Terminal, wireless communication method and system

Abstract

A terminal according to one embodiment of the present disclosure has: a control unit that, when a trigger event pertaining to a given panel occurs, triggers a Power Headroom Report (PHR) associated with the panel; and a transmission unit for transmitting a Medium Access Control (MAC) control element pertaining to the PHR that is triggered, the trigger event including an event in which a periodic timer associated with the panel expires. According to one embodiment of the present disclosure, it is possible to appropriately trigger and transmit the PHR associated with the panel.

Description

[Technical field]

[0001] The present disclosure relates to a terminal and a wireless communication method in a next-generation mobile communication system. allusion to law and systems. [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. [Prior art documents] [Non-patent literature]

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

[0005] In NR, a user terminal (User Equipment (UE)) transmits a Power Headroom Report (PHR) including information on the power headroom (PH) of each serving cell to the network. The network can use the PHR to control the uplink transmission power of the UE.

[0006] In addition, the NR is considering how to address the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure).

[0007] In addition, in NR, for UEs equipped with multiple panels, consideration is being given to prompting UL transmission beam selection based on UL beam instructions, taking into account UL coverage loss caused by MPE, in order to enable fast selection of UL panels.

[0008] However, because the current specifications do not take the panel into account properly, it is assumed that the PHR will be triggered in cases where it is not necessarily necessary. If the appropriate PHR is not transmitted, there is a risk that communication throughput, communication quality, etc. will deteriorate.

[0009] Therefore, the present disclosure provides a terminal and a wireless communication method that can appropriately trigger / transmit a PHR related to a panel. allusion to law One of the objectives of the present invention is to provide a system for [Means for solving the problem]

[0010] A terminal according to one embodiment of the present disclosure includes: A transmitter that reports information regarding the number of panels using capability information, a receiver that receives higher layer signaling regarding the number of panels to be notified by including it in a Medium Access Control control element (MAC CE), and a receiver that receives at least one of the multiple panels of the number of panels notified by the higher layer signaling. When the power management maximum power reduction (P-MPR) is higher than the threshold, The plurality of panelsa control unit for triggering a power headroom report (PHR) related to the The transmission unit includes: Regarding the PHR that is triggered The above MAC CE the MAC CE including information on a PHR for each panel in the plurality of panels of the number of panels notified by the higher layer signaling, and information on a maximum output power for each panel in the plurality of panels. Send R . Effect of the Invention

[0011] According to one aspect of the present disclosure, the PHR associated with the panel can be appropriately triggered / sent. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing an example of a PHR MAC CE in Rel.15 NR. [Diagram 2] 2A to 2D are diagrams showing an example of the configuration of a panel-specific PHR MAC CE. [Diagram 3] 3A and 3B are diagrams showing another example of the configuration of a panel-specific PHR MAC CE. [Figure 4] 4A to 4C are diagrams illustrating an example of control regarding a prohibition timer according to the second embodiment. [Diagram 5] 5A and 5B are diagrams illustrating an example of control regarding a periodic timer in the third embodiment. [Figure 6] 6A and 6B are diagrams illustrating another example of control regarding a periodic timer in the third embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 10] FIG. 10 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

[0013] (PHR) In NR, a UE transmits a Power Headroom Report (PHR) including information on the power headroom (PH) of each serving cell to the network. The network can use the PHR to control the uplink transmission power of the UE.

[0014] The PHR may be transmitted by Medium Access Control (MAC) signaling using a Physical Uplink Shared Channel (PUSCH). For example, the PHR is notified by using a PHR MAC Control Element (CE) included in a MAC Protocol Data Unit (PDU).

[0015] Figure 1 shows an example of PHR MAC CE in Rel.15 NR. Figure 1 shows a single entry PHR MAC CE. The MAC CE is composed of 2 octets (=16 bits). Each 'R' in Figure 1 indicates a 1-bit reserved field, and is set to a value of '0', for example.

[0016] 1, 'PH (Type 1, PCell)' indicates a 6-bit field, which indicates an index for a type 1 PH of a PCell (Primary Cell). The index for the PH is associated with a specific PH value (or level (dB)).

[0017] For example, Type 1 PH may be a PH that takes into account the PUSCH (e.g., taking into account only the power of the PUSCH), Type 2 PH may be a PH that takes into account the PUCCH (e.g., taking into account the power of both the PUSCH and the PUCCH), and Type 3 PH may be a PH that takes into account a sounding reference signal (SRS: Sounding Reference Signal) (e.g., taking into account the power of the PUSCH and the SRS).

[0018] 'P in Figure 1 CMAX,f,c ' indicates a 6-bit field, P used in the calculation of the PH field above. CMAX,f,c The index for the P CMAX,f,c The index for is associated with a specific UE transmit power level (dB). CMAX,f,c may be referred to as the configured maximum transmit power (maximum allowed transmit power) of the UE for serving cell c of carrier f. Hereinafter, P CMAX,f,c is simply P CMAX It can also be written as:

[0019] In addition, NR also supports a multiple entry PHR MAC CE that includes multiple pieces of data similar to the above-mentioned single entry (2 octets). The multiple entry PHR MAC CE may include a PH field for a PSCell (Primary Secondary Cell) or an SCell.

[0020] The network may transmit PHR configuration information regarding the conditions for triggering the PHR to the UE. Here, the PHR configuration information may include, for example, a prohibit timer, a periodic timer, a path loss change threshold, etc. For the notification, higher layer signaling may be used. If the PHR trigger conditions are met, the UE triggers the PHR.

[0021] 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, and the like, or a combination of these.

[0022] 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.

[0023] (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 prescribes several limiting methods as provisions for limiting exposure.

[0024] As one limitation method, a limitation 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 It is set so that (measured maximum output power, measured set maximum UE output power) satisfies the following formula: 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 )

[0025] EIRP max is the maximum value of the corresponding measured peak equivalent isotopically radiated power (EIRP). f,c is a value indicating the reduction in maximum output power allowed for carrier f of serving cell c.

[0026] In NR, for UEs equipped with multiple panels, consideration is being given to prompting UL transmission beam selection based on UL beam instructions while taking into account UL coverage loss caused by MPE in order to quickly select a UL panel.

[0027] In the Rel.15 NR specification, the PHR may be triggered if the path loss of at least one activated serving cell of any MAC entity used as a path loss reference varies beyond a certain threshold since the last transmission of the PHR. However, the path loss reference may vary due to beam / panel fluctuations in the UE (e.g., due to MPE), path loss reference signal updates (e.g., updates based on MAC CE, use of default path loss reference signals), etc. In these cases, it is assumed that the PHR does not necessarily need to be triggered, but this is not taken into consideration in the current specification. If the appropriate PHR is not transmitted, communication throughput, communication quality, etc. may be degraded.

[0028] Therefore, the inventors have conceived a method to properly implement panel specific PHR triggering / transmission.

[0029] Hereinafter, embodiments of 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.

[0030] In addition, in the present disclosure, the terms activate, deactivate, instruct, select, set, update, determine, etc. may be read as interchangeable terms. In addition, in the present disclosure, the terms sequence, list, set, group, etc. may be read as interchangeable terms.

[0031] In addition, in the present disclosure, panel, beam, panel group, beam group, Uplink (UL) transmitting entity, TRP, spatial relationship information (SRI), spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, specific antenna port (e.g., DeModulation Reference Signal (DMRS) port), specific antenna port group (e.g., DMRS port group), specific group (e.g., Code Division Multiplexing (CDM) group, specific reference signal group, CORESET group), specific resource (e.g., specific reference signal resource), specific resource set (e.g., specific reference signal resource set), CORESET pool, etc. may be read as interchangeable.

[0032] In addition, a panel identifier (ID) and a panel may be interchangeable. That is, a TRP ID and a TRP, a CORESET group ID and a CORESET group, etc. may be interchangeable. An ID and an index may be interchangeable.

[0033] (Wireless communication method) In the present disclosure, an embodiment will be described below in which a UE determines a relationship between an SRS and a panel and reports the relationship to a base station. This report may be called a panel report or the like. Note that a panel report may be sent when a base station sets / instructs a relationship between an SRS and a panel.

[0034] <First embodiment> The first embodiment relates to a panel specific PHR.

[0035] In addition, when a panel-specific PHR is used, the PHR for the panel being reported CMAX , PH, P-MPR, etc. may be commonly applied for this panel. When beam / panel group specific PHR is used, the same PHR is shared within a group. That is, PHR for all beams / panels in the group being reported CMAX , PH, P-MPR, etc. may be commonly applied to this group. With this configuration, signaling overhead can be suitably suppressed.

[0036] [Embodiment 1.1] In embodiment 1.1, a triggering event (which may also be called a trigger event) of a panel-specific PHR is described.

[0037] A panel-specific PHR may be triggered, for example, when at least one of the following triggering events (1) to (5) occurs: (1) for at least one activated serving cell of any MAC entity used as a path loss reference for UL transmissions via (using) a panel, the path loss has changed by more than a certain threshold since the last transmission of the panel-specific PHR for that panel; (2) The P-MPR of a panel has changed by more than a certain threshold since the last transmission of the panel-specific PHR for that panel; (3) The P-MPR of a panel is higher than a certain threshold. (4) a prohibition timer (e.g., a timer set by the higher layer parameter phr-ProhibitTimer) expires or has expired, (5) A periodic timer (eg, a timer set by the higher layer parameter phr-PeriodicTimer) expires.

[0038] Regarding (1) above, the variation in path loss may refer to the variation (difference) between the path loss measured for a UL transmission through a panel at a certain time (e.g., the current time) and the path loss measured for a UL transmission through the panel at the time when a panel-specific PHR for that panel was last transmitted.

[0039] Regarding (1) above, the variation in path loss may correspond to the variation (difference) between the path loss measured for UL transmission via a certain beam / panel of a panel group / beam group at a certain time (e.g., the current time) and the path loss measured for UL transmission via any beam / panel of the panel group / beam group (which may be the same as or different from the certain beam / panel) at the time when a panel group / beam group-specific PHR for that panel group / beam group was last transmitted.

[0040] In relation to the above (2), in the present disclosure, P-MPR refers to a power backoff required due to power management, an allowed maximum output power reduction, a P-MPR c (P-MPR for serving cell c), etc.

[0041] The thresholds for (1) and (2) above may be provided by higher layer parameters (eg, phr-Tx-PowerFactorChange) (in dB).

[0042] The threshold value for (3) above may be provided by a higher layer parameter related to the threshold values ​​for (1) and (2) above, or may be provided by a different higher layer parameter.

[0043] The above item (4) will be described later in the second embodiment. The above item (5) will be described later in the second embodiment.

[0044] The conditions for generating a trigger event are not limited to the above (1)-(5), and other conditions may be present.

[0045] [Embodiment 1.2] In embodiment 1.2, a panel-specific PHR MAC CE that is transmitted when a panel-specific PHR is triggered will be described.

[0046] The panel-specific PHR MAC CE may include a panel ID.

[0047] 2A-2D are diagrams showing an example of the configuration of a panel-specific PHR MAC CE. The examples are all examples of single-entry PHR MAC CE for PCell, but are not limited to this. PCell may be replaced with another cell (e.g., SCell). Also, multiple-entry PHR MAC CE including a plurality of this configuration may be used (in this case, Type 1 PH may be replaced with another type of PH).

[0048] As shown in Fig. 2A, the panel-specific PHR MAC CE may be a MAC CE in which one panel ID field (6 bits in Fig. 2A) indicating a panel ID is added to the single-entry PHR MAC CE in Fig. 1. If the panel ID field is 4 bits or less, as shown in Fig. 2B, the R field of the single-entry PHR MAC CE in Fig. 1 may be replaced as a panel ID field (2 bits in Fig. 2B).

[0049] The PH field in Fig. 2A and 2B, P CMAX、f、cThe field may correspond to a value for the panel whose Panel ID the Panel ID field indicates.

[0050] The panel-specific PHR MAC CE may include multiple Panel ID fields, as shown in Figures 2C and 2D. Figure 2C is a MAC CE that includes two of the configurations in Figure 2A, and Figure 2D is a MAC CE that includes two of the configurations in Figure 2B.

[0051] In Figures 2C and 2D, "#1" indicates that the field is related to the first panel indicated by panel ID #1, and "#2" indicates that the field is related to the second panel indicated by panel ID #2.

[0052] Note that the panel ID field may uniquely indicate a panel regardless of whether it is active or not (it may be configured to represent (identify) all panels of the UE), or it may indicate only active panels. Thus, the "panel" in this disclosure may be read as an activated panel, an active panel, etc., interchangeably.

[0053] 3A and 3B are diagrams showing another example of the configuration of a panel-specific PHR MAC CE. Both of these examples are also examples of single-entry PHR MAC CE for PCell, but are not limited to this. PCell may be replaced with another cell (e.g., SCell). Also, multiple-entry PHR MAC CE including a plurality of this configuration may be used (in this case, Type 1 PH may be replaced with another type of PH).

[0054] 3A shows an example of a panel-specific PHR MAC CE that does not include a panel ID field. The "#i" (i=1-4) in each field may indicate that the field is related to the i-th panel, or may indicate that the field is related to the panel indicated by the panel ID #i.

[0055] The MAC CE as in FIG. 3A may be utilized by a UE that satisfies at least one of the following: - Reported information about the number of panels it has (supports) using UE capability information, The number of panels to be included in the PHR MAC CE and notified is set by the network (base station) to the UE using higher layer signaling, physical layer signaling, etc. The UE notifies the network (base station) of the number of panels to be included in the PHR MAC CE using higher layer signaling, physical layer signaling, etc.

[0056] FIG. 3A may correspond to the case where the number of these panels is four.

[0057] In addition, when a UE reports information on all panels, the MAC CE as shown in FIG. 3A may correspond to a MAC CE in which all panel ID fields are omitted from the MAC CE in FIG. 2C.

[0058] FIG. 3B shows an example of a panel-specific PHR MAC CE including a panel ID field corresponding to each panel ID. The AX (X=0-3) field contains information about panel #X+1 (e.g., the PH field, P CMAX、f、c This indicates whether the A0 field is included in (reported by) this MAC CE. For example, a PHR MAC CE with an A0 field = '0' does not include information about panel #1, and a PHR MAC CE with an A0 field = '1' includes information about panel #1.

[0059] FIG. 3B shows an example where the A0 field=A1 field='1' and the A2 field=A3 field='0'.

[0060] The order of the fields included in each MAC CE is not limited to the order shown in these examples. For example, in the same 6 octets as in FIG. 2C, CMAX、f、c #1, PH#2, P CMAX、f、cAlternatively, a MAC CE containing panel ID #2, panel ID #1, and panel ID #2 in that order may be used.

[0061] Furthermore, the number of panels that the UE has is not limited to four and may be any value. In this case, the number of each field (for example, the number of AX fields in FIG. 3B) may be increased or decreased from the example already shown.

[0062] The panel-specific PHR MAC CE may or may not include a P-MPR field indicating the P-MPR for the panel of the panel ID implicitly or explicitly indicated by the MAC CE. The panel-specific PHR MAC CE may include the P-MPR field when the PHR is triggered by a specific trigger event (e.g., (2) or (3)) among the above-mentioned trigger events, and may not include the P-MPR field in other cases.

[0063] In addition, when the panel-specific PHR is triggered based on the above-mentioned trigger event, the panel-specific PHR MAC CE stores information (e.g., PH field, P CMAX、f、c The panel-specific PHR MAC CE may include only information for a panel corresponding to the trigger event that occurred (such as a P-MPR field, a P-MPR field, etc.). The panel-specific PHR MAC CE may include information for panels that are not related to the trigger event that occurred, as well as information for a panel that corresponds to the trigger event that occurred. For example, the panel-specific PHR MAC CE may include information for all panels.

[0064] In addition, when the above-mentioned trigger event occurs for multiple panels, information for multiple panels corresponding to the trigger event that occurred (e.g., PH field, P CMAX、f、c field, P-MPR field, etc.

[0065] According to the first embodiment described above, the UE can suitably trigger a panel-specific PHR MAC CE transmission for an appropriate panel based on a trigger event.

[0066] <Second embodiment> The second embodiment relates to a prohibit timer (eg, phr-ProhibitTimer).

[0067] For panel-specific PHRs, the prohibit timer MAY satisfy at least one of the following: Embodiment 2.1: One inhibit timer is maintained (or utilized) for all panels; Embodiment 2.2: One inhibit timer is maintained (or utilized) for one panel; · Embodiment 2.3: One inhibit timer is maintained (or utilized) for one panel group.

[0068] For embodiment 2.1, the UE may assume that any panel-specific PHR will not be triggered while the prohibit timer is running.

[0069] In the case of embodiment 2.1, a panel-specific PHR for a panel may be triggered when the trigger event (4) in embodiment 1.1 and at least one of the trigger events (1)-(3) for the panel occur. When a panel-specific PHR (panel-specific PHR MAC CE) for any panel is transmitted, the prohibition timer may be restarted. According to embodiment 2.1, there is no need to manage multiple prohibition timers, which reduces the complexity of the UE.

[0070] In addition, in the present disclosure, "the timer starts (or restarts)" may be read as "the MAC entity of the UE starts (or restarts) the timer".

[0071] In embodiment 2.2, the UE may assume that a panel-specific PHR for a panel will not be triggered while the prohibit timer for that panel is running.

[0072] In the case of embodiment 2.2, an independent prohibition timer is used for each panel. A panel-specific PHR for a panel may be triggered when the trigger event (4) for the panel in embodiment 1.1 and at least one of the trigger events (1)-(3) for the panel occur. When a panel-specific PHR (panel-specific PHR MAC CE) for a panel is transmitted, the prohibition timer for the panel may be restarted. According to embodiment 2.2, it is possible to reduce cases in which a PHR transmission for a panel inhibits a PHR transmission for another panel.

[0073] In embodiment 2.3, the UE may assume that a panel-specific PHR for a panel group (or any panel belonging to that panel group) will not be triggered while the prohibition timer for that panel group is running.

[0074] In the case of embodiment 2.3, an independent prohibition timer is utilized for each panel group. A panel-specific PHR for a panel of a panel group may be triggered when the trigger event (4) of embodiment 1.1 for the panel group and at least one of the trigger events (1)-(3) for the panel occur. When a panel-specific PHR (panel-specific PHR MAC CE) for any panel of a panel group is transmitted, the prohibition timer for the panel group may be restarted. According to embodiment 2.3, although the prohibition timer is shared by the panel group, the PHR may be triggered / transmitted independently for each panel in the panel group.

[0075] 4A-4C are diagrams illustrating an example of the control of the prohibition timer of the second embodiment. FIG. 4A-4C illustrate cases in which the UE uses the prohibition timer of the embodiments 2.1-2.3, respectively. In FIG. 4C, it is assumed that the panel group #a includes the panels #1 and #2.

[0076] In Figure 4A, when the PHR for panel #1 is sent, the inhibit timer starts again. No PHRs for any panel will be triggered / sent until this inhibit timer expires.

[0077] In Fig. 4B, when the PHR for panel #1 is sent, the prohibit timer for panel #1 starts again. Until this prohibit timer expires, the PHR for panel #1 will not be triggered. Meanwhile, the PHR for panel #2 may be triggered / sent even if the prohibit timer for panel #1 is running.

[0078] In Fig. 4C, when the PHR for panel #1 is sent, the prohibit timer for panel group #a to which panel #1 belongs starts again. Until this prohibit timer expires, the PHR for panels #1 and #2 in panel group #a is not triggered. In this example, the PHR for panel #2 is triggered / sent after this prohibit timer expires.

[0079] According to the second embodiment described above, the UE can suitably trigger the transmission of a panel-specific PHR based on the prohibition timer.

[0080] <Third embodiment> The third embodiment relates to a periodic timer (eg, phr-PeriodicTimer).

[0081] For a panel-specific PHR, the periodic timer MAY satisfy at least one of the following: Embodiment 3.1: One periodic timer is maintained (or utilized) for all panels; Embodiment 3.2: One periodic timer is maintained (or utilized) for one panel; · Embodiment 3.3: One periodic timer is maintained (or utilized) for one panel group.

[0082] For embodiment 3.1, the UE may trigger panel-specific PHR for all panels when the periodic timer expires.

[0083] In the case of embodiment 3.1, a panel-specific PHR for a certain panel may be triggered when the trigger event (5) in embodiment 1.1 occurs. In embodiment 3.1, the PHR triggered by the trigger event (5) above (this PHR may be called a periodic PHR) may be a PHR for all panels. The periodic timer may be restarted when a panel-specific PHR (panel-specific PHR MAC CE) for any panel is transmitted. The periodic timer may be restarted only when a periodic PHR is transmitted. According to embodiment 3.1, there is no need to manage multiple periodic timers, so the complexity of the UE can be reduced.

[0084] In embodiment 3.2, the UE may trigger a panel-specific PHR for a panel when a periodic timer for the panel expires.

[0085] In the case of embodiment 3.2, an independent periodic timer is used for each panel. A panel-specific PHR for a panel may be triggered when the trigger event of (5) in embodiment 1.1 for that panel occurs. When a panel-specific PHR (panel-specific PHR MAC CE) for a panel is transmitted, the periodic timer for that panel may be restarted. According to embodiment 3.2, the PHR for each panel can be transmitted suitably periodically.

[0086] In embodiment 3.3, the UE may trigger a panel-specific PHR for a panel group (or any panel belonging to the panel group) when a periodic timer for the panel group expires.

[0087] In the case of embodiment 3.3, an independent periodic timer is used for each panel group. A panel-specific PHR for a panel of a panel group may be triggered when a trigger event of (5) in embodiment 1.1 for the panel group occurs. When a panel-specific PHR (panel-specific PHR MAC CE) for any panel of a panel group is transmitted, the periodic timer for the panel group may be restarted. According to embodiment 3.3, the periodic timer is shared by the panel group, and the panel-specific PHR can be transmitted after the periodic timer has elapsed since the last panel-specific PHR transmission in the panel group. In other words, excessive transmission of panel-specific PHRs based on the periodic timer can be suppressed.

[0088] In addition, for the embodiments 3.2 and 3.3 as well, as described in the embodiment 3.1, a configuration may be adopted in which the periodic timer is restarted only when a periodic PHR is transmitted.

[0089] 5A and 5B are diagrams showing an example of control related to a periodic timer in the third embodiment. FIG. 5A and 5B show a case where a UE uses a periodic timer in the embodiment 3.1, respectively. In this example, it is assumed that the UE has four panels (panels #1-#4). PHRs related to these four panels are transmitted by the periodic PHR. In the following drawings, the mere description of "PHR" may mean any PHR (which may be a periodic PHR or any other PHR).

[0090] Figure 5A shows the case where the periodic timer is restarted by any panel-specific PHR transmission. In Figure 5A, when the PHR for panel #1 is transmitted, the periodic timer is restarted. In this example, before this periodic timer expires, the PHR for panel #2 is transmitted and the periodic timer is restarted. When the periodic timer expires, periodic PHRs for all panels are triggered / transmitted.

[0091] In Fig. 5B, the periodic timer is restarted only by the periodic PHR transmission. In Fig. 5B, even if a panel-specific PHR other than the periodic PHR (in this example, the PHR for panel #2 was triggered by another trigger event) is transmitted before the periodic timer expires, the periodic timer is not restarted and continues to operate.

[0092] 6A and 6B are diagrams illustrating another example of control regarding the periodic timer of the third embodiment. FIGs. 6A and 6B illustrate a case in which the UE uses the periodic timer of the embodiments 3.2 and 3.3, respectively. In FIG. 6B, it is assumed that the panel group #a includes panels #1 and #2.

[0093] In Fig. 6A, when a PHR for panel #1 is transmitted, a periodic timer for panel #1 is started again, and when the periodic timer expires, a periodic PHR for panel #1 is triggered / transmitted. When a PHR for panel #2 is transmitted, a periodic timer for panel #2 is started again, and when the periodic timer expires, a periodic PHR for panel #2 is triggered / transmitted. The periodic timer for panel #1 and the periodic timer for panel #2 operate independently.

[0094] In Fig. 6B, when the PHR for panel #1 is transmitted, the periodic timer for panel group #a to which panel #1 belongs is restarted. In this example, before this periodic timer expires, the PHR for panel #2 is transmitted and the periodic timer for panel group #a to which panel #2 belongs is restarted. When the periodic timer expires, periodic PHRs for panels #1 and #2 included in panel group #a are triggered / transmitted.

[0095] According to the third embodiment described above, the UE can suitably trigger the transmission of a panel-specific PHR based on a periodic timer.

[0096] <Other> In each of the above-described embodiments, in consideration of reducing signaling overhead, reducing UE complexity, etc., at least one of the same reporting amount, the same parameters, and the same timer may be used for one or more panels or one or more panel groups.

[0097] For example, in the first embodiment, a panel group (or multiple panels) may share the same PHR. In other words, the PHR reported for a panel group CMAX , PH, P-MPR, etc. may be applied to all panels in the panel group.

[0098] In the second or third embodiment, a panel group (or multiple panels) may share the same inhibit timer / same periodic timer.

[0099] A panel group (or multiple panels) has the same PHR (or P CMAX Whether to share a UE with a P-MPR or a PH or a prohibition timer or a periodic timer may be configured in the UE by higher layer (e.g., RRC) signaling, may be predetermined by a specification, or may be determined by the UE capabilities.

[0100] The above-mentioned embodiments may be applied when the UE reports specific capability information, or when the UE is configured with specific information related to the above-mentioned embodiments by higher layer signaling. When the UE does not report the specific capability information or the specific information is not configured, the UE may use the PHR transmission method of Rel.15 / 16.

[0101] For example, the specific capability information may be information indicating that the UE supports at least one of a panel-specific PHR, an inhibit timer for the PHR for the panel, and a periodic timer for the PHR for the panel.

[0102] For example, the specific information may be information indicating enabling at least one of a panel-specific PHR, a prohibit timer for the PHR for the panel, and a periodic timer for the PHR for the panel.

[0103] (Wireless communication system) 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.

[0104] 7 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).

[0105] 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.

[0106] 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.

[0107] 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))).

[0108] 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.

[0109] 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).

[0110] 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.

[0111] 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).

[0112] 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.

[0113] 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.

[0114] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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).

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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).

[0129] (base station) 8 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 one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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 .

[0141] 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 .

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] The transmitting / receiving unit 120 may transmit information about a trigger event related to a certain panel to the user terminal 20. The information may be at least one of information such as phr-ProhibitTimer, phr-PeriodicTimer, phr-Tx-PowerFactorChange, and a threshold related to P-MPR ((3) in the first embodiment). The information may be set together with the related panel (for example, a panel ID), or may be included in the setting information of the PHR.

[0147] The transceiver 120 may also receive a Medium Access Control (MAC) control element (panel-specific PHR MAC CE) for a Power Headroom Report (PHR) related to the panel, triggered based on the information.

[0148] The trigger event may include the expiration of a periodic timer associated with the panel.

[0149] (User terminal) 9 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 transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] When a trigger event related to a certain panel occurs, the control unit 210 may trigger a Power Headroom Report (PHR) related to the panel.

[0167] The transceiver 220 may transmit a Medium Access Control (MAC) control element for the PHR that is triggered.

[0168] The trigger event may include an event that the path loss for at least one activated serving cell of any MAC entity used as a path loss reference for uplink transmissions via the panel has changed by more than a certain threshold since the last transmission of a panel-specific PHR associated with the panel.

[0169] The trigger event may include an event in which the Power Management Maximum Power Reduction (P-MPR) of the panel has fluctuated beyond a certain threshold since the last transmission of a panel-specific PHR associated with the panel.

[0170] The trigger event may include an event in which an inhibit timer associated with the panel expires or has expired.

[0171] The trigger event may include the expiration of a periodic timer associated with the panel.

[0172] The control unit 210 may trigger the PHR for all panels when the periodic timer expires.

[0173] When the MAC CE triggered based on the periodic timer is transmitted, the control unit 210 may restart the periodic timer, and when the MAC CE triggered based on another trigger event is transmitted, the control unit 210 may not restart the periodic timer.

[0174] (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.

[0175] 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.

[0176] 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. 10 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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).

[0186] 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.

[0187] 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.

[0188] (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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel / signal outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] 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.

[0214] 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).

[0215] 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).

[0216] 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).

[0217] 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.

[0218] 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.

[0219] 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).

[0220] 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.

[0221] 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.

[0222] 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.

[0223] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0224] 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.

[0225] 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.

[0226] 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, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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).

[0231] 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."

[0232] 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0237] 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."

[0238] 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.

[0239] 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."

[0240] 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.

[0241] 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.

[0242] 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 transmitting unit that reports information regarding the number of panels using capability information; A receiving unit that receives higher layer signaling regarding the number of panels to be notified by including the signaling in a Medium Access Control Element (MAC CE); A control unit that triggers a power headroom report (PHR) related to the multiple panels when a power management maximum power reduction (P-MPR) of at least one of the multiple panels of the number of panels notified by the higher layer signaling is higher than a threshold value, The transmitting unit transmits the MAC CE related to the PHR to be triggered, the MAC CE including information on a PHR for each panel in the multiple panels of the number of panels notified by the higher layer signaling, and information on a maximum output power for each panel in the multiple panels.

2. Reporting information regarding the number of panels using capability information; receiving higher layer signaling regarding the number of panels to be signaled in a Medium Access Control Element (MAC CE); Triggering a power headroom report (PHR) related to the multiple panels when a power management maximum power reduction (P-MPR) of at least one of the multiple panels of the number of panels notified in the higher layer signaling is higher than a threshold value; transmitting the MAC CE related to the PHR to be triggered, the MAC CE including information on a PHR for each panel in the multiple panels of the number of panels notified by the higher layer signaling, and information on a maximum output power for each panel in the multiple panels.

3. A system having a terminal and a base station, The terminal includes: a transmitting unit that reports information regarding the number of panels using capability information; A receiving unit that receives higher layer signaling regarding the number of panels to be notified by including the signaling in a Medium Access Control Element (MAC CE); A control unit that triggers a power headroom report (PHR) related to the multiple panels when a power management maximum power reduction (P-MPR) of at least one of the multiple panels of the number of panels notified by the higher layer signaling is higher than a threshold value, The transmission unit transmits the MAC CE related to the PHR to be triggered, the MAC CE including information on a PHR for each panel in the multiple panels of the number of panels notified by the higher layer signaling and information on a maximum output power for each panel in the multiple panels; The base station, A receiving unit that receives a report using the capability information; A transmitter that transmits the higher layer signaling, The receiving unit further receives the MAC CE.

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