 1A-3, RACH transmission (or RACH procedure) to the new target cell may not be performed before cell switching, or TA may not be acquired. In this case, the UE may perform the RACH procedure after switching to the new serving cell.

[0179] [Option 1B-1]

[0180] Alternatively, if a specific DL signal cannot be received before the end / expiration of a specific window / timer (or within a specific window / timer) (after the UE sends a HARQ-ACK (e.g., ACK) in response to a handover indication of the serving cell, or after the UE applies a handover to a new target cell), the handover of the cell may fail (see Figure 10 、 Figure 11 ). The specific window / timer and the specific DL may also be the window / timer and DL shown in Option 1A-2.

[0181] Figure 10 It shows the situation where after the UE sends HARQ-ACK (e.g., ACK) for the handover indication of the serving cell, it fails to receive a specific DL before the end / expiration of a specific window / timer (or within a specific window / timer). Figure 11 It shows the case where the UE fails to receive a specific DL before the end / expiry of a specific window / timer (or within a specific window / timer) after applying handover to a new target cell.

[0182] In this case, the UE may also declare / notify / report that a cell handover (eg, L1 / L2 inter-cell mobility) has failed, or that a cell handover (eg, L1 / L2 inter-cell mobility) has failed.

[0183] The duration of a specific window / timer (e.g., start time / length, etc.) can be configured by the base station to the UE via RRC parameters or can be included in a MAC CE / DCI indicating a cell handover and indicated by the base station to the UE. The start time can also be the start slot or the start symbol.

[0184] [Option 1B-2]

[0185] A cell handover failure may also be indicated when the UE fails to complete a random access procedure (or RACH procedure) to a new target cell before the end or expiration of a specific window or timer (or within a specific window or timer). In this case, the UE may also declare / notify / report that a cell handover (e.g., L1 / L2 inter-cell mobility) has failed, or that a cell handover (e.g., L1 / L2 inter-cell mobility) has failed.

[0186] In the event of cell handover failure (eg, option 1B-1 or option 1B-2), the UE may also apply UE operations shown in at least one of the following options 1-1 to 1-3.

[0187] Option 1-1

[0188] The UE may also return to the original serving cell (eg, the serving cell of the handover source) and apply the last TCI state in the cell to monitor DL ​​transmission (eg, PDCCH).

[0189] After the UE sends a HARQ-ACK (e.g., ACK) indicating a handover for the serving cell, if it fails to receive DL within a specific window / timer (Option 1B-1) or the RACH process is not completed (Option 1B-2), at least the ACK transmission is successful. In this case, the channel quality of the original serving cell is good, and there is a possibility that communication (e.g., DL reception) can be performed properly.

[0190] Option 1-2

[0191] The UE may also perform a RACH transmission (or random access procedure) for a specific cell (e.g., a certain cell). The specific cell may also be at least one of the original serving cell (e.g., the serving cell of the handover source) and the new target cell. For example, the random access procedure during radio link failure (RLF) may also be reused.

[0192] Options 1-3

[0193] The UE may also perform RACH transmission (or random access procedure) for any cell (eg, ayn cell), for example, the random access procedure performed by a UE in idle state (UE in IDLE) may be reused.

[0194] Regarding different UE operations after a cell handover (eg, L1 / L2 inter-cell mobility) fails, UE capabilities may also be introduced.

[0195] <Second embodiment>

[0196] In the second embodiment, an example of UE operation and base station operation in the case of supporting different mobility procedures (or cell change procedures) will be described.

[0197] After Rel. 18, support for L1 / L2 inter-cell mobility (e.g., R18 L1 / L2 inter-cell mobility) and L3 mobility (e.g., legacy L3 mobility) is also envisioned. L3 mobility can also include handover, CHO (e.g., Conditional Handover), or CPC (Conditional PSCell Change). In such cases, it is necessary to appropriately control the interaction of multiple (here, two) processes (or the presence or absence of conflict / operation in the event of a conflict).

[0198] When multiple mobility processes are supported, at least one of the following options 2-1 to 2-4 may also be applied. The mobility process may also be rewritten as a cell change process, a cell switching process, a cell transfer process, or a cell update process. In addition, in the following description, as multiple mobility processes, first mobility (e.g., L1 / L2 inter-cell mobility) and second mobility (e.g., L3 mobility) are listed as examples, but the mobility types / types are not limited thereto. The L3 mobility process may also reuse the process (e.g., handover process) of an existing system (e.g., before Rel. 17).

[0199] [Option 2-1]

[0200] Assume that the first mobility procedure (e.g., L1 / L2 inter-cell handover procedure) is ongoing. The so-called L1 / L2 inter-cell handover procedure is ongoing, for example, when the UE has received the signaling indicating the L1 / L2 cell handover (and before the cell handover is completed).

[0201] In this case, the UE may not assume the reception of the second mobility indication / execution of the second mobility procedure before the L1 / L2 cell handover procedure is completed (or successful) (see Figure 12A The so-called "before the L1 / L2 cell switching process is completed (or succeeded)" may also refer to before the success or failure of the cell switching shown in the first embodiment.

[0202] This provides a configuration in which the second mobility is not performed while the first mobility (for example, a cell handover process between L1 / L2 cells) is in progress, thereby preventing the two mobility processes from occurring simultaneously.

[0203] [Option 2-2]

[0204] Assume that the second mobility procedure (e.g., L3 mobility procedure) is in progress. In this case, the UE may also assume that it does not receive the first mobility indication (e.g., L1 / L2 cell handover indication signaling) before the L3 mobility procedure (e.g., handover / CHO / CPC) is completed (see Figure 12B ).

[0205] As a result, a structure is achieved in which the first mobility (for example, the cell switching process between L1 / L2 cells) is not performed while the second mobility (for example, the switching process) is in progress, thereby avoiding the situation where the two mobility processes occur at the same time.

[0206] [Option 2-3]

[0207] When a first mobility procedure (e.g., a cell handover procedure between L1 / L2 cells) is in progress, reception of a second mobility indication / execution of a second mobility procedure may be permitted / supported before the L1 / L2 cell handover procedure is completed (or successful). In other words, conflict between the first mobility procedure and the second mobility procedure may be permitted / supported.

[0208] When an L3 handover command is received before the L1 / L2 cell handover process is completed (or successful) (or when the UE determines that the CHO / CPC conditions are met), at least one of the following options 2-3-1 to 2-3-3 may also be applied.

[0209] Option 2-3-1

[0210] Alternatively, the mobility procedure to be applied may be selected based on the priority corresponding to the mobility procedure. The priority corresponding to each mobility procedure may be defined in the specification or may be set to the UE by the base station through a higher layer parameter or the like.

[0211] For example, the UE may also perform the first mobility procedure (e.g., a cell handover procedure between L1 / L2 cells). That is, the UE may also perform the first mobility procedure in priority over the second mobility procedure. In this case, control may also be performed so that the second mobility procedure is not performed (or is canceled).

[0212] Alternatively, the UE may also execute a second mobility procedure (e.g., an L3 mobility procedure). That is, the UE may also execute the second mobility procedure in priority to the first mobility procedure. In this case, control may also be performed so that the first mobility procedure is not executed (or is canceled).

[0213] Option 2-3-2

[0214] The mobility procedures to be applied may also be selected based on the indicated (or starting) timing / sequence of the mobility procedures.

[0215] For example, a mobility process that is instructed (or started) later may be prioritized. When a second mobility instruction is received / a second mobility process is executed while a first mobility process is in progress, the UE may also control the first mobility process in progress to be canceled or stopped and the second mobility process that is instructed later may be executed (see Figure 13A ).

[0216] Alternatively, the initially instructed (or started) mobility procedure may be prioritized. If a second mobility instruction is received / the second mobility procedure is executed while the first mobility procedure is in progress, the UE may also control the ongoing first mobility procedure to continue and not execute the subsequently instructed second mobility procedure.

[0217] Option 2-3-3

[0218] The UE may also autonomously choose the mobility procedure to perform.

[0219] [Options 2-4]

[0220] When a second mobility procedure (e.g., an L3 mobility procedure) is in progress, reception of a first mobility indication (e.g., L1 / L2 cell switching indication signaling) / execution of the first mobility procedure may be allowed / supported before the L3 mobility procedure (e.g., handover / CHO / CPC) is completed.

[0221] In the case where the first mobility procedure (eg, L1 / L2 cell switching indication signaling) is received before the second mobility procedure is completed (or successful), at least one of the following options 2-4-1 to 2-4-3 may also be applied.

[0222] Option 2-4-1

[0223] Alternatively, the mobility procedure to be applied may be selected based on the priority corresponding to the mobility procedure. The priority corresponding to each mobility procedure may be defined in the specification or may be set to the UE by the base station through a higher layer parameter or the like.

[0224] For example, the UE may also perform the first mobility procedure (e.g., a cell handover procedure between L1 / L2 cells). That is, the UE may also perform the first mobility procedure in priority over the second mobility procedure. In this case, control may also be performed so that the second mobility procedure is not performed (or is canceled).

[0225] Alternatively, the UE may also execute a second mobility procedure (e.g., an L3 mobility procedure). That is, the UE may also execute the second mobility procedure in priority to the first mobility procedure. In this case, control may also be performed so that the first mobility procedure is not executed (or is canceled).

[0226] Option 2-4-2

[0227] The mobility procedures to be applied may also be selected based on the indicated (or starting) timing / sequence of the mobility procedures.

[0228] For example, the mobility process that is instructed (or started) later may be prioritized. When the first mobility instruction is received while the second mobility is in progress, the UE may also control to cancel or stop the ongoing second mobility process and execute the first mobility process that is instructed later (refer to Figure 13B ).

[0229] Alternatively, the initially indicated (or started) mobility procedure may be prioritized. When a first mobility indication is received while a second mobility procedure is in progress, the UE may also control the ongoing second mobility procedure to continue without executing the subsequently indicated first mobility procedure.

[0230] Option 2-4-3

[0231] The UE may also autonomously choose the mobility procedure to perform.

[0232] Options 2-1 to 2-4 illustrate a case where L3 mobility includes a handover procedure (e.g., an L3 handover command procedure) and a CHO / CPC procedure (e.g., an L3 CHO / CPC procedure), but the present invention is not limited thereto. The handover procedure (e.g., an L3 handover command procedure) and the CHO / CPC procedure (e.g., an L3 CHO / CPC procedure) may also be applied as separate procedures.

[0233] Regarding the interaction between the first mobility and the second mobility, different UE capabilities may also be introduced / supported according to each of the above options.

[0234] <Third embodiment>

[0235] In the third embodiment, an example of indicating / activating the TCI state associated with the additional PCI is described. In the present disclosure, the additional PCI can also be rewritten as an additional cell, a candidate cell, or a target cell.

[0236] In Rel.17 inter-cell beam management, MAC CE supports activating up to 8 TCI states, and some TCI states are associated with additional PCIs. However, it is limited to the same frequency as the serving cell (see Figure 14 ).

[0237] Figure 14 This figure shows the case where up to seven additional PCIs (or candidate cells, target cells, additional cells) are configured in the same frequency as the serving cell in Inter-Cell Beam Management (ICBM) supported in Rel. 17. The MAC CE can indicate the activation of the TCI state for the same frequency. Frequency can also be rewritten as frequency domain or frequency band.

[0238] In L1 / L2 inter-cell mobility in Rel. 18 and later, considering inter-frequency scenarios, it is envisioned that support for MAC CE activation of the TCI state associated with the additional PCI at a frequency different from that of the serving cell is also possible. For indicating / activating the TCI state in L1 / L2 inter-cell mobility, at least one of the following options 3-1 to 3-3 may be applied.

[0239] [Option 3-1]

[0240] In L1 / L2 inter-cell mobility, the TCI state activated by the MAC CE for the serving cell can also be associated with the additional PCI of the same frequency as the serving cell. The MAC CE can also be a MAC CE for dynamic beam indication.

[0241] Figure 15 An example is shown in which the TCI state activated by the MAC CE is associated with an additional PCI corresponding to the same frequency as the serving cell.

[0242] Here, it is shown that SpCell#0 is set in the first frequency (for example, f0), and the TCI state activated by MACCE for SpCell#0 is associated with SpCell#0, cell#0-1, cell#0-2, cell#0-3, and cell#0-4.

[0243] In addition, it shows that SCell#1 is set in the second frequency (for example, f1), and the TCI state activated by the MAC CE for this SCell#1 is associated with this SCell#1, cell#1-1, cell#1-2, and cell#1-3.

[0244] Cells with different frequencies have different cell configurations and frequencies. Therefore, supporting dynamic beam indication between these cells may complicate UE operation. In this case, the MAC CE can activate the TCI state of the same frequency for each serving cell.

[0245] Furthermore, L1 / L2 cell handover can be performed both intra-frequency and inter-frequency. Whether intra-frequency cell handover or inter-frequency cell handover is to be used can also be determined by the base station to the UE via higher-layer signaling. Alternatively, whether intra-frequency cell handover or inter-frequency cell handover is to be used can be determined based on UE capability information, instead of (or in addition to) higher-layer signaling.

[0246] Figure 16 An example of inter-frequency cell handover is shown. Here, when cell handover is indicated by L1 / L2 cell handover signaling, a new target cell with a different frequency than the current serving cell can also be indicated for the serving cell. In this case, the TCI state corresponding to the target cell can also be activated using a MAC CE for a different frequency.

[0247] For example, the UE may be instructed to switch from SpCell #0 to one of candidate cells #1-1 to #1-3 corresponding to a frequency different from that of the SpCell. In this case, the UE may also assume that the TCI state corresponding to the cell after the switch (e.g., candidate cell #1-1) is the TCI state activated by the MAC CE corresponding to SCell #1.

[0248] [Option 3-2]

[0249] In L1 / L2 inter-cell mobility, the TCI state activated by the MAC CE for the serving cell may be associated with at least one of an additional PCI with the same frequency as the serving cell and an additional PCI with a different frequency. The MAC CE may also be a MAC CE for dynamic beam indication.

[0250] Figure 17 An example is shown in which MAC CE activation is supported in a TCI state associated with an additional PCI corresponding to the same frequency as the serving cell, and a TCI state associated with an additional PCI corresponding to a different frequency.

[0251] exist Figure 17 , the figure shows a case where candidate cells #0-1, #0-2, and #0-3 are set in the same frequency (f0) as SpCell#0, candidate cells #1-1 and #1-2 are set in a different frequency f1, and candidate cells #2-1 and #2-2 are set in a different frequency f2. Furthermore, the figure shows a case where SpCell#0, candidate cells #0-1, #0-2, and #0-3 correspond to PCI#0, candidate cells #1-1 and #1-2 correspond to PCI#1, and candidate cells #2-1 and #2-2 correspond to PCI#2.

[0252] Here, the TCI states activated by MAC CE for SpCell#0 are associated with SpCell#0, candidate cells #0-1, #0-2, #0-3, #1-1, #1-2, #2-1, and #2-2. More specifically, the TCI state of SpCell#0 (here, TCI#0), the TCI state of candidate cell #0-1 (here, TCI#1), the TCI state of candidate cell #0-2 (here, TCI#2), the TCI state of candidate cell #0-3 (here, TCI#3), the TCI state of candidate cell #1-1 (here, TCI#4), the TCI state of candidate cell #1-2 (here, TCI#5), the TCI state of candidate cell #2-1 (here, TCI#6), and the TCI state of candidate cell #2-2 (here, TCI#7) are activated by MAC CE (e.g., the MAC CE corresponding to SpCell#0).

[0253] When multiple serving cells are configured (for example, in the case of carrier aggregation), the multiple serving cells may also share the TCI state activated by one or more MAC CEs (for example, one or more MAC CEs corresponding to different frequencies / cells) (see Figure 18 ).

[0254] exist Figure 18 , it is shown that in the first frequency domain (f0), SpCell#0, candidate cells #0-1, #0-2, and #0-3 are configured; in the second frequency domain (f1), SCell#1, candidate cells #1-1, and #1-2 are configured; and in the third frequency domain (f2), SCell#2, candidate cells #2-1 and #2-2 are configured. Furthermore, it is shown that SpCell#0, candidate cells #0-1, #0-2, and #0-3 correspond to PCI#0, SCell#1, candidate cells #1-1, and #1-2 correspond to PCI#1, and SCell#2, candidate cells #2-1 and #2-2 correspond to PCI#2.

[0255] Here, it is shown that for SpCell#0, SCell#1, and SCell#2, the TCI state activated by MAC CE is associated with SpCell#0, candidate cells #0-1, #0-2, #0-3, #1-1, #1-2, #2-1, and #2-2.

[0256] Alternatively, the TCI status of cells with different activation frequencies can be determined using a specific MAC CE. Alternatively, serving cells / candidate cells sharing a common MAC CE can be grouped. The group of cells whose TCI status is activated using a common MAC CE can be set either through higher-layer signaling or defined in the specification.

[0257] [Option 3-3]

[0258] The TCI state activated by the MAC CE for dynamic beam indication (or cell switching) can also be associated with the additional PCI of the same frequency, and the actual frequency (or PCI) applied can also follow the frequency of the source serving cell or the target cell (or cell index, reference signal resource index (for example, resource RS index)).

[0259] Figure 19 An example is shown in which the TCI state activated by the MAC CE is associated with an additional PCI corresponding to the same frequency as the serving cell.

[0260] Here, it is shown that in the first frequency (for example, f0), SpCell#0, candidate cells #0-1, #0-2, #0-3, and #0-4 are set, and for the SpCell#0 (or, f0), the TCI state activated by the MAC CE is associated with the SpCell#0, cell #0-1, cell #0-2, cell #0-3, and cell #0-4.

[0261] In the case where the activated TCI state is applied to the frequency corresponding to SCell#1, the same TCI state ID (or the same cell ID / resource RS index for each frequency) may also be applied to the frequency of SCell#1.

[0262] In this case, an association between cell indices of different frequencies may be configured / defined. The association may be implicit (e.g., implicit association) or explicit (e.g., explicit association).

[0263] As an implicit association, for example, cell index #x (e.g., cell (re-) index #x) of f0 can also be associated with cell index #x (e.g., cell (re-) index #x) of f1. As an example, candidate cell #0-2 of f0 can also be associated with candidate cell #1-2 of f1.

[0264] As an explicit association, multiple cells that apply the same TCI state at different frequencies (for example, cells at different frequencies) may be associated through higher-layer signaling.

[0265] UE capabilities related to the support of associations between cells of different frequencies can also be introduced. In addition, for the additional PCI cell scenario, UE capabilities related to whether the application of the above-mentioned TCI state is supported can also be introduced.

[0266] 《Setting Example #1》

[0267] The TCI state candidates (also called the TCI state pool) that can be set in the serving cell / candidate cell can also be cell (or CC) specific. If the TCI state pool is CC-specific, the TCI state ID for each CC / frequency can also start with a specific value (e.g., 0). In addition, resource RSs (e.g., QCL type A / D RSs) can also have a BWP / CC ID for each frequency.

[0268] For example, assume that for f0, TCI state #3 includes resources from candidate cell #0-2 (e.g., SSB #2), and for f1, TCI state #3 includes resources from candidate cell #1-1 (SSB #3) (see Figure 20 ).

[0269] exist Figure 20 , the case where SpCell#0, candidate cells #0-1, and #0-2 are configured in f0, and SCell#1, candidate cells #1-1, and #1-2 are configured in f1. Furthermore, the case where TCI state ID#3 is configured for candidate cell #0-2 (SSB#2 is transmitted) and TCI state ID#3 is configured for candidate cell #1-1 (SSB#3 is transmitted) via higher layer parameters is shown.

[0270] In this case, when the MAC CE activates at least TCI state #3, it may also mean that TCI state #3 is activated for each frequency (each TCI state pool of a different CC / frequency).

[0271] In addition, when the L1 / L2 cell switching signaling indicates candidate cell #1-1 as the target cell and indicates TCI state ID#3 as the TCI state, TCI state ID#3 of frequency f1 corresponding to the candidate cell #1-1 can also be applied.

[0272] exist Figure 20 In the example shown, it is also possible to support the same TCI state ID of each CC having different resources RS and cell ID.

[0273] Example #2

[0274] The TCI state candidates (also called the TCI state pool) that can be set in the serving cell / candidate cell can also be common to all cells (or CCs). If the TCI state pool is common to all CCs, the TCI state ID can also be set for the reference BWP / CC.

[0275] For example, consider the case where TCI state ID #3 includes resources (e.g., SSB #2) from candidate cell #0-2 for f0 (see Figure 21 ).

[0276] exist Figure 21 , it is shown that SpCell#0, candidate cells #0-1, and #0-2 are set in f0, and SCell#1, candidate cells #1-1, and #1-2 are set in f1. In addition, it is shown that TCI state ID#3 is set for candidate cell #0-2 (SSB#2 is transmitted) through high-layer parameters.

[0277] In this case, when MAC CE activates at least TCI state #3, L1 / L2 cell switching signaling indicates candidate cell #1-1 as the target cell, and indicates TCI state ID #3 as the TCI state, at least one of the following options B-1 to B-2 can also be applied.

[0278] [[Option B-1]]

[0279] The QCL resource RS ID may also be SSB#2 from candidate cell#1-1. That is, the same resource RS index from the target cell (or candidate cell) may also correspond to the CL resource RS ID.

[0280] [[Option B-2]]

[0281] The association between candidate cell #0-2 and candidate cell #1-2 can also be implicitly or explicitly set. In this case, only candidate cell #1-2 can be associated with TCI state ID #3 in f1. When L1 / L2 cell handover signaling indicates candidate cell #1-2 as the target cell and TCI state ID #3 as the TCI state, the QCL resource RS ID becomes SSB #2 from candidate cell #1-2.

[0282] In the case of associating candidate cells of different frequencies, when the TCI state ID is indicated for the target cell, the TCI state ID of the reference CC (or cell) may also have resources RS from the cell having the cell ID associated as the target cell.

[0283] <Fourth embodiment>

[0284] In the fourth embodiment, an example of setting synchronous (Sync) and asynchronous (Async) of intra-cell multi-TRP / inter-cell multi-TRP in consideration of L1 / L2 intra-cell mobility (e.g., cell switching) is described.

[0285] In Rel. 18 and later, it is envisioned that for multi-TRPs based on multi-DCI (e.g., mDCI MTRPs), the configuration of TAs per TRP will be supported. For multi-TRPs, both intra-cell and inter-cell configurations can be supported. For example, for multi-TRPs based on multi-DCI that support multiple (e.g., two) TAs, the configuration of two timing advance groups (TAGs) belonging to the serving cell is supported.

[0286] In L1 / L2 inter-cell mobility (for example, L1 / L2 inter-cell mobility), different TAGs may be set for the serving cell and the candidate cell.

[0287] In L1 / L2 inter-cell mobility, at least one of intra-cell multiple TRPs (for example, two TRPs share the same PCI) and inter-cell multiple TRPs (for example, two TRPs have different PCIs (similar to Rel.17 / 18's multi-DCI-based multi-TRPs)) can also be supported.

[0288] Figure 22An example of multiple intra-cell and inter-cell TRPs is shown. Here, multiple TRPs (here, two TRPs) are configured in SpCell#0 and SCell#2, and multiple TRPs (here, two TRPs) are configured in a candidate cell corresponding to the same frequency domain as SCell#1. Information related to serving cells and candidate cells configured with multiple TRPs can also be configured and indicated to the UE by the base station using higher-layer parameters, MAC CE, or DCI.

[0289] In the case of multiple TRPs within a cell, the two TRPs corresponding to each cell can also correspond to two TCI states associated with one PCI. In the case of multiple TRPs between cells, the two TRPs corresponding to different cells can also correspond to two TCI states associated with two PCIs.

[0290] For L1 / L2 inter-cell mobility, at least one of the following options 4-1 to 4-10 may be applied as to whether or not to support / setup intra-cell multi-TRP and inter-cell multi-TRP, and whether to set up synchronization / asynchronization.

[0291] [Option 4-1]

[0292] A serving cell (e.g., SpCell / SCell) may also support the configuration of multiple intra-cell TRPs (e.g., intra-cell MTRPs). Furthermore, for multiple intra-cell TRPs, synchronous / asynchronous (e.g., sync / async) configurations may also be supported.

[0293] When multiple TRPs in a cell are set to be synchronized, it can also mean that multiple (for example, 2) TRPs in the cell are synchronized (for example, belonging to the same TAG). When multiple TRPs in a cell are set to be asynchronous, it can also mean that multiple (for example, 2) TRPs in the cell become asynchronous (for example, belonging to different TAGs).

[0294] The setting of multiple TRPs within a cell can also be set from the base station to the UE through high-layer parameters, etc. Information related to synchronization / asynchronization between multiple TRPs within a cell (for example, belonging to the same TAG / belonging to different TAGs) can be indicated by random access response or RRC / MAC CE / DCI.

[0295] [Option 4-2]

[0296] The serving cell (e.g., SpCell / SCell) may also support the configuration of inter-cell multiple TRPs (e.g., inter-cell MTRPs). In addition, for inter-cell multiple TRPs, the configuration of synchronous / asynchronous (e.g., sync / async) may also be supported.

[0297] When synchronization is set for multiple TRPs between cells, it may also mean that multiple (e.g., two) TRPs between cells are synchronized (e.g., belong to the same TAG). When asynchronous synchronization is set for multiple TRPs between cells, it may also mean that multiple (e.g., two) TRPs between cells become asynchronous (e.g., belong to different TAGs).

[0298] The setting of multiple TRPs between cells can also be set from the base station to the UE through high-layer parameters, etc. Information related to synchronization / asynchronization between multiple TRPs between cells (for example, belonging to the same TAG / belonging to different TAGs) can be indicated by random access response or RRC / MAC CE / DCI.

[0299] Both Option 4-1 and Option 4-2 may be supported. For example, the following scenarios may be supported: in the case of multiple TRPs within a cell, two TRPs belong to the same TAG; in the case of multiple TRPs between cells, two TRPs belong to different TAGs.

[0300] [Option 4-3]

[0301] The serving cell (e.g., SpCell / SCell) may not support the configuration of multiple intra-cell TRPs (e.g., intra-cell MTRPs). In addition, the configuration of synchronous / asynchronous (e.g., sync / async) may not be supported for multiple intra-cell TRPs.

[0302] [Option 4-4]

[0303] The serving cell (e.g., SpCell / SCell) may not support the configuration of inter-cell multi-TRP (e.g., inter-cell MTRP). In addition, for inter-cell multi-TRP, the synchronization / asynchronous (e.g., sync / async) configuration may not be supported.

[0304] [Options 4-5]

[0305] Option 4-1 to Option 4-4 may also be applied in combination as appropriate. For example, a structure may be set to support both the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-1 + option 4-2). Alternatively, a structure may be set to support the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and not support the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-1 + option 4-4). Alternatively, a structure may be set to not support the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and support the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-2 + option 4-3).

[0306] [Options 4-6]

[0307] The candidate cell may also support the configuration of multiple intra-cell TRPs (e.g., intra-cell MTRPs). In addition, for multiple intra-cell TRPs, the configuration of synchronous / asynchronous (e.g., sync / async) may also be supported.

[0308] When multiple TRPs in a cell are set to be synchronized, it can also mean that multiple (for example, 2) TRPs in a candidate cell are synchronized (for example, belonging to the same TAG). When multiple TRPs in a cell are set to be asynchronous, it can also mean that multiple (for example, 2) TRPs in a candidate cell become asynchronous (for example, belonging to different TAGs).

[0309] The setting of multiple TRPs within a cell can also be set from the base station to the UE through high-layer parameters, etc. Information related to synchronization / asynchronization between multiple TRPs within a candidate cell (for example, belonging to the same TAG / belonging to different TAGs) can be indicated by either random access response or RRC / MAC CE / DCI.

[0310] [Options 4-7]

[0311] The candidate cell may also support the configuration of inter-cell multi-TRP (e.g., inter-cell MTRP). In addition, for inter-cell multi-TRP, the configuration of synchronous / asynchronous (e.g., sync / async) may also be supported.

[0312] When synchronization is set for multiple TRPs between cells, it may also mean that multiple (e.g., two) TRPs between candidate cells are synchronized (e.g., belong to the same TAG). When asynchronous synchronization is set for multiple TRPs between cells, it may also mean that multiple (e.g., two) TRPs between candidate cells become asynchronous (e.g., belong to different TAGs).

[0313] The setting of multiple TRPs between cells can also be set from the base station to the UE through high-layer parameters, etc. Information related to synchronization / asynchronization between multiple TRPs between candidate cells (for example, belonging to the same TAG / belonging to different TAGs) can be indicated by either random access response or RRC / MAC CE / DCI.

[0314] Both options 4-6 and 4-7 may also be supported. For example, the following scenarios may be supported: in the case of multiple TRPs within a cell, the two TRPs within a candidate cell belong to the same TAG; in the case of multiple TRPs between cells, the two TRPs between candidate cells belong to different TAGs.

[0315] [Options 4-8]

[0316] The candidate cell may not support the configuration of multiple intra-cell TRPs (e.g., intra-cell MTRPs). In addition, the candidate cell may not support the configuration of synchronous / asynchronous (e.g., sync / async) for multiple intra-cell TRPs.

[0317] [Options 4-9]

[0318] The candidate cell may not support the configuration of inter-cell multi-TRP (e.g., inter-cell MTRP). In addition, the candidate cell may not support the configuration of synchronous / asynchronous (e.g., sync / async) for inter-cell multi-TRP.

[0319] [Options 4-10]

[0320] Options 4-6 to 4-9 may also be appropriately combined and applied. For example, for candidate cell / cell group switching, a structure may be set to support both the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-6 + option 4-7). Alternatively, for candidate cell / cell group switching, a structure may be set to support the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and not support the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-6 + option 4-9). Alternatively, for candidate cell / cell group switching, a structure may be set to not support the setting of multiple TRPs within a cell (synchronous / asynchronous (sync / async)) and support the setting of multiple TRPs between cells (synchronous / asynchronous (sync / async)) (option 4-7 + option 4-8).

[0321] [change]

[0322] In options 4-6 to 4-10, it is also possible to distinguish whether the candidate cell is a candidate cell for SpCell switching or a candidate cell for SCell switching. In this case, the presence or absence of intra-cell multi-TRP / inter-cell multi-TRP (or synchronous / asynchronous) settings can be set separately for the candidate cell corresponding to the SpCell and the candidate cell corresponding to the SCell (or each SCell).

[0323] Alternatively, the presence or absence of intra-cell multi-TRP / inter-cell multi-TRP (or synchronous / asynchronous) settings may be commonly set for candidate cells corresponding to SpCell and candidate cells corresponding to SCell (or each SCell).

[0324] In options 4-1 to 4-10, only one of synchronization and asynchronous mode (e.g., synchronization) may be supported. For example, synchronization-related UE capabilities may be supported as basic UE capabilities, and asynchronous-related UE capabilities may be supported independently of synchronization-related UE capabilities (or on the basis of synchronization-related UE capabilities).

[0325] <Supplement>

[0326] At least one of the above-mentioned embodiments may also be applied only to UEs that report a specific UE capability or support the specific UE capability.

[0327] The specific UE capability may also represent at least one of the following:

[0328] ● Support specific UE operations in case of cell handover failure,

[0329] Support conflicts between L1 / L2 inter-cell mobility procedures / operations and L3 mobility procedures / operations,

[0330] Support intra-frequency cell handover when the TCI state activated by MAC CE is associated with the serving cell / candidate cell corresponding to the same frequency domain,

[0331] Supports inter-frequency cell handover when the TCI state activated by MAC CE is associated with the serving cell / candidate cell corresponding to the same frequency domain,

[0332] ● The TCI state activated by MAC CE is associated with the serving cell / candidate cell corresponding to different frequency domains. In this case, the maximum number of frequency domains, the maximum number of candidate cells, and the maximum number of cells per frequency are

[0333] ·For the service cell, support the setting of multiple TRPs within the cell / multiple TRPs between cells,

[0334] ·Support the setting of multiple TRPs within a cell / multiple TRPs between cells for candidate cells.

[0335] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied throughout all frequencies (commonly regardless of frequency), or capabilities for each frequency (for example, one or a combination of cells, bands, band combinations, BWPs, component carriers, etc.), or capabilities for each frequency range (for example, Frequency Range 1 (FR1)), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each feature set (FS) or feature set per component carrier (FSPC)).

[0336] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied to all duplex modes (commonly regardless of the duplex mode) or capabilities that are applied to each duplex mode (for example, time division duplex (TDD) and frequency division duplex (FDD)).

[0337] Furthermore, at least one of the above-mentioned embodiments may be applied when specific information associated with the above-mentioned embodiments is configured in the UE through higher layer signaling.

[0338] The UE may also apply the operations of Rel.15 / 16 / 17, for example, when it does not support at least one of the above-mentioned specific UE capabilities or is not set with the above-mentioned specific information.

[0339] (Note)

[0340] The following inventions are added to one embodiment of the present disclosure.

[0341] [Note 1-1]

[0342] A terminal comprises: a receiving unit for receiving downlink control information including cell switching indication information from a serving cell to a candidate cell and at least one MAC CE (MAC Control Element); and a control unit for judging the success or failure of the switching from the serving cell to the candidate cell based on at least one of the sending of an ACK (ACKnowledgement) for the cell switching indication information and the reception of a DL transmission from the candidate cell in a specific window or timer period after receiving the cell switching indication information.

[0343] [Notes 1-2]

[0344] The terminal as described in Supplement 1-1, wherein the specific window or timer starts after the ACK is sent or after a specific period of time after the ACK is sent.

[0345] [Notes 1-3]

[0346] A terminal as described in Note 1-1 or Note 1-2, wherein, when a DL transmission from the candidate cell cannot be received during the specific window or timer period / when the random access process is not completed, the control unit determines that the handover from the serving cell to the candidate cell has failed.

[0347] [Appendix 1-4]

[0348] The terminal as described in any one of Notes 1-1 to 1-3, wherein, in the case where the handover from the serving cell to the candidate cell fails, the control unit controls so that a random access process is performed on at least one of the serving cell and the candidate cell.

[0349] [Note 2-1]

[0350] A terminal comprises: a receiving unit, which receives at least one of first indication information indicating an L1 / L2 inter-cell mobility process and second indication information indicating an L3 mobility process; and a control unit, which controls the L1 / L2 inter-cell mobility process based on the first indication information and controls the L3 mobility process based on the second indication information, wherein the control unit performs control so that the L1 / L2 inter-cell mobility process and the L3 mobility process are not performed simultaneously.

[0351] [Note 2-2]

[0352] A terminal as described in Note 2-1, wherein the control unit is assumed to not receive the second indication information when the L1 / L2 inter-cell mobility process is in progress, and is assumed to not receive the first indication information when the L3 mobility process is in progress.

[0353] [Notes 2-3]

[0354] The terminal as described in Supplement 2-1 or Supplement 2-2, wherein, when the L1 / L2 inter-cell mobility procedure conflicts with the L3 mobility procedure, the control unit prioritizes a specific procedure.

[0355] [Notes 2-4]

[0356] The terminal according to any one of Supplement 2-1 to Supplement 2-3, wherein, when the L1 / L2 inter-cell mobility procedure conflicts with the L3 mobility procedure, the control unit prioritizes the procedure instructed later.

[0357] [Note 3-1]

[0358] A terminal comprises: a receiving unit, which receives a MAC CE (MAC Control Element) containing information related to an activation transmission setting indicator (TCI) status associated with a service cell and one or more candidate cells corresponding to the service cell; and a control unit, which determines the TCI status corresponding to the service cell and the TCI status corresponding to the candidate cell based on the MAC CE, and associates the TCI status activated by the MAC CE with at least the candidate cell corresponding to the same frequency domain as the service cell.

[0359] [Appendix 3-2]

[0360] The terminal as described in Note 3-1, wherein the TCI state activated by the MAC CE is associated with a candidate cell corresponding to the same frequency domain as the serving cell and a candidate cell corresponding to a frequency domain different from the serving cell.

[0361] [Note 3-3]

[0362] A terminal as described in Note 3-1 or Note 3-2, wherein, when multiple service cells are set, an activated TCI state associated with the multiple service cells and at least one activated TCI state associated with more than one candidate cell corresponding to the multiple service cells are indicated by one MAC CE.

[0363] [Notes 3-4]

[0364] A terminal as described in any one of Notes 3-1 to 3-3, wherein the control unit determines the TCI state corresponding to the service cell corresponding to other frequency domains and at least one of the candidate cells based on the TCI state ID indicated by the MACCE for the service cell corresponding to a certain frequency domain.

[0365] [Appendix 4-1]

[0366] A terminal comprises: a receiving unit, which receives downlink control information including cell switching indication information from a serving cell to a candidate cell and at least one MAC CE (MAC Control Element); and a control unit, which controls the cell switching operation based on the cell switching indication information, wherein at least one of the serving cell and the candidate cell is set with at least one of multiple intra-cell transmitting and receiving points and multiple inter-cell transmitting and receiving points.

[0367] [Note 4-2]

[0368] The terminal as described in Note 4-1, wherein, when multiple transmission and reception points are set within the cell, the multiple transmission and reception points included in at least one of the serving cell and the candidate cell are set to be synchronized or asynchronous.

[0369] [Note 4-3]

[0370] A terminal as described in Note 4-1 or Note 4-2, wherein, when multiple transmitting and receiving points between cells are set, at least one of the multiple transmitting and receiving points respectively included in multiple service cells and the multiple transmitting and receiving points respectively included in multiple candidate cells is set to be synchronous or asynchronous.

[0371] [Appendix 4-4]

[0372] A terminal as described in any one of Notes 4-1 to 4-3, wherein, in supporting the setting of both multiple transmitting and receiving points within the cell and multiple transmitting and receiving points between the cells, it supports: multiple transmitting and receiving points contained in a certain cell are set in the same timing advance group, and multiple transmitting and receiving points respectively contained in different cells are set in different timing advance groups.

[0373] (Wireless Communication System)

[0374] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0375] Figure 23 This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (also referred to simply as system 1) may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP) or the fifth-generation mobile communication system New Radio (5GNR).

[0376] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also 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 (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0377] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0378] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0379] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The configuration and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0380] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0381] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above 24 GHz (above-24 GHz)). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0382] Furthermore, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

[0383] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station (relay) can also be called an IAB node.

[0384] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0385] The core network 30 may also include, for example, user plane functions (User Plane Function (UPF)), access and mobility management function (Access and Mobility management Function (AMF)), session management function (Session Management Function (SMF)), unified data management (Unified Data Management (UDM)), application function (Application Function (AF)), data network (Data Network (DN)), location management function (Location Management Function (LMF)), maintenance and operation management (Operation, Administration and Maintenance (Management) (OAM))) and other network functions (Network Functions (NF)). In addition, multiple functions can also be provided by one network node. In addition, communication with an external network (for example, the Internet) can also be carried out via the DN.

[0386] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0387] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0388] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0389] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. can also be used as a downlink channel.

[0390] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. can also be used as an uplink channel.

[0391] The PDSCH transmits user data, higher-layer control information, and system information blocks (SIBs). The PUSCH also transmits user data, higher-layer control information, and the PBCH also transmits master information blocks (MIBs).

[0392] The PDCCH may also transmit lower layer control information. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0393] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0394] In PDCCH detection, a control resource set (CORESET) and a search space can also 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. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0395] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. Furthermore, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may also be interchangeable.

[0396] The PUCCH can also be used to transmit uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request acknowledgment (HARQ-ACK)), ACK / NACK, etc.), and scheduling request (SR). The PRACH can also be used to transmit a random access preamble used to establish a connection with a cell.

[0397] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0398] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. In the wireless communication system 1, a cell-specific reference signal (CRS)), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. can also be transmitted as DL-RS.

[0399] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for PBCHs) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0400] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0401] (Base Station)

[0402] Figure 24 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0403] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0404] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0405] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission and reception, measurement, etc., using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0406] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0407] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0408] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0409] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0410] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0411] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0412] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0413] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0414] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0415] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0416] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also 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 also be output to the control unit 110.

[0417] The transmission path interface 140 can also send and receive signals (return signaling) between the devices included in the core network 30 (for example, the network node providing NF), other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0418] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0419] The transmitting and receiving unit 120 may also send at least one of downlink control information including cell handover indication information from the serving cell to the candidate cell and a MAC CE (MAC Control Element) to the terminal. The control unit 110 may also determine the success or failure of the handover from the serving cell to the candidate cell based on an ACK (ACKnowledgement) for the cell handover indication information sent from the terminal.

[0420] The transmitting and receiving unit 120 may also transmit at least one of first indication information indicating an L1 / L2 inter-cell mobility procedure and second indication information indicating an L3 mobility procedure. The control unit 110 may also control the transmission of the first indication information and the second indication information so that the L1 / L2 inter-cell mobility procedure and the L3 mobility procedure do not conflict.

[0421] The transmitting and receiving unit 120 may also transmit a MAC CE (MAC Control Element) containing information related to the activation transmission configuration indicator (TCI) status associated with the serving cell and one or more candidate cells corresponding to the serving cell. The control unit 110 may also indicate the TCI status corresponding to the serving cell and the TCI status corresponding to the candidate cell based on the MAC CE. The TCI status activated by the MAC CE may also be associated with at least a candidate cell corresponding to the same frequency domain as the serving cell.

[0422] The transmitting / receiving unit 120 may also transmit downlink control information including cell handover indication information from the serving cell to the candidate cell and at least one of a MAC CE (MAC Control Element). The control unit 110 may also use the cell handover indication information to instruct a cell handover operation. At least one of the serving cell and the candidate cell may also be configured with at least one of multiple intra-cell transmission / reception points and multiple inter-cell transmission / reception points.

[0423] (User Terminal)

[0424] Figure 25 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0425] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0426] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0427] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0428] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0429] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0430] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0431] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0432] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0433] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0434] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0435] Furthermore, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is enabled, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as the aforementioned transmit processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transceiver unit 220 (transmit processing unit 2211) may perform DFT processing as the aforementioned transmit processing without performing DFT processing.

[0436] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0437] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0438] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0439] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0440] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0441] The transmitting and receiving unit 220 may also receive at least one of downlink control information and a MAC CE (MAC Control Element) including cell handover indication information from the serving cell to the candidate cell. The control unit 210 may also determine the success or failure of the handover from the serving cell to the candidate cell based on at least one of the transmission of an ACK (ACKnowledgement) for the cell handover indication information and the reception of a DL transmission from the candidate cell within a specific window or timer period after receiving the cell handover indication information. The specific window or timer may also start after the ACK is sent or after a specific period after the ACK is sent. If a DL transmission from the candidate cell cannot be received within the specific window or timer period / if the random access procedure is not completed, the control unit 210 may also determine that the handover from the serving cell to the candidate cell has failed. If the handover from the serving cell to the candidate cell has failed, the control unit 210 may also control the random access procedure to be performed on at least one of the serving cell and the candidate cell.

[0442] The transmitting / receiving unit 220 may also receive at least one of first indication information indicating an L1 / L2 inter-cell mobility procedure and second indication information indicating an L3 mobility procedure. The control unit 210 may also control the L1 / L2 inter-cell mobility procedure based on the first indication information and control the L3 mobility procedure based on the second indication information. The control unit 210 may also control (or assume) that the L1 / L2 inter-cell mobility procedure and the L3 mobility procedure are not performed simultaneously. The control unit 210 may also assume that the second indication information is not received when the L1 / L2 inter-cell mobility procedure is in progress. The control unit 210 may also assume that the first indication information is not received when the L3 mobility procedure is in progress. If the L1 / L2 inter-cell mobility procedure conflicts with the L3 mobility procedure, the control unit 210 may prioritize a specific procedure. If the L1 / L2 inter-cell mobility procedure conflicts with the L3 mobility procedure, the control unit 210 may prioritize the procedure that is indicated later.

[0443] The transmitting / receiving unit 220 may also receive a MAC CE (MAC Control Element) containing information related to the activated transmission configuration indicator (TCI) status associated with the serving cell and one or more candidate cells corresponding to the serving cell. The control unit 210 may also determine the TCI status corresponding to the serving cell and the TCI status corresponding to the candidate cells based on the MAC CE. The TCI status activated by the MAC CE may be associated with at least a candidate cell corresponding to the same frequency domain as the serving cell. The TCI status activated by the MAC CE may be associated with candidate cells corresponding to the same frequency domain as the serving cell and candidate cells corresponding to a different frequency domain from the serving cell. When multiple serving cells are configured, at least one of the activated TCI status associated with multiple serving cells and the activated TCI status associated with one or more candidate cells corresponding to the multiple serving cells may be indicated by a single MAC CE. The control unit 210 may also determine the TCI status corresponding to at least one of the serving cell and the candidate cell corresponding to another frequency domain based on the TCI status ID indicated by the MAC CE for the serving cell corresponding to a certain frequency domain.

[0444] The transmitting and receiving unit 220 may also receive at least one of downlink control information and a MAC CE (MAC Control Element) including cell handover indication information from the serving cell to the candidate cell. The control unit 210 may also control the cell handover operation based on the cell handover indication information. The serving cell and at least one of the candidate cells may also be configured with at least one of multiple intra-cell transmission and reception points and multiple inter-cell transmission and reception points. When multiple intra-cell transmission and reception points are configured, the multiple transmission and reception points included in at least one of the serving cell and the candidate cell may also be configured as synchronous or asynchronous. When multiple inter-cell transmission and reception points are configured, at least one of the multiple transmission and reception points respectively included in multiple serving cells and the multiple transmission and reception points respectively included in multiple candidate cells may also be configured as synchronous or asynchronous. When both the intra-cell multiple transmission and reception point and inter-cell multiple transmission and reception point configurations are supported, it is also possible to support: multiple transmission and reception points included in a cell being configured in the same timing advance group, and multiple transmission and reception points respectively included in different cells being configured in different timing advance groups.

[0445] (Hardware Structure)

[0446] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0447] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0448] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 26 This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0449] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit can be interchanged. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of the devices shown in the figure, or to exclude some of the devices.

[0450] For example, although only one processor 1001 is shown, multiple processors may be provided. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0451] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0452] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the control unit 110 (210) and the transmitting and receiving unit 120 (220) described above may also be implemented by the processor 1001.

[0453] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on them. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

[0454] The memory 1002 may also be a computer-readable recording medium, for example, comprised of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of the present disclosure.

[0455] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0456] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), and the like may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0457] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

[0458] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0459] Furthermore, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and may use such hardware to implement part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0460] (Variation)

[0461] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0462] A radio frame can also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) that constitute a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (for example, 1ms) that is independent of the parameter set (numerology).

[0463] Here, a parameter set may also refer to communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, the parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, and the like.

[0464] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0465] A time slot may also contain multiple mini-slots. Each mini-slot may also consist of one or more symbols in the time domain. Furthermore, a mini-slot may also be referred to as a sub-slot. A mini-slot may also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

[0466] Radio frames, subframes, time slots, mini-slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-slots, and symbols may also be referred to by their respective equivalents. Furthermore, the time units of frame, subframe, time slot, mini-slot, and symbol in this disclosure may be interchangeable.

[0467] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0468] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0469] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0470] In addition, when a time slot or a mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can also be controlled.

[0471] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini-slot, a subslot, a time slot, etc.

[0472] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be rewritten as TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be rewritten as TTI with a TTI length smaller than the long TTI and greater than 1ms.

[0473] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it may also include one or more consecutive subcarriers (subcarriers). The number of subcarriers included in an RB may be the same regardless of the parameter set, for example, it may be 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0474] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0475] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0476] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0477] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0478] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0479] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, the terms "cell," "carrier," and the like in this disclosure may also be rewritten as "BWP."

[0480] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0481] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0482] The names used for parameters, etc. in this disclosure are not intended to be limiting in any respect. Furthermore, the mathematical formulas, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0483] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0484] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0485] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or appended. Output information, signals, etc. may also be deleted. Input information, signals, etc. may also be sent to other devices.

[0486] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-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.

[0487] In addition, 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. In addition, 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. In addition, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0488] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0489] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparison of numerical values ​​(for example, comparison with a specific value).

[0490] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, or the like.

[0491] Furthermore, software, instructions, information, and the like may also be transmitted and received via a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and a wireless technology (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0492] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0493] 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", and "panel" can be used interchangeably.

[0494] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP))", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, small cell, femto cell, or pico cell.

[0495] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entire coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within that coverage area.

[0496] In the present disclosure, the base station sending information to the terminal and the base station instructing the terminal to perform control / action based on the information may be mutually rewritten.

[0497] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0498] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client, or several other appropriate terms.

[0499] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0500] The mobile body refers to a movable object, and the moving speed is arbitrary, and of course it also includes the case where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, cars, automatic two-wheeled vehicles (motorcycles), bicycles, connected cars, loading shovels, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, trolleys, rickshaws, ships (ships and other watercrafts), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quadcopters, balloons and objects carried on them, and is not limited to these. In addition, the mobile body can also be a mobile body that moves autonomously based on operating instructions.

[0501] The mobile object may be a vehicle (e.g., a car, an aircraft, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0502] Figure 27This figure shows an example of a vehicle according to one embodiment. Vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0503] The drive unit 41 is composed of, for example, at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is configured to include at least a steering wheel (also referred to as a handlebar), and steers at least one of the front wheels 46 and the rear wheels 47 based on user-operated steering of the steering wheel.

[0504] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals from various sensors 50-58 included in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an ECU (Electronic Control Unit).

[0505] The signals from various sensors 50-58 include a current signal from a current sensor 50 for sensing the current of the motor, a speed signal of the front wheels 46 / rear wheels 47 obtained by a speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a stepping amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a stepping amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58, and the like.

[0506] Information service unit 59 is composed of various devices such as a vehicle navigation system, audio system, speakers, display, television, and radio for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. Information service unit 59 uses information obtained from external devices via communication module 60 and the like to provide various information and services (e.g., multimedia information and multimedia services) to the occupants of vehicle 40.

[0507] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touch panel, etc.).

[0508] The driving assistance system unit 64 is composed of various devices such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning device (for example, Global Navigation Satellite System (GNSS)), map information (for example, high-precision (High Definition (HD)) map, autonomous vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS)), etc.), artificial intelligence (AI) chip, AI processor, etc., for providing functions for preventing accidents before they happen or reducing the driver's driving load, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 and realizes the driving assistance function or the autonomous driving function.

[0509] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 in the electronic control unit 49, the memory (ROM, RAM) 62, and the various sensors 50-58 included in the vehicle 40.

[0510] The communication module 60 is controlled by the microprocessor 61 of the electronic control unit 49 and is a communication device capable of communicating with external devices. For example, various information can be sent and received between external devices via wireless communication. The communication module 60 can be located either inside or outside the electronic control unit 49. The external device may be, for example, the aforementioned base station 10 or user terminal 20. Furthermore, the communication module 60 may be, for example, at least one of the aforementioned base station 10 and user terminal 20 (or may function as at least one of the base station 10 and user terminal 20).

[0511] The communication module 60 may also transmit at least one of the signals input to the electronic control unit 49 from the various sensors 50-58 described above, information obtained based on these signals, and information based on external (user) input received via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, and the like may also be referred to as input units that receive input. For example, the PUSCH transmitted via the communication module 60 may also include information based on the above input.

[0512] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices and displays it to the vehicle's information service unit 59. The information service unit 59 may also be referred to as an output unit that outputs information (for example, outputs information to a display, speaker, or other device based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0513] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. The microprocessor 61 can also control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like, included in the vehicle 40, based on the information stored in the memory 62.

[0514] In addition, the base station in the present disclosure can also be rewritten as a user terminal. For example, the various methods / implementations of the present disclosure can also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, it can also be called device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" can also be rewritten as terms corresponding to inter-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. can also be rewritten as sidelink channels.

[0515] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0516] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0517] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the methods described in this disclosure use an illustrative order to present elements of various steps, but are not limited to the specific order presented.

[0518] The various modes and embodiments described in the present disclosure may also be applied to 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 IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems based on enhancements, modifications, creations, or regulations thereof. Furthermore, multiple systems may be applied in combination (for example, LTE or LTE-A in combination with 5G, etc.).

[0519] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

[0520] Any reference to an element using the designations "first," "second," etc., as used in this disclosure, does not necessarily define the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to a first and a second element does not imply that only two elements may be used or that the first element must in some way take precedence over the second element.

[0521] The term "determining" as used in this disclosure may encompass a variety of actions. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), ascertaining, etc. as performing a "determination."

[0522] In addition, "judgment (decision)" can also be a situation where receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0523] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. can be considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where certain actions can be considered as "judgment (decision)".

[0524] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0525] The "maximum transmit power" recorded in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0526] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may also be rephrased as "accessed."

[0527] In the present disclosure, when two elements are connected, it is possible to consider them to be "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., and as several non-limiting and non-inclusive examples, they are "connected" or "combined" to each other using electromagnetic energy with a wavelength in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc.

[0528] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same manner as "different."

[0529] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0530] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0531] In the present disclosure, “below,” “less than,” “above,” “more than,” “equal to,” etc. may also be overwritten with each other. Furthermore, in the present disclosure, sentences meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “late,” “wide,” “narrow,” etc. may also be overwritten with each other without being limited to the positive, comparative, and superlative degrees. Furthermore, in the present disclosure, sentences meaning “good,” “bad,” “big,” “small,” “high,” “low,” “early,” “late,” “wide,” “narrow,” etc. may also be overwritten with each other as expressions appended with “ith” (i is an arbitrary integer) without being limited to the positive, comparative, and superlative degrees (for example, “highest” may also be overwritten with “ith highest”).

[0532] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may also be replaced with each other.

[0533] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal having: a receiving unit, receiving at least one of first indication information indicating an L1 / L2 inter-cell mobility process and second indication information indicating an L3 mobility process; and a control unit, controlling the L1 / L2 inter-cell mobility process based on the first indication information, and controlling the L3 mobility process based on the second indication information, The control unit performs control so that the L1 / L2 inter-cell mobility process and the L3 mobility process are not performed at the same time.

2. The terminal according to claim 1, wherein: The control unit assumes that the second indication information is not received when the L1 / L2 inter-cell mobility procedure is in progress, and assumes that the first indication information is not received when the L3 mobility procedure is in progress.

3. The terminal according to claim 1, wherein: The control unit prioritizes a specific process when the L1 / L2 inter-cell mobility process conflicts with the L3 mobility process.

4. The terminal according to claim 1, wherein: The control unit gives priority to the later instructed procedure when the L1 / L2 inter-cell mobility procedure conflicts with the L3 mobility procedure.

5. A wireless communication method of a terminal, comprising: A step of receiving at least one of first indication information indicating an L1 / L2 inter-cell mobility process and second indication information indicating an L3 mobility process; and a step of controlling the L1 / L2 inter-cell mobility process based on the first indication information, and controlling the L3 mobility process based on the second indication information, The control unit performs control so that the L1 / L2 inter-cell mobility process and the L3 mobility process are not performed at the same time.

6. A base station, comprising: a sending unit, sending at least one of first indication information indicating an L1 / L2 inter-cell mobility process and second indication information indicating an L3 mobility process; and A control unit controls the sending of the first indication information and the second indication information so that the L1 / L2 inter-cell mobility process and the L3 mobility process do not conflict.

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