Terminal, radio communication method, and base station

Abstract

To provide a terminal, a radio communication method, and a base station capable of appropriately performing power control for each layer / port.SOLUTION: In a radio communication system, a user terminal 20 includes a control unit that controls allocation of a power ratio on the basis of a priority corresponding to each of a plurality of channels, and a transmission unit that transmits the plurality of channels on the basis of the power ratio, and appropriately performs power control for each layer / port.SELECTED DRAWING: Figure 16

Description

[Technical Field]

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

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

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

[0004] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0005] In Rel.15 / 16 NR, transmission and reception of channels / signals using multiple antenna ports is controlled so that equal power is applied between antenna ports and between layers.

[0006] However, in future wireless communication systems (such as 6G), it is required to realize higher speed communication in a Multi-Input Multi-Output (MIMO) environment. However, how to achieve high speed communication has not yet been studied. Unless this is clarified, there is a risk of deterioration in communication quality.

[0007] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately perform power control for each layer / port. [Means for solving the problem]

[0008] A terminal according to one aspect of the present disclosure has a control unit that controls the allocation of power ratios based on priorities corresponding to each of a plurality of channels, and a transmission unit that transmits the plurality of channels based on the power ratios. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, power control for each layer / port can be appropriately performed. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are diagrams illustrating an example of a TPMI notification for a UE transmitting for two antenna ports with transform precoding disabled and maximum rank=2. [Figure 2] FIG. 2 is a diagram showing an example of the correspondence between the TPMI index and the precoding matrix W. In FIG. [Figure 3] FIG. 3 is a diagram showing an example of mapping between CWs and layers according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing another example of mapping between CWs and layers according to the first embodiment. [Figure 5] FIG. 5 is a diagram showing another example of mapping between CWs and layers according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of mapping according to embodiment 2-1. [Figure 7] FIG. 7 is a diagram showing an example of the power distribution ratio that is set. [Figure 8] FIG. 8 is a diagram illustrating an example of mapping according to embodiment 2-2. [Figure 9] FIG. 9 is a diagram illustrating an example of mapping according to embodiment 4-1. [Figure 10] FIG. 10 is a diagram illustrating an example of mapping according to embodiment 4-2. [Figure 11] FIG. 11 is a diagram illustrating an example of information related to power distribution according to embodiment 5-2. [Figure 12] 12A and 12B are diagrams illustrating an example of a method for changing the power ratio according to embodiment 5-3. [Figure 13] 13A and 13B are diagrams illustrating an example of a correspondence relationship between DCI code points and power ratios according to embodiment 5-5. [Figure 14] FIG. 14 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 15] FIG. 15 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 16] FIG. 16 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 17] FIG. 17 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] (PUSCH precoder) In NR, a user terminal (User Equipment (UE)) may support at least one of codebook (CB)-based transmission and non-codebook (NCB)-based transmission.

[0012] For example, the UE may use at least a Sounding Reference Signal (SRS) Resource Index (SRI) to determine a precoder (precoding matrix) for CB-based and / or NCB-based Physical Uplink Shared Channel (PUSCH) transmissions.

[0013] The UE may receive information (SRS configuration information, for example, parameters in the RRC control element "SRS-Config") used to transmit a measurement reference signal (for example, a sounding reference signal (SRS)).

[0014] Specifically, the UE may receive at least one of information about one or more SRS resource sets (SRS resource set information, e.g., the RRC control element "SRS-ResourceSet") and information about one or more SRS resources (SRS resource information, e.g., the RRC control element "SRS-Resource").

[0015] An SRS resource set may be associated with (or group together) a predetermined number of SRS resources, each of which may be identified by an SRS Resource Indicator (SRI) or SRS Resource Identifier (ID).

[0016] The SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on SRS usage.

[0017] Furthermore, the use ("usage" of the RRC parameter, "SRS-SetUse" of the L1 (Layer-1) parameter) may be, for example, beam management, codebook (CB), non-codebook (NCB), antenna switching, etc. The SRS for codebook or non-codebook use may be used to determine a precoder for codebook-based or non-codebook-based uplink shared channel (Physical Uplink Shared Channel (PUSCH)) transmission based on the SRI.

[0018] In the case of CB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), a Transmitted Precoding Matrix Indicator (TPMI), etc. In the case of NCB-based transmission, the UE may determine a precoder for PUSCH transmission based on the SRI.

[0019] The SRI, TRI, TPMI, etc. may be notified to the UE using Downlink Control Information (DCI). The SRI may be specified by an SRS Resource Indicator field (SRI field) of the DCI, or may be specified by a parameter "srs-ResourceIndicator" included in an RRC information element "ConfiguredGrantConfig" of a configured grant PUSCH (configured grant PUSCH).

[0020] The TRI and the TPMI may be specified by a "Precoding information and number of layers" field of the DCI. Note that, hereinafter, for simplicity, the "Precoding information and number of layers field" will also be simply referred to as a "Precoding field."

[0021] The maximum number of layers (maximum rank) for UL transmission may be set in the UE by the RRC parameter "maxRank."

[0022] The UE may report UE capability information related to a precoder type, and the base station may configure the precoder type based on the UE capability information through higher layer signaling. The UE capability information may be information on the precoder type used by the UE in PUSCH transmission (which may be represented by the RRC parameter "pusch-TransCoherence").

[0023] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0024] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), etc.

[0025] The UE may determine the precoder to be used for PUSCH transmission based on precoder type information (which may be represented by the RRC parameter "codebookSubset") included in PUSCH configuration information ("PUSCH-Config" information element of RRC signaling) notified by higher layer signaling. The UE may be configured with a subset of the codebook specified by the TPMI by the codebookSubset.

[0026] The precoder type may be specified by any one of full coherent, partial coherent, and non-coherent, or a combination of at least two of these (for example, it may be expressed by parameters such as "fully and partial and non-coherent" or "partial and non-coherent").

[0027] Fully coherent may mean that all antenna ports used for transmission are synchronized (may be expressed as being able to match the phase, using the same precoder, etc.). Partially coherent may mean that some of the antenna ports used for transmission are synchronized, but those some ports cannot be synchronized with other ports. Noncoherent may mean that each antenna port used for transmission cannot be synchronized.

[0028] Note that a UE that supports a fully coherent precoder type may be assumed to support partially coherent and non-coherent precoder types, and a UE that supports a partially coherent precoder type may be assumed to support a non-coherent precoder type.

[0029] The precoder type may be interpreted as coherency, PUSCH transmission coherence, coherent type, coherence type, codebook type, codebook subset, codebook subset type, or the like.

[0030] The UE may determine, from multiple precoders (which may also be called precoding matrices, codebooks, etc.) for CB-based transmission, a precoding matrix corresponding to a TPMI index obtained from the DCI (e.g., DCI format 0_1, etc.) that schedules the UL transmission.

[0031] Specifically, in Rel. 15 / 16 NR, when non-codebook-based transmission is used for PUSCH, a non-codebook-used SRS resource set having up to four SRS resources may be configured for the UE by RRC, and one or more of the up to four SRS resources may be indicated by DCI (a 2-bit SRI field).

[0032] The UE may determine the number of layers (transmission rank) for the PUSCH based on the SRI field. For example, the UE may determine that the number of SRS resources specified by the SRI field is the same as the number of layers for the PUSCH. The UE may also calculate a precoder for the SRS resources.

[0033] If a CSI-RS (which may be referred to as an associated CSI-RS) associated with the SRS resource (or an SRS resource set to which the SRS resource belongs) is configured by a higher layer, the transmit beam for the PUSCH may be calculated based on (measurements of) the configured associated CSI-RS. Otherwise, the transmit beam for the PUSCH may be specified by the SRI.

[0034] The UE may be configured to use codebook-based PUSCH transmission or non-codebook-based PUSCH transmission by a higher layer parameter "txConfig" indicating a transmission scheme. The parameter may indicate a value of "codebook" or "non-codebook."

[0035] In this disclosure, codebook-based PUSCH (codebook-based PUSCH transmission, codebook-based transmission) may refer to a PUSCH when a UE is configured with "codebook" as the transmission scheme. In this disclosure, non-codebook-based PUSCH (non-codebook-based PUSCH transmission, non-codebook-based transmission) may refer to a PUSCH when a UE is configured with "non-codebook" as the transmission scheme.

[0036] 1A and 1B are diagrams illustrating an example of a TPMI notification for a UE transmitting for two antenna ports with transform precoding disabled and maximum rank=2.

[0037] Note that "transform precoding is enabled" may mean that Discrete Fourier Transform spread OFDM (DFT-s-OFDM) is used, and "transform precoding is disabled" may mean that CP-OFDM is used.

[0038] This example shows the relationship (table) between the DCI precoding field (shown as a "bit field mapped to an index" in the figure; the same applies to subsequent similar figures) and the TPMI (TPMI index) in Rel. 15 NR. Note that "codebookSubset=fullyAndPartialAndNonCoherent" in Figure 1A indicates a table referenced by fully coherent UEs, and "codebookSubset=nonCoherent" in Figure 1B indicates a table referenced by noncoherent UEs.

[0039] The UE determines the number of layers to be applied to transmission and the TPMI for the precoding matrix based on the value of the precoding field included in the DCI and the table in Figure 1A / 1B. For example, a fully coherent UE specified with a precoding field of 2 determines to use the number of layers = 2 and TPMI = 0 for PUSCH transmission based on Figure 1A. Note that "reserved" corresponds to a value to be defined in the future.

[0040] Fig. 2 is a diagram showing an example of the correspondence relationship between the TPMI index and the precoding matrix W. Fig. 2 shows the precoding matrix W for two-layer transmission using two antenna ports with transform precoding disabled.

[0041] A UE that has determined to use the number of layers=2 and TPMI=0 for PUSCH transmission according to FIG. 1A applies W corresponding to TPMI=0 in FIG. 2 to PUSCH transmission.

[0042] The UE may calculate a block Z of vectors of complex symbols for each antenna port that is mapped to a resource (e.g., a resource element) based on W and a block Y of vectors of complex symbols for each layer after transform precoding (or layer mapping). For example, Z may be calculated as WY.

[0043] The existing specifications for Rel.15 / 16 NR stipulate that for codebook-based transmission, W is specified by the TPMI indicated by the precoding field as described above, while for non-codebook-based transmission, W is the identity matrix.

[0044] For W in Figure 2, Layer 1 (the first column vector) and Layer 2 (the second column vector) have the same power. For example, when TPMI=0, the sum of squares of each component of the column vector in Layer 1 and the sum of squares of each component of the column vector in Layer 2 are 1 / 2 (=(1 / √2)^2), and the power ratio between Layer 1 and Layer 2 is 1:1.

[0045] As described above, in the existing Rel. 15 / 16 NR, transmission of channels / signals using multiple antenna ports is controlled so that equal power is achieved between antenna ports and equal power / the same modulation and coding scheme (MCS) is applied between layers.

[0046] Note that similar control is applied not only to uplink transmission (for example, PUSCH) but also to downlink transmission (for example, Physical Downlink Shared Channel (PDSCH)).

[0047] In this way, in the existing Rel.15 / 16 NR, power settings are determined for each beam specified by the SRI. Also, when a certain beam is transmitted using multiple ports (streams), the power of each port is equally distributed. Even when precoding (e.g., layer-port mapping) is applied, there is no difference in power (amplitude) between ports.

[0048] Meanwhile, in future wireless communication systems (such as 6G), there is a demand for realizing higher speed communications in a Multi-Input Multi-Output (MIMO) environment.

[0049] More specifically, to improve uplink (UL) communication capacity, the expansion of spatial multiplexing capacity by increasing the MIMO rank is being considered, which will enable simultaneous transmission by multiplexing more transmissions in the spatial direction.

[0050] In future wireless communication systems, it is expected that channel capacity will be maximized by allocating power between ports in descending order of channel singular value using precoding based on singular value decomposition (SVD), eigenmode transmission (E-SDM (Eugenbeam Space Division Multiplexing)), water filling, etc.

[0051] The singular value decomposition of the channel matrix H is V L and U L is an orthogonal matrix, and H=V L ΣU L H In this case, Σ may be a diagonal matrix. U L H is U L may be a matrix (adjoint matrix) obtained by Hermitian transpose of

[0052] The eigenmode transmission is performed by using U as the transmission weight and the reception weight. L and V L H It may be a method of regarding the channel as a plurality of (i.e., rank number) independent communication paths by using each of the above.

[0053] The water-filling theorem may indicate how to allocate power to each stream to maximize channel capacity in E-SDM. The optimal power allocation for each stream i may be expressed by the following equation:

[0054]

number

[0055] In addition, in (Equation 1), the coefficients of each parameter may be different.

[0056] However, when the number of MIMO ranks is expanded, the power allocation for each MIMO layer has not yet been thoroughly studied. More specifically, the power allocation ratio between ports (streams) affects the channel capacity achievable with the transmit beam, but the optimization of the power allocation ratio has not been thoroughly studied in Rel. 15 / 16 NR. Unless this issue is clarified, there is a risk that the increase in communication throughput will be suppressed.

[0057] Therefore, the present inventors have conceived a method for appropriately allocating power between layers / ports. More specifically, they have conceived a method for making the power allocation between layers / ports variable in the transmission of channels / signals using spatial multiplexing in MIMO.

[0058] 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.

[0059] In the present disclosure, "A / B" may mean "at least one of A and B." Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0060] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof.

[0061] The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0062] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0063] In the present disclosure, the terms activate, deactivate, indicate, select, configure, update, determine, etc. may be read interchangeably.

[0064] In the present disclosure, the terms panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (CORESET), Physical Downlink Shared Channel (PDSCH), codeword (CW), transport block (TB), base station, predetermined antenna port (e.g., Demodulation Reference Signal (DMRS) port), predetermined antenna port group (e.g., DMRS port group), predetermined group (e.g., Code Division Multiplexing (CDM) group, predetermined reference signal group, CORESET group), predetermined resource (e.g., predetermined reference signal resource), predetermined resource set (e.g., predetermined reference signal resource set), CORESET pool, PUCCH group (PUCCH resource group), spatial relationship group, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), and so on are used interchangeably. state), QCL, etc. may be read interchangeably.

[0065] Furthermore, the spatial relationship information identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interchangeable. "Spatial relationship information" may be interchangeable with "set of spatial relationship information," "one or more pieces of spatial relationship information," etc. The TCI state and TCI may be interchangeable with each other.

[0066] In this disclosure, the terms index, ID, indicator, and resource ID may be interchangeable. Also, in this disclosure, the terms sequence, list, set, group, cluster, and subset may be interchangeable.

[0067] In the following description of the embodiments, terms such as "Spatial Relation Information (SRI)," "Spatial Relation Information for PUSCH," "Spatial Relation," "UL Beam," "UE Transmit Beam," "UL TCI," "UL TCI State," "Spatial Relation of UL TCI State," SRS Resource Indicator (SRI), SRS Resource, Precoder, etc. may be interchangeable.

[0068] In the present disclosure, the terms layer, port (antenna port), SRS port, DMRS port, stream, etc. may be interchangeable. For example, the power ratio between layers may be interchangeable with the power ratio between ports.

[0069] Furthermore, the term "layer" may be interchangeably read as a group of one or more layers (layer group), a group of one or more ports (port group), etc. For example, layers 1 and 2 may belong to layer group 1, and layer 3 may belong to layer group 2.

[0070] In addition, in the present disclosure, "layer i" (i is an integer) may be read as layer i-1, layer i+1, or any other layer number (i.e., it may be read as any layer number).

[0071] In the present disclosure, the terms "channel" and "signal" may be interchangeable. Furthermore, in the present disclosure, spatially multiplexing channels / signals may mean that the channels / signals are transmitted using the same time resource and frequency resource, or that the channels / signals are transmitted using different layers in the same time resource and frequency resource, etc.

[0072] In the following embodiments, "PUSCH" may be replaced with other UL channels / UL signals (for example, PUCCH, DMRS, SRS).

[0073] In the following embodiments, "PDSCH" may be replaced with other DL channels / DL signals (for example, PDCCH, DMRS, CSI-RS).

[0074] In the following embodiments, "power" may be interpreted as transmission power, and may refer to PUSCH transmission power, PDSCH transmission power, etc. Furthermore, in the present disclosure, power may be interpreted as at least one of the absolute value of a precoding vector / matrix, the sum of squares of all elements of a specific column (or row) of the vector / matrix, the sum of squares of all elements of the vector / matrix, etc.

[0075] (Wireless communication method) First Embodiment A correspondence (mapping) between a TB and a layer may be defined / set. The mapping between a TB and a layer may be called a TB-layer mapping. In each embodiment of the present disclosure, the TB and the CW may be interchangeable. Furthermore, the terms layer, port, layer group, port group, etc. may be interchangeable.

[0076] The mapping may be classified into multiple mappings (or mapping types). In the following description, mapping 1 and mapping 2 are taken as examples, but are not limited to these.

[0077] A specific layer (e.g., layers 1 to N (N is an integer equal to or greater than 1)) may be mapped to a first TB, and layers other than the specific layer (e.g., layers / ports N+1 and above) may be mapped to a second TB (mapping 1). In other words, a specific layer (e.g., layers 1 to N) may correspond to the first TB, and layers other than the specific layer (e.g., layers N+1 and above) may correspond to the second TB.

[0078] A maximum of N layers may be mapped to one TB (mapping 2), in other words, one TB may correspond to a maximum of N layers.

[0079] The number of layers that can be mapped between different TBs may be determined independently based on specific conditions.

[0080] The specific condition may be a condition based on the (maximum) number of layers that can be multiplexed per transmission opportunity.

[0081] Furthermore, the specific condition may be a condition based on the size of TB / CW (payload / number of bits). For example, when a maximum of four layers can be multiplexed and two CWs (e.g., CW#A and CW#B) are multiplexed, if |size(CW#A)-size(CW#B)|≧X (X is a specific value) and size(CW#A)-size(CW#B)>0 are satisfied, three layers may be mapped to CW#A and one layer may be mapped to CW#B.

[0082] The following TB-to-layer mapping is considered as an example: · One TB corresponds to N layers, for a total of N layers (only one TB is transmitted). · One TB corresponds to N layers, for a total of M*N layers (M TBs are (multiplexed) transmitted, and each TB achieves spatial diversity in N layers). · One TB corresponds to one layer, for a total of M layers (M TBs are transmitted (multiplexed), and each TB does not achieve spatial diversity).

[0083] Fig. 3 is a diagram showing an example of mapping of CWs and layers according to the first embodiment. In the example shown in Fig. 3, four CWs are transmitted using four layers, and one CW corresponds to one layer.

[0084] Fig. 4 is a diagram showing another example of mapping of CWs and layers according to the first embodiment. In the example shown in Fig. 4, two CWs are transmitted using four layers, and one CW corresponds to two layers.

[0085] Fig. 5 is a diagram showing another example of mapping of CWs and layers according to the first embodiment. In the example shown in Fig. 5, two CWs are transmitted using four layers, with codeword #0 corresponding to one layer (layer #0) and codeword #1 corresponding to three layers (layers #1 to #3).

[0086] The UE may determine the TB-to-layer mapping based on certain conditions.

[0087] The specific condition may be at least one of the following: ·TB size. · Received power (e.g., RSRP) / received quality (e.g., RSRQ / SINR) of DL / UL RS transmitted by each layer. - Parameter indicating the importance (priority) of TB.

[0088] For example, the UE may determine that a larger number of layers corresponds to a TB with a larger size among the plurality of TBs.Also, for example, the UE may determine that a larger number of layers corresponds to a TB with a higher priority among the plurality of TBs.

[0089] The UE may report information about the determined / decided TB-to-layer mapping to the network (NW, e.g., base station). The feedback may be performed periodically or in response to a notification / trigger from the NW.

[0090] This allows the mapping between TB and layers to be variable after semi-statically fixing / setting the relationship between power ratios and layers, for example by matching the order of power ratios in each layer to the order of layer numbers, thereby enabling flexible control of power ratios according to the characteristics of TBs while suppressing an increase in notification overhead.

[0091] Furthermore, the TB-layer mapping may be configured / instructed / notified to the UE from the NW. The configuration / instruction / notification may be performed by at least one of higher layer signaling and physical layer signaling.

[0092] For example, the UE may be notified / instructed of the number of layers per TB using DCI.

[0093] For example, if multiple TBs (e.g., PUSCHs) transmitted using different layers are scheduled / activated in one DCI, information regarding the number of layers for each TB may be included in the one DCI.

[0094] Also, for example, when multiple TBs (e.g., PUSCHs) transmitted using different layers are scheduled / activated by different DCIs, information on the number of layers for each TB may be included in each DCI or in a specific DCI. The specific DCI may be at least one of the DCI last (most recently) received by the UE, the DCI last (most recently) transmitted in the time direction, and the DCI with the last (most recently) monitoring occasion.

[0095] Also, for example, the UE may be configured with multiple pieces of information (candidates) regarding TB-to-layer mapping using RRC signaling / MAC CE, and may be instructed on mapping from the multiple pieces of information using DCI.

[0096] According to the first embodiment described above, the spatial diversity effect and spatial multiplexing effect of MIMO can be appropriately utilized according to the TB / CW to be multiplexed.

[0097] <Second embodiment> The second embodiment relates to power control based on the size of the transport block (TBS).

[0098] In the second embodiment, the power distribution of the multiplexed transmission channels / signals may be variable based on the TBS of the multiplexed transmission channels / signals. The UE may determine the power distribution of the multiplexed transmission channels / signals based on the TBS of the multiplexed transmission channels / signals.

[0099] <<Embodiment 2-1>> In embodiment 2-1, power distribution to a plurality of transmission channels / signals (for example, PUSCH) of different TBs may be controlled based on the ratio of TBSs between the plurality of transmission channels / signals.

[0100] For example, when X PUSCHs (eg, X=4) of different TBSs are spatially multiplexed, the UE may determine the power allocation ratio for the PUSCHs based on the ratio of TBSs among the four PUSCHs.

[0101] In embodiment 2-1, power distribution may be determined according to the following steps 1 to 3. In the following, four PUSCHs (PUSCHs #0 to #3) are used as an example, but the number of PUSCHs is not limited to this, and any channel / signal may be transmitted.

[0102] The TBSs (TBSs #0 to #3) of the four spatially multiplexed PUSCHs (PUSCHs #0 to #3) are determined / calculated (step 1).

[0103] Each PUSCH is mapped to a layer (step 2). Fig. 6 shows a case where PUSCHs #0 to #3 are mapped to layers #0 to #3, respectively.

[0104] When mapping layers to ports, the power at each port is calculated as P i is determined based on the ratio of TBSs (step 3). In FIG. 6, the case where the transmission powers of PUSCHs #0 to #3 are set to P0 to P3, respectively, is shown.

[0105] The power P corresponding to port i (here, i=0 to 3) in step 3 above i may be calculated by the following formula:

[0106]

number

[0107] where P Total may be the transmit power determined by open loop power control / closed loop power control.

[0108] In addition, when mapping layers to ports, the power P i For , the power based on the ratio of TBSs may be set using higher layer signaling (step 3').

[0109] If the above mapping 1 is applied (mapping 1 is assumed), the UE may control power distribution according to steps 1 to 3 (3') above.

[0110] Furthermore, when the above-described mapping 2 is applied (mapping 2 is assumed), the UE may determine that layers / ports corresponding to the same TB / CW are one layer group / port group.

[0111] In this case, the power distribution ratio determination method described in embodiment 2-1 may be applied to determining the power ratio between layer groups / port groups. The power ratio between multiple layers / ports in one group may be equal or unequal. The UE may determine the equal / unequal power ratio (value) based on, for example, CSI information of each layer / port in one group.

[0112] According to embodiment 2-1, it is possible to omit signaling of the power ratio as appropriate, thereby reducing the signaling overhead for the UE.

[0113] <<Embodiment 2-2>> In embodiment 2-2, power distribution to multiple transmission channels / signals (e.g., PUSCH) of different TBs may be controlled based on the configured / pre-configured power distribution ratio and the TBS assigned to each of the multiple transmission channels / signals.

[0114] For example, when X PUSCHs (e.g., X=4) of different TBSs are spatially multiplexed, the UE may determine the power allocation ratio for the PUSCHs based on information about the preset power allocation ratio and the size of the TBSs allocated to the four PUSCHs.

[0115] In embodiment 2-2, power distribution may be determined according to the following steps 1 and 2. In the following, an example of four PUSCHs (PUSCHs #0 to #3) will be described, but the number of PUSCHs is not limited to this, and any channel / signal may be transmitted.

[0116] The TBSs (TBSs #0 to #3) of the four spatially multiplexed PUSCHs (PUSCHs #0 to #3) are determined / calculated, and the four PUSCHs are ordered / re-ordered (step 1).

[0117] PUSCH and port mapping is performed so that the power distribution ratio based on the TBS is set (step 2).

[0118] Fig. 7 is a diagram showing an example of the power distribution ratios to be set. As shown in Fig. 7, the power ratios corresponding to the ports (ports #0 to #3) are set in advance in the UE. In the present disclosure, information regarding the power distribution ratios may be set / notified to the UE using higher layer signaling (e.g., RRC signaling / MAC CE).

[0119] In step 1 above, the UE orders the four PUSCHs in descending (or descending) order of TBS (for example, assume that the orders are PUSCH#2, PUSCH#1, PUSCH#3, and PUSCH#0 in descending order).

[0120] In the above step 2, the UE maps PUSCHs to ports so that a higher power allocation ratio is assigned to a PUSCH with a large (or small) TBS. At this time, the UE may determine that PUSCH #0 corresponds to port #3, PUSCH #1 corresponds to port #1, PUSCH #2 corresponds to port #0, and PUSCH #3 corresponds to port #2 (see FIG. 8).

[0121] Note that when the above mapping 1 is applied (mapping 1 is assumed), the UE may control power distribution according to steps 1 and 2 above.

[0122] Furthermore, when the above-described mapping 2 is applied (mapping 2 is assumed), the UE may determine that layers / ports corresponding to the same TB / CW are one layer group / port group.

[0123] In this case, the power distribution ratio determination method described in embodiment 2-2 may be applied to determining the power ratio between layer groups / port groups. The power ratio between multiple layers / ports in one group may be equal or unequal. The UE may determine the equal / unequal power ratio (value) based on, for example, CSI information of each layer / port in one group.

[0124] According to embodiment 2-2, it becomes possible to control the power ratio more flexibly.

[0125] According to the second embodiment, optimal coverage compensation can be achieved by performing power distribution control based on TBS.

[0126] <Third embodiment> The third embodiment relates to power control based on the payload size of an uplink shared channel (eg, UL-SCH / PUSCH).

[0127] In the third embodiment, power allocation for an uplink shared channel may be determined based on the payload size of the uplink shared channel.

[0128] The payload size of the uplink shared channel may be the payload size of the MAC-PDU set / signaled by a higher layer, and the UE may determine power allocation for the uplink shared channel based on the payload size of the MAC-PDU set / signaled by a higher layer.

[0129] <<Embodiment 3-1>> In embodiment 3-1, power distribution to a plurality of transmission channels / signals (for example, PUSCH) may be controlled based on the ratio of payloads between the plurality of transmission channels / signals.

[0130] For example, when X PUSCHs (eg, X=4) of different TBSs are spatially multiplexed, the UE may determine the power allocation ratio for the PUSCHs based on the payload ratio among the four PUSCHs.

[0131] In embodiment 3-1, power distribution may be determined according to the following steps 1 to 3. In the following, an example of four PUSCHs (PUSCHs #0 to #3) will be described, but the number of PUSCHs is not limited to this.

[0132] The payloads (payloads #0 to #3) of the four spatially multiplexed PUSCHs (PUSCHs #0 to #3) are determined / calculated (step 1).

[0133] Each PUSCH is mapped to a layer (step 2).

[0134] When mapping layers to ports, the power at each port is calculated as P i ,based on the payload ratio (step 3).

[0135] Power P in step 3 above imay be calculated by the following formula:

[0136]

number

[0137] The payload size may be, for example, the number of bits (also represented as A) in one transport block delivered to layer 1 (or the total number of bits in the bit sequence of the transport block).

[0138] In addition, when mapping layers to ports, the power at each port is calculated as P i For , the power based on the payload ratio may be set using higher layer signaling (step 3').

[0139] Note that when the above-described mapping 1 is applied (mapping 1 is assumed), the UE may control power distribution according to the above steps 1 to 3 (3').

[0140] Furthermore, when the above-described mapping 2 is applied (mapping 2 is assumed), the UE may determine that layers / ports corresponding to the same TB / CW are one layer group / port group.

[0141] In this case, the power distribution ratio determination method described in embodiment 3-1 may be applied to determining the power ratio between layer groups / port groups. The power ratio between multiple layers / ports in one group may be equal or unequal. The UE may determine the equal / unequal power ratio (value) based on, for example, CSI information of each layer / port in one group.

[0142] According to embodiment 3-1, it is possible to omit signaling of the power ratio as appropriate, thereby reducing the signaling overhead for the UE.

[0143] <<Embodiment 3-2>> In embodiment 3-2, power distribution to multiple transmission channels / signals (e.g., PUSCH) may be controlled based on the configured / pre-configured power distribution ratio and the payload allocated to each of the multiple transmission channels / signals.

[0144] For example, when X PUSCHs (e.g., X=4) of different TBSs are spatially multiplexed, the UE may determine the power allocation ratio for the PUSCHs based on information about the preset power allocation ratio and the size of the payload allocated to the four PUSCHs.

[0145] In embodiment 3-2, power distribution may be determined according to the following steps 1 and 2. In the following, an example of four PUSCHs (PUSCHs #0 to #3) will be described, but the number of PUSCHs is not limited to this, and any channel / signal may be transmitted.

[0146] The payloads (payloads #0 to #3) of the four spatially multiplexed PUSCHs (PUSCHs #0 to #3) are determined / calculated, and the four PUSCHs are ordered (ordered / re-ordered) (step 1).

[0147] PUSCH and port mapping is performed so that the power distribution ratio based on the payload is set (step 2).

[0148] The above steps 1 and 2 will be explained with reference to FIG.

[0149] In step 1 above, the UE orders the four PUSCHs in descending order of payload size (or descending order of payload size) (for example, assume that the orders are PUSCH#2, PUSCH#1, PUSCH#3, and PUSCH#0 in descending order).

[0150] In the above step 2, the UE maps PUSCHs to ports so that a higher power allocation ratio is set for PUSCHs with a large (or small) payload. At this time, the UE may determine that PUSCH #0 corresponds to port #3, PUSCH #1 corresponds to port #1, PUSCH #2 corresponds to port #0, and PUSCH #3 corresponds to port #2.

[0151] Note that when the above mapping 1 is applied (mapping 1 is assumed), the UE may control power distribution according to steps 1 and 2 above.

[0152] Furthermore, when the above-described mapping 2 is applied (mapping 2 is assumed), the UE may determine that layers / ports corresponding to the same TB / CW are one layer group / port group.

[0153] In this case, the power distribution ratio determination method described in embodiment 3-2 may be applied to determining the power ratio between layer groups / port groups. The power ratio between multiple layers / ports in one group may be equal or unequal. The UE may determine the equal / unequal power ratio (value) based on, for example, CSI information of each layer / port in one group.

[0154] According to embodiment 3-2, it becomes possible to control the power ratio more flexibly.

[0155] According to the third embodiment, optimal coverage compensation can be achieved by controlling power distribution based on the payload.

[0156] <Fourth embodiment> The fourth embodiment relates to power control based on the transmission channel / signal (type / content).

[0157] <<Embodiment 4-1>> When different transmission channels / signals are transmitted (or spatially multiplexed) using multiple layers, power distribution of the transmission channels / signals may be determined based on the transmission channel / signal (type / content).

[0158] 9 shows an example in which UL channels / UL signals #1-#4 are mapped to layers #0 to #3, respectively. Based on which transmission channel / signal is to be transmitted, the UE may determine the transmit power (e.g., P0 to P3) or power allocation of the transmission channel / signal.

[0159] The transmission channel / signal may be of at least one of the following types / contents: ·PUSCH only. PUSCH containing UCI (contents include HARQ-ACK information / SR / CSI reports). ·PUCCH. Physical Sidelink Shared Channel (PSSCH). Physical Sidelink Control Channel (PSCCH). ·PRACH. ·SRS.

[0160] In the present disclosure, the terms PUSCH, uplink data channel, uplink shared channel, uplink data, etc. may be interchangeable. Also, the terms UCI, PUCCH, and uplink control information may be interchangeable.

[0161] A priority may be defined for each transmission channel / signal (type / content) (embodiment 4-1-1). The UE may control power distribution based on the priority.

[0162] For example, the UE may allocate a larger power ratio to a transmission channel / signal (type / content) with a higher priority.

[0163] For example, the priority may be an existing priority (defined up to Rel. 16). For example, the priority may be defined in the following order: PRACH transmission on the PCell. · PUCCH or PUSCH transmission with a higher (lower) priority index. In the case of PUCCH and PUSCH transmissions with the same priority index, PUCCH transmissions including HARQ-ACK information / SR / link recovery request (LRR) or PUSCH transmissions including HARQ-ACK information. In the case of PUCCH and PUSCH transmission with the same priority index, PUCCH transmission including CSI or PUSCH transmission including CSI. In the case of PUCCH and PUSCH transmissions with the same priority index, the PUSCH transmission does not include HARQ-ACK information or CSI, is a PUSCH transmission for a random access procedure (e.g., a Type 2 random access procedure), and is a PUSCH transmission on a PCell. SRS transmission of aperiodic SRS with higher priority than semi-persistent / periodic SRS, or PRACH transmission in a serving cell other than the PCell.

[0164] Additionally, new priorities for each channel / signal may be defined for MIMO multiplexing (spatial division multiplexing (SDM)).

[0165] For example, the new priorities may be defined in the following order of decreasing priority: PUSCH transmission with UCI multiplexed. PUSCH transmission without UCI multiplexing. ·PUCCH transmission including HARQ-ACK information / SR. PUCCH transmission containing only CSI reports.

[0166] Note that the order of priority of channels / signals (types / contents) described in each embodiment of the present disclosure is merely an example, and the order of priority may be any order of priority in which any channel / signal (type / content) within the described priorities is interchangeable.

[0167] Different types of transmission channels / signals may be spatially multiplexed, and in this case, the power ratio between layers may be determined according to at least one of the following embodiments 4-1-2 to 4-1-4.

[0168] The PUSCH and the PUCCH may be spatially multiplexed (embodiment 4-1-2).

[0169] In this case, the priority of channels (types / contents) may be set in the following order: PUSCH with UCI (including at least HARQ-ACK), ·PUSCH, PUCCH with at least HARQ-ACK, PUCCH that does not include HARQ-ACK.

[0170] In embodiment 4-1-2, one or more layers may correspond to each channel (type / content). For example, two layers may correspond to the PUSCH, and one layer other than the layer corresponding to the PUSCH may correspond to the PUCCH.

[0171] The PUSCH and the PSSCH may be spatially multiplexed (embodiment 4-1-3).

[0172] In embodiment 4-1-3, the priority of channels (types / contents) may be set in the following order (embodiment 4-1-3-1): ·PUSCH, ·PSSCH.

[0173] Furthermore, in embodiment 4-1-3, if certain conditions are met, the power of PUSCH transmission or PSSCH transmission may be specified in the specifications or set by higher layer signaling (RRC signaling / MAC CE) regardless of the transmission power set / instructed for PUSCH transmission / PSSCH transmission (embodiment 4-1-3-2).

[0174] The specific condition may be, for example, whether or not precoding used for spatial multiplexing of PUSCH and PSSCH is configured. For example, if precoding used for spatial multiplexing of PUSCH and PSSCH is not configured, the UE may determine the power ratio of PSSCH to be a specific value (for example, 0). In this case, the power ratio of PUSCH may be 1-(specific value).

[0175] In embodiment 4-1-3, one or more layers may correspond to each channel (type / content). For example, two layers may correspond to the PUSCH, and one layer other than the layer corresponding to the PUSCH may correspond to the PSSCH.

[0176] The PUSCH and the PRACH may be spatially multiplexed (embodiment 4-1-4).

[0177] In embodiment 4-1-4, the priority of channels (types / contents) may be set in the following order (embodiment 4-1-3-1): (When PRACH is ordered on PDCCH) ·PUSCH, ·PRACH. (if not) ·PRACH, ·PUSCH.

[0178] Furthermore, in embodiment 4-1-4, if certain conditions are met, the power of PUSCH transmission or PRACH transmission may be specified in the specifications or set by higher layer signaling (RRC signaling / MAC CE) regardless of the transmission power set / instructed for PUSCH transmission / PRACH transmission (embodiment 4-1-4-2).

[0179] The specific condition may be, for example, whether or not precoding used for spatial multiplexing of PUSCH and PRACH is configured. For example, if precoding used for spatial multiplexing of PUSCH and PRACH is not configured, the UE may determine the power ratio of PUSCH to be a specific value (for example, 0). In this case, the power ratio of PRACH may be 1-(specific value).

[0180] Furthermore, the specific condition may be, for example, whether the PRACH is set corresponding to the reception of the SSB. For example, if the PRACH is set corresponding to the reception of the SSB, the UE may determine the power ratio of the PUSCH to be a specific value (for example, 0). In this case, the power ratio of the PRACH may be 1-(the specific value).

[0181] In embodiment 4-1-3, one or more layers may correspond to each channel (type / content). For example, two layers may correspond to the PUSCH, and one layer other than the layer corresponding to the PUSCH may correspond to the PSSCH.

[0182] When the above-described mapping 1 is applied (when mapping 1 is assumed), the UE may control power distribution according to the above-described embodiment 4-1.

[0183] Furthermore, when the above-mentioned mapping 2 is applied (mapping 2 is assumed), the UE may determine that layers / ports corresponding to the same TB / CW / channel / signal (RS) / sequence are one layer group / port group.

[0184] In this case, the power distribution ratio determination method described in embodiments 2-2 and 3-2 may be applied to determine the power ratio between layer groups / port groups. The power ratio between multiple layers / ports in one group may be equal or unequal. The UE may determine the equal / unequal power ratio (value) based on, for example, CSI information of each layer / port in one group.

[0185] [Modification of embodiment 4-1] When different channels / signals are spatially multiplexed, the power ratio of a specific channel with a lower priority may be determined to be 0. In other words, when different channels / signals are spatially multiplexed, a specific channel with a lower priority may be dropped.

[0186] For example, when the PUSCH and the PRACH are spatially multiplexed, the UE may drop the PUSCH (may determine to set the power ratio of the PUSCH to 0).

[0187] According to embodiment 4-1, it is possible to appropriately control power distribution for each transmitted channel / signal.

[0188] <<Embodiment 4-2>> Channels / signals other than the PUSCH may be spatially multiplexed using multiple layers / ports.

[0189] For example, PUCCH may be spatially multiplexed in multiple layers / ports. Figure 10 shows an example in which PUCCHs #1-#4 are mapped to layers #0 to #3, respectively. In this case, the power ratio in each layer may be determined / controlled according to at least one of the first to third embodiments described above.

[0190] Furthermore, the power ratio in each layer may be determined / controlled based on uplink control information multiplexed onto the PUCCH (or transmitted using the PUCCH). For example, when HARQ-ACK is mapped onto PUCCH#1 and CSI is mapped onto PUCCH#2 (HARQ-ACK is not mapped), the transmission power of PUCCH#1 may be set higher than the transmission power of PUCCH#2. Note that one piece of uplink control information may be mapped onto multiple layers.

[0191] Furthermore, for example, PRACHs may be spatially multiplexed in multiple layers / ports, and the power ratios in each layer may be determined / controlled according to at least one of the first to third embodiments described above.

[0192] According to embodiment 4-2, it is possible to appropriately distribute power in spatial multiplexing of channels / signals other than the PUSCH.

[0193] <Fifth embodiment> The fifth embodiment relates to power control based on control information.

[0194] In the fifth embodiment, the power distribution (power ratio) between layers / ports may be determined based on control information (e.g., DCI) received from the base station. The UE may determine the power distribution (power ratio) between layers / ports based on (a specific field included in) the DCI.

[0195] Embodiment 5-1 In embodiment 5-1, the UE may be notified / instructed of the power ratio for each layer / port according to the number of layers / ports supported by the UE. The UE may report UE capability information relating to the number of layers / ports supported by the UE to the network (NW, base station).

[0196] For example, the UE may determine the power ratio for each layer / port according to the number of layers / ports based on a specific field included in the DCI.

[0197] In embodiment 5-1, the power ratio in each layer / port may be determined based on the CSI feedback / SRS reception quality for each layer / port.

[0198] Also, in embodiment 5-1, after a first period (e.g., x symbols) from the UE transmitting CSI feedback / SRS for each layer / port (receiving them by the NW), the UE may receive control information notifying / indicating the power ratio.

[0199] In addition, in embodiment 5-1, after the UE receives control information notifying / instructing the power ratio, the UE may apply the power ratio notified / instructed in the control information in slots / symbols from the second period (e.g., y1 symbols / slots) onwards.

[0200] In addition, in embodiment 5-1, after the UE receives control information notifying / instructing the power ratio, in slots / symbols prior to the third period (e.g., y2 symbols / slots), the UE may apply the power ratio notified / instructed by the control information.

[0201] Embodiment 5-2 In embodiment 5-2, information on power distribution (information on power ratios) as described in above embodiments 2-2 and 3-2 may be set in advance in the UE. The UE may be instructed by control information (DCI) (specific fields included in the DCI) of the power ratios corresponding to multiple layers / ports included in the set information on power distribution.

[0202] The granularity of each power ratio value (e.g., 0.1) may be specified, and the sum of the power ratios in multiple layers / ports corresponding to one codepoint in a specific field included in the DCI may be a specific value (e.g., 1).

[0203] Fig. 11 is a diagram illustrating an example of information related to power distribution according to embodiment 5-2. As illustrated in Fig. 11, a plurality of power ratios for layers #0 to #3 are configured for the UE as information related to power distribution. The UE determines the power ratios to be applied to layers #0 to #3 based on a specific field (a code point of the field) included in the DCI. In the example illustrated in Fig. 11, when the DCI code point indicates 01, the UE determines that the power ratio for each layer is 0.25.

[0204] In addition, in the diagram illustrating the DCI instructions in the present disclosure as shown in Figure 11, the number of bits of the DCI code point, the number of layers / ports, the power ratio value, and the number of TB / CWs are merely examples and are not limited to the examples described.

[0205] Embodiment 5-3 In embodiment 5-3, information on power distribution (information on power ratios) as described in above embodiments 2-2 and 3-2 may be set in the UE in advance. The UE may be notified / instructed, using control information (e.g., DCI), of a power ratio value for a specific period from among a plurality of power ratio values ​​included in the set information on power distribution.

[0206] The specific period may be notified / configured / instructed to the UE using higher layer signaling / physical layer signaling, or may be specified in a specification.

[0207] For example, when the number of slots for receiving control information (DCI) is N, the specific period may be a period from N+a1 slot to N+a2 slot. a1 and a2 may be configured / instructed to the UE by higher layer signaling / physical layer signaling, or may be defined in a specification.

[0208] Furthermore, when the number of slots for receiving control information (DCI) is N, the specific period may be a period after N+a3 slots. a3 may be configured / instructed to the UE by higher layer signaling / physical layer signaling, or may be defined in the specifications.

[0209] Furthermore, the specific period may be a period from reception of the control information (DCI) to the nth (n is an integer equal to or greater than 1) UL transmission.

[0210] In this way, by making it possible to set the power ratio only in an appropriate period, it becomes possible to set the power ratio taking into consideration factors that are expected to fluctuate over time (for example, channel quality).

[0211] In addition, in embodiment 5-3, information on power distribution (information on power ratios) as described in above embodiments 2-2 and 3-2 may be set in the UE in advance. The UE may be notified / instructed to change one or more power ratio values ​​included in the set information on power distribution to specific values ​​using control information (e.g., DCI).

[0212] The specific value may be 0. In this case, the UE may increment (increase) the power ratio values ​​of layers / ports other than those instructed to be changed to 0 by the control information (DCI) by the same value so that the sum of the power ratio values ​​becomes 1.

[0213] Alternatively, the specific value may be 1. In this case, the UE may change the value of the power ratio in a layer / port other than the layer / port instructed to be changed to 1 by the control information (DCI) to 0.

[0214] Information regarding the specific value may be configured / indicated to the UE using higher layer signaling / control information (DCI). The information regarding the specific value may be information indicating that the specific value is 0 or 1.

[0215] In this way, by making it possible to change the values ​​of the multiple power ratios that are set, it becomes possible to perform appropriate power control when there is a layer / port corresponding to a channel whose channel quality has momentarily deteriorated.

[0216] 12A and 12B are diagrams illustrating an example of a method for changing a power ratio according to embodiment 5-3. FIG. 12A and 12B illustrate a method for instructing, using a DCI, to change the power ratio of a specific layer to 0. The UE may be instructed, using a DCI, of one layer whose power ratio is to be changed to 0 (FIG. 12A). The UE may also be instructed, using a DCI, of one or more layers whose power ratios are to be changed to 0 (FIG. 12B).

[0217] Embodiment 5-4 In embodiment 5-4, information on power allocation for each TB / CW (information on power ratio) may be set in advance in the UE. The UE may be instructed by control information (DCI) (specific fields included in the DCI) of the power ratios corresponding to multiple TB / CWs included in the information on power allocation to be set (embodiment 5-4-1).

[0218] The granularity of each power ratio value (e.g., 0.1) may be specified. Also, the sum of the power ratios in multiple TB / CWs corresponding to one codepoint in a specific field included in the DCI may be a specific value (e.g., 1).

[0219] In embodiment 5-4-1, the power ratios of multiple layers / ports corresponding to the same TB / CW may be set / controlled according to at least one of the second to fifth embodiments described above. For example, the power ratios corresponding to multiple TB / CWs may be determined as described in this embodiment, and the power ratios of multiple layers / ports corresponding to the same TB / CW may be determined according to embodiment 5-2 or 5-3 described above. Also, for example, the power ratios corresponding to multiple TB / CWs may be determined as described in this embodiment, and the power ratios of multiple layers / ports corresponding to the same TB / CW may be determined according to embodiment 2-2 described above.

[0220] In addition, in embodiment 5-4, information on power allocation for each TB / CW (information on power ratio) may be set in advance in the UE. The UE may be notified / instructed, using control information (e.g., DCI), of the power ratio value for a specific period from among multiple power ratio values ​​included in the set information on power allocation (embodiment 5-4-2).

[0221] The specific period may be notified / configured / instructed to the UE using higher layer signaling / physical layer signaling, or may be specified in a specification.

[0222] For example, when the number of slots for receiving control information (DCI) is N, the specific period may be a period from N+a1 slot to N+a2 slot. a1 and a2 may be configured / instructed to the UE by higher layer signaling / physical layer signaling, or may be defined in a specification.

[0223] Furthermore, when the number of slots for receiving control information (DCI) is N, the specific period may be a period after N+a3 slots. a3 may be configured / instructed to the UE by higher layer signaling / physical layer signaling, or may be defined in the specifications.

[0224] Furthermore, the specific period may be a period from reception of the control information (DCI) to the nth (n is an integer equal to or greater than 1) UL transmission.

[0225] In addition, in embodiment 5-4, information on power allocation for each TB / CW (information on power ratio) may be set in advance in the UE. The UE may be notified / instructed to change one or more power ratio values ​​included in the information on power allocation to specific values ​​using control information (e.g., DCI) (embodiment 5-4-3).

[0226] The specific value may be 0. In this case, the UE may increment (increase) the power ratio values ​​of layers / ports other than those instructed to be changed to 0 by the control information (DCI) by the same value so that the sum of the power ratio values ​​becomes 1.

[0227] Alternatively, the specific value may be 1. In this case, the UE may change the value of the power ratio in a layer / port other than the layer / port instructed to be changed to 1 by the control information (DCI) to 0.

[0228] Information regarding the specific value may be configured / indicated to the UE using higher layer signaling / control information (DCI). The information regarding the specific value may be information indicating that the specific value is 0 or 1.

[0229] In embodiments 5-4-2 and 5-4-3, the power ratios of multiple layers / ports corresponding to the same TB / CW may be set / controlled according to at least one of the second to fifth embodiments described above. For example, the power ratios corresponding to multiple TB / CWs may be determined as described in this embodiment, and the power ratios of multiple layers / ports corresponding to the same TB / CW may be determined according to embodiment 5-2 or 5-3 described above. Also, for example, the power ratios corresponding to multiple TB / CWs may be determined as described in this embodiment, and the power ratios of multiple layers / ports corresponding to the same TB / CW may be determined according to embodiment 2-2 described above.

[0230] <<Embodiment 5-5>> In embodiment 5-5, an example of a DCI field used for reporting the power ratio will be described.

[0231] The UE may use one DCI field (code point) to determine power ratios corresponding to multiple layers / ports (embodiment 5-5-1).

[0232] The correspondence between the DCI field (code point) and the power ratio may be defined in advance in a specification, or may be notified to the UE using higher layer signaling.

[0233] 13A is a diagram illustrating an example of a correspondence relationship between DCI code points and power ratios according to embodiment 5-5. As shown in FIG. 13A, a correspondence relationship is defined / set such that one DCI code point corresponds to the power ratios (power setting values) of multiple layers. Based on this correspondence relationship, the UE determines the power ratio corresponding to one code point indicated by the DCI.

[0234] Furthermore, the UE may use multiple DCI fields (code points) to determine power ratios corresponding to multiple layers / ports (embodiment 5-5-2).

[0235] The correspondence between the DCI field (code point) and the power ratio may be defined in advance in a specification, or may be notified to the UE using higher layer signaling.

[0236] The UE may receive the DCI field (codepoint) for the number of layers / ports / TBs / CWs.

[0237] 13B is a diagram illustrating another example of a correspondence relationship between DCI code points and power ratios according to embodiment 5-5. As illustrated in FIG. 13B, for a specific TB, a correspondence relationship is defined / set such that one DCI code point corresponds to the power ratios of multiple layers. Based on this correspondence relationship, the UE determines, for each TB, the power ratio corresponding to the code point indicated by the DCI.

[0238] In addition, in embodiment 5-5, an association between channel / signal priority (for example, the priority described in embodiment 4) and layer / port index may be defined. For example, an association may be defined in which a channel / signal with a high priority corresponds to a small (or large) layer / port index. According to this, for example, by associating channels with layers, it is possible to reduce the number of bits in the DCI field that changes the power ratio.

[0239] According to the fifth embodiment, power distribution corresponding to layer / port / TB / CW can be appropriately and flexibly controlled using control information.

[0240] <Other> In the above embodiment, an example has been shown in which the power distribution ratio is set in proportion to the size of the TBS / payload, but the power distribution ratio may also be set in inverse proportion to the size of the TBS / payload.

[0241] Regarding the power distribution ratio in at least one of the above embodiments, the layer / inter-port power ratio may be set / indicated / notified using higher layer signaling (RRC information element / MAC CE) / physical layer signaling (DCI).

[0242] For the power distribution ratio in at least one of the above embodiments, a layer / port power ratio may be determined in a precoding matrix. In this case, the power ratios between layers may be the same or different. In the present disclosure, the power ratio may be read as an amplitude ratio (in a precoding matrix).

[0243] For the power ratio, the power at each port may be determined according to at least one of the results of singular value decomposition of the channel matrix using SVD and the water-filling theorem, which may be expressed by Equation 1 above.

[0244] Power control in each embodiment of the present disclosure may be applied to repeated transmissions. The UE may determine / apply the same power ratio throughout multiple repeated transmissions. Alternatively, the UE may determine / apply a power ratio independently for each repeated transmission (each transmission). For example, the UE may be configured / informed in advance of inter-layer / port power ratio candidates for each repeated transmission (each transmission), and may be notified of one power ratio from the candidates in DCI that triggers the repeated transmission.

[0245] Furthermore, the power control in the present disclosure may be applied to retransmission control. When retransmitting a channel / signal, the UE may determine / apply the same power ratio as that of the initial transmission / previous retransmission. Furthermore, the UE may determine / apply a power ratio independently for each retransmission (each transmission) (for example, the UE may determine the transmission power of only a specific layer to be a specific value (for example, 1 or 0)).

[0246] It should be noted that at least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.

[0247] The specific UE capabilities may indicate at least one of the following: Whether to support PUSCH power control per layer / port / TRP; Whether spatial multiplexing using at least a specific number (e.g., 4) of layers / ports and / or a specific number (e.g., 2) of CWs is supported; Whether spatial multiplexing of different channels / signals is supported; ·Whether spatial multiplexing of channels / signals other than PUSCH (e.g., PUCCH / PRACH) is supported.

[0248] The specific UE capability may be a capability for a CB-based PUSCH, a capability for an NCB-based PUSCH, or a capability that does not distinguish between these.

[0249] Furthermore, the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., cell, band, BWP), capabilities for each frequency range (e.g., FR1, FR2), or capabilities for each subcarrier spacing.

[0250] Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0251] Furthermore, at least one of the above-described embodiments may be applied when specific information related to the above-described embodiments is configured in the UE by higher layer signaling (if not configured, for example, the operation of Rel. 15 / 16 is applied). For example, the specific information may be information indicating that PUSCH power is enabled for each layer / port / TRP, any RRC parameter for a specific release (e.g., Rel. 18), etc. Furthermore, the UE may be configured using higher layer parameters as to which of the above-described embodiments / cases / conditions PHR control is to be performed based on.

[0252] The "layer" in the present disclosure may be interpreted as at least one of "TRP," "RS (e.g., SRS, reference RS corresponding to TCI state)," "PUSCH transmission corresponding to RS," "PDSCH transmission / reception corresponding to RS," "PUSCH," "PDSCH," "a group formed by PUSCH transmission corresponding to one or more RSs (a group including PUSCH transmission corresponding to one or more RSs)," "a group formed by PDSCH transmission / reception corresponding to one or more RSs (a group including PDSCH transmission / reception corresponding to one or more RSs)," etc.

[0253] (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.

[0254] 14 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP).

[0255] 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.

[0256] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

[0257] 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 the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0258] 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.

[0259] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0260] 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 above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.

[0261] 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.

[0262] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 interface, or the like) or wirelessly (for example, 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.

[0263] 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.

[0264] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0265] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio 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).

[0266] The radio access scheme may also be called a waveform. Note that in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0267] 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.

[0268] 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)), etc. may be used as an uplink channel.

[0269] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0270] 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.

[0271] 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 an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0272] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search 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 a CORESET associated with a certain search space based on the search space configuration.

[0273] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0274] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement 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.

[0275] 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.

[0276] 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, 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 as DL-RS.

[0277] 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 the SS (PSS, SSS) and the PBCH (and 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 reference signals.

[0278] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. 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).

[0279] (base station) 15 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.

[0280] 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.

[0281] 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.

[0282] 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 to be transmitted as signals, control information, sequences, etc., 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.

[0283] 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.

[0284] The transmitting / receiving unit 120 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 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0285] 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 pertains, such as an array antenna.

[0286] 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.

[0287] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0288] The transceiver 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.

[0289] The transceiver 120 (transmission processor 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.

[0290] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0291] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0292] 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.

[0293] 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.

[0294] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0295] 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.

[0296] The transceiver 120 may transmit, to the terminal, information for determining, for each of a plurality of different transport blocks (TBs), the number of layers corresponding to each of the plurality of TBs, and for controlling the association of each of the plurality of TBs with layers. The transceiver 120 may receive, using one or more layers, each of the plurality of different TBs transmitted in the same time resource and frequency resource (first embodiment).

[0297] The transceiver 120 may transmit, to a terminal, information for controlling application of different power ratios to the uplink shared channels based on at least one of the transport block size and the payload size of the uplink shared channels. The transceiver 120 may receive the uplink shared channels to which the different power ratios are applied (second and third embodiments).

[0298] The transceiver 120 may transmit, to the terminal, information for applying different power ratios to one or more layers corresponding to each of the plurality of channels based on the priority corresponding to each of the plurality of channels. The transceiver 120 may receive the plurality of channels to which the different power ratios are applied in the same time resource and frequency resource (fourth embodiment).

[0299] The transceiver 120 may transmit information for applying different power ratios to multiple layers to a terminal, and may receive the uplink control channel and the random access channel of the multiple layers, which are transmitted by the terminal based on the information and to which the different power ratios are applied (fourth embodiment).

[0300] The transceiver 120 may transmit configuration information and downlink control information to be notified using higher layer signaling in order to control the application of different power ratios to multiple layers. The transceiver 120 may receive uplink shared channels of the multiple layers to which the different power ratios are applied (fifth embodiment).

[0301] (user terminal) 16 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.

[0302] Note that this example mainly shows functional blocks of the characteristic parts of the present embodiment, 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.

[0303] 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, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0304] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also 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.

[0305] 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 from 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.

[0306] 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.

[0307] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0308] 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.

[0309] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0310] The transceiver 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.

[0311] The transceiver 220 (transmission processor 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.

[0312] Whether or not to apply DFT processing may be based on the setting of a transform precoder. When a transform precoder 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 when a transform precoder is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0313] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0314] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0315] The transceiver 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 to acquire user data, etc.

[0316] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, 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.

[0317] The transmitting section and receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0318] The control unit 210 may determine the number of layers corresponding to each of a plurality of different transport blocks (TBs) for each TB, and control the association of each of the plurality of TBs with layers. The transceiver unit 220 may transmit each of the plurality of different TBs using one or more layers in the same time resource and frequency resource (first embodiment).

[0319] The control unit 210 may determine the number of layers and the layer corresponding to each of the plurality of TBs based on at least one of the size of each of the plurality of TBs, at least one of a downlink reference signal and an uplink reference signal, and the priority of the TB (first embodiment).

[0320] The control unit 210 may determine the number of layers corresponding to each of the plurality of different TBs by using at least one of higher layer signaling and downlink control information (first embodiment).

[0321] The number of layers may be the maximum number of layers that can be multiplexed for one transmission opportunity (first embodiment).

[0322] The control unit 210 may perform control to apply different power ratios to the multiple uplink shared channels based on at least one of the transport block size and the payload size of the multiple uplink shared channels. The transceiver unit 220 may transmit the multiple uplink shared channels by applying the different power ratios (second and third embodiments).

[0323] The control unit 210 may determine the different power ratios based on the ratios of the transport blocks of the multiple uplink shared channels (second embodiment).

[0324] The control unit 210 may determine the different power ratios based on a ratio of payload sizes of Medium Access Control Protocol Data Units (MAC-PDUs) for the multiple uplink shared channels (third embodiment).

[0325] The transceiver 220 may receive information about the different power ratios using higher layer signaling. The controller 210 may control the application of the different power ratios based on the information about the different power ratios and at least one of the transport block size and the payload size (second and third embodiments).

[0326] The control unit 210 may perform control to apply different power ratios to one or more layers corresponding to each of the multiple channels based on the priority corresponding to each of the multiple channels. The transceiver unit 220 may apply the different power ratios to transmit the multiple channels using the same time resource and frequency resource (fourth embodiment).

[0327] The plurality of channels may be at least two of a physical uplink shared channel, a physical uplink control channel, a physical sidelink shared channel, a physical sidelink control channel, a physical random access channel, and a sounding reference signal (fourth embodiment).

[0328] A channel including a Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) may have a higher priority than a channel not including a HARQ-ACK (fourth embodiment).

[0329] The control unit 210 may determine that the power ratio in the layer corresponding to at least one of a channel and a signal with a low priority among the different types of channels and / or signals is 0 (fourth embodiment).

[0330] The control unit 210 may perform control to apply different power ratios to multiple layers. The transceiver unit 220 may transmit at least one of the uplink control channel and the random access channel of the multiple layers by applying the different power ratios (fourth embodiment).

[0331] The control unit 210 may determine that a plurality of layers correspond to different pieces of uplink control information included in the uplink control channel (fourth embodiment).

[0332] When transmitting the uplink control channel of multiple layers, the control unit 210 may determine the different power ratios by giving priority to a layer that transmits Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK) information included in the uplink control channel (fourth embodiment).

[0333] The control unit 210 may perform control to apply different power ratios to multiple layers based on at least one of configuration information and downlink control information notified by higher layer signaling. The transceiver unit 220 may transmit uplink shared channels of the multiple layers by applying the different power ratios (fifth embodiment).

[0334] The different power ratios may be based on at least one of a report of channel state information and a reception quality of a sounding reference signal (fifth embodiment).

[0335] The control unit 210 may change the power ratio of at least one of a specific layer and TB in the setting information to a specific value based on the downlink control information (fifth embodiment).

[0336] (Hardware configuration) 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 also be realized by combining the single device or multiple devices with software.

[0337] 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 mentioned above, the implementation method of each is not particularly limited.

[0338] For example, a base station, a user terminal, etc. 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. 17 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, etc.

[0339] In this disclosure, terms such as apparatus, circuit, device, section, unit, etc. may be read 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.

[0340] 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.

[0341] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as 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.

[0342] 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), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0343] 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 realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0344] The memory 1002 is a computer-readable recording medium and may be configured by at least one of, for example, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage medium. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to an embodiment of the present disclosure.

[0345] Storage 1003 is a computer-readable recording medium and may be constituted by 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, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as a secondary storage device.

[0346] 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.

[0347] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0348] 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.

[0349] 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 such hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0350] (Variation) Note that terms explained 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.

[0351] 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.

[0352] 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, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0353] A slot may be composed of one or more symbols in the time domain (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol), and may be a time unit based on numerology.

[0354] 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.

[0355] 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.

[0356] 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 a subframe and a 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.

[0357] 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. However, the definition of TTI is not limited to this.

[0358] 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.

[0359] 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.

[0360] 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.

[0361] 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 equal to or greater than 1 ms.

[0362] 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 also be determined based on numerology.

[0363] 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. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0364] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0365] 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.

[0366] A Bandwidth Part (BWP), which may also be referred to as a fractional 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 given BWP and numbered within that BWP.

[0367] The BWP may include an UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0368] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel / signal outside the active BWP. Note that the terms "cell," "carrier," etc. in this disclosure may be replaced with "BWP."

[0369] 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.

[0370] 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.

[0371] 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.

[0372] 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.

[0373] 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.

[0374] 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.

[0375] Notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, 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.

[0376] Note that the physical layer signaling may be called 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 called 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).

[0377] 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).

[0378] 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).

[0379] 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.

[0380] 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), then these wired and / or wireless technologies are included within the definition of transmission media.

[0381] 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).

[0382] In the present disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," etc. may be used interchangeably.

[0383] In this 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.

[0384] 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 divided 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 term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0385] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0386] 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.

[0387] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, or the mobile object itself. 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). 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.

[0388] 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, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0389] 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.

[0390] 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0391] 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 specific order presented.

[0392] Each aspect / embodiment described in the present disclosure may be related to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems that use 802.20, Ultra-Wide Band (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, or to next-generation systems that are based on and extend these systems. Furthermore, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0393] 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."

[0394] 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.

[0395] 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.

[0396] 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.

[0397] Also, "decision" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. In other words, "decision" may be considered to be "deciding" on some action.

[0398] Furthermore, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," or the like.

[0399] 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."

[0400] 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.

[0401] 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."

[0402] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0403] 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.

[0404] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and explanatory and does not impose any limiting meaning on the invention according to the present disclosure.

Claims

1. a control unit that controls allocation of power ratios based on priorities corresponding to the respective channels; a transmitter that transmits the plurality of channels based on the power ratio.

2. controlling allocation of power ratios based on priorities corresponding to each of the plurality of channels; and transmitting the plurality of channels based on the power ratio.

3. a transmitter that transmits, to a terminal, information for allocating a power ratio based on a priority corresponding to each of a plurality of channels; a receiving unit that receives the plurality of channels based on the power ratio.

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