Terminals, wireless communication methods, base stations and systems

Abstract

A terminal according to an embodiment of the present disclosure is characterized by having: a transmission unit for transmitting a medium access control control element (MAC CE) including a power headroom (PHR) for each serving cell or each panel if uplink (UL) simultaneous transmission from multiple panels is supported; and a control unit for controlling the transmission of the MAC CE on the basis of a specific condition. According to the embodiment of the present disclosure, transmission power control can be appropriately performed.

Description

[Technical Field]

[0001] This disclosure relates to terminals and wireless communication methods in next-generation mobile communication systems. 、 base station and system Regarding. [Background technology]

[0002] Long Term Evolution (LTE) was specified for Universal Mobile Telecommunications System (UMTS) networks with the aim of achieving even higher data rates and lower latency (Non-Patent Literature 1). Furthermore, LTE-Advanced (3GPP Rel.10-14) was specified for the aim of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP®) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being considered. [Prior art documents] [Non-patent 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 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In future wireless communication systems, the UE (Unified Aircraft) may use one of its multi-panel (or multi-beam) configurations for uplink (UL) transmission. Furthermore, to improve UL throughput and reliability, support for simultaneous UL transmission using multiple panels (e.g., simultaneous multi-panel UL transmission (SiMPUL / sTxMP)) to one or more transmission / reception points (TRPs) is being considered.

[0006] When multi-panel simultaneous UL transmission is supported, the UE transmits ULs from two panels simultaneously, but the reporting / calculation of PHRs in this case is unclear. For example, the events / conditions that trigger PHRs are unclear. This could lead to improper transmission control and reduced communication throughput.

[0007] Therefore, this disclosure relates to a terminal capable of appropriately controlling the transmission power, and a wireless communication method. 、 base station and system One of the objectives is to provide [this]. [Means for solving the problem]

[0008] A terminal relating to one aspect of this disclosure is a multi-panel simultaneous transmission device. Capability information supporting two power headroom (PHR) reports. A transmitting unit that sends, If the path loss of the reference signal corresponding to a serving cell changes below a predetermined threshold, the PHR is triggered. A control unit and Furthermore, if the multi-panel simultaneous transmission is set for the serving cell, the control unit includes the two PHRs in the MAC (Medium Access Control) control element (CE). . [Effects of the Invention]

[0009] According to one aspect of this disclosure, the transmission power can be appropriately controlled. [Brief explanation of the drawing]

[0010] [Figure 1]Figures 1A and 1C show examples of PUSCH transmission using multiple panels. [Figure 2] Figures 2A and 2B show examples of PUCCH transmission using multiple panels. [Figure 3] Figure 3 shows an example of a single-entry PHR MAC CE in Rel.16 NR. [Figure 4] Figure 4 shows an example of a multiple-entry PHR MAC CE in Rel.16 NR. [Figure 5] Figure 5 shows an overview of PHR transmission. [Figure 6] Figures 6A-6D show an example of a MAC CE for a PHR according to a second embodiment. [Figure 7] Figure 7 shows an example of a schematic configuration of a wireless communication system according to one embodiment. [Figure 8] Figure 8 shows an example of the configuration of a base station according to one embodiment. [Figure 9] Figure 9 shows an example of the configuration of a user terminal according to one embodiment. [Figure 10] Figure 10 shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. [Figure 11] Figure 11 shows an example of a vehicle according to one embodiment. [Modes for carrying out the invention]

[0011] (Multi-panel transmission) In Rel.15 and Rel.16 UEs, only one beam and panel are used for UL transmission at a single point in time (Figure 1A). In Rel.17, to improve UL throughput and reliability, simultaneous multi-beam and multi-panel UL transmission is being considered for one or more transmission / reception points (TRPs).

[0012] For simultaneous UL transmissions using multi-beam and multi-panel systems, reception by a single TRP with multiple panels (Figure 1B) or reception by two TRPs with ideal backhaul (Figure 1C) is being considered. A single PDCCH is being considered for scheduling multiple PUSCHs (e.g., simultaneous transmission of PUSCH#1 and PUSCH#2). Support for panel-specific transmissions and the introduction of panel IDs are being considered.

[0013] A base station may configure or instruct panel-specific transmissions for UL transmissions using a UL Transmission Configuration Indication (TCI) or panel ID. UL TCI (UL TCI state) may be based on signaling similar to DL beam indications supported in Rel. 15. A panel ID may be implicitly or explicitly applied to at least one transmission of a target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If a panel ID is explicitly communicated, it may be configured in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).

[0014] In simultaneous UL transmission using a multi-panel, the UE may transmit on multiple physical uplink control channels (PUCCHs). The following schemes 1 and 2 have been considered as transmission methods for simultaneous UL transmission using a multi-panel for PUCCHs.

[0015] [Scheme 1] Two PUCCH resources overlap in the time domain and are transmitted simultaneously. Each of the two PUCCH resources is associated with one different panel / beam (see Figure 2A). Each of the two beams is transmitted towards its respective TRP.

[0016] [Scheme 2] One PUCCH resource is transmitted simultaneously using two panel / spatial relationships. One PUCCH resource is associated with two panels / beams (see Figure 2B). Each of the two beams is transmitted towards its respective TRP.

[0017] Although the explanation uses the example of two multi-panels, the number of panels may be three or more in this disclosure. In other words, the number of panels, 2, may be interpreted as 3 or more.

[0018] Furthermore, Scheme 2 may be applied to the repetition of PUCCH in a single-frequency network (SFN).

[0019] Furthermore, in simultaneous UL transmission using a multi-panel, the UE may transmit on multiple physical uplink sharing channels (PUSCH). The following scheme 3-5 has been considered as a transmission method for simultaneous UL transmission using a multi-panel for PUSCH.

[0020] [Scheme 3] • Single DCI (S-DCI) based Space Division Multiplexing (SDM) scheme: In this method, different layers / DMRS ports of a single PUSCH are precoded separately and transmitted simultaneously from different UE beams / panels. However, issues to consider with this method include whether to support two CW (codeword) signals and whether to transmit simultaneously from two different UE beams / panels.

[0021] [Scheme 4] • S-DCI-based SFN method: In this method, the same layer / DMRS port of a single pusher transmits simultaneously from two completely different UE beams / panels.

[0022] [Scheme 5] • M-DCI's PUSCH simultaneous transmission method: In this method, two independent PUSCHs associated with different TRPs are transmitted simultaneously within the same active BWP. For example, the total number of layers for the two PUSCHs may be up to four. The number of layers for each of these two PUSCHs may be specified by the specification, for example, 1-3 layers, or a maximum of 2 layers.

[0023] (UL TCI state) In Rel.16 NR, the use of the UL TCI state as a beam designation method for UL is being considered. Notification of the UL TCI state is similar to notification of the UE DL beam (DL TCI state). Note that the DL TCI state may be interpreted interchangeably with the TCI state for PDCCH / PDSCH.

[0024] The channel / signal (which may also be called the target channel / RS) on which the UL TCI state is set (specified) may be at least one of the following: PUSCH (DMRS for PUSCH), PUCCH (DMRS for PUCCH), Random Access Channel (Physical Random Access Channel (PRACH)), SRS, etc.

[0025] Furthermore, the RS (source RS) that has a QCL relationship with the channel / signal may be, for example, a DL RS (e.g., SSB, CSI-RS, TRS, etc.) or a UL RS (e.g., SRS, SRS for beam management, etc.).

[0026] In the UL TCI state, the RS that has a QCL relationship with the channel / signal may be associated with the panel ID for receiving or transmitting the RS. This association may be explicitly set (or specified) by higher-layer signaling (e.g., RRC signaling, MAC CE, etc.) or implicitly determined.

[0027] The correspondence between the RS and the panel ID may be set included in the UL TCI state information, or may be set included in at least one of the resource setting information, spatial relationship information, etc. of the RS.

[0028] The QCL type indicated by the UL TCI state may be the existing QCL types A - D, or may be other QCL types, or may include a predetermined spatial relationship, related antenna ports (port indices), etc.

[0029] For UL transmission, when the UE is specified with the related panel ID (e.g., specified by DCI), the UE may perform the UL transmission using the panel corresponding to the panel ID. The panel ID may be associated with the UL TCI state. When the UE specifies (or activates) the UL TCI state for a predetermined UL channel / signal, the UE may identify the panel to be used for the UL channel / signal transmission according to the panel ID associated with the UL TCI state.

[0030] (Transmission Power Control) <Transmission Power Control for PUSCH> In NR (e.g., Rel.16), the transmission power of the PUSCH is controlled based on the TPC command (also referred to as a value, increment / decrement value, correction value, etc.) indicated by the value of a predetermined field (also referred to as the TPC command field, etc.) in the DCI.

[0031] For example, when the UE transmits a PUSCH on the active UL BWP b of the carrier f of the serving cell c using the parameter set (open - loop parameter set) with index j and the index l of the power control adjustment state, the transmission power of the PUSCH (P PUSCH、b,f,c (i,j,q d ,l)) in the PUSCH transmission occasion (also referred to as the transmission period, etc.) i may be represented by the following formula (1).

[0032] TIFF0007884669000001.tif36167

[0033] Here, the power control adjustment state may be configured by a higher-level parameter to have multiple states (e.g., two states) or a single state. Furthermore, if multiple power control adjustment states are configured, one of these states may be identified by an index l (e.g., l ∈ {0, 1}). The power control adjustment state may be referred to as the PUSCH power control adjustment state, the first or second state, etc.

[0034] Furthermore, the PUSCH transmission opportunity i is a predetermined period during which PUSCH is transmitted, and may consist of, for example, one or more symbols, one or more slots, etc.

[0035] In equation (1), P CMAX,f,c (i) is, for example, the transmit power of the user terminal set for the carrier f of serving cell c in transmission opportunity i (also called maximum transmit power, UE maximum output power, etc.). O_PUSCH,b,f,c (j) is, for example, a parameter relating to the target received power set for the active UL BWP b of the carrier f of serving cell c in parameter set setting j (also known as a parameter relating to the transmit power offset, transmit power offset P0, target received power parameter, etc.).

[0036] M PUSCH RB,b,f,c (i) is, for example, the number of resource blocks (bandwidth) allocated to PUSCH for transmission opportunities i in the active UL BWP b of a carrier f with serving cell c and subcarrier spacing μ. α b,f,c (j) is a value provided by the higher-level parameters (e.g., msg3-Alpha, p0-PUSCH-Alpha, fractional factors, etc.).

[0037] PL b,f,c (qd ) is, for example, the index q of the reference signal for the downlink BWP (path loss reference RS, DL RS for path loss measurement, PUSCH - PathlossReferenceRS) associated with the active UL BWP b of carrier f of serving cell c. d It is the path loss (path loss compensation) calculated at the user equipment using.

[0038] Δ TF,b,f,c (i) is the transmission power adjustment component (offset, transmission format compensation) for UL BWP b of carrier f of serving cell c.

[0039] [[ID=!2]] f b,f,c (i, l) is a value based on the TPC command of the power control adjustment state index l of the active UL BWP of carrier f of serving cell c and transmission opportunity i (for example, power control adjustment state, cumulative value of TPC command, value by closed - loop). l may be called the closed - loop index.

[0040] When the UE is not provided with the path loss reference RS (for example, PUSCH - PathlossReferenceRS), or when the UE is not provided with individual upper layer parameters, the UE may use the RS resource from the SSB used to obtain the Master Information Block (MIB) to calculate PL b,f,c (q d ) may be calculated.

[0041] If the UE has set up a number of RS resource indexes up to the maximum number of path loss reference RSs (e.g., maxNrofPUSCH-PathlossReferenceRS) and a set of RS settings for each RS resource index by path loss reference RS, then the set of RS resource indexes may include one or both of the set of SS / PBCH block indexes and the set of CSI-RS resource indexes. The UE has set up an RS resource index q d They may be identified.

[0042] If a PUSCH transmission is scheduled by a Random Access Response (RAR) UL grant, the UE uses the same RS resource index q as for the corresponding PRACH transmission. d You may also use [this].

[0043] If the UE is provided with a setting for power control of the PUSCH by a sounding reference signal (SRS) resource indicator (SRI) (e.g., SRI-PUSCH-PowerControl), and is provided with one or more values ​​for the ID of the path loss reference RS, the UE may obtain a mapping between a set of values ​​for the SRI field in DCI format 0_1 ​​and a set of ID values ​​for the path loss reference RS from higher-layer signaling (e.g., sri-PUSCH-PowerControl-Id in SRI-PUSCH-PowerControl). From the ID of the path loss reference RS mapped to the SRI field value in DCI format 0_1 ​​that schedules the PUSCH, the UE can obtain the RS resource index q d You may decide that.

[0044] If the PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with PUCCH spatial relation information for the PUCCH resource having the lowest index for each carrier f and the active UL BWP b of the serving cell c, the UE may use the same RS resource index q as the PUCCH transmission within the said PUCCH resource d for it.

[0045] If the PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with the spatial setting of the PUCCH transmission, or if the PUSCH transmission is scheduled by DCI format 0_1 that does not include the SRI field, or if the power control setting of the PUSCH by SRI is not provided to the UE, the UE may use the RS resource index q having the ID of the zero path loss reference RS d for it.

[0046] For the PUSCH transmission configured by the configured grant setting (e.g., ConfiguredGrantConfig), if the configured grant setting includes a predetermined parameter (e.g., rrc-CofiguredUplinkGrant), the RS resource index q d may be provided to the UE.

[0047] For the PUSCH transmission configured by the configured grant setting, if the configured grant setting does not include a predetermined parameter, the UE may determine the RS resource index q from the value of the ID of the path loss reference RS mapped to the SRI field in the DCI format that activates the PUSCH transmission. If the DCI format does not include the SRI field, the UE may determine the RS resource index q having the ID of the zero path loss reference RS d For it. d For it.

[0048] <Transmission Power Control for PUCCH> In addition, in NR, the transmit power of PUCCH is controlled based on the TPC command (also called value, increment / decrement value, correction value, instruction value, etc.) indicated by the value of a predetermined field in DCI (also called the TPC command field, first field, etc.).

[0049] For example, using the power control adjustment state index l, the PUCCH transmission power (P) during the PUCCH transmission occasion (also called the transmission period, etc.) i for the active UL BWP b of the carrier f of serving cell c can be calculated. PUCCH、b,f,c (i,q u ,q d ,l)) may also be expressed by the following formula (2).

[0050] TIFF0007884669000002.tif35167

[0051] The power control adjustment state may also be called the PUCCH power control adjustment state, the first or second state, etc.

[0052] Furthermore, the PUCCH transmission opportunity i is a predetermined period during which PUCCH is transmitted, and may consist of, for example, one or more symbols, one or more slots, etc.

[0053] In equation (2), P CMAX,f,c (i) is, for example, the transmit power of the user terminal set for the carrier f of serving cell c in transmission opportunity i (also called maximum transmit power, UE maximum output power, etc.). O_PUCCH,b,f,c (q u ) is, for example, a parameter relating to the target received power set for the active UL BWP b of the carrier f of serving cell c in a transmission opportunity i (also known as a parameter relating to the transmit power offset, transmit power offset P0, or target received power parameter, etc.).

[0054] MPUCCH RB,b,f,c (i) is the number of resource blocks (bandwidth) allocated to PUCCH for transmission opportunities i in the active UL BWP b of a serving cell c and carrier f with subcarrier spacing μ. b,f,c (q d ) is, for example, the index q of the reference signal for the downlink BWP (path loss reference RS, path loss measurement DL RS, PUCCH-PathlossReferenceRS) associated with the active UL BWP b of the carrier f of serving cell c. d This is the path loss calculated on the user terminal using [a specific method / tool].

[0055] Δ F_PUCCH (F) is a higher-level parameter given for each PUCCH format. Δ TF,b,f,c (i) is the transmission power adjustment component (offset) for the UL BWP b of the carrier f of serving cell c.

[0056] g b,f,c (i,l) is the value based on the TPC command of the above power control adjustment state index l of the active UL BWP of the carrier f of serving cell c and transmission opportunity i (e.g., power control adjustment state, cumulative value of TPC commands, closed-loop value, PUCCH power adjustment state).

[0057] If the UE is provided with information indicating the use of two PUCCH power control adjustment states (twoPUCCH-PC-AdjustmentStates) and PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), then l = {0, 1}. If the UE is not provided with information indicating the use of two PUCCH power control adjustment states or PUCCH spatial relationship information, then l may be 0.

[0058] If the UE obtains the TPC command value from DCI format 1_0 or 1_1, and the UE is provided with PUCCH spatial relation information, the UE may obtain the mapping between the PUCCH spatial relation information ID (pucch-SpatialRelationInfoId) value and the closed-loop index (closedLoopIndex, power adjustment state index l) by the index provided by the P0 ID for PUCCH (p0-PUCCH-Id within p0-Set within PUCCH-PowerControl within PUCCH-Config). If the UE receives an activation command including the value of the PUCCH spatial relation information ID, the UE may determine the value of the closed-loop index that provides the value of l through the link to the corresponding P0 ID for PUCCH.

[0059] If for the active UL BWP b of carrier f of serving cell c, the UE, for the corresponding PUCCH power adjustment state l, the setting of the P O_PUCCH,b,f,c (q u ) value is provided by the upper layer, then g b,f,c (i, l) = 0, k = 0, 1,..., i. If the UE is provided with PUCCH spatial relation information, the UE may determine the value of l from the value of q u based on the P0 ID for PUCCH corresponding to q, the closed-loop index value corresponding to l, and the PUCCH spatial relation information associated therewith. u

[0060] q u may be the P0 ID for PUCCH (p0-PUCCH-Id) indicating the P0 for PUCCH (P0-PUCCH) within the P0 set for PUCCH (p0-Set).

[0061] <Transmission Power Control for SRS> For example, using the power control adjustment state index l, the transmitted power (P) of the Sounding Reference Signal (SRS) at the transmission occasion (also called the transmission period, etc.) i for the active UL BWP b of the carrier f of serving cell c is measured. SRS、b,f,c (i,q s ,l)) may also be expressed by the following formula (3).

[0062] The power control adjustment state may also be called the SRS power control adjustment state, a value based on TPC commands, a cumulative value of TPC commands, a closed-loop value, or the first or second state. l may also be called the closed-loop index.

[0063] Furthermore, the SRS transmission opportunity i is a predetermined period during which the SRS is transmitted, and may consist of, for example, one or more symbols, one or more slots, etc.

[0064] TIFF0007884669000003.tif35167

[0065] In equation (3), P CMAX,f,c (i) is, for example, the maximum UE output power for the carrier f of the serving cell c in an SRS transmission opportunity i. O_SRS,b,f,c (q s ) is the active UL BWP b of the carrier f of serving cell c, and the SRS resource set q s These are parameters related to the target received power (provided by SRS-ResourceSet and SRS-ResourceSetId) and provided by p0 (for example, parameters related to the transmit power offset, transmit power offset P0, or target received power parameters, etc.).

[0066] M SRS,b,f,c(i) is the SRS bandwidth expressed as the number of resource blocks for SRS transmission opportunities i on the active UL BWP b of a serving cell c and carrier f with subcarrier spacing μ.

[0067] α SRS,b,f,c (q s ) is the active UL BWP b of the serving cell c and carrier f with subcarrier spacing μ, and the SRS resource set q s And is provided by α (for example, alpha) for .

[0068] PL b,f,c (q d ) is the active DL BWP of serving cell c and SRS resource set q s And, in contrast, RS resource index q d This is the DL path loss estimate [dB] calculated by UE using the RS resource index q. d is SRS resource set q s It is an associated path loss reference RS (provided by a path loss measurement DL RS, e.g., pathlossReferenceRS), and is either an SS / PBCH block index (e.g., ssb-Index) or a CSI-RS resource index (e.g., csi-RS-Index).

[0069] h b,f,c (i,l) is the SRS power control adjustment state for the active UL BWP of the carrier f of serving cell c, and the SRS transmission opportunity i. If the setting of the SRS power control adjustment states (e.g., srs-PowerControlAdjustmentStates) indicates the same power control adjustment state for SRS transmission and PUSCH transmission, then h b,f,c (i,l) represents the current PUSCH power control adjustment state f b,f,c This is the same as (i,l).

[0070] PUSCH, PUCCH, SRS transmission opportunity i is slot index n within the frame of system frame number SFN. s,fμ The slot may be defined by the first symbol S and the number of consecutive symbols L. In the case of a PUSCH transmission of repetition type B, the opportunity to transmit a PUSCH may be a nominal repetition.

[0071] (power requirements) In NR, the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure) is being considered. UE is required to meet Federal Communications Commission (FCC) regulations regarding maximum radiation exposure to the human body for health and safety reasons.

[0072] For example, Rel.15 NR specifies limitations using Power-management Maximum Power Reduction (P-MPR / PMPR, maximum allowable UE output power reduction) to limit exposure. For example, in the case of non-carrier aggregation (CA), the UE maximum output power P CMAX,f,c is the corresponding P UMAX,f,c The (measured maximum output power, measured set maximum UE output power) is set to satisfy equation (4) below.

[0073] TIFF0007884669000004.tif21167

[0074] EIRP max P-MPR is assumed to be the maximum value of the corresponding measured peak effective isotropic radiated power (EIRP). f,c Let P-MPR be a value that indicates the reduction in the maximum output power allowed to the carrier f of serving cell c. f,c The carrier f of serving cell c is set to the maximum UE output power P. CMAX,f,c It is introduced into the equation. The corresponding total radiated power PTMAX,f,c is P TMAX,f,c ≤TRP max is established

[0075] In the case of carrier aggregation (CA), the maximum output power P CMAX,f,c of the UE is set so that the corresponding P UMAX,f,c satisfies the following equation (5).

[0076] TIFF0007884669000005.tif20167

[0077] The measured P for carrier aggregation UMAX is defined as P UMAX =Σ c,f(c) P UMAX,f,c Here, P UMAX,f,c is the linear value of the measured power P UMAX,f,c for the carrier f = f(c) of the serving cell c. The measured total radiated power P TMAX is defined as P TMAX = 10log 10 Σ c,f(c) P TMAX,f,c Here, P TMAX is the linear value of the measured value of the total radiated power P TMAX,f,c for the carrier f = f(c) of the serving cell c. The total radiated power P TMAX is such that P TMAX ≤TRP max is bounded as follows.

[0078] That is, the UE can set its maximum output power as P UMAX so that the measured peak EIRP (P TMAX ) is within the lower and upper limits, and the measured total radiated power P<00​​​​​​​​​​In NR, it is being considered that one or more transmission / reception points (TRPs) (multi-TRPs (M-TRPs)) will perform DL transmissions to the UE using one or more panels (multi-panels). Furthermore, it is being considered that the UE will perform UL transmissions to one or more TRPs.

[0080] Incidentally, in future wireless systems (e.g., NR from Rel.17 onwards), there is consideration being given to using a single DCI (Single DCI, S-DCI) to indicate multiple (e.g., two) SRS Resource Indicators (SRIs) / Transmitted Precoding Matrix Indicators (TPMIs) for repeated push transmission of multiple TRPs (MTRP push repetition).

[0081] For example, in the case of codebook-based transmission, the UE may determine the precoder for push transmission based on the SRI, Transmitted Rank Indicator (TRI), and TPMI. In the case of non-codebook-based transmission, the UE may determine the precoder for push transmission based on the SRI. The SRI may be specified to the UE by DCI or provided by higher-layer parameters.

[0082] If a single DCI points to multiple SRI / TPMIs, the following options 1 or 2 are possible: Option 1: Use a field to indicate multiple (e.g., two) SRI / TPMI values ​​for multiple (e.g., two) TRPs. Option 2: A field is designated to indicate one SRI / TPMI, and that field is set with code points corresponding to multiple (e.g., two) SRI / TPMI values.

[0083] In Option 1, each code point of multiple SRI / TPMI fields may correspond to a single TPMI value. The correspondence (association) between SRI / TPMI fields and SRI / TPMI values ​​may be defined in advance in the specification. Alternatively, the correspondence (association) between SRI / TPMI fields and SRI / TPMI values ​​may use the correspondences defined up to Rel. 16, or the correspondences defined in Rel. 17 or later. The correspondence between SRI / TPMI fields and SRI / TPMI values ​​may differ for each of the multiple SRI / TPMI fields.

[0084] In Option 2, a code point that points to one SRI / TPMI field may correspond to multiple (e.g., two) SRI / TPMI values. The correspondence (association) between SRI / TPMI fields and SRI / TPMI values ​​may be defined in advance in the specification, or it may be notified / configured / activated by RRC signaling / MAC CE.

[0085] Furthermore, it is being considered that repeated push transmissions using a single push transmission / single TRP (STRP) and repeated push transmissions using multiple TRPs (MTRP) will be dynamically instructed / switched by DCI. This dynamic switching may utilize specific fields included in DCI as defined up to Rel.16, or specific fields as defined in Rel.17 and later (for example, fields for specifying STRP or MTRP operation).

[0086] Furthermore, “dynamic switch” in this disclosure may mean “a switch that uses at least one of upper-layer signaling and physical-layer signaling.” Also, “switch” in this disclosure may be interpreted as switching, change, changing, applying, directing, setting, etc.

[0087] (PHR) In future wireless communication systems (e.g., NR), the UE will send a Power Headroom Report (PHR) to the network, which will contain information about the power margin (Power Headroom (PH)) per serving cell. The network can then use the PHR to control the UE's uplink transmit power.

[0088] When M-TRP PUSCH is supported / configured / enabled and reporting two PHRs for two TRPs is configured / enabled, it is being considered to include two PHRs (the first PHR and the second PHR) in the PHR MAC CE. Reporting two PHRs for two TRPs may also be configured for the UE by a higher-layer parameter (RRC parameter).

[0089] Here, the first PHR may be reported as in Rel. 15 / 16. The second PHR may be a PHR of a different TRP than the first PHR. The second PHR may be reported as an actual PHR or as a virtual PHR.

[0090] The actual PHR is the PHR based on actual push transmissions and may also be called the real PHR. The actual PHR may be calculated based on the power control parameters for actual push transmissions.

[0091] A virtual PHR is a PHR that does not depend on an actual push transmission (it is based on a reference push transmission) and may also be called a reference PHR or a PHR that conforms to a reference format. The virtual PHR may be calculated based on default power control parameters already specified in Rel. 15 / 16 NR, or it may be calculated based on new default power control parameters.

[0092] When the UE determines that the type 1 power headroom report of the active serving cell is based on the actual PUSCH transmission, for the PUSCH transmission opportunity i on the active UL BWP b of carrier f of serving cell c, the UE calculates the type 1 power headroom report as shown in the following formula (6). The PHR in formula (6) may also be referred to as the actual PHR.

[0093] TIFF0007884669000006.tif19167

[0094] When the UE determines that the type 1 power headroom report of the active serving cell is based on the reference PUSCH transmission, for the PUSCH transmission opportunity i on the active UL BWP b of carrier f of serving cell c, the UE calculates the type 1 power headroom report as shown in the following formula (7). The PHR in formula (7) may also be referred to as the virtual PHR.

[0095] TIFF0007884669000007.tif13167

[0096] Here, P<000009F>(i) bar (P with a tilde above (i)) is calculated assuming MPR = 0 dB, A-MPR = 0 dB, P-MPR = 0 dB, and ΔT<000009G>= 0 dB. A-MPR means Additional MPR. For the remaining parameters, P<000009H>(j) and α<000009I>(j) are such that P<00000A0>(0), p0-PUSCH-AlphaSetId = 0 is used, and PL<00000A1>(q<00000A2>) is such that pusch-PathlossReferenceRS-Id = 0, l = 0 is used.

[0097] (PHR MAC CE) ​​PHRs may also be transmitted via MAC (Medium Access Control) signaling using PUSCH (Physical Uplink Shared Channel). For example, PHRs are notified using a PHR MAC CE (Control Element) contained within a MAC PDU (Protocol Data Unit).

[0098] NR supports single-entry PHR MAC CEs for primary cells (PCells).

[0099] Figure 3 shows an example of a single-entry PHR MAC CE in Rel.16 NR. This MAC CE consists of 2 octets (=16 bits). In Figure 3, each 'R' represents a 1-bit reserved field, which is set to a value such as '0'.

[0100] In Figure 3, 'PH(Type 1,PCell)' represents a 6-bit field indicating an index for the Type 1 PH of the Primary Cell (PCell). This index for PH is associated with a specific PH value (in decibels (dB)) (or level).

[0101] For example, Type 1 PH may be PH when PUSCH is taken into consideration (e.g., only PUSCH's power is taken into consideration), Type 2 PH may be PH when PUCCH is taken into consideration (e.g., both PUSCH and PUCCH's power is taken into consideration), and Type 3 PH may be PH when the Sounding Reference Signal (SRS) is taken into consideration (e.g., both PUSCH and SRS's power is taken into consideration).

[0102] Figure 3'P CMAX,f,c ' indicates a 6-bit field, and P used in the calculation of the PH field above CMAX,f,c This shows an index related to the P.CMAX,f,c The index for this is associated with a specific UE transmit power level (dB). CMAX,f,c This may be called the maximum transmit power (maximum allowable transmit power) set for the UE for the serving cell c of carrier f. Hereinafter, P CMAX,f,c is simply P CMAX It may also be written as PCMAX, etc.

[0103] In Figure 3, 'P' may be a field relating to Power Management Maximum Power Reduction (P-MPR) or Maximum Permitted UE Output Power Reduction for serving cell c, or a field relating to Maximum Permitted Exposure (MPE). In Figure 3, 'MPE' may be a field relating to MPE. Fields such as 'P' and 'MPE' may be replaced with 'R' fields depending on the settings using higher-layer signaling to the UE.

[0104] The 'P' field is set to 0 if the P-MPR value applied to satisfy the MPE request is less than a specific P-MPR value (e.g., P-MPR_00) when the FR2 MPE reporting (upper layer parameter mpe-Reporting-FR2) is set and the serving cell is operating in FR2, and 1 otherwise.

[0105] Additionally, the 'P' field may indicate whether MPE reporting for FR2 is not configured, or whether power back-off is applied for power management if the serving cell operates on FR1. If power back-off is not applied for power management, the corresponding P field may be displayed. CMAX If the fields were supposed to have different values, the 'P' field will be set to 1.

[0106] The 'MPE' field may indicate the power backoff applied to satisfy the MPE requirement when FR2 MPE reporting (upper layer parameter mpe-Reporting-FR2) is set, the serving cell operates in FR2, and the 'P' field is set to 1. This field may indicate an index corresponding to the measured P-MPR value (e.g., in dB).

[0107] If FR2's MPE reporting is not configured, or if the serving cell is operating on FR1, or if the 'P' field is set to 0, then the R field (bits of R) may be present instead of the 'MPE' field.

[0108] NR also supports multiple entry PHR MAC CEs, which contain multiple data similar to the single entry (2 octets) described above. Multiple entry PHR MAC CEs may include PH fields for Primary Secondary Cells (PSCells) and Secondary Cells (SCells). PCells and PSCells may also be called Special Cells (SpCells).

[0109] Figure 4 shows an example of a multiple-entry PHR MAC CE in Rel.16 NR. Fields similar to those in Figure 3 will not be explained again. The 6-bit fields in Figure 4 containing the word 'PH' indicate the PH field for the corresponding type (e.g., types 1-3 described above) and cell.

[0110] The existence of a type 2PH field for the SpCell of other MAC entities may also be set by the higher-layer parameter phr-Type2OtherCell being true.

[0111] Figure 4'P CMAX,f,cThe 6-bit field containing the phrase ' is the P used in the calculation of the preceding PH field. CMAX,f,c P that shows CMAX,f,c This is a field. 'C' in Figure 4. i ' is a field that indicates whether the PH field of the serving cell corresponding to serving cell index i is included in the PHR. Note that Figure 4 shows the case where the maximum serving cell index is less than 8, and if it is 8 or greater, the MAC CE can show serving cells up to i=31, for example. i The field may include '.

[0112] Note that the numbers and P are attached to the "serving cell" in the PH field. CMAX,f,c The number assigned to the field does not necessarily represent the serving cell index; it may simply represent the position of the value within the MAC CE.

[0113] In Figure 4, 'V' indicates whether the PH value corresponding to the immediately following PH field is based on the actual transmission (V=0) or the reference format (V=1). PH based on the reference format may also be called virtual PH. Note that if V=1, the corresponding 'P CMAX,c Fields such as 'Field' and 'MPE' field may be omitted.

[0114] The network may send PHR configuration information to the UE regarding the conditions for triggering the PHR. This PHR configuration information may include, for example, a prohibit timer, a periodic timer, and a path loss change threshold (phr-Tx-PowerFactorChange). Higher-layer signaling may be used for this notification. The UE triggers the PHR if the PHR trigger conditions are met.

[0115] (Maximum transmission power) The maximum transmit power (maximum transmit power) of the carrier f of serving cell c at panel p. CMAXpanel,f,c,p This explains an example of the settings. CMAXpanel,f,c,p P CMAX,f,c,p ) may also be written as.

[0116] 《Option 0》 The UE may receive settings for the maximum transmit power per serving cell and per carrier (for example, settings similar to Rel.17) and determine the maximum transmit power per panel based on these settings. For example, if the maximum transmit power of carrier f of serving cell c is P CMAX,f,c The maximum transmit power P of each panel p is set as follows: CMAX,f,c,p P CMAX,f,c The decision may be made based on P CMAX,f,c and P CMAX,f,c,p The decision may be made based on the relationship with P. CMAX,f,c The relationship may be set in the UE by upper-layer signaling / physical layer signaling. Examples of the maximum transmit power per panel in this case are as follows:

[0117] 《Option 0-1》 The UE calculates the maximum transmit power P of panel p based on the following equation (8): CMAX,f,c,p You may decide that N is the number of panels instructed to transmit simultaneously. In other words, the maximum transmit power of each panel may be the same.

[0118] TIFF0007884669000008.tif13167

[0119] For example, if simultaneous multi-panel transmission is instructed, N=2. If single-panel transmission is instructed, N=1. Alternatively, N may be a value set by upper-layer signaling / physical-layer signaling from the network (base station) and at least one of the UE capabilities. Different values ​​may be applied to N for single-panel transmission and multi-panel transmission. Alternatively, N is the maximum number of panels that the UE supports in UL transmission (e.g., N=2), and the application of single-panel transmission or simultaneous multi-panel transmission does not need to be instructed by the network.

[0120] 《Option 0-2》 The UE calculates the maximum transmit power P of panel p based on the following equation (9): CMAX,f,c,p It may be determined that the sum of the maximum transmit powers of each panel p is the maximum transmit power of the UE. Np is a value for panel p and may differ for each panel. In other words, the maximum transmit power of each panel may differ.

[0121] TIFF0007884669000009.tif13167

[0122] Np may be a value set by upper-layer signaling / physical-layer signaling from the network (base station), and at least one of the UE capabilities. Different values ​​may be applied to Np for single-panel transmission and multi-panel transmission.

[0123] Options 0-3 The UE calculates the maximum transmit power P of panel p based on the following equation (10): CMAX,f,c,p It may be determined that the sum of the maximum transmit powers of each panel p is the maximum transmit power of the UE. In this case, the maximum transmit powers of each panel may be the same, different, or some panels may have the same maximum transmit power.

[0124] TIFF0007884669000010.tif13167

[0125] This clarifies the maximum transmit power on panel p, the maximum transmit power of all panels, and their relationships, allowing the UE to control simultaneous UL transmission of multiple panels using appropriate transmit power.

[0126] (Report on M-TRP PHR in Rel.17) In the iteration of the M-TRP PUSCH of Rel.17, if a PHR MAC CE is reported in slot n, the first PHR for the first TRP is reported as in Rel.16. The second PHR for the second TRP may be defined as follows: (1) to (3). (1) The second PHR is the actual PHR if the first PHR is the actual PHR and there is a repeat of PUSCH related to the second TRP in slot n. (2) If the first PHR is an actual PHR and not a PUSCH repeat slot n associated with the second TRP, then the second PHR is a virtual PHR. (3) If the first PHR is a virtual PHR, then the second PHR is a virtual PHR.

[0127] The virtual PHR may be calculated using the default power control parameters (p0, alpha(α), PL-RS, closedloopindex) for each TRP.

[0128] If the UE provides twoPHRMode in the active UL BWP b of the carrier f of serving cell c, and provides two SRS resource sets whose usage is set to "codebook" or "noncodebook" in srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2, then the UE provides two types of first power headroom reports as follows: (1) and (2), assuming that the UE provides a first type 1 PHR for the actual PUSCH iteration of the earliest starting PUSCH transmission in the slot associated with one of the SRS resource sets.

[0129] (1) If the UE sends a PUSCH repeat related to another SRS resource set in slot n, the UE provides a second Type 1 power headroom report for the first actual PUSCH repeat related to the other SRS resource set that overlaps with slot n. (2) Otherwise (if the conditions of (1) are not met), the UE provides a second Type 1 power headroom report for reference push transmissions associated with other SRS resource sets.

[0130] (UE ability, etc.) In this disclosure, “Panel” may refer to a value (or set of values) of UE capability, as in Rel. 17. “Panel” may also refer to a definition equivalent to that of other terms, such as “UE antenna group.”

[0131] The beam may represent Spatial Relation Information (SRI) (TCI). The TRP may refer to the CORESETPool / SRS resource set.

[0132] In simultaneous multi-panel transmission (STxMP), the following methods may be applied. • Single DCI (S-DCI) Space Division Multiplexing (SDM) scheme: Different layers / DMRS ports on a single PUSCH are precoded separately and transmitted simultaneously from different UE beams / panels. • S-DCI Frequency Division Multiplexing (FDM)-A scheme: Different portions of the frequency domain resources of a single pusher's transmission opportunity are transmitted from different UE beams / panels. • S-DCI FDM-B method: A method that transmits two push transmission opportunities for the same TB and the same / different RV from different UE beams / panels on non-overlapping frequency-domain resources and the same time-domain resources. • S-DCI SFN-based transmission method: Transmits the same PUSCH / DMRS simultaneously from two different UE beams / panels. • S-DCI Spatial Domain Repetition Scheme: Two Push transmit opportunities with different redundant versions (Redundancy Versions (RVs)) of the same TB are transmitted from two different UE beams / panels on the same time and frequency resources. • M-DCI method: A method of transmitting two overlapping PUSCHs (fully / partially overlapping in the time domain, fully / partially overlapping or not overlapping in the frequency domain) from two different UE beams / panels.

[0133] Simultaneous multi-panel transmission assumes multi-TPR, considering that one panel corresponds to one TRP. Therefore, in this disclosure, the PUSCH associated with the panel can also be referred to as the PUSCH associated with the TRP, and the PHR / power of the panel can be referred to as the PHR / power of the TRP.

[0134] In this disclosure, it is conceivable that the UE receives PUSCH / SRS on one panel and receives PUSCH / SRS on another panel using time resources that fully / partially overlap with the reception of PUSCH on another panel (simultaneous multi-panel reception).

[0135] In this disclosure, “single-panel transmission” may apply only if a PUSCH transmission with a single panel exists and there are no other PUSCH / SRS transmissions on other panels on time resources that completely / partially overlap with that PUSCH transmission. In this case, further consideration is needed as to how to handle PHR reporting, for example, in the case of PUSCH+SRS, one Type 1 PHR based on PUSCH and one Type 3 PHR based on SRS.

[0136] Alternatively, “single panel transmission” in this disclosure may also apply if there is a PUSCH transmission having a single panel and there is a PUCCH / SRS transmission having another panel that is in time resources that fully / partially overlap with the PUSCH transmission.

[0137] (Assuming simultaneous UL transmission across multiple panels) In the case of simultaneous multi-panel UL transmission, considering the limitations on maximum UL transmission power, at least one of the following assumptions 1-1 to 1-3 should be assumed.

[0138] [Assumption 1-1] The maximum UL transmit power for each panel is considered. The actual transmit power of PUSCH / PUCCH / SRS of panel p in serving cell c is assumed to be less than or equal to the maximum UL transmit power of panel p in serving cell c. That is, P panel_actual,c,p ≤P panel_max,c,p The following holds true. The maximum UL transmit power of panel p in serving cell c may be calculated using any of the above equations (8) to (10) for (maximum transmit power). Note that if the carrier is not specified, the carrier f element may be removed.

[0139] P panel_actual,c,pThis is the actual transmit power of serving cell c and panel p, and P panel_max,c,p This is the maximum UL transmit power of serving cell c and panel p.

[0140] [Assumption 1-2] The maximum UL transmit power per cell is considered. The sum of the actual transmit power of PUSCH / PUCCH / SRS from multiple panels of serving cell c is expected to be less than or equal to the maximum UL transmit power of serving cell c. That is, Σ p P panel_actual,c,p ≤P cell_max,c This holds true. Furthermore, the maximum UL transmit power of serving cell c is the value determined in Rel.17 (i.e., P CMAX,f,c ) is also acceptable. P panel_actual,c,p The actual transmit power of the serving cell c panel p, P cell_max,c This is the maximum UL transmit power of serving cell c.

[0141] [Assumptions 1-3] Both the maximum UL transmit power per panel and the maximum transmit power per cell may be considered. The transmit power may satisfy the conditions of both Assumption 1 and Assumption 2.

[0142] (Assuming single-panel UL transmission) If dynamic switching between single-panel and multi-panel simultaneous transmission is supported, then, considering the maximum UL transmit power limits, at least one of the following assumptions 2-1 and 2-2 is assumed.

[0143] [Scenario 2-1] The maximum UL transmit power for each panel is considered. The actual transmit power of PUSCH / PUCCH / SRS for single-panel transmission on panel p in serving cell c is assumed to be less than or equal to the maximum UL transmit power of panel p in serving cell c. That is, P panel_actual,c,p ≤P panel_max,c,p This holds true.

[0144] P panel_actual,c,pThis is the actual transmit power of serving cell c and panel p, and P panel_max,c,p This is the maximum UL transmit power of serving cell c and panel p.

[0145] [Assumption 2-2] The maximum UL transmit power for each cell is considered. The actual total transmit power of PUSCH / PUCCH / SRS from a single panel of serving cell c is expected to be less than or equal to the maximum UL transmit power of serving cell c. That is, P panel_actual,c,p ≤P cell_max,c The following holds true. Furthermore, the maximum UL transmit power of serving cell c is the value determined in Rel.17 (i.e., P CMAX,f,c ) is also acceptable.

[0146] P panel_actual,c,p This is the actual transmit power of panel p of serving cell c, and P cell_max,c This is the maximum UL transmit power of serving cell c.

[0147] Note that in the case of single-panel transmission, P panel_max,c,p , P cell_max,c If the conditions are the same, then assumptions 2-1 and 2-2 are the same.

[0148] (PHR trigger) In existing specifications (e.g., Rel.17), PHR may be triggered based on at least one of the following events / conditions: - When the PHR prohibit timer (phr-ProhibitTimer) expires / has expired, and the MAC entity has UL resources for new transmissions, and the path loss has changed above a predetermined threshold (phr-Tx-PowerFactorChange(dB)) for at least one reference signal used as a path loss reference for an activated Serving Cell corresponding to any MAC entity where the active DL BWP is not a dormant BWP since the last transmission of the PHR in that MAC entity. When the PHR's periodic timer (phr-PeriodicTimer) expires. • When the PHR's functionality is set / reconfigured by higher-layer signaling (however, this higher-layer signaling does not need to be used to disable the PHR's functionality). When the SCell corresponding to a configured MAC entity whose firstActiveDownlinkBWP-Id is not set to a dormant BWP is activated. When SCG is activated. Unless the SCG is deactivated, when a PSCell is added (i.e., when a new PSCell is added / modified). When the PHR prohibit timer (phr-ProhibitTimer) expires, and the MAC entity has a UL resource for new transmissions, and the following conditions are met for any activated Serving Cell corresponding to any MAC entity for which the UL has been set: - In this cell (the activated Serving Cell mentioned above), if there is an UL resource allocated for transmission / a PUCCH transmission, and the power backoff request for power management for this cell has changed above a predetermined threshold (phr-Tx-PowerFactorChange (dB)) since the last PHR transmission. When a SCell corresponding to any MAC entity with a UL set is switched from an activated dormant BWP to a non-dormant BWP. - When the upper layer parameter mpe-Reporting-FR2 is set and the MPE prohibit timer (mpe-ProhibitTimer) is not running. If, since the last PHR transmission in a MAC entity, the PMPR measurements applied to meet the FR2 MPE requirements are above a predetermined threshold (mpe-Threshold) for at least one active FR2 serving cell. - If, since the last submission of a PHR in a MAC entity, the PMPR measurements applied to meet the FR2's MPE requirements have changed above a predetermined threshold (phr-Tx-PowerFactorChange (dB)) for at least one active FR2 serving cell. In this case, the PHR may also be referred to as the "MPE P-MPR Report".

[0149] (analysis) <Analysis 1> As mentioned above, the application of Simultaneous multi-panel Tx (STxMP) to PUSCH is being considered. For example, if STxMP is configured for a serving cell, the event / condition that triggers PHR is not clear.

[0150] <Analysis 2> Furthermore, the cases in which simultaneous multi-panel transmission is applicable include single DCI (S-DCI) and multi-DCI (M-DCI) scenarios. In particular, in the multi-DCI case, considering non-ideal backhaul, the PHR reports for two TRPs may exist in separate MAC CEs. In that case, it is unclear whether the UE can transmit PHRs separately to the two TRPs.

[0151] Thus, if the control method for PHR is not clearly defined, transmission control may not be performed properly, potentially leading to a decrease in communication throughput.

[0152] Therefore, the inventors conceived a method for controlling the PHR according to the applicable scenario.

[0153] The embodiments of this disclosure will be described in detail below with reference to the drawings. Each wireless communication method according to the embodiments may be applied individually or in combination.

[0154] (Various substitutions, etc.) In this disclosure, "A / B" and "at least one of A and B" may be interpreted as mutually exclusive. In this disclosure, "A / B / C" may mean "at least one of A, B, and C".

[0155] In this disclosure, terms such as notice, activate, deactivate, indicate, select, configure, update, and determine may be interpreted interchangeably. In this disclosure, terms such as support, control, controllable, operate, and operable may be interpreted interchangeably.

[0156] In this disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher-layer parameters, fields, Information Elements (IE), settings, etc., may be interpreted interchangeably. In this disclosure, Medium Access Control elements (MAC Control Element (CE)), update commands, activation / deactivation commands, etc., may be interpreted interchangeably.

[0157] In this disclosure, the upper-layer signaling may be any or a combination thereof, such as Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and other messages (e.g., messages from the core network, such as positioning protocol messages (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages).

[0158] In this disclosure, MAC signaling may include, for example, MAC Control Elements (MAC CEs) and MAC Protocol Data Units (PDUs). Broadcast information may include, for example, Master Information Blocks (MIBs), System Information Blocks (SIBs), Remaining Minimum System Information (RMSIs), and Other System Information (OSIs).

[0159] In this disclosure, physical layer signaling may include, for example, Downlink Control Information (DCI) and Uplink Control Information (UCI).

[0160] In this disclosure, terms such as index, identifier (ID), indicator, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, and subset may be interpreted interchangeably.

[0161] In this disclosure, the terms used include: panel, UE panel, panel group, beam, beam group, precoder, Uplink (UL) transmit entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relationship, SRS Resource Indicator (SRI), Control Resource Set (CORESET), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., Demodulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control Channel (PUCCH) groups, PUCCH resource groups, resources (e.g., reference signal resources, SRS resources), resource sets (e.g., reference signal resource sets), CORESET pools, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, quasi-co-location (QCL), QCL assumptions, etc., may be interpreted interchangeably.

[0162] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information" may be interpreted as mutually exclusive as "a set of spatial relationship information," "one or more spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive.

[0163] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information" may be interpreted as mutually exclusive as "a set of spatial relationship information," "one or more spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive.

[0164] In this disclosure, multi-panel simultaneous transmission (simultaneous multi-panel transmission) and multi-panel simultaneous UL transmission (simultaneous multi-panel UL transmission) may be interpreted interchangeably. In this disclosure, supporting and being configured / instructed may be interpreted interchangeably. In this disclosure, loop, power control loop, power control loop index, closed loop, open loop, and power control adjustment state may be interpreted interchangeably. In this disclosure, transmit power and output power may be interpreted interchangeably.

[0165] The power limit in this disclosure may mean a limit by maximum transmit power. The PHR in this disclosure may mean an actual PHR, a virtual PHR, or both an actual and a virtual PHR, unless otherwise specified. The p and q in this disclosure may mean panel indices.

[0166] In this disclosure, multi-TRP (MTRP, M-TRP), multi-TRP system, multi-TRP transmission, and multi-PDSCH may be interpreted as mutually exclusive.

[0167] In this disclosure, "PHR," "PH," "PH field," and "PH value" may be interpreted interchangeably. Also, in this disclosure, "PH field" may be interpreted interchangeably with a PH field of a certain type (e.g., type 1 / 2 / 3 / X).

[0168] In this disclosure, the PHR MAC CE may include fields for each of the multiple serving cells (such as a PCMAX field and a P field).

[0169] Furthermore, in this disclosure, “PCMAX field / P-MPR value / powerbackoff (corresponding to / for / the PH field)” may be interpreted as “PCMAX field / P-MPR value / powerbackoff (corresponding to / for / the PUSCH transmission of the corresponding PH field).”

[0170] In this disclosure, P-MPR, P-MPR value, and power back-off may be interpreted interchangeably.

[0171] In this disclosure, UL transmission (UL Tx) / PHR related to panels and UL transmission (UL Tx) / PHR related to TRPs may be interpreted as mutually exclusive.

[0172] (Wireless communication method) <First Embodiment> The first embodiment corresponds to Analysis 1 and relates to events / conditions for triggering PHR in simultaneous multi-panel transmission of PUSCH.

[0173] In this disclosure, the simultaneous multi-panel transmission method of PUSCH can be any of the schemes described above. In the following description, different schemes may be applied for each option. Which scheme to apply for each option may be predefined by the specification, set by upper-layer signaling, or reported by UE capability.

[0174] For example, in single-DCI-based simultaneous multi-panel transmission, the triggering method / reporting (transmission) method for PHR may be the same as that used for repetition in single-DCI-based multi-TRP. In single-DCI-based simultaneous multi-panel transmission, ideal backhaul is considered, so UL transmissions are scheduled for both (each) of the multi-TRPs by the single DCI. Therefore, the same method as repetition in single-DCI-based multi-TRPs can be adopted.

[0175] On the other hand, in multi-DCI-based simultaneous multi-panel transmissions, individual PHR triggering / reporting (transmission) methods may be applied. In multi-DCI-based simultaneous multi-panel transmissions, non-ideal backhaul is considered, so UL transmissions corresponding to each TRP are scheduled by the DCI corresponding to each TRP. Therefore, each TRP may require its own PHR. In other words, triggering / reporting (transmission) of PHRs per TRP may be supported.

[0176] In this disclosure, the following phrases may be interpreted interchangeably: a serving cell being configured to perform simultaneous multi-panel transmissions of PUSCH, a serving cell being configured to perform two codebook (CB) / non-codebook (NCB) SRS resource sets, and a serving cell being configured to perform certain upper-layer parameters.

[0177] The event / condition for triggering a PHR for a serving cell may be at least one of the following options 1-2. Option 1 is particularly suitable for single-DCI-based simultaneous multi-panel transmissions, while option 2 may be applied to multi-DCI-based simultaneous multi-panel transmissions. The application of options 1 / 2 may also be switched based on upper-layer signaling / physical-layer signaling.

[0178] [Option 1] Option 1 describes the conditions under which a PHR is triggered for each serving cell. A PHR is triggered when a specific event occurs in a serving cell. The trigger condition / event for a PHR in a serving cell where simultaneous multi-panel PUSCH transmission is configured may be at least one of the following:

[0179] <Option 1.1> Option 1.1 concerns the PHR prohibit timer (phr-prohibitTimer).

[0180] Alt.1: phr-prohibitTimer may be set for each serving cell. If the phr-ProhibitTimer of a serving cell has expired, the PHR may be triggered. Alt.2:phr-prohibitTimer may be set for each panel / TRP. Alt.2-1: If all (e.g., two) Phr-ProhibitTimers per panel / TRP set in a serving cell have expired, the PHR may be triggered. Alt.2-2: If the phr-ProhibitTimer of either of the two panels / TRPs set in the serving cell has expired, the PHR may be triggered. Alt.2-3: If the phr-ProhibitTimer of one of the two panels / TRPs set up in the serving cell (for example, the first panel / TRP) has expired, the PHR may be triggered.

[0181] <Option 1.2> Option 1.2 concerns path loss (and its changes).

[0182] Alt.1: If the path loss in both (two) panel / TRP / reference signals of the serving cell has changed beyond a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Alt.2: If the path loss in either of the two panel / TRP / reference signals corresponding to the serving cell has changed beyond a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Alt.3: A PHR may be triggered if the path loss in one of the two panel / TRP / reference signals corresponding to the serving cell (e.g., the first panel / TRP / reference signal) has changed by a predetermined threshold (phr-Tx-PowerFactorChange). Variation: The predetermined threshold (phr-Tx-PowerFactorChange) may be set for each panel / TRP / reference signal.

[0183] <Option 1.3> Option 1.3 concerns the PHR periodic timer (phr-PeriodicTimer).

[0184] Alt.1: phr-PeriodicTimer may be set for each serving cell. If the phr-PeriodicTimer of a serving cell has expired, the PHR may be triggered. Alt.2:phr-PeriodicTimer may be set for each panel / TRP. Alt.2-1: If all (e.g., two) phr-PeriodicTimers per panel / TRP set in a serving cell have expired, the PHR may be triggered. Alt.2-2: If the phr-PeriodicTimer of either of the two panels / TRPs configured in the serving cell has expired, the PHR may be triggered. Alt.2-3: If the phr-PeriodicTimer of one of the two panels / TRPs set up in the serving cell (for example, the first panel / TRP) has expired, the PHR may be triggered.

[0185] <Option 1.4> Option 1.4 relates to Power-management Maximum Power Reduction (PMPR) (changes).

[0186] Alt.1: PMPR may be set for each serving cell. PHR may be triggered if the power backoff requested by the serving cell's power management (permitted by the PMPR corresponding to a particular serving cell, as defined by the specifications) has changed beyond a predetermined threshold (phr-Tx-PowerFactorChange). Alt.2: PMPR may be set for each panel / TRP. Alt.2-1: A PHR may be triggered if the power backoff requested by the power management of the serving cell has changed to a predetermined threshold (phr-Tx-PowerFactorChange) in both panels / TRPs corresponding to the serving cell. Alt.2-2: If the power backoff request by the power management of the serving cell has changed (has changed) in one of the two panels / TRPs corresponding to the serving cell, the PHR may be triggered. Alt.2-3: A PHR may be triggered if, in one of the two panels / TRPs corresponding to a serving cell (for example, the first panel / TRP), the power backoff requested by the serving cell's power management has changed beyond a predetermined threshold (phr-Tx-PowerFactorChange). Variation: The predetermined threshold (phr-Tx-PowerFactorChange) may be set for each panel / TRP.

[0187] <Option 1.5> Option 1.5 concerns the MPE prohibit timer (mpe-ProhibitTimer). If mpe-Reporting-FR2 is set, at least one of the following conditions may apply:

[0188] Alt.1:mpe-ProhibitTimer may be set for each serving cell. If the serving cell's mpe-ProhibitTimer is not running, the PHR may be triggered. Alt.2:mpe-ProhibitTimer may be set for each panel / TRP. Alt.2-1: If all (e.g., two) of the mpe-ProhibitTimers per panel / TRP set up in the serving cell are not running, the PHR may be triggered. Alt.2-2: If the mpe-ProhibitTimer of either of the two panels / TRPs configured for the serving cell is not running, the PHR may be triggered. Alt.2-3: If the mpe-ProhibitTimer of one of the two panels / TRPs configured on the serving cell (for example, the first panel / TRP) is not running, the PHR may be triggered.

[0189] <Option 1.6> Option 1.6 concerns PMPR for FR2 MPE. If mpe-Reporting-FR2 is configured, at least one of the following conditions may apply:

[0190] Alt.1: PMPR may be set for each serving cell. PHR may be triggered if the PMPR measurement applied to meet the FR2 MPE requirements specified in the specification is above a predetermined threshold (mpe-Threshold). Alt.2: PMPR may be set for each panel / TRP. Alt.2-1: If the PMPR measurement value in both panels / TRPs corresponding to the serving cell is above a predetermined threshold (mpe-Threshold), the PHR may be triggered. Alt.2-2: If the PMPR measurement value in any one of the two panels / TRPs corresponding to the serving cell is above a predetermined threshold (mpe-Threshold), the PHR may be triggered. Alt.2-3: If the PMPR measurement in one of the two panels / TRPs corresponding to the serving cell (e.g., the first panel / TRP) is equal to or greater than a predetermined threshold (mpe-Threshold), the PHR may be triggered. Variation: The predetermined threshold (mpe-Threshold) may be set for each panel / TRP.

[0191] <Option 1.7> Option 1.7 concerns PMPR (changes) for FR2 MPE. If mpe-Reporting-FR2 is set, at least one of the following conditions may apply:

[0192] Alt.1: PMPR may be set per serving cell. A PHR may be triggered if the PMPR measurement applied to meet the FR2 MPE requirements specified in the specification has changed by a predetermined threshold (phr-Tx-PowerFactorChange). Alt.2: PMPR may be set for each panel / TRP. Alt.2-1: If the PMPR measurement has changed by a predetermined threshold (phr-Tx-PowerFactorChange) in both panels / TRPs corresponding to the serving cell, the PHR may be triggered. Alt.2-2: If the PMPR measurement in one of the two panels / TRPs corresponding to the serving cell has changed to a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Alt.2-3: If the PMPR measurement in one of the two panels / TRPs corresponding to the serving cell (e.g., the first panel / TRP) has changed by a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Variation: The predetermined threshold (phr-Tx-PowerFactorChange) may be set for each panel / TRP.

[0193] [Option 2] Option 2 describes the conditions under which a PHR is triggered for each panel / TRP of a serving cell. A PHR is triggered when a specific event occurs in a certain panel / TRP of a serving cell. The trigger conditions / events for a PHR in a panel / TRP of a serving cell where simultaneous multi-panel PUSCH transmission is configured may be at least one of the following:

[0194] Alternative 1: The phr-prohibitTimer may be set for each panel / TRP. If the phr-prohibitTimer set for the panel / TRP has expired / has been expired, the PHR may be triggered. Alternative 2: If the path loss has changed more than the predetermined threshold (phr-Tx-PowerFactorChange) corresponding to the panel / TRP, the PHR may be triggered. Variation: The phr-Tx-PowerFactorChange may be set for each panel / TRP. Alternative 3: The phr-PeriodicTimer may be set for each panel / TRP. If the phr-PeriodicTimer set for the panel / TRP has expired / has been expired, the PHR may be triggered. Alternative 4: The PMPR may be set for each panel / TRP. If the required power back-off due to the power management of the panel / TRP has changed more than the predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Variation: The phr-Tx-PowerFactorChange may be set for each panel / TRP. Alternative 5: When mpe-Reporting-FR2 is set. The mpe-ProhibitTimer may be set for each panel / TRP. If the mpe-ProhibitTimer set for each panel / TRP is not running, the PHR may be triggered. Alternative 6: When mpe-Reporting-FR2 is set. The PMPR may be set for each panel / TRP. If the measured value of the PMPR applied to meet the requirements of the FR2 MPE specified in the specification is greater than or equal to the predetermined threshold (mpe-Threshold), the PHR may be triggered. Variation: mpe-Threshold may be set for each panel / TRP. Alt.7: When mpe-Reporting-FR2 is set. If the measured value of the PMPR has changed from a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered. Variation: The predetermined threshold (phr-Tx-PowerFactorChange) may be set for each panel / TRP.

[0195] According to the first embodiment described above, the UE can appropriately control the execution (trigger) of the PHR in the simultaneous multi-panel transmission of the PUSCH.

[0196] <Second Embodiment> The second embodiment corresponds to Analysis 2 and describes, with respect to simultaneous multi-panel transmission based on multi-DCI, particularly the MAC CE for the PHR.

[0197] In the present disclosure, the method of simultaneous multi-panel transmission of the PUSCH can apply each of the above-described schemes. For example, when multi-DCI-based PUSCH simultaneous multi-panel transmission is set for the serving cell, Scheme 5 described above may be applied.

[0198] In the present disclosure, that the serving cell is set for multi-DCI-based PUSCH simultaneous multi-panel transmission, that the serving cell is set for two codebook (CB) / non-codebook (NCB) SRS resource sets, that the serving cell is set for two CORESETPoolIndexes and the two CORESETPoolIndexes are associated with the two codebook (CB) / non-codebook (NCB) SRS resource sets, and that the serving cell is set for a certain upper layer parameter, may be mutually interchangeable.

[0199] In this disclosure, MAC CE for PHR, PHR MAC CE, single-entry PHR MAC CE, and MAC CE may be interpreted as interchangeable.

[0200] [Embodiment 2.1] Embodiment 2.1 describes a specific example of a MAC CE for PHR (PHR MAC CE). Figure 5 is a diagram illustrating the transmission of a PHR. The UE may receive a setting for a limit on the transmit power per panel / per cell if simultaneous uplink (UL) transmission from multiple panels is supported. As shown in Figure 5, based on the setting, the UE controls the transmission (reporting) of at least one of the Power Headroom (PHR) based on actual push transmissions (first PHR / actual PHR) and PHR independent of actual push transmissions (second PHR / virtual PHR). The limit may be the maximum UL transmit power, for example, the maximum UL transmit power per panel. The UE may also determine the maximum UL transmit power based on capability. Furthermore, at least one of the first PHR and the second PHR may be based on single-panel transmission.

[0201] PHR may be transmitted via MAC signaling using PUSCH. For example, PHR may be notified using the PHR MAC CE (Control Element) included in the MAC PDU.

[0202] NR supports single-entry PHR MAC CEs for primary cells (PCells).

[0203] Figures 6A-6D show an example of a MAC CE for a PHR according to a second embodiment. A single MAC CE (single-entry PHR MAC CE) may contain a PHR corresponding to one panel / TRP for a serving cell. Which panel / TRP's PHR is included in a single MAC CE can be distinguished by a different Logical Channel ID (LCID) or an indication in the MAC CE's fields. The number of bits for each field shown below are examples only.

[0204] As shown in Figure 6A, MAC CE may consist of one octet (=8 bits). 'R' represents a 1-bit reserved field, which is set to a value such as '0'. 'TRP ID' represents a 1-bit field, which is set to a value such as '0' / '1'.

[0205] 'PH (power headroom)' may represent a 6-bit field. This field may represent an index of PH for a serving cell. For example, as explained in Figures 3 and 4, this field may represent an index of PH for each type of cell (e.g., PCell / SpCell). This index of PH may be associated with a specific PH value (in decibels (dB)) (or level).

[0206] As shown in Figure 6B, the MAC CE may consist of 2 octets (=16 bits). The MAC CE may further consist of PMPR / P CMAX It may include fields related to [the subject].

[0207] In Figure 6B, 'PMPR' may represent a 2-bit field. This field may also be a field relating to Power Management Maximum Power Reduction (P-MPR) for serving cell c. CMAX' may represent a 6-bit field. This field is the P used in the calculation of the PH field above. CMAX,f,c An index related to the P may be shown. CMAX,f,c The index for this is associated with a specific UE transmit power level (dB). CMAX,f,c This may be referred to as the maximum transmit power (maximum allowable transmit power) set by the UE for the serving cell c of carrier f. In this disclosure, P CMAX,f,c is simply P CMAX It may also be written as PCMAX, etc.

[0208] Furthermore, as shown in Figure 6C-D, the MAC CE may include a 'V' field instead of 'R'. 'V' may represent a 1-bit field. This field indicates whether the reported PHR is an actual PHR or a virtual PHR. For example, if this field is set to a value of '0', it indicates that the reported PHR is an actual PHR, and if it is set to a value of '1', it indicates that the reported PHR is a virtual PHR.

[0209] Note that the MAC CE shown in Figure 6 is merely an example and can be appropriately replaced with the MAC CEs in Figures 3 and 4 described above.

[0210] [Embodiment 2.2] Embodiment 2.2 describes the transmission conditions for the PHR MAC CE described above.

[0211] If a MAC CE in a serving cell contains PHRs corresponding to one or two panels / TRPs, the UE may control the transmission of that MAC CE based on the conditions shown below. Option 1 describes the condition where a MAC CE contains a PHR corresponding to one panel / TRP, and Option 2 describes the condition where a MAC CE contains PHRs corresponding to two panels / TRPs.

[0212] <Option 1> In a serving cell, when one MAC CE contains a PHR corresponding to one panel / TRP (TRP#X), the UE may control the transmission of the MAC CE based on at least one of the above conditions. That is, the MAC CE may be controlled for transmission based on at least one of the following conditions.

[0213] · When the MAC entity has UL resources associated with the corresponding TRP (TRP#X), the MAC CE may be transmitted to the corresponding TRP (TRP#X).

[0214] · When the MAC entity has UL resources associated with the corresponding TRP (TRP#X) and also has UL resources associated with another TRP (TRP#Y), the MAC CE may be controlled for transmission according to any one of Alt.1 - 3 below. Alt.1: The MAC CE is transmitted only to the corresponding TRP (TRP#X). Alt.2: The MAC CE is transmitted to the corresponding TRP (TRP#X) and also to another TRP (TRP#Y). Alt.3: Whether the MAC CE is transmitted to either TRP or both TRPs may depend on the UE implementation.

[0215] · When the MAC entity has UL resources associated with another TRP (TRP#Y), the MAC CE may be controlled for transmission according to any one of Alt.1 - 3 below. Alt.1: The MAC CE is transmitted only to the other TRP (TRP#Y). Alt.2: The MAC CE is not transmitted. Alt.3: Whether the MAC CE is transmitted may depend on the UE implementation.

[0216] <Option 2> If a serving cell contains a MAC CE with PHRs corresponding to two panels / TRPs (TRP#X), the UE may control the transmission of that MAC CE based on at least one of the above conditions. In other words, the MAC CE may control its transmission based on at least one of the following conditions:

[0217] If a MAC entity has UL resources associated with both (two) TRPs (TRP#X, #Y), the MAC CE may be controlled to transmit according to one of the following Alt.1-4. Alt.1: MAC CE is sent to only one TRP (either TRP#X or #Y). Which TRP MAC CE is sent to is up to the UE implementation. Alt.2: MAC CE is sent to only one TRP (either TRP#X or #Y). The TRP to which MAC CE is sent may be selected by a predetermined rule (defined by the specification) / network configuration (configuration by upper-layer signaling / physical layer signaling / instruction). Alt.3: MAC CE is sent to both (two) TRPs (TRP#X, #Y). Alt.4: Whether MAC CE is sent to one TRP (either TRP#X or #Y) or to both TRPs (TRP#X, #Y) is up to the UE implementation.

[0218] According to the second embodiment described above, the UE can properly transmit / report the PHR using MAC CE.

[0219] <Supplement> [Notification of information to UE] In the embodiments described above, notification of any information from a Network (NW) (e.g., a Base Station (BS)) to a UE (in other words, reception of any information from a BS at the UE) may be performed using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0220] If the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new Logical Channel ID (LCID) not defined in existing standards in the MAC subheader.

[0221] If the above notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble the Cyclic Redundancy Check (CRC) bits assigned to the DCI, or the format of the DCI.

[0222] Furthermore, the notification of any information to the UE in the above-described embodiment may be periodic, semi-persistent, or aperiodic.

[0223] [Notification of information from UE] In the embodiments described above, notification of any information from the UE (to the NW) (in other words, transmission / reporting of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signals), or a combination thereof.

[0224] If the above notification is made by a MAC CE, the MAC CE may be identified by the inclusion of a new LCID, not specified in existing standards, in the MAC subheader.

[0225] If the above notice is issued by the UCI, the notice may be sent using PUCCH or PUSCH.

[0226] Furthermore, the notification of any information from the UE in the above-described embodiments may be periodic, semi-persistent, or aperiodic.

[0227] [Regarding the application of each embodiment] At least one of the embodiments described above may be applied if certain conditions are met. These conditions may be specified in a standard or notified to the UE / BS using upper-layer signaling / physical layer signaling.

[0228] At least one of the embodiments described above may apply only to a UE that has reported or supports a particular UE capability.

[0229] The specific UE capability may represent at least one of the following: • To support specific processing / operation / control / information for at least one of the above embodiments. • The UE must support simultaneous transmission and reception across multiple panels. • The UE will support reporting / transmitting PHRs related to simultaneous multi-panel transmission and reception. • The UE must support per-panel or per-cell power limits for simultaneous multi-panel transmissions. • The UE must support per-panel or per-cell power limits for single-panel transmissions (if simultaneous multi-panel transmissions are supported). • Support for the UE to report two PHRs for two panels for a single serving cell.

[0230] Furthermore, the above-mentioned specific UE capabilities may be capabilities that apply across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination thereof, such as cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SCS), or capabilities per feature set (FS) or feature set per component-carrier (FSPC).

[0231] Furthermore, the specific UE capabilities described above may be capabilities that apply across all duplexing schemes (common to all duplexing schemes), or they may be capabilities specific to each duplexing scheme (e.g., Time Division Duplex (TDD), Frequency Division Duplex (FDD)).

[0232] Furthermore, at least one of the embodiments described above may be applied when the UE is configured / activated / triggered by upper layer signaling / physical layer signaling to configure / activate specific information (or perform the actions of the embodiments described above) related to the embodiments described above. For example, such specific information may be information indicating the activation of PHR reporting / transmission (triggering a PHR), or any RRC parameters for a particular release (e.g., Rel. 18 / 19).

[0233] If the UE does not support at least one of the above-mentioned specific UE capabilities or does not have the above-mentioned specific information configured, the behavior of, for example, Rel.15 / 16 may be applied.

[0234] (Note) With regard to one embodiment of this disclosure (the first embodiment), the following invention is added. [Note 1] A transmitter unit that transmits a physical uplink shared channel (PUSCH) using simultaneous uplink (UL) transmission from multiple panels, A terminal having a control unit that controls the triggering of power headroom (PHR) based on the aforementioned PUSCH transmission based on specific conditions. [Note 2] The aforementioned specific conditions pertain to the terminal described in Appendix 1, relating to the PHR or maximum permissible exposure (MPE) prohibition timer. [Note 3] The aforementioned specific conditions relate to changes in the path loss or power management maximum power reduction (PMPR) of the corresponding reference signal, as described in Appendix 1 or Appendix 2 for the terminal. [Note 4] The control unit is a terminal according to any one of the appendices 1 to 3, which controls the triggering of the PHR for each serving cell or panel.

[0235] (Note) With regard to one embodiment of this disclosure (the second embodiment), the following invention is added. [Note 1] If simultaneous uplink (UL) transmission from multiple panels is supported, the transmitter transmits a Medium Access Control Control Element (MAC CE) including the power headroom (PHR) per serving cell or per panel, A terminal having a control unit that controls the transmission of the MAC CE based on specific conditions. [Note 2] The terminal as described in Appendix 1, wherein the MAC CE includes at least one field relating to maximum power and a field indicating that it is an actual PHR or a virtual PHR. [Note 3] The aforementioned specific conditions apply to the terminals described in Appendix 1 or Appendix 2, based on the presence or absence of UL resources associated with the corresponding panel. [Note 4] The terminal according to any one of Appendix 1 to 3, wherein the control unit determines which panel transmits the MAC CE based on the presence or absence of UL resources associated with the corresponding panel.

[0236] (Wireless communication system) The configuration of a wireless communication system according to one embodiment of this disclosure will be described below. In this wireless communication system, communication is performed using any or a combination thereof of the wireless communication methods according to the above embodiments of this disclosure.

[0237] Figure 7 shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 (which may also be simply called system 1) may be a system that implements communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc., as specified by the Third Generation Partnership Project (3GPP).

[0238] Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and so on.

[0239] 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.

[0240] The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity where both MN and SN are NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0241] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) located within the macrocell C1 that form a small cell C2 that is narrower than the macrocell C1. User terminals 20 may be located within at least one cell. The arrangement and number of each cell and user terminal 20 are not limited to the configuration shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

[0242] 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).

[0243] Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). A macrocell C1 may be included in FR1, and a small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may fall in a frequency band higher than FR2.

[0244] Furthermore, the user terminal 20 may communicate using at least one of the following methods at each CC: Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0245] Multiple base stations 10 may be connected by wire (e.g., optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, if NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is the upstream station, may be called an Integrated Access Backhaul (IAB) donor, and base station 12, which is the relay station, may be called an IAB node.

[0246] Base station 10 may be connected to the core network 30 via other base stations 10 or directly. The core network 30 may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0247] The core network 30 may include network functions (NF) such as User Plane Function (UPF), Access and Mobility Management Function (AMF), Session Management Function (SMF), Unified Data Management (UDM), Application Function (AF), Data Network (DN), Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Multiple functions may be provided by a single network node. Furthermore, communication with an external network (e.g., the Internet) may occur via the DN.

[0248] The user terminal 20 may be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0249] In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access scheme may be used. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc., may be used in at least one of the downlink (DL) and uplink (UL).

[0250] The wireless access method may also be called a waveform. In wireless communication system 1, other wireless access methods (for example, other single-carrier transmission methods, other multi-carrier transmission methods) may be used for the UL and DL wireless access methods.

[0251] In the wireless communication system 1, a Physical Downlink Shared Channel (PDSCH), a Broadcast Channel (PBCH), or a Physical Downlink Control Channel (PDCCH) may be used as the downlink channel, shared by each user terminal 20.

[0252] Furthermore, in the wireless communication system 1, the uplink channel may include a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Physical Random Access Channel (PRACH), or the like, all of which are shared by each user terminal 20.

[0253] User data, higher-layer control information, and System Information Blocks (SIBs) are transmitted via PDSCH. User data and higher-layer control information may also be transmitted via PUSCH. Furthermore, Master Information Blocks (MIBs) may be transmitted via PBCH.

[0254] Lower-layer control information may be transmitted by PDCCH. The lower-layer control information may include, for example, Downlink Control Information (DCI) which includes scheduling information for at least one of PDSCH and PUSCH.

[0255] Furthermore, the DCI that schedules PDSCH may be called a DL assignment or DL ​​DCI, and the DCI that schedules PUSCH may be called a UL grant or UL DCI. Furthermore, PDSCH may be interpreted as DL data, and PUSCH may be interpreted as UL data.

[0256] PDCCH detection may utilize a Control Resource Set (CORESET) and a search space. A CORESET corresponds to the resources used to search for DCIs. A search space corresponds to the search area and search method for PDCCH candidates. A single CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with a particular search space based on the search space configuration.

[0257] A single search space may correspond to one or more PDCCH candidates corresponding to aggregation levels. One or more search spaces may be referred to as a search space set. In this disclosure, "search space," "search space set," "search space configuration," "search space set configuration," "CORESET," and "CORESET configuration" may be interpreted interchangeably.

[0258] PUCCH may transmit uplink control information (UCI) which includes at least one of the following: channel state information (CSI), delivery acknowledgment (e.g., Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). PRACH may transmit a random access preamble for establishing a connection with the cell.

[0259] In this disclosure, downlinks, uplinks, etc., may be expressed without the prefix "link." Also, the prefix "physical" may be omitted when describing various channels.

[0260] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc., may be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc., may be transmitted.

[0261] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS / PBCH block, SS Block (SSB), etc. SS, SSB, etc., may also be called reference signals.

[0262] Furthermore, in the wireless communication system 1, the Uplink Reference Signal (UL-RS) may transmit the Sounding Reference Signal (SRS), Demodulation Reference Signal (DMRS), etc. The DMRS may also be called the User-Specific Reference Signal (UE-specific Reference Signal).

[0263] (base station) Figure 8 shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of the control unit 110, transceiver unit 120, transceiver antenna 130, and transmission line interface 140 may be provided.

[0264] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0265] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, control circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0266] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc., using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may also perform call processing of communication channels (setting, releasing, etc.), status management of the base station 10, management of radio resources, etc.

[0267] The transmitting / receiving unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting / receiving unit 120 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0268] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 1211 and an RF unit 122. The receiving unit may consist of a receiving processing unit 1212, an RF unit 122 and a measuring unit 123.

[0269] The transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0270] The transmitting / receiving unit 120 may transmit the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 may also receive the uplink channel, uplink reference signal, etc.

[0271] The transmitting / receiving unit 120 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0272] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform processing on data and control information acquired from the control unit 110, for example, at the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), the Medium Access Control (MAC) layer (e.g., HARQ retransmission control), etc., to generate a bit sequence to be transmitted.

[0273] The transmitting / receiving unit 120 (transmission processing unit 1211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0274] The transmitting / receiving unit 120 (RF unit 122) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 130.

[0275] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc., on the radio frequency band signal received by the transmitting / receiving antenna 130.

[0276] The transmitting / receiving unit 120 (receiving processing unit 1212) may apply reception processing to the acquired baseband signal, such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0277] The transmitting / receiving unit 120 (measurement unit 123) may perform measurements related to the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), reception quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0278] The transmission path interface 140 may send and receive signals (backhaul signaling) with devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0279] In this disclosure, the transmitting and receiving units of the base station 10 may consist of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0280] The transmitting / receiving unit 120 may also receive a physical uplink shared channel (PUSCH) transmitted from a terminal using simultaneous uplink (UL) transmission from the multi-panel. The transmitting / receiving unit 120 may also transmit setting information for controlling the triggering of power headroom (PHR) based on the PUSCH transmission.

[0281] The transmitting / receiving unit 120 may receive a Medium Access Control Control Element (MAC CE) including the power headroom (PHR) per serving cell or per panel if simultaneous uplink (UL) transmission from multiple panels is supported.

[0282] The control unit 110 may control the reception of the MAC CE determined by the terminal based on specific conditions.

[0283] (User terminal) Figure 9 shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that one or more of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0284] In this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each part described below may be omitted.

[0285] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field related to this disclosure.

[0286] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc., using the transmitting / receiving unit 220 and the transmitting / receiving antenna 230. The control unit 210 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transmitting / receiving unit 220.

[0287] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 can be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common understanding in the art relating to this disclosure.

[0288] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or it may be composed of a transmitting unit and a receiving unit. The transmitting unit may consist of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may consist of a receiving processing unit 2212, an RF unit 222 and a measuring unit 223.

[0289] The transmitting and receiving antenna 230 can be composed of an antenna described based on common understanding in the art relating to this disclosure, such as an array antenna.

[0290] The transmitting / receiving unit 220 may receive the downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 220 may also transmit the uplink channel, uplink reference signal, etc.

[0291] The transmitting / receiving unit 220 may form at least one of the transmitting beam and the receiving beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like.

[0292] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc., on data and control information acquired from the control unit 210, etc., to generate a bit sequence to be transmitted.

[0293] The transmitting / receiving unit 220 (transmission processing unit 2211) may perform transmission processing on the bit sequence to be transmitted, such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion, and output a baseband signal.

[0294] Whether or not to apply DFT processing may be based on the transform precoding settings. The transmitting / receiving unit 220 (transmission processing unit 2211) may perform DFT processing as part of the transmission process to transmit a channel (for example, PUSCH) using a DFT-s-OFDM waveform if transform precoding is enabled for that channel, or it may not perform DFT processing as part of the transmission process if transform precoding is not enabled for that channel.

[0295] The transmitting / receiving unit 220 (RF unit 222) may perform modulation, filtering, amplification, etc., of the baseband signal to the radio frequency band and transmit the signal in the radio frequency band via the transmitting / receiving antenna 230.

[0296] 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.

[0297] The transmitting / receiving unit 220 (receiving processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.

[0298] The transmitting / receiving unit 220 (measuring unit 223) may perform measurements related to the received signal. For example, the measuring unit 223 may perform RRM measurement, CSI measurement, etc., based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0299] The measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources. Channel measurement resources may be, for example, Non Zero Power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources. Interference measurement resources may be at least one of the following: an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. CSI-IM may also be called CSI-Interference Management (IM), and may be interpreted interchangeably with Zero Power (ZP) CSI-RS. In this disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc., may be interpreted interchangeably.

[0300] In this disclosure, the transmitting and receiving units of the user terminal 20 may consist of at least one of a transmitting / receiving unit 220 and a transmitting / receiving antenna 230.

[0301] The transmitting / receiving unit 220 may also transmit a physical uplink shared channel (PUSCH) using simultaneous uplink (UL) transmission from the multi-panel.

[0302] The transmitting / receiving unit 220 may transmit a Medium Access Control Control Element (MAC CE) including the power headroom (PHR) per serving cell or per panel if simultaneous uplink (UL) transmission from multiple panels is supported.

[0303] The control unit 210 may control the triggering of the power headroom (PHR) based on the PUSCH transmission based on specific conditions. The specific conditions relate to the PHR or the maximum permissible exposure (MPE) disable timer. The specific conditions relate to the path loss of the corresponding reference signal or a change in the power management maximum power reduction (PMPR). The control unit 210 may control the triggering of the PHR on a per-serving cell or per-panel basis.

[0304] The control unit 210 may control the transmission of the MAC CE based on specific conditions. The MAC CE may include at least one of a field relating to maximum power and a field indicating whether it is an actual PHR or a virtual PHR. The specific conditions may be based on the presence or absence of UL resources associated with the corresponding panel. The control unit 210 may determine which panel to transmit the MAC CE to based on the presence or absence of UL resources associated with the corresponding panel.

[0305] (Hardware configuration) The block diagrams used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may also be realized by combining the above one device or the above multiple devices with software.

[0306] Here, functions include, but are not limited to, judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission may be called a transmitting unit or transmitter. In all cases, as mentioned above, the method of implementation is not particularly limited.

[0307] For example, a base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 10 is a diagram showing an example of the hardware configuration of a base station and user terminal according to one embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0308] In this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or it may be configured to omit some of the devices.

[0309] For example, although only one processor 1001 is shown in the diagram, there may be multiple processors. Furthermore, processing may be performed by one processor, or by two or more processors simultaneously, sequentially, or by other means. Note that processor 1001 may be implemented using one or more chips.

[0310] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, which allows the processor 1001 to perform calculations and control communication via the communication device 1004, or to control at least one of the reading and writing of data in the memory 1002 and storage 1003.

[0311] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, at least a part of the control unit 110 (210) and the transmitting / receiving unit 120 (220) described above may be implemented by the processor 1001.

[0312] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and executes various processes accordingly. The program used is one that causes the computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be implemented similarly.

[0313] Memory 1002 is a computer-readable recording medium and may consist of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. Memory 1002 may also be called a register, cache, or main memory. Memory 1002 can store executable programs (program code), software modules, etc., for carrying out a wireless communication method according to one embodiment of this disclosure.

[0314] Storage 1003 is a computer-readable recording medium and may consist of at least one of the following: a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital multipurpose disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be called an auxiliary storage device.

[0315] The communication device 1004 is hardware (transmitting / receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, duplexer, filter, frequency synthesizer, etc., in order to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the above-mentioned transmitting / receiving unit 120 (220), transmitting / receiving antenna 130 (230), etc., may be implemented by the communication device 1004. The transmitting / receiving unit 120 (220) may be implemented with physically or logically separated implementations of a transmitting unit 120a (220a) and a receiving unit 120b (220b).

[0316] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, light-emitting diode (LED) lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0317] Furthermore, each device, such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0318] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and some or all of each functional block may be implemented using such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0319] (modified version) In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Also, a signal may be a message. A reference signal may be abbreviated as RS and may be called a pilot, pilot signal, etc., depending on the applicable standard. Also, a component carrier (CC) may be called a cell, frequency carrier, carrier frequency, etc.

[0320] A wireless frame may consist of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a wireless frame may be called a subframe. Furthermore, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0321] Here, the neuralelogy may be communication parameters applied to at least one of the transmission and reception of a signal or channel. The neuralelogy may be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, or specific windowing processes performed by the transceiver in the time domain.

[0322] A slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols or Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols). Alternatively, a slot may be a time unit based on neurology.

[0323] A slot may include multiple mini-slots. Each mini-slot may consist of one or more symbols in the time domain. Mini-slots may also be called sub-slots. Mini-slots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (PUSCH) mapping type B.

[0324] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Wireless frames, subframes, slots, minislots, and symbols may each be referred to by different names. Furthermore, the units of time such as frames, subframes, slots, minislots, and symbols in this disclosure may be interpreted as interchangeable.

[0325] For example, one subframe may be called TTI, multiple consecutive subframes may be called TTI, or one slot or one mini-slot may be called TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Note that the unit representing TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0326] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each user terminal to allocate wireless resources (such as the frequency bandwidth and transmission power available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0327] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0328] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0329] A TTI with a time length of 1 ms may also be called a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, or a slot. A TTI shorter than a normal TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini slot, a sub slot, or a slot.

[0330] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0331] A Resource Block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0332] Furthermore, an RB may contain one or more symbols in the time domain and may have the length of one slot, one minislot, one subframe, or one TTI. Each TTI, subframe, etc., may consist of one or more resource blocks.

[0333] One or more RBs may also be called Physical RBs (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0334] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0335] A Bandwidth Part (BWP) (also called a partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a given neurology in a given carrier. Here, the common RBs may be identified by an index of the RBs relative to the carrier's common reference point. PRBs may be defined and numbered within a BWP.

[0336] A BWP may include UL BWPs (BWPs for UL) and DL BWPs (BWPs for DL). One or more BWPs may be configured within a single carrier for a UE.

[0337] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0338] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative examples. For instance, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots within a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0339] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a predetermined value, or corresponding other information. For example, wireless resources may be indicated by a predetermined index.

[0340] The names used for parameters and other elements in this disclosure are not restrictive in any way. Furthermore, mathematical formulas and other elements that use these parameters may differ from those expressly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0341] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0342] Furthermore, information, signals, etc., can be output from upper layers to lower layers and from lower layers to upper layers, or to at least one of the two. Information, signals, etc., may also be input and output via multiple network nodes.

[0343] Input and output information and signals may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals may be overwritten, updated, or appended to. Output information and signals may be deleted. Input information and signals may be transmitted to other devices.

[0344] Information notification is not limited to the embodiments described herein and may be carried out by other means. For example, information notification in this disclosure may be carried out by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof).

[0345] Physical layer signaling may also be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. RRC signaling may also be called RRC messages, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc. MAC signaling may also be communicated using, for example, MAC Control Element (CE).

[0346] Furthermore, notification of the specified information (for example, notification that "X is the case") is not limited to explicit notification, but may also be made implicitly (for example, by not notifying the specified information or by notifying other information).

[0347] The determination may be made by a value represented by 1 bit (0 or 1), by a boolean value represented as true or false, or by a numerical comparison (for example, a comparison with a predetermined value).

[0348] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0349] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0350] The terms “system” and “network” as used in this disclosure may be used interchangeably. “Network” may also mean the equipment included in the network (e.g., base stations).

[0351] In this disclosure, terms such as “precoding,” “precoder,” “weight (precoding weight),” “quasi-co-location (QCL),” “transmission configuration indication state (TCI state),” “spatial relation,” “spatial domain filter,” “transmit power,” “phase rotation,” “antenna port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” and “receiving entity” may be used interchangeably.

[0352] In this disclosure, "antenna port" may be interpreted interchangeably with "antenna port for any signal / channel" (e.g., a Demodulation Reference Signal (DMRS) port). In this disclosure, "resource" may be interpreted interchangeably with "resource for any signal / channel" (e.g., a reference signal resource, an SRS resource, etc.). Resources may include time / frequency / code / spatial / power resources. Furthermore, a spatial domain transmit filter may include at least one of a spatial domain transmit filter and a spatial domain receive filter.

[0353] The above group may include, for example, at least one of the following: a spatial relationship group, a code division multiplexing (CDM) group, a reference signal (RS) group, a control resource set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, or a panel group.

[0354] Furthermore, in this disclosure, beam, SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, Codeword (CW), Transport Block (TB), RS, etc., may be interpreted as being interchangeable.

[0355] Furthermore, in this disclosure, TCI state, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, joint TCI state, etc., may be interpreted interchangeably.

[0356] Furthermore, in this disclosure, terms such as "QCL," "QCL assumption," "QCL relationship," "QCL type information," "QCL properties," "specific QCL type (e.g., type A, type D) properties," and "specific QCL type (e.g., type A, type D)" may be interpreted as interchangeable.

[0357] In this disclosure, terms such as index, identifier (ID), indicator, indication, and resource ID may be interpreted interchangeably. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc., may be interpreted interchangeably.

[0358] Furthermore, the spatial relationship information Identifier (ID) (TCI state ID) and spatial relationship information (TCI state) may be interpreted as mutually exclusive. "Spatial relationship information (TCI state)" may be interpreted as mutually exclusive as "a set of spatial relationship information (TCI state)," "one or more spatial relationship information," etc. TCI state and TCI may be interpreted as mutually exclusive. Spatial relationship information and spatial relationship may be interpreted as mutually exclusive.

[0359] In this disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0360] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0361] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform a control / operation based on said information.

[0362] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0363] A mobile station may also be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate term.

[0364] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may also be a device mounted on a moving object, the moving object itself, etc.

[0365] The term "mobile object" refers to any movable object, regardless of its speed, and naturally includes cases where the mobile object is stationary. Examples of such mobile objects include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and items carried on them. Furthermore, such mobile objects may be autonomously driven objects operating based on operational commands.

[0366] The mobile entity may be a vehicle (e.g., a car, an airplane), an unmanned mobile entity (e.g., a drone, an autonomous vehicle), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0367] Figure 11 shows an example of a vehicle according to one embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, a pneumatic pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0368] The drive unit 41 consists of, for example, at least one of an engine, a motor, or an engine-motor hybrid. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.

[0369] The electronic control unit 49 consists of a microprocessor 61, memory (ROM, RAM) 62, and communication ports (e.g., input / output (IO) ports) 63. Signals from various sensors 50-58 installed in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be called an Electronic Control Unit (ECU).

[0370] Signals from various sensors 50-58 include current signals from current sensor 50 for sensing motor current, rotational speed signals of front wheels 46 / rear wheels 47 acquired by rotational speed sensor 51, air pressure signals of front wheels 46 / rear wheels 47 acquired by air pressure sensor 52, vehicle speed signals acquired by vehicle speed sensor 53, acceleration signals acquired by acceleration sensor 54, accelerator pedal depression signal of accelerator pedal 43 acquired by accelerator pedal sensor 55, brake pedal depression signal of brake pedal 44 acquired by brake pedal sensor 56, operation signals of shift lever 45 acquired by shift lever sensor 57, and detection signals for detecting obstacles, vehicles, pedestrians, etc., acquired by object detection sensor 58.

[0371] The information service unit 59 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, displays, television, and radio, and one or more ECUs that control these devices. The information service unit 59 uses information acquired from external devices via a communication module 60 or the like to provide various types of information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40.

[0372] The information service unit 59 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0373] The driver assistance system unit 64 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driver assistance functions or autonomous driving functions.

[0374] The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 sends and receives data (information) via the communication port 63 to the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 provided in the vehicle 40.

[0375] The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the base station 10 or the user terminal 20 described above. Alternatively, the communication module 60 may be, for example, at least one of the base station 10 and the user terminal 20 (it may function as at least one of the base station 10 and the user terminal 20).

[0376] The communication module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 59. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above input.

[0377] The communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 installed in the vehicle. The information service unit 59 may also be called an output unit, which outputs information (for example, it outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60).

[0378] Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axle 48, various sensors 50-58, etc., which are provided in the vehicle 40.

[0379] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channel and downlink channel may be interpreted as sidelink channel.

[0380] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station 10 may be configured to have the same functions as the user terminal 20 described above.

[0381] In this disclosure, operations performed by a base station may, in some cases, be performed by its upper node. In a network including one or more network nodes with base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME), a Serving Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0382] Each aspect / embodiment described in this disclosure may be used individually, in combination, or switched between during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described in this disclosure may be rearranged in order, provided they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order and are not limited to that specific order.

[0383] Each aspect / embodiment described in this disclosure includes Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (where x is, for example, an integer or decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM®), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi®), IEEE 802.16 (WiMAX®), and IEEE This may apply to systems utilizing 802.20, Ultra-WideBand (UWB), Bluetooth®, or other appropriate wireless communication methods, as well as next-generation systems that are extended, modified, created, or defined based on these. It may also apply to combinations of multiple systems (e.g., a combination of LTE or LTE-A and 5G).

[0384] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0385] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, the references to the first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.

[0386] The term “determining” as used in this disclosure may encompass a wide variety of actions. For example, “determining” may be considered to include judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in tables, databases, or other data structures), ascertaining, etc.

[0387] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" things like receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory).

[0388] Furthermore, "judgment (decision)" may be considered as "judging (deciding)" something like resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment (decision)" may be considered as "judging (deciding)" something about an action. In this disclosure, "judgment (decision)" may be interpreted interchangeably with the actions described above.

[0389] Furthermore, in this disclosure, “determine / determining” may be interpreted as “assume / assuming,” “expect / expecting,” or “consider / considering.” In addition, in this disclosure, “not assuming that…” may be interpreted as “assuming that…”

[0390] In this disclosure, “expect” may be interpreted as “be expected.” For example, “expect(s) …” (where “...” may be expressed as a that clause, an infinitive, etc.) may be interpreted as “be expected ….” “does not expect …” may be interpreted as “be not expected ….” Furthermore, “An apparatus A is not expected …” may be interpreted as “An apparatus B other than apparatus A does not expect …” (for example, if apparatus A is a UE, apparatus B may be a base station).

[0391] The term "maximum transmit power" as used in this disclosure may mean the maximum transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.

[0392] As used in this disclosure, the terms “connected,” “coupled,” and any variations thereof mean any direct or indirect connection or coupling between two or more elements, and may include one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be replaced with “access.”

[0393] In this disclosure, when two elements are connected, they can be considered to be “connected” or “coupled” to each other using one or more wires, cables, printed electrical connections, etc., and, in some non-exclusive and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, or optical domain (both visible and invisible).

[0394] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0395] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0396] In this disclosure, if articles are added by translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0397] In this disclosure, terms such as "less than or equal to," "less than," "greater than or equal to," "more than," and "equal to" may be interpreted interchangeably. In addition, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees. Furthermore, in this disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "early," "slow," "wide," and "narrow" may be interpreted interchangeably, not limited to the positive, comparative, and superlative degrees, by adding "i-th" (where i is any integer) to the expression (for example, "highest" may be interpreted interchangeably with "i-th highest").

[0398] In this disclosure, "of," "for," "regarding," "related to," and "associated with" may be interpreted as being interchangeable.

[0399] In this disclosure, phrases such as "when A, B", "if A, then B", "B upon A", "B in response to A", "B based on A", "B during / while A", "B before A", "B at (the same time as) / on A", "B after A", "B since A", and "B until A" may be interchangeable. Furthermore, A, B, etc., may be replaced with appropriate expressions such as nouns, gerunds, or regular sentences depending on the context. The time difference between A and B may be approximately 0 (immediately after or immediately before). Additionally, a time offset may be applied to the time when A occurs. For example, "A" may be interpreted as "before / after the time offset when A occurs". The time offset (e.g., one or more symbols / slots) may be predetermined or determined by the UE based on the information provided.

[0400] In this disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), opportunity, resource, etc., may be interpreted interchangeably.

[0401] Although the invention described herein has been explained in detail above, it will be clear to those skilled in the art that the invention described herein is not limited to the embodiments described herein. The descriptions herein are illustrative and not intended to be restrictive in any way to the invention described herein.

Claims

1. A transmitter unit that transmits capability information to support reporting of two power headrooms (PHRs) for simultaneous multi-panel transmission, The system includes a control unit that triggers the PHR when the path loss of a reference signal corresponding to a serving cell changes below a predetermined threshold, When multi-panel simultaneous transmission is set for the serving cell, the control unit includes the two PHRs in the MAC (Medium Access Control) control element (CE) of the terminal.

2. The terminal according to claim 1, wherein the multi-panel simultaneous transmission is performed using a spatial division multiplexing (SDM) method or a single-frequency network (SFN) method.

3. The steps include transmitting capability information to support reporting of two power headrooms (PHRs) for simultaneous multi-panel transmission, The step of triggering the PHR when the path loss of the reference signal corresponding to a serving cell changes below a predetermined threshold, A wireless communication method for a terminal, comprising the step of including the two PHRs in a MAC (Medium Access Control) control element (CE) when the multi-panel simultaneous transmission is set for the serving cell.

4. A receiver that receives capability information to support the reporting of two power headrooms (PHRs) for simultaneous multi-panel transmission, A transmitting unit transmits the settings for the multi-panel simultaneous transmission for a certain serving cell, and transmits setting information regarding the threshold for path loss change of the reference signal corresponding to the serving cell in order for the terminal to trigger the PHR, The receiving unit is a base station that receives MAC (Medium Access Control) control elements (CE) including the two PHRs from the terminal.

5. A system having a terminal and a base station, The aforementioned terminal is A transmitter unit that transmits capability information to support reporting of two power headrooms (PHRs) for simultaneous multi-panel transmission, The system includes a control unit that triggers the PHR when the path loss of a reference signal corresponding to a serving cell changes below a predetermined threshold, When multi-panel simultaneous transmission is set for the serving cell, the control unit includes the two PHRs in the MAC (Medium Access Control) control element (CE), The aforementioned base station is A system having a receiving unit that receives the aforementioned capability information.

Images