Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is characterized by including a reception unit that receives a higher layer parameter corresponding to a report related to a beam-specific maximum permissible exposure, and a control unit that controls transmission of the report using a medium access control control element (MAC CE) on the basis of the higher layer parameter. According to one embodiment of the present disclosure, a report related to MPE can be appropriately made.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

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

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, the 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] In existing LTE systems (e.g., 3GPP Rel.8-14), user equipment (UE) uses at least one of a UL data channel (e.g., Physical Uplink Shared Channel (PUSCH)) and a UL control channel (e.g., Physical Uplink Control Channel (PUCCH)) to transmit uplink control information (UCI).

[0005] Existing technical documents

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 36.300V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)", April 2010 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] Within NR, a response to the issue of Maximum Permitted Exposure (MPE) is being investigated. For health and safety reasons, UEs are required to comply with the regulations of the Federal Communications Commission (FCC) regarding maximum radiation exposure to the human body.

[0010] To address the MPE issue, reporting related to MPE in the UL transmit beam is being considered. However, there is no research on how to conduct MPE-related reporting when the UE uses multiple transmit beams. If MPE-related reporting is not properly conducted, there are concerns about reduced system performance, such as throughput.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station capable of appropriately performing MPE-related reporting.

[0012] Methods for solving problems

[0013] The terminal involved in one aspect of this disclosure is characterized by having: a receiving unit that receives higher-level parameters corresponding to a report related to the maximum permissible exposure specific to the beam; and a control unit that, based on the higher-level parameters, controls the transmission of the report using a Media Access Control (MAC) control element.

[0014] Invention Effects

[0015] According to one method disclosed herein, it is possible to make appropriate reports related to MPE. Attached Figure Description

[0016] Figure 1 This is a diagram showing an example of a single entry PHR MAC CE in Rel.16.

[0017] Figure 2This is a diagram showing the first example of the multi-entry PHR MAC CE in Rel.16.

[0018] Figure 3 This is a diagram showing the second example of the multi-entry PHR MAC CE in Rel.16.

[0019] Figure 4 This is a diagram illustrating an example of a PHR MAC CE used in a beam-specific MPE report.

[0020] Figure 5 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0021] Figure 6 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0022] Figure 7 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0023] Figure 8 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0024] (MPE)

[0025] In NR, solutions are being developed to address the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure). For health and safety reasons, UEs are required to comply with the regulations of the Federal Communications Commission (FCC) regarding maximum radiation exposure to the human body. For example, Rel. 15NR specifies the following two limiting methods as regulations for limiting exposure.

[0026] <Restriction Method 1>

[0027] As a limiting method 1, a limitation is specified using the Power-management Maximum Power Reduction (P-MPR), which is the maximum permissible UE output power reduction. For example, the UE's maximum output power P CMAX,f,c Set as, corresponding P UMAX,f,c (The measured maximum output power and the measured set maximum UE output power) satisfy the following equation (1).

[0028] P Powerclass -MAX(MAX(MPR f,c A-MPR f,c )+ΔMB P,n P-MPR f,c )-MAX{T(MAX(MPR f,c A-MPR f,c ,)),T(P-MPR f,c )}≤P UMAX,f,c ≤EIRP max (1)

[0029] EIRP max Set it to the maximum value of the corresponding measured peak equivalent isotropic radiated power (EIRP: Equivalent Isotopically Radiated Power). Set P-MPR... f,c Let be the value representing the reduction in the maximum permitted output power for carrier f of serving cell c. P-MPR f,c The maximum output power P of the UE set for the carrier f introduced into the serving cell c. CMAX,f,c In the formula, the UE is thus able to report the maximum available output transmit power to the base station (e.g., gNB). The base station can then use this report in scheduling decisions. P-MPR f,c It can be used to ensure compliance with the electromagnetic energy absorption requirements and to deal with unnecessary radiation / self-protection requirements in situations where simultaneous transmission occurs on multiple RATs in scenarios not covered by 3GPP RAN, and it can also be used to ensure compliance with the electromagnetic energy absorption requirements in situations where proximity detection is used to deal with requirements such as the need for lower maximum output power.

[0030] <Restriction Method 2>

[0031] In 3GPP Rel.15NR, to meet millimeter-wave human protection guidelines, UE capability information was introduced to inform the UE of the uplink transmission rate that applications that do not require P-MPR can transmit. This capability information can also be referred to as the maximum uplink duty cycle (maxUplinkDutyCycle-FR2) in Frequency Range 2 (FR2).

[0032] `maxUplinkDutyCycle-FR2` is equivalent to a higher-layer parameter. `maxUplinkDutyCycle-FR2` can also be an upper limit on the UL transmission ratio within a certain evaluation period (e.g., 1 second). In Rel.15NR, this value is any one of n15, n20, n25, n30, n40, n50, n60, n70, n80, n90, and n100, corresponding to 15%, 20%, 25%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively. `maxUplinkDutyCycle-FR2` can also be applied to all UE power levels of FR2. Alternatively, a default value can be left unspecified for `maxUplinkDutyCycle-FR2`.

[0033] If the field maxUplinkDutyCycle-FR2 exists as UE capability information, and the proportion of UL (Uplink) symbols transmitted during the 1-second evaluation period is greater than maxUplinkDutyCycle-FR2, the UE can also follow UL scheduling and apply the restrictions using P-MPR (Restriction Method 1). Otherwise, the UE may not apply P-MPR.

[0034] Even if the maxUplinkDutyCycle-FR2 field is not present as UE capability information, the basis for electromagnetic power density exposure requirements (MPE requirements) can be guaranteed by reducing power density or other units.

[0035] <MPE Report>

[0036] For UEs equipped with multiple panels (multi-panel), in order to enable high-speed selection of UL panels, research is being conducted on UL beam indication based on considering the UL coverage loss caused by MPE and prompting UL transmit beam selection.

[0037] However, issues arise regarding how to expedite MPE-based beam / panel selection and how to notify the network controller (NW) of this selection to avoid network-based blind detection. If MPE-based beam / panel selection cannot be performed at a high speed, there are concerns about reduced system performance, such as decreased throughput. Furthermore, when the UE spontaneously changes its UL transmit beam without the network's knowledge of the changed UL transmit beam, the network performs blind detection to determine the UL receive beam, raising concerns about further reduced system performance, including decreased throughput.

[0038] Therefore, we consider the case where the UE reports that the uplink transmit beam does not meet the Maximum Allowable Exposure (MPE) requirement.

[0039] The UE can also report the occurrence of an MPE problem if the UE is configured to report such a problem (e.g., via RRC layer signaling) and the UE detects an MPE problem for the indicated UL beam.

[0040] In this disclosure, MPE event, MPE problem, MPE failure, failure to meet MPE requirements, and inability to pass MPE requirements can be used interchangeably. In this disclosure, MPE security, MPE suitability, no MPE problem, no MPE failure, meeting MPE requirements, and passing MPE requirements can also be used interchangeably. In this disclosure, report of MPE problem occurrence, report of MPE problem, first report, and request for recovery (resolution) of MPE problem can also be used interchangeably.

[0041] The UE can also detect (determine) an MPE problem if the UL transmit beam or reference signal (RS) used for UL transmission (e.g., PUSCH) does not meet the MPE requirements (if the power parameters used for the indicated UL transmit beam do not meet the MPE requirements). The indication of the UL transmit beam can be either an SRS resource indicator (SRI) indicating the sounding reference signal (SRS) resource used for PUSCH, or spatial relationship information or transmission configuration indicator (TCI) state or quasi co-location (QCL) assumption for at least one of PUCCH, PUSCH, SRS, and PRACH.

[0042] The MPE requirement can also be that at least one of the following is satisfied.

[0043] • P-MPR required considering MPE f,c It is greater than the P-MPR threshold.

[0044] P calculated considering MPE CMAX,f,c (The maximum output power of carrier f for serving cell c is set to the UE) is less than P. CMAX Threshold.

[0045] • The power headroom (PH) value calculated considering MPE (e.g., actual PH, virtual PH) is less than the PH threshold.

[0046] P-MPR threshold, P CMAXAt least one of the threshold and pH threshold can be predefined or set.

[0047] The UE can also report the occurrence of MPE problems based on the detection of MPE problems.

[0048] The UE can also determine and report UL transmit beams / panels that meet MPE requirements based on the detection of MPE issues. In this disclosure, UL transmit beams / panels that meet MPE requirements, MPE-suitable beams / panels, MPE-safe beams / panels, candidate beams / panels, and new UL transmit beams / panels can also be interchanged. In this disclosure, MPE-suitable beam / panel reports, MPE-suitable beam / panel lists, and UL transmit beam / panel change plans can also be interchanged.

[0049] The UE can also report at least one determined MPE that is suitable for the beam / panel and manage the UL beam.

[0050] <New MAC CE>

[0051] It can also be defined as a new Medium Access Control Element (MAC CE) with a new logical channel ID (LCID) for reporting at least one information related to the occurrence of an MPE problem and a beam / panel (MPE-suitable beam / panel) that meets the MPE requirements for more than one cell and BWP. The new MAC CE can also represent at least one new UL transmitting beam / panel and a cell where an MPE problem has occurred. The new MAC CE can also contain at least one of the following: 1 to 8.

[0052] [Content 1]

[0053] For each cell / BWP, a 0- or 1-bit field is used to represent the MPE problem. The MAC CE can also contain fields for more than one cell / BWP. The MAC CE can also contain a cell / BWP index.

[0054] [Content 2]

[0055] For a cell / BWP where an MPE issue is detected, an index of one or more, or up to N, MPEs suitable for beam / panel.

[0056] [Content 3]

[0057] For multiple cells / BWPs where MPE issues are detected, an index of MPE-suitable beams / panels is provided. MAC CE can also contain one or more, or up to N, indexes of MPE-suitable beams / panels for each of these multiple cells / BWPs.

[0058] [Content 4]

[0059] Based on at least one of contents 1, 2, and 3, the required P-MPR is specified for the index of each beam / panel.

[0060] [Content 5]

[0061] Based on at least one of contents 1, 2, and 3, the estimated remaining power (estimated considering MPE) is calculated for each beam / panel index, taking into account P-MPR. The estimated remaining power can be either a PH value based on the actual transmission or reference format (virtual transmission) considering MPE, or a Power Headroom Reporting (PHR) considering MPE for each beam. The PHR may also include content from the PHR MAC CE (PH type, PH value, P...). CMAX,f,c (at least one of them).

[0062] [Content 6]

[0063] Based on at least one of contents 1, 2, and 3, P is calculated for each beam / panel index. CMAX,f,c .

[0064] [Content 7]

[0065] Two or more combinations of content 1 to 6.

[0066] [Content 8]

[0067] This indicates that no suitable MPE field (bits) for the beam / panel was found for the cell / BWP based on content 7.

[0068] The beam / panel index can also be an SSB / CSI-RS / SRS index, or it can be set together with the SSB / CSI-RS / SRS index. The panel index can also be an RS group / RS set index, an antenna port / antenna port group / antenna port set index, an antenna design / antenna mode index, or other new indexes.

[0069] <PHR MAC CE>

[0070] In 3GPP Rel.16, mpe-Reporting, mpe-ProhibitTimer, and mpe-Threshold are defined as RRC parameters used to control PHR. mpe-Reporting indicates whether the UE reports MPE P-MPR in PHR MAC CE. mpe-ProhibitTimer is a timer that starts when MPE P-MPR reporting is triggered, and represents the subframe number. mpe-Threshold represents the P-MPR threshold [dB] for MPE P-MPR reporting when FR2 is set.

[0071] A PHR is triggered when mpe-Reporting is set, mpe-ProhibitTimer is not executed, and the P-MPR is applied and measured in at least one active service to satisfy the MPE requirements after the last transmission of the PHR in the MAC entity, and the P-MPR is above mpe-Threshold.

[0072] An MPE P-MPR report is triggered when mpe-Reporting is set, mpe-ProhibitTimer is not executed, and the P-MPR applied and measured in at least one active service to meet MPE requirements is above mpe-Threshold.

[0073] When MPE-Reporting is configured, the UE obtains the P-MPR value corresponding to the MPE field from the physical layer and sets the corresponding P field in the PHR MAC CE according to the obtained P-MPR value. The PHR MAC CE can be either a multi-entry PHR MAC CE (multiple PHRs) or a single-entry PHR MAC CE (single PHR).

[0074] If an MPE P-MPR report is triggered, the UE starts or restarts the mpe-ProhibitTimer and cancels the triggered MPE P-MPR report for the serving cell contained in the PHR MAC CE.

[0075] Figure 1 This is a diagram illustrating an example of a single-entry PHR MAC CE in Rel.16. The "P" field, when mpe-Reporting is set, indicates the power backoff applied to meet MPE requirements; when mpe-Reporting is not set, it indicates whether the MAC entity (UE) applies power management-based power backoff. CMAX,f,cThe field indicates the P that was used in the calculation of the previous PH field. CMAX,f,c “R” indicates a reserved bit. The “PH” field indicates the power margin level. The “P” field indicates the power backoff applied to meet MPE requirements when MPE-Reporting is set. The “MPE” field indicates the power backoff applied to meet MPE requirements when MPE-Reporting is set and the “P” field is set to 1. The “MPE” field becomes a reserved bit (R) when MPE-Reporting is not set, or when the “P” field is set to 0.

[0076] Figure 2 This is a diagram showing the first example of the multi-entry PHR MAC CE in Rel.16. Figure 2 The example is applied to situations where the largest serving cell index in the uplink serving cell is less than 8.

[0077] Figure 3 This is a diagram showing the second example of the multi-entry PHR MAC CE in Rel.16. Figure 3 The example is applied to situations where the largest serving cell index in the uplink serving cell is 8 or higher.

[0078] Figure 2 , Figure 3 The "C" i The "V" field indicates the presence of the "PH" field in the serving cell with serving cell index i. The "V" field indicates whether the PH value is based on the actual transmission or a reference format. Figure 2 , Figure 3 In the example, Figure 1 The fields shown ("P", "R", "PH", "P") CMAX,f,c "" and "MPE" are set for each serving cell.

[0079] As mentioned above, to address the MPE issue, it's considered that the UE should send MPE-related reports related to the UL transmit beam. However, there's no research on how to perform MPE-related reporting when the UE uses multiple transmit beams / panels. If MPE-related reporting cannot be properly performed, there are concerns about reduced system performance, such as throughput.

[0080] Therefore, the inventors of this invention conceived of a terminal capable of appropriately reporting MPE-related information when the UE uses multiple transmit beams / panels.

[0081] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0082] In this disclosure, "A / B / C" and "at least one of A, B, and C" can be substituted for each other. In this disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, activated DL BWP, activated UL BWP, and band domain can also be substituted for each other. In this disclosure, index, ID, indicator, and resource ID can also be substituted for each other. In this disclosure, support, control, capable of control, operation, and capable of operation can also be substituted for each other.

[0083] In this disclosure, configure, activate, update, indicate, enable, specify, and select can also be used interchangeably.

[0084] In this disclosure, MAC CE and activation / deactivation commands can be used interchangeably.

[0085] In this disclosure, higher-layer signaling may be any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc. In this disclosure, RRC, RRC signaling, RRC parameters, higher layers, higher-layer parameters, RRC information elements (IEs), and RRC messages may also be used interchangeably.

[0086] MAC signaling can also use MAC Control Element (MAC CE) or MAC Protocol Data Unit (PDU). Broadcast information can also be, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), or Other System Information (OSI).

[0087] In this disclosure, beam, panel, spatial domain filter, spatial settings, TCI state, TCI state pool, multiple TCI states, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, QCL concept, QCL parameters, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoder, DL precoder, DL-RS, RS of QCL type D of TCI state / QCL concept, RS of QCL type A of TCI state / QCL concept, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoder, UL precoder, and PL-RS can also be interchanged. In this disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS having QCL type X, source of DL-RS, SSB, CSI-RS, and SRS can also be interchanged.

[0088] (Wireless communication method)

[0089] The UE receives higher-layer parameters (RRC parameters) corresponding to a beam-specific Maximum Permissible Exposure (MPE) report (MPE report), and controls the transmission of this report using MAC CE (PHR MAC CE) based on these higher-layer parameters. Hereinafter, the RRC parameters corresponding to the beam-specific MPE report will be named "new-mpe-Reporting", "new-mpe-ProhibitTimer", and "new-mpe-Threshold", but other names may also be used.

[0090] In this disclosure, beam, panel, beam, and panel can be interchanged with each other. In this disclosure, MPE, MPE P-MPR, and P-MPR can also be interchanged with each other.

[0091] <First Implementation>

[0092] The RRC parameter new-mpe-Reporting can also be defined to indicate whether a beam-specific MPE report is sent. When new-mpe-Reporting is set, the UE performs beam-specific P-MPR measurements to meet the MPE requirements, triggering a beam-specific MPE report.

[0093] As an RRC parameter corresponding to a beam-specific MPE report, it can also be set as a new-mpe-ProhibitTimer, a timer executed when an MPE report is triggered. Multiple new-mpe-ProhibitTimers can be set, and each can be associated with a beam. In the case of an MPE report being triggered for a specific beam, the new-mpe-ProhibitTimer associated with the corresponding UE's beam can be started or restarted, and the triggered MPE P-MPR report for the serving cell's beam included in the PHR MAC CE or the new MPE MAC CE can be eliminated. The new MPE MAC CE can, for example, be the MAC CE shown in the third embodiment described later.

[0094] As an RRC parameter corresponding to the beam-specific MPE report, it can also be set as a new-mpe-Threshold as a threshold corresponding to the beam's power management maximum power drop (P-MPR) and applied to all beams that are set.

[0095] Multiple new-mpe-Thresholds can also be set, each associated with a beam. The UE can also compare the beam-specific P-MPR measured to meet MPE requirements with the corresponding (associated) new-mpe-Threshold.

[0096] For example, if new-mpe-Reporting is set, new-mpe-ProhibitTimer is not executed, and the P-MPR of the beam applied and measured in at least one active service to satisfy the MPE requirements is above the new-mpe-Threshold of the corresponding beam after the last transmission of PHR in the MAC entity, PHR can also be triggered.

[0097] <Second Implementation>

[0098] The method for setting beam-specific RRC parameters and the relationship between UE-specific MPE reports and beam-specific MPE reports are explained. For example, beam-specific RRC parameters can also be set per UE (terminal), per cell group, per serving cell, or per Bandwidth Part (BWP). The beam-specific RRC parameters in each embodiment can also be at least one of new-mpe-Reporting, new-mpe-ProhibitTimer, and new-mpe-Threshold shown in the first embodiment.

[0099] In this disclosure, RRC parameters (the RRC parameters corresponding to the MPE report), MPE reports, P-MPR reports, and MPE P-MPR reports can also be substituted for each other.

[0100] [Method 2-1]

[0101] Beam-specific RRC parameters can also be set for each UE and applied to all FR2 serving cells.

[0102] [Method 2-2]

[0103] Beam-specific RRC parameters can also be set for each cell group of the UE (Master cell group (MCG) / Secondary cell group (SCG) / PUCCH cell group) and applied to all serving cells within the set cell group.

[0104] [Methods 2-3]

[0105] Beam-specific RRC parameters can also be set for each serving cell of the UE, and different parameters can be set for different serving cells.

[0106] [Methods 2-4]

[0107] Beam-specific RRC parameters can also be set for each BWP within the UE's serving cell, and different BWPs can be set with different parameters.

[0108] Regarding the relationship between UE-specific and beam-specific MPE reports, examples from methods A through D are provided below. Any of methods A through D can be combined with any of methods 2-1 through 2-4. The RRC parameters corresponding to the UE-specific MPE report can also be at least one of the mpe-Reporting, mpe-ProhibitTimer, and mpe-Threshold parameters from 3GPP Rel.16 mentioned above. UE-specific MPE reports can also be based on, for example, [the following is a list of parameters]. Figures 1-3 The report shown is from MAC CE.

[0109] [Method A]

[0110] The UE can be configured with either a UE-specific MPE report or a beam-specific MPE report. If a beam-specific MPE report is configured for the UE, then a UE-specific MPE report is not expected to be configured. If a UE-specific MPE report is configured for the UE, then a beam-specific MPE report is not expected to be configured.

[0111] When mode 2-1 is applied, the UE can be configured to send either a UE-specific MPE report or a beam-specific MPE report. When mode 2-2 is applied, the same MPE report (UE-specific or beam-specific) can be configured for different cell groups. When mode 2-3 is applied, the same MPE report (UE-specific or beam-specific) can be configured for different cells (serving cells). When mode 2-4 is applied, the same MPE report (UE-specific or beam-specific) can be configured for different BWPs within the serving cell.

[0112] [Method B]

[0113] The UE can be configured to send both UE-specific and beam-specific MPE reports. The UE can also be configured to send different MPE reports for different cells / cell groups / BWPs. In the case of applying mode 2-2, different MPE reports (UE-specific or beam-specific) can also be configured for different cell groups. In the case of applying mode 2-3, different MPE reports (UE-specific or beam-specific) can also be configured for different cells (serving cells). In the case of applying mode 2-4, different MPE reports (UE-specific or beam-specific) can also be configured for different BWPs.

[0114] [Method C]

[0115] A UE can be configured to send both UE-specific MPE reports and beam-specific MPE reports. A UE can also be configured to send the same MPE report for different cells / cell groups / BWPs. When a PHR or P-MPR report is triggered, the UE can also determine (select) at least one of the UE-specific MPE report and beam-specific MPE report based on its implementation or specific rules (specifications). Even when both UE-specific and beam-specific MPE reports are configured, the UE can still apply the beam-specific MPE report.

[0116] [Method D]

[0117] The UE can also use further conditions based on additional settings in mode A / B / C regarding which UE-specific MPE report or beam-specific MPE report is applied.

[0118] The UE may also use MAC CE to send a UE-specific MPE report if at least one of the following conditions (1) and (2) is met.

[0119] (1) PHR was triggered.

[0120] (2) Beam-specific MPE reports were not triggered.

[0121] Alternatively, the UE can use MAC CE to send a beam-specific MPE report only when a beam-specific MPE report is triggered.

[0122] In beam-specific MPE reports, UE-specific MPE reports can also be included in MAC CE when multiple (all) beams are triggered.

[0123] [Trigger Condition]

[0124] In cases where the triggering conditions (detection conditions for MPE problems) for UE-specific MPE reports and beam-specific MPE reports differ due to differences in the metric or threshold (mpe-Threshold / new-mpe-Threshold) used to detect MPE problems, the UE can also follow the following procedure.

[0125] When either the RRC parameter mpe-Reporting or new-mpe-Reporting is set (detected), the UE begins the corresponding MPE procedure #1. Then, when other parameters in mpe-Reporting and new-mpe-Reporting (corresponding to other MPE procedures #2) are set (detected), the UE performs any of the following processes (1) to (4). MPE procedures #1 and #2 are, for example, UE-specific MPE reporting (mpe-Reporting) procedures or beam-specific MPE reporting (new-mpe-Reporting) procedures.

[0126] (1) The UE continues the MPE process #1 that has already started, ignoring other MPE processes #2.

[0127] (2) The UE ends the MPE process #1 that has already started and starts other MPE processes #2.

[0128] (3) The UE can also decide whether to continue or terminate the started MPE process #1 based on whether the started MPE process #1 is new-mpe-Reporting or mpe-Reporting. For example, the UE can continue the MPE process #1 if the started MPE process #1 is new-mpe-Reporting. The UE can also terminate the MPE process #1 if the started MPE process #1 is mpe-Reporting.

[0129] (4) The UE can also decide whether to continue or terminate the already started MPE process #1 based on whether the MPE process #2 corresponding to other detected MPE issues is new-mpe-Reporting or mpe-Reporting. For example, the UE can terminate the MPE process #1 if the MPE process #2 is new-mpe-Reporting. The UE can also continue the MPE process #1 if the MPE process #2 is mpe-Reporting.

[0130] Furthermore, the triggering conditions for mpe-Reporting and new-mpe-Reporting can be the same. In this case, the UE can also choose either mpe-Reporting or new-mpe-Reporting based on specific rules (specifications). For example, the triggering condition for a UE-specific MPE report is that the P-MPR measured to meet the MPE requirements is greater than mpe-Threshold. The triggering condition for a panel-specific MPE report is that the P-MPR measured to meet the MPE requirements of the panel is greater than new-mpe-Threshold. Therefore, when there is no simultaneous transmission from multiple panels and mpe-Threshold and new-mpe-Threshold are the same, the triggering conditions for mpe-Reporting and new-mpe-Reporting become the same.

[0131] <Third Implementation Method>

[0132] For beam-specific MPE reports, it is also possible to use with Figures 1-3 The PHR MAC CE shown in Rel.16 is a set of octets (8-bit fields) that are the same as those in a single or multiple entries. For example, each set (entry) of the PHR MAC CE may also correspond to a beam / panel in the serving cell.

[0133] [Method 3-1]

[0134] When a beam-specific MPE report is triggered for the serving cell, information about all beams of the serving cell can also be reported in a specific order. The size of the MAC CE can also be associated with the maximum number of panels (maximum number of UL panels) in the serving cell / cell group / FR / UE. In this case, since the beam ID / panel ID can be determined based on the order of entries within the MAC CE, the UE may not report the beam ID / panel ID.

[0135] Figure 4This is a diagram illustrating an example of a PHR MAC CE used in a beam-specific MPE report. Figure 4 In the example, the PHR MAC CE includes MPE reports for panels #0 to #2. That is, it can perform MPE reports for a maximum of 3 panels. Two octets are used for each panel. Panels #0 to #2 can also be replaced with those for beams #0 to #2.

[0136] [Method 3-2]

[0137] In the case of a beam-specific MPE P-MPR report triggered for the serving cell, either only one beam / panel information can be reported, or MPE reports can be made for multiple (partial) beams / panels based on conditions defined in the specification. In this case, the size of the MAC CE is variable.

[0138] Furthermore, the size of the beam ID / panel ID / MAC CE can also be appended to the MAC CE. The field representing the size of the beam ID / panel ID / MAC CE can either reuse at least one of the P and R fields, or at least one value represented by at least one of the P and R fields, or a new field can be added. By including the beam ID / panel ID, the beam / panel can be identified even when multiple (partial) beams / panels are reported. By including the size of the MAC CE, the size can be determined even if the size of the MAC CE is variable. Additionally, in method 3-2, only beams / panels with power backoff applied are reported via the MAC CE; therefore, power backoff may not be represented again in the P field. Whether to reuse existing fields or add new fields can be determined based on the maximum number of panels for the UE. The UE can also determine the reported beam / panel based on either condition 1 or condition 2 below.

[0139] [[Condition 1]]

[0140] If the P-MPR of a beam is above the new-mpe-Threshold of the corresponding beam when it is applied and measured to meet the MPE requirements, an MPE report may be sent only for that beam.

[0141] [[Condition 2]]

[0142] Along with one or more beams corresponding to a P-MPR above new-mpe-Threshold, the UE may also report at least one MPE secure beam (if present). An MPE secure beam is, for example, one or more beams corresponding to a P-MPR less than new-mpe-Threshold.

[0143] The number of octets in the PHR MAC CE set does not matter whether they are the same or different in different serving cells. For example, if one serving cell is configured with a UE-specific MPE and other serving cells are configured with a panel-specific MPE, the number of octets in the PHR MAC CE set used in the MPE reports of each serving cell may also be different. The number of octets in the PHR MAC CE set used in the MPE reports may also differ if the maximum number of panels in each serving cell is different, or if different numbers of panels are reported by each serving cell.

[0144] <UE capability>

[0145] The UE can also send a report indicating whether it supports beam-specific MPE reporting for each UE / cell group / serving cell. The UE can also send a report indicating whether it supports beam-specific new-mpe-ProhibitTimer for each UE / cell group / serving cell. The UE can also send a report indicating whether it supports beam-specific new-mpe-Threshold for each UE / cell group / serving cell.

[0146] The UE can also send a report indicating whether both UE-specific MPE reports and beam-specific reports are configured for the same cell / cell group (or different cells / cell groups). The UE can also send a report indicating whether it can send beam-specific MPE reports for all beams. The UE can also send a report indicating whether it can report the beam ID / panel ID within the MAC CE used for beam-specific MPE reports.

[0147] (Wireless Communication System)

[0148] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0149] Figure 5This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 can also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0150] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0151] 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.

[0152] Wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., MN and SN are dual connectivity of NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0153] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0154] User terminal 20 may also connect to at least one of multiple base stations 10. User terminal 20 may also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0155] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also be equivalent to a frequency band higher than FR2.

[0156] In addition, user terminal 20 can also use at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) to communicate in each CC.

[0157] Multiple base stations 10 can also be connected via wired (e.g., fiber optic cable based on the Common Public Radio Interface (CPRI), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, base station 11, which is equivalent to a host station, can also be referred to as an Integrated Access Backhaul (IAB) donor, and base station 12, which is equivalent to a relay station, can also be referred to as an IAB node.

[0158] Base station 10 may also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0159] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0160] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be used. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be used.

[0161] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used in the wireless access methods of UL and DL.

[0162] As a downlink channel, the wireless communication system 1 can also use downlink shared channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), downlink control channels (Physical Downlink Control Channel (PDCCH)) and so on, which are shared by each user terminal 20.

[0163] In addition, as uplink channels, the wireless communication system 1 may also use uplink shared channels (Physical Uplink Shared Channel (PUSCH)), uplink control channels (Physical Uplink Control Channel (PUCCH)), random access channels (Physical Random Access Channel (PRACH)) and so on, which are shared by each user terminal 20.

[0164] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0165] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may include, for example, downlink control information (DCI), which includes scheduling information for at least one of PDSCH and PUSCH.

[0166] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can also be replaced with DL data, and PUSCH can also be replaced with UL data.

[0167] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0168] A search space can also correspond to one or more PDCCH candidates equivalent to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0169] Uplink control information (UCI) including at least one of Channel State Information (CSI), delivery confirmation information (such as Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR) can also be transmitted via PUCCH. Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0170] Furthermore, in this disclosure, downlink, uplink, etc., may be described without the word "link". Additionally, various channels may be described without the word "physical".

[0171] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. As DL-RS, wireless communication system 1 can also transmit cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), phase tracking reference signals (PTRS), etc.

[0172] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0173] Furthermore, in the wireless communication system 1, the uplink reference signal (UL-RS) can also transmit measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS). Additionally, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific reference signal).

[0174] (Base station)

[0175] Figure 6 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission path interface (transmission line interface) 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission path interface 140 may each be provided in more than one manner.

[0176] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it can also be envisioned that the base station 10 also possesses other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0177] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0178] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0179] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0180] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0181] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0182] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0183] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0184] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, perform processing at the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer (e.g., RLC retransmission control), and Medium Access Control (MAC) layer (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 110, and generate a bit string to be transmitted.

[0185] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform transmission processing such as channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output the baseband signal.

[0186] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0187] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received through the transmitting and receiving antenna 130 into the baseband signal.

[0188] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data, etc.

[0189] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 110.

[0190] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between the device included in the core network 30 and other base stations 10, and can also acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0191] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface 140.

[0192] Additionally, the transmitting and receiving unit 120 can also transmit higher-level parameters corresponding to a report related to the maximum permissible exposure specific to the beam, and receive the report transmitted based on the higher-level parameters using a medium access control (MAC) control element (CE).

[0193] The control unit 110 can also control the reception of the report sent based on the higher-level parameters and using a medium access control (MAC) control element (CE).

[0194] (User terminal)

[0195] Figure 7 This diagram illustrates an example of the structure 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. Alternatively, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be included.

[0196] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the user terminal 20 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0197] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0198] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., to be transmitted as signals and forward them to the transmission / reception unit 220.

[0199] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of a transmitter / receiver, RF circuit, baseband circuit, filter, phase shifter, measurement circuit, transmitting / receiving circuit, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0200] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0201] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0202] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0203] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0204] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0205] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0206] Furthermore, the application of DFT processing can be based on the transform precoding settings. For a specific channel (e.g., PUSCH), if transform precoding is enabled, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above for transmitting the channel using the DFT-s-OFDM waveform. Otherwise, the transmit / receive unit 220 (transmit processing unit 2211) can perform DFT processing as described above without performing DFT processing.

[0207] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0208] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the baseband signal for the wireless frequency band signal received by the transmitting and receiving antenna 230.

[0209] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to acquire user data.

[0210] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can 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 can also be output to the control unit 210.

[0211] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one transmitting / receiving unit 220 and transmitting / receiving antenna 230.

[0212] Additionally, the transmitting / receiving unit 220 can also receive higher-level parameters corresponding to a report related to the maximum permissible exposure specific to the beam, and based on the higher-level parameters, use a medium access control (MAC) control element (CE) to transmit the report.

[0213] The higher-layer parameters may also include at least one parameter indicating whether the report is sent, a timer executed when the report is triggered, and a threshold corresponding to the maximum power drop of the beam's power management. The higher-layer parameters may also be set per terminal, per cell group, per serving cell, or per bandwidth segment.

[0214] The control unit 210 can also control the transmission of reports using a medium access control (MAC) control element (CE) based on the aforementioned higher-level parameters. The control unit 210 can also control the transmission of both beam-specific maximum permissible exposure reports and terminal-specific maximum permissible exposure reports.

[0215] (Hardware Structure)

[0216] Furthermore, the block diagrams used in the description of the above embodiments illustrate functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single device that is physically or logically combined, or it can be implemented by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. A functional block can also be implemented by combining the aforementioned single device or multiple devices with software.

[0217] Here, the functions include judgment, decision, determination, calculation, calculation, processing, export, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that implements the sending function can also be called a transmitting unit, transmitter, etc. As described above, the implementation method is not particularly limited.

[0218] For example, in one embodiment of this disclosure, the base station, user terminal, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 8 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0219] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include any of the apparatuses.

[0220] For example, only one processor 1001 is shown, but there can be multiple processors. Furthermore, processing can be performed by one processor, or simultaneously, sequentially, or by two or more processors using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0221] The functions of the base station 10 and the user terminal 20 are implemented, for example, by reading specific software (programs) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 can perform calculations and control communication via the communication device 1004, or control at least one of reading out and writing data in the memory 1002 and the storage device 1003.

[0222] The processor 1001, for example, enables the operating system to operate and control the computer as a whole. The processor 1001 may also be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a portion of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0223] 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 performs various processes accordingly. As a program, a program that causes the computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001; similar implementations can be made for other functional blocks.

[0224] The memory 1002 may also be a computer-readable recording medium, such as being composed of at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0225] Storage device 1003 may also be a computer-readable recording medium, such as comprising at least one of the following: flexible disc, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage device 1003 may also be referred to as an auxiliary storage device.

[0226] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. To implement at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the aforementioned transmit / receive unit 120 (220) and transmit / receive antenna 130 (230) may also be implemented by the communication device 1004. The transmit / receive unit 120 (220) may also be implemented by physically or logically separating the transmit unit 120a (220a) and the receive unit 120b (220b).

[0227] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0228] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses between the devices.

[0229] Furthermore, the base station 10 and the user terminal 20 can also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and can be used to implement some or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0230] (Modified Example)

[0231] Furthermore, the terms described in this disclosure, as well as those necessary for understanding this disclosure, may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0232] A radio frame can also be composed of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0233] Here, the parameter set can also be communication parameters applied in at least one of the transmission and reception of a signal or channel. For example, the parameter set can also represent 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 structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0234] In the time domain, a time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.). Furthermore, a time slot can also be a time unit based on a set of parameters.

[0235] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0236] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use their respective other names. Furthermore, the time units such as frames, subframes, time slots, mini-time slots, and symbols used in this disclosure can be used interchangeably.

[0237] For example, a subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, a time slot or a mini-time slot can also be called a TTI. That is, at least one of a subframe and a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. In addition, the unit representing TTI may not be called a subframe, but a time slot, mini-time slot, etc.

[0238] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (frequency bandwidth, transmit power, etc., available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0239] TTI can also be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., and can also be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) mapped to transmission blocks, code blocks, codewords, etc. can be shorter than the TTI.

[0240] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. Furthermore, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0241] A TTI with a duration of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), standard TTI, long TTI, normal subframe, standard subframe, long subframe, time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened subframe, short subframe, mini time slot, sub-time slot, time slot, etc.

[0242] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0243] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set.

[0244] Furthermore, an RB can contain one or more symbols in the time domain, and can also be a time slot, a mini-time slot, a subframe, or the length of a TTI. A TTI, a subframe, etc., can also be composed of one or more resource blocks.

[0245] In addition, one or more RBs can also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier Groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB pairs, etc.

[0246] Furthermore, a resource block can also consist of one or more resource elements (REs). For example, an RE can also be a radio resource area consisting of a subcarrier and a symbol.

[0247] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can also be determined by the index of RBs based on the common reference point of the carrier. PRBs can also be defined in a BWP and appended with numbers within that BWP.

[0248] A BWP can also include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs can also be set within a single carrier.

[0249] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Furthermore, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0250] Furthermore, the structures described above, such as radio frames, subframes, time slots, mini-time slots, and symbols, are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, and cyclic prefix (CP) length can be varied in many ways.

[0251] Furthermore, the information, parameters, etc., described in this disclosure can be represented by absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0252] In this disclosure, the names used for parameters, etc., are not limiting names in any respect. Furthermore, the mathematical expressions, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name; therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0253] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be mentioned throughout the above description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0254] Furthermore, information, signals, etc., can be output in at least one of the following directions: from higher level (upper layer) to lower level (lower layer), and from lower layer to higher level. Information, signals, etc., can also be input and output via multiple network nodes.

[0255] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed using management tables. Input and output information, signals, etc., can be overwritten, updated, or appended. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0256] The notification of information is not limited to the methods / implementations described in this disclosure, and may also be carried out by other methods. For example, the notification of information in this disclosure may also be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB) etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0257] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0258] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information, or by providing other information).

[0259] The determination can be made by a value represented by a single bit (0 or 1), by a true or false value (boolean), or by a numerical comparison (e.g., a comparison with a specific value).

[0260] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted to refer to instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0261] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0262] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0263] In this disclosure, the terms "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "transmission configuration indication state (TCI state)", "spatial relation", "spatial domain filter", "transmit power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beamwidth", "beam angle", "antenna", "antenna element", and "panel" are used interchangeably.

[0264] In this disclosure, the terms "Base Station (BS)", "Wireless Base Station", "Fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access Point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Panel", "Cell", "Sector", "Cell Group", "Carrier", and "Component Carrier" are used interchangeably. There are also instances where the terms macro cell, small cell, femtocell, and picocell are used to refer to a base station.

[0265] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0266] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” are used interchangeably.

[0267] There are also instances where mobile stations are referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms.

[0268] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0269] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, it can also be configured such that the user terminal 20 has the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can also be replaced with sidelink channel.

[0270] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, it can also be configured such that the base station 10 has the functions of the user terminal 20 described above.

[0271] In this disclosure, actions purported to be performed by the base station are sometimes also performed by its upper node, depending on the circumstances. Clearly, in a network containing one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (e.g., considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited to these), or combinations thereof.

[0272] The various methods / implementations described in this disclosure can be used individually or in combination, and can be switched as needed during execution. Furthermore, the processing procedures, sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as they do not contradict each other. For example, with respect to the methods described in this disclosure, the illustrated order is used to indicate various steps, but the order in which they are indicated is not limited.

[0273] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future generation radio access (FX), Global System for Mobile Communications (GSM (registered trademark))), CDMA2000, Ultra Mobile Broadband (UMB), IEEE This includes 802.11 (Wi-Fi, registered trademark), IEEE 802.16 (WiMAX, registered trademark), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (registered trademark), systems utilizing other suitable wireless communication methods, and next-generation systems derived from them. Furthermore, multiple systems can be combined (e.g., LTE or LTE-A, combinations with 5G, etc.) for application.

[0274] As used in this disclosure, the term "based on" does not mean "based on only" unless otherwise specified. In other words, the term "based on" means both "based on only" and "based on at least".

[0275] Any reference to an element using the designations "first," "second," etc., as used in this disclosure does not comprehensively limit the quantity or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, reference to the first and second elements does not imply that only two elements may be used, or that the first element must take precedence over the second element in some form.

[0276] The term "determining" as used in this disclosure can encompass a wide variety of actions. For example, "determining" can also refer to judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining.

[0277] In addition, "judgment (decision)" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, accessing (e.g., accessing data in memory), etc., as situations where "judgment (decision)" is performed.

[0278] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, or comparing are considered as making a "judgment (decision)". In other words, "judgment (decision)" can also refer to certain actions as situations where a "judgment (decision)" is made.

[0279] In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0280] The term "maximum transmit power" as used in this disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0281] As used in this disclosure, the terms "connected," "coupled," or any variations thereof, refer to all direct or indirect connections or combinations between two or more elements, and can include cases where there is one or more intermediate elements between two mutually "connected" or "coupled" elements. The connections or combinations between elements can be physical, logical, or a combination thereof. For example, "connected" can also be replaced with "access."

[0282] In this disclosure, when two elements are connected, it is possible to use more than one wire, cable, printed electrical connection, etc., and to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region as several non-limiting and non-inclusive examples, so that they are "connected" or "combined" with each other.

[0283] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0284] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," mean inclusive. Furthermore, the term "or" as used in this disclosure does not mean XOR.

[0285] In this disclosure, for example, in cases where articles are added through translation, such as a, an, and the in English, the disclosure may also include cases where the noun following these articles is in a plural form.

[0286] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented in modified and altered ways without departing from the spirit and scope of the invention as defined by the claims. Therefore, the description in this disclosure is for illustrative purposes only and is not intended to limit the invention in any way.

Claims

1. A terminal, comprising: The receiving unit receives the Radio Resource Control (RRC) parameters for each cell group, corresponding to the beam-specific Maximum Permissible Exposure (MPE) report; and The control unit, when the RRC parameters corresponding to the beam-specific MPE report are set, controls the transmission of the beam-specific MPE report using the Power Headroom Report Media Access Control (PHR MAC CE) control element. When both the RRC parameter corresponding to the terminal-specific MPE report and the RRC parameter corresponding to the beam-specific MPE report are set, the control unit controls the transmission of both the terminal-specific MPE report and the beam-specific MPE report.

2. The terminal according to claim 1, wherein, The terminal also includes a transmitting unit that transmits capability information indicating whether the beam-specific MPE report is supported.

3. The terminal according to claim 1 or claim 2, wherein, In the PHR MAC CE, the number of octets is the same in different serving cells.

4. The terminal according to claim 1 or 2, wherein, The PHR MAC CE contains one or more beam-specific MPE reports, and the size of the PHR MAC CE is variable.

5. A wireless communication method for a terminal, comprising: The steps for receiving the radio resource control parameters (RRC parameters) for each cell group corresponding to the beam-specific maximum permissible exposure report, i.e., the beam-specific MPE report; When the RRC parameters corresponding to the beam-specific MPE report are set, the steps for controlling the transmission of the beam-specific MPE report using the Power Headroom Report Media Access Control (PHR MAC CE) control element are as follows: The steps involve controlling the transmission of both the terminal-specific MPE report and the beam-specific MPE report when both RRC parameters corresponding to the terminal-specific MPE report and the beam-specific MPE report are set.

6. A base station, comprising: The transmitting unit transmits the Radio Resource Control (RRC) parameters for each cell group, corresponding to the beam-specific Maximum Allowable Exposure Report (MPE report); and The control unit controls the reception of the beam-specific MPE report, which is transmitted based on the RRC parameters corresponding to the beam-specific MPE and uses the Power Headroom Report Media Access Control (PHR MAC CE) control element. When both the RRC parameters corresponding to the terminal-specific MPE report and the RRC parameters corresponding to the beam-specific MPE report are set, the control unit controls the reception of both the terminal-specific MPE report and the beam-specific MPE report.

7. A system comprising a terminal and a base station, The terminal has: The receiving unit receives the Radio Resource Control (RRC) parameters for each cell group, corresponding to the beam-specific Maximum Permissible Exposure (MPE) report; and The control unit, when the RRC parameters corresponding to the beam-specific MPE report are set, controls the transmission of the beam-specific MPE report using the Power Headroom Report Media Access Control (PHR MAC CE) control element. When both the RRC parameters corresponding to the terminal-specific MPE report and the RRC parameters corresponding to the beam-specific MPE report are set, the control unit controls the transmission of both the terminal-specific MPE report and the beam-specific MPE report. The base station has: The control unit controls the reception of beam-specific MPE reports.

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