Terminal, radio communication method, base station, and system

Abstract

To update a path loss reference signal against a plurality of cells at the same time.SOLUTION: A terminal according to an aspect of a present disclosure includes: a reception part that receives a list that updates a power control parameter for a path loss reference signal ID and an up-link transmission, and indicates a plurality of serving cells; and a control part that applies the path loss reference signal ID and the power control parameter that are designated by information to each of the plurality of serving cells of the list in the case where a MAC CE indicating the information related to the path loss reference signal ID and the power control parameter for the up-link transmission for one serving cell in the plurality of serving cells. The control part reports capability information indicating the fact that an application of a relation of the path loss reference signal ID and the power control parameter to each of the plurality of serving cells is supported.SELECTED DRAWING: Figure 7

Description

[Technical field]

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

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

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

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

[0005] In future wireless communication systems (e.g., NR), it is being considered that a user terminal (terminal, user terminal, User Equipment (UE)) will estimate path loss based on a path loss reference signal (PL-RS) and control transmission processing of uplink (UL) transmission (UL channel / UL signal) based on the path loss.

[0006] However, updating the PL-RS for each serving cell / bandwidth part (BWP) may increase overhead / latency and reduce throughput.

[0007] Therefore, an object of the present disclosure is to provide a terminal, a wireless communication method, a base station, and a system that appropriately update the PL-RS. [Means for solving the problem]

[0008] A terminal according to one embodiment of the present disclosure includes a receiving unit that receives a list indicating a plurality of serving cells using Radio Resource Control (RRC) signaling, the list being for updating a path loss reference signal ID and a power control parameter for uplink transmission; and a control unit that, when a Medium Access Control-Control Element (MAC CE) indicating information related to a path loss reference signal ID and a power control parameter for uplink transmission is received for one of the plurality of serving cells, applies the path loss reference signal ID and the power control parameter specified in the information to each of the plurality of serving cells in the list, and the control unit reports capability information indicating that it supports application of an association of the path loss reference signal ID and the power control parameter to each of the plurality of serving cells. Effect of the Invention

[0009] According to one embodiment of the present disclosure, the PL-RS can be appropriately updated. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 illustrates an example of simultaneous TCI status updating for multiple serving cells. [Diagram 2] FIG. 2 is a diagram illustrating an example of an SRS path loss reference RS update MAC CE. [Diagram 3] FIG. 3 is a diagram showing an example of setting / updating an SRS resource set, a PL-RS, and spatial relationships. [Figure 4] FIG. 4 is a diagram illustrating an example of a PUSCH path loss reference RS update MAC CE. [Diagram 5] FIG. 5 is a diagram illustrating an example of setting / updating an SRI-PUSCH power control information element and a PUSCH path loss reference RS-ID. [Figure 6] FIG. 6 is a diagram illustrating an example of the operation of the first embodiment. [Figure 7] FIG. 7 is a diagram illustrating an example of the operation of the second embodiment. [Figure 8] FIG. 8 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Figure 9] FIG. 9 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Figure 10] FIG. 10 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Figure 11] FIG. 11 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] (TCI, spatial relations, QCL) In NR, it is considered to control reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and encoding) in a UE of at least one of a signal and a channel (referred to as a signal / channel) based on a transmission configuration indication state (TCI state).

[0012] The TCI state may represent a state that is applied to a downlink signal / channel. The equivalent of the TCI state that is applied to an uplink signal / channel may be expressed as a spatial relation.

[0013] The TCI state is information on the Quasi-Co-Location (QCL) of signals / channels, and may be called spatial reception parameters, spatial relation information, etc. The TCI state may be configured in the UE for each channel or for each signal.

[0014] A QCL is an index that indicates the statistical properties of a signal / channel. For example, when a signal / channel and another signal / channel are in a QCL relationship, it may mean that it can be assumed that at least one of the following is the same (QCL with respect to at least one of the following) between these different signals / channels: Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (e.g., spatial Rx parameter).

[0015] In addition, the spatial reception parameters may correspond to a reception beam (e.g., a reception analog beam) of the UE, and the beam may be specified based on a spatial QCL. A QCL (or at least one element of a QCL) in the present disclosure may be replaced with a spatial QCL (sQCL).

[0016] A plurality of types (QCL types) of QCL may be defined. For example, four QCL types AD may be provided, each having different parameters (or parameter sets) that can be assumed to be the same. The parameters (which may be called QCL parameters) are as follows: QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL type B (QCL-B): Doppler shift and Doppler spread, QCL type C (QCL-C): Doppler shift and mean delay, · QCL type D (QCL-D): spatial reception parameters.

[0017] The UE's assumption that a Control Resource Set (CORESET), channel, or reference signal is in a specific QCL (e.g., QCL type D) relationship with another CORESET, channel, or reference signal may be referred to as a QCL assumption.

[0018] The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal / channel based on the TCI condition or QCL assumptions of the signal / channel.

[0019] The TCI state may be, for example, information about the QCL of the channel of interest (in other words, the Reference Signal (RS) for that channel) and another signal (e.g., another RS). The TCI state may be set (indicated) by higher layer signaling, physical layer signaling, or a combination of these.

[0020] The physical layer signaling may be, for example, Downlink Control Information (DCI).

[0021] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0022] In addition, the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).

[0023] An SSB is a signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). An SSB may be referred to as an SS / PBCH block.

[0024] An RS of QCL type X in a TCI state may refer to an RS that has a QCL type X relationship with a certain channel / signal (its DMRS), and this RS may be called a QCL source of QCL type X in the TCI state.

[0025] (Pathloss RS) Path loss PL for each transmission power control of PUSCH, PUCCH, and SRS b,f,c (q d ) [dB] is the index q of the reference signal (RS, Pathloss Reference RS) for the downlink BWP associated with the active UL BWP b of the carrier f of the serving cell c d In this disclosure, the path loss reference RS, pathloss(PL)-RS, and index q d , an RS used in a path loss calculation, and an RS resource used in a path loss calculation may be interpreted as interchangeable. In the present disclosure, the terms calculate, estimate, measure, and track may be interpreted as interchangeable.

[0026] It is under consideration whether to modify the existing mechanism of higher layer filtered RSRP for path loss measurement when the path loss RS is updated by the MAC CE.

[0027] When the pathloss RS is updated by the MAC CE, the pathloss measurement based on L1-RSRP may be applied. At an available timing after the MAC CE for updating the pathloss RS, the upper layer filter RSRP may be used for the pathloss measurement, and the L1-RSRP may be used for the pathloss measurement before the upper layer filter RSRP is applied. At an available timing after the MAC CE for updating the pathloss RS, the upper layer filter RSRP may be used for the pathloss measurement, and before that timing, the upper layer filter RSRP of the previous pathloss RS may be used. Similar to the operation of Rel. 15, the upper layer filter RSRP may be used for the pathloss measurement, and the UE may track all pathloss RS candidates configured by the RRC. The maximum number of pathloss RSs configurable by the RRC may depend on the UE capability. If the maximum number of pathloss RSs configurable by the RRC is X, X or less pathloss RS candidates may be configured by the RRC, and the pathloss RS may be selected by the MAC CE from among the configured pathloss RS candidates. The maximum number of pathloss RSs configurable by the RRC may be 4, 8, 16, 64, etc.

[0028] In this disclosure, upper layer filtered RSRP, filtered RSRP, and layer 3 filtered RSRP may be interpreted as interchangeable.

[0029] (Beam Management) In DL / UL beam management, more efficient beam management, such as lower latency and lower overhead, is being considered.

[0030] <Simultaneous beam update for multiple CCs> In Rel.16, one MAC CE can update the beam index (TCI state) of multiple CCs, which enables low overhead and low latency beam direction.

[0031] The UE may be configured by the RRC with up to two applicable CC lists (e.g., applicable-CC-list). When two applicable CC lists are configured, the two applicable CC lists may correspond to in-band CA in FR1 and in-band CA in FR2, respectively.

[0032] Activation of TCI states on PDCCH The MAC CE activates the TCI states associated with the same CORESET ID on all BWP / CCs in the applicable CC list.

[0033] Activation of the TCI state for the PDSCH The MAC CE activates the TCI state on all BWP / CCs in the applicable CC list.

[0034] A-SRS / SP-SRS Spatial Relationship Activation The MAC CE activates the spatial relationships associated with the same SRS resource ID on all BWPs / CCs in the applicable CC list.

[0035] In the example of Figure 1, the UE is configured with an applicable CC list indicating CC#0, #1, #2, #3, and a list indicating 64 TCI states for CORESET or PDSCH of each CC. When one TCI state in CC#0 is activated by the MAC CE, the corresponding TCI state is activated in CC#1, #2, #3.

[0036] For PDCCH / PDSCH / SRS, Rel.16 supports simultaneous updates of QCL / TCI states / spatial relations for a serving cell / set of CCs. The PL-RS for UL channels / RSs has a high relevance to the QCL / TCI states / spatial relations of UL channels / RSs. When the QCL for UL channels / RSs is updated, it is preferable that the PL-RS for UL channels / RSs is also updated. When the PL-RS for UL channels / RSs for a certain serving cell / CC is updated, it is preferable that the serving cell / CC in intra-band CA within that band also updates the PL-RS for UL channels / RSs.

[0037] <PL-RS for SRS> The UE is not assumed to simultaneously maintain more than 4 path loss estimations per serving cell for all PUSCH / PUCCH / SRS transmissions except for SRS transmissions configured by the SRS single configuration information element (SRS-Positioning-Config).

[0038] PL b,f,c (q d ) is the DL path loss estimation [dB] calculated by the UE using the RS resource index q c for the active DL BWP of the serving cell d . The RS resource index q d is the SRS resource set q sThe pathloss reference RS information element (pathlossReferenceRS) associated with the PL-RS resource set qs is provided by an SSB index (ssb-Index) providing an SS / PBCH block index, or a CSI-RS index (csi-RS-Index) providing a CSI-RS resource index. If the UE is provided with a PL-RS update enable information element (enablePLRSupdateForPUSCHSRS) for PUSCH and SRS, the MAC CE can provide the corresponding RS resource index qd for the aperiodic or semi-persistent SRS resource set qs by an SRS pathloss reference RS-ID (SRS-PathlossReferenceRS-Id), i.e., it is explicitly configured / indicated by at least one of the PL-RS, RRC (pathlossReferenceRS) and MAC CE (SRS-PathlossReferenceRS-Id) for the SRS resource set.

[0039] An SRS pathloss reference RS update MAC CE is considered. As shown in the example of FIG. 2, the serving cell ID field, the BWP ID field, and the SRS pathloss reference RS update MAC CE include an SRS resource set ID field and a pathloss reference RS-ID field. The SRS resource set ID field indicates the SRS resource set ID identified by the SRS resource set ID information element. The pathloss reference RS-ID field indicates the pathloss reference RS-ID identified by the pathloss reference RS-ID information element. This pathloss reference RS-ID updates the pathloss reference RS-ID for the SRS resource set indicated by the SRS resource set ID field. That is, the PL-RS of the SRS is updated by the SRS pathloss reference RS-ID (SRS-PathlossReferenceRS-Id) in the MAC CE.

[0040] In Rel.16, the SRS resource set information element (SRS-ResourceSet) includes a pathloss reference RS information element (pathlossReferenceRS, PathlossReferenceRS-Config) and a pathloss reference RS list (pathlossReferenceRS-List-r16, a list of PathlossReferenceRS-Configs). The pathloss reference RS information element (PathlossReferenceRS-Config) includes an SSB index or a CSI-RS index. The PL-RS is configured as part of the SRS resource set.

[0041] In the example of Figure 3, SRS resource set #1 includes SRS resources #1 and #2. The spatial relations #1 and #2 for SRS are associated with SRS resources #1 and #2 respectively. The PL-RS #1 for SRS is associated with SRS resource set #1 by at least one of RRC and MAC CE.

[0042] <PL-RS for PUSCH> The UE may be configured with a number of RS resource indexes up to the maximum number of PUSCH pathloss reference RSs (maxNrofPUSCH-PathlossReferenceRSs) and a set of RS configurations for those RS resource indexes by the PUSCH pathloss reference RS information element (PUSCH-PathlossReferenceRS). The UE identifies the RS resource index q corresponding to the SS / PBCH block index or CSI-RS resource index provided as the PUSCH pathloss reference RS-ID (PUSCH-PathlossReferenceRS-Id) within the PUSCH pathloss reference RS information element. d to identify.

[0043] If the UE is provided with an SRI-PUSCH power control information element (SRI-PUSCH-PowerControl) and more than one value of PUSCH pathloss reference RS-ID (PUSCH-PathlossReferenceRS-Id), the UE derives a mapping between the SRI-PUSCH power control ID (sri-PUSCH-PowerControl-Id) in the SRI-PUSCH power control information element and a set of values ​​for the SRI field in the DCI format that schedules PUSCH transmissions. The UE determines the RS resource index q d may be determined as PUSCH pathloss reference RS-ID equal to 0. The SRI-PUSCH power control information element indicates a mapping between an SRI-PUSCH power control ID and a PUSCH power control configuration. The PUSCH power control configuration may include at least one of a P0-PUSCH-AlphaSet-ID (sri-PUSCH-P0-PUSCH-AlphaSetId), an index of a closed power control loop (sri-PUSCH-ClosedLoopIndex), and a pathloss reference RS-ID (sri-PUSCH-PathlossReferenceRS-Id). In the present disclosure, the SRI-PUSCH power control ID, the SRI ID, and the code point of the SRI field in the DCI may be interpreted as mutually interchangeable.

[0044] A PUSCH pathloss reference RS update MAC CE is considered. As shown in the example of FIG. 4, the PUSCH pathloss reference RS update MAC CE includes a serving cell ID field, a BWP ID field, a PUSCH pathloss reference RS-ID field, a C field, and an SRI ID field. The PUSCH pathloss reference RS-ID field indicates the PUSCH pathloss reference RS-ID identified by the PUSCH pathloss reference RS-ID information element. This PUSCH pathloss reference RS-ID is updated in the SRI-PUSCH power control mapping indicated by one or more SRI ID fields in the same MAC CE. The C field indicates the presence of an additional SRI IF in the last octet of this MAC CE. If the C field is 1, there are two SRI-IDs in the last octet, otherwise there is one SRI-ID in the last octet. There are two SRI IDs, and the SRI ID field indicates the SRI-PUSCH power control ID identified by the SRI-PUSCH power control ID information element.

[0045] If the enable PL-RS update information element for PUSCH and SRS (enablePLRSupdateForPUSCHSRS) is configured for enabling the MAC CE update function, at least one SRI-PUSCH power control information element should be configured. The MAC CE updates the association between the configured SRI-PUSCH power control information element and the PUSCH path loss reference RS-ID.

[0046] The SRI-PUSCH power control information element includes a PUSCH path loss reference RS-ID, so that the RRC sets up an association between the configured SRI-PUSCH power control information element and the PUSCH path loss reference RS-ID.

[0047] In the example of FIG. 5, by at least one of RRC and MAC CE, the SRI-PUSCH power control information element #1 (SRI-PUSCH-PowerControl-Id = 1) is associated with the PUSCH path loss reference RS #1 (PUSCH-PathlossReferenceRS-Id = 1), and the SRI-PUSCH power control information elements #2, #3 (SRI-PUSCH-PowerControl-Id = 2, 3) are associated with the PUSCH path loss reference RS #2 (PUSCH-PathlossReferenceRS-Id = 2).

[0048] When the spatial relationship of SRS is updated, the spatial relationship of PUSCH may also be regarded as updated accordingly. Simultaneous spatial relationship update of the set of serving cells for SRS is supported in Rel. 16. This means that the spatial relationship of PUSCH may be updated across multiple serving cells. However, PUSCH PL-RS update across multiple serving cells is not supported.

[0049] <PL-RS for PUCCH> The UE identifies the RS resource index q corresponding to the SS / PBCH block index or CSI-RS resource index provided by the PUCCH path loss reference R-ID (PUCCH-PathlossReferenceRS-Id) within the PUCCH path loss reference RS information element (PUCCH-PathlossReferenceRS). d to identify.

[0050] If the UE is provided with a pathloss reference RS information element (pathlossReferenceRS) and a PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), the UE obtains a mapping between the PUCCH spatial relationship information values ​​and a set of reference signal information element (referenceSignal) values ​​provided by the PUCCH pathloss reference RS information element through an index provided by a corresponding value of PUCCH pathloss reference RS-ID. If the UE is provided with more than one value of PUCCH spatial relationship information ID (PUCCH-SpatialRelationInfoId) and the UE receives an activation command indicating a value of PUCCH spatial relationship information ID, the UE determines the reference signal information element value in the PUCCH pathloss reference RS information element through a link to the corresponding PUCCH pathloss reference RSID index.

[0051] If the UE is provided with a pathloss reference RS information element and is not provided with PUCCH spatial relationship information, the UE obtains a reference signal information element in the PUCCH pathloss reference RS from a PUCCH pathloss reference RS-ID with index 0 in the PUCCH pathloss reference RS.

[0052] The PUCCH spatial relationship information includes a PUCCH pathloss reference RS-ID. The Rel.16 PUCCH spatial relationship information (PUCCH-SpatialRelationInfo-r16) includes a Rel.16 PUCCH pathloss reference RS-ID (PUCCH-PathlossReferenceRS-Id-r16). That is, for PUCCH, the pathloss reference RS information element is part of the PUCCH spatial relationship information. As soon as the spatial relationship information of the PUCCH is updated, the PL-RS of the PUCCH is updated.

[0053] Not all serving cells have PUCCH resources. Only a portion of multiple serving cells may be configured with PUCCH resources. Serving cells with PUCCH resources are not in the same cell group. Therefore, simultaneous QCL updates for PUCCH across multiple serving cells may not be supported.

[0054] For PUCCH, the PL-RS is part of the spatial relationship configuration. When the spatial relationship for PUCCH is updated, the PL-RS for PUCCH is updated as well. The PL-RS for PUCCH does not need to be updated separately.

[0055] If the PL-RS for UL transmission (UL channel / UL signal) is updated for each serving cell, there is a risk that overhead / latency will increase and throughput will decrease.

[0056] Therefore, the present inventors have conceived of a method for simultaneously updating the PL-RS for one or more serving cells / BWPs.

[0057] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The configurations described in each embodiment may be applied alone or in combination.

[0058] In the present disclosure, "A / B" and "at least one of A and B" may be read as interchangeable. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, and band may be read as interchangeable. In the present disclosure, index, ID, indicator, and resource ID may be read as interchangeable. In the present disclosure, RRC, RRC parameter, RRC message, higher layer parameter, information element (IE), and configuration may be read as interchangeable. In the present disclosure, support, control, can be controlled, operate, and can operate may be read as interchangeable.

[0059] In the present disclosure, the terms activate, update, indicate, enable, and specify may be read as interchangeable.

[0060] In the present disclosure, the terms MAC CE, update command, and activation / deactivation command may be interchangeable.

[0061] In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like.

[0062] The MAC signaling may be, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.

[0063] In the present disclosure, beam, spatial domain filter, TCI state, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, UE receive beam, DL beam, DL receive beam, DL precoding, DL precoder, DL-RS, QCL type D in TCI state, RS for QCL type D in TCI state, RS for QCL type D in TCI state or QCL assumption, RS for QCL type A in TCI state or QCL assumption, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder may be read as interchangeable. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS may be read as interchangeable.

[0064] In the present disclosure, CC list, cell list, applicable list, list of applicable BWP / CC, simultaneous TCI update list, simultaneousTCI-UpdateList-r16 / simultaneousTCI-UpdateListSecond-r16, simultaneous TCI cell list, simultaneousTCI-CellList, simultaneous spatial update list, simultaneousSpatial-UpdateList-r16 / simultaneousSpatial-UpdateListSecond-r16, simultaneousSpatial-UpdatedList-r16 / simultaneousSpatial-UpdatedListSecond-r16, configured CC, configured list, BWP / CC in the configured list, all BWP / CC in the configured list, CC indicated by the activation command, indicated CC, CC that received MAC CE, and information indicating multiple cells for updating at least one of TCI state and spatial relationship may be read as interchangeable.

[0065] (Wireless communication method) For SRS / PUSCH / PUCCH, the PL-RS in multiple BWP / CCs may be updated simultaneously by the MAC CE or DCI. The PL-RS in any of the following BWP / CCs 1 to 4 may be updated simultaneously. [BWP / CC1] All BWP / CCs in the configured CC list [BWP / CC2] All BWPs in one CC [BWP / CC3] All BWP / CC in one frequency band [BWP / CC4] All configured / active BWP / CC

[0066] <First embodiment> The UE may support simultaneous PL-RS updates for SRS via MAC CE for a set of serving cells / CCs.

[0067] If two sets (lists) of serving cells are configured for simultaneous QCL updating and a UE receives an SRS pathloss reference RS update MAC CE for a PL-RS update for one SRS resource set of one serving cell belonging to one set, this MAC CE may be applied to one SRS resource set in all serving cells in the set.

[0068] In the example of Fig. 6, the UE is configured with a cell list indicating a set of CC#0, #1, #2, and #3 by RRC. When the MAC CE receives a MAC CE indicating CC#0, SRS resource set #1, and PL-RS#1, the UE applies PL-RS#1 to SRS resource set #1 in CC#0, #1, #2, and #3.

[0069] According to the PL-RS ID in the MAC CE, the same PL-RS ID or the same SSB index / CSI-RS index may be applied to the same SRS resource set ID for all serving cells in that set of serving cells.

[0070] The simultaneous updating of PL-RS for SRS for a set of serving cells / CCs with MAC CE may be applied to at least one of P-SRS, SP-SRS, and AP-SRS.

[0071] The two sets of serving cells for simultaneous QCL updating may be the same as or different from the set of serving cells specified in Rel.16.

[0072] For example, if the SRS pathloss reference RS update MAC CE is used to indicate PL-RS#A for SRS resource set#1, in the first embodiment, the PL-RS of SRS resource set#1 of other serving cells in the cell list is updated to PL-RS#A.

[0073] <<Variation>> If two sets (lists) of serving cells are configured for simultaneous QCL updating, and the UE receives an SRS pathloss reference RS update MAC CE for PL-RS update for one SRS resource set of one serving cell belonging to one set, this MAC CE may be applied to one or more SRS resource sets in all serving cells in the set. The PL-RS indicated by the MAC CE may follow either of the following options 1 and 2.

[0074] [Option 1] The indicated PL-RS may apply to the same type (time domain operation) of SRS, for example, if the indicated PL-RS is an AP-SRS, the PL-RS of all / other AP-SRS resources may be updated.

[0075] [Option 2] The indicated PL-RS may apply to all types of SRS (time domain operation), for example, if the indicated PL-RS is an AP-SRS, the PL-RS of all / other AP / SP / P-SRS resources may be updated.

[0076] For example, when a MAC CE updates the PL-RS in SRS resource set #1, the PL-RS in SRS resource sets other than SRS resource set #1 are also updated.

[0077] According to the above first embodiment, the PL-RS for SRS can be updated simultaneously for a plurality of cells.

[0078] <Second embodiment> The UE may support simultaneous PL-RS updating for PUSCH via MAC CE for a set of serving cells / CCs.

[0079] If two sets (lists) of serving cells are configured for simultaneous QCL updating and the UE receives a PUSCH pathloss reference RS update MAC CE for updating the association between the SRI-PUSCH power control information element and the PUSCH pathloss reference RS-ID for one serving cell belonging to one set, this MAC CE may be applied to all serving cells in the set.

[0080] In the example of Fig. 7, the UE is configured with a cell list indicating a set of CCs #0, #1, #2, and #3 by the RRC. When the MAC CE receives a MAC CE indicating CC #0, PL-RS #1, and SRI-PUSCH power control #1, the UE associates (maps) the SRS resource set #1 in CCs #0, #1, #2, and #3 in the cell list with the PL-RS #1.

[0081] The PUSCH pathloss reference RS-ID (or the SSB index / CSI-RS index according to the PUSCH pathloss reference RS-ID in this MAC CE) and the SRI ID may be applied to all serving cells in one set. All BWP / CCs may have the same configuration of PUSCH pathloss reference RS-ID and SRI ID by RRC.

[0082] The same ID of the activated / indicated SRI or the same SRI ID may be assumed in all BWP / CCs (for all serving cells in the set). All BWP / CCs may have the same configuration of SRI ID by RRC.

[0083] According to the above second embodiment, the PL-RS for PUSCH can be updated simultaneously for a plurality of cells.

[0084] <Third embodiment> The specification may specify UE capability signaling (UE capability information) to indicate whether or not the UE supports simultaneous PL-RS update for SRS for a set of serving cells / CCs via MAC CE. The SRS may be at least one resource set of P-SRS, SP-SRS, and AP-SRS.

[0085] The specification may provide UE capability signaling to indicate whether or not the UE supports simultaneous PL-RS update for PUSCH for a set of serving cells / CCs via the MAC CE.

[0086] According to the above third embodiment, it is possible to realize the functions of the first or second embodiment while maintaining compatibility.

[0087] <Fourth embodiment> When at least one of the following settings 1 and 2 is set, the functions of the first and second embodiments may be applied.

[0088] [Setting 1] For simultaneous updating of PL-RS, a list of applicable BWP / CC may be configured (as an RRC parameter), which may be at least one of a simultaneous pathloss reference RS update list, a first simultaneous pathloss reference RS update list, and a second simultaneous pathloss reference RS update list.

[0089] [Setting 2] For simultaneous updating of PL-RS, a list of applicable BWPs / CCs may not be configured. Either a list of applicable BWPs / CCs for simultaneous updating of TCI status for PDCCH / PDSCH or a list of applicable BWPs / CCs for simultaneous updating of spatial relationship for SRS may be configured (as an RRC parameter). This list may be used for simultaneous updating of Rel.16.

[0090] According to the above fourth embodiment, the UE can appropriately perform simultaneous updating of the PL-RS across multiple BWPs / CCs depending on the configuration.

[0091] (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0092] 8 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0093] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0094] 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.

[0095] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0096] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0097] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0098] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0099] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0100] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0101] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0102] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0103] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0104] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0105] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0106] In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.

[0107] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0108] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0109] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0110] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0111] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0112] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0113] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0114] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0115] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0116] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0117] (base station) 9 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0118] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0119] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0120] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0121] 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.

[0122] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0123] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0124] 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.

[0125] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0126] 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.

[0127] The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.

[0128] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0129] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0130] 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.

[0131] 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.

[0132] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0133] 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.

[0134] The transceiver 120 may transmit a list indicating one or more serving cells. When a medium access control-control element (MAC CE) indicating one serving cell ID and a path loss reference signal ID included in the list is transmitted, the controller 110 may apply the path loss reference signal ID to a sounding reference signal (SRS) resource set of each of the one or more serving cells.

[0135] The transceiver 120 may transmit a list indicating one or more serving cells. When a medium access control-control element (MAC CE) indicating one serving cell ID, a path loss reference signal ID, and one or more sounding reference signal resource indicator (SRI)-physical uplink shared channel (PUSCH) power control IDs included in the list is transmitted, the control unit 110 may apply an association between the path loss reference signal ID and the one or more SRI-PUSCH power control IDs to each of the one or more serving cells.

[0136] (User terminal) 10 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.

[0137] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0138] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0139] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220.

[0140] The transmitting / receiving unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0141] 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.

[0142] The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.

[0143] 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.

[0144] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0145] The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.

[0146] The transceiver 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit sequence to be transmitted, and output a baseband signal.

[0147] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0148] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0149] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0150] The transceiver 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.

[0151] The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210.

[0152] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220, the transmitting / receiving antenna 230, and the transmission path interface 240.

[0153] The transceiver 220 may receive a list indicating one or more serving cells. When a medium access control-control element (MAC CE) indicating one serving cell ID and a path loss reference signal (RS)-ID included in the list is received, the controller 210 may apply the path loss reference signal ID to each sounding reference signal (SRS) resource set of the one or more serving cells.

[0154] The MAC CE may include an SRS resource set ID, and the SRS resource set may have the SRS resource set ID.

[0155] If the MAC CE is received, the controller 210 may apply the path loss reference signal ID to one or more SRS resource sets in each of the one or more serving cells.

[0156] The control unit 210 may report capability information indicating that the application is supported.

[0157] The transceiver 220 may receive a list indicating one or more serving cells. When a medium access control-control element (MAC CE) indicating one serving cell ID, a path loss reference signal ID, and one or more sounding reference signal resource indicator (SRI)-physical uplink shared channel (PUSCH) power control IDs included in the list is received, the controller 210 may apply an association between the path loss reference signal ID and the one or more SRI-PUSCH power control IDs to each of the one or more serving cells.

[0158] The SRI-PUSCH power control ID configured among the one or more serving cells may be the same, and the path loss reference signal ID configured among the one or more serving cells may be the same.

[0159] The SRI-PUSCH power control ID configured, activated or indicated among the one or more serving cells may be the same.

[0160] The control unit 210 may report capability information indicating that the application is supported.

[0161] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0162] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0163] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0164] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0165] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0166] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0167] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0168] Moreover, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0169] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0170] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., a Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, key drive), a magnetic stripe, a database, a server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0171] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0172] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0173] In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between each device.

[0174] Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0175] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0176] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0177] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0178] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0179] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0180] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0181] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0182] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0183] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0184] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0185] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0186] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0187] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0188] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0189] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0190] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0191] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0192] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0193] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0194] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0195] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0196] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0197] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0198] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0199] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0200] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0201] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0202] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0203] The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or by comparing numerical values ​​(e.g., with a predetermined value).

[0204] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0205] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0206] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0207] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0208] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0209] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0210] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0211] A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.

[0212] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0213] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0214] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0215] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) and a Serving-Gateway (S-GW)), or a combination thereof.

[0216] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0217] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0218] As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

[0219] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.

[0220] The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like.

[0221] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0222] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0223] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0224] The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.

[0225] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0226] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0227] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0228] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0229] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0230] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. a receiving unit configured to receive a list indicating a plurality of serving cells using Radio Resource Control (RRC) signaling, the list being for updating a path loss reference signal ID and a power control parameter for uplink transmission; and a control unit that, when a Medium Access Control-Control Element (MAC CE) indicating information related to a path loss reference signal ID and a power control parameter for uplink transmission is received for one serving cell among the plurality of serving cells, applies the path loss reference signal ID and the power control parameter specified by the information to each of the plurality of serving cells in the list; The control unit reports capability information indicating that application of the association of the path loss reference signal ID and the power control parameter to each of the plurality of serving cells is supported.

2. The terminal according to claim 1, wherein the control unit controls transmission of at least one of a sounding reference signal (SRS), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)) based on the path loss reference signal ID and the power control parameter.

3. reporting capability information indicating support for application of an association between a path loss reference signal ID and a power control parameter for uplink transmission for each of a plurality of serving cells; receiving the list for updating the path loss reference signal ID and the power control parameter, the list indicating the plurality of serving cells, using Radio Resource Control (RRC) signaling; and when a Medium Access Control-Control Element (MAC CE) indicating information relating to a path loss reference signal ID and a power control parameter for uplink transmission is received for one of the plurality of serving cells, applying the path loss reference signal ID and the power control parameter specified in the information to each of the plurality of serving cells in the list.

4. a receiver for receiving a capability information report indicating support for application of an association between a path loss reference signal ID and a power control parameter for uplink transmission for each of a plurality of serving cells; a transmitter configured to transmit the list indicating the plurality of serving cells by using Radio Resource Control (RRC) signaling, the list being for updating the path loss reference signal ID and the power control parameter; and a control unit that transmits a Medium Access Control-Control Element (MAC CE) indicating information related to a path loss reference signal ID and a power control parameter for uplink transmission for one serving cell among the plurality of serving cells, such that a terminal applies the path loss reference signal ID and the power control parameter specified by the information to each of the plurality of serving cells in the list.

5. A system having a terminal and a base station, The terminal includes: a receiving unit configured to receive a list indicating a plurality of serving cells using Radio Resource Control (RRC) signaling, the list being for updating a path loss reference signal ID and a power control parameter for uplink transmission; and a control unit that, when a Medium Access Control-Control Element (MAC CE) indicating information related to a path loss reference signal ID and a power control parameter for uplink transmission is received for one serving cell among the plurality of serving cells, applies the path loss reference signal ID and the power control parameter specified by the information to each of the plurality of serving cells in the list; The control unit reports capability information indicating that application of the association of the path loss reference signal ID and the power control parameter to each of the plurality of serving cells is supported; The base station, A receiving unit for receiving a report of the capability information; A transmitting unit that transmits the list.

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