Terminal, radio communication method, and base station

Abstract

To provide a terminal, a radio communication method, and a base station that improve communication quality / throughput.SOLUTION: In a next generation mobile communication system, in a terminal UE, a receiving section receives, from a network (NW), a medium access control element (MAC CE) indicating at least one of activation or deactivation of a semi-persistent channel state information reference signal (SP-CSI-RS) for layer 1-reference signal received power (L1-RSRP) measurement, and activation or deactivation of the SP-CSI-RS for CSI acquisition, and a control section controls, on the basis of the MAC control element, at least one of activation or deactivation of the SP-CSI-RS for L1-RSRP measurement, and activation or deactivation of the SP-CSI-RS for CSI acquisition.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified with the aim of achieving higher data rates and lower latency (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified with the aim of achieving higher capacity and more advanced features than LTE (Third Generation Partnership Project (3GPP (registered trademark)) 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) 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] It is being considered that future wireless communication systems (e.g., NR, Rel. 19 and later) will support event-based beam reporting initiated by a terminal (user terminal, User Equipment (UE)) (also referred to as event-triggered beam reporting / UE-initiated Beam Report (UEIBR)).

[0006] Such beam reporting is being considered for support in MIMO / mobility from Rel. 19 onwards.

[0007] However, there are cases where UE / IB / mobility is not sufficiently considered. If this consideration is insufficient, it may not be possible to achieve lower latency communications, which may result in a suppression of improvements in communication quality / throughput.

[0008] Therefore, one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can improve communication quality / throughput. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes: a receiving unit that receives a Medium Access Control (MAC) control element that instructs at least one of activating or deactivating a semi-persistent channel state information reference signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating an SP-CSI-RS for CSI acquisition; and a control unit that controls at least one of activating or deactivating the SP-CSI-RS for L1-RSRP measurement and activating or deactivating the SP-CSI-RS for CSI acquisition based on the MAC control element. [Effects of the Invention]

[0010] According to one aspect of the present disclosure, communication quality / throughput can be improved. [Brief explanation of the drawings]

[0011] [Figure 1] Fig. 1A is a diagram showing an example of UE movement in Rel. 17. Fig. 1B is a diagram showing an example of UE movement in Rel. 18. [Figure 2] Figure 2A illustrates an example of an SP CSI-RS / CSI-IM resource set activation / deactivation MAC CE. Figure 2B illustrates an example of an SP ZP CSI-RS resource set activation / deactivation MAC CE. [Figure 3] FIG. 3 is a diagram illustrating an example of activation / deactivation of an SP-CSI-RS for L1-RSRP measurement / CSI acquisition according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a diagram illustrating an example of a configuration of a base station according to an embodiment of the present disclosure. [Figure 6] FIG. 6 is a diagram illustrating an example of a configuration of a terminal according to an embodiment of the present disclosure. [Figure 7] FIG. 7 is a diagram illustrating an example of a hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] (L1 / L2 inter-cell mobility) The UE may perform UL transmission to one or more cells / TRPs. The following scenario 1 or scenario 2 may be considered as a procedure in this case. In the present disclosure, the serving cell may be replaced with the TRP in the serving cell. Layer 1 / layer 2 (L1 / L2) and DCI / Medium Access Control Control Element (MAC CE) may be replaced with each other. In the present disclosure, a physical cell identity (PCI) different from the physical cell identity (PCI) of the current serving cell may be simply referred to as a "different PCI." A non-serving cell, a cell having a different PCI, and an additional cell may be replaced with each other.

[0013] <Scenario 1> Scenario 1 corresponds to, for example, multi-TRP inter-cell mobility, but may also be a scenario that does not correspond to multi-TRP inter-cell mobility.

[0014] (1) The UE receives from the serving cell the configuration necessary to use radio resources for data transmission and reception, including SSB configuration for beam measurement of a TRP corresponding to a PCI different from that of the serving cell, and resources of the different PCI. (2) The UE performs beam measurement of the TRPs corresponding to different PCIs and reports the beam measurement results to the serving cell. (3) Based on the above report, the Transmission Configuration Indication (TCI) states associated with the TRPs corresponding to different PCIs are activated by L1 / L2 signaling from the serving cell. (4) The UE transmits and receives using UE-dedicated channels on TRPs corresponding to different PCIs. (5) The UE must always cover the serving cell, including in the case of multiple TRPs. As in conventional systems, the UE must use common channels from the serving cell, such as the Broadcast Control Channel (BCCH) and the Paging Channel (PCH).

[0015] In Scenario 1, when the UE transmits and receives signals to and from an additional cell / TRP (a TRP corresponding to the PCI of the additional cell), the serving cell (the serving cell assumed by the UE) is not changed. The UE is configured with higher layer parameters related to the PCI of non-serving cells from the serving cell. Scenario 1 may be applied, for example, in Rel. 17.

[0016] Figure 1A shows an example of UE movement in Rel. 17. Assume that the UE moves from a cell (serving cell) with PCI #1 to a cell (additional cell) with PCI #3 (which overlaps with the serving cell). In this case, Rel. 17 does not support switching of the serving cell via L1 / L2.

[0017] An additional cell is a cell with an additional PCI that is different from the PCI of the serving cell. The UE can receive / transmit UE-dedicated channels from the additional cell. The UE needs to be within the coverage of the serving cell to receive UE common channels (e.g., system information / paging / short messages). When the UE moves out of the coverage of the serving cell, a cell change is required, for example, by handover (also known as L3 mobility).

[0018] <Scenario 2> In scenario 2, L1 / L2 inter-cell mobility is applied. With L1 / L2 inter-cell mobility, the serving cell can be changed using functions such as beam control without RRC reconfiguration. In other words, transmission and reception with an additional cell is possible without handover. Since handover requires RRC reconnection and creates a period when data communication is unavailable, by applying L1 / L2 inter-cell mobility that does not require handover, data communication can be continued even when the serving cell is changed. Scenario 2 may be applied in Rel. 18, for example. In scenario 2, for example, the following procedure is performed.

[0019] (1) The UE receives from the serving cell the SSB configuration of a cell (additional cell) with a different PCI for beam measurement / serving cell change. (2) The UE performs beam measurements of cells using different PCIs and reports the measurement results to the serving cell. (3) The UE may receive a configuration of a cell with a different PCI (serving cell configuration) through higher layer signaling (e.g., RRC). That is, a pre-configuration regarding a serving cell change may be performed. This configuration may be performed together with the configuration in (1) or separately. (4) Based on the above report, the TCI states of cells with different PCIs may be activated by L1 / L2 signaling according to the change of serving cell. The activation of the TCI states and the change of serving cell may be performed separately. (5) The UE changes the serving cell (assumed serving cell) and starts receiving / transmitting using the pre-configured UE-specific channel and TCI state.

[0020] That is, in Scenario 2, the serving cell (the assumed serving cell in the UE) is updated by L1 / L2 signaling. Scenario 2 may be applied in Rel. 18.

[0021] Figure 1B shows an example of UE mobility in Rel. 18. In Rel. 18, the serving cell is switched by L1 / L2 (e.g., DCI / MAC CE). The UE can receive / transmit UE-dedicated channels / common channels to / from the new serving cell (or target serving cell). The UE may move out of the coverage of the current serving cell (e.g., current serving cell).

[0022] (Event-triggered Beam Report / UE-initiated Beam Report (UEIBR)) It is being considered that future wireless communication systems (e.g., Rel. 19 and later) will support event-based beam reporting, which may also be called event-triggered beam reporting or UE-initiated beam reporting (UEIBR).

[0023] UEIBR / UE initiated beam management (UEIBM) can be used for measurement reporting / beam switching / cell switching etc.

[0024] <Applicable cases> The UEIBR may be applied, for example, in at least one of the following cases 1 and 2: Case 1: L1-RSRP / SINR beam reporting with serving cell PCI / additional PCI (e.g., L1-RSRP / SINR beam reporting with serving cell / additional PCI cells for Rel. 18 L1 / L2 mobility with L1 / L2 inter-cell mobility / intra-cell multi-TRP (M-TRP inter-cell) / cell switching). · Case 2: L1-RSRP / SINR beam reporting including only serving cell PCI.

[0025] When a specific event occurs (in this disclosure, it may be read as when specific conditions are met / not met, when it matches a specific event, etc.), the UE may report measurement results (for example, at least L1-RSRP / L1-SINR and corresponding resource indicators / RS indices) to the NW.

[0026] The specific event may be at least one of, for example, an event related to at least one of the serving cell and additional cells, and an event related to beam reporting including at least one of the PCI of the serving cell and the PCI of the additional cells.

[0027] <Trigger conditions / events for UE IBR for Rel. 19> UE IBR may be triggered when a certain condition (event) is met. For example, the UE may apply different / the same conditions / events for the trigger of the following beam reporting.

[0028] · UE feature #1: UE IBR for Rel. 19 MIMO. · UE feature #2: UE IBR for Rel. 19 mobility.

[0029] Different UE capabilities may be introduced / defined between UE features #1 and #2. Also, different upper layer parameters may be set to enable each UE feature. UE features and UE capabilities may be read as each other.

[0030] The UE does not expect UE features #1 and #2 to be set simultaneously in a certain BWP / CC / band / frequency band / frequency (or for each UE).

[0031] The UE may simultaneously set UE features #1 and #2 in a certain BWP / CC / band / frequency band / frequency (or for each UE). For example, if set, the UE may pre-define which event (which UE feature) to prioritize, or it may be set / instructed by upper layer signaling / physical layer signaling.

[0032] This disclosure may be applied in the unified TCI framework.

[0033] This disclosure may be applied only when the corresponding UE capabilities are reported. Alternatively, this disclosure may be applied only when the corresponding upper layer parameters (e.g., RRC) are notified / reported.

[0034] <UE IBR for MIMO> Regarding the UE IBR for MIMO in Rel.19, the following may apply.

[0035] · MAC CE in PUSCH. · UCI in periodic / semi-persistent PUCCH, UCI in dynamic grant (DG) / configured grant (CG) PUSCH. · The relationship between the above MAC CE-based method and UCI-based method. For example, two independent methods may be configurable. Alternatively, in addition to the MAC CE-based method, the UCI-based method may be applicable (a combination of two methods (2-step method) may be applied).

[0036] The content of the report may basically be the same as the existing L1 beam measurement report, and may include, for example, at least one of the following. · SSBRI / CRI. · The number of beams X reported. · The selection method for X beams. <H · L1-RSRP / SINR (absolute value / difference value) for each SSBRI / CRI. When MAC CE is used, An indicator of whether the next octet is included. If MAC CE / UCI is used, Serving cell ID, BWP ID (if the report requires activation of TCI state or beam switching).

[0037] Events related to UEIBR for MIMO may be broadly categorized into the following event types: Event 1: The quality of the current beam becomes worse than a certain threshold. Event 2: The quality of at least one new beam (e.g., L1-RSRP) becomes better than a certain threshold compared to the quality of the current beam. Event 3: The quality of the new beam is better than a certain threshold. Event 4: The quality of the current beam becomes worse than a first threshold and the quality of at least one new beam becomes better than a second threshold. Event 5: The absolute value of the difference between the quality of the current beam and the quality of at least one new beam falls below a certain threshold. Event 6: The current beam is no longer among the best K (more than 1: K>1) beams (among the beams configured for measurement / reporting). Event 7: The quality of at least one new beam (e.g. L1-RSRP) becomes better than the quality of the Qth (Q may be M, Q or M may be greater than or equal to 1, Q or M may be configured by RRC (based on UE capability reporting)) RS derived from the activated (active) TCI state by more than a threshold. Event 8: The quality (e.g., L1-RSRP) of M (more than 1: M>1) new beams becomes better than the current beam by more than a threshold. Event 9: The quality of at least one new beam (e.g. L1-RSRP) becomes better than the configured reference RS (which may be SSB / CSI-RS) by more than a threshold.

[0038] It should be noted that the events exemplified in this manner do not exclude other events.

[0039] Priorities may be defined for events 1 to 9. For example, among events 1 to 9, a specific event (e.g., event 2) may have the highest priority (e.g., event 2 may be determined to take precedence).

[0040] For example, in event 2, the current beam may be determined / derived based on the QCL RS (e.g., QCL source RS) in the indicated TCI state.

[0041] For example, for the current beam in event 2, at least one of the following beam options 2a to 2c may be supported: Beam Option 2a: The RS corresponding to the current beam is implicitly derived / determined based on the QCL RS of the indicated TCI state. Beam Option 2b: The RS corresponding to the current beam is the QCL RS in the indicated TCI state and the QCL SSB. · Beam Option 2c: The RS corresponding to the current beam is [explicitly] configured / indicated using RRC signaling / MAC CE.

[0042] For example, for the new beam in event 2, at least one of the following beam options 3a to 3c may be supported: Beam Option 3a: The RS corresponding to the new beam is configured [explicitly] using RRC signaling (e.g., reconfiguration of existing RS measurements or TCI state configuration parameters (e.g., TCI-State)) / MAC CE. Beam Option 3b: The RS corresponding to the new beam is implicitly derived / determined based on the QCL RS of the TCI state to be activated (active TCI state). Beam Option 3c: The RS corresponding to the new beam is implicitly derived / determined based on the QCL RS of one or more TCI states in the configured subset of the list of TCI states configured in RRC (configured TCI states).

[0043] For example, for the reference signal measurement (RS measurement) of the current beam for Event 2 (and Beam Option 2a), several schemes may be supported: Scheme 1: The RS of the current beam is the QCL RS in the indicated TCI state. Scheme 2: The RS of the current beam is the QCL RS and the QCLed SSB in the indicated TCI state.

[0044] If there are two QCL RSs in the indicated TCI state, the QCL RSs may be QCL type D.

[0045] At least one of CSI-RS and SSB may be supported as the QCL RS configured / applied to the indicated TCI state. When CSI-RS is configured / applied as the QCL RS, at least one of a tracking CSI-RS (TRS) and a measurement CSI-RS may be supported. The measurement CSI-RS may be the CSI-RS used for L1-RSRP / L1-SINR or the CSI-RS used for beam management (BM).

[0046] In scheme 1, only a TRS (for example, one tracking CSI-RS) may be configured as a QCL-RS (for example, type A / D) in the indication TCI state.

[0047] When only a TRS is set as the QCL-RS for the indicated TCI state, a reference signal different from the TRS (e.g., an RS corresponding to the TRS) may be selected for measuring / reporting the RS of the current beam.

[0048] For RS measurements on the current beam in Event 2 / Option 2a, [in addition to Schemes 1 and 2], when only one TRS is set to the indicated TCI state, at least one of the following processing options 1 to 4 may be applied:

[0049] Processing option 1: An additional scheme is introduced. The RS for the current beam can be the CSI-RS for beam management derived from the QCL RS in the indicated TCI state. Processing Option 2: TRS is additionally supported as the measured RS of the current beam to determine the L1-RSRP. Processing option 3: An additional scheme is introduced: the RS for the current beam is explicitly configured / indicated by the RRC or MAC CE. Processing option 4: No further expansion is performed.

[0050] The explicit RS configuration for measurement of the new beam in event 2 may be configured in one RS resource set associated with the CSI reporting configuration.

[0051] In this case, if the existing UE capability cannot be reused, a UE capability indicating the maximum number of RSs configured in the RS resource set may be defined / introduced.

[0052] The RSs in the one RS resource set may be updated by the MAC CE.

[0053] The UE IBR for MIMO may be transmitted using UCI.

[0054] In a UCI-based UEIBR procedure, the following modes may be supported:

[0055] <<Mode A>> Mode A relates to dynamic scheduling of UCI by the NW (gNB). That is, in Mode A, resources for UCI are scheduled by the gNB. Mode A may be a basic function of the UE (a UE that supports UE-IBR may naturally support this function).

[0056] Step 1: The UE transmits a first UL channel (e.g., PUCCH), which is an UL channel that notifies / requests a second UL channel (e.g., PUCCH) for transmitting a beam report, and may consist of one or more bits.

[0057] Step 2: The UE detects a DCI format (which may be referred to as a first DL signal) indicating a second UL channel resource.

[0058] Step 3: The UE transmits a beam report using resources (UCI) on the second UL channel.

[0059] For mode A, at least a one-bit indication in the first UL channel (PUCCH) may be supported to request resources in the second UL channel for transmitting a beam report.

[0060] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0061] An RRC parameter (e.g., reportResourceRequest-UEIBR) corresponding to the one-bit indication (for setting the one-bit indication) may be defined, and the RRC parameter may be identified using a specific ID (e.g., a dedicated SchedulingRequestId).

[0062] Also, an RRC parameter for periodic PUCCH resource configuration (e.g., firstPUCCHResourceConfig-ModeA-UEIBR) corresponding to the one-bit indication may be defined. The RRC parameter may not be associated with an SR ID (e.g., SchedulingRequestId).

[0063] The RRC parameters may include, for example, a periodicity and offset setting parameter (periodicityAndOffset) and a PUCCH resource ID (for example, PUCCH-ResourceID).

[0064] These RRC parameter specifications may be applied to the case where at least one CC (single CC) is used.

[0065] The DCI format in step 2 may be, for example, an UL grant DCI (for example, DCI format 0_1 / 0_2 / 0_3), and the second UL channel in step 3 may utilize at least a PUSCH.

[0066] Furthermore, the DCI format in step 2 may be, for example, DL grant DCI (for example, DCI format 1_1 / 1_2), and the second UL channel in step 3 may be PUCCH.

[0067] A 1-bit field may be newly defined in the DL grant DCI to instruct transmission of the UEIBR.

[0068] The PUCCH resources intended for HARQ-ACK transmission may be (re)used to transmit both HARQ-ACK and UEIBR.

[0069] <<Mode B>> Mode B relates to UCI within pre-configured resources for the second UL channel.

[0070] Step 1: The UE transmits a first UL channel (e.g., PUCCH). The first UL channel is an UL channel that indicates a second UL channel for transmitting a beam report, and may be configured with one or more bits. The first UL channel may be configured with one or more bits.

[0071] Step 2: The UE transmits a beam report in the second UL channel (eg, using a specific resource (UCI) within the channel).

[0072] Note that the notification in step 1 may be included in a separate reporting instance from the beam report in step 2.

[0073] For Mode B, at least a one-bit indication in the first UL channel (PUCCH) may be supported to indicate that the second UL channel is used to transmit a beam report.

[0074] In this case, periodic PUCCH resources (PUCCH format 0 / 1) may be configured by dedicated higher layer signaling.

[0075] In either of the above-mentioned modes A / B, cross-CC (component carrier) beam reporting may be supported.

[0076] An RRC parameter (e.g., reportResourceRequest-UEIBR) corresponding to the one-bit indication (for setting the one-bit indication) may be defined, and the RRC parameter may be identified using a specific ID (e.g., a dedicated SchedulingRequestId).

[0077] Also, an RRC parameter for periodic PUCCH resource configuration (e.g., firstPUCCHResourceConfig-ModeB-UEIBR) corresponding to the one-bit indication may be defined. The RRC parameter may not be associated with an SR ID (e.g., SchedulingRequestId).

[0078] The RRC parameters may include, for example, a periodicity and offset setting parameter (periodicityAndOffset) and a PUCCH resource ID (for example, PUCCH-ResourceID).

[0079] These RRC parameter specifications may be applied to the case where at least one CC (single CC) is used.

[0080] The second UL channel in step 2 may be, for example, a Type 1 Configured Grant (CG) PUSCH or a PUCCH.

[0081] <UEIBR for mobility> With respect to UEIBR for Rel. 19 mobility (e.g., LTM), the following may apply:

[0082] ·MAC CE on semi-persistent / aperiodic PUSCH. UCI in periodic / semi-persistent PUCCH, UCI in semi-persistent / aperiodic PUSCH.

[0083] The contents of the report may include, for example, at least one of the following: If the measurement report is used for cell switching reporting, in addition to MIMO related information: -Indicator of cell switching or TA related information. Otherwise (if the measurement report is not used for cell switch reporting), · The same content as MIMO-related information (only difference is whether it is intra-cell or inter-cell).

[0084] The supported events may be similar to Conditional Hand-Over (CHO).

[0085] For example, since candidate cells are set based on L3 measurement reports, L1-RSRP / SINR may be used as the threshold.

[0086] If reporting is used for cell switch commands, specific domain filters (eg time / frequency / space) may be considered / applied to prevent frequent switches.

[0087] It may also be specified whether flexibility in triggering time (eg, 5 ms, 10 ms, 20 ms) is required.

[0088] In the case of L1 measurements by UEIBR, at least the results of beam level measurements may be used for event evaluation.

[0089] Events related to UEIBR for Mobility may be broadly categorized into the following event types: Event LTM2: The beam quality of the serving cell becomes worse than the (absolute) threshold. · Event LTM3: The beam quality of the candidate cell becomes better than the beam quality of the serving cell by more than a certain offset amount. · Event LTM4: The beam quality of the candidate cell becomes worse than the (absolute) threshold. Event LTM5: The beam quality of the serving cell becomes worse than a first (absolute) threshold and the beam quality of the candidate cell becomes better than a second (absolute) threshold.

[0090] Note that the events exemplified in this way do not exclude other events. Also, the above-mentioned MIMO events may be appropriately used (in this case, the "current beam" may be read as the "beam of the serving cell," and the "new beam" may be read as the "beam of the candidate cell," respectively). The events that are used / replaced may be called mobility / LTM events corresponding to the MIMO events.

[0091] In the L1 measurement resource configuration in the LTM configuration, both SSB and CSI-RS beam configurations may be supported.

[0092] In events LTM3 and LTM5, the same type of RS (eg, CSI-RS / SSB) may be used in both the serving cell and the candidate cell (neighbor cell).

[0093] Mobility event evaluation may apply at least one of the following: time to trigger (TimeToTrigger (TTT)), hysteresis for entering / leaving, and beam-specific / cell-specific offsets.

[0094] A mobility-oriented UE IBR may be transmitted using the MAC CE.

[0095] <Definition of terms for specific events> In the above-mentioned existing events, the definitions of serving (cell) and neighbor (cell) may be rephrased / updated as follows in the UEIBR for Rel.19:

[0096] For example, the serving [cell], SpCell, and PCell in existing L3 events may be interchangeably read as the current beam (e.g., RS ID associated with the indicated [joint / DL] TCI state) in event-triggered beam reporting for Rel. 19 MIMO.

[0097] In addition, the serving [cell], SpCell, and PCell in existing L3 events may be interchangeably read as the current beam (e.g., the RS ID associated with the indicated [joint / DL] TCI state) or the beam of the serving cell (e.g., the RS ID associated with the TCI state for the PCI of the serving cell) in event-triggered beam reporting for Rel.19 mobility.

[0098] Neighbors [cells] in existing L3 events may be interchangeably referred to as other beams (e.g., RS IDs that are not associated with the indicated [joint / DL] TCI state but are associated with the RS ID for L1 beam measurements) in event-triggered beam reporting for Rel.19 MIMO (which may be mobility).

[0099] In addition, neighbor [cell] in existing L3 events may be interchangeably read as the beam of a non-serving cell / target cell / candidate cell (e.g., the RS ID associated with the TCI state for the PCI of the target cell / candidate cell) in event-triggered beam reporting for Rel.19 mobility.

[0100] The measurement value of each reference signal (RS) may be RSRP / SINR, L3-RSRP / SINR, L1-RSRP / SINR, or an average value of multiple L1-RSRP / SINRs.

[0101] For example, L1-RSRP / SINR may change dynamically, so by averaging multiple (X) L1-RSRP / SINR values ​​(e.g., X=5), control hunting (frequent switching of trigger states) in triggering beam reporting can be avoided.

[0102] (MAC CE for Semi-Persistent CSI-RS) Existing specifications (up to Rel. 18) specify MAC CE for activating / deactivating resource sets of semi-persistent (SP) CSI-RS / CSI-IM / zero power (ZP) CSI-RS.

[0103] FIG. 2A illustrates an example of an SP CSI-RS / CSI-IM resource set activation / deactivation MAC CE.

[0104] The MAC CE contains the following fields: A / D field, indicating whether to activate or deactivate. ·Serving Cell ID field to which MAC CE applies. ·BWP ID field, indicating the DL BWP to which the MAC CE applies. A SP CSI-RS Resource Set ID field indicating the NZP CSI-RS resource set to be activated or deactivated. A CSI-IM Resource Set ID field that indicates the CSI-IM resource set to be activated or deactivated. An IM field that indicates the presence of an octet containing the CSI-IM resource set ID field. If the IM field indicates 0, it indicates that the octet is not present. A TCI State ID field indicates the TCI state used as a QCL source for resources in the SP CSI-RS resource set indicated by the SP CSI-RS Resource Set ID field. The nth TCI State field (n is an integer from 0 to N) corresponds to the TCI state for the n+1th resource in the resource set. Reserved Bits (R) field, set to 0.

[0105] FIG. 2B illustrates an example of an SP ZP CSI-RS resource set activation / deactivation MAC CE.

[0106] The MAC CE may contain the following fields: A / D field, indicating whether to activate or deactivate. ·Serving Cell ID field to which MAC CE applies. ·BWP ID field, indicating the DL BWP to which the MAC CE applies. An SP ZP CSI-RS Resource Set ID field indicating the SP ZP CSI-RS resource set to be activated or deactivated. Reserved Bits (R) field, set to 0.

[0107] The MAC CE shown in FIGS. 2A and 2B is applied only to the serving cell.

[0108] (analysis) In future wireless communication systems (e.g., Rel. 19 and later), it is considered that SP-CSI-RS will be supported for both L1-RSRP measurement and CSI acquisition for candidate cells.

[0109] In this case, it is necessary to introduce a new MAC CE for activating / deactivating the SP-CSI-RS.

[0110] On the other hand, it is necessary to consider the RRC configuration for the CSI-RS resource set for the SP-CSI-RS, which is different from the existing CSI-RS resource set for the serving cell.

[0111] For example, in the case of L1-RSRP measurements for candidate cells, one measured CSI[-RS] resource set may include NZP-CSI-RS resources associated with different candidate cells.

[0112] For example, in the case of CSI acquisition for a candidate cell, one measured CSI[-RS] resource set may include NZP-CSI-RS resources associated with one candidate cell.

[0113] For example, the NZP-CSI-RS resource may be configured under the LTM TCI information for each candidate cell.

[0114] Therefore, it is necessary to consider how to activate / deactivate the CSI-RS for candidate cells for each purpose. However, there has been insufficient research into this specific method.

[0115] If this consideration is insufficient, appropriate operation related to UEIBR / LTM cannot be achieved, which may result in suppression of improvement in communication quality / throughput.

[0116] Therefore, the present inventors came up with a method for solving these problems.

[0117] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to the embodiments / options may be applied independently or in combination. The present disclosure also provides embodiments / options that are configured by combining part or all of one embodiment / option with part or all of another embodiment / option.

[0118] (Various reading changes) In this disclosure, words enclosed in "()" in a sentence may indicate an explanation of the immediately preceding wording (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc. Also, in this disclosure, words enclosed in "[ ]" in a sentence may be interpreted including the meaning of the entire sentence, or may be interpreted excluding the meaning of the entire sentence (ignoring the meaning of the entire sentence). Note that "()" and "[ ]" may also be used for purposes / meanings other than those mentioned above.

[0119] In the present disclosure, "A / B" and "at least one of A and B" may be interpreted interchangeably. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C."

[0120] In the present disclosure, terms such as notify, activate, deactivate, indicate (or indicate), select, configure, update, and determine may be interchangeable. In the present disclosure, terms such as support, control, controllable, operate, and operate may be interchangeable.

[0121] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, fields, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CEs), update commands, activation / deactivation commands, etc. may be interchangeable.

[0122] In the present disclosure, signaling, message, field, parameter, information, payload, etc. may be read interchangeably.

[0123] In the present disclosure, higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, Non-Access Stratum (NAS) signaling (of the control plane), other messages (e.g., messages communicated to and from the core network, such as positioning protocol (e.g., NR Positioning Protocol A (NRPPa) / LTE Positioning Protocol (LPP)) messages), or a combination thereof.

[0124] In the present disclosure, MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. 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.

[0125] In the present disclosure, physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like.

[0126] In the present disclosure, base station, gNB, and network (NW) may be interpreted as interchangeable.

[0127] In the present disclosure, cell group, serving cell group, master cell group (MCG), and secondary cell group (SCG) may be interchangeable. L1 / L2, L1 / L2 signaling, and DCI / MAC CE may be interchangeable. A serving cell may be replaced with a cell that transmits a PDSCH. A candidate cell may refer to a cell that is a candidate to become a serving cell through L1 / L2 inter-cell mobility. L1L2-triggered mobility (or lower layer triggered mobility, LTM) and L1 / L2 inter-cell mobility may be interchangeable.

[0128] In the present disclosure, the terms cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable. In the present disclosure, the terms cell, PCI, cell with additional PCI, additional cell, other cell, non-serving cell, cell with a different PCI, candidate cell, candidate serving cell, cell with a PCI different from the PCI of the current serving cell, another serving cell, and target cell may be interchangeable. A target cell may be a cell selected from multiple candidate cells. In the present disclosure, the terms switch, change, and update may be interchangeable. A serving cell may be interchangeable with a serving cell before a switch or a serving cell after a switch.

[0129] In the present disclosure, transmission and reception may be read interchangeably.

[0130] In this disclosure, terms such as table, mapping, association, list, format, content, report, etc. may be read interchangeably.

[0131] In the present disclosure, MAC CE, UCI, cell switch command, beam switch command, beam report MAC CE, and cell switch MAC CE may be read interchangeably.

[0132] In the present disclosure, the UEIBR may be reported on a PUSCH (e.g., a CG PUSCH / DG PUSCH). That is, the report content in the present disclosure may be transmitted using at least one of a MAC CE / UCI / PUCCH / PUSCH.

[0133] In the present disclosure, serving may be interchangeably read as serving beam / serving cell / SpCell.

[0134] In the present disclosure, neighbor may be interchangeably read as a beam / cell other than the serving beam / serving cell / SpCell / SCell.

[0135] In the present disclosure, candidate cells, target cells, neighboring cells, cells, etc. may be read interchangeably.

[0136] In the present disclosure, beam, RS, RS index (CRI / SSBRI), and [L1 / L3] measurement results may be interpreted interchangeably.

[0137] In this disclosure, the RS to be measured may be a QCL source RS in an active TCI state / indicated TCI state.

[0138] In the present disclosure, [for Rel. 19] event-based beam reporting, event-triggered beam reporting, UE-triggered beam reporting, UE-initiated beam reporting (UEIBR), UE-initiated beam management (UEIBM), beam reporting, etc. may be read interchangeably.

[0139] In the present disclosure, the terms indicated TCI state, active TCI state, activated TCI state, configured TCI state, and RS configured in RRC may be read interchangeably.

[0140] Each embodiment of the present disclosure can be applied to any event.

[0141] In the present disclosure, the terms rule, case, factor, condition, threshold, etc. may be read interchangeably.

[0142] In this disclosure, the CSI / UCI for the UEIBR may be referred to as UEIBR-CSI / UCI. In this disclosure, [other] UCI (or simply "UCI") may mean UCI other than the CSI / UCI for the UEIBR.

[0143] In the present disclosure, beam report, CSI report, UEIBR, CSI related to UEIBR, UEIBR-CSI, UEIBR-UCI, report, etc. may be read interchangeably.

[0144] In the present disclosure, Mode A and Mode B may be interpreted as interchangeable.

[0145] In the present disclosure, multiplexing (multiplexing / being multiplexed) and mapping (mapping / being mapped) may be read interchangeably.

[0146] In the present disclosure, the UL channel that transmits UEIBR-CSI, CG PUSCH, Type 1 CG PUSCH, Type 2 CG PUSCH, DG PUSCH, and PUSCH may be interchangeable.

[0147] In the present disclosure, other UL channels (carrying other UCI), PUCCH, and PUSCH may be read as interchangeable.

[0148] In the present disclosure, beam instruction (DCI / MAC CE), TCI state instruction (DCI / MAC CE), TCI state switching command (DCI / MAC CE), cell switch command (DCI / MAC CE), DCI, MAC CE, etc. may be read as interchangeable.

[0149] In the present disclosure, report content, content, field, ID, measurement result, and report amount may be read interchangeably.

[0150] In the present disclosure, beam report, report, MAC CE, beam report MAC CE, UCI, and PUSCH may be read interchangeably.

[0151] In the present disclosure, beam, beam ID, beam identifier, RS index, SSBRI, and CRI may be read interchangeably.

[0152] In the present disclosure, the current beam, the beam / RS corresponding to the current active TCI state, the beam / RS corresponding to the active TCI state, the beam / RS derived from the [current] active TCI state, etc. may be read interchangeably.

[0153] In the present disclosure, beam and beam ID, RS and RS ID, TCI state and TCI state ID may be read interchangeably.

[0154] In this disclosure, "all" may mean "all configured for the UE."

[0155] In the present disclosure, conditional LTM and event-triggered [beam] reporting (UEIBR) may be read interchangeably.

[0156] (Wireless communication method) The UE may apply each embodiment of the present disclosure when performing beam measurement / reporting (e.g., UE IBR). The NW / BS / gNB may provide / send to the UE settings / instructions, etc., for the UE to perform the operations / controls described in each embodiment of the present disclosure. Furthermore, the NW / BS / gNB may perform various operations / controls required to receive an event-triggered beam report / UE IBR from the UE.

[0157] This disclosure is applicable to mobility / MIMO use cases.

[0158] In the present disclosure, each operation / option may be applied alone or in combination.

[0159] In the present disclosure, each operation / option may be applied in at least one of Case 1 and Case 2 described above.

[0160] In the present disclosure, each operation / option may be applied in at least one of Mode A and Mode B described above.

[0161] In the present disclosure, the number of RS / beam reports [included in a beam report] may include the number of sets of RS indices (e.g., CRI / SSBRI) and corresponding measurement results (e.g., L1-RSRP) included in the beam report, or may include the number of either RS ​​indices or corresponding measurement results.

[0162] In the present disclosure, "a beam is included in the report" may mean that information about the beam (e.g., information about at least one of an RS ID corresponding to the beam and a measurement result of the RS) is included in the report. In the present disclosure, the number of reported beams may be the same as the number of CRI / SSBRI fields included in one report.

[0163] In the following, this disclosure will be described using event 7 as a specific event, but this is merely an example and can be applied to other events as appropriate.

[0164] For example, Event 7 in the embodiment of the present disclosure may be interpreted as another event for MIMO or as an event for mobility (for example, for LTM / conditional LTM). In other words, the operation / regulation according to the embodiment of the present disclosure can be applied to events other than Event 7 as appropriate.

[0165] In this case, the beam report transmitted by the UE may be UCI-based or MAC CE-based. Therefore, the above-described operations / regulations may be applied to the beam report using UCI or the beam report using MAC CE. For example, the beam report may be transmitted with UCI / MAC CE for a UL cell switch command.

[0166] Also in this case, in step 2 of Mode A, the UE may receive a DCI to trigger / schedule UL channels / resources for the UCI of the UL Cell Switch Command.

[0167] In this case, the UE may also receive a conditional LTM configuration as a reporting configuration for the UE IBR. The UE may control the UE IBR operation based on the conditional LTM configuration.

[0168] The UE / NW may switch the application of different event types (e.g., events 2 and 7) using higher layer signaling (or at higher layers) or under specific conditions.

[0169] The NW may activate / deactivate the SP-CSI-RS for the UE in units of at least one of the following: · Per NZP-CSI-RS resource. For each NZP-CSI-RS resource(s) associated with the same candidate cell in one NZP-CSI-RS resource set. · Per NZP-CSI-RS resource set. ·By LTM CSI Resource Config ID (LTM-CSI-Resource-Config-ID).

[0170] The NW may separately activate / deactivate the SP-CSI-RS for L1-RSRP measurement and CSI acquisition based on the similarity (e.g., difference) of the configuration of the CSI-RS resource set to be measured.

[0171] First Embodiment The first embodiment relates to a new MAC CE for activating / deactivating SP-CSI-RS.

[0172] The UE may be instructed using the MAC CE to activate / deactivate the SP-CSI-RS for L1-RSRP measurement and the SP-CSI-RS for CSI acquisition separately.

[0173] The UE may receive a MAC CE instructing it to activate / deactivate the SP-CSI-RS for L1-RSRP measurement and / or to activate / deactivate the SP-CSI-RS for CSI acquisition.

[0174] The MAC CE may be, for example, a MAC CE that extends an existing MAC CE (for example, a MAC CE for activating / deactivating SP-CSI-RS), or may be a new MAC CE specified in Rel. 19 or later.

[0175] 3 is a diagram illustrating an example of activation / deactivation of an SP-CSI-RS for L1-RSRP measurement / CSI acquisition according to the first embodiment. In the example illustrated in FIG. 3, a UE receives a MAC CE from a network, instructing activation / deactivation of an SP-CSI-RS for L1-RSRP measurement / CSI acquisition. Then, the UE controls activation / deactivation of resources related to the SP-CSI-RS based on the MAC CE.

[0176] <<Option 1-1>> Two MAC CEs may be introduced / used.

[0177] For example, a MAC CE for activating / deactivating the SP-CSI-RS for L1-RSRP measurement and a MAC CE for activating / deactivating the SP-CSI-RS for CSI acquisition may be defined / used.

[0178] <<Option 1-2>> One MAC CE may be deployed / used.

[0179] For example, one MAC CE may be defined / used to activate / deactivate the SP-CSI-RS for L1-RSRP measurement and to activate / deactivate the SP-CSI-RS for CSI acquisition.

[0180] In this case, the one MAC CE may include a field (which may be, for example, 1 bit) indicating the purpose of use of the MAC CE (for example, L1-RSRP measurement or CSI acquisition).

[0181] In Option 1-1 / 1-2, at least one of the following fields may be included in the MAC CE: · Candidate cell ID(s). NZP-CSI-RS resource set ID(s). NZP-CSI-RS resource ID(s). LTM-CSI resource configuration ID (e.g., LTM-CSIResourceConfigID). LTM-CSI reporting configuration ID (e.g., LTM-CSIReportConfigID). · TCI State ID(s). An instruction to either activate or deactivate the SP-CSI-RS.

[0182] By including at least one of the above fields in the MAC CE, activation / deactivation of the SP-CSI-RS can be performed at different granularities.

[0183] For the multiple candidate cell IDs, the MAC CE may include a field for the multiple candidate cell IDs, or the multiple candidate cell IDs may be indicated using a bitmap for one field in the MAC CE.

[0184] Regarding a request for transmission of SP-CSI-RS with different granularity, a signal based on the different granularity may be transmitted from the source gNB to the candidate gNB.

[0185] As described above, according to the first embodiment, it is possible to appropriately define a new MAC CE for activating / deactivating an SP-CSI-RS.

[0186] <Second embodiment> The second embodiment relates to UE behavior regarding new MAC CE for activation / deactivation of SP-CSI-RS.

[0187] In this embodiment, the MAC CE may be the MAC CE according to the first embodiment, or may be a MAC CE different from the MAC CE according to the first embodiment.

[0188] The UE may assume / expect multiple (e.g., all) SP-CSI-RS resources associated with one or more particular IDs contained within the MAC CE to be activated / deactivated.

[0189] The particular ID may be, for example, one or more IDs contained in the MAC CE described in the first embodiment above.

[0190] The UE / NW may follow at least one of the following cases 2-1 to 2-6 for the one or more specific IDs. Note that cases 2-1 to 2-6 are merely examples, and examples of the one or more specific IDs are not limited to these.

[0191] <<Case 2-1>> Within the MAC CE, one or more candidate cell IDs may be included.

[0192] The UE may assume / expect multiple (e.g., all) SP-CSI-RS resources associated with the candidate cell with that candidate cell ID to be activated / deactivated.

[0193] <<Case 2-2>> An LTM-CSI resource configuration ID (eg, LTM-CSIResourceConfigID) / LTM-CSI reporting configuration ID (eg, LTM-CSIReportConfigID) may be included in the MAC CE.

[0194] The candidate cell ID may not be included in the MAC CE.

[0195] The UE may assume / expect that multiple (e.g., all) SP-CSI-RS resources associated with the LTM-CSI resource configuration ID / LTM-CSI reporting configuration ID (regardless of whether the SP-CSI-RS are associated with different candidate cells) will be activated / deactivated.

[0196] <<Case 2-3>> One or more candidate cell IDs and an LTM-CSI resource configuration ID (eg, LTM-CSIResourceConfigID) / LTM-CSI reporting configuration ID (eg, LTM-CSIReportConfigID) may be included in the MAC CE.

[0197] The UE may assume / expect that multiple (e.g., all) SP-CSI-RS resources associated with both the candidate cell with the candidate cell ID and the LTM-CSI resource configuration ID / LTM-CSI reporting configuration ID will be activated / deactivated.

[0198] <<Case 2-4>> One or more candidate cell IDs and one or more NZP-CSI-RS resource set IDs may be included in the MAC CE.

[0199] The UE may assume / expect that multiple (e.g., all) SP-CSI-RS resources associated with both the candidate cell with the candidate cell ID and the NZP-CSI-RS resource set ID will be activated / deactivated.

[0200] <<Case 2-5>> One or more candidate cell IDs and one or more NZP-CSI-RS resource IDs may be included within the MAC CE.

[0201] The UE may assume / expect that multiple (e.g., all) SP-CSI-RS resources associated with both the candidate cell with the candidate cell ID and the NZP-CSI-RS resource ID will be activated / deactivated.

[0202] <<Case 2-6>> Within the MAC CE, one or more candidate cell IDs and one or more TCI state IDs may be included.

[0203] The UE may assume / expect that multiple (e.g., all) SP-CSI-RS resources associated with both the candidate cell with the candidate cell ID and the TCI state ID will be activated / deactivated.

[0204] In this case, the QCL source RS of the TCI state with the TCI state ID may be a CSI-RS, and the CSI-RS may be an SP-CSI-RS in one of the LTM-CSI resource configurations.

[0205] In the above cases 2-1 to 2-5, one or more TCI state IDs may further be included in the MAC CE.

[0206] In the above cases 2-1 to 2-6, an indication field indicating whether to activate or deactivate the SP-CSI-RS may be included in the MAC CE.

[0207] In the above cases 2-1 to 2-6, the UE may refer to either the NZP-CSI-RS resource (set) under the LTM candidate configuration (e.g., LTM-candidate) or the LTM-CSI resource configuration under the LTM configuration for the SP-CSI-RS resource (set).

[0208] According to the second embodiment described above, it is possible to appropriately define UE operations related to a new MAC CE for activating / deactivating SP-CSI-RS.

[0209] <Supplementary Note> <<Notification of Information to UE / BS>> In the above-described embodiments, the notification of any information from [Network (NW) (e.g., Base Station (BS)) / NW node] to UE / BS (or, in other words, the reception of any information from BS / NW node at UE / BS) may be performed using physical layer signaling (e.g., DCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.

[0210] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new logical channel ID (LCID) not defined in the existing standard in the MAC sub-header.

[0211] When the above notification is performed by DCI, the above notification may be performed by a specific field of the DCI, a radio network temporary identifier (RNTI) used for scrambling cyclic redundancy check (CRC) bits assigned to the DCI, the format of the DCI, etc.

[0212] Also, the notification of any information to UE / BS in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically. The semi-persistent or aperiodic information notification may be triggered by an instruction from UE / BS / NW.

[0213] In the above-described embodiments, the information from NW may be set / instructed by any one or a combination of the following methods: · Common to multiple UEs or individual to each UE (per UE). · Common to multiple BSs or individual to each BS (per BS). · Common to multiple frequencies (e.g., one or a combination of cells, bands, band combinations, Bandwidth Parts (BWP), component carriers, etc.) (e.g., cell common) or specific to a frequency (per frequency, e.g., per cell).

[0214] <<Notification of Information from UE / BS>> The notification of any information from UE / BS to [NW] in the above embodiments (in other words, the transmission / reporting of any information from UE / BS to BS / NW nodes) may be performed using physical layer signaling (e.g., UCI), upper layer signaling (e.g., RRC signaling, MAC CE, NAS signaling, LPP message, NRPPa message), specific signals / channels (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.

[0215] When the above notification is performed by MAC CE, the MAC CE may be identified by including a new LCID not defined in existing standards in the MAC subheader.

[0216] When the above notification is performed by UCI, the above notification may be transmitted using PUCCH or PUSCH.

[0217] Also, the notification of any information from UE / BS in the above embodiments may be performed periodically, semi-persistently, or aperiodically. The semi-persistent or aperiodic information notification may be triggered by an instruction from UE / BS / NW.

[0218] <<Regarding the Application of Each Embodiment>> In UE / BS, specific (e.g., one or more, or some) processing / operations / controls / assumptions / information for at least one of the above embodiments may be applied (used) when any one or a plurality of the following conditions are met: · Upper layer parameters indicating the above specific processing / operation / control / assumment / information are set in the UE / BS. The specific processing / action / control / assumption / information is determined in the UE / BS based on the relevant higher layer parameters. The above specific processing / action / control / assumption / information is specified / activated / triggered for the UE / BS by the MAC CE / DCI / UCI / resource / channel / RS. The UE / BS reports or supports specific capabilities (e.g., UE capabilities) that indicate (or relate to) the specific processing / action / control / assumption / information. The application of the above specific processing / operation / control / assumption / information is determined in the UE / BS based on specific conditions.

[0219] The specified capabilities may indicate at least one of the following: · To support the above specific processes / actions / controls / assumptions / information. Support UEIBR. · Support LTM. Support MAC CE for activating / deactivating SP-CSI-RS for L1-RSRP measurement / CSI acquisition. ·Specific ID included in MAC CE for activating / deactivating SP-CSI-RS for L1-RSRP measurement / CSI acquisition.

[0220] In the present disclosure, "supporting" and "whether to support" may be read interchangeably.

[0221] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC).

[0222] Furthermore, the above-mentioned specific capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (for example, Time Division Duplex (TDD) or Frequency Division Duplex (FDD)).

[0223] If the above conditions are not met, the UE / BS may follow the behavior specified in existing 3GPP releases.

[0224] Information on whether one or more of the above embodiments / options / choices / examples apply / are used, or which of the above embodiments / options / choices / examples apply / are used, may be based on several of the following methods: The information is configured by one or more higher layer parameters / RRC IEs. The information is determined by one or more relevant higher layer parameters / RRC IEs. The information is directed by the MAC CE / DCI. The information is based on one or more UE capabilities. The information is described / defined in the specification. The information is based on the conditions described / defined in the specification. The information is determined by a combination of several pieces of information above. For example, the information is determined by higher layer parameters / MAC CE / DCI settings / indications and reported by UE capabilities.

[0225] The above embodiments / options / choices may be combined into one embodiment / option / choice.

[0226] (Addendum) The following inventions are added regarding one embodiment of the present disclosure. [Appendix 1] 1. A terminal comprising: a receiver that receives a Medium Access Control (MAC) control element that instructs at least one of activating or deactivating a semi-persistent channel state information reference signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating an SP-CSI-RS for CSI acquisition; and a controller that controls at least one of activating or deactivating the SP-CSI-RS for L1-RSRP measurement and activating or deactivating the SP-CSI-RS for CSI acquisition, based on the MAC control element. [Appendix 2] 2. The terminal according to claim 1, wherein the receiving unit separately receives a MAC control element instructing activation or deactivation of an SP-CSI-RS for the L1-RSRP measurement and a MAC control element instructing activation or deactivation of an SP-CSI-RS for the CSI acquisition. [Appendix 3] 3. The terminal of claim 1, wherein the MAC Control element includes a field indicating whether the MAC Control element instructs activation or deactivation of an SP-CSI-RS for the L1-RSRP measurement or activation or deactivation of an SP-CSI-RS for the CSI acquisition. [Appendix 4] 4. The terminal according to any one of Supplementary Note 1 to Supplementary Note 3, wherein the controller assumes that a plurality of SP-CSI-RS resources associated with one or more specific IDs included in the MAC Control element are activated or deactivated.

[0227] (wireless communication system) The 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 thereof.

[0228] 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present disclosure. The wireless communication system 1 (which may be simply referred to as 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).

[0229] The wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0230] 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.

[0231] The wireless communication system 1 may support dual connectivity between multiple base stations within 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))).

[0232] 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 within the macrocell C1 and form small cells C2 that are smaller than the macrocell C1. A terminal 20 may be located within at least one of the cells. The arrangement, number, shape, size, etc. of each cell and 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 base station 10.

[0233] The wireless communication system 1 may utilize Multi Input Multi Output (MIMO). For example, one cell may be formed by one antenna / base station 10, or may be formed by multiple antennas / base stations 10. One [virtual] cell (which may be called, for example, a super cell) may be composed of multiple [virtual] cells (which may be called, for example, sub-cells). A super cell may correspond to a cell whose physical range is fixed, and a sub-cell may correspond to a cell whose physical range varies semi-statically / dynamically. In this case, the wireless communication system 1 may be called a cell-free system.

[0234] The terminal 20 may be connected to at least one of the multiple base stations 10. The terminal 20 may use at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0235] 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 be a frequency band higher than FR2.

[0236] Furthermore, the terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

[0237] The multiple base stations 10 may be connected by wire (for example, optical fiber conforming to the Common Public Radio Interface (CPRI), an X2 / Xn interface, etc.) or wirelessly (for example, 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.

[0238] 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, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN, 5GC), a Next Generation Core (NGC), and the like.

[0239] The core network 30 may include network functions (Network Functions (NFs)) such as a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM). Note that a single network node (which may simply be referred to as a node) may provide multiple functions. Furthermore, communication with an external network (e.g., the Internet) may be performed via the DN.

[0240] The terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0241] An Orthogonal Frequency Division Multiplexing (OFDM)-based radio access scheme may be used in the radio communication system 1. For example, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used in at least one of the downlink (DL) and uplink (UL).

[0242] The radio access scheme may also be called a waveform. Note that 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.

[0243] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.

[0244] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each 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.

[0245] The PDSCH transmits user data, higher layer control information, System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit Master Information Block (MIB).

[0246] 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 for at least one of the PDSCH and the PUSCH.

[0247] Note that the DCI for scheduling the PDSCH may be referred to as a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be referred to as an UL grant, a UL DCI, etc. Note that the PDSCH may be interpreted as DL data, and the PUSCH may be interpreted as UL data.

[0248] 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 more search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0249] 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," "CORESET setting," etc. in the present disclosure may be read interchangeably.

[0250] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0251] In the present disclosure, downlink, uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning.

[0252] 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, 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 as DL-RS.

[0253] 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 DMRS for the PBCH) may be referred to as an SS / PBCH block, an SS Block (SSB), or the like. Note that the SS, SSB, and the like may also be referred to as reference signals.

[0254] 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 also be called a user equipment-specific reference signal (UE-specific reference signal).

[0255] (base station) 5 is a diagram illustrating an example of the configuration of a base station according to an embodiment of the present disclosure. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the base station may include one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140.

[0256] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0257] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured from 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.

[0258] 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 transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data to be transmitted as signals, control information, sequences, etc., and transfer them to the transceiver unit 120. The control unit 110 may perform call processing (setting up, releasing, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0259] 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.

[0260] The transmitting / receiving unit 120 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 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0261] The transmitting and receiving antenna 130 can be configured from an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0262] 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.

[0263] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0264] 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.

[0265] The transceiver 120 (transmission processor 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.

[0266] The transmitting / receiving unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna .

[0267] On the other hand, the transmitting / receiving unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna .

[0268] 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.

[0269] 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.

[0270] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NFs), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the terminal 20.

[0271] 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.

[0272] The base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU). For example, the RU may perform RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level functions of the physical layer (precoding, IFFT, FFT, etc.). The DU may perform higher-level functions of the physical layer (coding to resource element mapping, etc.), MAC layer functions, and RLC layer functions. The CU may perform PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.

[0273] In the present disclosure, the base station 10 may include a single device that implements all of the functions of the RU, DU, and CU, or may include multiple devices that each implement some of the functions of the RU, DU, and CU and are connected to each other. In the present disclosure, the base station 10 may be interchangeably read as RU / DU / CU.

[0274] The transceiver 120 may transmit a Medium Access Control (MAC) control element instructing at least one of activating or deactivating a semi-persistent channel state information reference signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating an SP-CSI-RS for CSI acquisition. The controller 110 may use the MAC control element to instruct at least one of activating or deactivating the SP-CSI-RS for L1-RSRP measurement and activating or deactivating the SP-CSI-RS for CSI acquisition (first embodiment).

[0275] Furthermore, in the present disclosure, a network device (for example, an LMF node) having the functionality of any of the above-described NFs may be a device having the configuration (for example, the control unit 110 and the transceiver unit 120) of the base station 10 in the same manner as in Fig. 5. In other words, in the description of Fig. 5, by replacing the base station with the network device, the configuration of the network device according to an embodiment of the present disclosure may be covered.

[0276] (Terminal) 6 is a diagram illustrating an example of the configuration of a terminal according to an embodiment of the present disclosure. The terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the terminal may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0277] In this example, functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the terminal 20 also has other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.

[0278] The control unit 210 performs overall control of the terminal 20. The control unit 210 can be configured from 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.

[0279] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transceiver unit 220 and the transceiver antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.

[0280] The transceiver 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 transceiver unit 220 may be configured from 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.

[0281] 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.

[0282] The transmitting / receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0283] 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.

[0284] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), or the like.

[0285] The transceiver 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.

[0286] The transceiver 220 (transmission processor 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 string to be transmitted, and output a baseband signal.

[0287] Whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, the transceiver unit 220 may not perform DFT processing as the transmission processing.

[0288] The transmitting / receiving unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, etc. on the baseband signal, and transmit the radio frequency band signal via the transmitting / receiving antenna 230.

[0289] On the other hand, the transmitting / receiving unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting / receiving antenna 230.

[0290] 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 to acquire user data, etc.

[0291] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, 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.

[0292] The measurement unit 223 may derive channel measurements for CSI calculation based on the channel measurement resources. The channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources. The measurement unit 223 may also derive interference measurements for CSI calculation based on the interference measurement resources. The interference measurement resources may be at least one of an NZP CSI-RS resource for interference measurement, a CSI-Interference Measurement (IM) resource, etc. Note that CSI-IM may be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS. Note that in the present disclosure, CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeably read as interchangeable.

[0293] The transmitting section and receiving section of the 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.

[0294] The transceiver 220 may receive a Medium Access Control (MAC) control element instructing at least one of activating or deactivating a semi-persistent channel state information reference signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating an SP-CSI-RS for CSI acquisition. The controller 210 may control at least one of activating or deactivating the SP-CSI-RS for L1-RSRP measurement and activating or deactivating the SP-CSI-RS for CSI acquisition based on the MAC control element (first embodiment).

[0295] The transceiver 220 may separately receive a MAC control element instructing activation or deactivation of the SP-CSI-RS for the L1-RSRP measurement and a MAC control element instructing activation or deactivation of the SP-CSI-RS for the CSI acquisition (first embodiment).

[0296] The MAC Control element may include a field indicating whether the MAC Control element instructs activation or deactivation of an SP-CSI-RS for the L1-RSRP measurement or activation or deactivation of an SP-CSI-RS for the CSI acquisition (first embodiment).

[0297] The control unit 210 may assume that multiple SP-CSI-RS resources associated with one or more specific IDs included in the MAC Control element are to be activated or deactivated (second embodiment).

[0298] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by hardware, software, or a combination of these. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using a single device that is physically or logically coupled, or may be realized by using two or more physically or logically separated devices that are connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may also be realized by combining the single device or the multiple devices with software.

[0299] For example, a base station, a terminal, a network node, etc. according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 7 is a diagram illustrating an example of the hardware configuration of a base station and a terminal according to an embodiment of the present disclosure. The above-described base station 10 and 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.

[0300] In the present disclosure, any two terms selected from a set of terms such as apparatus, circuit, device, section, unit, module, chip, means, etc. may be read as interchangeable. The hardware configurations of the base station 10 and the 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.

[0301] Each function in the base station 10 and the terminal 20 is realized, for example, by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002, causing the processor 1001 to perform calculations, control communication via the communication device 1004, and control the reading, writing, or both reading and writing of data in the memory 1002 and the storage 1003.

[0302] The processor 1001, for example, runs an operating system to control the entire computer. The processor 1001 may be configured as 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), transceiver unit 120 (220), etc. may be realized by the processor 1001. Although only one processor 1001 is shown in the figure, there may be multiple processors.

[0303] The processor 1001 also reads programs (program codes), software modules, data, etc. from the storage 1003, the communication device 1004, or both the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these. The programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and the other functional blocks may be realized in a similar manner.

[0304] The various processes described above may be performed by one processor 1001, or may be performed by two or more processors 1001 simultaneously, sequentially, or using other techniques. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunications line, or may be provided to the computer device via, for example, the communication device 1004.

[0305] The present disclosure also provides a computer program product including a computer program, which may implement the steps of the methods described in the above embodiments when the computer program is executed by a computer (e.g., the processor 1001).

[0306] The memory 1002 is a non-transitory computer-readable recording medium and may be configured, for example, by a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically EEPROM (EEPROM), a random access memory (RAM), or a combination of at least two of these. The memory 1002 may also be referred to as a register, a cache, a main memory, or the like. The memory 1002 may store executable programs (program codes), software modules, and the like for implementing a wireless communication method according to one embodiment of the present disclosure.

[0307] Storage 1003 is a non-transitory computer-readable recording medium, and may be, for example, a flexible disk, a floppy disk, an optical disk (e.g., a compact disc (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a magneto-optical disk, a removable disk, a hard disk drive, a smart card, a flash memory (e.g., a card, stick, key drive), a magnetic stripe, or the like, or a combination of at least two of these. Storage 1003 may also be referred to as a secondary storage device.

[0308] The above-mentioned recording medium may be, for example, the memory 1002, the storage 1003, or a database including both the memory 1002 and the storage 1003, a server, or other suitable medium.

[0309] The communication device 1004 is hardware (transmission / reception device) for communicating between computers via a wired network, a wireless network, or both 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, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., or a combination of at least two of these. 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.

[0310] The input device 1005 is an input device that accepts input from the outside (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc., or a combination of at least two of these). The output device 1006 is an output device that performs output to the outside (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc., or a combination of at least two of these). Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0311] Furthermore, 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.

[0312] Furthermore, base station 10 and 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), a graphics processing unit (GPU), a neural processing unit (NPU), or a combination of at least two of these, and some or all of the functional blocks may be realized using such hardware. For example, processor 1001 may be implemented using at least one of these hardware elements.

[0313] In this disclosure, the term "processor" may encompass a single processor or a group of multiple processors, including, for example, a single-core processor, a multi-core processor, multiple processors in a single device, multiple processors in wired or wireless communication with each other, etc. Similarly, the term "(non-transitory) computer-readable storage medium" may encompass a single storage medium or a group of multiple storage media, including multiple storage media in wired or wireless communication with each other.

[0314] Devices such as processors and storage media in the present disclosure may be distributed locally or remotely, and may perform the processing of the devices by operating cooperatively or independently using a bus, network, the Internet, the cloud, etc.

[0315] Note that the devices included in the core network 30 (for example, network nodes that provide NFs) may also be realized by the above-described functional block / hardware configuration.

[0316] (Variation) Each aspect / embodiment described in the present disclosure may be a mobile communication system other than Long Term Evolution (LTE), LTE-Advanced (LTE-A), International Mobile Telecommunications-Advanced (IMT-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G-Advanced (5G-A), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal number)), Future Radio Access (FRA), New Radio (NR), New radio access (NX), Future generation radio access (FX), Open Radio Access Network (Open RAN (O-RAN)), Wideband Code Division Multiple Access (W-CDMA (registered trademark)), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.11x (where x is any character string such as b, a, g, n, ac, ax, be, or bn, and when x = n, it is called Wi-Fi 4, when x = ac, it is called Wi-Fi 5, when x = ax, it is called Wi-Fi 6 or Wi-Fi 6E, when x = be, it is called Wi-Fi 7, and when x = bn, it is called Wi-Fi 8.Note that the present disclosure may be applied to systems based on technologies such as Wi-Fi (a registered trademark), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), network virtualization technologies (e.g., Network Function Virtualization (NFV), Service Function Chaining (SFC), Software Defined Networking (SDN)), or Low Power Wide Area (LPWA). Furthermore, each aspect / embodiment described in the present disclosure may be applied to a system based on a combination of at least two of these technologies. Here, "based on" naturally refers not only to a system that uses the technology in question, but also to a system that uses an extension or modification of the technology.

[0317] In the present disclosure, any two terms selected from a set of terms such as "Base Station (BS)", "Radio Base Station", "Fixed Station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "Access Point (AP)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "Radio Unit (RU)", "Remote Unit (RU)", "Control Unit (CU)", "Distributed Unit (DU)", "Remote Radio Head (RRH)", "node", "gateway", "terrestrial base station", "stratospheric base station", "unmanned aerial vehicle", "High Altitude Platform Station (HAPS)", "airborne platform", "panel", "cell", "Radio Access Network (RAN)", "network", etc. may be used interchangeably. Each cell accommodated by a base station may be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, a serving cell, a super cell, etc. In the present disclosure, any two terms selected from a set of terms such as "cell," "sector," "cell group," "carrier," "component carrier," "cluster," "bandwidth part (BWP)," and "carrier bandwidth" may be used interchangeably.

[0318] In the present disclosure, any two terms selected from the set of terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "Device", "Module", "Terminal", etc. may be used interchangeably.

[0319] A terminal may 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, router (e.g., home router, mobile router, etc.), Telematics Control Unit (TCU), or some other suitable terminology.

[0320] The base station and the terminal may each be composed of one or more devices. The devices constituting at least a part of the base station and the terminal may be called a transmitting device, a receiving device, a [wireless] communication device, etc. In addition, the devices constituting at least a portion of each of the base stations and terminals may be objects themselves, such as vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcars, rickshaws, ships and other watercraft, airplanes, rockets, unmanned aerial vehicles, stratospheric base stations (e.g., High Altitude Platform Stations (HAPS)), artificial satellites (e.g., Low Earth Orbit (LEO) satellites, Middle Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites), drones (registered trademark), multicopters, quadcopters, balloons, Internet of Things (IoT) equipment (e.g., smart meters, sensors), etc., or may include, but are not limited to, objects or devices mounted on such objects. Furthermore, the object may be a moving object (hereinafter referred to as a "moving object"; this does not exclude the case where the moving object is stationary and not moving), or may be a fixedly positioned object (hereinafter referred to as a "non-moving object").

[0321] Furthermore, a base station in the present disclosure may be read as a terminal. For example, the aspects / embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)) or communication in a non-terrestrial network (Non-Terrestrial Network (NTN)). In this case, the 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 communication between terminals (for example, "sidelink") or terms corresponding to NTN (for example, feeder link, service link). For example, terms such as uplink channel and downlink channel may be read as sidelink channel.

[0322] The present disclosure is also applicable to cases where at least some of the devices constituting the base station and the terminal operate outside the earth (for example, in the atmosphere or outer space).

[0323] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station 10 may be configured to have the functions of the terminal 20 described above.

[0324] In the present disclosure, an operation described as being performed by a base station may be performed by its upper node or by some of its upper nodes (e.g., CU, RU, DU, etc.) in some cases. It is clear that various operations performed for communication with a terminal in a RAN or core network may be performed by at least some of the base station and other network nodes other than the base station. The other network node may be one node or a combination of multiple nodes. The network node is, for example, a node provided in various core networks such as an Evolved Packet Core (EPC) or a 5G Core Network (5GCN, 5GC), and provides one or more network functions (Network Functions (NFs)), but is not limited to these.

[0325] Furthermore, in the present disclosure, the operation of "a terminal receives information from a base station" accompanies the operation of "the base station transmits the information to the terminal," "the base station generates the information," or both. Similarly, the operation of "a terminal transmits information to a base station" accompanies the operation of "the base station receives the information from the terminal." Furthermore, operations such as "a terminal is configured to ..." or "configure UE to ..." may include the operation of "a base station transmits configuration information regarding the configuration of the terminal" or "a terminal configures a predetermined operation based on the configuration information."

[0326] 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 of at least two of them.

[0327] The physical layer signaling may be referred to as Layer 1 (L1) control information. The MAC signaling may be referred to as, for example, a MAC Control Element (CE) or a MAC Protocol Data Unit (PDU). The RRC signaling may be referred to as an RRC message or an information element (IE) in the RRC message. The RRC signaling may be, for example, a message used for controlling an RRC connection (e.g., setup, reconfiguration, establishment, reestablishment, release, or resume), mobility, a measurement report, notification of terminal capabilities, or an information element in the message.

[0328] Furthermore, notification of information may be either explicit or implicit. Note that an explicit notification of certain information means notification of the certain information itself, and an implicit notification of certain information may mean notification of information other than the certain information, or the certain information being deemed to have been notified when a certain condition is met.

[0329] Furthermore, notification of information may include not only notification between the same layers of different devices (for example, between a lower layer or an upper layer of the base station 10 and the terminal 20) but also notification between different layers in the same or different devices (for example, between a lower layer and an upper layer in the base station 10 or the terminal 20). Furthermore, notification of information from one device to another device may be performed via one or more devices.

[0330] With respect to any information (e.g., variables, constants, parameters, settings) described in the present disclosure, even if not specifically stated in the above embodiments, any first device (e.g., terminal / base station) may notify any second device (e.g., base station / terminal) of information indicating / identifying (or relating to) the value of the any information.

[0331] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, the order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure may be changed as long as it is consistent. For example, the methods described in this disclosure present various step elements using an exemplary order and are not limited to the particular order presented. Furthermore, at least one step may be omitted in the procedures, sequences, flowcharts, etc. of each aspect / embodiment described in this disclosure.

[0332] As used in this disclosure, any reference to an element using a designation such as "first," "second," etc. 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 in some way precede the second element.

[0333] In the present disclosure, a radio resource may be defined by a combination of resource units in one or more domains, such as the time domain, the frequency domain, the spatial domain, the code domain, and the power domain.

[0334] For example, a resource in the time domain (which may be referred to as a time resource) may be defined by one or more time units. The one or more time units may include, but are not limited to, a radio frame, a subframe, a slot, a symbol, a transmission time interval (TTI), or a combination of at least two of these. Furthermore, the time unit may be a fixed-length time unit that is independent of numerology, a variable-length time unit that is dependent on numerology, or both.

[0335] Examples of fixed-length time units include, but are not limited to, subframes each consisting of one or more slots and radio frames each including multiple subframes. Examples of variable-length time units include, but are not limited to, symbols and slots each including a fixed number of symbols. A certain time unit may be divided into time units shorter than the certain time unit. Examples of such shorter time units include, but are not limited to, minislots each consisting of fewer symbols than the number of symbols that make up a slot. The above-described time units may include time units used as units for scheduling, link adaptation, and the like. Any time unit in the present disclosure may be interchangeable with another time unit.

[0336] Numerology is a parameter that defines the physical layer structure, and may be a parameter based on at least one of the subcarrier spacing (SCS), the symbol length, the cyclic prefix length, and the sampling time, for example.

[0337] A resource in the frequency domain (which may also be referred to as a frequency resource) may be defined by, for example, one or more frequency units. The one or more frequency units may include, for example, a subcarrier, a resource block (RB), a bandwidth part (BWP), a carrier bandwidth, or a combination of at least two of these, but the name of the frequency unit is not limited to these. Furthermore, the number of subcarriers included in a certain frequency unit may be a fixed number regardless of numerology, or may be a variable number that changes depending on numerology.

[0338] For example, an RB is composed of a predetermined number of consecutive subcarriers in the frequency domain, and the number of subcarriers included in the RB may be the same regardless of numerology, for example, 12, but is not limited to this. Also, a BWP may be composed of, for example, one or more consecutive RBs within a certain carrier bandwidth, but is not limited to this. One or more BWPs may be configured within one carrier for terminal 20, and at least one of the BWPs may be activated. Also, any frequency unit in the present disclosure may be interpreted as another frequency unit.

[0339] Furthermore, resources in both the time domain and the frequency domain may be defined by one or more time / frequency units each consisting of a time unit and a frequency unit, such as, but not limited to, a resource element (RE) consisting of one symbol and one subcarrier, a resource element group (REG) consisting of a predetermined number of REs, or a control resource set (CORESET) consisting of a predetermined number of symbols and a predetermined number of RBs.

[0340] The resources in the spatial domain (which may also be referred to as spatial resources) may be defined, for example, by one or more spatial units, including, but not limited to, beams, layers of Multi-Input Multi-Output (MIMO), antenna ports, etc., or a combination of at least two of them.

[0341] The resource in the code domain (which may also be referred to as a code resource) may be defined by, for example, one or more code units, including, but not limited to, a Cyclic Shift (CS), an Orthogonal Cover Code (OCC), or a combination thereof.

[0342] In this disclosure, where articles are 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.

[0343] In the present disclosure, terms such as "decide," "determine," "judge," "select," "specify," "compute," "calculate," "process," "derive," "look up / search / inquiry," "confirm," "assume," "expect," and "consider" may be read interchangeably. Also, in the present disclosure, performing a certain process (e.g., sending, receiving) may be read interchangeably as deciding to perform that process. Also, in the present disclosure, "not expected to do..." may be read interchangeably as "assumed not to do...."

[0344] In the present disclosure, "expect" may be interchangeably read as "be expected." For example, "expect(s) ..." ("..." may be expressed, for example, as a that clause, a to-infinitive, etc.) may be interchangeably read as "be expected ...," "do ... (if the above "..." is a to-infinitive, a verb with "to")," etc. "does not expect ..." may be interchangeably read as "be not expected ...," "does not ... (if the above "..." is a to-infinitive, a verb with "to")," etc. Furthermore, "An apparatus A is not expected ..." may be interchangeably read as "an apparatus B other than apparatus A does not expect ... from apparatus A" (for example, if apparatus A is a UE, apparatus B may be a base station).

[0345] In the present disclosure, terms such as "less than or equal to," "less than," "greater than," "more than," "equal to," etc. may be interchangeable. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative. Furthermore, in the present disclosure, terms meaning "good," "bad," "big," "small," "high," "low," "fast," "slow," "wide," "narrow," etc. may be interchangeable, not limited to the positive, comparative, and superlative, as expressions with the prefix "i-th" (i is any integer) (for example, "highest" may be interchangeable as "i-th highest").

[0346] In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be read interchangeably.

[0347] In the present disclosure, terms such as "when A, B," "if A, (then) B," "B upon A," "B in response to A," "B based on A," "B during / while A," "B before A," "B at (the same time as) / on A," "B after A," "B since A," and "B until A" may be interchangeable. Note that A, B, and the like herein may be replaced with appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context. Note that the time difference between A and B may be nearly zero (immediately after or immediately before). A time offset may be applied to the time at which A occurs. For example, "A" may be interchangeable with "before / after the time offset at which A occurs." The time offset (eg, one or more symbols / slots) may be predefined or may be specified by the UE based on signaled information.

[0348] In the present disclosure, timing, time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, resource, etc. may be read interchangeably.

[0349] 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 relation information," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "port," "layer," "number of layers," "rank," "resource," "resource set," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," "UE panel," "transmitting entity," "receiving entity," etc. may be used interchangeably.

[0350] In the present disclosure, an antenna port may be interchangeably read as an antenna port for any signal / channel (e.g., a Demodulation Reference Signal (DMRS) port). In the present disclosure, a resource may be interchangeably read as a resource for any signal / channel (e.g., a reference signal resource). Furthermore, the spatial domain filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.

[0351] In the present disclosure, beam, sounding reference signal (SRS) resource indicator (SRS Resource Indicator (SRI)), control resource set (CONTROLLER RESOLUTION SET (CORESET)), CORESET pool, uplink shared channel (Physical Downlink Shared Channel (PDSCH)), uplink shared channel (Physical Uplink Shared Channel (PUSCH)), codeword (CW), transport block (TB), reference signal (RS), etc. may be interpreted as interchangeable.

[0352] In the present disclosure, the terms TCI state, TCI, downlink TCI state (Downlink (DL) TCI state), uplink TCI state (Uplink (UL) TCI state), unified TCI state, common TCI state, joint TCI state, etc. may be read interchangeably.

[0353] Furthermore, in this disclosure, terms such as "QCL," "QCL assumptions," "QCL relationships," "QCL type information," "QCL properties," "specific QCL type (e.g., Type A, Type D) properties," and "specific QCL type (e.g., Type A, Type D)" may be interchangeable.

[0354] In this disclosure, terms such as index, identifier (ID), identity (ID), indicator, indication, resource ID, etc. may be interchangeable. In this disclosure, terms such as sequence, list, set, group, cluster, subset, etc. may be interchangeable.

[0355] In the present disclosure, a group may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, an RS group, a CORESET group, a Physical Uplink Control Channel (PUCCH) group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, and the like.

[0356] Information in this disclosure (e.g., variables, constants, parameters, settings) may be interchangeably read as the ID of the information. For example, TCI state and TCI state ID may be interchangeably read as the ID of the information. Also, information in this disclosure may be interchangeably read as "a set of the information," "one or more pieces of the information," etc.

[0357] Any signal / channel (e.g., PUCCH) in the present disclosure may be interchangeably read as another signal / channel (e.g., PUSCH, PDSCH, any RS). A signal / channel may be interchangeably read as a signal / channel for the same direction (e.g., UL if the certain signal / channel is in the UL direction, and DL if in the DL direction), or as a signal / channel for another direction (e.g., DL if the certain signal / channel is in the UL direction, and UL if in the DL direction). Also, in the present disclosure, descriptions related to DL communication and descriptions related to UL communication may be interchangeably read. In this case, DL (UL) operation may be interchangeably read as the corresponding UL (DL) operation. For example, reception of a PDSCH in a terminal may be interchangeably read as transmission of a PUSCH in the terminal.

[0358] In the present disclosure, terms such as "X's number," "X number," "the number of X(s)," and "a number of X(s)" may be interchangeable. Note that X here may be replaced with an appropriate expression such as a noun, a gerund, or an ordinary sentence, depending on the context. In the present disclosure, "number" may be interchangeable with terms such as maximum number, minimum number, average number, and total number. In addition, in the present disclosure, terms such as "value," "index," "number," and "quantity" may be interchangeable with each other.

[0359] Values / ranges in this disclosure may be interpreted as approximations, as if the words "about" or "approximately" were preceding the value / range. In this disclosure, "A and B are the same" (A and B are any words) may mean "A and B are identical," "A and B are almost the same," "A and B are partly the same (or partially overlapped)," "There is an error within a certain range between A and B," etc. (i.e., these words may be read interchangeably). Furthermore, in the present disclosure, A and B being the same may mean that at least part of A and at least part of B are the same (or overlapped).

[0360] In this disclosure, the terms "one embodiment," "some embodiments," "another embodiment," etc. may be used interchangeably. The appearances of phrases such as "one embodiment," "some embodiments," "another embodiment," etc. in this disclosure do not necessarily all refer to the same embodiment, nor are they necessarily meant to be mutually exclusive.

[0361] In the present disclosure, expressions such as "at least one of A and B," "at least one of A or B," "A and / or B," and "A / B" may be read interchangeably and may be understood to include "only A," "only B," or "both A and B." Furthermore, in the present disclosure, expressions such as "at least one of A, B, and C," "at least one of A, B, or C," "A, B and / or C," and "A / B / C" may be read interchangeably and may be understood to include "only A," "only B," "only C," "A and B," "B and C," "C and A," or "all of A, B, and C." Note that similar interpretations / readings can be applied to any expression in this disclosure such as "at least X of ..." (where the number of elements in "..." and X are each any number).

[0362] In the present disclosure, expressions such as "A, [and] B, and the like" / "such as A and B"," "A, [or] B, or the like" / "such as A or B"," "A, B, etc." / "A, B, and so on" / "A, B, and so forth"," and "A, B, [and / or] the others" may be read interchangeably.

[0363] In the present disclosure, expressions representing one / single X (e.g., "a X," "one X," "a single X"), expressions representing one or more X (e.g., "one or more X(s)," "at least one of X(s)"), and expressions representing a plurality of X (e.g., "Xs," "more than one X(s)," "multiple X(s)," "a plurarity of X(s)") may be read interchangeably. Note that these expressions may also be read interchangeably with expressions that include specific wording (e.g., when X is an uncountable noun, "pieces of," "amount of," etc.). For example, "a plurality of pieces of spatial relation information" may be read interchangeably as "a plurality of spatial relation information."

[0364] The present disclosure has been described above, but it is for illustrative purposes only, and the present invention is not limited to the aspects / embodiments described in the present disclosure. The present disclosure can be implemented in modified and altered forms without departing from the spirit of the invention. The present disclosure and its modifications and alterations are included in the scope of the present invention and its equivalents.

Claims

1. a receiver that receives a Medium Access Control (MAC) control element instructing at least one of activating or deactivating a Semi-Persistent Channel State Information Reference Signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating the SP-CSI-RS for CSI acquisition; A terminal having a control unit that controls at least one of activating or deactivating the SP-CSI-RS for the L1-RSRP measurement and activating or deactivating the SP-CSI-RS for the CSI acquisition based on the MAC control element.

2. The terminal according to claim 1, wherein the receiving unit separately receives a MAC control element that instructs activation or deactivation of the SP-CSI-RS for the L1-RSRP measurement and a MAC control element that instructs activation or deactivation of the SP-CSI-RS for the CSI acquisition.

3. 2. The terminal of claim 1, wherein the MAC control element includes a field indicating whether the MAC control element instructs activation or deactivation of an SP-CSI-RS for the L1-RSRP measurement or activation or deactivation of an SP-CSI-RS for the CSI acquisition.

4. The terminal according to claim 1 , wherein the control unit assumes that multiple SP-CSI-RS resources associated with one or more specific IDs included in the MAC control element are activated or deactivated.

5. receiving a Medium Access Control (MAC) control element instructing at least one of activating or deactivating a Semi-Persistent Channel State Information Reference Signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activating or deactivating a SP-CSI-RS for CSI acquisition; and controlling, based on the MAC control element, at least one of activating or deactivating an SP-CSI-RS for measuring the L1-RSRP and activating or deactivating an SP-CSI-RS for acquiring the CSI.

6. a transmitter configured to transmit a Medium Access Control (MAC) control element instructing at least one of activation or deactivation of a Semi-Persistent Channel State Information Reference Signal (SP-CSI-RS) for Layer 1-Reference Signal Received Power (L1-RSRP) measurement and activation or deactivation of the SP-CSI-RS for CSI acquisition; A base station having a control unit that uses the MAC control element to instruct at least one of activating or deactivating the SP-CSI-RS for measuring the L1-RSRP and activating or deactivating the SP-CSI-RS for acquiring the CSI.

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