Terminals, wireless communication methods, base stations and systems

Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives at least one of information pertaining to an additional cell corresponding to a serving cell and information pertaining to a candidate cell to which cell switching is applied by L1 / L2 signaling; and a control unit that, if a total transmission power exceeds a prescribed value when a plurality of UL transmissions are performed which include at least two of a random access channel for the additional cell, a random access channel for the candidate cell, and another UL transmission, controls power allocation for the UL transmissions on the basis of at least one of a priority order corresponding to the random access channel transmission for the additional cell, a priority order corresponding to the random access channel transmission for the candidate cell, and a priority order corresponding to the other UL transmission.

Description

Terminal, wireless communication method and base station

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

[0002] Long Term Evolution (LTE) has been specified for the Universal Mobile Telecommunications System (UMTS) network with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).

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

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

[0005] It is expected that future wireless communication systems (e.g., wireless communication systems after Rel. 17 / 5G) will support communication using multi-TRP between multiple cells including non-serving cells (e.g., additional cells), or communication using inter-cell mobility including non-serving cells (e.g., candidate cells).

[0006] However, when UL transmission to one or more additional / candidate cells is possible, how to control the UL transmission becomes an issue, since if the UL transmission to one or more additional / candidate cells is not properly controlled, the quality of communication using multiple transmission / reception points may be degraded.

[0007] The present disclosure has been made in consideration of such points, and one of its objectives is to provide a terminal, a wireless communication method, and a base station that are capable of appropriately controlling UL transmission even when UL transmission is possible to one or more additional cells / candidate cells.

[0008] A terminal according to one aspect of the present disclosure includes: a receiving unit that receives at least one of information regarding an additional cell corresponding to a serving cell and information regarding a candidate cell to which cell switching is applied by L1 / L2 signaling; and a control unit that, when a total transmission power exceeds a predetermined value when performing multiple UL transmissions including at least two of a random access channel for the additional cell, a random access channel for the candidate cell, and other UL transmissions, controls power allocation for UL transmissions based on at least one of a priority corresponding to the random access channel transmission for the additional cell, a priority corresponding to the random access channel transmission for the candidate cell, and a priority corresponding to the other UL transmissions.

[0009] According to one aspect of the present disclosure, UL transmission can be appropriately controlled even when UL transmission is possible for one or more additional cells / candidate cells.

[0010] Figure 1 shows an example of a timing advance group (TAG) to which cells included in a cell group belong. Figure 2A shows an example of intra-cell multi-TRP. Figure 2B shows an example of inter-cell multi-TRP. Figure 3A shows an example of UE movement in Rel. 17. Figure 3B shows an example of UE movement in Rel. 18 and later. Figure 4 shows an example of association between a serving cell and a candidate cell. Figure 5A shows a first example of Option 2 for candidate cell configuration. Figure 5B shows a second example of Option 2 for candidate cell configuration. Figure 6 shows PDCCH-ordered RACH with random access response (RAR) monitoring for a serving cell. Figure 7 shows PDCCH-ordered RACH without random access response (RAR) monitoring for a candidate cell. Figure 8 shows an example of inter-cell multi-TRP. Fig. 9 is a diagram showing an example of UL transmission power control according to the present embodiment. Fig. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. Fig. 11 is a diagram showing an example of a configuration of a base station according to an embodiment. Fig. 12 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 13 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. Fig. 14 is a diagram showing an example of a vehicle according to an embodiment.

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

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

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

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

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

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

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

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

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

[0020] The channel / signal to which the TCI state is applied may be called a target channel / reference signal (target channel / RS), or simply a target, and the other signal may be called a reference reference signal (reference RS), a source RS, or simply a reference.

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

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

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

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

[0025] (Timing Advance Group) The transmission timing of an uplink (UL) channel and / or an UL signal (UL channel / signal) is adjusted by a timing advance (TA). The reception timing of an UL channel / signal from a different user terminal (UE) is adjusted by a radio base station (TRP: Transmission and Reception Point, also referred to as gNB: gNodeB, etc.).

[0026] The UE may control the timing of UL transmission by applying timing advance (multiple timing advances) for each pre-configured timing advance group (TAG).

[0027] When multiple timing advances are applied, Timing Advance Groups (TAGs) classified by transmission timing are supported. The UE may control the UL transmission timing for each TAG assuming that the same TA offset (or TA value) is applied to each TAG. In other words, the TA offset may be set independently for each TAG.

[0028] When multiple timing advance is applied, the UE independently adjusts the transmission timing of cells belonging to each TAG, so that even when multiple cells are used, the radio base station can synchronize the reception timing of uplink signals from the UE.

[0029] TAGs (e.g., serving cells belonging to the same TAG) may be configured by higher layer parameters. The same timing advance value may be applied to serving cells (e.g., serving cells for which UL is configured) belonging to the same TAG. A timing advance group including the SpCell of a MAC entity may be called a Primary Timing Advance Group (PTAG), and other TAGs may be called Secondary Timing Advance Groups (STAGs). In addition, the maximum number of TAGs may be X (e.g., X=4) per cell group (e.g., MCG / SCG).

[0030] In existing systems (e.g., Rel. 16 NR), the configuration of up to four TAGs per cell group (e.g., MCG / SCG) is supported (see Figure 1). Figure 1 shows a case where three TAGs are configured for a cell group including SpCell and SCell #1 to #4. Here, the 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).

[0031] A timing advance command (TA command) may be notified to the UE using a MAC control element (e.g., MAC CE). The TA command indicates a transmission timing value of an uplink channel and is included in the MAC control element. The TA command (TAC) is signaled from the radio base station to the UE at the MAC layer. The UE controls a predetermined timer (e.g., a TA timer) based on the reception of the TA command.

[0032] (Multiple DCI-Based Multi-TRP) Rel. 18 and later support communications using multiple TRPs. In communications using multiple DCI-based multi-TRPs (e.g., M-DCI M-TRP), the UE receives DL signals / DL channels from each TRP at different timings. For example, the delay / transmission timing of DL transmissions sent to the UE from each TRP is different. In this case, if UL transmissions for each TRP are supported, the UE requires multiple timing advances (TAs) for each TRP.

[0033] Thus, in a multi-DCI based multi-TRP, it is assumed that multiple (e.g., two) timing advances (TAs) are supported for the serving cell.

[0034] The multi-DCI-based multi-TRP may be applied to at least one of intra-cell multi-TRP (e.g., intra-cell mTRP) and inter-cell multi-TRP (e.g., inter-cell mTRP) (see Figures 2A and 2B). Figure 2A shows an example of intra-cell multi-TRP, where two TRPs (e.g., TRP #1 and TRP #2) are configured in one cell. Figure 2B shows an example of inter-cell multi-TRP, where a TRP (e.g., TRP #1 in the first cell #1 and TRP #2 in the second cell #2) is configured for each cell.

[0035] When inter-cell multi-TRP is applied, an additional cell / additional PCI may be configured in addition to the serving cell. The additional cell / additional PCI may be a serving cell or a non-serving cell. The number of configured additional cells may be one or more.

[0036] In multi-DCI based multi-TRP, up to two TA offset values ​​(e.g., n-TimingAdvanceOffet values) may be supported per serving cell.

[0037] For TA acquisition corresponding to each TRP, a RACH procedure may be applied. The RACH procedure may be a RACH procedure triggered by a PDCCH order (e.g., PDCCH ordered RACH, or CFRA triggered by PDCCH order).

[0038] The timing advance group (e.g., TAG) of a UL transmission may be determined based on the TAG associated with the TCI of the UL transmission, e.g., TCIs belonging to the same CORESET pool index (or TRP) may be associated with the same TAG.

[0039] In inter-cell multi-TRP, a PDCCH order from a certain TRP (or one TRP) may trigger a RACH for the same TRP or may trigger a RACH for a different TRP.

[0040] In inter-cell multi-TRP, the PRACH setting (e.g., PRACH configuration) may be configured for each cell (e.g., non-serving cell / additional serving cell).

[0041] In inter-cell multi-TRP, a RACH may be triggered for an additional cell (e.g., a non-serving cell) to derive the TA of the additional cell. In multi-DCI based inter-cell multi-TRP operation, one additional PRACH configuration may be supported for each configured additional cell / additional PCI. The additional PRACH configuration may be used in a RACH procedure triggered by a PDCCH order for the corresponding configured additional PCI.

[0042] (L1L2-triggered mobility (LTM)) It is expected that Rel. 18 and later will support cell switching operations (e.g., L1L2-triggered mobility (LTM)) using L1 / L2 signaling (e.g., MAC CE / DCI).

[0043] When a UE performs UL transmission to one or more cells / TRPs, at least one of the following scenarios 1 and 2 may be supported. In the present disclosure, a serving cell may be interpreted as a TRP in the serving cell. Layer 1 / layer 2 (L1 / L2) and DCI / Medium Access Control Element (MAC CE) may be interpreted as interchangeable. In the present disclosure, a physical cell identity (PCI) different from the physical cell identity (PCI) of the current serving cell may be simply referred to as a "different PCI." A non-serving cell, a cell having a different PCI, and an additional cell may be interpreted as interchangeable.

[0044] <Scenario 1> Scenario 1 corresponds to, for example, multi-TRP inter-cell mobility, but is not limited to this, and may be a scenario that does not correspond to multi-TRP inter-cell mobility.

[0045] (1) The UE receives from the serving cell the SSB configuration for beam measurement of the TRP corresponding to a PCI different from that of the serving cell, and the configuration required to use radio resources for data transmission and reception (including resources of the different PCI). (2) The UE performs beam measurement of the TRP corresponding to the different PCI and reports the beam measurement results to the serving cell. (3) Based on the above report, the Transmission Configuration Indication (TCI) state associated with the TRP corresponding to the different PCI is activated by L1 / L2 signaling from the serving cell. (4) The UE transmits and receives using a UE-dedicated channel on the TRP corresponding to the different PCI. (5) The UE must always cover the serving cell, including in the case of multiple TRPs. As in conventional systems, the UE must use common channels from the serving cell, such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH).

[0046] In Scenario 1, when the UE transmits and receives signals to and from an additional cell / TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the serving cell assumption in the UE) is not changed. The UE is configured with higher layer parameters related to the PCI of non-serving cells from the serving cell. Scenario 1 may be applied, for example, in Rel. 17.

[0047] Figure 3A shows an example of UE movement in Rel. 17. Assume that the UE moves from a cell (serving cell) with PCI #1 to a cell (additional cell) with PCI #3 (which overlaps with the serving cell). In this case, Rel. 17 does not support switching of serving cells via L1 / L2.

[0048] The additional cell is a cell that has an additional PCI different from the PCI of the serving cell. The UE can receive / transmit a UE-dedicated channel (UE-dedicated CH) from the additional cell. On the other hand, the UE needs to be within the coverage of the serving cell to receive UE common channels (e.g., system information / paging / short messages). When the UE moves out of the coverage of the serving cell, a cell switch (e.g., a process such as RRC reconfiguration) is required due to handover (also called L3 mobility).

[0049] <Scenario 2> Scenario 2 applies L1 / L2 inter-cell mobility (e.g., L1L2-triggered mobility (LTM)). L1 / L2 inter-cell mobility enables the serving cell to be changed using functions such as beam control without RRC reconfiguration. In other words, transmission and reception with a candidate cell / additional cell is possible without handover. Since handover requires RRC reconnection and creates a period when data communication is unavailable, applying L1 / L2 inter-cell mobility that does not require handover makes it possible to continue data communication even when the serving cell is changed. Scenario 2 may be applied, for example, in Rel. 18 or later. In scenario 2, for example, the following procedure is performed.

[0050] (1) The UE receives configuration information (e.g., SSB configuration, etc.) for a cell with a different PCI (additional cell / candidate cell / target serving cell) from the serving cell (current serving cell) for beam measurement / serving cell change. (2) The UE performs beam measurement of the cell using the different PCI and reports the measurement results to the serving cell. (3) The UE may receive the configuration of the cell with a different PCI (serving cell / candidate cell configuration) via higher layer signaling (e.g., RRC). That is, pre-configuration for the serving cell change may be performed. This configuration may be performed together with the configuration in (1) or separately. (4) Based on the above report, the TCI state of the cell with the different PCI may be activated via L1 / L2 signaling according to the serving cell change. The activation of the TCI state and the serving cell change may be performed separately. (5) The UE changes the serving cell (assumed serving cell) and starts receiving / transmitting using the pre-configured UE-specific channel and TCI state.

[0051] That is, in Scenario 2, the serving cell (the assumed serving cell in the UE) is updated by L1 / L2 signaling. Scenario 2 may be applied in Rel. 18 and later.

[0052] 3B is a diagram showing an example of UE movement in Rel. 18. In Rel. 18 and later, the serving cell is switched by L1 / L2 (e.g., DCI / MAC CE). Here, a case is shown in which the serving cell is switched from PCI #1 corresponding to the current serving cell (e.g., current serving cell) to PCI #3 corresponding to a candidate cell (e.g., target serving cell) by L1 / L2 signaling.

[0053] The UE can receive / transmit common channels (e.g., system information / paging / short messages) / UE-dedicated channels to / from the new serving cell (target serving cell #3), which may cause the UE to move out of the coverage of the previous serving cell PCI #1.

[0054] (Configuring candidate cells in LTM) Figure 4 is a diagram showing an example of association between serving cells and candidate cells. SpCell #0, SCell #1, or SCell #2 is assumed to be a serving cell (for example, a current serving cell / a candidate cell to become the serving cell). Note that SpCell means a special cell (including a primary cell (PCell) and a primary secondary cell (PSCell)). SCell means a secondary cell.

[0055] Candidate cells (e.g., candidate cells that are not the target serving cell / current serving cell) may be associated with the SpCell / SCell. In Fig. 4, SpCell #0 is associated with candidate cells #0-1, #0-2, and #0-3. SCell #1 is associated with candidate cell #1-1. SCell #2 is associated with candidate cells #2-1 and #2-2. In this way, one or more candidate cells (e.g., candidate cells that are not the target serving cell / current serving cell) may be associated with a serving cell.

[0056] Alternatively, candidate cells may not be explicitly associated with each serving cell.

[0057] Regarding the setting of candidate cells to be candidates when changing the serving cell, for example, the following options 1 and 2 are possible.

[0058] <Option 1> As with inter-cell mobility in Rel. 17, the information in ServingCellConfig may include information about multiple candidate cells. In this case, the multiple candidate cells need to share the same PDCCH / PDSCH / UL configuration as the serving cell.

[0059] For example, in Rel. 17 inter-cell mobility, "mimoParam-r17" is added under ServingCellConfig, and PCI setting information is added. mimoParam-r17 may include additionalPCI-ToAddModList-r17, which is an information list of additional SSBs with PCIs different from the PCI of the serving cell. The same settings as the serving cell may be applied to candidate cells (additional cells, cells with additionalPCI), with the exception of some information.

[0060] <Option 2> For multiple candidate cells, a complete configuration (e.g., ServingCellConfig) corresponding to each cell may be applied. That is, the candidate cell may not share configuration information with the serving cell, and a separate configuration (e.g., separate upper layer parameters) may be applied. The UE is provided with the complete configuration of each candidate cell, so that it can communicate properly with the candidate cells.

[0061] For example, multiple candidate cells may be associated with each serving cell by reusing the carrier aggregation (CA) configuration framework. In the CA configuration framework, an SpCell may be configured for each cell group, and multiple SCells may be added. For example, a serving cell may be configured and multiple candidate cells may be configured for each cell group for L1 / L2 inter-cell mobility. Candidate cells may be activated / deactivated by MAC CE. Candidate cells may be activated / deactivated by activating / deactivating TCI information corresponding to the candidate cells by MAC CE. This method is considered to be beneficial for reducing the complexity of UE operations.

[0062] 5A is a diagram showing a first example of Option 2 for candidate cell configuration. In the example of FIG. 5A, a common candidate cell pool for cell switching in the MCG / SCG is applied to the candidate cells. In other words, the candidate cells are treated as one pool (group) regardless of frequency band.

[0063] 5B is a diagram showing a second example of the candidate cell configuration option 2. In the example of FIG. 5B, multiple cell groups are configured, and cell group switching is possible by L1 / L2 signaling. Candidate cells are configured for each cell group, and the configuration for each group includes the indices of the corresponding SpCell and SCell.

[0064] (TA Acquisition in LTM) It is also possible that the UE performs UL transmission of a candidate cell while taking into account the TA corresponding to the candidate cell. When taking into account the TA of the candidate cell, the UE needs to acquire the TA of the candidate cell (for example, TA acquisition of candidate cells).

[0065] For TA acquisition of a candidate cell, several TA acquisition methods are possible, such as TA acquisition using RACH (e.g., RACH-based solutions) and TA acquisition without using RACH (RACH-less solutions). For TA acquisition using RACH, a method with RAR monitoring and a method without RAR monitoring may be supported. The TA acquisition method may be interpreted as a TA acquisition scheme, a TA acquisition type, or a TA acquisition procedure. In the present disclosure, TA acquisition, TA measurement, TA calculation, TA computation, and TA determination may be interpreted as interchangeable terms.

[0066] For example, the UE may acquire the TA of a candidate cell by transmitting a RACH (e.g., a PDCCH ordered RACH) indicated / triggered by the PDCCH to the candidate cell. Information about the TA of the candidate cell (e.g., a TA value) may be included in a response signal (e.g., an RAR) of the RACH. The RAR may be transmitted from the serving cell or the candidate cell. Alternatively, the TA of the candidate cell may be acquired using a RACH triggered by the UE or a RACH triggered by a higher layer from the network. The PDCCH order may be triggered only by the source cell (or the serving cell).

[0067] 6 is a diagram illustrating an example of a PDCCH-ordered RACH with RAR monitoring. In the present disclosure, a source cell and a source cell group may be interchangeable. Also, a candidate cell and a candidate cell group may be interchangeable.

[0068] The source cell may transmit information regarding the configuration of the candidate cell (e.g., candidate cell configuration information) to the UE. The source cell may also transmit a PDCCH order (e.g., DCI format 1_0) used to trigger the PRACH to the UE. The PDCCH order (or DCI) may indicate a candidate cell (e.g., one candidate cell) / Random Access Occasion (RO) that is the target of the PRACH trigger / transmission. The UE transmits the PRACH in the RACH procedure to the candidate cell based on the PDCCH order to acquire the TAG / TA.

[0069] Next, the source cell transmits a response signal (RAR) to the PRACH to the UE. The RAR may include information about the TA (e.g., TA indication). The RAR (e.g., the PDSCH containing the RAR / the PDCCH scheduling the PDSCH) may be monitored in a specific search space (e.g., the common search space (CSS)) of a specific cell (e.g., the SpCell) among the current serving cells (only within the Distributed Unit (DU)). Then, the source cell performs TA adjustment (e.g., TA maintenance).

[0070] Next, the source cell may send a cell switch command to the UE. TA information may also be moved / notified from the source cell to the target cell. The UE may control UL transmission based on the acquired TA after cell switching. For example, the UE may perform the first UL transmission using the initial TA if UL synchronization with all candidate cells has not been completed after the initial cell switch.

[0071] Fig. 7 is a diagram showing an example of a PDCCH ordered RACH without RAR monitoring. Only the differences between Fig. 7 and Fig. 6 will be described.

[0072] In the example of Fig. 7, the PDCCH order used to trigger the PRACH may indicate one or more candidate cells (e.g., multiple candidate cells) / random access occasions that are targets for PRACH trigger / transmission. The UE may transmit PRACH in the RACH procedure to candidate cells based on the PDCCH order to acquire multiple TAGs / TAs. The source cell does not transmit a PRACH response signal (e.g., RAR). The source cell may indicate TA information (e.g., TA indication) to the UE using a cell switch command.

[0073] In the present disclosure, a RACH without RAR and a RACH without RAR monitoring (e.g., a RACH without RAR monitoring) may be interpreted as interchangeable. A RACH may be interpreted as a PRACH transmission triggered by a PDCCH order. A RACH procedure / PRACH transmission without RAR monitoring may be interpreted as a RACH procedure / PRACH transmission in which RAR monitoring is not required, or a RACH procedure / PRACH transmission in which RAR monitoring is not required.

[0074] In this way, in LTM, RACH may be triggered for a candidate cell (e.g., serving cell / non-serving cell) to derive the TA of the candidate cell. RACH via a PDCCH order may be applied as a method for obtaining the TA of a candidate cell in LTM. The PDCCH order may be triggered only by the source cell. An indication of the RACH occasion corresponding to the random access preamble index and the associated SSB index may be configured for each candidate cell.

[0075] (UL Transmit Power Control) In existing systems (e.g., before Rel. 17), UL transmit power control (e.g., transmission power reduction) is supported. For example, the total UE transmit power for a given UL channel / UL signal is controlled to a predetermined value (e.g., P ＣＭＡＸ ), a priority is defined for the UE to allocate power to UL transmission. The predetermined UL channel / UL signal may be, for example, PUSCH / PUCCH / PRACH / SRS, etc.

[0076] As described above, when inter-cell multi-TRP / LTM is supported, a case is assumed in which an additional cell / candidate cell is configured and UL transmission (e.g., PRACH transmission, etc.) is performed to the additional cell / candidate cell. In such a case, it is not clear how to control the power of UL transmission. For example, how to control UL transmission (e.g., UL transmission power) becomes an issue when UL transmission to the additional cell / candidate cell overlaps / collides with transmission to the additional cell / candidate cell of the serving cell or other cells. If UL transmission to the additional cell / candidate cell is not appropriately controlled, the quality of communication using multiple transmission / reception points may be degraded.

[0077] Therefore, the present inventors have studied UL transmission control in a case where UL transmission is possible to additional cells / candidate cells in addition to the serving cell, and have come up with an idea for one aspect of the present embodiment.

[0078] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0079] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0080] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be read interchangeably. In the present disclosure, terms such as support, control, controllable, operate, and operate may be read interchangeably.

[0081] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0082] 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, other messages (e.g., messages from the core network such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0083] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0084] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0085] In the present disclosure, the terms drop, abort, cancel, puncture, rate match, postpone, do not transmit, etc. may be read interchangeably.

[0086] In the present disclosure, a cell group, a serving cell group, a master cell group (MCG), and a secondary cell group (SCG) may be interchangeable. L1 / L2, L1 / L2 signaling, and DCI / MAC CE may be interchangeable. A serving cell may be replaced with a cell that transmits a PDSCH. A candidate cell may refer to a cell that is a candidate to become a serving cell through L1 / L2 inter-cell mobility.

[0087] In the present disclosure, the terms cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable. In the present disclosure, the terms cell, PCI, cell with an additional PCI, additional cell, other cell, non-serving cell, cell with a different PCI, candidate cell, candidate serving cell, cell with a PCI different from the PCI of the current serving cell, another serving cell, and target cell may be interchangeable. In the present disclosure, the terms switch, change, and update may be interchangeable. The term serving cell may be interchangeable with the serving cell before the switch or the serving cell after the switch.

[0088] L1L2-triggered mobility (LTM) and L1 / L2 inter-cell mobility may be read as interchangeable.

[0089] (Wireless Communication Method) <Prioritization for Transmit Power Reduction> Prioritization for transmit power reduction will be described. In the case of single-cell operation with two uplinks or operation with carrier aggregation, if the sum of the UE transmit powers of PUSCH, PUCCH, PRACH or SRS transmissions in the serving cell in the frequency range of each transmission opportunity i is P - CMAX (i) is predicted to exceed (where P - CMAX (i) is the P CMAX (i)), the UE allocates power to PUSCH / PUCCH / PRACH / SRS transmissions in descending order of priority as described below, so that the total UE transmit power for transmissions on the serving cell for a frequency range is equal to or less than P for that frequency range over all symbols of transmission opportunity i. - CMAX (i) It is controlled to be less than or equal to:

[0090] For the purpose of power allocation, if the UE is provided with a specific RRC parameter (uci-MuxWithDiffPrio) and the UE multiplexes HARQ-ACK information onto the PUSCH, the priority index of the PUSCH is the larger of (a) the priority index of the PUSCH and (b) the larger priority index of the HARQ-ACK information. When determining the total transmit power of the serving cell for the frequency range at the symbol of transmission opportunity i, the UE does not include the power for transmissions that begin after the symbol of transmission opportunity i. The total UE transmit power at a symbol of a slot is defined as the linear sum of the UE transmit powers of the PUSCH, PUCCH, PRACH, and SRS at the symbol of the slot.

[0091] [Priority] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index (e.g., priority index). (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell.

[0092] In case of equal priority and in operation with carrier aggregation, the UE gives power allocation priority to transmissions on the primary cell of the MCG or SCG over transmissions on the secondary cell. In case of equal priority and in operation with two UL carriers, the UE gives power allocation priority for transmissions on the carrier on which the UE is configured to transmit PUCCH. If PUCCH is not configured on either of the two UL carriers, the UE gives power allocation priority for transmissions on the non-supplementary UL carrier.

[0093] As described above, the UE determines whether the total UE transmission power is a specific value (P - CMAX If the number of users exceeds (i), power will be allocated taking into account the priority.

[0094] First Embodiment The first embodiment relates to UL transmission control taking into consideration UL transmission for multi-TRP (for example, inter-cell multi-TRP) and UL transmission of an existing system (for example, Rel. 17 or earlier).

[0095] When inter-cell multi-TRP (inter-cell M-TRP) is applied (see FIG. 8 ), the UE may receive information about an additional cell (e.g., an additional PCI) via higher layer signaling, etc. FIG. 8 shows an example of inter-cell multi-TRP. Here, a case where TRP #1 is configured in cell #1 and TRP #2 is configured in cell #2 is shown. For example, cell #1 may correspond to a serving cell (e.g., PCell or SCell), and cell #2 may be an additional cell.

[0096] When an additional cell is configured for inter-cell multi-TRP in a specific serving cell (e.g., PCell / SCell), a priority may be defined / set for UL transmission to the additional cell. In the following description, PRACH transmission is used as an example of UL transmission, but the UL transmission to which this embodiment is applicable is not limited to PRACH. A priority may be defined / set for other UL transmissions to be transmitted to the additional cell.

[0097] When multi-TRP is applied, multiple (e.g., two) CORESET pool indices may be configured by higher layer signaling, etc. The UE may be controlled to receive PDCCH / DCI in the CORESET corresponding to each CORESET pool index.

[0098] In the case where inter-cell multi-TRP (inter-cell M-TRP) is supported, the total UE transmission power is set to a specific value (e.g., P ＣＭＡＸ ), the UE may control one or more UL transmissions by allocating power based on the priority corresponding to each UL transmission.

[0099] 9 is a flowchart illustrating an example of UL transmission control (e.g., UL transmit power control). The UE controls the UL transmit power when the total UE transmit power is below a certain value (e.g., P ＣＭＡＸ ) (YES in step S11), power is allocated to multiple uplinks (UL) based on the priority order (step S12), and multiple ULs are transmitted (step S13).

[0100] Here, the prioritization for transmission power reduction may also take into account UL transmissions (e.g., PRACH transmissions) to additional cells. The prioritization may be set in specifications or may be set / instructed to the UE by higher layer signaling / physical layer signaling.

[0101] Regarding the priority of PRACH transmission for additional cells, at least one of the following options 1-1 to 1-4 may be applied.

[0102] [Option 1-1] The priority of PRACH transmission for an additional cell may be defined / applied with the same priority as that of PRACH for a specific serving cell (e.g., PCell / SCell) to which the additional cell corresponds (or is configured).

[0103] For example, when an additional cell is configured in (or for) the PCell, the same priority as that for PRACH transmission to the PCell may be defined / applied to the additional cell. When an additional cell is configured in (or for) a serving cell other than the PCell, the same priority as that for PRACH transmission to the PCell may be defined / applied to the additional cell. The serving cell other than the PCell may be an SCell.

[0104] When an additional cell is configured for a cell, it may mean that any TCI state (or activated TCI state) of the cell is associated with the additional cell.

[0105] In the present disclosure, PRACH transmission of an additional cell (e.g., PRACH transmission on an additional cell) may be read as PRACH transmission of a non-serving cell (PRACH transmission on a non-serving cell), PRACH transmission associated with an additional PCI (PRACH transmission associated with an additional RACH configuration), or PRACH transmission associated with an additional RACH configuration (PRACH transmission associated with an additional RACH configuration).

[0106] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0107] (1) PRACH transmission on the PCell, or PRACH transmission on an additional cell corresponding to the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of the priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure, without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS), PRACH transmission in a serving cell other than the PCell, or PRACH transmission on an additional cell corresponding to a serving cell other than the PCell.

[0108] The PRACH transmission on the additional cell in (1) may occur when the additional cell is configured for inter-cell multi-TRP within the PCell, or when any TCI state of the PCell (or activated TCI state of the PCell) is associated with the additional cell.

[0109] (4) PRACH transmission on the additional cell may be performed when the additional cell is configured for inter-cell multi-TRP in a serving cell other than the PCell (e.g., SCell), or when any TCI state of a serving cell other than the PCell (or an activated TCI state of a serving cell other than the PCell) is associated with the additional cell.

[0110] <<Variations>> Alternatively, the priority of PRACH transmission of an additional cell corresponding to a predetermined serving cell (PCell / SCell) may be defined / set to be lower than the priority of PRACH transmission of the predetermined serving cell.

[0111] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0112] (1) PRACH transmission on the PCell. (1.5) PRACH transmission on an additional cell corresponding to the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell. (4.5) PRACH transmission on an additional cell corresponding to a serving cell other than the PCell.

[0113] In this case, PRACH transmission of the PCell, which is the serving cell, can be prioritized over PRACH transmission of an additional cell corresponding to the PCell. Also, PRACH transmission of a serving cell other than the PCell can be prioritized over PRACH transmission of an additional cell corresponding to a serving cell other than the PCell.

[0114] In the variation, the priorities (1.5) and (4.5) shown in Option 1-1 are set, but this is not limitative. Only one of (1.5) and (4.5) may be set.

[0115] [Option 1-2] The same priority as that of a serving cell other than the PCell (e.g., SCell) may be defined / applied to PRACH transmission for the added cell. That is, the priority of PRACH transmission for the added cell may be determined regardless of the type of serving cell (PCell / SCell) to which the added cell corresponds.

[0116] For example, the same priority (e.g., the same priority as the PRACH transmission of the SCell) may be defined / applied to both the PRACH transmission of the additional cell corresponding to the PCell and the PRACH transmission of the additional cell corresponding to the SCell.

[0117] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0118] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) In the case of PUCCH or PUSCH transmission with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS), PRACH transmission in a serving cell other than the PCell, or PRACH transmission on an additional cell.

[0119] [Option 1-3] A lower priority may be defined / applied to the PRACH transmission for the additional cell than to the serving cell (e.g., a serving cell (SCell) other than the PCell). That is, regardless of the type of serving cell to which the additional cell corresponds, the priority of the PRACH transmission for the additional cell may be set lower than the priority of the PRACH transmission for a serving cell other than the PCell.

[0120] For example, the same priority (e.g., a lower priority than the PRACH transmission of a serving cell other than the PCell) may be defined / applied to both the PRACH transmission of the additional cell corresponding to the PCell and the PRACH transmission of the additional cell corresponding to the SCell.

[0121] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0122] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), or PRACH transmission in a serving cell other than the PCell. (5) PRACH transmission on additional cells.

[0123] [Option 1-4] A priority lower than that of the PCell and higher than that of a serving cell other than the PCell (e.g., an SCell) may be defined / applied to the PRACH transmission for the additional cell. That is, regardless of the type of serving cell corresponding to the additional cell, the priority of the PRACH transmission for the additional cell may be set lower than the priority of the PRACH transmission for the PCell and higher than the priority of the PRACH transmission for a serving cell other than the PCell.

[0124] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0125] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) In the case of PUCCH or PUSCH transmission with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (3.5) PRACH transmission on additional cells. (4) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell.

[0126] <<Variations>> Alternatively, different priorities may be defined / set based on the type (PCell / SCell) of the serving cell corresponding to the additional cell. For example, the priority of PRACH transmission of the additional cell corresponding to the PCell may be set higher than the priority of PRACH transmission of serving cells other than the PCell, and the priority of PRACH transmission of the additional cell corresponding to a serving cell other than the PCell may be set lower than the priority of PRACH transmission of serving cells other than the PCell.

[0127] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0128] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (3.5) PRACH transmission on an additional cell corresponding to the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell. (4.5) PRACH transmission on an additional cell corresponding to a serving cell other than the PCell.

[0129] [Variations] In the first embodiment (or at least one of options 1-1 to 1-4), the following configuration may be applied.

[0130] For different cases, different priorities (e.g. different options) may be applied. The different cases may be:

[0131] - First case: PRACH transmission on the additional cell when the additional cell is configured for inter-cell multi-TRP of a serving cell other than the PCell. In other words, PRACH transmission on the additional cell when any TCI state of a serving cell other than the PCell (or an activated TCI state of a serving cell other than the PCell) is associated with the additional cell. - Second case: PRACH transmission on the additional cell when the additional cell is configured for inter-cell multi-TRP of the PCell. In other words, PRACH transmission on the additional cell when any TCI state of the PCell (or an activated TCI state of the PCell) is associated with the additional cell. The different cases may be the following cases.

[0132] For example, case 1 may have a higher priority than case 2. Alternatively, case 2 may have a higher priority than case 1.

[0133] The options to be applied to the PRACH transmission may be determined based on the CORESET pool index. For example, PRACH transmissions associated with different CORESET pool indices (CORESET pool index = 0 or 1) may have different options applied.

[0134] The options to be applied to the PRACH transmission may be determined based on the TAG ID. For example, PRACH transmissions associated with different TAG IDs (e.g., lower TAG IDs or higher TAG IDs) may have different options applied.

[0135] The priority (or priority position) applied to PRACH transmissions may be determined based on the CORESET pool index. For example, PRACH transmissions associated with different CORESET pool indices (CORESET pool index = 0 or 1) may be applied with different priorities (or different priority positions). The priority determination based on the CORESET pool index may also be applied to other UL transmissions (e.g., PUSCH / PUCCH / SRS). For example, PUSCH / PUCCH / SRS transmissions associated with different CORESET pool indices may have different priorities.

[0136] The priority (or priority position) applied to PRACH transmissions may be determined based on the TAG ID. For example, PRACH transmissions associated with different TAG IDs (e.g., lower TAG IDs or higher TAG IDs) may be applied with different priorities (or different priority positions). The priority determination based on the TAG ID may also be applied to other UL transmissions (e.g., PUSCH / PUCCH / SRS). For example, PUSCH / PUCCH / SRS transmissions associated with different TAG IDs may have different priorities.

[0137] The association between the PRACH transmission (or other UL transmission) and the CORESET pool index may be determined based on a predetermined rule, which may be an association based on PCI / TCI status.

[0138] For example, the association between a PRACH transmission (or other UL transmission) and a PCI may be determined based on the association between the PRACH transmission and a CORESET pool index, and the association between the PCI and a CORESET pool index.

[0139] Additionally, the association between the PRACH transmission (or other UL transmission) and the PCI, the association between the PCI and the TCI state, and the association between the TCI state and the CORESET pool index may be determined.

[0140] Additionally, the association between the PRACH transmission (or other UL transmission) and the CORESET pool index may be determined based on the association between the PRACH transmission (or other UL transmission) and the TCI state, and the association between the TCI state and the CORESET pool index.

[0141] The association between the PRACH transmission (or other UL transmission) and the TAG ID may be determined based on a predetermined rule, which may be an association based on PCI / TCI status.

[0142] For example, the association between the PRACH transmission and the TAG ID may be determined based on the association between the PRACH transmission (or other UL transmission) and the PCI and the association between the PCI and the TAG ID.

[0143] Additionally, the association between the PRACH transmission and the TAG ID may be determined based on the association between the PRACH transmission (or other UL transmission) and the PCI, the association between the PCI and the TCI state, and the association between the TCI state and the TAG ID.

[0144] Additionally, the association between the PRACH transmission (or other UL transmission) and the TCI state may be determined based on the association between the PRACH transmission and the TAG ID, and the association between the TCI state and the TAG ID.

[0145] Second Embodiment The second embodiment relates to UL transmission control that takes into account UL transmission for multi-TRP (e.g., inter-cell multi-TRP) and UL transmission for L1 / L2 inter-cell mobility (e.g., L1L2-triggered mobility (LTM)). The second embodiment may be applied in combination with the first embodiment.

[0146] When inter-cell multi-TRP (inter-cell M-TRP / LTM) is supported / configured, the UE may receive information about an additional cell (e.g., additional PCI) / information about a candidate cell (e.g., candidate cell ID / candidate PCI) by higher layer signaling, etc. The additional cell and the candidate cell may be configured as a common cell, may be configured separately, or may be configured as a part of a common cell.

[0147] In the case where inter-cell M-TRP / LTM is supported, the total UE transmission power is set to a specific value (e.g., P ＣＭＡＸ ), the UE may allocate power based on the priority corresponding to each UL transmission and control to perform one or more UL transmissions (see FIG. 9).

[0148] The UE determines whether the total UE transmit power is greater than a certain value (e.g., P ＣＭＡＸ ), power is allocated to multiple uplinks (ULs) based on priority, and multiple ULs are transmitted.

[0149] Here, the prioritization for transmission power reduction may also take into account UL transmissions (e.g., PRACH transmissions) to additional cells / UL transmissions (e.g., PRACH transmissions) to candidate cells. The priorities may be set in specifications, or may be set / instructed to the UE by higher layer signaling / physical layer signaling.

[0150] Regarding the priority of PRACH transmission for additional cells / PRACH transmission for candidate cells, at least one of the following options 2-1 to 2-3 may be applied.

[0151] [Option 2-1] The priority of PRACH transmission for an additional cell (or an additional cell for inter-cell multi-TRP) may be defined / applied to be the same as the priority of PRACH transmission for a candidate cell (or a candidate cell for LTM).

[0152] In this case, the relationship between the priority of PRACH transmission for an additional cell / PRACH transmission for a candidate cell and the priority of other UL transmissions (e.g., PUSH / PUCCH / SRS) may be such that at least one of options 1-1 to 1-4 of the first embodiment is applied.

[0153] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0154] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) In the case of PUCCH or PUSCH transmission with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS), PRACH transmission in a serving cell other than the PCell, PRACH transmission on an additional cell, or PRACH transmission on a candidate cell.

[0155] Alternatively, as another example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0156] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), or PRACH transmission in a serving cell other than the PCell. (5) PRACH transmission on an additional cell or PRACH transmission on a candidate cell.

[0157] Note that the priority of PRACH transmission to an added cell / PRACH transmission to a candidate cell is not limited to this, and may be set to any of the priorities (1) to (4).

[0158] [Option 2-2] The priority of PRACH transmission for an additional cell (or an additional cell for inter-cell multi-TRP) may be defined / applied to be higher than the priority of PRACH transmission for a candidate cell (or a candidate cell for LTM).

[0159] In this case, the relationship between the priority of PRACH transmission for the additional cell, the priority of PRACH transmission for the candidate cell, and the priority of other UL transmissions (e.g., PUSH / PUCCH / SRS) may be such that at least one of options 1-1 to 1-4 of the first embodiment is applied.

[0160] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0161] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), or PRACH transmission in a serving cell other than the PCell. (5) PRACH transmission on the additional cell. (6) PRACH transmission on the candidate cell.

[0162] Alternatively, as another example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0163] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) PRACH transmission on an additional cell. (5) PRACH transmission on a candidate cell. (6) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell.

[0164] Alternatively, as another example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0165] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) In the case of PUCCH or PUSCH transmission with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), PRACH transmission in a serving cell other than the PCell, or PRACH transmission on an additional cell. (5) PRACH transmission on a candidate cell.

[0166] Note that the priority of PRACH transmission for the added cell / PRACH transmission for the candidate cell is not limited to this. It may be set between any of the priorities (1) to (3). Also, although the case where the priority of PRACH transmission for the added cell and the priority of PRACH transmission for the candidate cell are consecutive has been shown, the present invention is not limited to this.

[0167] [Option 2-3] The priority of PRACH transmission for an additional cell (or an additional cell for inter-cell multi-TRP) may be defined / applied to be lower than the priority of PRACH transmission for a candidate cell (or a candidate cell for LTM).

[0168] In this case, the relationship between the priority of PRACH transmission for the additional cell, the priority of PRACH transmission for the candidate cell, and the priority of other UL transmissions (e.g., PUSH / PUCCH / SRS) may be such that at least one of options 1-1 to 1-4 of the first embodiment is applied.

[0169] As an example of priorities applied to power control of UL transmissions, the following priorities may be defined / applied:

[0170] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), or PRACH transmission in a serving cell other than the PCell. (5) PRACH transmission on the candidate cell. (6) PRACH transmission on the additional cell.

[0171] Alternatively, as another example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0172] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) PRACH transmission on a candidate cell. (5) PRACH transmission on an additional cell. (6) SRS transmission (semi-persistent SRS / non-periodic SRS transmission with higher priority than periodic SRS) or PRACH transmission in a serving cell other than the PCell.

[0173] Alternatively, as another example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0174] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a larger priority index. (3) In the case of PUCCH or PUSCH transmission with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) SRS transmission (semi-persistent SRS / aperiodic SRS transmission with higher priority than periodic SRS), PRACH transmission in a serving cell other than the PCell, or PRACH transmission on a candidate cell. (5) PRACH transmission on an additional cell.

[0175] Note that the priority of PRACH transmission for the added cell / PRACH transmission for the candidate cell is not limited to this. It may be set between any of the priorities (1) to (3). Also, although the case where the priority of PRACH transmission for the added cell and the priority of PRACH transmission for the candidate cell are consecutive has been shown, the present invention is not limited to this.

[0176] [Variations] In the second embodiment (or at least one of options 2-1 to 2-3), the following configuration may be applied.

[0177] For different cases, different priorities (e.g. different options) may be applied. The different cases may be:

[0178] - First case: PRACH transmission on the additional cell when the additional cell is configured for inter-cell multi-TRP of a serving cell other than the PCell. In other words, PRACH transmission on the additional cell when any TCI state of a serving cell other than the PCell (or an activated TCI state of a serving cell other than the PCell) is associated with the additional cell. - Second case: PRACH transmission on the additional cell when the additional cell is configured for inter-cell multi-TRP of the PCell. In other words, PRACH transmission on the additional cell when any TCI state of the PCell (or an activated TCI state of the PCell) is associated with the additional cell. The different cases may be the following cases.

[0179] For example, case 1 may have a higher priority than case 2. Alternatively, case 2 may have a higher priority than case 1.

[0180] The options to be applied to the PRACH transmission may be determined based on the CORESET pool index. For example, PRACH transmissions associated with different CORESET pool indices (CORESET pool index = 0 or 1) may have different options applied.

[0181] The options to be applied to the PRACH transmission may be determined based on the TAG ID. For example, PRACH transmissions associated with different TAG IDs (e.g., lower TAG IDs or higher TAG IDs) may have different options applied.

[0182] The priority (or priority position) applied to PRACH transmissions may be determined based on the CORESET pool index. For example, PRACH transmissions associated with different CORESET pool indices (CORESET pool index = 0 or 1) may be applied with different priorities (or different priority positions). The priority determination based on the CORESET pool index may also be applied to other UL transmissions (e.g., PUSCH / PUCCH / SRS). For example, PUSCH / PUCCH / SRS transmissions associated with different CORESET pool indices may have different priorities.

[0183] The priority (or priority position) applied to PRACH transmissions may be determined based on the TAG ID. For example, PRACH transmissions associated with different TAG IDs (e.g., lower TAG IDs or higher TAG IDs) may be applied with different priorities (or different priority positions). The priority determination based on the TAG ID may also be applied to other UL transmissions (e.g., PUSCH / PUCCH / SRS). For example, PUSCH / PUCCH / SRS transmissions associated with different TAG IDs may have different priorities.

[0184] The association between the PRACH transmission (or other UL transmission) and the CORESET pool index may be determined based on a predetermined rule, which may be an association based on PCI / TCI status.

[0185] For example, the association between a PRACH transmission (or other UL transmission) and a PCI may be determined based on the association between the PRACH transmission and a CORESET pool index, and the association between the PCI and a CORESET pool index.

[0186] Additionally, the association between the PRACH transmission (or other UL transmission) and the PCI, the association between the PCI and the TCI state, and the association between the TCI state and the CORESET pool index may be determined.

[0187] Additionally, the association between the PRACH transmission (or other UL transmission) and the CORESET pool index may be determined based on the association between the PRACH transmission (or other UL transmission) and the TCI state, and the association between the TCI state and the CORESET pool index.

[0188] The association between the PRACH transmission (or other UL transmission) and the TAG ID may be determined based on a predetermined rule, which may be an association based on PCI / TCI status.

[0189] For example, the association between the PRACH transmission and the TAG ID may be determined based on the association between the PRACH transmission (or other UL transmission) and the PCI and the association between the PCI and the TAG ID.

[0190] Additionally, the association between the PRACH transmission and the TAG ID may be determined based on the association between the PRACH transmission (or other UL transmission) and the PCI, the association between the PCI and the TCI state, and the association between the TCI state and the TAG ID.

[0191] Additionally, the association between the PRACH transmission (or other UL transmission) and the TCI state may be determined based on the association between the PRACH transmission and the TAG ID, and the association between the TCI state and the TAG ID.

[0192] <Third Embodiment> The third embodiment relates to UL transmission control taking into consideration UL transmission for multi-TRP (e.g., inter-cell multi-TRP) and UL transmission for L1 / L2 inter-cell mobility (e.g., L1L2-triggered mobility (LTM)). The third embodiment may be applied in combination with the first embodiment / second embodiment.

[0193] The priority of UL transmissions other than the PRACH transmissions shown in the first and second embodiments (for example, PUSCH / PUCCH / SRS) may be changed. For example, the priority of an SRS may be set differently depending on the transmission type of the SRS (periodic / semi-persistent / aperiodic).

[0194] As an example, the priority of aperiodic SRS transmission (e.g., aperiodic SRS) may be set to be higher than the priority of semi-persistent SRS (e.g., semi-persistent SRS) / periodic SRS transmission.

[0195] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a large priority index (e.g., priority index). (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) Aperiodic SRS transmission, or PRACH transmission in a serving cell other than the PCell. (5) Semi-persistent / periodic SRS transmission.

[0196] In the case where the priority of SRS transmission is determined according to the transmission type of SRS, the priority of PRACH transmission for an additional cell / PRACH transmission for a candidate cell may also be taken into consideration.

[0197] For example, the priority of PRACH transmission for an additional cell / PRACH transmission for a candidate cell may be set to be lower than the priority of semi-persistent SRS / periodic SRS transmission. As an example of the priority applied to the power control of UL transmission, the following priority may be defined / applied:

[0198] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a large priority index (e.g., priority index). (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) Aperiodic SRS transmission, or PRACH transmission in a serving cell other than the PCell. (5) Semi-persistent / periodic SRS transmission. (6) PRACH transmission on an additional cell or PRACH transmission on a candidate cell.

[0199] For example, the priority of PRACH transmission for an additional cell / PRACH transmission for a candidate cell may be set to be lower than aperiodic SRS transmission or PRACH transmission on a serving cell other than the PCell, and higher than the priority of semi-persistent SRS / periodic SRS transmission. As an example of the priority applied to power control of UL transmission, the following priority may be defined / applied:

[0200] (1) PRACH transmission on the PCell. (2) PUCCH or PUSCH transmission with a large priority index (e.g., priority index). (3) For PUCCH or PUSCH transmissions with the same priority index, the order of priority is (3-1) to (3-3). (3-1) PUCCH transmission with HARQ-ACK information / SR / LRR, or PUSCH transmission with HARQ-ACK information of a priority index. (3-2) PUCCH transmission with CSI or PUSCH transmission with CSI. (3-3) PUSCH transmission for Type-2 random access procedure without a priority index or HARQ-ACK information of CSI, or PUSCH transmission on the PCell. (4) Aperiodic SRS transmission, or PRACH transmission in a serving cell other than the PCell. (4.5) PRACH transmission on additional cells or PRACH transmission on candidate cells. (5) Semi-persistent / periodic SRS transmission.

[0201] Here, we have shown a case where the priority of PRACH transmission on the added cell and the priority of PRACH transmission on the candidate cell are the same, but this is not limited to this, and the priority of PRACH transmission on the added cell and the priority of PRACH transmission on the candidate cell may be set differently.

[0202] <Supplementary Information> [Notification of Information to UE] In the above-described embodiments, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, reception of any information from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0203] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader, which is not defined in existing standards.

[0204] When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0205] Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently, or aperiodically.

[0206] [Notification of Information from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0207] When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader.

[0208] If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH.

[0209] Furthermore, any information in the above-described embodiments may be notified from the UE periodically, semi-persistently, or aperiodically.

[0210] [Application of Each Embodiment] At least one of the above-described embodiments may be applied when a specific condition is met. The specific condition may be defined in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling.

[0211] At least one of the above-described embodiments may be applied only to UEs that have reported or support a specific UE capability. Note that "supporting" and "whether to support" may be interpreted as interchangeable.

[0212] The specific UE capabilities may indicate at least one of the following: - Supporting specific processing / operations / control / information for at least one of the above embodiments / options; - Supporting inter-cell multi-TRP; - Supporting L1 / L2 inter-cell mobility (e.g., L1L2-triggered mobility (LTM)); - Supporting PRACH transmission to additional / candidate cells.

[0213] Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, a band, a band combination, a BWP, a component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0214] Furthermore, the specific UE capability may be a capability that is applied to all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0215] Furthermore, at least one of the above-described embodiments may be applied when the UE configures / activates / triggers specific information related to the above-described embodiment (or performs the operations of the above-described embodiment) through higher layer signaling / physical layer signaling. For example, the specific information may be any RRC parameter for a specific release (e.g., Rel. 18 / 19), etc.

[0216] If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may apply, for example, the behavior of Rel. 15 / 16 / 17.

[0217] (Supplementary Notes) The following inventions are supplemented with respect to one embodiment of the present disclosure. [Supplementary Note 1-1] A terminal having: a receiving unit that receives information about an added cell corresponding to a serving cell; and a control unit that controls, when a total transmission power exceeds a predetermined value when performing a plurality of UL transmissions including a random access channel for the added cell and other UL transmissions, power allocation for UL transmissions based on a priority corresponding to the random access channel transmission for the added cell and a priority corresponding to the other UL transmissions. [Supplementary Note 1-2] The terminal according to Supplementary Note 1-1, in which a different priority is set for the random access channel transmission for the added cell depending on the type of serving cell to which the added cell corresponds. [Supplementary Note 1-3] The terminal according to Supplementary Note 1-1 or Supplementary Note 1-2, in which the same priority is set for the random access channel transmission for the added cell regardless of the type of serving cell to which the added cell corresponds. [Supplementary Note 1-4] The terminal according to any of Supplements 1-1 to 1-3, in which a priority corresponding to the random access channel transmission for the added cell is set lower than a priority corresponding to the random access channel transmission for the serving cell.

[0218] [Supplementary Note 2-1] A terminal having: a receiving unit that receives at least one of information on an added cell corresponding to a serving cell and information on a candidate cell to which cell switching is applied by L1 / L2 signaling; and a control unit that controls UL transmission power allocation based on at least one of a priority corresponding to the random access channel transmission for the added cell, a priority corresponding to the random access channel transmission for the candidate cell, and a priority corresponding to the other UL transmission when a total of transmission power exceeds a predetermined value when performing a plurality of UL transmissions including at least two of a random access channel for the added cell, a random access channel for the candidate cell, and other UL transmissions. [Supplementary Note 2-2] The terminal according to Supplementary Note 2-1, in which the priority corresponding to the random access channel transmission for the added cell is the same as the priority corresponding to the random access channel transmission for the candidate cell. [Supplementary Note 2-3] The terminal according to Supplementary Note 2-1 or Supplementary Note 2-2, in which the priority corresponding to the random access channel transmission for the added cell is higher than the priority corresponding to the random access channel transmission for the candidate cell. [Supplementary Note 2-4] The terminal according to any one of Supplementary Note 2-1 to Supplementary Note 2-3, wherein a priority corresponding to random access channel transmission to the additional cell is lower than a priority corresponding to random access channel transmission to the candidate cell.

[0219] (Wireless Communication System) The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination thereof.

[0220] 10 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may be simply referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0221] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0222] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0223] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0224] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are located within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A user terminal 20 may be located within at least one of the cells. The locations and numbers of the cells and user terminals 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.

[0225] 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).

[0226] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.

[0227] 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.

[0228] The multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with the Common Public Radio Interface (CPRI), an X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0229] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0230] The core network 30 may include network functions (Network Functions (NF)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). A single network node may provide multiple functions. Communication with an external network (e.g., the Internet) may also be performed via the DN.

[0231] The user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0232] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the wireless communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0233] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0234] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0235] Furthermore, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), or the like may be used as an uplink channel.

[0236] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0237] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information for at least one of the PDSCH and the PUSCH.

[0238] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as a UL grant, a UL DCI, etc. Note that the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

[0239] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources for searching for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

[0240] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that the terms "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," "CORESET configuration," and the like in the present disclosure may be read interchangeably.

[0241] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0242] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0243] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0244] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as a reference signal.

[0245] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may also be called a user equipment-specific reference signal (UE-specific reference signal).

[0246] 11 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0247] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0248] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0249] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0250] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0251] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, the RF unit 122, and a measurement unit 123.

[0252] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0253] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0254] The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0255] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0256] The transmitter / receiver unit 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0257] The transceiver unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.

[0258] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.

[0259] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0260] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0261] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes that provide NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0262] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0263] The transceiver 120 may transmit information about the additional cell corresponding to the serving cell to the terminal. When a plurality of UL transmissions, including a random access channel for the additional cell and other UL transmissions, are performed in the terminal and the total transmission power exceeds a predetermined value, the controller 110 may determine that UL transmission power allocation is to be applied based on a priority corresponding to the random access channel transmission for the additional cell and a priority corresponding to the other UL transmissions.

[0264] The transceiver 120 may transmit at least one of information about an additional cell corresponding to the serving cell and information about a candidate cell to which cell switching is applied by L1 / L2 signaling to the terminal. When a plurality of UL transmissions including at least two of a random access channel for the additional cell, a random access channel for the candidate cell, and other UL transmissions are performed in the terminal and the total transmission power exceeds a predetermined value, the control unit 110 may determine that UL transmission power allocation is applied based on at least one of a priority corresponding to the random access channel transmission for the additional cell, a priority corresponding to the random access channel transmission for the candidate cell, and a priority corresponding to the other UL transmissions.

[0265] (User Terminal) Fig. 12 is a diagram showing an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0266] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0267] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which are described based on common understanding in the technical field to which the present disclosure relates.

[0268] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transceiver unit 220.

[0269] The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0270] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0271] The transmitting / receiving antenna 230 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure relates, such as an array antenna.

[0272] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0273] The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0274] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0275] The transmitter / receiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0276] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and if not, it may not be necessary to perform DFT processing as the transmission processing.

[0277] The transceiver unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.

[0278] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.

[0279] The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0280] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0281] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0282] The transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.

[0283] The transceiver 220 may receive information about an additional cell corresponding to the serving cell. When a total transmission power of multiple UL transmissions including a random access channel for the additional cell and other UL transmissions exceeds a predetermined value, the controller 210 may control power allocation for the UL transmission based on a priority corresponding to the random access channel transmission for the additional cell and a priority corresponding to the other UL transmissions.

[0284] As a priority for random access channel transmission to the added cell, a different priority may be set for each type of serving cell to which the added cell corresponds. As a priority for random access channel transmission to the added cell, the same priority may be set regardless of the type of serving cell to which the added cell corresponds. The priority for random access channel transmission to the added cell may be set lower than the priority for random access channel transmission to the serving cell.

[0285] The transceiver 220 may receive at least one of information about an additional cell corresponding to the serving cell and information about a candidate cell to which cell switching is applied by L1 / L2 signaling. When a total of transmission powers of multiple UL transmissions including at least two of a random access channel for the additional cell, a random access channel for the candidate cell, and other UL transmissions exceeds a predetermined value, the control unit 210 may control power allocation of the UL transmissions based on at least one of a priority corresponding to the random access channel transmission for the additional cell, a priority corresponding to the random access channel transmission for the candidate cell, and a priority corresponding to the other UL transmissions.

[0286] The priority corresponding to the random access channel transmission to the additional cell may be the same as the priority corresponding to the random access channel transmission to the candidate cell. The priority corresponding to the random access channel transmission to the additional cell may be set higher than the priority corresponding to the random access channel transmission to the candidate cell. The priority corresponding to the random access channel transmission to the additional cell may be set lower than the priority corresponding to the random access channel transmission to the candidate cell.

[0287] (Hardware Configuration) Note that the block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining software with the single device or the multiple devices.

[0288] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs transmission may be called a transmitting unit, transmitter, etc. As described above, the implementation method of each is not particularly limited.

[0289] For example, a base station, a user terminal, or the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 13 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0290] In the present disclosure, the terms apparatus, circuit, device, section, unit, etc. may be used interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0291] For example, although only one processor 1001 is shown, there may be multiple processors. Furthermore, processing may be performed by one processor, or processing may be performed by two or more processors simultaneously, serially, or in other ways. Furthermore, processor 1001 may be implemented by one or more chips.

[0292] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading specified software (programs) onto hardware such as a processor 1001 and a memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control at least one of reading and writing data in the memory 1002 and the storage 1003.

[0293] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.

[0294] The processor 1001 also reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be implemented in a similar manner.

[0295] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EEPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory, etc. The memory 1002 may store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.

[0296] Storage 1003 is a computer-readable recording medium and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0297] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, or a communication module. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0298] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0299] Furthermore, each device, such as the processor 1001 and the memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0300] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0301] (Modifications) Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applicable standard. A component carrier (CC) may also be called a cell, frequency carrier, carrier frequency, etc.

[0302] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0303] Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel, and may indicate at least one of, for example, Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering performed by a transceiver in the frequency domain, and specific windowing performed by a transceiver in the time domain.

[0304] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology.

[0305] A slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0306] A radio frame, a subframe, a slot, a minislot, and a symbol all represent time units for transmitting signals. The radio frame, the subframe, the slot, the minislot, and the symbol may be referred to by other names corresponding to the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be interchangeable.

[0307] For example, one subframe may be referred to as a TTI, or multiple consecutive subframes may be referred to as a TTI, or one slot or one minislot may be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

[0308] Here, TTI refers to, for example, the smallest time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0309] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0310] When one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit for scheduling. Also, the number of slots (minislots) constituting the minimum time unit for scheduling may be controlled.

[0311] A TTI having a time length of 1 ms may be called a regular TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, regular subframe, normal subframe, long subframe, slot, etc. A TTI shorter than a regular TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.

[0312] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and greater than or equal to 1 ms.

[0313] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of numerology, for example, 12. The number of subcarriers included in an RB may be determined based on numerology.

[0314] In addition, an RB may include one or more symbols in the time domain and may have a length of one slot, one minislot, one subframe, or one TTI, each of which may be composed of one or more resource blocks.

[0315] In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0316] 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.

[0317] A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by their index relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0318] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0319] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be read as "BWP."

[0320] The above-described structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways.

[0321] Furthermore, the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values ​​from a predetermined value, or may be expressed using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0322] The names used for parameters and the like in this disclosure are not intended to be limiting in any way. Furthermore, the mathematical expressions and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.

[0323] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0324] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes.

[0325] Input and output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0326] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0327] Note that the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. Furthermore, the RRC signaling may be referred to as an RRC message, such as an RRC Connection Setup message or an RRC Connection Reconfiguration message. Furthermore, the MAC signaling may be notified using, for example, a MAC Control Element (CE).

[0328] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0329] The determination may be made by a value represented by one bit (0 or 1), by a Boolean value represented by true or false, or by a comparison of numerical values ​​(e.g., comparison with a predetermined value).

[0330] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0331] Software, instructions, information, etc. may also be transmitted or received over a transmission medium. For example, if software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave), these wired and / or wireless technologies are included within the definition of transmission media.

[0332] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0333] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0334] In the present disclosure, the term "antenna port" may be interchangeably read as an antenna port for any signal / channel (e.g., a demodulation reference signal (DMRS) port). In the present disclosure, the term "resource" may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource, an SRS resource, etc.). The resource may include time / frequency / code / space / power resources. Furthermore, the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0335] The group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0336] In addition, in the present disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.

[0337] In addition, in the present disclosure, the terms TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0338] Furthermore, in the present disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL property / properties," "specific QCL type (e.g., Type A, Type D) property," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0339] In the present disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interchangeable. In the present disclosure, terms such as sequence, list, set, group, cluster, and subset may be interchangeable.

[0340] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be interchangeable. The "spatial relationship information (TCI state)" may be interchangeable with "set of spatial relationship information (TCI state)", "one or more pieces of spatial relationship information", etc. The TCI state and the TCI may be interchangeable. The spatial relationship information and the spatial relationship may be interchangeable.

[0341] In the present disclosure, terms such as "base station (BS)," "radio base station," "fixed station," "NodeB," "eNB (eNodeB)," "gNB (gNodeB)," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "cell," "sector," "cell group," "carrier," "component carrier," etc. may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.

[0342] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can be provided with communication service by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to part or all of the coverage area of ​​a base station and / or base station subsystem that provides communication service within that coverage.

[0343] In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information.

[0344] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0345] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0346] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.

[0347] The mobile body is a movable object that can move at any speed and naturally includes cases where the mobile body is stationary. Examples of the mobile body include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted thereon. The mobile body may also be a mobile body that moves autonomously based on an operation command.

[0348] The mobile object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Note that at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0349] 14 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0350] The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0351] The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0352] The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46 / rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal of the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.

[0353] The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, speakers, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from external devices via the communication module 60 or the like to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0354] The information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.

[0355] The driving assistance system unit 64 includes various devices for providing functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Units (IMUs), Inertial Navigation Systems (INSs)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.

[0356] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 to and from the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, which are provided in the vehicle 40.

[0357] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Furthermore, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 described above (or may function as at least one of the base station 10 and the user terminal 20).

[0358] The communication module 60 may transmit at least one of signals from the above-mentioned various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above-mentioned input.

[0359] The communication module 60 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0360] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40.

[0361] Furthermore, a base station in the present disclosure may be read as a user terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, terms such as an uplink channel and a downlink channel may be read as a sidelink channel.

[0362] Similarly, the user terminal in the present disclosure may be read as a base station, in which case the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0363] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node in some cases. It is apparent that in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc.), or a combination thereof.

[0364] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0365] Each aspect / embodiment described in the present disclosure may be a technology other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or decimal number)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (Wi-Fi (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (Wi-Fi (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802. The present invention may be applied to systems that use IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. Furthermore, the present invention may be applied to a combination of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0366] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0367] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.

[0368] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, etc.

[0369] Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0370] Furthermore, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. In other words, "determination" may be considered to be "determining" some kind of action. In the present disclosure, "determination" may be read interchangeably with the above-mentioned actions.

[0371] Furthermore, in this disclosure, "determine / determining" may be interchangeably read as "assume / assuming," "expect / expecting," "consider / considering," etc. Furthermore, in this disclosure, "does not expect to do..." may be interchangeably read as "assumes not to do...."

[0372] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...." "does not expect ..." may be interchangeably read as "be not expected ...." Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (e.g., if apparatus A is a UE, apparatus B may be a base station).

[0373] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0374] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0375] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, etc., as some non-limiting and non-exhaustive examples.

[0376] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0377] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Furthermore, when the term "or" is used in this disclosure, it is not intended to be an exclusive or.

[0378] In this disclosure, where articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0379] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with "i-th" (i is an arbitrary integer) attached (for example, "highest" may be interchangeable with "i-th highest").

[0380] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0381] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be approximately zero (immediately after or immediately before). A time offset may also be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after a time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0382] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0383] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The description of the present disclosure is for illustrative purposes only and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. A receiving unit that receives information about additional cells corresponding to a serving cell, and information about candidate cells for mobility that are triggered by at least one of the following: downlink control information (DCI) and Medium Access Control Control Element (MAC CE), The system includes a control unit that controls the power allocation of multiple uplink (UL) transmissions, including physical random access channel (PRACH) transmissions to the additional cell corresponding to the serving cell and PRACH transmissions to the candidate cell, based on the priority of PRACH transmissions to the additional cell and the priority of PRACH transmissions to the candidate cell, when the total transmit power of multiple uplink (UL) transmissions exceeds a predetermined value. A terminal that has a higher priority for PRACH transmission to the candidate cell than for PRACH transmission to the additional cell.

2. The steps include receiving information about additional cells corresponding to a serving cell, and information about candidate cells for mobility triggered by at least one of the following: downlink control information (DCI) and Medium Access Control Control Element (MAC CE), The method includes the step of controlling the power allocation of a plurality of uplink (UL) transmissions, including a physical random access channel (PRACH) transmission to the additional cell corresponding to the serving cell and a PRACH transmission to the candidate cell, if the total transmit power of the plurality of UL transmissions exceeds a predetermined value, based on the priority of the PRACH transmission to the additional cell and the priority of the PRACH transmission to the candidate cell. A wireless communication method for a terminal in which the priority of PRACH transmission to the candidate cell is higher than that of PRACH transmission to the additional cell.

3. A transmitting unit that transmits to a terminal information regarding additional cells corresponding to a serving cell, and information regarding candidate cells for mobility that are triggered by at least one of the following: downlink control information (DCI) and Medium Access Control Control Element (MAC CE), The terminal has a control unit that determines, when the total transmission power of a plurality of uplink (UL) transmissions, including a physical random access channel (PRACH) transmission to the additional cell corresponding to the serving cell and a PRACH transmission to the candidate cell, exceeds a predetermined value, that the terminal applies a power allocation for the plurality of UL transmissions based on the priority of the PRACH transmission to the additional cell and the priority of the PRACH transmission to the candidate cell. A base station that has a higher priority for PRACH transmission to the candidate cell than for PRACH transmission to the additional cell.

4. A system having a terminal and a base station, The aforementioned terminal is A receiving unit that receives information about additional cells corresponding to a serving cell, and information about candidate cells for mobility that are triggered by at least one of the following: downlink control information (DCI) and Medium Access Control Control Element (MAC CE), The system includes a control unit that controls the power allocation of multiple uplink (UL) transmissions, including physical random access channel (PRACH) transmissions to the additional cell corresponding to the serving cell and PRACH transmissions to the candidate cell, based on the priority of PRACH transmissions to the additional cell and the priority of PRACH transmissions to the candidate cell, when the total transmit power of multiple uplink (UL) transmissions exceeds a predetermined value. The aforementioned base station is It has a transmission unit that transmits information about the additional cell and information about the candidate cell, A system in which the priority of PRACH transmission to the candidate cell is higher than that of PRACH transmission to the additional cell.