Terminal and wireless communication method

Abstract

A terminal of one embodiment of the present disclosure includes a reception unit that receives setting information of one uplink transmission of a physical uplink control channel (PUCCH) and a sounding reference signal (SRS), the setting information not including information of spatial relation information and a reference signal for path loss reference; and a control unit that uses a reference signal of an activated transmission control indication (TCI) state with the lowest ID for a physical downlink shared channel (PDSCH) in path loss calculation for the uplink transmission.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a terminal in a next-generation mobile communication system and a wireless communication method. BACKGROUND

[0002] In a Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been standardized for the purpose of further higher-speed data rates, lower delay, and so on (Non-Patent Literature 1). Further, LTE-Advanced (3GPP Rel. 10-14) has been standardized for the purpose of further larger capacity, higher degree of integration, and so on of LTE (3rd Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE are also being researched (for example, also referred to as 5th generation mobile communication system (5G), 5G (plus), New Radio (NR), 3GPP Rel. 15 onwards, and so on).

[0004] Prior Art Documents

[0005] Non-Patent Literature

[0006] Non-Patent Literature 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

[0007] Problems to be Solved by the Invention

[0008] In future wireless communication systems (for example, NR), it is being researched that a user terminal (terminal, user terminal, User Equipment (UE)) controls transmission and reception processing based on information related to Quasi-Co-Location (QCL).

[0009] However, it is unclear how to decide a reference signal (RS) for at least one of QCL and path loss calculation in reception of a downlink (DL) signal or transmission of an uplink (UL) signal. If the UE does not appropriately decide a proper reference signal, there is a concern that throughput decreases or the like system deteriorates.

[0010] Therefore, an object of the present disclosure is to provide a terminal and a wireless communication method that appropriately decide a reference signal for at least one of QCL and path loss calculation.

[0011] Solution to Problem

[0012] A terminal of one embodiment of the present disclosure includes a reception unit that receives setting information of one uplink transmission of a physical uplink control channel (PUCCH) and a sounding reference signal (SRS), the setting information not including information of spatial relation information and a reference signal for path loss reference; and a control unit that uses a reference signal of an activated transmission control indication (TCI) state with the lowest ID for a physical downlink shared channel (PDSCH) in path loss calculation for the uplink transmission.

[0013] Effects of Invention

[0014] According to one embodiment of the present disclosure, it is possible to appropriately decide a reference signal for at least one of QCL and path loss calculation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a diagram illustrating an example of QCL assumption of a PDSCH.

[0016] Figure 2 FIG. 2 is a diagram illustrating an example of an operation related to Embodiment 1.

[0017] Figure 3 FIG. 3 is a diagram illustrating an example of an operation related to Embodiment 6.

[0018] Figure 4 FIG. 4 is a diagram illustrating an example of a schematic configuration of a wireless communication system related to one embodiment.

[0019] Figure 5 FIG. 5 is a diagram illustrating an example of a structure of a base station related to one embodiment.

[0020] Figure 6 FIG. 6 is a diagram illustrating an example of a structure of a user terminal related to one embodiment.

[0021] Figure 7 FIG. 7 is a diagram illustrating an example of a hardware structure of a base station and a user terminal related to one embodiment. DETAILED DESCRIPTION

[0022] (transmission power control)

[0023] Transmission power control for PUSCH

[0024] In NR, the transmission power of PUSCH is controlled based on a TPC command (also referred to as a value, an increment / decrement value, a correction value, etc.) indicated by a value of a specific field (also referred to as a TPC command field, etc.) within DCI.

[0025] For example, in a case where the UE transmits PUSCH on an active UL BWP b of a carrier f of a serving cell c using a numerology with an index j (an open loop numerology), an index l of a power control adjustment state (a PUSCH power control adjustment state), the transmission power (P PUSCH，b，f，c (i, j, q d , l)) of the PUSCH in a PUSCH transmission occasion (also referred to as a transmission period, etc.) i can also be represented by the following equation (1). The power control adjustment state can also be referred to as a value of a TPC command based on the power control adjustment state index l, a cumulative value of a TPC command, a closed loop based value. The l can also be referred to as a closed loop index.

[0026] Further, the PUSCH transmission occasion i is a period in which the PUSCH is transmitted, and for example, can also be constituted by one or more symbols, one or more slots, etc.

[0027] [Mathematical equation 1]

[0028]

[0029] Here, P CMAX，f，c(i) For example, is a transmission power (also referred to as a maximum transmission power, a UE maximum output power, etc.) of a user terminal set for the carrier f of the serving cell c in the transmission occasion i. P O＿PUSCH，b，f，c (j) For example, is a parameter (for example, also referred to as a parameter related to a transmission power offset, a transmission power offset P0, a target received power parameter, etc.) involved in a target received power set for the active UL BWP b of the carrier f of the serving cell c in the transmission occasion i.

[0030] For example, is a number of resource blocks (bandwidth) allocated to the PUSCH in the transmission occasion i in the active UL BWP b of the carrier f of the serving cell c and the subcarrier spacing μ. α b，f，c(j) is a value provided by a higher layer parameter (e.g., also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.).

[0031] PL b，f，c (q d ) is an index q of a reference signal (RS), a path loss reference RS, a RS for path loss reference, a DL-RS for path loss measurement, a PUSCH-PathlossReferenceRS, for example, using a downlink BWP associated with an activated UL BWP b of a carrier f of a serving cell c d , whereby a path loss (path loss estimate [dB], path loss compensation) is calculated by the user terminal.

[0032] In a case where the UE is not provided with a path loss reference RS (e.g., a PUSCH-PathlossReferenceRS), or in a case where the UE is not provided with a dedicated higher layer parameter, the UE can also use an RS resource from a synchronization signal (SS) / physical broadcast channel (PBCH) block (SS block (SSB)) used for obtaining a Master Information Block (MIB) to calculate a PL b，f，c (q d ).

[0033] In a case where the UE is provided with a set of RS resource indices up to a value of a maximum number of path loss reference RSs (e.g., maxNrofPUSCH-PathlossReferenceRSs), and a set of respective RS configurations for the RS resource indices by a path loss reference RS, the set of RS resource indices can also contain one or both of a set of SS / PBCH block indices and a set of channel state information (CSI)-reference signal (RS) resource indices. The UE can also identify an RS resource index q d .

[0034] In a case where a PUSCH transmission is scheduled by a Random Access Response (RAR) UL grant, the UE can also use the same RS resource index q d .

[0035] In a case that a UE is provided with a configuration of power control for PUSCH based on a Sounding Reference Signal (SRS) resource indicator (SRI) (e.g., SRI-PUSCH-PowerControl) and is provided with one or more values of an ID of a path loss reference RS, the UE can also derive a mapping between a set of values for an SRI field within a DCI format 0_1 and a set of values of an ID of a path loss reference RS from higher layer signaling (e.g., sri-PUSCH-PowerControl-Id within SRI-PUSCH-PowerControl). The UE can also determine a RS resource index q d .

[0036] In a case that a PUSCH transmission is scheduled by a DCI format 0_0 and the UE is not provided with PUCCH spatial relation information for a PUCCH resource with a lowest index for an activated UL BWP b per carrier f and serving cell c, the UE can also use a RS resource index q d .

[0037] In a case that a PUSCH transmission is scheduled by a DCI format 0_0 and the UE is not provided with a spatial configuration for a PUCCH transmission, or in a case that a PUSCH transmission is scheduled by a DCI format 0_1 not containing an SRI field, or in a case that a configuration of power control for SRI-based PUSCH is not provided to the UE, the UE can also use a RS resource index q d .

[0038] In a case that for a PUSCH transmission configured by a configured grant configuration (e.g., ConfiguredGrantConfig), the configured grant configuration contains a specific parameter (e.g., rrc-ConfiguredUplinkGrant), a RS resource index q d may also be provided to the UE by a path loss reference index (e.g., pathlossReferenceIndex) within the specific parameter.

[0039] In a case where the grant configuration does not contain a specific parameter for the PUSCH transmission configured by the configured grant configuration, the UE can also determine the RS resource index q according to a value of an ID of a path loss reference RS mapped to an SRI field within a DCI format scheduling the PUSCH transmission d In a case where the DCI format does not contain the SRI field, the UE can also determine the RS resource index q with an ID of a path loss reference RS of zero d .

[0040] Δ TF，b，f，c (i) is a transmission power adjustment component (offset, transmission format compensation) for the UL BWP b of the carrier f of the serving cell c.

[0041] f b，f，c (i, l) is a PUSCH power control adjustment state for the activated UL BWP b of the carrier f of the serving cell c in the transmission opportunity i. For example, f b，f，c (i, l) can also be expressed by Equation (2).

[0042] [Equation 2]

[0043]

[0044] Here, δ PUSCH，b，f，c (i, l) can also be a TPC command value included in a DCI format 0_0 or a DCI format 0_1 scheduling the PUSCH transmission opportunity i on the activated UL BWP b of the carrier f of the serving cell c, or a TPC command value encoded in combination with other TPC commands within a DCI format 2_2 having a CRC scrambled by a specific RNTI (Radio Network Temporary Identifier) (e.g., TPC-PUSCH-RNTI).

[0045] may also be a sum of TPC command values within a set D i of TPC command values having a cardinality C(D i may also be a sum of TPC command values within a set D i may also be a sum of TPC command values within a set D PUSCH (i-i0)-1 symbols before the PUSCH transmission opportunity i for the PUSCH power control adjustment state l on the activated UL BWP b of the carrier f of the serving cell c. PUSCH(i) a set of TPC command values received before the symbols. i0may also be K PUSCH (i-i0) a smallest positive integer before the symbols of the PUSCH transmission opportunity i PUSCH (i) a smallest positive integer before the symbols.

[0046] In a case where the PUSCH transmission is scheduled by DCI format 0_0 or DCI format 0_1, K PUSCH (i) can also be a number of symbols in the active UL BWP b of the carrier f of the serving cell c which is later than the last symbol of the corresponding PDCCH reception and which is earlier than the first symbol of the PUSCH transmission. In a case where the PUSCH transmission is set by a configured grant configuration information (ConfiguredGrantConfig), K PUSCH (i) can also be K which is equal to the product of PUSCH,min The number of symbols: the product is the number of symbols N symb slot The product of the minimum value of the values provided by k2 within the PUSCH common configuration information (PUSCH-ConfigCommon).

[0047] The power control adjustment state can also be set by a higher layer parameter whether to have multiple states (for example, two states) or to have a single state. Furthermore, in a case where multiple power control adjustment states are set, one of the multiple power control adjustment states can also be identified by an index l (for example, l e {0, 1}).

[0048] In addition, the formulas (1), (2) are merely examples, but are not limited thereto. The user terminal can control the transmission power of the PUSCH based on at least one parameter exemplified in the formulas (1), (2), can include an additional parameter, or can omit a part of the parameters. Furthermore, in the above formulas (1), (2), the transmission power of the PUSCH is controlled per active UL BWP of a certain carrier of a certain serving cell, but is not limited thereto. At least a part of the serving cell, the carrier, the BWP, and the power control adjustment state can be omitted.

[0049] < PUCCH Transmission Power Control >

[0050] Furthermore, in NR, the transmission power of the PUCCH is controlled based on a TPC command (also referred to as a value, an increment / decrement value, a correction value, an indication value, etc.) indicated by a value of a specific field (also referred to as a TPC command field, a first field, etc.) within DCI.

[0051] For example, a transmission power of a PUCCH in a PUCCH transmission occasion (also referred to as a transmission period, etc.) i of an active UL BWP b of a carrier f of a serving cell c using an index l of a power control adjustment state (PUCCH power control adjustment state) can be expressed by the following formula (1). The power control adjustment state can also be referred to as a value of a TPC command based on the power control adjustment state index l, a cumulative value of a TPC command, a value based on a closed loop. The l can also be referred to as a closed loop index. PUCCH，b，f，c (i, q u , q d , l)) can also be expressed by the following formula (3). The power control adjustment state can also be referred to as a value of a TPC command based on the power control adjustment state index l, a cumulative value of a TPC command, a value based on a closed loop. The l can also be referred to as a closed loop index.

[0052] In addition, the PUCCH transmission occasion i is a period in which a PUCCH is transmitted, for example, can also be constituted by one or more symbols, one or more slots, etc.

[0053] [Formula 3]

[0054]

[0055] Here, P CMAX，f，c (i) is, for example, a transmission power of a user terminal set in the carrier f of the serving cell c in the transmission occasion i (also referred to as a maximum transmission power, a UE maximum output power, etc.). P O＿PUCCH，b，f，c (q u ) is, for example, a parameter related to a target reception power set in the active UL BWP b of the carrier f of the serving cell c in the transmission occasion i (for example, also referred to as a parameter related to a transmission power offset, a transmission power offset P0, or a target reception power parameter, etc.).

[0056] is, for example, a number of resource blocks (bandwidth) allocated to a PUCCH in the transmission occasion i in the active UL BWP b of the carrier f of the serving cell c and the subcarrier spacing μ. PL b，f，c (q d ) is, for example, an index q d of a reference signal (path loss reference RS, RS for path loss reference, DL-RS for path loss measurement, PUCCH-PathlossReferenceRS) using a downlink BWP associated with the active UL BWP b of the carrier f of the serving cell c.

[0057] In case the UE is not given pathloss reference RSs (pathlossReferenceRSs), or before the UE is given a dedicated higher layer parameter, the UE uses the RS resource obtained from the SS / PBCH block used by the UE to acquire the MIB to calculate the pathloss PL b，f，c (q d )。

[0058] In case the UE is given pathloss reference RS information (pathlossReferenceRSs within PUCCH-PowerControl) and not given PUCCH spatial relation information (PUCCH-SpatialRelationInfo), the UE obtains the value of the reference signal within the PUCCH pathloss reference RS with PUCCH-PathlossReferenceRS-Id equal to the value of the index 0 within PUCCH-PathlossReferenceRS-Info. The resource of this reference signal is either on the same serving cell, or on the serving cell indicated by the value of pathlossReferenceLinking if given. The pathlossReferenceLinking indicates which DL of the special cell (SpCell) and the secondary cell (SCell) corresponding to this UL the UE applies as pathloss reference. The SpCell can be either the primary cell (PCell) in the master cell group (MCG) or the primary secondary cell (PSCell) in the secondary cell group (SCG). The pathlossReferenceRS-Info indicates the set of reference signals (e.g., CSI-RS configurations or SS / PBCH blocks) used in PUCCH pathloss estimation.

[0059] Δ F＿PUCCH (F) is a higher layer parameter given per PUCCH format. Δ TF，b，f，c (i) is the transmission power adjustment component (offset) for UL BWP b of carrier f of serving cell c.

[0060] gb，f，c (i, l) is a value of the TPC command (e.g., a power control adjustment state, a cumulative value of TPC commands, a closed loop based value, a PUCCH power adjustment state) based on the above-mentioned power control adjustment state index l of the serving cell c and the carrier f of the transmission opportunity i. For example, g b，f，c (i, l) can also be expressed by Equation (4).

[0061] [Equation 4]

[0062]

[0063] Here, δ PUCCH，b，f，c (i, l) is a TPC command value, which can also be contained in the DCI format 1_0 or the DCI format 1_1 detected by the UE in the PUCCH transmission opportunity i of the active UL BWP b of the carrier f of the serving cell c, or encoded in combination with other TPC commands within the DCI format 2_2 having a CRC scrambled by a specific RNTI (Radio Network Temporary Identifier) (e.g., TPC-PUSCH-RNTI).

[0064] It can also be a sum of TPC command values within a set C i of TPC command values having a concentration (cardinality) C (C i ). i It can also be a sum of TPC command values within a set C PUCCH of TPC command values having a concentration (cardinality) C (C PUCCH ). PUCCH It can also be a sum of TPC command values within a set C PUCCH of TPC command values having a concentration (cardinality) C (C

[0065] In the case where the PUCCH transmission corresponds to the detection of the DCI format 1_0 or the DCI format 1_1 based on the UE, K PUCCH (i) can also be a number of symbols in the active UL BWP b of the carrier f of the serving cell c, which is later than the last symbol of the corresponding PDCCH reception and earlier than the first symbol of the PUCCH transmission. In the case where the PUCCH transmission is set by the configured grant configuration information (ConfiguredGrantConfig), KPUSCH (i) can also be K equal to the product of PUCCH,min the number of symbols, the product is the number of symbols N of each slot in the active UL BWP b of the carrier f of the serving cell c symb slot , the minimum value of the value provided by k2 within the PUSCH common structure information (PUSCH-ConfigCommon).

[0066] In the case where the UE is provided with information indicating the use of two PUCCH power control adjustment states (twoPUCCH-PC-AdjustmentStates), and PUCCH spatial relation information (PUCCH-SpatialRelationInfo), l = {0, 1}, and in the case where the UE is not provided with information indicating the use of two PUCCH power control adjustment states, or PUCCH spatial relation information, l can also be 0.

[0067] In the case where the UE derives the TPC command value from DCI format 1_0 or 1_1, and in the case where the UE is provided with PUCCH spatial relation information, the UE can also derive the mapping between the PUCCH spatial relation information ID (pucch-SpatialRelationInfoId) value and the closed loop index (closedLoopIndex, power adjustment state index l) according to the index provided by the PUCCH P0 ID (p0-PUCCH-Id within p0-Set within PUCCH-PowerControl within PUCCH-Config). In the case where the UE receives an activation command containing the value of the PUCCH spatial relation information ID, the UE can also determine the value of the closed loop index providing the value of l by the link to the corresponding PUCCH P0 ID.

[0068] In the case where the UE is provided with the configuration of the value of P O＿PUCCH，b，f，c (q u ) for the corresponding PUCCH power adjustment state l for the active UL BWP b of the carrier f of the serving cell c by higher layers, g b，f，c (i, l) = 0, k = 0, 1, …, i. In the case where the UE is provided with PUCCH spatial relation information, the UE can also determine the value of l according to the value of q u based on the PUCCH spatial relation information associated with the PUCCH P0 ID corresponding to q u .

[0069] q uP0-PUCCH-Id) indicating P0-PUCCH in the p0-Set for PUCCH.

[0070] In addition, the formulas (3) and (4) are merely examples, and are not limited thereto. The user terminal can control the transmission power of the PUCCH based on at least one parameter exemplified in the formulas (3) and (4), can include an additional parameter, and can omit a part of the parameters. Further, in the above formulas (3) and (4), the transmission power of the PUCCH is controlled for each activated UL BWP of a certain carrier of a certain serving cell, but is not limited thereto. At least one of the serving cell, the carrier, the BWP, and the power control adjustment state can be omitted.

[0071] <SRS Transmission Power Control>

[0072] For example, the transmission power (P SRS，b，f，c (i, q s , l)) of the SRS in the SRS transmission occasion (also referred to as a transmission period, etc.) i for the activated UL BWP b of the carrier f of the serving cell c using the index l of the power control adjustment state can be represented by the following formula (5). The power control adjustment state can also be referred to as a value of a TPC command based on the power control adjustment state index l, a cumulative value of the TPC command, a value based on a closed loop. The l can also be referred to as a closed loop index.

[0073] Further, the SRS transmission occasion i is a period in which the SRS is transmitted, and for example, can be composed of one or more symbols, one or more slots, etc.

[0074] [Formula 5]

[0075]

[0076] Here, P CMAX，f，c (i) is, for example, a UE maximum output power for the carrier f of the serving cell c in the SRS transmission occasion i. P O＿SRS，b，f，c (q s ) is a parameter (for example, also referred to as a parameter related to a transmission power offset, a transmission power offset P0, or a target reception power parameter, etc.) involved in a target reception power to which p0 is provided by the activated UL BWP b and the SRS resource set q s (provided by SRS-ResourceSet and SRS-ResourceSetId) for the carrier f of the serving cell c.

[0077] M SRS，b，f，c (i) is the SRS bandwidth represented by the number of resource blocks of the SRS transmission opportunity i on the active UL BWP b of the carrier f for the serving cell c and the subcarrier spacing μ.

[0078] α SRS，b，f，c (q s ) is provided by the α (e.g., alpha) of the active UL BWP b and the SRS resource set q s for the carrier f for the serving cell c and the subcarrier spacing μ.

[0079] PL b，f，c (q d ) is the DL path loss estimate [dB] calculated by the UE using the RS resource index q s for the active DL BWP and the SRS resource set q d , for the serving cell c. The RS resource index q d is the path loss reference RS (provided by pathlossReferenceRS, DL-RS for path loss measurement, e.g., pathlossReferenceRS) associated with the SRS resource set q s , and is the SS / PBCH block index (e.g., ssb-Index) or CSI-RS resource index (e.g., csi-RS-Index).

[0080] In case the UE is not given path loss reference RSs (pathlossReferenceRSs), or before the UE is given dedicated higher layer parameters, the UE calculates PL b，f，c (q d ) using the RS resource obtained from the SS / PBCH block used by the UE for acquiring MIB.

[0081] h b，f，c (i, l) is the SRS power control adjustment state for the active UL BWP of the carrier f for the serving cell c in the SRS transmission opportunity i. The setting of the SRS power control adjustment state (e.g., srs-PowerControlAdjustmentStates) is the current PUSCH power control adjustment state f b，f，c (i, l) in case the setting of the SRS power control adjustment state represents the same power control adjustment state for the SRS transmission and the PUSCH transmission. On the other hand, in case the setting of the SRS power control adjustment state represents independent power control adjustment states for the SRS transmission and the PUSCH transmission, and the setting of the TPC accumulation is not provided, the SRS power control adjustment state h b，f，c(i) can also be represented by formula (6).

[0082] [mathematical formula 6]

[0083]

[0084] Here, δ SRS，b，f，c (m) can also be a TPC command value encoded in combination with other TPC commands within a PDCCH having DCI (e.g., DCI format 2_3). may also be the sum of TPC commands within the active UL BWP b of the carrier f of the serving cell c and the subcarrier spacing μ at the SRS transmission occasion i-i0. SRS (i-i0)-1 symbols before the K SRS (i) symbols before the SRS transmission occasion i. i ) received by the UE. Here i0may also be the K i (i-i0)-1 symbols before the K SRS (i) symbols before the SRS transmission occasion i. SRS (i) the smallest positive integer that is earlier than the K

[0085] In the case where the SRS transmission is aperiodic, K SRS (i) can also be the number of symbols in the active UL BWP b of the carrier f of the serving cell c that is later than the last symbol of the corresponding PDCCH that triggers the SRS transmission and earlier than the first symbol of the SRS transmission. In the case where the SRS transmission is semi-persistent or periodic, K SRS (i) can also be K SRS,min that is equal to the product of the number of symbols N symb slot in the active UL BWP b of the carrier f of the serving cell c and the minimum value of the values provided by k2 within PUSCH common structure information (PUSCH-ConfigCommon).

[0086] In addition, the formulas (5), (6) are merely examples, but are not limited thereto. The user terminal can control the transmission power of the SRS based on at least one parameter exemplified in the formulas (5), (6), can include an additional parameter, or can omit a part of the parameters. Furthermore, in the above formulas (5), (6), the transmission power of the SRS is controlled per BWP of a certain carrier of a certain cell, but is not limited thereto. At least one of the cell, the carrier, the BWP, and the power control adjustment state can be omitted.

[0087] (TCI, spatial relation, QCL)

[0088] In NR, it is under study to control at least one of reception processing (e.g., at least one of reception, demapping, demodulation, decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, coding) in a UE of a signal / channel based on a transmission configuration indication state (TCI state).

[0089] The TCI state can also mean a state applied to a signal / channel of a downlink. A state equivalent to the TCI state applied to a signal / channel of an uplink can also be expressed as a spatial relation.

[0090] The TCI state refers to information related to quasi-co-location (QCL) of a signal / channel, and can also be referred to as a spatial reception parameter, spatial relation information, etc. The TCI state can also be set to the UE per channel or per signal.

[0091] The QCL is an index indicating a statistical property of a signal / channel. For example, in the case where a certain signal / channel and another signal / channel are in a QCL relationship, it means that at least one of a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial parameter (e.g., a spatial Rx parameter) can be assumed to be the same among the different plurality of signals / channels (at least one of these is QCL).

[0092] In addition, the spatial reception parameter can also correspond to a receive beam (e.g., a receive analog beam) of the UE, and can also be determined based on a spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure can also be interpreted as an sQCL (spatial QCL).

[0093] The QCL can also define multiple types (QCL types). For example, four different QCL types A-D can also be set for which the same parameters (or parameter sets) can be assumed, and hereinafter, for the parameters (which can also be referred to as QCL parameters), the following is indicated:

[0094] • QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread,

[0095] • QCL Type B (QCL-B): Doppler shift and Doppler spread,

[0096] • QCL Type C (QCL-C): Doppler shift and average delay,

[0097] • QCL Type D (QCL-D): Spatial reception parameter.

[0098] The UE can also be referred to as a QCL assumption that a particular control resource set (Control Resource Set (CORESET)), channel, or reference signal has a particular QCL (e.g., QCL Type D) relationship with other CORESETs, channels, or reference signals.

[0099] The UE can also determine at least one of a transmission beam (Tx beam) and a reception beam (Rx beam) of the signal / channel based on the TCI state or QCL assumption of the signal / channel.

[0100] The TCI state can also be information related to the QCL of the channel (in other words, the reference signal (Reference Signal (RS)) for the channel) that is the object and other signals (e.g., other RSs), for example. The TCI state can also be set (indicated) through higher layer signaling, physical layer signaling, or a combination of these.

[0101] In the present disclosure, the higher layer signaling can also be any one of, or a combination of, radio resource control (Radio Resource Control (RRC)) signaling, medium access control (Medium Access Control (MAC)) signaling, broadcast information, and the like, for example.

[0102] MAC signaling, for example, can also use a MAC control element (MAC CE), a MAC protocol data unit (PDU), and the like. Broadcast information, for example, can also be a master information block (MIB), a system information block (SIB), remaining minimum system information (RMSI), other system information (OSI), and the like.

[0103] Physical layer signaling, for example, can also be downlink control information (DCI).

[0104] A channel for which a TCI state or a spatial relation is configured (specified), for example, can also be at least one of a downlink shared channel (PDSCH), a downlink control channel (PDCCH), an uplink shared channel (PUSCH), and an uplink control channel (PUCCH).

[0105] Furthermore, an RS that is in a QCL relationship with the channel, for example, can also be at least one of an SSB, a CSI-RS, a measurement reference signal (SRS), a CSI-RS for tracking (also referred to as a TRS), and a QCL detection reference signal (also referred to as a QRS).

[0106] The SSB is a signal block including at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB can also be referred to as an SS / PBCH block.

[0107] The UE can also receive, through higher layer signaling, configuration information of a list of information elements including a TCI state (e.g., PDSCH-Config, tci-StatesToAddModList).

[0108] The information element of the TCI state configured through the higher layer signaling (RRC "TCI-state IE") can also include a TCI state ID, one or more QCL information ("QCL-Info"). The QCL information can also include at least one of information about an RS in a QCL relationship (RS relationship information) and information indicating a QCL type (QCL type information). The RS relationship information can also include information such as an index of an RS (e.g., an SSB index, a Non-Zero-Power (NZP) CSI-RS resource ID), an index of a cell where the RS is located, an index of a Bandwidth Part (BWP) where the RS is located, etc.

[0109] In Rel. 15 NR, as the TCI state of at least one of the PDCCH and the PDSCH, both the RS of QCL Type A and the RS of QCL Type D, or only the RS of QCL Type A can be configured to the UE.

[0110] In the case where the TRS is configured as the RS of QCL Type A, the TRS assumes that the same TRS is periodically transmitted for a long time, unlike a DeModulation Reference Signal (DMRS) of the PDCCH or the PDSCH. The UE can measure the TRS and calculate an average delay, a delay spread, etc.

[0111] In the TCI state of the DMRS of the PDCCH or the PDSCH, the RS configured as the QCL Type A of the TRS can be assumed by the UE to have the same QCL Type A parameters (average delay, delay spread, etc.) as the DMRS of the PDCCH or the PDSCH, and thus the Type A parameters (average delay, delay spread, etc.) of the DMRS of the PDCCH or the PDSCH can be derived from the measurement result of the TRS. The UE can use the measurement result of the TRS to perform more accurate channel estimation when performing channel estimation of at least one of the PDCCH and the PDSCH.

[0112] The UE configured with the RS of the QCL Type D can use the RS of the QCL Type D to determine the UE receive beam (spatial domain receive filter, UE spatial domain receive filter).

[0113] The RS of the QCL Type X of the TCI state can also mean the RS having the QCL Type X relationship with the (DMRS of the) certain channel / signal, and the RS can also be referred to as the QCL source of the QCL Type X of the TCI state.

[0114] TCI State for PDCCH

[0115] The information related to the QCL of the PDCCH (or the DMRS antenna port associated with the PDCCH) and a certain RS can also be referred to as the TCI state for PDCCH, etc.

[0116] The UE can also determine the TCI state for the UE-specific PDCCH (CORESET) based on higher layer signaling. For example, for the UE, one or more (K) TCI states can be configured per CORESET by RRC signaling.

[0117] The UE can also activate one of the multiple TCI states configured by RRC signaling for each CORESET by a MAC CE. The MAC CE can also be referred to as the TCI state indication MAC CE for UE-specific PDCCH (TCI State Indication for UE-specific PDCCH MAC CE). The UE can also perform monitoring of the CORESET based on the activated TCI state corresponding to the CORESET.

[0118] TCI State for PDSCH

[0119] The information related to the QCL of the PDSCH (or the DMRS antenna port associated with the PDSCH) and a certain DL-RS can also be referred to as the TCI state for PDSCH, etc.

[0120] The UE can also be notified (configured) of M (M≥1) TCI states (M pieces of QCL information for PDSCH) for PDSCH by higher layer signaling. In addition, the number M of TCI states configured to the UE can also be limited by at least one of the UE capability and the QCL type.

[0121] The DCI used in the scheduling of PDSCH can also include a specific field (for example, can also be referred to as a TCI field, a TCI state field, etc.) indicating the TCI state for the PDSCH. The DCI can also be used in the scheduling of PDSCH of one cell, for example, can also be referred to as DL DCI, DL assignment, DCI format 1_0, DCI format 1_1, etc.

[0122] Whether the TCI field is included in the DCI can also be controlled by information notified from the base station to the UE. The information can also be information indicating the presence or absence of the TCI field within the DCI (for example, TCI presence information, TCI presence information within DCI, higher layer parameter TCI-PresentInDCI). The information can also be configured to the UE, for example, by higher layer signaling.

[0123] In a case where more than 8 TCI states are configured to the UE, 8 or less TCI states can also be activated (or specified) using a MAC CE. The MAC CE can also be referred to as a TCI state activation / deactivation MAC CE for UE-specific PDSCH (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field within the DCI can also indicate one of the TCI states activated by the MAC CE.

[0124] In a case where the UE is configured with TCI presence information for a CORESET (CORESET used in the transmission of a PDCCH scheduling a PDSCH) set to "valid (enabled)", the UE can also assume that the TCI field is present within the DCI format 1_1 of the PDCCH transmitted on the CORESET.

[0125] In a case where a CORESET for scheduling a PDSCH is not set with TCI present information, or the PDSCH is scheduled by DCI format 1_0, in a case where a time offset between reception of a DL DCI (DCI scheduling the PDSCH) and reception of a PDSCH corresponding to the DCI is above a threshold, the UE can also assume that, for deciding QCL of a PDSCH antenna port, a TCI state or QCL assumption for the PDSCH is the same as a TCI state or QCL assumption applied to a CORESET used in PDCCH transmission scheduling the PDSCH.

[0126] In a case where TCI present information is set to "enabled", a TCI field in a DCI within a component carrier (CC) for scheduling a PDSCH indicates an activated TCI state within a scheduled CC or DL BWP, and the PDSCH is scheduled by DCI format 1_1, the UE can also use a TCI with the DCI and according to a value of the TCI field in a detected PDCCH for deciding QCL of a PDSCH antenna port. In a case where a time offset between reception of a DL DCI (scheduling the PDSCH) and a PDSCH (scheduled by the DCI) corresponding to the DCI is above a threshold, the UE can also assume that a DM-RS port of the PDSCH of a serving cell is QCLed with an RS within a TCI state given by an indicated TCI state.

[0127] In a case where a UE is configured with a single-slot PDSCH, an indicated TCI state can also be based on an activated TCI state within a slot with a scheduled PDSCH. In a case where a UE is configured with a multi-slot PDSCH, an indicated TCI state can also be based on an activated TCI state within a first slot with a scheduled PDSCH, and the UE can also expect that the indicated TCI state is the same within slots with a scheduled PDSCH. In a case where a UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE is configured with TCI present information set to "enabled" for the CORESET, and at least one of TCI states set for a serving cell scheduled by the search space set contains a QCL Type D, the UE can also assume that a time offset between a detected PDCCH and a PDSCH corresponding to the PDCCH is above a threshold.

[0128] In the RRC connected mode, in both cases where the TCI information in DCI (the higher layer parameter TCI-PresentInDCI) is set to "valid (enabled)" and where the TCI information in DCI is not set, in the case where the time offset between the reception of the DL DCI (the DCI scheduling the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than a threshold, the UE can also assume that the DM-RS ports of the PDSCH of the serving cell are QCLed with the RS that is the QCL parameter used in the QCL indication of the PDCCH of the CORESET that has the smallest (lowest) CORESET-ID in the latest (most recent, latest) slot monitored by the UE within the active BWP of the serving cell and that is associated with the monitored search space Figure 1 ). This RS can also be referred to as the default TCI state of the PDSCH or the default QCL assumption of the PDSCH.

[0129] The time offset between the reception of the DL DCI and the reception of the PDSCH corresponding to the DCI can also be referred to as the scheduling offset.

[0130] Furthermore, the above-mentioned threshold can also be referred to as the time duration for QCL, "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, and the like.

[0131] The time duration for QCL can also be based on the UE capability, for example, can also be based on the time delay required for the decoding of the PDCCH and the beam switching. The time duration for QCL can also be the minimum time required by the UE for the reception of the PDCCH and the application of the spatial QCL information received in the DCI for the PDSCH processing. The time duration for QCL can be represented by the number of symbols per subcarrier spacing, or can be represented by time (e.g., μs). The information of the time duration for QCL can be reported from the UE to the base station as the UE capability information, or can be set to the UE from the base station using the higher layer signaling.

[0132] For example, the UE can also assume that the DMRS port of the PDSCH described above is QCL with the DL-RS based on the TCI state activated for the CORESET corresponding to the minimum CORESET-ID described above. The latest slot can also be, for example, the slot in which the DCI that schedules the PDSCH described above is received.

[0133] In addition, the CORESET-ID can also be an ID (an ID for identification of the CORESET, controlResourceSetId) set by the RRC information element "Control Resource Set".

[0134] In a case where no CORESET is set in the CC, the default TCI state can also be an activated TCI state that can be applied in the PDSCH within the activated DL BWP of the CC and that has the lowest ID.

[0135] In Rel. 16, in a case where the PDSCH and the PDCCH that schedules it are within different component carriers (cross-carrier scheduling), in a case where the PDCCH-to-PDSCH delay is shorter than the time length for QCL, or in a case where no TCI state is included in the DCI for the scheduling, the UE can also acquire a QCL assumption for the scheduled PDSCH from the activated TCI state with the lowest ID that can be applied in the PDSCH within the activated BWP of the cell being scheduled.

[0136] <Spatial relation for PUCCH>

[0137] The UE can also be set by higher layer signaling (for example, Radio Resource Control (RRC) signaling) with parameters used in PUCCH transmission (PUCCH configuration information, PUCCH-Config). The PUCCH configuration information can also be set for each part bandwidth (for example, Bandwidth Part (BWP)) within a carrier (also referred to as a cell, component carrier (Component Carrier (CC))).

[0138] The PUCCH configuration information can also include a list of PUCCH resource set information (for example, PUCCH-ResourceSet) and a list of PUCCH spatial relation information (for example, PUCCH-SpatialRelationInfo).

[0139] The PUCCH resource set information can also contain a list (e.g., resourceList) of PUCCH resource indices (IDs, e.g., PUCCH-ResourceId).

[0140] Further, in a case where the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided through the PUCCH resource set information within the PUCCH configuration information (before RRC setup), the UE can also determine a PUCCH resource set based on a parameter (e.g., pucch-ResourceCommon) within system information (e.g., System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)). The PUCCH resource set can also contain 16 PUCCH resources.

[0141] On the other hand, in a case where the UE has the above-described dedicated PUCCH resource configuration information (UE-dedicated uplink control channel configuration, dedicated PUCCH resource configuration) (after RRC setup), the UE can also determine a PUCCH resource set according to the number of UCI information bits.

[0142] The UE can also determine one PUCCH resource (index) within the above-described PUCCH resource set (e.g., cell-specific or UE-dedicatedly determined PUCCH resource set) based on at least one of a value of a specific field (e.g., PUCCH resource indicator field) within downlink control information (Downlink Control Information (DCI)) (e.g., DCI format 1_0 or 1_1 used in scheduling of PDSCH), a number of CCEs (N CCE ) within a control resource set (COntrol REsource SET (CORESET)) for PDCCH reception carrying the DCI, CCE，0 an index (n ) of a starting (first) CCE of the PDCCH reception.

[0143] PUCCH spatial relation information (e.g., the "PUCCH-spatialRelationInfo" in the RRC information element) may also indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. PUCCH spatial relation information may also indicate the spatial association between RS (reference signal) and PUCCH.

[0144] The list of PUCCH spatial relationship information may also include several elements (PUCCH spatial relationship information IE (Information Element)). Each PUCCH spatial relationship information may also include, for example, at least one of the PUCCH spatial relationship information index (ID, e.g., pucch-SpatialRelationInfoId), the serving cell index (ID, e.g., servingCellId), and information related to the RS with which the PUCCH forms a spatial relationship (reference RS).

[0145] For example, the information related to the RS may be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), an SRS resource ID, and a BWP ID. The SSB index, CSI-RS index, and SRS resource ID may also be associated with at least one of a beam, a resource, and a port selected by measuring the corresponding RS.

[0146] When more than one PUCCH-related spatial relation information is set, the UE may also perform control based on the PUCCH spatial relation activation / deactivation MAC CE so that one PUCCH spatial relation information becomes active for one PUCCH resource at a certain time.

[0147] The PUCCH spatial relationship activation / deactivation MAC CE of Rel.15NR is expressed by a total of three octets (8 bits×3=24 bits) of octets (Octet, Oct) 1-3.

[0148] The MAC CE may also include information such as the serving cell ID ("Serving Cell ID" field), BWPID ("BWPID" field), and PUCCH resource ID ("PUCCH Resource ID" field) of the application object.

[0149] In addition, the MAC CE contains "S i ”(i=0-7) field. In a certain Si In case the field indicates 1, the UE activates the spatial relation information of the spatial relation information ID #i. In case the field indicates 0, the UE deactivates the spatial relation information of the spatial relation information ID #i. i In case the field indicates 0, the UE deactivates the spatial relation information of the spatial relation information ID #i.

[0150] The UE can also activate the PUCCH relation information designated by the MAC CE after 3 ms from transmitting a positive response (ACK) to the MAC CE for activating specific PUCCH spatial relation information.

[0151] <Space relation for SRS, PUSCH>

[0152] The UE can also receive information (SRS configuration information, for example, parameters within "SRS-Config" of an RRC control element) used in transmission of a measurement reference signal (for example, a sounding reference signal (SRS)).

[0153] Specifically, the UE can also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of an RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of an RRC control element).

[0154] One SRS resource set can also be associated with a specific number of SRS resources (and the specific number of SRS resources can also be grouped). Each SRS resource can also be determined by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0155] The SRS resource set information can also include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on the usage of the SRS.

[0156] Here, the SRS resource type can also indicate any one of a periodic SRS (P-SRS), a semi-persistent SRS (SP-SRS), and an aperiodic SRS (A-SRS, AP-SRS). In addition, the UE can periodically (or periodically after activation) transmit the P-SRS and the SP-SRS, and transmit the A-SRS based on a DCI-based SRS request.

[0157] Further, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") can be, for example, beamManagement, codebook (CB)-based transmission, nonCodebook (NCB)-based transmission, antennaSwitching, etc. The SRS of the usage of the codebook-based transmission or the nonCodebook-based transmission can also be used in the determination of the precoder for the SRI-based codebook-based or nonCodebook-based PUSCH transmission.

[0158] For example, the UE can determine the precoder for the PUSCH transmission based on the SRI, a transmitted rank indicator (TRI), and a transmitted precoding matrix indicator (TPMI) in the case of the codebook-based transmission. The UE can determine the precoder for the PUSCH transmission based on the SRI in the case of the nonCodebook-based transmission.

[0159] The SRS resource information can include an SRS resource ID (SRS-ResourceId), an SRS port number, a SRS port number, a transmission Comb, SRS resource mapping (for example, a time and / or frequency resource location, a resource offset, a period of a resource, a repetition number, a SRS symbol number, a SRS bandwidth, etc.), hop association information, an SRS resource type, a sequence ID, spatial relation information of the SRS, etc.

[0160] The spatial relation information of the SRS (for example, "spatialRelationInfo" of the RRC information element) can also indicate the spatial relation information between the specific reference signal and the SRS. The specific reference signal can also be at least one of a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel (SS / PBCH)) block, a Channel State Information Reference Signal (CSI-RS), and an SRS (for example, another SRS). The SS / PBCH block can also be referred to as a synchronization signal block (SSB).

[0161] The spatial relation information of the SRS can also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the above-described specific reference signal.

[0162] In addition, in the present disclosure, an SSB index, an SSB resource ID, and an SSBRI (SSB Resource Indicator) can also be replaced with each other. Furthermore, a CSI-RS index, a CSI-RS resource ID, and a CRI (CSI-RS Resource Indicator) can also be replaced with each other. Furthermore, an SRS index, an SRS resource ID, and an SRI can also be replaced with each other.

[0163] The spatial relation information of the SRS can also include a serving cell index, a BWP index (BWP ID), and the like corresponding to the above-described specific reference signal.

[0164] In NR, the transmission of an uplink signal can also be controlled based on whether there is beam correspondence (BC). The BC can also mean, for example, the ability of a certain node (for example, a base station or a UE) to decide a beam (a transmission beam, a Tx beam) used in the transmission of a signal based on a beam (a reception beam, an Rx beam) used in the reception of the signal.

[0165] In addition, BC can also be referred to as Tx / Rx beam correspondence, beam reciprocity, beam calibration, calibrated / non-calibrated, reciprocity calibrated / non-calibrated, correspondence, consistency, and the like.

[0166] For example, in the case of no BC, the UE can also transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, and the like) using the same beam (spatial domain transmission filter) as the SRS (or SRS resource) indicated from the base station based on the measurement result of more than one SRS (or SRS resource).

[0167] On the other hand, in the case of BC, the UE can also transmit an uplink signal (e.g., PUSCH, PUCCH, SRS, and the like) using the same or corresponding beam (spatial domain transmission filter) as the beam (spatial domain reception filter) used in the reception of a specific SSB or CSI-RS.

[0168] In the case where spatial relation information related to SSB or CSI-RS and SRS is set for a certain SRS resource (e.g., in the case of BC), the UE can also transmit the SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain reception filter) used for the reception of the SSB or CSI-RS. In this case, the UE can also assume that the UE reception beam of the SSB or CSI-RS is the same as the UE transmission beam of the SRS.

[0169] In the case where spatial relation information related to other SRS (reference SRS) and the SRS (target SRS) is set for a certain SRS (target SRS) resource (e.g., in the case of no BC), the UE can also transmit the target SRS resource using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for the transmission of the reference SRS. That is, in this case, the UE can also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0170] The UE can also decide the spatial relation of the PUSCH scheduled by the DCI (e.g., DCI format 0_1) based on the value of a specific field (e.g., SRS resource indicator (SRI) field) within the DCI. Specifically, the UE can also use the spatial relation information (e.g., “spatialRelationInfo” of an RRC information element) of the SRS resource decided based on the value of the specific field (e.g., SRI) in the PUSCH transmission.

[0171] In the case of using codebook-based transmission for the PUSCH, the UE can also be configured with two SRS resources through RRC and be instructed with one of the two SRS resources through DCI (one bit of the specific field). In the case of using non-codebook-based transmission for the PUSCH, the UE can also be configured with four SRS resources through RRC and be instructed with one of the four SRS resources through DCI (two bits of the specific field). In order to use a spatial relation other than the two or four spatial relations configured through RRC, RRC reconfiguration is required.

[0172] In addition, the spatial relation of the SRS resource used in the PUSCH can be configured with a DL-RS. For example, for SP-SRS, the UE can be configured with the spatial relation of multiple (e.g., up to 16) SRS resources through RRC and be instructed with one of the multiple SRS resources through MAC CE.

[0173] (Default spatial relation)

[0174] A default spatial relation is under investigation. Within a certain frequency range (e.g., frequency range (FR) 2), in the case where spatial relation information for a dedicated PUCCH (PUCCH configured by dedicated PUCCH configuration (PUCCH-Config)) or a dedicated SRS (SRS based on dedicated SRS configuration (SRS-Config)) is not configured except for SRS with a beam management usage (usage='beamManagement'), the default spatial relation can also be applied at least in a certain situation for the dedicated PUCCH configuration or the dedicated SRS configuration. The certain situation can also be a situation where a path loss reference RS is not configured through RRC signaling.

[0175] For example, in the case where a CORESET is configured on a CC, the default spatial relation can also be the TCI state or the QCL assumption of the CORESET with the lowest ID. The RS used in path loss calculation can also be the same QCL type D RS as the TCI state or the QCL assumption of the CORESET with the lowest ID. The RS used in path loss calculation can also be a periodic RS.

[0176] For example, in a case where no CORESET is also configured on the CC, the default spatial relation can also be the activated TCI state with the lowest ID that can be applied in PDSCH within the active DL-BWP of the CC.

[0177] The default spatial relation can also be applied to a UE that supports beam correlation. The default spatial relation can also be applied to a single-TRP case.

[0178] In a case where no pathloss reference RS is configured, the RS used in pathloss calculation can also be referred to as a default pathloss reference RS.

[0179] (Spatial relation for PUSCH scheduled by DCI format 0_0)

[0180] In Rel. 15 NR, for PUSCH on a cell scheduled by DCI format 0_0, the UE transmits the PUSCH according to the spatial relation corresponding to the dedicated PUCCH resource with the lowest ID within the active UL BWP of the cell, if available. The dedicated PUCCH resource can be a PUCCH resource configured by the UE specifically (configured by higher layer parameter PUCCH-Config).

[0181] DCI format 0_1 contains SRI, but DCI format 0_0 does not contain SRI.

[0182] Therefore, for a cell (e.g., secondary cell (SCell)) for which no PUCCH resource is configured, PUSCH cannot be scheduled by DCI format 0_0.

[0183] In a case where PUCCH on SCell (PUCCH transmitted on SCell) is not configured, UCI is transmitted on PCell. In a case where PUCCH on SCell is configured, UCI is transmitted on PUCCH-SCell. Therefore, PUCCH resource and spatial relation information do not need to be configured on all SCells, and there can be a cell for which no PUCCH resource is configured.

[0184] In addition, DCI format 0_1 contains a carrier indicator (carrier indicator field (CIF)), but DCI format 0_0 does not contain CIF. Therefore, even if PUCCH resource is configured for PCell, cross-carrier scheduling of PUSCH on SCell by DCI format 0_0 on PCell is not possible.

[0185] In Rel. 15 NR, RRC connected mode, frequency range (FR) 2, a UE is not configured with PUCCH resources with PUCCH spatial relation information, and a PUSCH scheduled by a DCI format 0_0 within a BWP is not expected.

[0186] For a PUSCH scheduled by a DCI format 0_0, the following functions 1, 2 are under study.

[0187] [Function 1]

[0188] In FR2 and RRC connected mode, in a case where no PUCCH resource is configured on a CC, a default spatial relation and a default path loss reference RS for a PUSCH scheduled by a DCI format 0_0 are supported. This function 1 can be applied to a UE that supports a function of a default spatial relation for a dedicated PUCCH or a dedicated SRS in Rel. 16, and to a case where a UE that supports a function of a default spatial relation for a dedicated PUCCH or a dedicated SRS in Rel. 16 is configured by a base station.

[0189] An RRC parameter that activates a function of a default spatial relation for a dedicated PUCCH or a dedicated SRS can also be introduced. The default spatial relation can also be a TCI state or a QCL assumption of a CORESET with a lowest ID. The default path loss reference RS can also be a QCL type D RS that is the same as the TCI state or the QCL assumption of the CORESET with the lowest ID. The default path loss reference RS can also be a periodic RS.

[0190] [Function 2]

[0191] In FR2 and RRC connected mode, a PUSCH is supported to be scheduled by a DCI format 0_0 on a CC with configured PUCCH resources. Here, all the configured PUCCH resources are configured without a spatial relation.

[0192] For a PUSCH scheduled by a DCI format 0_0, a spatial relation and a path loss reference RS can also follow those for a PUCCH resource, respectively. For a PUSCH scheduled by a DCI format 0_0, a spatial relation and a path loss reference RS for a PUCCH resource can also be a default spatial relation and a default path loss reference RS for a PUCCH resource, respectively.

[0193] Function 1 handles a case where a PUCCH resource is not configured, and function 2 handles a case where a PUCCH resource is configured and a spatial relation is not configured. The object cell (CC) of function 2 is a PCell or a PUCCH-SCell, and it is assumed that a PUCCH resource is configured. In the case of function where the network uses a default spatial relation, a case where a spatial relation is not configured for a PUCCH resource is considered. The object cell of function 1 is a cell other than a PCell and a PUCCH-SCell, and a PUCCH resource is not configured.

[0194] (Point of Question)

[0195] A case where a spatial relation is not configured for a part of a plurality of PUCCH resources configured is considered. As described above, in Rel. 15 NR, since a spatial relation using the lowest PUCCH resource ID is used, the spatial relation in this case is not clear. In addition, which PUCCH resource within a cell is used is not clear. If the spatial relation is not clear, it is possible to cause a decrease in throughput and a decrease in system performance and the like.

[0196] In a case where a path loss reference RS is not configured and no CORESET is configured on a CC, an RS used in path loss calculation is not clear. If the RS used in path loss calculation is not clear, it is possible to cause a decrease in throughput and a decrease in system performance and the like.

[0197] Therefore, the present inventors and the like conceived a method of appropriately deciding a reference signal for at least one of QCL and path loss calculation for uplink transmission.

[0198] Hereinafter, with reference to the drawings, embodiments related to the present disclosure will be described in detail. The wireless communication method related to each embodiment can be applied individually or in combination.

[0199] In the present disclosure, a cell, a CC, a carrier, a BWP, and a frequency band can be replaced with each other.

[0200] In the present disclosure, an index, an ID, an indicator, and a resource ID can be replaced with each other.

[0201] In the present disclosure, a specific UL transmission, a specific UL signal, a specific type of UL transmission, a specific UL channel, a PUSCH, a PUCCH, an SRS, a P-SRS, an SP-SRS, and an A-SRS can be replaced with each other. In the present disclosure, a specific DL signal, a specific DL resource, a specific type of DL transmission, a specific DL transmission, a specific DL reception, a specific DL channel, a PDSCH, a PDCCH, a CORESET, a DL-RS, an SSB, and a CSI-RS can be replaced with each other.

[0202] TCI state, TCI state or QCL assumption, QCL assumption, QCL parameter, spatial domain reception filter, UE spatial domain reception filter, spatial domain filter, UE reception beam, DL reception beam, DL precoding, DL precoder, DL-RS, RS of QCL Type D of TCI state or QCL assumption, RS of QCL Type A of TCI state or QCL assumption can also be replaced with each other. RS of QCL Type D, DL-RS associated with QCL Type D, DL-RS with QCL Type D, source of DL-RS, SSB, CSI-RS can also be replaced with each other.

[0203] In the disclosure, TCI state can also be information related to reception beam (spatial domain reception filter) indicated (set) to UE (for example, DL-RS, QCL type, cell of transmitted DL-RS, etc.). QCL assumption can also be information related to reception beam (spatial domain reception filter) assumed by UE based on transmission or reception of associated signal (for example, PRACH) (for example, DL-RS, QCL type, cell of transmitted DL-RS, etc.).

[0204] In the disclosure, the latest slot, the most recent slot, the latest search space, the most recent search space can also be replaced with each other. In the disclosure, lowest ID, highest ID, specific (determined) ID can also be replaced with each other. For example, CORESET with lowest ID, CORESET with highest ID, CORESET with specific ID can also be replaced with each other. For example, activated TCI state with lowest ID, activated TCI state with highest ID, activated TCI state with specific ID can also be replaced with each other.

[0205] In the disclosure, spatial relation, spatial relation information, spatial relation assumption, QCL parameter, spatial domain transmission filter, UE spatial domain transmission filter, spatial domain filter, UE transmission beam, UL transmission beam, UL precoding, UL precoder, RS of spatial relation, DL-RS, QCL assumption, SRI, SRI-based spatial relation, UL TCI can also be replaced with each other.

[0206] In the present disclosure, the default TCI state, the default QCL, the default QCL assumption can also be replaced with each other. Hereinafter, the TCI state or the QCL (QCL assumption) is mainly described as the default TCI state, but the name is not limited thereto. In addition, the definition of the default TCI state is not limited thereto. The default TCI state can be, for example, for a certain channel / signal (e.g., PDSCH), a TCI state assumed to be a case where the TCI state / QCL cannot be utilized by the TCI state / QCL specified by the DCI, or a TCI state assumed to be a case where the TCI state / QCL is not specified (or set).

[0207] In the present disclosure, the default spatial relation, the default spatial relation assumption, the RS of the QCL of the specific DL resource, the TCI state or the QCL assumption of the specific DL resource, the TCI state or the QCL assumption of the specific DL signal, the RS related to the QCL parameter given by the TCI state or the QCL assumption of the specific DL signal, the RS of the QCL Type D in the TCI state or the QCL assumption of the specific DL signal, the spatial relation of the reference UL transmission can also be replaced with each other.

[0208] In the present disclosure, the TRS, the CSI-RS for tracking, the CSI-RS having the TRS information (higher layer parameter trs-Info), the NZP-CSI-RS resource within the NZP-CSI-RS resource set having the TRS information can also be replaced with each other.

[0209] In the present disclosure, the DCI format 0_0, the DCI not containing the SRI, the DCI not containing the indication of the spatial relation, the DCI not containing the CIF can also be replaced with each other. In the present disclosure, the DCI format 0_1, the DCI containing the SRI, the DCI containing the indication of the spatial relation, the DCI containing the CIF can also be replaced with each other.

[0210] In the present disclosure, the path loss reference RS, the RS for path loss reference, the RS for path loss estimation, the RS for path loss calculation, the path loss (PL)-RS, the index q d , the RS used in the path loss calculation, the RS resource used in the path loss calculation, the calculation RS can also be replaced with each other. The calculation, the estimation, the measurement can also be replaced with each other.

[0211] In the present disclosure, the "UE transmits the specific UL transmission in the default spatial relation", "the UE uses the default spatial relation in the spatial relation of the specific UL transmission", "the UE assumes (considers) that the spatial relation of the specific UL transmission is the same as the RS of the default spatial relation", "the UE assumes (considers) that the spatial relation of the specific UL transmission is the same as the RS of the QCL Type D of the default spatial relation" can also be replaced with each other.

[0212] (Wireless communication method)

[0213] Default spatial relation application condition

[0214] In case the default spatial relation application condition is met, the UE can also apply the default spatial relation in the spatial relation of a specific UL transmission. The specific UL transmission can also be at least one of PUSCH, PUCCH, SRS, P-SRS, SP-SRS, A-SRS.

[0215] The default spatial relation application condition can be derived by logical OR of multiple default spatial relation application conditions, by logical AND of multiple default spatial relation application conditions, or by a combination of logical OR and logical AND of multiple default spatial relation application conditions.

[0216] The specific UL transmission can be an UL transmission of a dedicated PUCCH configuration or a dedicated SRS configuration other than SRS with beam management usage (usage = 'beamManagement') and SRS with non-codebook based transmission usage (usage = 'nonCodebook') including a configuration with associated CSI-RS (associatedCSI-RS) within a specific frequency range (e.g., frequency range (FR) 2). The specific UL transmission can also be PUSCH scheduled by DCI format 0_0. For example, the specific UL transmission can also be PUSCH on a cell scheduled by DCI format 0_0 in case of a PUCCH resource (e.g., dedicated PUCCH resource) without a configured spatial relation (e.g., active spatial relation) within an active UL BWP of the cell. The specific UL transmission can also be SRS based on multiple slots of SRS resources within an SRS resource set with antenna switching usage (usage = 'antennaSwitching').

[0217] The default spatial relation application condition can also include at least one of the spatial relation information not being set for a specific UL transmission, the specific UL transmission being within a frequency range (e.g., frequency range (FR) 2), the specific UL transmission being based on SRS other than SRS with usage of 'beamManagement' and SRS with usage of 'nonCodebook' including a configured based on non-codebook transmission with an associated CSI-RS (associatedCSI-RS), and the UE supporting beam correlation. The spatial relation information for the specific UL transmission can also be the spatial relation information within a dedicated PUCCH configuration or a dedicated SRS configuration. The associated CSI-RS can also be an ID (index) of a CSI-RS resource associated with a SRS resource set in the non-codebook based transmission.

[0218] The default spatial relation application condition can also include a path loss reference RS not being set for a specific UL transmission. The default spatial relation application condition can also include a path loss reference RS not being set for a specific UL transmission by higher layer signaling.

[0219] The default spatial relation application condition can also include only one TCI state being activated for PDCCH (a number of activated TCI states for PDCCH being 1). According to this default spatial relation application condition, UE operation becomes simple.

[0220] The default spatial relation application condition can also include only one TCI state being activated for PDCCH and PDSCH (a number of activated TCI states for PDCCH and PDSCH being 1). In a case of using a single activated beam for UL and DL, UE operation becomes simple.

[0221] The default spatial relation application condition can also include PDCCH, PUCCH scheduled by the PDCCH being in a same BWP or a same CC (cross-carrier scheduling not being used). In a case of cross-carrier scheduling, a UE is not limited to being able to apply the same beam in PDCCH and PUCCH, so by excluding cross-carrier scheduling, UE operation becomes simple. For example, consider a case of inter-band carrier aggregation (CA), different beams are applied in PDCCH and PUCCH. Also, for example, consider a case of FR1-FR2 CA, if DCI is in FR1, PUCCH or SRS or PUSCH is in FR2, the UE cannot decide a beam.

[0222] The default spatial relation application condition can also include no inter-band CA.

[0223] The default spatial relation application condition can also include no SRI for a specific UL transmission PUSCH. The default spatial relation application condition can also include no SRS resource corresponding to the SRI for the PUSCH.

[0224] The default spatial relation application condition can also include no spatial relation information being configured for at least one of the SRS resources within the SRS resource set.

[0225] The default spatial relation can also be a RS that is QCL of a specific DL resource. The RS that is QCL of a specific DL resource, the RS related to the QCL parameter of a specific DL resource, the RS for QCL of a specific DL resource, the RS for QCL Type D of a specific DL resource can also be mutually replaceable.

[0226] The RS of the default spatial relation can be either a RS of QCL Type D or a RS of QCL Type A, or if applicable, a RS of QCL Type D or a RS of QCL Type A.

[0227] The specific DL resource can also be a latest slot for a specific UL transmission. The latest slot can also be a latest slot for a starting symbol (or before that symbol) of a specific UL transmission. The latest slot can also be a latest slot for a (earlier than) a first or last symbol of a DL signal corresponding to the specific UL transmission. For example, in the case of the specific UL transmission being a PUCCH, the DL signal corresponding to the specific UL transmission can also be a PDSCH corresponding to the PUCCH (a PDSCH corresponding to a HARQ-ACK carried on the PUCCH).

[0228] In the case of no path loss reference signal (path loss reference RS) being configured for a specific uplink transmission (in the case of a default path loss reference RS application condition being satisfied for the specific uplink transmission), the UE can also determine a reference signal (e.g., a default path loss reference RS, a calculation RS) used in the calculation of the path loss and calculate the path loss based on at least one quasi co-location (QCL) parameter corresponding to at least one specific DL resource (e.g., a specific CORESET, a specific PDCCH, a specific SSB).

[0229] Default Spatial Relation

[0230] The default spatial relation can also be a RS that is QCL of a specific DL resource.

[0231] The RS related to the QCL parameter of the specific DL resource, the RS of the QCL of the specific DL resource, the default TCI state or the default QCL assumption of the specific DL resource, the TCI state of the CORESET with the lowest CORESET-ID in the latest slot, the RS related to the QCL parameter of the PDCCH used in the QCL indication of the CORESET associated with the monitored search space of the one or more CORESETs monitored by the UE in the active BWP of the serving cell in the latest slot, the TCI state or the QCL assumption of the CORESET with the lowest CORESET-ID in the latest slot and associated with the monitored search space, the TCI state or the QCL assumption of the CORESET with the lowest CORESET-ID in the specific slot and associated with the monitored search space, the TCI state or the QCL assumption of the specific CORESET, the TCI state or the QCL assumption of the DL signal corresponding to the specific UL transmission (e.g., the DL channel triggering the specific UL transmission, the DL channel scheduling the specific UL transmission, the DL channel scheduling the DL channel corresponding to the specific UL transmission), the RS related to the QCL parameter of the specific DL resource, and the RS of the QCL of the specific DL resource can also be replaced with each other.

[0232] The RS of the default spatial relation or the default TCI state or the default QCL assumption can be either the RS of QCL Type D or the RS of QCL Type A, or the RS of QCL Type D or the RS of QCL Type A if applicable.

[0233] The latest slot can also be the latest slot for the specific DL resource. The latest slot can also be the latest slot for the starting symbol (or the symbol before the symbol) of the specific UL transmission. The latest slot can also be the latest slot for the (earlier than) the first or the last symbol of the DL signal corresponding to the specific UL transmission. For example, in the case of the specific UL transmission being a PUCCH, the DL signal corresponding to the specific UL transmission can also be a PDSCH (a PDSCH corresponding to HARQ-ACK carried on the PUCCH) corresponding to the PUCCH.

[0234] The spatial relation of the specific UL transmission can also be the default QCL of the PDSCH.

[0235] In a case where a CORESET is not configured on a CC to which a default spatial relation is applied, a default QCL of a PDSCH can also be an activated TCI state that can be applied in the PDSCH of an active DL BWP of the CC and has a lowest ID.

[0236] The specific DL resource can also be a PDSCH.

[0237] The default spatial relation can also be one of activated TCI states of a CORESET.

[0238] For a CORESET, multiple TCI states can also be activated. In this case, an activated TCI state selected as a default spatial relation can be either a default RS or a default TCI state or a default QCL assumption.

[0239] The specific DL resource can also be a PDCCH.

[0240] In a case where a specific UL transmission corresponds to a PDCCH (aperiodic PDCCH or aperiodic SRS) (a case where a specific UL transmission is scheduled or triggered by a PDCCH (DL DCI) for scheduling of a PDSCH), a spatial relation of the specific UL transmission can also be a TCI state of the PDCCH. The specific UL transmission can be either an A-SRS triggered by the PDCCH or a PUCCH carrying HARQ-ACK for a PDSCH scheduled by the PDCCH. For example, in a case where the specific UL transmission is an A-SRS, the PDCCH corresponding to the specific UL transmission can also be a PDCCH triggering the A-SRS. Also, for example, in a case where the specific UL transmission is a PUCCH carrying HARQ-ACK, the PDCCH corresponding to the specific UL transmission can also be a PDCCH scheduling a PDSCH and indicating timing of HARQ-ACK for the PDSCH. In a case where the specific UL transmission does not correspond to a PDCCH, a spatial relation of the specific UL transmission can also be the same as A-1 described above.

[0241] The specific DL resource can also be a PDCCH or a PDSCH.

[0242] The default spatial relation can also be a QCL assumption of a CORESET #0 (a CORESET having an ID of 0).

[0243] The specific DL resource can also be a CORESET #0.

[0244] The spatial relation of the specific UL transmission can also be the RS used in the path loss calculation of Rel. 15 (the calculation RS of Rel. 15, the TCI state of the RS used in the path loss calculation). The RS used in the path loss calculation, the RS resource used in the path loss calculation, the calculation RS, the default path loss reference RS can also be replaced with each other.

[0245] The calculation RS can also be the RS resource derived from the SS / PBCH block used by the UE for acquiring the MIB.

[0246] The calculation RS can also be the path loss reference RS with index 0 within the path loss reference RS information (the list of path loss reference RSs). For example, in the case where the UE is given the path loss reference RS information (pathlossReferenceRSs within PUCCH-PowerControl) and is not given the PUCCH spatial relation information (PUCCH-SpatialRelationInfo), the calculation RS can also be the reference signal within the PUCCH path loss reference RS with index 0 within the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) within the PUCCH path loss reference RS information (PUCCH-PathlossReferenceRS) for PUCCH.

[0247] <Embodiment 1>

[0248] It can also be supported that the PUSCH is scheduled by the DCI format 0_0 on the CC with the set PUCCH resource. The PUCCH resource with the lowest ID among the set PUCCH resources can also not have a spatial relation (spatial relation information, PUCCH-SpatialRelationInfo) (the PUCCH resource with the lowest ID can also be set without accompanying a spatial relation).

[0249] In FR2 and in the RRC connected mode, it can also be supported that the PUSCH is scheduled by the DCI format 0_0 on the CC with the set PUCCH resource. The PUCCH resource with the lowest ID among the set PUCCH resources can also not have a spatial relation.

[0250] In FR2 and RRC connected mode, PUSCH scheduled by DCI format 0_0 can also be supported within the activated UL BWP of the CC with PUCCH resource set. The PUCCH resource with the lowest ID among the PUCCH resource set of the activated UL BWP can also not have a spatial relation.

[0251] The condition to support PUSCH scheduled by DCI format 0_0 can also include that the path loss reference RS for the PUSCH is not set.

[0252] The spatial relation for PUSCH scheduled by DCI format 0_0 can also follow the spatial relation or the default spatial relation for the PUCCH resource (e.g., the PUCCH resource with the lowest ID). The RS used in the path loss calculation for PUSCH scheduled by DCI format 0_0 can also follow the path loss reference RS or the default path loss reference RS for the PUCCH resource (e.g., the PUCCH resource with the lowest ID).

[0253] For example, as shown in FIG. 10, when the PUCCH resource with the lowest ID is set without spatial relation information (S10: Y), PUSCH can be scheduled by DCI format 0_0 (S20). When the PUCCH resource with the lowest ID is not set without spatial relation information (S10: N), PUSCH cannot be scheduled by DCI format 0_0 (S30). Figure 2

[0254] <Implementation Example 2>

[0255] In FR2 and RRC connected mode, the default spatial relation and the default path loss reference RS for PUSCH scheduled by DCI format 0_0 can be supported when the PUCCH resource is not set within the activated UL BWP of the CC. This function can be applied to a UE that supports the function of the default spatial relation for a dedicated PUCCH or a dedicated SRS in Rel. 16, and to a UE that is set by a base station to support the function of the default spatial relation for a dedicated PUCCH or a dedicated SRS in Rel. 16.

[0256] An RRC parameter that activates the function of the default spatial relation for a dedicated PUCCH or a dedicated SRS can also be introduced. The default spatial relation can be the TCI state or the QCL assumption of the CORESET with the lowest ID. The default path loss reference RS can be the same QCL Type D RS as the TCI state or the QCL assumption of the CORESET with the lowest ID. The default path loss reference RS can be a periodic RS.​

[0257] Embodiment 3

[0258] In FR2 and RRC connected mode, scheduling of PUSCH by DCI format 0_0 within the active UL BWP of a CC with configured PUCCH resources is supported. Here, all configured PUCCH resources within the active UL BWP are configured without spatial relation.

[0259] For PUSCH scheduled by DCI format 0_0, the spatial relation and pathloss reference RS can also follow those for PUCCH resources respectively. For PUSCH scheduled by DCI format 0_0, the spatial relation and pathloss reference RS for PUCCH resources can also be the default spatial relation and default pathloss reference RS for PUCCH resources respectively.

[0260] Embodiment 4

[0261] At least one of UE capability information indicating that the UE makes the default spatial relation, the UE supports the default pathloss reference RS, the UE supports any one of Embodiments 1 to 3 can also be reported. The UE capability information can also indicate that the UE makes the default spatial relation, the UE supports the default pathloss reference RS, the UE supports any one of Embodiments 1 to 3 respectively. One UE capability information can also indicate that the UE makes the default spatial relation, the UE supports the default pathloss reference RS, the UE supports all of any one of Embodiments 1 to 3.

[0262] Embodiment 5

[0263] In a case where an RRC parameter indicating at least one of the operation of applying the default spatial relation, applying the default pathloss reference RS, applying any one of Embodiments 1 to 3 is configured, the UE can also make the configured operation. In a case where the RRC parameter is not configured, the UE can also make the operation of Rel. 15. The RRC parameter can also indicate the operation of applying the default spatial relation, applying the default pathloss reference RS, applying any one of Embodiments 1 to 3 respectively. One RRC parameter can also indicate all of the operation of applying the default spatial relation, applying the default pathloss reference RS, applying any one of Embodiments 1 to 3.

[0264] Embodiment 6

[0265] The RS used in path loss calculation (default path loss reference RS) may also be a QCL type D RS in the activated TCI state for the lowest ID of the PDSCH. The default spatial relationship and the default path loss reference RS may also be combined. The UE may also perform at least one of the following operations 1 and 2.

[0266] Operation 1

[0267] For a dedicated PUCCH or dedicated SRS in FR2, when no path loss reference RS is set through RRC signaling, the default spatial relationship may also follow the following manner.

[0268] When a core set is configured on a CC, the default spatial relationship may be the TCI state or QCL assumption of the core set with the lowest ID. The RS used in the path loss calculation may also be a QCL type D RS with the same TCI state or QCL assumption as the core set with the lowest ID. The RS used in the path loss calculation may also be a periodic RS.

[0269] In the case where a CORESET is not configured on a CC, the default spatial relationship may also be the activated TCI state with the lowest ID applicable in the PDSCH within the activated DL-BWP of the CC.

[0270] The RS used in the path loss calculation may also be the RS of QCL type D with the lowest ID in the activated TCI state for the PDSCH.

[0271] Operation 2

[0272] For a dedicated PUCCH or dedicated SRS in FR2, when a path loss reference RS is set through RRC signaling, the default spatial relationship may also follow the following manner.

[0273] When a CORESET is configured on a CC, the default spatial relationship may also be the TCI state or QCL assumption of the CORESET with the lowest ID. The RS used in the path loss calculation may be an RS of the same QCL type D as the TCI state or QCL assumption of the CORESET with the lowest ID, or a configured or activated path loss reference RS. The RS used in the path loss calculation may also be a periodic RS.

[0274] In the case where a CORESET is not configured on a CC, the default spatial relationship may also be the activated TCI state with the lowest ID applicable in the PDSCH within the activated DL-BWP of the CC.

[0275] The RS used in the path loss calculation can be either the QCL Type-D RS of the activated TCI state with the lowest ID for the PDSCH or the path loss reference RS set or activated.

[0276] For example, as shown in FIG. 10, in a case where the UE uses the default spatial relation and the path loss reference RS is set for the dedicated PUCCH or the dedicated SRS in FR2 (S10: Y), the UE uses the default path loss reference RS or the path loss reference RS set or activated (S20). In a case where the UE uses the default spatial relation and the path loss reference RS is not set for the dedicated PUCCH or the dedicated SRS in FR2 (S10: N), the UE uses the default path loss reference RS (S30). Figure 3

[0277] <Embodiment 7>

[0278] The UE can also decide at least one of the default spatial relation and the default path loss reference RS for the SRS based on whether at least one of the spatial relation of the SRS resource represented by the SRI for the PUSCH and the path loss reference RS is set and apply the decided at least one of the default spatial relation and the default path loss reference RS for the SRS to the PUSCH. The decision of at least one of the default spatial relation and the default path loss reference RS for the SRS can also follow the aforementioned decision method (e.g., at least one of Embodiments 1 to 6). The UE can also follow at least one of the following Operations 1, 2, 3, and 4.

[0279] 《Operation 1》

[0280] In FR2, in a case where the PUSCH is scheduled by the DCI format 0_1 and at least one of the spatial relation of the SRS resource indicated by the SRI and the path loss reference RS is not set, the default spatial relation for the PUSCH can also be the TCI state or the QCL assumption of the CORESET set on the CC. In this case, the RS used in the path loss calculation for the PUSCH can be either the QCL Type-D RS of the TCI state or the QCL assumption of the CORESET set on the CC or the path loss reference RS set or activated. The RS used in the path loss calculation can also be a periodic RS.

[0281] ​In this case, if a CORESET is not configured on the CC, the default spatial relationship for the PUSCH may be the activated TCI state with the lowest ID applicable to the PDSCH within the CC's activated DL-BWP. In this case, the RS used in the path loss calculation for the PUSCH can be either a QCL type D RS with the activated TCI state with the lowest ID for the PDSCH, or a configured or activated path loss reference RS. The RS used in the path loss calculation may also be a periodic RS.

[0282] Operation 2

[0283] In FR2, when a PUSCH is scheduled using DCI formats 0_1 and no spatial relationship is set for the SRS resources indicated by the SRI, and no path loss reference RS is set, if a CORESET is set on the CC, the default spatial relationship for the PUSCH may also be the TCI state or QCL assumption of the CORESET with the lowest ID. In this case, the RS used in the path loss calculation for the PUSCH may also be an RS of the same QCL type D as the TCI state or QCL assumption of the CORESET with the lowest ID. The RS used in the path loss calculation may also be a periodic RS.

[0284] In this case, if a CORESET is not configured for the CC, the default spatial relationship for the PUSCH may be the activated TCI state with the lowest ID applicable to the PDSCH within the CC's activated DL-BWP. In this case, the RS used in the path loss calculation for the PUSCH may also be the QCL type D RS of the activated TCI state with the lowest ID for the PDSCH. The RS used in the path loss calculation may also be a periodic RS.

[0285] Operation 3

[0286] In FR2, in a case where PUSCH is scheduled by DCI format 0_1 and spatial relation is not configured for SRS resource indicated by SRI and pathloss reference RS is configured, in a case where CORESET is configured on the CC, the default spatial relation for the PUSCH can also be the TCI state or QCL assumption of the CORESET with the lowest ID. In this case, the RS used in pathloss calculation for the PUSCH can be either the same QCL Type-D RS as the TCI state or QCL assumption of the CORESET with the lowest ID, or the pathloss reference RS configured or activated. The RS used in pathloss calculation can also be a periodic RS.

[0287] In this case, in a case where no CORESET is configured on the CC, the default spatial relation for the PUSCH can also be the activated TCI state with the lowest ID that can be applied in PDSCH within the active DL-BWP of the CC. In this case, the RS used in pathloss calculation for the PUSCH can be either the QCL Type-D RS of the activated TCI state with the lowest ID for PDSCH, or the pathloss reference RS configured or activated. The RS used in pathloss calculation can also be a periodic RS.

[0288] Operation 4

[0289] In FR2, in a case where PUSCH is scheduled by DCI format 0_1 and spatial relation is not configured for SRS resource indicated by SRI and pathloss reference RS is configured, in a case where CORESET is configured on the CC, the default spatial relation for the PUSCH can also be the TCI state or QCL assumption of the CORESET with the lowest ID. In this case, the RS used in pathloss calculation for the PUSCH can be either the same QCL Type-D RS as the TCI state or QCL assumption of the CORESET with the lowest ID. The RS used in pathloss calculation can also be a periodic RS.

[0290] In this case, in a case where no CORESET is configured on the CC, the default spatial relation for the PUSCH can also be the activated TCI state with the lowest ID that can be applied in PDSCH within the active DL-BWP of the CC. In this case, the RS used in pathloss calculation for the PUSCH can be either the QCL Type-D RS of the activated TCI state with the lowest ID for PDSCH. The RS used in pathloss calculation can also be a periodic RS.

[0291] The size (number of bits) of the SRI field is different according to the number of SRS resources of the SRS resource set for which the use of codebook-based transmission or non-codebook-based transmission is set, for the PUSCH scheduled by the DCI format 0_1. For example, if the number of SRS resources is 1, the size of the SRI field is 0 bits, and if the number of SRS resources is 2, the size of the SRI field is 1 bit. The aforementioned "SRS resource indicated by the SRS" can also include the SRS resource in the case where the number of SRS resources is 1 (only one SRS resource within the SRS resource set for which the use of codebook-based transmission or non-codebook-based transmission is set).

[0292] (Wireless communication system)

[0293] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

[0294] Figure 4 is a diagram illustrating an example of an outline configuration of a wireless communication system according to an embodiment. The wireless communication system 1 can also be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.

[0295] Further, the wireless communication system 1 can also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). The MR-DC can include E-UTRA-NR Dual Connectivity (EN-DC) of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR, NR-E-UTRA Dual Connectivity (NE-DC) of NR and LTE, and the like.

[0296] In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Secondary Node (SN). In NE-DC, a base station (gNB) of NR is a MN, and a base station (eNB) of LTE (E-UTRA) is a SN.

[0297] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, both the MN and the SN are base stations (gNB) of NR (NR-NR Dual Connectivity (NN-DC), NR-NR dual connectivity)).

[0298] The wireless communication system 1 can also have a base station 11 that forms a macro cell C1 with a wider coverage, and base stations 12 (12a-12c) that are configured within the macro cell C1 and form small cells C2 that are narrower than the macro cell C1. The user terminal 20 can also be located within at least one cell. The configuration, number, and the like of the cells and the user terminal 20 are not limited to the manner shown in the drawing. Hereinafter, the base stations 11 and 12 are collectively referred to as base stations 10 without distinction.

[0299] The user terminal 20 can also be connected to at least one of the multiple base stations 10. The user terminal 20 can also use at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC).

[0300] Each CC can 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 can be included in the FR1, and the small cell C2 can be included in the FR2. For example, the FR1 can be a sub-6 GHz band, and the FR2 can be an above-24 GHz band. Note that the frequency bands, definitions, and the like of the FR1 and the FR2 are not limited thereto, and for example, the FR1 can correspond to a higher frequency band than the FR2.

[0301] Furthermore, in each CC, the user terminal 20 can perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0302] The plurality of base stations 10 can also be connected through wired (for example, optical fiber based on Common Public Radio Interface (CPRI), X2 interface, or the like) or wireless (for example, NR communication). For example, in a case where NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 equivalent to an upper station can also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station can also be referred to as an IAB node.

[0303] The base station 10 can also be connected to the core network 30 via another base station 10 or directly. The core network 30 can also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), or the like.

[0304] The user terminal 20 can also be a terminal that supports at least one of LTE, LTE-A, 5G, or the like.

[0305] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of Downlink (DL) and 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), or the like can also be utilized.

[0306] The wireless access scheme can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access schemes (for example, other single carrier transmission schemes, other multicarrier transmission schemes) can also be applied to the wireless access schemes in UL and DL.

[0307] As a downlink channel, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared among the user terminals 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and the like can also be used in the wireless communication system 1.

[0308] Further, as an uplink channel, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared among the user terminals 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), and the like can also be used in the wireless communication system 1.

[0309] User data, higher layer control information, a System Information Block (SIB), and the like are transmitted by the PDSCH. User data, higher layer control information, and the like can also be transmitted by the PUSCH. Further, a Master Information Block (MIB) can also be transmitted by the PBCH.

[0310] Lower layer control information can also be transmitted by the PDCCH. The lower layer control information can also include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0311] In addition, the DCI that schedules the PDSCH can also be referred to as a DL assignment, a DL DCI, or the like, and the DCI that schedules the PUSCH can also be referred to as an UL grant, an UL DCI, or the like. In addition, the PDSCH can also be interpreted as DL data, and the PUSCH can also be interpreted as UL data.

[0312] In the detection of the PDCCH, a control resource set (CORESET) and a search space can also be utilized. The CORESET corresponds to a resource in which the DCI is searched for. The search space corresponds to a search area of the PDCCH candidate and a search method. One CORESET can also be associated with one or a plurality of search spaces. The UE can also monitor the CORESET associated with a certain search space based on a search space configuration.

[0313] One search space can also correspond to the PDCCH candidate that matches one or a plurality of aggregation levels. One or a plurality of search spaces can also be referred to as a search space set. In addition, the "search space", "search space set", "search space configuration", "search space set configuration", "CORESET", "CORESET configuration", and the like of the present disclosure can also be replaced with each other.

[0314] The uplink control information (UCI) including at least one of the channel state information (CSI), the delivery confirmation information (for example, also referred to as a hybrid automatic repeat request (HARQ-ACK), ACK / NACK, and the like), and the scheduling request (SR) can also be transmitted through the PUCCH. The random access preamble for establishing a connection with the cell can also be transmitted through the PRACH.

[0315] In addition, in the present disclosure, the downlink, the uplink, and the like can also be expressed without the "link". Furthermore, it can also be expressed without the "physical" at the beginning of various channels.

[0316] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like can also be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like can also be transmitted.

[0317] The synchronization signal can be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) can also be referred to as an SS / PBCH block, an SS block (SS Block (SSB)), or the like. In addition, the SS, the SSB, and the like can also be referred to as a reference signal.

[0318] Further, as an uplink reference signal (Uplink Reference Signal (UL-RS)), in the wireless communication system 1, a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), and the like can also be transmitted. In addition, the DMRS can also be referred to as a user terminal-specific reference signal (UE-specific Reference Signal).

[0319] (Base station)

[0320] Figure 5is a drawing showing an example of a structure of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission path interface (transmission line interface) 140. Note that one or more of the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140 can be provided.

[0321] Note that, in this example, functional blocks mainly showing characteristic parts of the embodiment are shown, and it is also conceivable that the base station 10 has other functional blocks required for wireless communication. Part of the processing of each unit described below can also be omitted.

[0322] The control unit 110 performs control of the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0323] The control unit 110 can also control generation of a signal, scheduling (for example, resource allocation, mapping), and the like. The control unit 110 can also control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140. The control unit 110 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 120. The control unit 110 can also perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of wireless resources, and the like.

[0324] The transmission / reception unit 120 can include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 can include a transmission processing unit 1211 and a reception processing unit 1212. The transmission / reception unit 120 can be configured by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0325] The transmission / reception unit 120 can be configured as an integrated transmission / reception unit, or can be configured by a transmission unit and a reception unit. The transmission unit can be configured by the transmission processing unit 1211 and the RF unit 122. The reception unit can be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

[0326] The transmitting and receiving antenna 130 can be formed of an antenna described based on the common knowledge in the technical field to which this disclosure relates, such as an array antenna.

[0327] The transmitting and receiving unit 120 may also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the aforementioned uplink channel, uplink reference signal, etc.

[0328] The transmitting and receiving unit 120 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmit beam and a receive beam.

[0329] The sending and receiving unit 120 (sending processing unit 1211) can also perform processing on the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (for example, RLC retransmission control), the Medium Access Control (MAC) layer (for example, HARQ retransmission control), etc. on the data and control information obtained from the control unit 110 to generate a bit string to be sent.

[0330] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filtering, discrete Fourier transform (DFT)) processing (as needed), inverse fast Fourier transform (IFFT)) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0331] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0332] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also perform amplification, filtering, and demodulation into a baseband signal on the radio frequency band signal received by the transmitting and receiving antenna 130 .

[0333] The transmission / reception unit 120 (reception processing unit 1212) can also apply, to the acquired baseband signal, reception processing such as analog-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as necessary), filtering processing, demapping, demodulation, decoding (which can also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and the like, to acquire user data and the like.

[0334] The transmission / reception unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, and the like, based on the received signal. The measurement unit 123 can also perform measurements with respect to received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement results can also be output to the control unit 110.

[0335] The transmission path interface 140 can also transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, and the like, and can also acquire, transmit, and the like, user data (user plane data), control plane data, and the like, for the user terminal 20.

[0336] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure can also be configured by at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission path interface 140.

[0337] (User terminal)

[0338] Figure 6is a diagram showing an example of a structure of a user terminal involved in one embodiment. The user terminal 20 has a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 can each have one or more.

[0339] In addition, in the present example, functional blocks of characteristic portions in the present embodiment are mainly shown, and it is also conceivable that the user terminal 20 has other functional blocks required for wireless communication. A part of the processing of each unit described below can also be omitted.

[0340] The control unit 210 implements control of the entire user terminal 20. The control unit 210 can be constituted by a controller, a control circuit, or the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0341] The control unit 210 can also control generation, mapping, and the like of a signal. The control unit 210 can also control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, a sequence, and the like transmitted as a signal, and forward them to the transmission / reception unit 220.

[0342] The transmission / reception unit 220 can include a baseband unit 221, an RF unit 222, a measurement unit 223. The baseband unit 221 can include a transmission processing unit 2211, a reception processing unit 2212. The transmission / reception unit 220 can be constituted by a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0343] The transmission / reception unit 220 can be constituted as an integrated transmission / reception unit, or can be constituted by a transmission unit and a reception unit. The transmission unit can be constituted by the transmission processing unit 2211 and the RF unit 222. The reception unit can be constituted by the reception processing unit 2212, the RF unit 222, and the measurement unit 223.

[0344] The transmission / reception antenna 230 can be constituted by an antenna, for example, an array antenna, and the like described based on common knowledge in the technical field to which the present disclosure pertains.

[0345] The transmission / reception unit 220 can receive the downlink channel, the synchronization signal, the downlink reference signal, and the like described above. The transmission / reception unit 220 can transmit the uplink channel, the uplink reference signal, and the like described above.

[0346] The transmission / reception unit 220 can also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like to form at least one of a transmission beam and a reception beam.

[0347] The transmission / reception unit 220 (transmission processing unit 2211) can also perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), or the like, on data, control information, or the like acquired from the control unit 210, to generate a bit string to be transmitted.

[0348] The transmission / reception unit 220 (transmission processing unit 2211) can also perform channel coding (which can include error correction coding), modulation, mapping, filtering processing, DFT processing (as necessary), IFFT processing, precoding, digital-analog conversion, or the like, on the bit string to be transmitted, to output a baseband signal.

[0349] In addition, whether or not to apply DFT processing can also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), in a case where transform precoding is effective (enabled), the transmission / reception unit 220 (transmission processing unit 2211) can also perform DFT processing as the above-described transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and in a case where this is not so, the transmission / reception unit 220 (transmission processing unit 2211) can also not perform DFT processing as the above-described transmission processing.

[0350] The transmission / reception unit 220 (RF unit 222) can also perform modulation to a radio frequency band, filtering processing, amplification, or the like, on the baseband signal, to transmit a signal of the radio frequency band via the transmission / reception antenna 230.

[0351] On the other hand, the transmission / reception unit 220 (RF unit 222) can also perform amplification, filtering processing, demodulation to a baseband signal, or the like, on a signal of the radio frequency band received by the transmission / reception antenna 230.

[0352] The transmission / reception unit 220 (reception processing unit 2212) can also apply analog-digital conversion, FFT processing, IDFT processing (as necessary), filtering processing, demapping, demodulation, decoding (which can include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, or the like, on the acquired baseband signal, to acquire user data or the like.

[0353] The transmission / reception unit 220 (measurement unit 223) can also perform a measurement related to a received signal. For example, the measurement unit 223 can also perform an RRM measurement, a CSI measurement, and the like, based on a received signal. The measurement unit 223 can also perform a measurement with respect to a reception power (for example, RSRP), a reception quality (for example, RSRQ, SINR, SNR), a signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement result can also be output to the control unit 210.

[0354] In addition, the transmission unit and the reception unit of the user terminal 20 in the present disclosure can also be constituted by at least one of the transmission / reception unit 220 and the transmission / reception antenna 230.

[0355] The transmission / reception unit 220 can also receive setting information indicating a physical uplink control channel (PUCCH) resource that does not contain spatial relation information and has a lowest ID. The control unit 210 can also control reception of a physical uplink shared channel (PUSCH) scheduled by a downlink control information (DCI) format 0_0.

[0356] The transmission / reception unit 220 can also receive the DCI format 0_0 in a frequency range (FR) 2 and a radio resource control (RRC) connected mode.

[0357] The transmission / reception unit 220 can also receive the DCI format 0_0 in an active uplink bandwidth part (BWP) in which the PUCCH resource is set.

[0358] The transmission / reception unit 220 can also receive setting information of one uplink transmission of a physical uplink control channel (PUCCH) and a sounding reference signal (SRS). The setting information can also not contain information of a spatial relation information and a reference signal for path loss reference. The control unit 210 can also use a reference signal of an active transmission control indication (TCI) state with a lowest ID for a physical downlink shared channel (PDSCH) in path loss calculation for the uplink transmission.

[0359] The reference signal can also be used in path loss calculation for a physical uplink shared channel (PUSCH).

[0360] The reference signal can also be a quasi co-location (QCL) type D.

[0361] (Hardware structure)

[0362] Further, the block diagrams used in the description of the above-described embodiments show blocks of functional units. These functional blocks (structural units) are realized by any combination of hardware and software, and the method of realizing the functional blocks is not particularly limited. That is, each functional block can be realized by one device physically or logically integrated, or by two or more devices directly or indirectly (for example, by wire, wireless, or the like) connected. The functional blocks can also be realized by combining the above-described one device or the above-described multiple devices with software.

[0363] Here, among the functions, there are judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but are not limited to these. For example, a functional block (structural unit) that realizes a transmission function can also be referred to as a transmitting unit, a transmitter, or the like. Any one of these is as described above, and the method of realization is not particularly limited.

[0364] For example, the base station, the user terminal, and the like in one embodiment of the present disclosure can also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 7 is a diagram showing an example of a hardware structure of the base station and the user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

[0365] Further, in the present disclosure, the terms of device, circuit, equipment, section, unit, and the like can be replaced with each other. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of each device shown in the diagram, or can be configured not to include a part of the devices.

[0366] For example, the processor 1001 is only illustrated one, but there can be a plurality of processors. Furthermore, the processing can be executed by one processor, or can be executed by two or more processors simultaneously, sequentially, or with other methods. In addition, the processor 1001 can be realized by one or more chips.

[0367] As for each function in the base station 10 and the user terminal 20, at least one of the operation by the processor 1001 and the control of the communication via the communication device 1004, or the control of the readout and the writing of the data in the memory 1002 and the storage 1003 is realized, for example, by reading a specific software (program) into the hardware such as the processor 1001, the memory 1002, and the like, and thereby performing the operation and the control by the processor 1001.

[0368] The processor 1001 causes, for example, an operating system to operate to control the entire computer. The processor 1001 can also be constituted by a central processing device (Central Processing Unit (CPU)) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, at least a part of the above-described control unit 110 (210), the transmission-reception unit 120 (220), and the like can also be realized by the processor 1001.

[0369] Furthermore, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processing according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments can be used. For example, the control unit 110 (210) can also be realized by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be applied to other functional blocks.

[0370] The memory 1002 can also be a computer-readable recording medium, for example, constituted by at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), other appropriate storage medium. The memory 1002 can also be referred to as a register, a cache, a main storage (main storage device), and the like. The memory 1002 can hold a program (program code), a software module, and the like that can be executed in order to implement the wireless communication method related to one embodiment of the present disclosure.

[0371] The storage 1003 can also be a computer-readable recording medium such as at least one of a flexible disc, a floppy (registered trademark) disc, a magneto-optical disc (e.g., a compact disc read-only memory (CD-ROM) and the like), a digital versatile disc, a Blu-ray (registered trademark) disc, a removable disc, a hard disc drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and the like. The storage 1003 can also be referred to as an auxiliary storage device.

[0372] The communication device 1004 is hardware (a transceiver device) for performing communication between computers via at least one of a wired network and a wireless network, also referred to as a network device, a network controller, a network card, a communication module, and the like. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The above-described transceiver 120 (220), a transceiver antenna 130 (230), and the like can also be implemented by the communication device 1004. The transceiver 120 (220) can also be installed physically or logically separately by a transmission unit 120a (220a) and a reception unit 120b (220b).

[0373] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from an outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, and the like) that performs an output to an outside. In addition, the input device 1005 and the output device 1006 can also be a structure that is integrated (e.g., a touch panel).

[0374] Further, the processor 1001, the memory 1002, and the like are connected through a bus 1007 for communicating information. The bus 1007 can be configured with a single bus, or different buses among the devices.

[0375] Furthermore, the base station 10 and the user terminal 20 can also be configured to include a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like hardware, and a part or all of the functional blocks can also be implemented with the hardware. For example, the processor 1001 can also be implemented with at least one of these hardware.

[0376] (Modified example)

[0377] In addition, the terms described in the present disclosure and the terms necessary for understanding the present disclosure can also be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (a signal or signaling) can also be replaced with each other. In addition, a signal can also be a message. A Reference Signal (RS) can also be simply referred to as RS, and can also be referred to as a Pilot, a Pilot signal, and the like depending on the applied standard. In addition, a Component Carrier (CC) can also be referred to as a cell, a frequency carrier, a carrier frequency, and the like.

[0378] A radio frame can also be configured of one or a plurality of periods (frames) in the time domain. Each period (frame) of the one or a plurality of periods (frames) configuring the radio frame can also be referred to as a subframe. Further, a subframe can also be configured of one or a plurality of slots in the time domain. A subframe can also be a fixed time length (for example, 1 ms) independent of numerology.

[0379] Here, numerology can also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, numerology can also indicate at least one of 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 processing performed by a transmitter-receiver in the frequency domain, a specific windowing processing performed by the transmitter-receiver in the time domain, and the like.

[0380] A slot can also be composed of one or a plurality of symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, and the like) in the time domain. In addition, a slot can also be a time unit based on a numerology.

[0381] A slot can also include a plurality of mini-slots. Each mini-slot can also be composed of one or a plurality of symbols in the time domain. In addition, a mini-slot can also be referred to as a sub-slot. A mini-slot can also be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a larger time unit than a mini-slot can also be referred to as PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot can also be referred to as PDSCH (PUSCH) mapping type B.

[0382] A radio frame, a subframe, a slot, a mini-slot, and a symbol each represent a time unit for transmitting a signal. A radio frame, a subframe, a slot, a mini-slot, and a symbol can also be referred to by other names respectively corresponding thereto. In addition, a time unit in the disclosure, such as a frame, a subframe, a slot, a mini-slot, a symbol, and the like, can be replaced with each other.

[0383] For example, one subframe can also be referred to as a TTI, a plurality of consecutive subframes can also be referred to as a TTI, one slot or one mini-slot can also be referred to as a TTI. That is, at least one of a subframe and a TTI can be a subframe (1 ms) in the existing LTE, can be a period shorter than 1 ms (for example, 1-13 symbols), or can be a period longer than 1 ms. In addition, a unit representing a TTI can not be referred to as a subframe, but can be referred to as a slot, a mini-slot, or the like.

[0384] Here, a TTI, for example, refers to a minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling in which a radio resource (a frequency bandwidth, a transmission power, and the like that can be used in each user terminal) is allocated to each user terminal in a TTI unit. In addition, the definition of a TTI is not limited thereto.

[0385] A TTI can also be a transmission time unit of a data packet (a transport block), a code block, a codeword, and the like that have been channel-encoded, and can also become a processing unit of scheduling, link adaptation, and the like. In addition, when a TTI is given, a time interval (for example, a number of symbols) to which a transport block, a code block, a codeword, and the like are actually mapped can be shorter than the TTI.

[0386] In addition, in a case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) can also be a minimum time unit of scheduling. In addition, the number of slots (mini-slots) constituting the minimum time unit of scheduling can also be controlled.

[0387] A TTI having a time length of 1 ms can also be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

[0388] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can also be interpreted as a TTI having a time length of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can also be interpreted as a TTI having a TTI length less than that of a long TTI and a TTI length of 1 ms or more.

[0389] A resource block (RB) is a resource allocation unit in a time domain and a frequency domain, and can also include one or more contiguous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB can also be the same regardless of numerologies, for example, 12. The number of subcarriers included in an RB can also be determined based on numerologies.

[0390] In addition, an RB can also include one or more symbols in a time domain, and can also be a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, etc. can also be constituted by one or more resource blocks, respectively.

[0391] In addition, one or more RBs can also be referred to as a physical RB (PRB), a subcarrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0392] In addition, a resource block can also be constituted by one or more resource elements (REs). For example, one RE can also be a wireless resource area of one subcarrier and one symbol.

[0393] A Bandwidth Part (BWP) (also referred to as a fractional bandwidth) can also represent a subset of contiguous common resource blocks (RBs) used for a parameter set within a carrier. Common RBs can also be identified by their index relative to the common reference point of the carrier. PRBs can also be defined within a BWP and numbered within that BWP.

[0394] The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured within one carrier.

[0395] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive specific signals / channels outside of the activated BWP. In addition, "cell", "carrier", etc. in this disclosure may also be interpreted as "BWP".

[0396] The above-mentioned structures of radio frames, subframes, slots, mini-slots, and symbols are merely examples. For example, various modifications may be made to the number of subframes in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots within a slot, the number of symbols and RBs within a slot or mini-slot, the number of subcarriers within an RB, the number of symbols within a TTI, the symbol length, and the cyclic prefix (CP) length.

[0397] Furthermore, the information and parameters described in this disclosure may be expressed as absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may be indicated by specific indexes.

[0398] In this disclosure, the names used for parameters, etc., are not intended to be limiting in any respect. Furthermore, the mathematical formulas for these parameters, etc., may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not intended to be limiting in any respect.

[0399] Information, signals, and the like described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referred to throughout the foregoing description may also be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0400] Furthermore, information, a signal, and the like can be output along at least one of a direction from a higher layer (upper layer) to a lower layer (lower layer) and a direction from a lower layer to a higher layer. Information, a signal, and the like can also be input and output via a plurality of network nodes.

[0401] Information, a signal, and the like that are input and output can be saved in a specific location (for example, a memory) and can be managed using a management table. Information, a signal, and the like that are input and output can be overwritten, updated, or added. Information, a signal, and the like that are output can be deleted. Information, a signal, and the like that are input can be transmitted to another device.

[0402] The notification of information is not limited to the manners / embodiments described in the present disclosure and can be performed using other methods. For example, the notification of information in the present disclosure can also be performed through physical layer signaling (for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI))), higher layer signaling (for example, Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), and the like), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0403] In addition, the physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like. Furthermore, the RRC signaling can also be referred to as an RRC message, for example, can also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, and the like. Furthermore, the MAC signaling can also be notified using a MAC control element (MAC Control Element (CE)), for example.

[0404] Furthermore, the notification of specific information (for example, the notification of “X is X”) is not limited to explicit notification and can be performed implicitly (for example, by not performing the notification of the specific information or by the notification of other information).

[0405] The determination can be made by a value represented by one bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a specific value).

[0406] Software, regardless of being referred to as software, firmware, middle-ware, micro-code, hardware description language, or by other names, should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, sub-programs, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, and the like.

[0407] Furthermore, software, instructions, information, and the like can also be transmitted and received via a transmission medium. For example, in the case where software is transmitted from a website, a server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber cable, twisted pair cable, Digital Subscriber Line (DSL), and the like) and wireless technologies (infrared rays, microwaves, and the like), at least one of these wired technologies and wireless technologies is included in the definition of a transmission medium.

[0408] The terms "system" and "network" used in the present disclosure can be used interchangeably. The "network" can also mean a device (for example, a base station) included in the network.

[0409] In the present disclosure, the terms of “precoding”, “precoder”, “weight (precoding weight)”, “Quasi-Co-Location (QCL)”, “Transmission Configuration Indication state (TCI state)”, “spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel”, and the like can be used interchangeably.

[0410] In the present disclosure, the terms of “Base Station (BS)”, “wireless base station”, “fixed station”, “NodeB”, “eNB (eNodeB)”, “gNB (gNodeB)”, “access point”, “transmission point (TP)”, “reception point (RP)”, “transmission / reception point (TRP)”, “panel”, “cell”, “sector”, “cell group”, “carrier”, “component carrier”, and the like can be used interchangeably. There is also a case where the base station is called with the terms of macro cell, small cell, femto cell, pico cell, and the like.

[0411] A base station can accommodate one or plural (for example, three) cells. In a case where the base station accommodates plural cells, the coverage area of the base station as a whole can be divided into plural smaller areas, and each of the smaller areas can also be provided with a communication service by a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). The term of “cell” or “sector” refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides a communication service in the coverage.

[0412] In the present disclosure, the terms of “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, “terminal”, and the like can be used interchangeably.

[0413] In some cases, mobile stations are also referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other suitable terminology.

[0414] At least one of the base station and the mobile station can also be referred to as a transmission device, a reception device, a wireless communication device, or the like. In addition, at least one of the base station and the mobile station can also be a device mounted on a mobile body, a mobile body itself, or the like. The mobile body can be a vehicle (for example, a car, an airplane, or the like), can also be a mobile body that moves in an unmanned manner (for example, a drone, an automated driving vehicle, or the like), and can also be a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move while performing a communication operation. For example, at least one of the base station and the mobile station can also be a sensor or the like, an Internet of Things (IoT) device.

[0415] Furthermore, the base station in the present disclosure can also be interpreted as a user terminal. For example, for a structure in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, can also be referred to as Device-to-Device (D2D), Vehicle-to-Everything (V2X), or the like), each of the modes / embodiments of the present disclosure can also be applied. In this case, a structure in which the user terminal 20 has the functions of the base station 10 described above can also be provided. Furthermore, expressions such as "uplink" and "downlink" can also be interpreted as expressions corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, or the like can also be interpreted as a side channel.

[0416] Likewise, the user terminal in the present disclosure can also be interpreted as a base station. In this case, a structure in which the base station 10 has the functions of the user terminal 20 described above can also be provided.

[0417] In the present disclosure, actions performed by a base station are sometimes also performed by its upper node depending on the situation. Obviously, in a network including one or more network nodes having a base station, various actions performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, consider a Mobility Management Entity (MME), a Serving-Gateway (S-GW), and the like, but not limited to these), or a combination thereof.

[0418] The modes / embodiments explained in the present disclosure can be used individually, in combination, and also switched as execution proceeds. Furthermore, the processing procedure, sequence, flowchart, and the like of the modes / embodiments explained in the present disclosure can also be changed in order as long as there is no contradiction. For example, for the methods explained in the present disclosure, the elements of various steps are prompted using the order of the examples, but are not limited to the specific order prompted.

[0419] The modes / embodiments explained in the present disclosure can also be applied to 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), 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 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, next-generation systems extended based on them, and the like. In addition, a plurality of systems can also be combined (for example, LTE or LTE-A, in combination with 5G, and the like) to be applied.

[0420] The recitation "based on" used in the present disclosure does not mean "based only on" unless specifically written. In other words, the recitation "based on" means both "based only on" and "based at least on".

[0421] Any reference to elements using the recitations "first", "second", and so on used in the present disclosure does not comprehensively limit the number or order of the elements. The recitations can be used in the present disclosure as a convenient method of distinguishing between two or more elements. Therefore, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must be prior in form to the second element.

[0422] The term "determining" as used in this disclosure can, in some instances, encompass a wide variety of actions. For example, "determining" can be construed as "deciding", "calculating", "computing", "processing", "deriving", "investigating", "looking up" (e.g., looking up in a table, a database or another data structure), "ascertaining" and the like.

[0423] In addition, "determining" can also be construed as "receiving", "transmitting", "input", "output", "accessing" (e.g., accessing data in a memory) and the like.

[0424] In addition, "determining" can also be construed as "resolving", "selecting", "choosing", "establishing", "comparing" and the like. That is, "determining" can also be construed as "determining" some action.

[0425] In addition, "determining" can also be construed as "assuming", "expecting", "considering" and the like.

[0426] The term "connected", "coupled", or any variant thereof, as used in this disclosure, indicates any connection or coupling, either direct or indirect, between two or more elements, and can encompass the presence of one or more intermediate elements between two elements that are "connected" or "coupled" together. The coupling or connection between the elements can be physical, logical, or a combination thereof. For example, "connected" can be construed as "accessed".

[0427] In the present disclosure, in the case of connecting two elements, it can be considered that one or more electric wires, cables, printed electric connections, and the like are used, and as several non-limiting and non-inclusive examples, electromagnetic energy having a wavelength of a wireless frequency domain, a microwave region, a light (both visible and non-visible) region, and the like are used to be "connected" or "combined" with each other.

[0428] In the present disclosure, the term "A is different from B" can also mean "A and B are different from each other". In addition, the term can also mean "A and B are different from C, respectively". The terms "separate", "combine", and the like can also be interpreted as "different" in the same way.

[0429] In the present disclosure, in the case of using "include", "including", and variations thereof, these terms mean the same as the term "comprising" in the inclusive sense. Further, the term "or" used in the present disclosure does not mean the exclusive sense.

[0430] In the present disclosure, for example, in the case of adding an article by translation such as a, an, and the in English, the present disclosure can also include the case where the noun following the article is plural.

[0431] The above has been described in detail for the invention related to the present disclosure, but for those skilled in the art, the invention related to the present disclosure is obviously not limited to the embodiments described in the present disclosure. The invention related to the present disclosure can be implemented as a modification and a change without departing from the spirit and scope of the invention determined based on the recitations of the claims. Therefore, the recitations of the present disclosure are for the purpose of illustrative explanation, and do not have any limiting meaning on the invention related to the present disclosure.

[0432] This application is based on Japanese Patent Application 2019-210877 filed on November 21, 2019. The contents thereof are entirely included herein.

Claims

1. A terminal having: a reception unit that receives information of one or more transmission control indication (TCI) states for a physical downlink shared channel (PDSCH); and a control unit that estimates a path loss for a sounding reference signal (SRS) based on an active TCI state corresponding to a lowest ID among the one or more TCI states, in a case where a reference signal for estimation of the path loss for the SRS is not configured, spatial relation information for the SRS is not configured, and a control resource set is not configured within an active downlink bandwidth part (BWP) of a cell of the SRS, estimates the path loss based on a periodic reference signal of a specific quasi co-location (QCL) type within the active TCI state, in a case where the reference signal is not configured, the spatial relation information is not configured, and the control resource set is not configured in the active downlink BWP.

2. A wireless communication method of a terminal having: a step of receiving information of one or more transmission control indication (TCI) states for a physical downlink shared channel (PDSCH); and a step of estimating a path loss for a sounding reference signal (SRS) based on an active TCI state corresponding to a lowest ID among the one or more TCI states, in a case where a reference signal for estimation of the path loss for the SRS is not configured, spatial relation information for the SRS is not configured, and a control resource set is not configured within an active downlink bandwidth part (BWP) of a cell of the SRS, estimating the path loss based on a periodic reference signal of a specific quasi co-location (QCL) type within the active TCI state, in a case where the reference signal is not configured, the spatial relation information is not configured, and the control resource set is not configured in the active downlink BWP.

3. A base station having: a transmission unit that transmits information of one or more transmission control indication (TCI) states for a physical downlink shared channel (PDSCH); and a control unit that controls reception of a sounding reference signal (SRS) that is transmitted using a path loss based on an active TCI state corresponding to a lowest ID among the one or more TCI states, in a case where a reference signal for estimation of the path loss for the SRS is not configured, spatial relation information for the SRS is not configured, and a control resource set is not configured within an active downlink bandwidth part (BWP) of a cell of the SRS, the path loss being estimated based on a periodic reference signal of a specific quasi co-location (QCL) type within the active TCI state, in a case where the reference signal is not configured, the spatial relation information is not configured, and the control resource set is not configured in the active downlink BWP.

4. A system including a terminal and a base station, the terminal having: a reception unit that receives information of one or more transmission control indication (TCI) states for a physical downlink shared channel (PDSCH); and ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ a control unit estimates the path loss based on an activated TCI state corresponding to a lowest ID among the one or more TCI states, in a case where a reference signal for estimation of path loss of a sounding reference signal (SRS) is not configured, spatial relation information for the SRS is not configured, and a control resource set is not configured within an activated downlink bandwidth part (BWP) of a cell of the SRS, the control unit estimates the path loss based on a periodic reference signal of a specific quasi co-location (QCL) type within the activated TCI state, in a case where the reference signal is not configured, the spatial relation information is not configured, and the control resource set is not configured in the activated downlink BWP, the base station has a transmission unit that transmits information of the one or more TCI states to the terminal.

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