Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit configured to trigger a power headroom report (PHR) associated with a panel upon occurrence of a triggering event associated with the panel; and a sending unit configured to send a medium access control (MAC) control element associated with the triggered PHR. According to one embodiment of the present disclosure, a PHR associated with a panel can be appropriately triggered / sent.

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 Art

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized to achieve even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been standardized to further enhance the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Releases (Rel.) 8 and 9).

[0003] Successor systems to LTE (e.g., also known as the fifth generation mobile communication system (5G), 5G+ (plus), the sixth generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] 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

[0007] Problems to be solved by the invention

[0008] In NR, a user terminal (User Equipment (UE)) sends a Power Headroom (PH) report (Power Headroom Report (PHR)) to the network, which contains information about the power headroom (PH) of each serving cell. The network can use the PHR to control the UE's uplink transmit power.

[0009] Furthermore, in NR, studies are underway to address the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure).

[0010] In addition, in NR, research is underway to facilitate UL transmission beam selection based on UL beam indication in order to enable high-speed selection of UL panels for UEs equipped with multiple panels, taking into account UL coverage loss caused by MPE.

[0011] However, because current specifications fail to adequately consider the panel, it is assumed that PHR is triggered when it is not necessarily necessary. If the PHR is not properly transmitted, there is a risk of degradation in communication throughput, communication quality, etc.

[0012] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately trigger / transmit a PHR associated with a panel.

[0013] Means for solving problems

[0014] A terminal involved in one embodiment of the present invention comprises: a control unit, which triggers a power headroom report (PHR) associated with a panel when a triggering event related to the panel occurs; and a sending unit, which sends a medium access control (MAC) control element related to the triggered PHR.

[0015] Effects of the Invention

[0016] According to one aspect of the present disclosure, a PHR associated with a panel can be appropriately triggered / sent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a diagram showing an example of PHR MAC CE in Rel.15NR.

[0018] Figures 2A to 2DThis is a diagram showing an example of the structure of the panel-specific PHR MAC CE.

[0019] Figure 3A as well as Figure 3B This is a diagram showing another example of the structure of the panel-specific PHR MAC CE.

[0020] Figures 4A to 4C This is a diagram showing an example of control related to the prohibition timer according to the second embodiment.

[0021] Figure 5A as well as Figure 5B This is a diagram showing an example of control related to the periodic timer according to the third embodiment.

[0022] Figure 6A as well as Figure 6B This is a diagram showing another example of control related to the periodic timer according to the third embodiment.

[0023] Figure 7 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0024] Figure 8 This is a diagram showing an example of the configuration of a base station according to one embodiment.

[0025] Figure 9 This is a diagram showing an example of the configuration of a user terminal according to an embodiment.

[0026] Figure 10 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment. DETAILED DESCRIPTION

[0027] (PHR)

[0028] In NR, the UE sends a Power Headroom (PH) report (Power Headroom Report (PHR)) containing information about 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.

[0029] The PHR may also be sent using the PUSCH (Physical Uplink Shared Channel) and MAC (Medium Access Control) signaling. For example, the PHR is notified using the PHR MAC CE (Control Element) included in the MAC PDU (Protocol Data Unit).

[0030] Figure 1 This is a diagram showing an example of PHR MAC CE in Rel.15NR. Figure 1 This is a single entry PHR MAC CE. This MAC CE consists of 2 octets (=16 bits). Figure 1 'R' respectively represents a 1-bit reserved field, for example, is set to a value of '0'.

[0031] Figure 1 'PH (Type 1, PCell)' is a 6-bit field indicating an index associated with a Type 1 PH of a PCell (Primary Cell). The index associated with the PH is associated with a specific PH value (or level (dB)).

[0032] In addition, for example, type 1 PH may be a PH that takes PUSCH into consideration (for example, only the power of PUSCH is considered), type 2 PH may be a PH that takes PUCCH into consideration (for example, the power of both PUSCH and PUCCH is considered), and type 3 PH may be a PH that takes into consideration a measurement reference signal (SRS: Sounding Reference Signal) (for example, the power of PUSCH and SRS is considered).

[0033] Figure 1 'P CMAX,f,c 'Indicates a 6-bit field, indicating the P used in the calculation of the above PH field CMAX,f,c Related index. CMAX,f,c The relevant index is associated with the specific UE transmit power level (dB). CMAX,f,c It can also be called the maximum transmission power (maximum allowed transmission power) set for the UE of the serving cell c for carrier f. CMAX,f,c Abbreviated as P CMAX .

[0034] In addition, NR also supports multiple entry PHR MAC CEs (multiple entry PHR MAC CEs) containing multiple data similar to the single entry (2 octets) mentioned above. The multiple entry PHR MAC CE can also include the PH field for the PSCell (Primary Secondary Cell) or SCell, etc.

[0035] The network may also send PHR configuration information related to the conditions for triggering a PHR to the UE. Examples of PHR configuration information include a prohibit timer, a periodic timer, and a path loss change threshold. This notification may also utilize higher-layer signaling. When the PHR triggering conditions are met, the UE triggers a PHR.

[0036] 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, or a combination thereof.

[0037] MAC signaling may also use, for example, MAC Control Element (MAC CE) and MAC Protocol Data Unit (MAC PDU). Broadcast information may also include, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), and Other System Information (OSI).

[0038] (MPE)

[0039] In NR, research is underway to address the issue of Maximum Permitted Exposure (MPE) (or electromagnetic power density exposure). For health and safety reasons, UEs are required to meet Federal Communications Commission (FCC) limits on maximum human exposure. For example, Rel. 15 NR specifies several methods for limiting exposure.

[0040] As a limitation method, the use of Power Management Maximum Power Reduction (P-MPR) is specified. For example, the UE maximum output power P CMAX,f,c is set to, the corresponding P UMAX,f,c (Measured maximum output power, measured set maximum UE output power) satisfies the following formula.

[0041] 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 )

[0042] EIRP max It is the maximum value of the corresponding measured peak equivalent isotropically radiated power (EIRP: Equivalent Isotopically Radiated Power). f,c is a value indicating a reduction in the maximum output power permitted for carrier f of serving cell c.

[0043] In NR, research is underway to facilitate UL transmit beam selection based on UL beam indication, taking into account UL coverage loss due to MPE, in order to enable high-speed selection of UL panels for UEs equipped with multiple panels.

[0044] However, in the Rel.15NR specification, after the last transmission of the PHR, if the path loss of at least one activated serving cell of any MAC entity used as a path loss reference changes by exceeding a certain threshold, the PHR may be triggered. However, the path loss reference may change due to changes in the beam / panel in the UE (for example, due to MPE), updates to the path loss reference signal (for example, based on updates to the MAC CE, use of the default path loss reference signal), etc. In these cases, it is assumed that the PHR does not necessarily need to be triggered, but this is not taken into account in the current specification. If the appropriate PHR is not sent, there is a concern that communication throughput, communication quality, etc. will deteriorate.

[0045] Therefore, the inventors of the present invention have devised a method for properly implementing panel specific PHR triggering / transmission.

[0046] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the various embodiments may be applied individually or in combination.

[0047] In addition, in the present disclosure, activation, deactivation, indication, selection, setting, update, determination, etc. can also be replaced with each other. In addition, in the present disclosure, sequence, list, set (set), group, etc. can also be replaced with each other.

[0048] 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 (for example, demodulation reference signal (DeModulation Reference Signal (DMRS)) port), specific antenna port group (for example, DMRS port group), specific group (for example, code division multiplexing (Code Division Multiplexing (CDM)) group, specific reference signal group, CORESET group), specific resources (for example, specific reference signal resources), specific resource set (for example, specific reference signal resource set), CORESET pool, etc. can also be replaced with each other.

[0049] Furthermore, the panel identifier (Identifier (ID)) and the panel can be interchanged. That is, the TRP ID and the TRP can be interchanged, and the CORESET group ID and the CORESET group can be interchanged. The ID and index can also be interchanged.

[0050] (Wireless Communication Method)

[0051] In this disclosure, the following describes an embodiment in which a UE determines the relationship between an SRS and a panel and reports this relationship to a base station. This report may also be referred to as a panel report. Furthermore, a panel report may also be sent when the base station sets / indicates the relationship between the SRS and the panel.

[0052] <First embodiment>

[0053] The first embodiment relates to a panel specific PHR.

[0054] In addition, when panel-specific PHR is used, the PHR associated with the panel being reported CMAX , PH, P-MPR, etc. can also be commonly applied to the panel. In case beam group / panel group specific PHR is used, the same PHR is shared within a group. That is, PHR related to all beams / panels in the group being reported CMAX , PH, P-MPR, etc. can also be commonly applied to the group. According to this structure, signaling overhead can be appropriately suppressed.

[0055] [Implementation 1.1]

[0056] In embodiment 1.1, a triggering event of a panel-specific PHR (also referred to as a triggering event) is described.

[0057] The panel-specific PHR may also be triggered, for example, when at least one of the following triggering events (1) to (5) occurs:

[0058] (1) after the last transmission of a panel-specific PHR for a panel, the path loss for at least one activated serving cell of any MAC entity used as a path loss reference for UL transmissions via (using) that panel varies by more than a certain threshold,

[0059] (2) After the last transmission of the panel-specific PHR for a certain panel, the P-MPR of the panel changes by exceeding a certain threshold,

[0060] (3) The P-MPR of a panel is higher than a certain threshold,

[0061] (4) a prohibit timer (e.g., a timer set by the higher-layer parameter phr-ProhibitTimer) expires or has expired,

[0062] (5) A periodic timer (eg, a timer set via the higher-layer parameter phr-PeriodicTimer) expires.

[0063] For the above (1), the change in path loss can also be equivalent to the change (difference) in the path loss measured for UL transmission via the panel at a certain time (for example, the current time) and the path loss measured for UL transmission via the panel at the time when the panel-specific PHR for the panel was last sent.

[0064] For the above (1), the change in path loss can also be equivalent to the change (difference) in the path loss measured for UL transmission via a certain beam / panel of the panel group / beam group at a certain time (for example, the current time), and the path loss measured for UL transmission via an arbitrary beam / panel of the panel group / beam group (which may be the same as or different from the above-mentioned beam / panel) at the time when the panel group / beam group-specific PHR for the panel group / beam group was last sent.

[0065] In connection with (2) above, in the present disclosure, P-MPR can also be combined with required power backoff due to power management, allowed maximum output power reduction, P-MPR c (P-MPR for serving cell c) etc. are interchangeable.

[0066] The thresholds for (1) and (2) above may also be provided by a higher-layer parameter (eg, phr-Tx-PowerFactorChange) (in dB).

[0067] The threshold value for (3) above may be provided by a high-level parameter related to the threshold values for (1) and (2) above, or by another high-level parameter.

[0068] The above (4) will be described later in the second embodiment. The above (5) will be described later in the second embodiment.

[0069] In addition, the conditions for triggering an event are not limited to the above (1)-(5), and can also be other conditions.

[0070] [Implementation Method 1.2]

[0071] In embodiment 1.2, the panel-specific PHR MAC CE transmitted when the panel-specific PHR is triggered is described.

[0072] The panel ID may also be included in the panel specific PHR MAC CE.

[0073] Figures 2A to 2D This figure shows an example of the structure of a panel-specific PHR MAC CE. This example is an example of a single-entry PHR MAC CE for the PCell, but the present invention is not limited to this. The PCell may be replaced by another cell (e.g., an SCell). Furthermore, a multi-entry PHR MAC CE containing multiple such structures may also be used (in this case, the Type 1 PH may be replaced by another type of PH).

[0074] like Figure 2A As shown, the panel-specific PHR MAC CE can also be in Figure 1 A panel ID field is added to the single entry PHR MAC CE to indicate the panel ID (in Figure 2A In the case where the panel ID field is 4 bits or less, such as Figure 2B As shown, you can also Figure 1 The R field of the single-entry PHR MAC CE is replaced with the Panel ID field (in Figure 2B 2 bits in ).

[0075] Figure 2A as well as Figure 2B PH field, P CMAX、f、c The field may also correspond to a value for the panel for the panel ID indicated by the Panel ID field.

[0076] like Figure 2C 、 Figure 2D As shown, multiple panel ID fields may also be included in the panel-specific PHR MAC CE. Figure 2C It contains two Figure 2A The structure of MAC CE, Figure 2D It contains two Figure 2B MAC CE with the structure of .

[0077] exist Figure 2C 、 Figure 2D In the field, "#1" indicates a field related to the first panel indicated by panel ID#1, and "#2" indicates a field related to the second panel indicated by panel ID#2.

[0078] Furthermore, the panel ID field can uniquely represent a panel regardless of whether it is activated (or can be configured to represent (identify) all panels of the UE), or it can only represent the activated panel. Thus, the term "panel" in this disclosure can be interchanged with activated panel, activated panel, etc.

[0079] Figure 3A as well as Figure 3B This figure shows another example of the structure of a panel-specific PHR MAC CE. This example also uses a single-entry PHR MAC CE for the PCell, but is not limited to this. The PCell may be replaced by another cell (e.g., an SCell). Furthermore, a multi-entry PHR MAC CE containing multiple instances of this structure may also be used (in this case, the Type 1 PH may be replaced by another type of PH).

[0080] Figure 3A An example of a panel-specific PHR MAC CE that does not include a panel ID field is shown. "#i" (i=1-4) in each field may indicate a field related to the i-th panel or a field related to the panel indicated by panel ID #i.

[0081] like Figure 3A Such a MAC CE can also be utilized by a UE that satisfies at least one of the following conditions:

[0082] Use UE capability information to report information related to the number of panels it has (supports),

[0083] The network (base station) uses higher layer signaling, physical layer signaling, etc. to set the number of panels to be included in the PHR MAC CE and notified to the UE.

[0084] 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, and the like.

[0085] Figure 3A It can also cope with the case where the number of these panels is 4.

[0086] In addition, in the case where the UE reports information related to the entire panel, such as Figure 3A Such MAC CE can also be equivalent to Figure 2C The MAC CE in which all panel ID fields are omitted.

[0087] Figure 3BAn example of a panel-specific PHR MAC CE including a panel ID field corresponding to each panel ID is shown. The AX (X=0-3) field indicates whether information for panel #X+1 (e.g., PH field, PHR field, etc.) is included in the MAC CE (whether it is reported via the MAC CE). CMAX、f、c For example, a PHR MAC CE with A0 field = '0' does not include information for panel #1, and a PHR MAC CE with A0 field = '1' includes information for panel #1.

[0088] Figure 3B An example is shown in which the A0 field=A1 field='1' and the A2 field=A3 field='0'.

[0089] In addition, the order of the fields included in each MAC CE is not limited to the order of these examples. Figure 2C In the same 6 octets, press PH#1, P CMAX、f、c #1, PH#2, P CMAX、f、c The MAC CE included in the order of #2, panel ID#1, and panel ID#2.

[0090] In addition, the number of panels that the UE has is not limited to 4, and can be any value. In this case, the number of each field (for example, Figure 3B The number of AX fields) can also be increased or decreased from the example shown.

[0091] The panel-specific PHR MAC CE may or may not include a P-MPR field, wherein the P-MPR field indicates the P-MPR of the panel for the panel ID implicitly or explicitly indicated by the MAC CE. The panel-specific PHR MAC CE may also 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.

[0092] In addition, when the panel-specific PHR is triggered based on the above-mentioned triggering event, the panel-specific PHR MAC CE may also include only information (e.g., PH field, P CMAX、f、c field, P-MPR field, etc.). The panel-specific PHR MAC CE may include not only information for the panel corresponding to the trigger event that occurred, but also information for panels not related to the trigger event that occurred. For example, the panel-specific PHR MAC CE may include information for all panels.

[0093] In addition, when the trigger event described above occurs for multiple panels, information for the multiple panels corresponding to the trigger event may also be included (for example, PH field, P CMAX、f、c field, P-MPR field, etc.).

[0094] According to the first embodiment described above, the UE can appropriately trigger the transmission of a panel-specific PHR MAC CE related to an appropriate panel based on a triggering event.

[0095] <Second embodiment>

[0096] A second embodiment relates to a prohibit timer (eg, phr-ProhibitTimer).

[0097] With respect to the panel-specific PHR, the inhibit timer may also satisfy at least one of the following:

[0098] Implementation 2.1: One inhibit timer is maintained (or utilized) for all panels,

[0099] Implementation 2.2: An inhibit timer is maintained (or utilized) for a panel,

[0100] • Implementation 2.3: An inhibit timer is maintained (or utilized) for a panel group.

[0101] In the case of embodiment 2.1, the UE may also assume that any panel-specific PHR is not triggered while the prohibit timer is running.

[0102] In the case of embodiment 2.1, the panel-specific PHR for a certain panel may also be triggered when the trigger event of (4) of embodiment 1.1 and at least one of the trigger events (1)-(3) for the panel occur. If the panel-specific PHR (panel-specific PHR MAC CE) for any panel is sent, the prohibit timer may also be restarted. According to embodiment 2.1, there is no need to manage multiple prohibit timers, thereby reducing the complexity of the UE.

[0103] In addition, in the present disclosure, "the timer starts (or restarts)" can also be replaced with "the MAC entity of the UE starts (or restarts) the timer".

[0104] In the case of embodiment 2.2, the UE may also assume that the panel-specific PHR for a certain panel is not triggered while the prohibition timer for the panel is running.

[0105] In the case of embodiment 2.2, an independent prohibit timer is used for each panel. The panel-specific PHR for a certain panel may also be triggered when the trigger event (4) of embodiment 1.1 for the panel and at least one of the trigger events (1) to (3) for the panel occur. If the panel-specific PHR (panel-specific PHR MAC CE) for a certain panel is sent, the prohibit timer for the panel may also be restarted. According to embodiment 2.2, the situation in which the PHR transmission for other panels is suppressed due to the transmission of the PHR for a certain panel can be reduced.

[0106] In the case of embodiment 2.3, the UE may also assume that the panel-specific PHR for a certain panel group (or any panel belonging to the panel group) is not triggered while the prohibition timer for the panel group is running.

[0107] In the case of embodiment 2.3, an independent inhibit timer is used for each panel group. The panel-specific PHR for a panel of a certain panel group can also 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. If the panel-specific PHR (panel-specific PHR MAC CE) for any panel of a certain panel group is sent, the inhibit timer for the panel group can also be restarted. According to embodiment 2.3, although the inhibit timer is shared in the panel group, the PHR can be triggered / sent independently for each panel in the panel group.

[0108] Figures 4A to 4C This is a diagram showing an example of control related to the prohibition timer according to the second embodiment. Figures 4A to 4C The following shows the situation where the UE uses the prohibition timer of implementation modes 2.1-2.3 respectively. Figure 4C , imagine that panel group #a includes panels #1 and #2.

[0109] exist Figure 4A If the PHR for panel #1 is sent, the prohibit timer starts again. Before the prohibit timer expires, the PHR for any panel is not triggered / sent.

[0110] exist Figure 4B If the PHR for panel #1 is sent, the inhibit timer for panel #1 is started again. Before the inhibit timer expires, the PHR for panel #1 is not triggered. On the other hand, the PHR for panel #2 can be triggered / sent even when the inhibit timer for panel #1 is not started.

[0111] exist Figure 4C In this example, if the PHR for panel #1 is sent, the inhibit timer for panel group #a, to which panel #1 belongs, is restarted. Before the inhibit timer expires, the PHR for panels #1 and #2 included in panel group #a is not triggered. In this example, after the inhibit timer expires, the PHR for panel #2 is triggered / sent.

[0112] According to the second embodiment described above, the UE can appropriately trigger the transmission of the panel-specific PHR based on the prohibit timer.

[0113] <Third embodiment>

[0114] The third embodiment relates to a periodic timer (eg, phr-PeriodicTimer).

[0115] Regarding the panel-specific PHR, the periodic timer may also satisfy at least one of the following:

[0116] Implementation 3.1: A periodic timer is maintained (or utilized) for all panels,

[0117] Implementation 3.2: A periodic timer is maintained (or utilized) for a panel,

[0118] • Embodiment 3.3: A periodic timer is maintained (or utilized) for a panel group.

[0119] In the case of embodiment 3.1, if the periodic timer expires, the UE may also trigger a panel-specific PHR for all panels.

[0120] In the case of embodiment 3.1, the panel-specific PHR for a certain panel may also be triggered when the triggering event of (5) of embodiment 1.1 occurs. In embodiment 3.1, the PHR triggered by the triggering event of (5) above (the PHR may also be referred to as a periodic PHR) may also be a PHR for all panels. If a panel-specific PHR (panel-specific PHR MAC CE) for any panel is sent, the above-mentioned periodic timer may also be restarted. The above-mentioned periodic timer may also be restarted only when the periodic PHR is sent. According to embodiment 3.1, there is no need to manage multiple periodic timers, thereby reducing the complexity of the UE.

[0121] In the case of embodiment 3.2, if the periodic timer for a certain panel expires, the UE may also trigger a panel-specific PHR for the panel.

[0122] In the case of embodiment 3.2, an independent periodic timer is used for each panel. A panel-specific PHR for a certain panel can also be triggered when the trigger event (5) of embodiment 1.1 for the panel occurs. If a panel-specific PHR (panel-specific PHR MAC CE) for a certain panel is sent, the periodic timer for the panel can also be restarted. According to embodiment 3.2, the PHR for each panel can be appropriately periodically sent.

[0123] In the case of embodiment 3.3, if the periodic timer for a certain panel group expires, the UE may also trigger a panel-specific PHR for the panel group (or any panel belonging to the panel group).

[0124] In the case of embodiment 3.3, an independent periodic timer is used for each panel group. The panel-specific PHR for the panel of a certain panel group can also be triggered when the trigger event (5) of embodiment 1.1 for the panel group occurs. If the panel-specific PHR (panel-specific PHR MAC CE) for any panel of a certain panel group is sent, the periodic timer for the panel group can also be started again. According to embodiment 3.3, the periodic timer is shared in the panel group, and the panel-specific PHR can be sent after the periodic timer has elapsed since the last panel-specific PHR in the panel group was sent. That is, it is possible to suppress the panel-specific PHR based on the periodic timer from being excessively sent.

[0125] In addition, for Embodiments 3.2 and 3.3, as described in Embodiment 3.1, a configuration may be adopted in which the periodic timer is restarted only when a periodic PHR is transmitted.

[0126] Figure 5A as well as Figure 5B This is a diagram showing an example of control related to the periodic timer according to the third embodiment. Figure 5A as well as Figure 5B This figure shows how the UE utilizes the periodic timers of embodiment 3.1. In this example, it is assumed that the UE has four panels (panels #1-#4). PHRs related to these four panels are transmitted via periodic PHRs. In the following figures, the term "PHR" may refer to any PHR (either a periodic PHR or a PHR other than this).

[0127] Figure 5A This shows the situation where the periodic timer is restarted by any panel specific PHR transmission. Figure 5AIn this example, if the PHR for panel #1 is sent, the periodic timer starts again. In this example, before the periodic timer expires, the PHR for panel #2 is sent, and the periodic timer starts again. If the periodic timer expires, the periodic PHR for all panels is triggered / sent.

[0128] exist Figure 5B In FIG, the periodic timer is restarted only by periodic PHR transmission. Figure 5B In the example, even if a panel-specific PHR other than the periodic PHR is sent before the periodic timer expires (in this example, the PHR for panel #2 is triggered by other triggering events), the periodic timer will not be started again and will continue to operate.

[0129] Figure 6A as well as Figure 6B This is a diagram showing another example of control related to the periodic timer according to the third embodiment. Figure 6A as well as Figure 6B The following shows the situation where the UE uses the periodic timer of implementation 3.2 and 3.3 respectively. Figure 6B , imagine that panel group #a includes panels #1 and #2.

[0130] exist Figure 6A In this example, if a PHR for panel #1 is sent, the periodic timer for panel #1 is restarted. If the periodic timer expires, a periodic PHR for panel #1 is triggered / sent. Furthermore, if a PHR for panel #2 is sent, the periodic timer for panel #2 is restarted. If the periodic timer expires, a periodic PHR for panel #2 is triggered / sent. The periodic timers for panel #1 and panel #2 operate independently.

[0131] exist Figure 6B In this example, if the PHR for panel #1 is sent, the periodic timer for panel group #a, to which panel #1 belongs, is restarted. In this example, before the periodic timer expires, the PHR for panel #2 is sent, and the periodic timer for panel group #a, to which panel #2 belongs, is restarted. If the periodic timer expires, the periodic PHR for panels #1 and #2 included in panel group #a is triggered / sent.

[0132] According to the third embodiment described above, the UE can appropriately trigger the transmission of the panel-specific PHR based on a periodic timer.

[0133] <Other>

[0134] In each of the above-mentioned embodiments, considering the reduction of signaling overhead, the reduction of UE complexity, etc., at least one of the same reporting amount, the same parameters, and the same timer may be used for more than one panel or more than one panel group.

[0135] For example, in the first embodiment, a panel group (or multiple panels) may also share the same PHR. In other words, the PHR reported for a panel group CMAX , PH, P-MPR, etc. can also be applied to all panels in the panel group.

[0136] In the second or third embodiment, a panel group (or a plurality of panels) may also share the same inhibit timer / the same periodic timer.

[0137] Whether a panel group (or multiple panels) share the same PHR (or P CMAX or PH or P-MPR or prohibit timer or periodic timer), can be set to the UE through higher layer (e.g., RRC) signaling, can be predetermined by the specification, and can also be determined by the UE capability.

[0138] Each of the above embodiments can be applied when the UE reports specific capability information, or when the UE is configured with specific information associated with the above embodiments through higher layer signaling. If the specific capability information is not reported or the specific information is not configured, the UE may also use the PHR transmission method of Rel.15 / 16.

[0139] For example, the specific capability information may be information indicating that the UE supports at least one of a panel-specific PHR, a prohibition timer for PHR of the panel, and a periodic timer for PHR of the panel.

[0140] For example, the specific information may be information indicating that at least one of the panel-specific PHR, the panel-specific PHR prohibition timer, and the panel-specific PHR periodic timer is activated.

[0141] (Wireless Communication System)

[0142] The following describes a configuration of a wireless communication system according to an embodiment of the present disclosure. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0143] Figure 7This figure shows an example of a schematic configuration of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0144] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0145] 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.

[0146] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0147] The wireless communication system 1 may also include a base station 11 that forms a macrocell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are deployed within the macrocell C1 and form small cells C2 that are narrower than the macrocell C1. User terminals 20 may also be located within at least one of the cells. The configuration and number of cells and user terminals 20 are not limited to those shown in the figure. Hereinafter, when not distinguishing between base stations 11 and 12, they are collectively referred to as base stations 10.

[0148] 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 (CCs) and dual connectivity (DC).

[0149] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0150] Furthermore, in each CC, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0151] Multiple base stations 10 can also be connected by wired (for example, optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 equivalent to the upper station can also be called an integrated access backhaul (IAB) donor, and the base station 12 equivalent to the relay station (relay) can also be called an IAB node.

[0152] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0153] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0154] In the wireless communication system 1, a radio access scheme based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), or single carrier frequency division multiple access (SC-FDMA) may be used.

[0155] The radio access scheme may also be referred to as a waveform. In addition, 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.

[0156] As downlink channels, the wireless communication system 1 may use 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.

[0157] In addition, as uplink channels, the wireless communication system 1 can also use 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.

[0158] User data, higher-layer control information, and system information blocks (SIBs) are transmitted via the PDSCH. User data, higher-layer control information, and the like can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0159] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.

[0160] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0161] In PDCCH detection, a control resource set (CORESET) and a search space can also be used. A CORESET corresponds to the resources for searching for DCI. A search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space settings.

[0162] A search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in this disclosure may be used interchangeably.

[0163] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted via the PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted via the PRACH.

[0164] In the present disclosure, downlink, uplink, etc. may be expressed without the word "link." Furthermore, various channels may be expressed without the word "physical" at the beginning.

[0165] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0166] For example, a synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SSs (PSS, SSS) and PBCHs (and DMRS for PBCHs) may also be referred to as an SS / PBCH block or an SS block (SSB). Furthermore, SSs and SSBs may also be referred to as reference signals.

[0167] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0168] (Base Station)

[0169] Figure 8 This figure shows an example of the configuration of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmitting / receiving unit 120, a transmitting / receiving antenna 130, and a transmission path interface (transmission line interface) 140. Furthermore, more than one of each of the control unit 110, the transmitting / receiving unit 120, the transmitting / receiving antenna 130, and the transmission path interface 140 may be provided.

[0170] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0171] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0172] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. It may also control transmission and reception, measurement, etc., using the transmission and reception unit 120, the transmission and reception antennas 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting up, releasing, etc.) of communication channels, manage the status of the base station 10, manage radio resources, etc.

[0173] The transceiver unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0174] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0175] The transmitting and receiving antenna 130 can be formed of an antenna described based on common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0176] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0177] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmit beam and a receive beam.

[0178] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0179] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing (filtering processing), discrete Fourier transform (DFT) processing (as needed), inverse fast Fourier transform (IFFT) processing), precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0180] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0181] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0182] The transmitting and receiving unit 120 (receiving processing unit 1212) can also apply receiving processing such as analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0183] The transmitting and receiving unit 120 (measuring unit 123) may also perform measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (SINR), signal to noise ratio (SNR)), signal strength (e.g., received signal strength indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0184] The transmission path interface 140 can also send and receive (return signaling) signals between the devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data), control plane data, etc. for the user terminal 20.

[0185] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0186] In addition, the transmitting and receiving unit 120 may also transmit information related to a trigger event related to a certain panel to the user terminal 20. This information may also be at least one of phr-ProhibitTimer, phr-PeriodicTimer, phr-Tx-PowerFactorChange, and a threshold value related to P-MPR ((3) of the first embodiment). This information may be set together with the associated panel (e.g., panel ID) or may not be included in the PHR setting information.

[0187] In addition, the transmitting and receiving unit 120 may also receive a Medium Access Control (MAC) control element (panel-specific PHR MAC CE) related to a Power Headroom Report (PHR) associated with the panel, which is triggered based on the information.

[0188] The triggering event may also include an event such as the expiration of a periodic timer associated with the panel.

[0189] (User Terminal)

[0190] Figure 9 This figure shows an example of the configuration of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Furthermore, more than one of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided.

[0191] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0192] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on common knowledge in the technical field to which this disclosure relates.

[0193] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission, reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals and forward them to the transmission and reception unit 220.

[0194] The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may include a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, and the like, which are described based on common knowledge in the technical fields involved in this disclosure.

[0195] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit or may be composed of a transmitting unit and a receiving unit. The transmitting unit may also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0196] The transmitting and receiving antenna 230 can be formed of an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0197] The transmitting and receiving unit 220 may also receive the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the aforementioned uplink channel, uplink reference signal, etc.

[0198] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0199] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0200] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0201] In addition, whether or not to apply DFT processing may also be based on the transform precoding setting. For a certain channel (e.g., PUSCH), if transform precoding is valid (enabled), the transmitting / receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the aforementioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting / receiving unit 220 (transmitting processing unit 2211) may perform DFT processing as the aforementioned transmission processing without performing DFT processing.

[0202] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0203] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may also perform amplification, filter processing, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 230 .

[0204] The transmitting and receiving unit 220 (receiving processing unit 2212) can also apply receiving processing such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0205] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to received signals. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signals. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0206] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0207] In addition, the control unit 210 may also trigger a power headroom report (PHR) associated with a panel when a trigger event related to the panel occurs.

[0208] The transmitting and receiving unit 220 may also transmit a Medium Access Control (MAC) control element related to the triggered PHR.

[0209] The triggering event may also include an event in which, after the last transmission of a panel-specific PHR associated with the panel, the path loss for at least one activated serving cell of any MAC entity used as a path loss reference for uplink transmission via the panel changes by exceeding a certain threshold.

[0210] The triggering event may also include an event in which the Power Management Maximum Power Reduction (P-MPR) of the panel changes by exceeding a certain threshold after the last transmission of the panel-specific PHR associated with the panel.

[0211] The triggering event may also include an event where an inhibit timer associated with the panel expires or has expired.

[0212] The triggering event may also include an event such as the expiration of a periodic timer associated with the panel.

[0213] The control unit 210 may also trigger the PHR for all panels if the periodic timer expires.

[0214] The control unit 210 may also restart the periodic timer when the MAC CE triggered based on the periodic timer is sent, and not restart the periodic timer when the MAC CE triggered based on other triggering events is sent.

[0215] (Hardware Structure)

[0216] In addition, the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, by wired, wireless, etc.) and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0217] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, resolving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any of them are as described above, and the implementation method is not particularly limited.

[0218] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 10This figure shows an example of the hardware configuration of a base station and a user terminal according to one embodiment. The base station 10 and user terminal 20 described above can also 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, and the like.

[0219] In addition, in this disclosure, the terms such as device, circuit, equipment, section, and unit are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0220] For example, although only one processor 1001 is shown, multiple processors may be present. Furthermore, processing may be performed by a single processor, or by two or more processors simultaneously, sequentially, or using other methods. Furthermore, processor 1001 may be implemented using more than one chip.

[0221] Regarding the various functions in the base station 10 and the user terminal 20, for example, they are achieved by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0222] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, at least a portion of the control unit 110 (210) and the transmitting and receiving unit 120 (220) described above may also be implemented by the processor 1001.

[0223] In addition, the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002 and performs various processes based on them. As a program, a program that causes a computer to perform at least a portion of the operations described in the above embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks can also be implemented similarly.

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

[0225] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, or a key drive), a magnetic stripe, a database, a server, or other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0226] The communication device 1004 is hardware (a transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. To implement at least one of frequency division duplex (FDD) and time division duplex (TDD), the communication device 1004 may also include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the aforementioned transmitting and receiving unit 120 (220), transmitting and receiving antenna 130 (230), and the like may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0227] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to the outside (e.g., a display, speaker, light emitting diode (LED) lamp, etc.). Alternatively, the input device 1005 and the output device 1006 may be integrated (e.g., a touch panel).

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

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

[0230] (Variation)

[0231] In addition, the terms described in this disclosure and the terms required for understanding this disclosure may also be replaced with terms having the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, or may be referred to as a pilot, pilot signal, etc. depending on the applied standard. In addition, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

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

[0233] Here, the parameter set may also be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, radio frame structure, specific filter processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, and the like.

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

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

[0236] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units used for signal transmission. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective equivalents. Furthermore, the terms frame, subframe, time slot, mini-time slot, and symbol may be used interchangeably in this disclosure.

[0237] For example, a subframe can be called a TTI, multiple consecutive subframes can be called a TTI, and a slot or a mini-slot can be called a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Furthermore, the unit representing a TTI can be called a slot, a mini-slot, or the like, rather than a subframe.

[0238] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communications. For example, in the LTE system, a base station schedules each user terminal by allocating radio resources (such as the frequency bandwidth and transmit power available to each user terminal) in TTI units. The definition of TTI is not limited to this.

[0239] The TTI may also be a unit of time for transmitting channel-coded data packets (transport blocks), code blocks, code words, etc., and may also be a unit of processing for scheduling, link adaptation, etc. Furthermore, when a TTI is given, the time interval (e.g., the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

[0240] In addition, when a time slot or a mini-time slot is called a TTI, one or more TTIs (i.e., one or more time slots or one or more mini-time slots) can also be the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) that constitute the minimum time unit for scheduling can also be controlled.

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

[0242] In addition, long TTI (for example, normal TTI, subframe, etc.) can also be replaced by TTI with a time length exceeding 1ms, and short TTI (for example, shortened TTI, etc.) can also be replaced by TTI with a TTI length smaller than long TTI and greater than 1ms.

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

[0244] In addition, an RB in the time domain may include one or more symbols, or may be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks.

[0245] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0246] 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.

[0247] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a particular parameter set within a particular carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0248] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0249] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific channels / signals outside of the activated BWP.

[0250] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0251] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

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

[0253] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

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

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

[0256] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0257] In addition, physical layer signaling may also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. In addition, MAC signaling may also be notified using, for example, a MAC Control Element (CE).

[0258] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0259] The determination can be made by a value represented by a bit (0 or 1), a true or false value (Boolean value) represented by true (true) or false (false), or by comparison of numerical values (for example, comparison with a specific value).

[0260] The term “software” or “firmware” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, or the like.

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

[0262] The terms "system" and "network" used in this disclosure can be used interchangeably. "Network" may also refer to devices included in the network (eg, base stations).

[0263] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)" "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission 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", and "panel" can be used interchangeably.

[0264] In this disclosure, terms such as "base station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP))", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. In some cases, a base station may be referred to as a macro cell, small cell, femto cell, or pico cell.

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

[0266] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (UE)”, and “terminal” can be used interchangeably.

[0267] 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, hand set, user agent, mobile client, client, or several other appropriate terms.

[0268] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Furthermore, at least one of the base station and the mobile station may also be a device mounted on a mobile object, a mobile object itself, etc. The mobile object may be a means of transportation (e.g., a vehicle, an aircraft, etc.), a mobile object that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing communication operations. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0269] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by communication between multiple user terminals (for example, which may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be configured such that the user terminal 20 has the functions of the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0270] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0271] In the present disclosure, actions are assumed to be performed by a base station, and sometimes, depending on the circumstances, by its upper node. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, a Mobility Management Entity (MME)), a Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0272] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched between them during execution. Furthermore, the processing procedures, sequences, flow charts, and the like of the various methods / implementations described in this disclosure may be reversed as long as they do not conflict. For example, the methods described in this disclosure use an illustrative order to present elements of various steps, but are not limited to the specific order presented.

[0273] The various modes and embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER3G, 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 (Ultra Mobile Broadband), and other technologies. Broadband (UMB)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB)), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems based on these. In addition, multiple systems can also be combined for application (for example, LTE or LTE-A, combination with 5G, etc.).

[0274] The phrase “based on” used in this disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on.”

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

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

[0277] In addition, "judgment (decision)" can also be a situation where receiving (for example, receiving information), transmitting (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0278] Furthermore, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. can be considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where certain actions can be considered as "judgment (decision)".

[0279] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0280] 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 the two elements being "connected" or "coupled." The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected" may be replaced by "access."

[0281] In the present disclosure, when two elements are connected, it is possible to consider them being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0282] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other." Alternatively, the term may also mean "A and B are each different from C." Terms such as "separate" and "bound" may also be interpreted in the same manner as "different."

[0283] When the terms "include," "including," and variations thereof are used in this disclosure, these terms, like the term "comprising," have an inclusive meaning. Furthermore, the term "or" used in this disclosure does not mean an exclusive OR.

[0284] In the present disclosure, when an article is added by translation, such as a, an, and the in English, the present disclosure may also include a case where the noun following the article is in a plural form.

[0285] While the inventions disclosed herein have been described in detail above, it will be apparent to those skilled in the art that the inventions disclosed herein are not limited to the embodiments described herein. The inventions disclosed herein can be implemented in modified and altered forms without departing from the spirit and scope of the invention as defined by the claims. Therefore, the descriptions in this disclosure are for illustrative purposes only and are not intended to limit the inventions disclosed herein in any way.

Claims

1. A terminal comprising: The sending unit reports information related to the number of panels using the capability information; a receiving unit for receiving a higher layer signaling related to the number of panels notified in a media access control element MAC CE; as well as a control unit configured to trigger a panel-specific power headroom report (PHR) associated with a plurality of panels notified by the higher layer signaling, if a power management maximum power reduction (P-MPR) of at least one panel among the plurality of panels changes by exceeding a threshold value after the last transmission of the power headroom report (PHR) associated with the plurality of panels notified by the higher layer signaling, The sending unit sends the MAC CE related to the triggered PHR, wherein the MAC CE includes information related to the PHR of each of the multiple panels of the number of panels notified through the higher layer signaling, and information related to the maximum output power of each of the multiple panels.

2. A wireless communication method for a terminal, comprising: Steps for utilizing capability information to report information related to panel quantities; The step of receiving higher layer signaling related to the number of panels notified in a medium access control element MAC CE; and a step of triggering a panel-specific Power Headroom Report (PHR) associated with the plurality of panels notified by the higher layer signaling, if a Power Management Maximum Power Reduction (P-MPR) of at least one panel among the plurality of panels changes by exceeding a threshold value after the last transmission of Power Headroom Reports (PHRs) associated with the plurality of panels notified by the higher layer signaling; and a step of sending the MAC CE related to the triggered PHR, wherein the MAC CE includes information related to the PHR of each of the plurality of panels of the number of panels notified through the higher layer signaling, and information related to the maximum output power of each of the plurality of panels.

3. A base station comprising: a receiving unit that receives information related to the number of panels reported from the terminal using the capability information; a sending unit for sending a higher layer signaling related to the number of panels notified in a media access control element MAC CE; as well as The control unit determines that a panel-specific PHR associated with the plurality of panels is triggered when a power management maximum power reduction (P-MPR) of at least one panel among the plurality of panels exceeds a threshold value and changes after the last transmission of the power headroom reports (PHRs) associated with the plurality of panels notified by the higher layer signaling based on the terminal, The receiving unit receives the MAC CE related to the triggered PHR, and the MAC CE includes information related to the PHR of each of the multiple panels of the number of panels notified through the high-layer signaling, and information related to the maximum output power of each of the multiple panels.

4. A system having a terminal and a base station, The terminal has: The sending unit reports information related to the number of panels using the capability information; a receiving unit for receiving a higher layer signaling related to the number of panels notified in a media access control element MAC CE; as well as a control unit configured to trigger a panel-specific power headroom report (PHR) associated with a plurality of panels notified by the higher layer signaling, if a power management maximum power reduction (P-MPR) of at least one panel among the plurality of panels changes by exceeding a threshold value after the last transmission of the power headroom report (PHR) associated with the plurality of panels notified by the higher layer signaling, The sending unit sends the MAC CE related to the triggered PHR, where the MAC CE includes information related to the PHR of each of the plurality of panels whose number is notified through the higher layer signaling, and information related to the maximum output power of each of the plurality of panels. The base station has: a receiving unit, receiving a report utilizing the capability information; as well as A sending unit, sending the high-layer signaling, The receiving unit further receives the MAC CE.

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