Terminal, wireless communication method, base station and system

Abstract

A terminal according to an aspect of the present disclosure is characterized by comprising: a reception unit that receives an upper layer parameter corresponding to a report related to the maximum permissible exposure inherent in a beam; and a control unit that controls, on the basis of the upper layer parameter, the transmission of the report using a medium access control (MAC) control element (CE). According to an aspect of the present disclosure, reporting related to MPE can be appropriately performed.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

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

[0004] In existing LTE systems (e.g., 3GPP Rel. 8-14), a user equipment (User Equipment (UE)) transmits uplink control information (Uplink Control Information (UCI)) using at least one of an UL data channel (e.g., a Physical Uplink Shared Channel (PUSCH)) and an UL control channel (e.g., a Physical Uplink Control Channel (PUCCH)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0006] In NR, the issue of Maximum Permitted Exposure (MPE) is being considered. UE is required to meet Federal Communication Commission (FCC) regulations on maximum radiation to the human body for health and safety reasons.

[0007] To address the MPE issue, it is possible to report the MPE of the UL transmission beam. However, there is no consideration on how to report the MPE when a UE uses multiple transmission beams. If the MPE is not reported properly, system performance such as throughput may be degraded.

[0008] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately report on MPE. [Means for solving the problem]

[0009] A terminal according to an embodiment of the present disclosure provides beam-specific Maximum Permitted Exposure (MPE) reporting. Corresponding to A receiving unit for receiving Radio Resource Control (RRC) parameters for each cell group; Supports beam-specific MPE reporting RRC parameters If set,A control unit that controls the transmission of the beam-specific MPE report using a Power Headroom Reporting (PHR) medium access control (MAC) control element (CE); and when both an RRC parameter corresponding to a terminal-specific MPE report and an RRC parameter corresponding to the beam-specific MPE report are set, the control unit controls transmission of both the terminal-specific MPE report and the beam-specific MPE report. It is characterized by: Effect of the Invention

[0010] According to one aspect of the present disclosure, reporting on MPE can be performed appropriately. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of a single-entry PHR MAC CE in Rel.16. [Diagram 2] FIG. 2 is a diagram showing a first example of a multi-entry PHR MAC CE in Rel.16. [Diagram 3] FIG. 3 is a diagram showing a second example of a multi-entry PHR MAC CE in Rel.16. [Figure 4] FIG. 4 is a diagram showing an example of a PHR MAC CE used for beam-specific MPE reporting. [Diagram 5] FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (MPE) In NR, the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure) is being considered. UE is required to meet the Federal Communication Commission (FCC) regulations on maximum radiation to the human body for health and safety. For example, Rel.15 NR specifies the following two restriction methods for limiting exposure:

[0013] <Restriction method 1> As a first restriction method, a restriction using power management maximum power reduction (P-MPR) is specified. For example, when 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 so as to satisfy the following formula (1). 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)

[0014] EIRP max is the maximum value of the corresponding measured peak equivalent isotopically radiated power (EIRP). f,c Let P-MPR be a value that indicates the reduction in maximum output power allowed for carrier f of serving cell c. f,c is the configured UE maximum output power P CMAX,f,cThis allows the UE to report the maximum available output transmit power to the base station (e.g., gNB). This report can be used by the base station for scheduling decisions. P-MPR f,c may be used to ensure compliance with available electromagnetic energy absorption requirements in cases of simultaneous transmission on multiple RATs for scenarios not within the scope of 3GPP RAN use, to address unwanted emissions / self-protection requirements, and in cases where proximity detection is used to address requirements requiring lower maximum output power.

[0015] <Restriction method 2> In 3GPP Rel.15 NR, in order to satisfy the millimeter wave human body protection guidelines, UE capability information is introduced to notify the uplink transmission rate that the UE can transmit without requiring the application of P-MPR. The capability information may be called the maximum uplink duty cycle in Frequency Range 2 (FR2) (maxUplinkDutyCycle-FR2).

[0016] maxUplinkDutyCycle-FR2 corresponds to a higher layer parameter. maxUplinkDutyCycle-FR2 may be an upper limit of the UL transmission ratio within a certain evaluation period (e.g., 1 second). In Rel.15 NR, this value is one of n15, n20, n25, n30, n40, n50, n60, n70, n80, n90, and n100, which correspond to 15%, 20%, 25%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively. maxUplinkDutyCycle-FR2 may be applied to all UE power classes of FR2. Note that no default value may be specified for maxUplinkDutyCycle-FR2.

[0017] As UE capability information, there is a field of maxUplinkDutyCycle-FR2. If the ratio of UL (Uplink) symbols transmitted within an evaluation period of 1 second is greater than maxUplinkDutyCycle-FR2, the UE may apply the restriction using P-MPR (restriction method 1) according to UL scheduling. Otherwise, the UE may not apply P-MPR.

[0018] If there is no field of maxUplinkDutyCycle-FR2 as UE capability information, compliance with the electromagnetic power density exposure requirement (MPE requirement) may be ensured by reducing the power density or other means.

[0019] <MPE report> For a UE equipped with multiple panels (multi-panel), in order to quickly select the UL panel, it is being considered to promote UL transmission beam selection based on the UL beam indication while taking into account the UL coverage loss caused by MPE.

[0020] However, the problems are how to speed up the selection of the beam / panel based on MPE and how to notify the NW of the selection in order to avoid blind detection by the network. If the beam / panel selection based on MPE is not performed quickly, there is a risk of degrading system performance such as a throughput decrease. Also, if the UE spontaneously changes the UL transmission beam and the network is unaware of the changed UL transmission beam, the network will perform blind detection to determine the UL reception beam, which may lead to a degradation in system performance such as a throughput decrease.

[0021] Therefore, it is conceivable that the UE reports that the uplink transmission beam does not meet the maximum allowable exposure (MPE) requirement.

[0022] If the UE is configured for UE-triggered reporting for MPE problems (e.g., by RRC layer signaling) and the UE detects an MPE problem for a designated UL beam, the UE may report the occurrence of an MPE problem.

[0023] In this disclosure, MPE event, MPE problem, MPE failure, not satisfying MPE requirements, and inability to pass MPE requirements may be read as interchangeable. In this disclosure, MPE safe, MPE conformance, no MPE problem occurs, no MPE failure occurs, satisfying MPE requirements, and being able to pass MPE requirements may be read as interchangeable. In this disclosure, report of occurrence of MPE problem, report of MPE problem, first report, and request for recovery (resolution) of MPE problem may be read as interchangeable.

[0024] The UE may detect (determine) an MPE problem when an indicated UL transmission beam or reference signal (RS) for UL transmission (e.g., PUSCH) does not meet the MPE requirement (power parameters for the indicated UL transmission beam do not meet the MPE requirement). The indication of the UL transmission beam may be an SRS resource indicator (SRI) indicating a sounding reference signal (SRS) resource for the PUSCH, or may be spatial relationship information or a transmission configuration indicator (TCI) state or quasi co-location (QCL) assumption for at least one of the PUCCH, the PUSCH, the SRS, and the PRACH.

[0025] An MPE requirement may be to satisfy at least one of the following: · P-MPR required considering MPE f,c is greater than the P-MPR threshold. P calculated taking into account MPE CMAX,f,c(the maximum output power configured in the UE for carrier f of serving cell c) is P CMAX Less than the threshold. ·The Power Headroom (PH) value (e.g., real PH, virtual PH) calculated taking into account the MPE is smaller than the PH threshold.

[0026] P-MPR threshold, P CMAX At least one of the thresholds, the PH threshold, may be predefined or set.

[0027] In response to detecting the MPE problem, the UE may report the MPE problem occurrence.

[0028] In response to detection of an occurrence of an MPE problem, the UE may determine and report a UL transmission beam / panel that satisfies the MPE requirements. In this disclosure, the UL transmission beam / panel that satisfies the MPE requirements, the MPE-compliant beam / panel, the MPE-safe beam / panel, the candidate beam / panel, and the new UL transmission beam / panel may be read as interchangeable. In this disclosure, the MPE-compliant beam / panel report, the MPE-compliant beam / panel list, and the UL transmission beam / panel change plan may be read as interchangeable.

[0029] The UE may report at least one determined MPE compatible beam / panel and manage the UL beam.

[0030] <New MAC CE> A new Medium Access Control Element (MAC CE) with a new logical channel ID (LCID) may be defined for reporting at least one of the occurrence of an MPE problem and information about a beam / panel that satisfies the MPE requirements for one or more cells and BWP (MPE-compliant beam / panel). The new MAC CE may indicate at least one of a new UL transmission beam / panel and a cell where an MPE problem has occurred. The new MAC CE may include at least one of the following contents 1 to 8.

[0031] [Contents 1] A 0 or 1 bit field for each cell / BWP to indicate an MPE problem. The MAC CE may contain fields for one or more cells / BWPs. The MAC CE may contain a cell / BWP index.

[0032] [Content 2] For one cell / BWP where an MPE problem was detected, the index of the MPE-qualified beam / panel, 1 or more, up to N.

[0033] [Content 3] Indices of MPE compatible beams / panels for the plurality of cells / BWPs in which an MPE problem was detected. The MAC CE may include one or more, or up to N, indices of MPE compatible beams / panels for each of the plurality of cells / BWPs.

[0034] [Content 4] At least one of contents 1, 2, 3 plus the required P-MPR for each beam / panel index.

[0035] [Contents 5] In addition to at least one of the contents 1, 2, and 3, the remaining power estimated considering P-MPR for each beam / panel index (the remaining power estimated considering MPE). The estimated remaining power may be a PH value based on the actual transmission or reference format (virtual transmission) considering MPE, or it may be a Power Headroom Reporting (PHR) considering MPE for each beam. The PHR is the content (PH type, PH value, P-MPR) in the PHR MAC CE. CMAX,f,c At least one of the above may be included.

[0036] [Content 6] In addition to at least one of contents 1, 2, and 3, for each beam / panel index, the calculated P CMAX,f,c .

[0037] [Content 7] A combination of 2 or more of contents 1 to 6.

[0038] [Content 8] A field (bit) indicating that no MPE compatible beam / panel was found for the cell / BWP based on content 7.

[0039] The beam / panel index may be an SSB / CSI-RS / SRS index, or the beam / panel index may be set together with the SSB / CSI-RS / SRS index. The panel index may be an RS group / RS set index, an antenna port / antenna port group / antenna port set index, an antenna assumption / antenna mode index, or any other new index.

[0040] <PHR MAC CE> In 3GPP Rel.16, mpe-Reporting, mpe-ProhibitTimer, and mpe-Threshold are defined as RRC parameters for controlling PHR. mpe-Reporting indicates whether the UE reports MPE P-MPR in the PHR MAC CE. mpe-ProhibitTimer is a timer that starts when the MPE P-MPR report is triggered, and indicates the number of subframes. mpe-Threshold indicates the P-MPR threshold [dB] for the MPE P-MPR report when FR2 is configured.

[0041] A PHR is triggered if mpe-Reporting is configured, the mpe-ProhibitTimer is not running, and the measured P-MPR applied to meet the MPE requirements in at least one activated serving since the last transmission of a PHR at the MAC entity is greater than or equal to the mpe-Threshold.

[0042] MPE P-MPR reporting is triggered when mpe-Reporting is set, mpe-ProhibitTimer is not running, and the measured P-MPR applied to meet the MPE requirements in at least one activated serving is greater than or equal to mpe-Threshold.

[0043] If 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, which may be either a multi-entry PHR MAC CE (multi-PHR) or a single-entry PHR MAC CE (single-PHR).

[0044] 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, which is included in the PHR MAC CE.

[0045] FIG. 1 shows an example of a single-entry PHR MAC CE in Rel. 16. The "P" field indicates the power backoff applied to meet MPE requirements if mpe-Reporting is set, and indicates whether the MAC entity (UE) applies power backoff due to power management if mpe-Reporting is not set. CMAX,f,c The " field is the P value used in the calculation of the previous PH field. CMAX,f,c"R" indicates a reserved bit. "PH" field indicates the power headroom level. "P" field indicates the power backoff applied to meet the MPE requirements when mpe-Reporting is set. "MPE" field indicates the power backoff applied to meet the MPE requirements when mpe-Reporting is set and the "P" field is set to 1. The "MPE" field is a reserved bit (R) when mpe-Reporting is not set or when the "P" field is set to 0.

[0046] 2 is a diagram showing a first example of a multi-entry PHR MAC CE in Rel. 16. The example in Fig. 2 is applied to a case where the largest serving cell index among the serving cells configured for the uplink is less than 8.

[0047] Fig. 3 is a diagram showing a second example of a multi-entry PHR MAC CE in Rel. 16. The example in Fig. 3 is applied to a case where the largest serving cell index among the serving cells configured for the uplink is 8 or more.

[0048] "C" in Figures 2 and 3 i The "PH" 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 the reference format. In the examples of Figures 2 and 3, each field shown in Figure 1 ("P", "R", "PH", "P CMAX,f,c ", "MPE") is set for each serving cell.

[0049] As described above, in order to deal with the MPE problem, it is possible for the UE to transmit a report on the MPE of the UL transmission beam. However, there is no consideration on how to report on the MPE when the UE uses multiple transmission beams / panels. If the MPE report is not performed appropriately, there is a risk that system performance such as throughput will be degraded.

[0050] Therefore, the present inventors have conceived of a terminal that can appropriately report on MPE when a UE uses multiple transmission beams / panels.

[0051] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0052] In the present disclosure, "A / B / C" and "at least one of A, B, and C" may be read as interchangeable. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band may be read as interchangeable. In the present disclosure, index, ID, indicator, and resource ID may be read as interchangeable. In the present disclosure, support, control, controllable, operate, and operable may be read as interchangeable.

[0053] In the present disclosure, the terms configure, activate, update, indicate, enable, specify, and select may be read as interchangeable.

[0054] In the present disclosure, MAC CE and activation / deactivation command may be read as interchangeable.

[0055] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof. In the present disclosure, RRC, RRC signaling, RRC parameters, higher layer, higher layer parameters, RRC information elements (IEs), and RRC messages may be read as interchangeable.

[0056] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0057] In the present disclosure, beam, panel, spatial domain filter, spatial setting, TCI state, TCI state pool, multiple TCI states, UL TCI state, unified TCI state, unified beam, common TCI state, common beam, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, RS of QCL type D in TCI state / QCL assumption, RS of QCL type A in TCI state / QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, PL-RS, may be read as interchangeable. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS, SRS, may be read as interchangeable.

[0058] (Wireless communication method) 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 the report using a MAC CE (PHR MAC CE) based on the higher layer parameters. Hereinafter, the names of the RRC parameters corresponding to the beam-specific MPE report are referred to as "new-mpe-Reporting", "new-mpe-ProhibitTimer", and "new-mpe-Threshold", although other names may be used.

[0059] In the present disclosure, the terms beam, panel, beam and panel may be interchangeable. In the present disclosure, the terms MPE, MPE P-MPR, and P-MPR may be interchangeable.

[0060] <First embodiment> An RRC parameter new-mpe-Reporting may be defined to indicate whether to send a beam-specific MPE report. If new-mpe-Reporting is configured, the UE performs beam-specific P-MPR measurements to meet the MPE requirements and triggers a beam-specific MPE report.

[0061] As an RRC parameter corresponding to a beam-specific MPE report, a timer new-mpe-ProhibitTimer may be configured, which is executed when an MPE report is triggered. Multiple new-mpe-ProhibitTimers may be configured, each associated with a beam. When an MPE report is triggered for a beam, the new-mpe-ProhibitTimer associated with the beam of the corresponding UE may be started or restarted, and the triggered MPE P-MPR report for the beam of the serving cell included in the PHR MAC CE or the new MPE MAC CE may be canceled. The new MPE MAC CE may be, for example, a MAC CE as shown in the third embodiment described later.

[0062] As an RRC parameter corresponding to beam-specific MPE reporting, new-mpe-Threshold, which is a threshold corresponding to the power management maximum power reduction (P-MPR) of the beam, may be configured and applied to all configured beams.

[0063] Multiple new-mpe-Thresholds may be configured, each associated with a beam. The UE may compare the measured beam-specific P-MPR with the corresponding (associated) new-mpe-Threshold to meet the MPE requirement.

[0064] For example, a PHR may be triggered if new-mpe-Reporting is configured, new-mpe-ProhibitTimer is not running, and the P-MPR of a beam, applied and measured to meet the MPE requirements in at least one activated serving since the last transmission of a PHR at the MAC entity, is greater than or equal to the new-mpe-Threshold of the corresponding beam.

[0065] <Second embodiment> The following describes a setting aspect of beam-specific RRC parameters, and a relationship between a UE-specific MPE report and a beam-specific MPE report. For example, the beam-specific RRC parameters may be set for each UE (terminal), for each cell group, for each serving cell, or for each bandwidth part (BWP). The beam-specific RRC parameters in each aspect of this embodiment may be at least one of new-mpe-Reporting, new-mpe-ProhibitTimer, and new-mpe-Threshold shown in the first embodiment.

[0066] In the present disclosure, the RRC parameters (RRC parameters corresponding to the MPE report), the MPE report, the P-MPR report, and the MPE P-MPR report may be read as interchangeable.

[0067] [Aspect 2-1] Beam-specific RRC parameters may be configured per UE and apply to all FR2 serving cells.

[0068] [Aspect 2-2] Beam-specific RRC parameters may be configured for each UE's cell group (Master cell group (MCG) / Secondary cell group (SCG) / PUCCH cell group) and applied to all serving cells within the configured cell group.

[0069] [Aspect 2-3] Beam-specific RRC parameters are configured for each serving cell of the UE, and different parameters may be configured for different serving cells.

[0070] [Aspect 2-4] Beam-specific RRC parameters are configured for each BWP in the serving cell of the UE, and different parameters may be configured for different BWPs.

[0071] Regarding the relationship between UE specific MPE reporting and beam specific MPE reporting, the following examples of aspects A to D will be described. Any of aspects A to D may be combined with any of aspects 2-1 to 2-4. The RRC parameter corresponding to the UE specific MPE reporting may be at least one of mpe-Reporting, mpe-ProhibitTimer, and mpe-Threshold of 3GPP Rel.16 described above. The UE specific MPE reporting may be, for example, a report by the MAC CE shown in Figs. 1 to 3.

[0072] [Aspect A] The UE may be configured with either UE-specific MPE reporting or beam-specific MPE reporting. If beam-specific MPE reporting is configured, the UE may not assume that UE-specific MPE reporting is configured. If UE-specific MPE reporting is configured, the UE may not assume that beam-specific MPE reporting is configured.

[0073] When aspect 2-1 is applied, the UE may be configured with either a UE-specific MPE report or a beam-specific MPE report and may transmit either one of the reports. When aspect 2-2 is applied, the same MPE report (UE-specific or beam-specific) may be configured for different cell groups. When aspect 2-3 is applied, the same MPE report (UE-specific or beam-specific) may be configured for different cells (serving cells). When aspect 2-4 is applied, the same MPE report (UE-specific or beam-specific) may be configured for different BWPs in a serving cell.

[0074] [Aspect B] The UE may be configured with both a UE-specific MPE report and a beam-specific MPE report and may transmit both reports. The UE may be configured with different MPE reports for different cells / cell groups / BWPs. When aspect 2-2 is applied, different MPE reports (UE-specific or beam-specific) may be configured for different cell groups. When aspect 2-3 is applied, different MPE reports (UE-specific or beam-specific) may be configured for different cells (serving cells). When aspect 2-4 is applied, different MPE reports (UE-specific or beam-specific) may be configured for different BWPs.

[0075] [Aspect C] The UE may be configured with both UE-specific MPE reporting and beam-specific MPE reporting and may send both reports. The UE may be configured with the same MPE reporting for different cells / cell groups / BWPs. The UE may determine (select) at least one of the UE-specific MPE reporting and beam-specific MPE reporting based on the UE implementation or a predetermined rule (specification) when the PHR or P-MPR reporting is triggered. The UE may apply the beam-specific MPE reporting when both the UE-specific MPE reporting and beam-specific MPE reporting are configured.

[0076] [Aspect D] In aspects A / B / C, further conditions based on additional settings may be used for the UE as to whether to apply UE-specific MPE reporting or beam-specific MPE reporting.

[0077] The UE may send a UE-specific MPE report using the MAC CE if at least one of the following conditions (1) and (2) is met. (1) PHR was triggered. (2) Beam-specific MPE reporting is not triggered.

[0078] Only if a beam-specific MPE report is triggered, the UE may send the beam-specific MPE report using the MAC CE.

[0079] In beam-specific MPE reporting, if multiple (all) beams are triggered, a UE-specific MPE report may be included in the MAC CE.

[0080] [Trigger condition] In a case where the trigger conditions (detection conditions of MPE problem) for UE-specific MPE reporting (mpe-Reporting) and beam-specific MPE reporting (new-mpe-Reporting) are different due to different metrics or thresholds for detecting MPE problems (mpe-Threshold / new-mpe-Threshold), the UE may follow the following procedure.

[0081] When either of the RRC parameters mpe-Reporting and new-mpe-Reporting is set (detected), the UE starts the corresponding MPE procedure #1, and then when another parameter of mpe-Reporting and new-mpe-Reporting (corresponding to another MPE procedure #2) is set (detected), the UE performs one of the following processes (1) to (4). The MPE procedures #1 and #2 are, for example, a UE-specific MPE reporting (mpe-Reporting) procedure or a beam-specific MPE reporting (new-mpe-Reporting) procedure.

[0082] (1) The UE continues with the already started MPE procedure #1 and ignores another MPE procedure #2.

[0083] (2) The UE terminates the already started MPE procedure #1 and starts another MPE procedure #2.

[0084] (3) The UE may determine whether to continue or terminate the already started MPE procedure #1 depending on whether the already started MPE procedure #1 is new-mpe-Reporting or mpe-Reporting. For example, the UE may continue the MPE procedure #1 if the already started MPE procedure #1 is new-mpe-Reporting. The UE may terminate the MPE procedure #1 if the already started MPE procedure #1 is mpe-Reporting.

[0085] (4) The UE may decide whether to continue or terminate the already started MPE procedure #1 depending on whether the MPE procedure #2 corresponding to another detected MPE problem is new-mpe-Reporting or mpe-Reporting. For example, the UE may terminate MPE procedure #1 if MPE procedure #2 is new-mpe-Reporting. The UE may continue MPE procedure #1 if MPE procedure #2 is mpe-Reporting.

[0086] The trigger conditions for mpe-Reporting and new-mpe-Reporting may be the same. In this case, the UE may select one of mpe-Reporting and new-mpe-Reporting based on a predetermined rule (specification). For example, the trigger condition for UE-specific MPE reporting is that the P-MPR measured to meet the MPE requirement is equal to or greater than mpe-Threshold. The trigger condition for panel-specific MPE reporting is that the P-MPR of the panel measured to meet the MPE requirement is greater than new-mpe-Threshold. Therefore, when simultaneous transmission from multiple panels is not performed and mpe-Threshold and new-mpe-Threshold are the same, the trigger conditions for mpe-Reporting and new-mpe-Reporting are the same.

[0087] <Third embodiment> For beam-specific MPE reporting, the same set of octets (8-bit fields) as the single-entry or multi-entry PHR MAC CE in Rel.16 shown in Figures 1 to 3 may be used. For example, each set (entry) of PHR MAC CE may correspond to a beam / panel in the serving cell.

[0088] [Aspect 3-1] If beam-specific MPE reporting is triggered for a serving cell, information of all beams of the serving cell may be reported in a specific order. The size of the MAC CE may be related to the maximum number of panels (maximum number of UL panels) in the serving cell / cell group / FR / UE. In this case, the UE does not need to report the beam ID / panel ID since it is determined by the order of the entries in the MAC CE.

[0089] FIG. 4 is a diagram showing an example of a PHR MAC CE used for beam-specific MPE reporting. In the example of FIG. 4, the PHR MAC CE includes MPE reporting for panels #0 to #2. That is, MPE reporting for up to three panels is possible. Two octets are used for one panel. Panels #0 to #2 may be replaced for beams #0 to #2.

[0090] [Aspect 3-2] When a beam-specific MPE P-MPR report is triggered for a serving cell, only one beam / panel information may be reported, or MPE reporting for multiple (part of) beams / panels may be performed based on the conditions defined in the specification. In this case, the size of the MAC CE is variable.

[0091] Also, the size of the beam ID / panel ID / MAC CE may be added to the MAC CE. As the field of the size of the beam ID / panel ID / MAC CE, at least one of the P field and the R field, or at least one value represented by at least one of the P field and the R field may be reused, or a new field may be added. By including the beam ID / panel ID, even if multiple (part of) beams / panels are reported, the beam / panel can be identified. By including the size of the MAC CE, even if the size of the MAC CE is variable, the size can be identified. In addition, in aspect 3-2, since only the beam / panel to which the power backoff is applied is reported in the MAC CE, it is not necessary to indicate the power backoff again in the P field. Whether to reuse an existing field or add a new field may be determined according to the maximum number of panels of the UE. The UE may determine the beam / panel to be reported according to the following condition 1 or condition 2.

[0092] [[Condition 1]] An MPE report may be sent only for a beam if the P-MPR of that beam, as applied and measured to meet the MPE requirement, is greater than or equal to the new-mpe-Threshold of the corresponding beam.

[0093] [[Condition 2]] Together with one or more beams corresponding to P-MPRs above new-mpe-Threshold, the UE may report at least one MPE safe beam (if any). The MPE safe beam is, for example, one or more beams corresponding to P-MPRs less than new-mpe-Threshold.

[0094] The number of sets of octets of PHR MAC CE in different serving cells may be the same or different. For example, when UE-specific MPE is set in one serving cell and panel-specific MPE is set in another serving cell, the number of sets of octets of PHR MAC CE used for MPE reporting in each serving cell may be different. When the maximum number of panels in each serving cell is different, or when each serving cell reports the influence of a different number of panels, the number of sets of octets of PHR MAC CE used for MPE reporting may be different.

[0095] <UE capability> The UE may transmit (report) UE capabilities indicating whether it supports beam-specific MPE reporting for each UE / each cell group / each serving cell. The UE may transmit (report) UE capabilities indicating whether it supports beam-specific new-mpe-ProhibitTimer for each UE / each cell group / each serving cell. The UE may transmit (report) UE capabilities indicating whether it supports beam-specific new-mpe-Threshold for each UE / each cell group / each serving cell.

[0096] The UE may send (report) a UE capability indicating whether both UE-specific MPE reporting and beam-specific are configured for the same cell / cell group (or different cells / cell groups). The UE may send (report) a UE capability indicating whether to send beam-specific MPE reporting for all beams. The UE may send (report) a UE capability indicating whether to report beam ID / panel ID in the MAC CE for beam-specific MPE reporting.

[0097] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0098] 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0099] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of 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 the like.

[0100] 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.

[0101] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0102] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0103] 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).

[0104] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0105] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0106] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0107] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0108] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0109] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), 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.

[0110] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0111] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0112] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0113] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0114] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0115] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0116] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0117] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0118] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0119] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0120] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0121] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0122] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0123] (base station) 6 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0124] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0125] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0126] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0127] The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure.

[0128] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0129] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0130] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0131] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0132] The transceiver 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.

[0133] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0134] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0135] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0136] The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.

[0137] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110.

[0138] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0139] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0140] In addition, the transceiver unit 120 may transmit upper layer parameters corresponding to a report regarding beam-specific maximum acceptable exposure, and receive the report using a medium access control (MAC) control element (CE) transmitted based on the upper layer parameters.

[0141] The control unit 110 may control reception of the report using a medium access control (MAC) control element (CE), transmitted based on the higher layer parameters.

[0142] (User terminal) 7 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0143] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0144] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0145] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0146] 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 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0147] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0148] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0149] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0150] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0151] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0152] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0153] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0154] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0155] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0156] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0157] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0158] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0159] In addition, the transceiver 220 may receive upper layer parameters corresponding to a report on beam-specific maximum acceptable exposure, and transmit the report using a medium access control (MAC) control element (CE) based on the upper layer parameters.

[0160] The higher layer parameters may include at least one of a parameter indicating whether to transmit the report, a timer to be executed when the report is triggered, and a threshold corresponding to a power management maximum power reduction of the beam. The higher layer parameters may be configured per terminal, per cell group, per serving cell, or per bandwidth portion.

[0161] The controller 210 may control the transmission of the report using a medium access control (MAC) control element (CE) based on the higher layer parameters. The controller 210 may control the transmission of both the beam-specific maximum acceptable exposure report and the terminal-specific maximum acceptable exposure report.

[0162] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0163] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0164] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 8 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0165] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0166] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0167] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0168] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0169] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0170] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0171] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile 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 referred to as an auxiliary storage device.

[0172] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0173] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0174] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0175] 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), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0176] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0177] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0178] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0179] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0180] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0181] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0182] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0183] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0184] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0185] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0186] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0187] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0188] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0189] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0190] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0191] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0192] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0193] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0194] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0195] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0196] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0197] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0198] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. 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 voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0199] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0200] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0201] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0202] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0203] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0204] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0205] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0206] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0207] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0208] 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," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0209] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0210] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0211] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0212] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0213] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. 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.

[0214] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0215] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0216] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0217] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0218] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0219] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0220] Any reference to an element using a designation such as "first," "second," etc., 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 method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0221] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0222] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0223] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0224] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0225] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0226] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0227] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0228] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0229] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0230] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0231] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiver for receiving per-cell-group Radio Resource Control (RRC) parameters corresponding to beam-specific Maximum Permitted Exposure (MPE) reporting; A control unit that controls transmission of the beam-specific MPE report using a Power Headroom Reporting (PHR) medium access control (MAC) control element (CE) when an RRC parameter corresponding to the beam-specific MPE report is set, The control unit controls transmission of both the terminal-specific MPE report and the beam-specific MPE report when both an RRC parameter corresponding to the terminal-specific MPE report and an RRC parameter corresponding to the beam-specific MPE report are set. Terminal.

2. The method further includes a transmitting unit for transmitting capability information indicating whether the beam-specific MPE report is supported. The terminal according to claim 1.

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

4. The PHR MAC CE includes one or more beam-specific MPE reports, and the size of the PHR MAC CE is variable. A terminal according to any one of claims 1 to 3.

5. receiving per-cell-group Radio Resource Control (RRC) parameters corresponding to beam-specific Maximum Permitted Exposure (MPE) reporting; controlling transmission of the beam-specific MPE report using a Power Headroom Reporting (PHR) medium access control (MAC) control element (CE) when RRC parameters corresponding to the beam-specific MPE report are configured; controlling 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 configured; A wireless communication method for a terminal having the above configuration.

6. a transmitter for transmitting per-cell-group Radio Resource Control (RRC) parameters corresponding to beam-specific Maximum Permitted Exposure (MPE) reporting; and a control unit for controlling reception of the beam-specific MPE report using a Power Headroom Reporting (PHR) medium access control (MAC) control element (CE), the PHR being transmitted based on an RRC parameter corresponding to the beam-specific MPE report; The control unit controls transmission of both the terminal-specific MPE report and the beam-specific MPE report when both an RRC parameter corresponding to the terminal-specific MPE report and an RRC parameter corresponding to the beam-specific MPE report are set. Base station.

7. A system including a terminal and a base station, The terminal includes: a receiver for receiving per-cell-group Radio Resource Control (RRC) parameters corresponding to beam-specific Maximum Permitted Exposure (MPE) reporting; A control unit that controls transmission of the beam-specific MPE report using a Power Headroom Reporting (PHR) medium access control (MAC) control element (CE) when an RRC parameter corresponding to the beam-specific MPE report is set, The control unit controls transmission of both the terminal-specific MPE report and the beam-specific MPE report when both an RRC parameter corresponding to a terminal-specific MPE report and an RRC parameter corresponding to the beam-specific MPE report are set; The base station, A control unit for controlling reception of the beam-specific MPE report. system.

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