Terminal and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit, which determines a power control parameter for uplink transmission when the spatial relationship information for uplink transmission of any one of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) scheduled by downlink control information (DCI) format 0_1 ​​is not set, and determines the transmission power of the uplink transmission based on the power control parameter; and a transmission unit, which performs the uplink transmission using the transmission power. According to one embodiment of the present disclosure, UL transmission can be properly transmitted.

Description

Technical Field

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) is standardized for the purpose of further high-speed data rate, low latency, etc. (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) is standardized for the purpose of further increasing the capacity and sophistication of LTE (Release (Rel.) 8, 9) (Third Generation Partnership Project (3GPP)).

[0003] Successor systems of LTE (for example, also referred to as fifth generation mobile communication system (5G), 5G+(plus), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In future wireless communication systems (e.g., NR), research is underway to control transmission and reception processing in user terminals (terminal, user terminal, User Equipment (UE)) based on information related to Quasi-Co-Location (QCL)).

[0009] However, it is unclear how to determine the QCL parameters (spatial relationship) in uplink (UL) transmission. If the UE does not determine an appropriate spatial relationship, there is a concern that system performance may be degraded, such as a decrease in throughput.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal and a wireless communication method for appropriately transmitting UL transmission.

[0011] Means for solving problems

[0012] A terminal involved in one embodiment of the present disclosure comprises: a control unit, which determines a power control parameter for uplink transmission when the spatial relationship information for uplink transmission of either a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) scheduled through downlink control information (DCI) format 0_1 ​​is not set, and determines the transmission power of the uplink transmission based on the power control parameter; and a transmission unit, which performs the uplink transmission using the transmission power.

[0013] Effects of the Invention

[0014] According to one embodiment of the present disclosure, UL transmission can be properly performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing an example of QCL assumption for PDSCH.

[0016] Figure 2 This is a diagram showing an example of the operation involved in Implementation Example 1.

[0017] Figure 3 This is a diagram showing an example of the operation involved in Implementation Example 2.

[0018] Figure 4 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0019] Figure 5 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0020] Figure 6 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0021] Figure 7 This is a diagram showing an example of the hardware configuration of a base station and a user terminal involved in one embodiment. DETAILED DESCRIPTION

[0022] (Transmit Power Control)

[0023] <Transmission Power Control for PUSCH>

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

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

[0026] In addition, the PUSCH transmission occasion i is the period during which PUSCH is transmitted. For example, it can be composed of one or more symbols, one or more time slots, etc.

[0027] [Equation 1]

[0028] Formula (1)

[0029]

[0030] Here, P CMAX，f，c(i) is, for example, set to the transmission power of the user terminal for carrier f of serving cell c in transmission occasion i (also known as the maximum transmission power, UE maximum output power, etc.). P O_PUSCH，b，f，c (j) is, for example, a parameter related to the target received power for the active UL BWP b of carrier f of serving cell c in transmission occasion i (for example, also known as a parameter related to the transmission power offset, transmission power offset P0, target received power parameter, etc.).

[0031] M PUSCH RB，b，f，c (i) is, for example, the number of resource blocks (bandwidth) allocated to PUSCH for transmission occasion i in the active UL BWP b of carrier f for serving cell c and subcarrier spacing μ. α b，f，c(j) is a value provided by a higher layer parameter (for example, also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.).

[0032] PL b，f，c (q d ) is, for example, an index q of a reference signal (reference signal (RS), path loss reference RS, path loss reference RS, path loss measurement DL-RS, PUSCH-PathlossReferenceRS) for downlink BWP associated with the activated UL BWP b of carrier f of serving cell c d The path loss (path loss estimation [dB], path loss compensation) is calculated by the user terminal.

[0033] In the case where the UE is not provided with a path loss reference RS (e.g., PUSCH-PathlossReferenceRS), or in the case where the UE is not provided with dedicated higher layer parameters, the UE may also use RS resources from the synchronization signal (SS) / physical broadcast channel (PBCH) block (SS block (SSB)) used to obtain the master information block (MIB) to calculate the PL b，f，c (q d ).

[0034] In the case where the UE is configured with the number of RS resource indices up to the value of the maximum number of path loss reference RSs (e.g., maxNrofPUSCH-PathlossReferenceRSs) and the set of RS settings for RS resource indices is configured by the path loss reference RS, the set of RS resource indices may also include one or both of the set of SS / PBCH block indices and the set of channel state information (CSI)-reference signal (RS) resource indices. The UE may also identify the RS resource index q in the set of RS resource indices. d .

[0035] When PUSCH transmission is scheduled by a Random Access Response (RAR) UL grant, the UE may also use the same RS resource index q as the corresponding PRACH transmission. d .

[0036] When the UE is provided with a sounding reference signal (SRS) resource indicator (SRI)-based PUSCH power control configuration (e.g., SRI-PUSCH-PowerControl) and is provided with one or more values ​​of the path loss reference RS ID, the mapping between the set of values ​​for the SRI field in DCI format 0_1 ​​and the set of path loss reference RS ID values ​​may also be obtained from higher layer signaling (e.g., SRI-PUSCH-PowerControl-Id in SRI-PUSCH-PowerControl). The UE determines the RS resource index q based on the path loss reference RS ID mapped to the SRI field value in DCI format 0_1 ​​for scheduling the PUSCH. d .

[0037] When a PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with PUCCH spatial relation information for the PUCCH resource with the lowest index of activated UL BWP b for each carrier f and serving cell c, the UE may also use the same RS resource index q as the PUCCH transmission within the PUCCH resource d .

[0038] In the case where PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with a spatial setting for PUCCH transmission, or in the case where PUSCH transmission is scheduled by DCI format 0_1 ​​not including the SRI field, or in the case where the setting of SRI-based PUSCH power control is not provided to the UE, the UE may also use the RS resource index q with a zero path loss reference RS ID d .

[0039] When the grant configuration includes a specific parameter (e.g., rrc-ConfiguredUplinkGrant) for a PUSCH transmission configured by a configuration grant configuration (e.g., ConfiguredGrantConfig), the RS resource index q d It may also be provided to the UE via a path loss reference index (eg, pathlossReferenceIndex) within a specific parameter.

[0040] In the case where the setting permission configuration does not include a specific parameter for the PUSCH transmission configured by the setting permission configuration, the UE may also determine the RS resource index q based on the value of the path loss reference RS ID mapped to the SRI field in the DCI format for activating PUSCH transmission. d In the case where the DCI format does not contain the SRI field, the UE may also determine the RS resource index q of the ID of the reference RS with zero path loss. d .

[0041] Δ TF，b，f，c (i) is a transmission power adjustment component (offset, transmission format compensation) for UL BWP b of carrier f of serving cell c.

[0042] f b，f，c (i, l) is the PUSCH power control adjustment state of the activated UL BWP b for carrier f of serving cell c in transmission opportunity i. b，f，c (i, l) can also be expressed by formula (2).

[0043] [Number 2]

[0044] Formula (2)

[0045]

[0046] Here, δ PUSCH，b，f，c (i, l) can also be a TPC command value contained in DCI format 0_0 or DCI format 0_1 ​​for scheduling PUSCH transmission opportunity i on activated UL BWP b of carrier f of serving cell c, or a TPC command value encoded in combination with other TPC commands in DCI format 2_2 having a CRC encrypted with a specific RNTI (Radio Network Temporary Identifier) ​​(for example, TPC-PUSCH-RNTI).

[0047] Σ m＝0 C(Di)-1 δ PUCCH，b，f，c (m, l) can also have a concentration (cardinality) C (D i ) of the TPC command values ​​D i The total of the TPC command values ​​in D i It can also be the K of the UE for PUSCH power control adjustment state 1 and PUSCH transmission opportunity i-i0 on the activated UL BWP b of carrier f in serving cell c.PUSCH The set of TPC command values received between (i - i0) symbols before and the K of PUSCH transmission occasion i. PUSCH (i) The set of TPC command values received between symbols before. i0 can also be the K of PUSCH transmission occasion (i - i0). PUSCH (i - i0) symbols before the K of PUSCH transmission occasion i. PUSCH (i) The smallest positive integer earlier than the symbols before.

[0048] When PUSCH transmission is scheduled by DCI format 0_0 or DCI format 0_1, K PUSCH (i) can also be the number of symbols in the active UL BWP b of carrier f of serving cell c between the last symbol received by the corresponding PDCCH and the first symbol of this PUSCH transmission. When PUSCH transmission is configured by configured grant configuration information (ConfiguredGrantConfig), K PUSCH (i) can also be the number of symbols N in each time slot of the active UL BWP b of carrier f of serving cell c symb slot and the product equal to the minimum value of the value provided by k2 in PUSCH common configuration information (PUSCH - ConfigCommon). PUSCH，min The number of symbols.

[0049] The power control adjustment state can also be set by a higher - layer parameter to have multiple states (e.g., 2 states) or a single state. In addition, when multiple power control adjustment states are set, one of the multiple power control adjustment states can also be identified by an index l (e.g., l ∈ {0, 1}).

[0050] In addition, Equations (1) and (2) are only examples and are not limited thereto. The user terminal only needs to control the transmission power of PUSCH based on at least one of the parameters exemplified by Equations (1) and (2), which can include additional parameters or omit some parameters. In addition, in the above - mentioned Equations (1) and (2), the transmission power of PUSCH is controlled for each active UL BWP of a certain carrier of a certain serving cell, but it is not limited thereto. At least a part of the serving cell, carrier, BWP, and power control adjustment state can also be omitted.

[0051] <PUCCH Transmission Power Control>

[0052] In addition, in NR, the transmission power of PUCCH is controlled based on the TPC command (also called value, increase or decrease value, calibration value, indication value, etc.) represented by the value of a field (also called TPC command field, first field, etc.) within DCI.

[0053] For example, using the index l of the power control adjustment state (PUCCH power control adjustment state), the PUCCH transmission power (P PUCCH、b，f，c (i, q u ,q d , l)) can also be expressed by the following equation (3). The power control adjustment state can also be referred to as the value of the TPC command based on the power control adjustment state index l, the accumulated value of the TPC command, or the value based on the closed loop. l can also be referred to as the closed loop index.

[0054] Furthermore, the PUCCH transmission opportunity i is a period during which the PUCCH is transmitted, and may be composed of, for example, one or more symbols, one or more time slots, and the like.

[0055] [Number 3]

[0056] Formula (3)

[0057]

[0058] Here, P CMAX，f，c (i) is, for example, the transmission power (also referred to as maximum transmission power, UE maximum output power, etc.) of the user terminal set for carrier f of serving cell c in transmission opportunity i. O_PUCCH，b，f，c (q u ) is, for example, a parameter related to the target receiving power for activating UL BWP b of carrier f of service cell c set in transmission opportunity i (for example, also referred to as a parameter related to the transmission power offset, the transmission power offset P0, or a target receiving power parameter, etc.).

[0059] M PUCCH RB，b，f，c (i) is, for example, the number of resource blocks (bandwidth) allocated to the PUCCH for transmission opportunity i in the activated UL BWP b of the serving cell c and the carrier f with a subcarrier spacing μ. b，f，c (q d) is, for example, an index q of a reference signal for a downlink BWP (path loss reference RS, path loss reference RS, path loss measurement DL-RS, PUCCH-PathlossReferenceRS) associated with an activated UL BWP b of a carrier f of a serving cell c. d The path loss (path loss estimation [dB], path loss compensation) is calculated by the user terminal.

[0060] If the UE is not provided with path loss reference RSs, or before the UE is provided with dedicated higher layer parameters, the UE calculates the path loss PL using RS resources obtained from the SS / PBCH block used by the UE to obtain the MIB. b，f，c (q d ).

[0061] If the UE is provided with path loss reference RS information (pathlossReferenceRSs in PUCCH power control information (PUCCH-PowerControl)) and is not provided with PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), the UE obtains the value of the reference signal (referencesignal) in the PUCCH path loss reference RS with the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) with index 0 in the PUCCH path loss reference RS information (PUCCH-PathlossReferenceRS). The resource of the reference signal is located in the same serving cell, or, if provided, in any of the serving cells indicated by the value of the path loss reference linking information (pathlossReferenceLinking). The path loss reference linking information indicates whether the UE applies the DL of any of the special cell (SpCell) and the secondary cell (SCell) corresponding to the UL as a path loss reference. SpCell can be either a primary cell (PCell) in a master cell group (MCG) or a primary secondary cell (PSCell) in a secondary cell group (SCG). Path loss reference RS information represents a set of reference signals (e.g., CSI-RS structure or SS / PBCH block) used in PUCCH path loss estimation.

[0062] Δ F_PUCCH (F) is a higher layer parameter provided for each PUCCH format. TF，b，f，c (i) is a transmission power adjustment component (offset) for UL BWP b of carrier f of serving cell c.

[0063] g b，f，c (i, 1) is the value of the TPC command of the power control adjustment state index l based on the activated UL BWP of the carrier f of the serving cell c and the transmission opportunity i (e.g., power control adjustment state, cumulative value of TPC commands, closed loop based value, PUCCH power adjustment state). b , f,c(i,l) can also be expressed by formula (4).

[0064] [Number 4]

[0065] Formula (4)

[0066]

[0067] Here, δ PUCCH，b，f，c (i, l) is the TPC command value, which is included in DCI format 1_0 or DCI format 1_1 detected by the UE in the PUCCH transmission opportunity i of the activated UL BWPb of the carrier f of the serving cell c, or can also be encoded in combination with other TPC commands in DCI format 2_2 with a CRC encrypted by a specific RNTI (Radio Network Temporary Identifier) ​​(for example, TPC-PUSCH-RNTI).

[0068] Σ m＝0 C(Ci)-1 δ PUCCH，b，f，c (m, l) can also have a concentration (cardinality) C (C i ) is a set of TPC command values ​​C i The total of the TPC command values ​​in C i It can also be the K of the UE for the PUCCH power control adjustment state l and the activated UL BWP b of the carrier f in the serving cell c and the PUCCH transmission opportunity i-i0 PUCCH (i-i0)-1 symbol ago and K of PUSCH transmission opportunity i PUCCH (i) The set of TPC command values ​​received between codewords. i0 can also be the K of PUSCH transmission opportunity i-i0. PUCCH(i-i0) symbol before PUSCH transmission opportunity i K PUCCH (i) The smallest positive integer preceding a code element.

[0069] If the PUCCH transmission corresponds to the detection of DCI format 1_0 or DCI format 1_1 based on the UE, K PUCCH (i) It may also be the number of symbols in the activated UL BWP b of carrier f of serving cell c after the last symbol received on the corresponding PDCCH and before the first symbol transmitted on the corresponding PUCCH. If PUCCH transmission is configured by configuring the grant structure information (ConfiguredGrantConfig), K PUSCH (i) It can also be the number of symbols N per time slot in the activated UL BWP b of carrier f serving cell c. symb slot K is equal to the product of the minimum value provided by k2 in the PUSCH common configuration information (PUSCH-ConfigCommon) PUCCH，min The number of code elements.

[0070] When the UE is provided with information indicating the use of two PUCCH power control adjustment states (twoPUCCH-PC-AdjustmentStates) and PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), l={0,1}; when the UE is not provided with information indicating the use of two PUCCH power control adjustment states or PUCCH spatial relationship information, l=0.

[0071] If the UE obtains the TPC command value from DCI format 1_0 or 1_1, and the UE is provided with PUCCH spatial relationship information, the UE can also obtain the mapping between the PUCCH spatial relationship information ID (pucch-SpatialRelationInfoId) value and the closed loop index (closedLoopIndex, power adjustment state index l) through the index provided by the PUCCH P0 ID (p0-PUCCH-Id in p0-Set in PUCCH-PowerControl in PUCCH-Config). When the UE receives an activation command including the value of the PUCCH spatial relationship information ID, the UE can also determine the value of the closed loop index used to provide the value of l through a link to the corresponding PUCCH P0 ID.

[0072] When the UE activates the uplink BWP b for the carrier f of the serving cell c and is provided with the P value for the corresponding PUCCH power adjustment state l through the higher layer O_PUCCH，b，f，c (q u ), given the setting of the value, g b，f，c (i, l) = 0, k = 0, 1, ……, i. When the UE is provided with PUCCH spatial relation information, the UE determines the value of l based on the PUCCH spatial relation information associated with the PUCCH P0 ID corresponding to q u and the closed-loop index value corresponding to l, according to the value of q u .

[0073] q u can also be the PUCCH P0 ID (p0-PUCCH-Id) representing the PUCCH P0 (P0-PUCCH) within the PUCCH P0 set (p0-Set).

[0074] In addition, Equations (3) and (4) are only examples and are not limited thereto. The user terminal only needs to control the transmission power of the PUCCH based on at least one of the parameters exemplified by Equations (3) and (4), which can include additional parameters or omit some parameters. In addition, in the above Equations (3) and (4), the transmission power of the PUCCH is controlled for each activated uplink BWP of a certain carrier of a certain serving cell, but it is not limited thereto. At least a part of the serving cell, carrier, BWP, and power control adjustment state can also be omitted.

[0075] <SRS Transmission Power Control>

[0076] For example, using the index l of the power control adjustment state, the transmission power (P SRS、b，f，c (i, q s , l)) of the SRS in the SRS transmission opportunity (transmission occasion) i related to the activated uplink BWP b of the carrier f of the serving cell c (also referred to as the transmission period, etc.) can also be represented by the following Equation (5). The power control adjustment state can also be referred to as the value of the TPC command based on the power control adjustment state index 1, the cumulative value of the TPC command, or the value based on the closed loop. 1 can also be referred to as the closed-loop index.

[0077] In addition, the SRS transmission opportunity i is the period during which the SRS is transmitted. For example, it can be composed of one or more symbols, one or more time slots, etc.

[0078] [Equation 5]

[0079] Equation (5)

[0080]

[0081] Here, P CMAX，f，c (i) is, for example, the UE maximum output power for carrier f of serving cell c in SRS transmission opportunity i. O_SRS，b，f，c (q s ) is through the activation of UL BWP b for carrier f of serving cell c, and SRS resource set q s Parameters related to the target received power provided by p0 (provided by SRS-ResourceSet and SRS-ResourceSetId) (for example, also referred to as parameters related to the transmit power offset, transmit power offset P0, or target received power parameters, etc.).

[0082] M SRS，b，f，c (i) is the SRS bandwidth represented by the number of resource blocks for SRS transmission opportunity i on activated UL BWP b for carrier f with serving cell c and subcarrier spacing μ.

[0083] α SRS，b，f，c (q s ) by activating UL BWP b and SRS resource set q for serving cell c and carrier f with subcarrier spacing μ s α (e.g., alpha) is provided.

[0084] PL b，f，c (q d ) is the activated DL BWP for serving cell c, and SRS resource set q s , using RS resource index q d The DL path loss estimation value [dB] calculated in the UE (path loss estimation [dB], path loss compensation). RS resource index q d Is the same as SRS resource set q s The associated path loss reference RS (path loss reference RS, path loss measurement DL-RS, for example, provided by pathlossReferenceRS) is an SS / PBCH block index (for example, ssb-Index) or a CSI-RS resource index (for example, csi-RS-Index).

[0085] If the UE is not provided with path loss reference RSs, or before the UE is provided with dedicated higher layer parameters, the UE calculates PL using RS resources obtained from the SS / PBCH blocks used by the UE to obtain the MIB. b，f，c (q d).

[0086] h b，f，c (i, l) is the SRS power control adjustment state of the activated UL BWP for carrier f of serving cell c in SRS transmission opportunity i. When the SRS power control adjustment state setting (e.g., srs-PowerControlAdjustmentStates) indicates the same power control adjustment state for SRS transmission and PUSCH transmission, it is the current PUSCH power control adjustment state f b，f，c On the other hand, when the setting of the SRS power control adjustment state indicates independent power control adjustment states for SRS transmission and PUSCH transmission, and the setting of TPC accumulation is not provided, the SRS power control adjustment state h b，f，c (i) can also be expressed by formula (6).

[0087] [Number 6]

[0088] Formula (6)

[0089]

[0090] Here, δ SRS，b，f，c (m) may also be a TPC command value encoded in a PDCCH with DCI (e.g., DCI format 2_3) in combination with other TPC commands. m＝0 C(Si)-1 δ SRS , b，f，c (m) It can also be on the activated UL BWP b of the carrier f with the serving cell c and the subcarrier spacing μ, at the K of the SRS transmission opportunity i-i0 SRS (i-i0)-1 symbol ago and K of SRS transmission opportunity i SRS (i) The signal received by the UE before the symbol with a concentration (cardinality) C(S i ) is a set of TPC command values ​​S i Here, i0 may also be the K of SRS transmission opportunity i-i0. SRS (i-i0)-1 symbol ago than K of SRS transmission opportunity i SRS (i) The smallest positive integer preceding a code element.

[0091] If SRS transmission is aperiodic, K SRS(i) It may also be the number of symbols in the activated UL BWP b of carrier f of serving cell c after the last symbol of the corresponding PDCCH that triggers the SRS transmission and before the first symbol of the SRS transmission. When the SRS transmission is semi-persistent or periodic, K SRS (i) It can also be the number of symbols N per time slot in the activated UL BWP b of carrier f serving cell c. symb slot K is equal to the product of the minimum value provided by k2 in the PUSCH common configuration information (PUSCH-ConfigCommon) SRS，min The number of code elements.

[0092] In addition, equations (5) and (6) are only examples and are not limited thereto. The user terminal can control the transmission power of the SRS based on at least one parameter illustrated in equations (5) and (6), and may include additional parameters or omit some parameters. In addition, in the above equations (5) and (6), the transmission power of the SRS is controlled for each BWP of a certain carrier of a certain cell, but is not limited thereto. At least a part of the cell, carrier, BWP, and power control adjustment state may also be omitted.

[0093] (TCI, spatial relationship, QCL)

[0094] In NR, research is being conducted on the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) in the UE that controls at least one of a signal and a channel (expressed as signal / channel) based on the transmission configuration indication state (Transmission Configuration Indication state (TCI state)).

[0095] The TCI state may also represent the state of a signal / channel applied to a downlink. A state equivalent to the TCI state of a signal / channel applied to an uplink may also be expressed as a spatial relation.

[0096] The so-called TCI state is information related to Quasi-Co-Location (QCL) of signals / channels, and may also be called spatial reception parameters, spatial relationship information, etc. The TCI state may also be set for the UE per channel or per signal.

[0097] The so-called QCL is an indicator of the statistical properties of a signal / channel. For example, it can also mean that when a certain signal / channel is in a QCL relationship with other signals / channels, it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameter (for example, spatial Rx parameter) is the same among these different multiple signals / channels (at least one of them is QCL).

[0098] In addition, the spatial reception parameter may correspond to the UE's reception beam (eg, reception simulation beam) or may determine the beam based on spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may also be replaced by sQCL (spatial QCL).

[0099] QCL may also be specified in multiple types (QCL types). For example, four QCL types AD may be set, in which the same parameters (or parameter sets) may be assumed to be different, and the parameters (also referred to as QCL parameters) are expressed as follows:

[0100] QCL Type A (QCL-A): Doppler shift, Doppler spread, average delay, and delay spread;

[0101] QCL type B (QCL-B): Doppler shift and Doppler spread;

[0102] QCL type C (QCL-C): Doppler shift and average delay;

[0103] QCL type D (QCL-D): spatial reception parameters.

[0104] The UE assumes that a certain Control Resource Set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) relationship with other CORESETs, channels or reference signals, which may also be referred to as QCL assumption.

[0105] The UE may also determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) of the signal / channel based on the TCI status or QCL assumption of the signal / channel.

[0106] The TCI state may be, for example, information related to the QCL between the channel being the object (in other words, the reference signal (RS) used for the channel) and other signals (for example, other RS). The TCI state may also be set (indicated) by high-layer signaling, physical layer signaling, or a combination thereof.

[0107] In the present disclosure, the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

[0108] MAC signaling may also use, for example, MAC Control Element (MAC CE), MAC Protocol Data Unit (MAC Protocol Data Unit (PDU)), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0109] The physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI))).

[0110] The channel for which the TCI state or spatial relationship is set (specified) may be, for example, at least one of a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), and an uplink control channel (Physical Uplink Control Channel (PUCCH)).

[0111] In addition, the RS that is in a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SynchronizationSignal Block (SSB)), a channel state information reference signal (CSI-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a reference signal for QCL detection (also called QRS).

[0112] The SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS / PBCH block.

[0113] The UE may also receive setting information of a list of information elements containing TCI states (eg, PDSCH-Config, tci-StatesToAddModList) through higher layer signaling.

[0114] The information element of the TCI state set by high-layer signaling ("TCI-state IE" of RRC) may also include a TCI state ID and one or more QCL information ("QCL-Info"). The QCL information may also include at least one of information related to the RS that forms a QCL relationship (RS relationship information) and information indicating the QCL type (QCL type information). The RS relationship information may also include information such as the index of the RS (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (identifier)), the index of the cell where the RS is located, and the index of the bandwidth part (Bandwidth Part (BWP)) where the RS is located.

[0115] In Rel.15 NR, both the RS of QCL type A and the RS of QCL type D or only the RS of QCL type A can be set to the UE as the TCI state of at least one of PDCCH and PDSCH.

[0116] When TRS is set as RS of QCL type A, it is assumed that TRS is different from the demodulation reference signal (DeModulation Reference Signal (DMRS)) of PDCCH or PDSCH, and the same TRS is periodically transmitted for a long time. UE can measure TRS and calculate average delay, delay spread, etc.

[0117] In the TCI state of the DMRS of the PDCCH or PDSCH, the UE in which the TRS is set as the RS of QCL type A can assume that the DMRS of the PDCCH or PDSCH is the same as the parameters of QCL type A of the TRS (average delay, delay spread, etc.), and therefore can obtain the parameters of type A of the DMRS of the PDCCH or PDSCH (average delay, delay spread, etc.) based on the measurement result of the TRS. When performing channel estimation of at least one of the PDCCH and the PDSCH, the UE can use the measurement result of the TRS to perform more accurate channel estimation.

[0118] A UE to which a QCL type D RS is set can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.

[0119] The RS of QCL type X in the TCI state may also represent an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be referred to as a QCL source of QCL type X in the TCI state.

[0120] <TCI status for PDCCH>

[0121] Information related to the PDCCH (or the DMRS antenna port associated with the PDCCH) and the QCL of a certain RS may also be referred to as the TCI state for the PDCCH, etc.

[0122] The UE may also determine the TCI state for the UE-specific PDCCH (CORESET) based on higher layer signaling. For example, one or more (K) TCI states may be set for each CORESET for the UE through RRC signaling.

[0123] The UE may also activate one of the multiple TCI states set by RRC signaling for each CORESET through a MAC CE. The MAC CE may also be referred to as a TCI State Indication for UE-specific PDCCH MAC CE. The UE may also monitor the CORESET based on the activated TCI state corresponding to the CORESET.

[0124] <TCI status for PDSCH>

[0125] Information related to the PDSCH (or the DMRS antenna port associated with the PDSCH) and the QCL of a certain DL-RS may also be referred to as the TCI state for the PDSCH, etc.

[0126] The UE may also be notified (set) of M (M≥1) TCI states for PDSCH (QCL information for M PDSCHs) through higher layer signaling. In addition, the number M of TCI states set for the UE may also be limited by at least one of the UE capability and the QCL type.

[0127] The DCI used in the scheduling of the PDSCH may also include a field indicating the TCI state for the PDSCH (for example, it may also be referred to as a TCI field, a TCI state field, etc.). The DCI may also be used for scheduling the PDSCH of a cell, for example, it may also be referred to as DL DCI, DL allocation, DCI format 1_0, DCI format 1_1, etc.

[0128] Whether the TCI field is included in the DCI can also be controlled by information notified to the UE from the base station. The information can also be information indicating whether the TCI field is present or absent in the DCI (for example, TCI presence information, TCI presence information in DCI, and high-layer parameter TCI-PresentInDCI). The information can also be set to the UE through high-layer signaling, for example.

[0129] When more than 8 types of TCI states are set for the UE, MAC CE can also be used to activate (or specify) less than 8 types of TCI states. The MAC CE can also be called UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE). The value of the TCI field in the DCI can also represent one of the TCI states activated by the MAC CE.

[0130] When the UE is set to "valid (enabled)" TCI existence information for the CORESET that schedules PDSCH (the CORESET used in the PDCCH transmission that schedules PDSCH), the UE can also assume that the TCI field exists in the DCI format 1_1 of the PDCCH sent on the CORESET.

[0131] When TCI existence information is not set for the CORESET that schedules the PDSCH, or when the PDSCH is scheduled through DCI format 1_0, when the time offset between the reception of DL DCI (DCI that schedules the PDSCH) and the reception of the PDSCH corresponding to the DCI is greater than a threshold, in order to determine the QCL of the PDSCH antenna port, the UE may also assume that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied to the CORESET used in the PDCCH transmission that schedules the PDSCH.

[0132] When TCI presence information is set to "enabled", when the TCI field in the DCI in the component carrier (CC) of the scheduling (PDSCH) indicates the activated TCI state in the scheduled CC or DL ​​BWP and the PDSCH is scheduled via DCI format 1_1, in order to determine the QCL of the PDSCH antenna port, the UE may also use the TCI with DCI and following the value of the TCI field in the detected PDCCH. When the time offset between the reception of the DL DCI (scheduling the PDSCH) and the PDSCH corresponding to the DCI (the PDSCH scheduled via the DCI) is greater than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell and the RS in the TCI state associated with the QCL type parameter provided by the indicated TCI state are QCL.

[0133] In the case where the UE is configured with a single time slot PDSCH, the indicated TCI state may also be based on the activated TCI state in the time slot with the scheduled PDSCH. In the case where the UE is configured with multiple time slot PDSCHs, the indicated TCI state may also be based on the activated TCI state in the initial time slot with the scheduled PDSCH, and the UE may also expect it to be the same across time slots with scheduled PDSCHs. In the case where the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE sets the TCI existence information to "valid" for the CORESET, and when at least one of the TCI states set for the service cell scheduled by the search space set includes QCL type D, the UE may also assume that the time offset between the detected PDCCH and the PDSCH corresponding to the PDCCH is greater than the threshold.

[0134] In RRC connection mode, in both cases where the TCI information in the DCI (high-layer parameter TCI-PresentInDCI) is set to "enabled" and where the TCI information in the DCI is not set, when the time offset between the reception of the DL DCI (DCI that schedules the PDSCH) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than a threshold, the UE may also assume that: the DM-RS port of the PDSCH of the serving cell, the RS associated with the QCL parameter used in the QCL indication of the PDCCH of the CORESET with the smallest (lowest) CORESET-ID in the latest (most recent, latest) time slot monitored by the UE for one or more CORESETs in the activated BWP of the serving cell and associated with the monitored search space is QCL ( Figure 1 ). This RS may also be referred to as the default TCI state of the PDSCH or the default QCL assumption of the PDSCH.

[0135] The time offset between the reception of DL DCI and the reception of the PDSCH corresponding to the DCI may also be referred to as a scheduling offset.

[0136] In addition, the above-mentioned threshold may also be referred to as the time length for QCL (duration (time duration)), "timeDurationForQCL", "threshold (Threshold)", "threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI" (Threshold for offset between a DCI indicating a TCIstate and a PDSCH scheduled by the DCI)", "Threshold-Sched-Offset", scheduling (schedule) offset threshold, scheduling (scheduling) offset threshold, etc.

[0137] The QCL time length may also be based on UE capabilities, for example, based on the delay required for decoding of the PDCCH and beam switching. The QCL time length may also be the minimum time required by the UE for PDCCH reception and application of spatial QCL information received in the DCI for PDSCH processing. The QCL time length may be expressed as a number of symbols per subcarrier interval or as a time (e.g., μs). The information on the QCL time length may be reported from the UE to the base station as UE capability information or may be set to the UE from the base station using higher layer signaling.

[0138] For example, the UE may also assume that the DMRS port of the PDSCH is QCL with the DL-RS, which is a DL-RS in a TCI state activated for the CORESET corresponding to the minimum CORESET-ID. The latest time slot may also be a time slot for receiving the DCI for scheduling the PDSCH.

[0139] Alternatively, CORESET-ID may be an ID (an ID for identifying CORESET, controlResourceSetId) set by the RRC information element "ControlResourceSet".

[0140] In the case where no CORESET is configured for a CC, the default TCI state may also be the activated TCI state with the lowest ID that can be applied to the PDSCH within the activated DL BWP of the CC.

[0141] After Rel.16, when the PDSCH and the PDCCH that schedules it are located in different component carriers (CC) (cross-carrier scheduling), when the delay from PDCCH to PDSCH (PDCCH-to-PDSCH delay) is shorter than the time length for QCL, or when there is no TCI state in the DCI used for the scheduling, the UE can also obtain the QCL assumption for the scheduled PDSCH with the activated TCI state with the lowest ID from the PDSCH in the activated BWP that can be applied to the scheduled cell.

[0142] <Spatial Relationship for PUCCH>

[0143] The UE may also be configured with parameters (PUCCH configuration information, PUCCH-Config) used in PUCCH transmission through higher layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information may also be configured for each partial band (e.g., uplink bandwidth part (Bandwidth Part (BWP))) within a carrier (also referred to as a cell, component carrier (CC)).

[0144] The PUCCH configuration information may also include a list of PUCCH resource set information (eg, PUCCH-ResourceSet) and a list of PUCCH spatial relationship information (eg, PUCCH-SpatialRelationInfo).

[0145] The PUCCH resource set information may also include a list (eg, resourceList) of PUCCH resource indices (IDs, eg, PUCCH-ResourceId).

[0146] In addition, when the UE does not have dedicated PUCCH resource setting information (e.g., dedicated PUCCH resource configuration) provided through PUCCH resource set information in the PUCCH setting information (before RRC setting), the UE can also determine the PUCCH resource set based on parameters (e.g., pucch-ResourceCommon) in system information (e.g., System Information Block Type 1 (SIB1)) or remaining minimum system information (Remaining Minimum System Information (RMSI)). The PUCCH resource set may also include 16 PUCCH resources.

[0147] On the other hand, when the UE has the above-mentioned dedicated PUCCH resource setting information (UE-dedicated uplink control channel structure, dedicated PUCCH resource structure) (after RRC setting), the UE can also determine the PUCCH resource set according to the number of UCI information bits.

[0148] The UE may also determine the number of CCEs (N) in the control resource set (CORESET) for receiving the PDCCH carrying the DCI based on the value of a field (e.g., a PUCCH resource indicator field) in the downlink control information (downlink control information (DCI)) (e.g., DCI format 1_0 or 1_1 used in the scheduling of the PDSCH), and the number of CCEs (N) in the control resource set (CORESET) for receiving the PDCCH carrying the DCI. CCE ), and the index of the beginning (first) CCE of the PDCCH received (n CCE,0 ) to determine at least one of the PUCCH resource sets (for example, a PUCCH resource set determined cell-specifically or UE-specifically) a PUCCH resource (index) within the above-mentioned PUCCH resource set (for example, a PUCCH resource set determined cell-specifically or UE-specifically).

[0149] The PUCCH spatial relationship information (eg, "PUCCH-spatialRelationInfo" of the RRC information element) may also indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. The PUCCH spatial relationship information may also indicate the spatial association between RS (reference signal) and PUCCH.

[0150] 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, an index of the PUCCH spatial relationship information (ID, for example, pucch-SpatialRelationInfoId), an index of the serving cell (ID, for example, servingCellId), and at least one of the information related to the RS (reference RS) that has a spatial relationship with the PUCCH.

[0151] For example, the information related to the RS may also be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), or an SRS resource ID and an ID of a BWP. The SSB index, the CSI-RS index, and the SRS resource ID may also be associated with at least one of the beam, resource, and port selected by measuring the corresponding RS.

[0152] In the case where more than one piece of spatial relation information related to the PUCCH is set, the UE may perform control so that one piece of PUCCH spatial relation information becomes active for one PUCCH resource at a certain time based on a PUCCH spatial relation activation / deactivation MAC CE.

[0153] The PUCCH spatial relationship activation / deactivation MAC CE of Rel-15 NR can also be expressed using octets (Octet, Oct) 1-3, a total of 3 octets (8 bits×3=24 bits).

[0154] The MAC CE may also include information such as the serving cell ID ("Serving Cell ID" field) of the application object, the BWP ID ("BWP ID" field), and the PUCCH resource ID ("PUCCH Resource ID" field).

[0155] In addition, the MAC CE contains "S i ”(i=0-7) field. i When the field indicates 1, the UE activates the spatial relationship information of the spatial relationship information ID#i. i When the field indicates 0, the UE deactivates the spatial relationship information of the spatial relationship information ID#i.

[0156] The UE may activate the PUCCH spatial relationship information specified by the MAC CE 3 ms after sending a positive acknowledgement (ACK) to the MAC CE for activating the PUCCH spatial relationship information.

[0157] <Spatial Relationship for SRS and PUSCH>

[0158] The UE may also receive information (SRS configuration information, for example, parameters in "SRS-Config" of the RRC control element) used in transmitting a measurement reference signal (for example, a sounding reference signal (SRS)).

[0159] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, for example, "SRS-Resource" of the RRC control element).

[0160] One SRS resource set may also be associated with several SRS resources (several SRS resources may also be grouped). Each SRS resource may also be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0161] The SRS resource set information may 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.

[0162] Here, the SRS resource type may also represent any one of periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic SRS (Aperiodic SRS (A-SRS, AP-SRS)). In addition, the UE may also periodically (or periodically after activation) send P-SRS and SP-SRS, and send A-SRS based on the SRS request of the DCI.

[0163] In addition, the purpose (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") may be, for example, beam management (beamManagement), codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching (antennaSwitching), etc. The SRS for codebook-based transmission or non-codebook-based transmission may also be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0164] For example, in the case of codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). In the case of non-codebook-based transmission, the UE may also determine the precoder for PUSCH transmission based on SRI.

[0165] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, send comb, SRS resource mapping (for example, time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), jump association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0166] The spatial relationship information of SRS (e.g., "spatialRelationInfo" of RRC information element) may also indicate the spatial relationship information between a reference signal and SRS. The reference signal may 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 (e.g., other SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0167] The spatial relationship information of SRS may also include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the reference signal.

[0168] In addition, in the present disclosure, the SSB index, SSB resource ID, and SSBRI (SSB resource indicator) may also be replaced with each other. In addition, the CSI-RS index, CSI-RS resource ID, and CRI (CSI-RS resource indicator) may also be replaced with each other. In addition, the SRS index, SRS resource ID, and SRI may also be replaced with each other.

[0169] The spatial relationship information of SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned reference signal.

[0170] In NR, the transmission of uplink signals can also be controlled based on the presence or absence of beam correspondence (BC). The so-called BC can also be, for example, the ability of a certain node (for example, a base station or UE) to determine the beam used for sending signals (transmit beam, Tx beam) based on the beam used for receiving signals (receive beam, Rx beam).

[0171] In addition, BC can also be called transmit / receive beam correspondence (Tx / Rx beam correspondence), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated / non-calibrated (Calibrated / Non-calibrated), reciprocity calibrated / non-calibrated (reciprocity calibrated / non-calibrated), correspondence, consistency, etc.

[0172] For example, in the absence of BC, the UE may also send uplink signals (e.g., PUSCH, PUCCH, SRS, etc.) using the same beam (spatial domain transmit filter) as the SRS (or SRS resources) indicated from the base station based on the measurement results of one or more SRS (or SRS resources).

[0173] On the other hand, in the presence of BC, the UE may also send uplink signals (e.g., PUSCH, PUCCH, SRS, etc.) using a beam (spatial domain receive filter) that is the same as or corresponds to the beam (spatial domain receive filter) used in the reception of SSB or CSI-RS (or CSI-RS resources).

[0174] When the UE is configured with spatial relationship information related to SSB or CSI-RS and SRS for a certain SRS resource (for example, when there is BC), the SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as the spatial domain filter (spatial domain receive filter) used for receiving the SSB or CSI-RS. In this case, the UE may also assume that the UE receive beam of the SSB or CSI-RS is the same as the UE transmit beam of the SRS.

[0175] When the UE is configured with spatial relationship information related to other SRS (reference SRS) and the SRS (target SRS) for a certain SRS (target SRS) resource (for example, when there is no BC), the target SRS resource may be transmitted using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) used for transmitting the reference SRS. That is, in this case, the UE may also assume that the UE transmission beam of the reference SRS is the same as the UE transmission beam of the target SRS.

[0176] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a field (e.g., SRS resource identifier (SRI) field) in the DCI (e.g., DCI format 0_1). Specifically, the UE may also use the spatial relationship information of the SRS resource determined based on the value of the field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0177] In the case of codebook-based transmission for PUSCH, the UE may be configured with two SRS resources through RRC, and one of the two SRS resources may be indicated through DCI (1-bit field). In the case of non-codebook-based transmission for PUSCH, the UE may be configured with four SRS resources through RRC, and one of the four SRS resources may be indicated through DCI (2-bit field). In order to use a spatial relationship other than the two or four spatial relationships configured by RRC, RRC reconfiguration is required.

[0178] In addition, DL-RS can be set for the spatial relationship of SRS resources used in PUSCH. For example, for SP-SRS, the UE can be set with the spatial relationship of multiple (e.g., up to 16) SRS resources through RRC, and one of the multiple SRS resources can be indicated through MAC CE.

[0179] (Default spatial relationship and default path loss refer to RS)

[0180] In a certain frequency range (e.g., frequency range (FR)) 2), when spatial relationship information for a dedicated PUCCH (PUCCH based on a dedicated PUCCH setting (PUCCH-Config)) or a dedicated SRS (SRS based on a dedicated SRS setting (SRS-Config)) other than an SRS with beam management usage (usage = 'beamManagement') is not set, a default spatial relationship may be applied to the dedicated PUCCH or dedicated SRS in the CC, at least in a specific case. The specific case may also be a case where a path loss reference RS is not set through RRC signaling.

[0181] For example, in the case where CORESET is set on the 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 (default path loss reference RS) may also be the RS of QCL type D of the same 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.

[0182] For example, when no CORESET is set on a CC, the default spatial relationship may also be the activated TCI state with the lowest ID of the PDSCH in the activated DL-BWP that can be applied to the CC. The default path loss reference RS may also be the RS of QCL type D of the same TCI state. The RS used in the path loss calculation may also be a periodic RS.

[0183] The default spatial relationship can also be applied to UEs that support beam correspondence. The default spatial relationship can also be applied to single TRP scenarios.

[0184] When the path loss reference RS for SRS is not set, CORESET is not set, and at least one activated TCI state is not set for PDSCH, the path loss reference RS for SRS (default path loss reference RS) may also be the RS of QCL type D of the activated TCI state of the lowest ID of PDSCH. The path loss reference RS may also be a periodic RS.

[0185] When the path loss reference RS for SRS is not set, CORESET is not set, and there is no activated TCI state on the CC for PDSCH, the path loss reference RS for SRS (default path loss reference RS) can also be determined in the same way as Rel.15 (it can also be the RS resources from the SS / PBCH block used to obtain the MIB).

[0186] In Rel.16, for UEs supporting the function of default spatial relation for dedicated PUSCH, the default spatial relation and default path loss reference RS for PUSCH scheduled via DCI format 0_0 are being studied when there are no PUCCH resources on the activated UL BWP set within the CC in FR2 in RRC connected mode. The default spatial relation may also be the TCI state or QCL assumption of the CORESET with the lowest ID. The default path loss reference RS may also be the RS of QCL type D of the same TCI state or QCL assumption of the CORESET with the lowest ID. The default path loss reference RS may also be a periodic RS.

[0187] Research is underway to support scheduling of PUSCH via DCI format 0_0 in CCs within FR2 in RRC connected mode, where PUCCH resources are configured and no spatial relationship is configured for all PUCCH resources. The spatial relationship and path loss reference RS for PUSCH scheduled via DCI format 0_0 may also follow the spatial relationship and path loss reference RS for PUCCH resources. The spatial relationship and path loss reference RS for PUCCH resources may also be the default spatial relationship and default path loss reference RS for PUCCH.

[0188] The PUCCH configuration of the RRC information element (PUCCH-Config, dedicated PUCCH configuration) may also include a list (spatialRelationInfoToAddModList) of PUCCH spatial relationship information (PUCCH-SpatialRelationInfo) used in the spatial configuration for PUCCH and the configuration of PUCCH power control parameters, and PUCCH power control information (PUCCH-PowerControl) used in the configuration of UE-specific power control parameters for PUCCH. The PUCCH power control information may also include a set (p0-Set) of P0 (P0-PUCCH), a list (pathlossReferenceRSs) of path loss reference RS (PUCCH-PathlossReferenceRS), and at least one of information indicating whether two PUCCH power adjustment states are maintained (twoPUCCH-PC-AdjustmentStates). The PUCCH spatial relationship information includes the ID in the list of path loss reference RS (PUCCH-PathlossReferenceRS-Id), the ID in the P0 set (P0-PUCCH-Id), and the closed loop index (closedLoopIndex, 0 or 1) indicating the PUCCH power adjustment state.

[0189] That is, when the PUCCH spatial relationship information is not set, P0 and closed-loop index for PUCCH are not set.

[0190] The PDCCH configuration (PDCCH-Config) may also include a PUCCH TPC command configuration (PUCCH-TPC-CommandConfig) used in the configuration for extracting the PUCCH TPC command from the group transmission power control (TPC) message on the DCI. The PUCCH TPC command configuration is configured differently from the PUCCH path loss reference RS and spatial relationship information.

[0191] The SRS configuration (SRS-Config, dedicated SRS configuration information) of the RRC information element may also include at least one of a list of SRS resource sets (SRS-ResourceSet) (srs-ResourceSetToAddModList) and a list of SRS resources (SRS-Resource) (srs-ResourceToAddModList). The SRS resource set may also include at least one of a list of SRS resource IDs (SRS-ResourceId) (srs-ResourceIdList), α (alpha), P0 (p0), a path loss reference RS (pathlossReferenceRS), and information indicating the SRS power control adjustment state (srs-PowerControlAdjustmentStates). The SRS resource information may also include SRS spatial relationship information (SRS-SpatialRelationInfo).

[0192] That is, even if the SRS spatial relationship information is not set for the SRS resource, the power control parameter (at least one of α, P0, and closed-loop index) can be set for the SRS resource set.

[0193] The PUSCH configuration (PUSCH-Config, dedicated PUSCH configuration) of the RRC information element may also include PUSCH power control information (PUSCH-PowerControl) used in the configuration of UE-specific power control parameters for PUSCH. The PUSCH power control information may also include a list (p0-AlphaSets) of P0-alpha sets (P0-PUSCH-AlphaSet), a list (pathlossReferenceRSToAddModList) of path loss reference RSs (PUSCH-PathlossReferenceRS), information indicating whether two PUSCH power adjustment states are maintained (twoPUSCH-PC-AdjustmentStates), and a list (sri-PUSCH-MappingToAddModList) of code points and power control parameter mappings (SRI-PUSCH-PowerControl) of the SRI field in the DCI. The P0-alpha set may also include at least one of P0 (p0) and α (alpha).

[0194] That is, even if the path loss reference RS or SRS spatial relationship information for PUSCH is not set, the power control parameters (at least one of α, P0, and closed-loop index) can be set.

[0195] In Rel.16, the introduction of new high-level (RRC) parameters for the validation of the default spatial relationship (beam) for UL transmission and the UE operation for the default path loss reference RS is being studied. For example, at least one of a new high-level parameter (enableDefaultBeamPlForPUSCH0_0) for PUSCH scheduled by DCI format 0_0, a new high-level parameter (enableDefaultBeamPlForPUCCH) for dedicated PUCCH, and a new high-level parameter (enableDefaultBeamPlForPUCCH) for SRS may also be introduced.

[0196] In Rel.15, in the case where the UE is not provided with PUCCH-SpatialRelationInfo, the UE may also obtain the p0-PUCCH-Value from the P0-PUCCH with a p0-PUCCH-Id equal to 0 in p0-set. In the case where the PUSCH transmission is scheduled via DCI format 0_0 or via DCI format 0_1 ​​without the SRI field, or in the case where SRI-PUSCHPowerControl is not provided to the UE, j=2, and the UE determines P according to the value of the initial p0-Pusch-AlphaSet in p0-alphaSets. O_PUSCH，b，f，c (j) Even when the path loss reference RS and the spatial relationship for the PUSCH scheduled by DCI format 0_0 are not set, the UE can determine the power control parameter.

[0197] However, it is unclear how the UE determines power control parameters such as P0, α, closed-loop index, etc. when the path loss reference RS and spatial relationship for PUCCH are not set.

[0198] In addition, for PUSCH scheduled by DCI format 0_1, when the SRS resource corresponding to the purpose of CB or NCB does not have a spatial relationship, or when the SRS resource corresponding to the purpose of CB or NCB is not set, the UE uses the default spatial relationship for the spatial relationship of PUSCH. However, it is unclear how to determine the path loss reference RS for PUSCH.

[0199] Therefore, the inventors of the present invention have conceived a method of determining power control parameters even when the spatial relationship is not set.

[0200] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods according to the embodiments may be applied individually or in combination.

[0201] In the present disclosure, cell, CC, carrier, BWP, and frequency band may be used interchangeably.

[0202] In the present disclosure, index, ID, indicator, and resource ID may also be interchangeable.

[0203] In the present disclosure, specific UL transmission, specific UL signal, specific type of UL transmission, specific UL channel, PUSCH, PUCCH, SRS, P-SRS, SP-SRS, A-SRS may also be replaced with each other. In the present disclosure, specific DL signal, specific DL resource, specific type of DL transmission, specific DL transmission, specific DL reception, specific DL channel, PDSCH, PDCCH, CORESET, DL-RS, SSB, CSI-RS may also be replaced with each other.

[0204] 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 assumed by TCI state or QCL, RS of QCL type A assumed by TCI state or QCL may 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, and CSI-RS may also be replaced with each other.

[0205] In the present disclosure, the TCI state may also be information related to the receiving beam (spatial domain receiving filter) indicated (set) for the UE (e.g., DL-RS, QCL type, cell to which the DL-RS is transmitted, etc.). The QCL assumption may also be information related to the receiving beam (spatial domain receiving filter) assumed by the UE based on the transmission or reception of the associated signal (e.g., PRACH) (e.g., DL-RS, QCL type, cell to which the DL-RS is transmitted, etc.).

[0206] In the present disclosure, the latest time slot, the most recent time slot, the latest search space, and the most recent search space may also be replaced with each other. In the present disclosure, the lowest ID, the highest ID, and the specific ID may also be replaced with each other. For example, the CORESET with the lowest ID, the CORESET with the highest ID, and the CORESET with the specific ID may also be replaced with each other. For example, the activated TCI state with the lowest ID, the activated TCI state with the highest ID, and the activated TCI state with the specific ID may also be replaced with each other.

[0207] In the present disclosure, spatial relationship, spatial relationship information, spatial relationship assumption, QCL parameters, spatial domain transmit filter, UE spatial domain transmit filter, spatial domain filter, UE transmit beam, UL transmit beam, UL precoding, UL precoder, RS of spatial relationship, DL-RS, QCL assumption, SRI, SRI-based spatial relationship, and UL TCI can also be replaced with each other.

[0208] In the present disclosure, the default TCI state, the default QCL, and the default QCL assumption may also be interchangeable. In the following, the TCI state or QCL (QCL assumption) is mainly expressed as the default TCI state, but the name is not limited to this. In addition, the definition of the default TCI state is not limited to this. The default TCI state may be, for example, a TCI state assumed when the TCI state / QCL specified by DCI cannot be used for a certain channel / signal (for example, PDSCH), or a TCI state assumed when the TCI state / QCL is not specified (or set).

[0209] In the present disclosure, the default spatial relationship, the default spatial relationship assumption, the RS of the QCL of a specific DL resource, the TCI state or QCL assumption of a specific DL resource, the TCI state or QCL assumption of a specific DL signal, the RS related to the QCL parameters provided by the TCI state or QCL assumption of a specific DL signal, the RS of QCL type D in the TCI state or QCL assumption of a specific DL signal, and the spatial relationship sent by the reference UL may also be replaced with each other.

[0210] In the present disclosure, TRS, tracking CSI-RS, CSI-RS with TRS information (higher layer parameter trs-Info), and NZP-CSI-RS resources in an NZP-CSI-RS resource set with TRS information may also be replaced with each other.

[0211] In the present disclosure, DCI format 0_0, DCI not including SRI, DCI not including indication of spatial relationship, and DCI not including CIF may also be replaced with each other. In the present disclosure, DCI format 0_1, DCI including SRI, DCI including indication of spatial relationship, and DCI including CIF may also be replaced with each other.

[0212] In the present disclosure, path loss reference RS, path loss reference RS, path loss estimation RS, path loss calculation RS, pathloss (PL)-RS, index q d , RS used in path loss calculation, RS resource used in path loss calculation, and calculation RS can also be replaced with each other. Calculation, estimation, and measurement can also be replaced with each other.

[0213] In the present disclosure, "UE sends a specific UL transmission in accordance with a specific spatial relationship", "UE uses a specific spatial relationship in the spatial relationship of a specific UL transmission", "UE assumes (regards) that the spatial relationship of the specific UL transmission is the same as the RS of the specific spatial relationship", and "UE assumes (regards) that the spatial relationship of the specific UL transmission is the same as the RS of QCL type D of the specific spatial relationship" can also be replaced with each other.

[0214] In the present disclosure, the power control parameter may also include at least one of P0, α, closed-loop index, and path loss reference RS.

[0215] (Wireless Communication Method)

[0216] <Implementation Method 1>

[0217] like Figure 2 As shown, when the spatial relationship (spatial relationship information) for the PUCCH is set (S10: Yes (Y)), the UE may determine the spatial relationship and power control parameters for the PUCCH based on the spatial relationship information (S20).

[0218] When the spatial relationship (spatial relationship information) for PUCCH is not set (S10: No (N)), the UE can determine the default spatial relationship of PUCCH or determine the power control parameters of PUCCH according to any of the following operations 1-1, 1-2, and 1-3 (S30).

[0219] In at least one of the case where the corresponding higher layer parameter is activated and the case where the corresponding UE capability is reported, the UE may also apply implementation mode 1. The higher layer parameter may also be any one of enableDefaultBeamPlForPUCCH and enableDefaultBeamPlForSRS.

[0220] 《Operation 1-1》

[0221] New parameters (fields, higher layer parameters, RRC information elements, MACCE) for setting power control parameters for PUCCH may also be introduced independently from the spatial relationship information (PUCCH-SpatialRelationInfo). The UE may also apply this parameter to PUCCH if at least one of the following conditions is met: the spatial relationship for PUCCH is not set, enableDefaultBeamPlForPUCCH (valid) is set, and the UE capability corresponding to enableDefaultBeamPlForPUCCH is reported.

[0222] 《Operation 1-2》

[0223] In the case where the power control parameters for PUSCH on the BWP or CC are set, the UE may also apply the power control parameters for PUSCH to PUCCH. In the case where one value of the power control parameter for PUSCH (e.g., one P0-α set, one closed-loop index) is set, the UE may also use the value set for PUSCH for PUCCH. In the case where multiple values ​​of the power control parameter for PUSCH (e.g., multiple P0-α sets, multiple closed-loop indices) are set, the UE may apply the value of the initial or last power control parameter to PUCCH, or the value of the power control parameter used in the most recent PUSCH transmission on the activated BWP or CC to PUCCH.

[0224] 《Operation 1-3》

[0225] When the power control parameter of SRS on BWP or CC is set, the UE may also apply the power control parameter of SRS to PUCCH. When one value of the power control parameter (a set of P0 and Alpha) is set for PUSCH, or when one SRS resource is set, the UE may also use the value set for SRS for PUCCH. When multiple values ​​of the power control parameter (multiple sets of P0 and Alpha) are set for SRS, or when multiple SRS resource sets are set, the UE may apply the value of the power control parameter in the SRS resource set with the lowest or highest ID to PUCCH, the value of the power control parameter corresponding to the SRS resource with the lowest or highest ID to PUCCH, the value of the power control parameter corresponding to the SRS resource set (SRS resource) with CB or NCB purpose to PUCCH, and the value of the power control parameter used in the most recent SRS transmission on the activated BWP or CC to PUCCH.

[0226] In at least one of operations 1-2 and 1-3, when there is no power control parameter of SRS or PUSCH on the BWP or CC of PUCCH, the power control parameter of SRS or PUSCH on other BWP or CC may be applied to PUCCH.

[0227] According to this embodiment, the network does not need to set spatial relationship information and power control parameters for PUCCH, so the flexibility of scheduling can be improved and overhead can be reduced.

[0228] <Implementation Method 2>

[0229] like Figure 3 As shown, in the case where an SRS resource having a CB or NCB purpose and including a spatial relationship is set corresponding to a PUSCH scheduled by DCI format 0_1 ​​(S40: Yes (Y)), the UE may also determine a spatial relationship and a path loss reference RS for the PUSCH based on the corresponding SRS resource (S50). The SRS resource may also be included in an SRS resource set having a CB or NCB purpose.

[0230] In the case where the PUSCH scheduled via DCI format 0_1 ​​has the purpose of CB or NCB and the SRS resources including the spatial relationship are not set (S40: No (N)), the UE may apply the default spatial relationship to the PUSCH, and the UE may determine the path loss reference RS for the PUSCH by following any one of the following operations 2-1, 2-2, and 2-3 (S60).

[0231] In at least one of the cases where the corresponding high-layer parameters are activated and the corresponding UE capabilities are reported, the UE may also apply implementation mode 2. The high-layer parameter may also be any one of enableDefaultBeamPlForPUCCH, enableDefaultBeamPlForSRS, and a new high-layer parameter. The new high-layer parameter may also indicate the validation of the UE operation of the default spatial relationship and the default path loss reference RS for the PUSCH scheduled through DCI format 0_1.

[0232] 《Operation 2-1》

[0233] The UE may also apply the path loss reference RS set in the PUSCH power control information (PUSCH-PowerControl) to the PUSCH. When multiple path loss reference RSs are set, the UE may also apply the first or last path loss reference RS (the path loss reference RS with the lowest or highest ID) to the PUSCH.

[0234] 《Operation 2-2》

[0235] The UE may also apply the path loss reference RS used in the SRS resource or the default path loss reference RS for the SRS or PUCCH to the PUSCH. The UE may also apply the QCL type D RS of the default spatial relationship applied in the PUSCH to the path loss reference RS of the PUSCH.

[0236] In the case where CORESET is set on the CC, the default path loss reference RS may also be the RS of the TCI state of the CORESET with the lowest ID or the QCL type D assumed by the QCL.

[0237] When no CORESET is set on the CC and at least one activated TCI state is set for PDSCH, the default path loss reference RS may also be the RS of QCL type D of the activated TCI state with the lowest ID for PDSCH. The default path loss reference RS may also be a periodic RS.

[0238] When CORESET is not set and there is no activated TCI state on the CC for PDSCH, the default path loss reference RS can also be determined in the same way as Rel.15 (it can also be the RS resources from the SS / PBCH block used to obtain the MIB).

[0239] 《Operation 2-3》

[0240] The UE may also apply the path loss reference RS for PUCCH to the path loss reference RS for PUSCH. The applied path loss reference RS may be the path loss reference RS of the PUCCH resource with the lowest or highest ID, or the path loss reference RS with the lowest or highest ID for PUCCH.

[0241] 《Operation 2-4》

[0242] The UE may perform operation 2-1 when the PUSCH power control information (PUSCH-PowerControl) is set, and may perform operation 2-2 or 2-3 when the PUSCH power control information is not set.

[0243] According to this embodiment, the network does not need to set the spatial relationship information and power control parameters for the PUSCH scheduled through DCI format 0_1, so the flexibility of scheduling can be improved and the overhead can be reduced.

[0244] (Wireless Communication System)

[0245] 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 any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0246] Figure 4 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0247] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0248] In EN-DC, the base station (eNB) of LTE (E-UTRA) is the master node (Master Node (MN)), and the base station (gNB) of NR is the secondary node (Secondary Node (SN)). In NE-DC, the base station (gNB) of NR is the MN, and the base station (eNB) of LTE (E-UTRA) is the SN.

[0249] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) where both MN and SN are NR base stations (gNB)).

[0250] The wireless communication system 1 may also include: a base station 11 that forms a macro cell C1 with a relatively wide coverage, and a base station 12 (12a-12c) that is configured in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the method shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.

[0251] The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

[0252] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to this. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0253] Furthermore, the user terminal 20 may perform communication in each CC by using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0254] Multiple base stations 10 may also be connected by wire (e.g., optical fiber based on Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as a backhaul, the base station 11 equivalent to the upper station may also be referred to as an Integrated Access Backhaul (IAB) donor, and the base station 12 equivalent to a relay station may also be referred to as an IAB node.

[0255] The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The core network 30 may also include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0256] The user terminal 20 may also be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.

[0257] In the wireless communication system 1, a wireless access method based on orthogonal frequency division multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), cyclic prefix OFDM (CP-OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. may be used.

[0258] The radio access scheme may also be referred to as a waveform. In addition, in the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be applied to the UL and DL radio access schemes.

[0259] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0260] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0261] The PDSCH is used to transmit user data, high-layer control information, system information block (SIB), etc. The PUSCH is also used to transmit user data, high-layer control information, etc. In addition, the PBCH is also used to transmit the master information block (MIB).

[0262] The lower layer control information may also be transmitted via the PDCCH. The lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of the PDSCH and the PUSCH.

[0263] In addition, the DCI that schedules the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI that schedules the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be replaced by DL data, and the PUSCH may also be replaced by UL data.

[0264] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0265] A search space may also correspond to PDCCH candidates that are consistent with one or more aggregation levels. One or more search spaces may also be referred to as a search space set. In addition, the "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting" and the like in the present disclosure may also be interchangeable.

[0266] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.) and scheduling request (Scheduling Request (SR)) may also be transmitted through PUCCH. Random access preambles for establishing a connection with a cell may also be transmitted through PRACH.

[0267] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0268] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0269] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0270] In addition, in the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a measurement reference signal (Sounding Reference Signal (SRS)), a demodulation reference signal (DMRS), etc. can also be transmitted. In addition, DMRS can also be called a user terminal specific reference signal (UE-specific Reference Signal).

[0271] (Base Station)

[0272] Figure 5 1 is a diagram showing an example of a structure of a base station involved in one embodiment. The base station 10 includes a control unit 110, a transmitting and receiving unit 120, a transmitting and receiving antenna 130, and a transmission path interface (transmission line interface) 140. In addition, the control unit 110, the transmitting and receiving unit 120, the transmitting and receiving antenna 130, and the transmission path interface 140 may each be provided with more than one.

[0273] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0274] The control unit 110 controls the entire base station 10. The control unit 110 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0275] The control unit 110 may also control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may also control transmission and reception, measurement, etc. using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. The control unit 110 may also generate data, control information, sequences, etc. to be sent as signals, and forward them to the transmission and reception unit 120. The control unit 110 may also perform call processing (setting, release, etc.) of communication channels, state management of the base station 10, management of wireless resources, etc.

[0276] The transmitting and receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measuring unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting and receiving unit 120 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0277] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0278] The transmitting / receiving antenna 130 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0279] The transmitting and receiving unit 120 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0280] 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 transmitting beam and a receiving beam.

[0281] The sending and receiving unit 120 (sending processing unit 1211), for example, may also perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (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.

[0282] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, 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.

[0283] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0284] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 130 .

[0285] For the obtained baseband signal, the sending and receiving unit 120 (receiving processing unit 1212) can also apply analog-to-digital conversion, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, etc. to obtain user data, etc.

[0286] The transmitting and receiving unit 120 (measuring unit 123) may also implement measurements related to the received signal. For example, the measuring unit 123 may also perform radio resource management (Radio Resource Management (RRM)) measurements, channel state information (CSI) measurements, etc. based on the received signal. The measuring unit 123 may also measure received power (e.g., reference signal received power (Reference Signal Received Power (RSRP))), received quality (e.g., reference signal received quality (Reference Signal Received Quality (RSRQ)), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal to noise ratio (Signal to Noise Ratio (SNR))), signal strength (e.g., received signal strength indicator (ReceivedSignal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0287] The transmission path interface 140 can also send and receive signals (return signaling) between devices included in the core network 30, other base stations 10, etc., and can also obtain and transmit user data (user plane data) and control plane data for the user terminal 20.

[0288] In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 120 , the transmitting and receiving antenna 130 , and the transmission path interface 140 .

[0289] (User Terminal)

[0290] Figure 6 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may be provided in one or more portions.

[0291] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0292] The control unit 210 controls the entire user terminal 20. The control unit 210 can be composed of a controller, a control circuit, and the like that are described based on the common knowledge in the technical field to which the present disclosure relates.

[0293] The control unit 210 may also control signal generation, mapping, etc. The control unit 210 may also control transmission and reception, measurement, etc. using the transmission and reception unit 220 and the transmission and reception antenna 230. The control unit 210 may also generate data, control information, sequences, etc. to be transmitted as signals, and forward them to the transmission and reception unit 220.

[0294] The transmitting and receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measuring unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting and receiving unit 220 may be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting and receiving circuit, etc., which are described based on the public knowledge in the technical field involved in the present disclosure.

[0295] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0296] The transmitting / receiving antenna 230 can be constituted by an antenna described based on the common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0297] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0298] The transmitting and receiving unit 220 may also use digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), etc. to form at least one of a transmitting beam and a receiving beam.

[0299] The sending and receiving unit 220 (sending processing unit 2211) can also perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), etc. on the data, control information, etc. obtained from the control unit 210 to generate a bit string to be sent.

[0300] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may also include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be sent, and output a baseband signal.

[0301] In addition, whether to apply DFT processing may also be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is activated (enabled), the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform. Otherwise, the transmitting and receiving unit 220 (transmitting processing unit 2211) may also perform DFT processing as the above-mentioned transmission processing without performing DFT processing.

[0302] The transmitting and receiving unit 220 (RF unit 222 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 230 .

[0303] On the other hand, the transmitting and receiving unit 220 (RF unit 222 ) may perform amplification, filter processing, demodulation to a baseband signal, etc. on the signal in the radio frequency band received by the transmitting and receiving antenna 230 .

[0304] The sending and receiving unit 220 (receiving processing unit 2212) can also apply analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the obtained baseband signal to obtain user data, etc.

[0305] The transmitting and receiving unit 220 (measuring unit 223) may also perform measurements related to the received signal. For example, the measuring unit 223 may also perform RRM measurements, CSI measurements, etc. based on the received signal. The measuring unit 223 may also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

[0306] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be constituted by at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0307] When the spatial relationship information for uplink transmission of either the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) scheduled by the downlink control information (DCI format 0_1) is not set, the control unit 210 may also determine the power control parameter for the uplink transmission, and determine the transmission power of the uplink transmission based on the power control parameter. The transmitting and receiving unit 220 may also use the transmission power to perform the uplink transmission.

[0308] In the case where the uplink transmission is the PUCCH, the power control parameter may be any one of a parameter set by a field independent of the PUCCH spatial relationship information, a parameter for power control of the PUSCH, and a parameter for power control of a sounding reference signal (SRS).

[0309] In the case where the uplink transmission is a PUSCH scheduled through the DCI format 0_1, the power control parameter may be any one of a first reference signal for path loss reference set in the PUSCH power control information, a second reference signal for path loss reference used in the SRS resource, a third reference signal for path loss reference when the reference signal for path loss reference for SRS or PUCCH is not set, and a fourth reference signal for path loss reference for PUCCH.

[0310] When the uplink transmission is a PUSCH scheduled through the DCI format 0_1 ​​and the first reference signal is not set in the PUSCH power control information, the control unit 210 may also use any one of the second reference signal, the third reference signal and the fourth reference signal for the power control parameter.

[0311] When a higher-layer parameter indicating a default spatial relationship and validation of a path loss reference RS is set and the spatial relationship information is not set, the control unit 210 may determine a power control parameter for the uplink transmission.

[0312] (Hardware Structure)

[0313] In addition, the block diagram used in the description of the above-mentioned embodiment shows a block of a functional unit. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, by wired, wireless, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining the above-mentioned one device or the above-mentioned multiple devices with software.

[0314] Here, the functions include judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural unit) that implements a sending function may also be referred to as a transmitting unit, a transmitter, etc. Any one of them is as described above, and the implementation method is not particularly limited.

[0315] For example, a base station, a user terminal, etc. in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 7 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0316] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be used interchangeably. The hardware structure of the base station 10 and the user terminal 20 can be configured to include one or more of the devices shown in the figure, or to exclude some of the devices.

[0317] For example, only one processor 1001 is shown, but there may be multiple processors. In addition, the processing may be performed by one processor, or may be performed by two or more processors simultaneously, sequentially, or in other ways. In addition, the processor 1001 may also be implemented by one or more chips.

[0318] The functions of the base station 10 and the user terminal 20 are realized, for example, by reading specific software (program) into hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls communication via the communication device 1004, or controls at least one of the reading and writing of data in the memory 1002 and the storage 1003.

[0319] The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), the sending and receiving unit 120 (220), etc. may also be implemented by the processor 1001.

[0320] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be achieved for other functional blocks.

[0321] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), and other appropriate storage media. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 can store executable programs (program codes), software modules, etc. for implementing the wireless communication method involved in one embodiment of the present disclosure.

[0322] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other appropriate storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0323] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0324] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, a light emitting diode (LED) lamp, etc.). In addition, the input device 1005 and the output device 1006 may also be an integrated structure (e.g., a touch panel).

[0325] In addition, the processor 1001, the memory 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured as a single bus or may be configured as different buses between the devices.

[0326] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0327] (Variation Example)

[0328] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may also be replaced with terms having the same or similar meanings. For example, channels, code elements, and signals (signals or signaling) may also be replaced with each other. In addition, a signal may also be a message. A reference signal may also be referred to as RS, and may also be referred to as a pilot, a pilot signal, etc. depending on the standard applied. In addition, a component carrier (CC) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

[0329] A wireless frame may also be composed of one or more periods (frames) in the time domain. Each period (frame) of the one or more periods (frames) constituting a wireless frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0330] Here, the parameter set may also refer to a communication parameter applied in at least one of the transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of the subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, wireless frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, specific windowing processing performed by the transmitter and receiver in the time domain, etc.

[0331] A time slot may also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. In addition, a time slot may also be a time unit based on a parameter set.

[0332] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as a PDSCH (PUSCH) mapping type B.

[0333] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also be referred to by their respective names. In addition, time units such as frames, subframes, time slots, mini-time slots, and symbols in the present disclosure may also be interchangeable.

[0334] For example, a subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and a time slot or a mini time slot may also be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may also be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0335] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station schedules each user terminal to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited to this.

[0336] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0337] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0338] A TTI having a time length of 1 ms may also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0339] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0340] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0341] In addition, an RB may also include one or more symbols in the time domain, and may also be the length of a slot, a mini-slot, a subframe, or a TTI. A TTI, a subframe, etc. may also be composed of one or more resource blocks, respectively.

[0342] In addition, one or more RBs may also be referred to as a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, an RB pair, etc.

[0343] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0344] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0345] 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 in one carrier.

[0346] At least one of the configured BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, the "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0347] In addition, the above-mentioned structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0348] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​relative to a specific value, or other corresponding information. For example, wireless resources may also be indicated by a specific index.

[0349] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. In addition, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present 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 limiting in all respects.

[0350] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0351] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0352] The input and output information, signals, etc. may be stored in a specific location (e.g., a memory), or may be managed using a management table. The input and output information, signals, etc. may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be sent to other devices.

[0353] The notification of information is not limited to the methods / implementations described in the present disclosure, and may also be performed by other methods. For example, the notification of information in the present disclosure may also be implemented through physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI))), high-layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB)), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals or a combination thereof.

[0354] In addition, physical layer signaling may also be referred to as layer 1 / layer 2 (Layer 1 / Layer 2 (L1 / L2)) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. In addition, RRC signaling may also be referred to as an RRC message, such as an RRC connection establishment (RRC Connection Setup) message, an RRC connection reconstruction (RRC Connection Reconfiguration) message, etc. In addition, MAC signaling may also be notified using, for example, a MAC control element (MACControl Element (CE)).

[0355] Furthermore, notification of specific information (eg, notification of “it is X”) is not limited to explicit notification, but may be performed implicitly (eg, by not notifying the specific information or by notifying other information).

[0356] The determination can be made by a value represented by a 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).

[0357] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0358] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when the software is sent from a website, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0359] The terms "system" and "network" used in the present disclosure can be used interchangeably. "Network" may also refer to a device (eg, a base station) included in the network.

[0360] In the present disclosure, terms such as "precoding", "precoder", "weight (precoding weight)", "Quasi-Co-Location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" can be used interchangeably.

[0361] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0362] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provides communication services within the coverage area.

[0363] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0364] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or some other appropriate terminology.

[0365] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device carried in a mobile body, a mobile body, etc. The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous driving vehicle, etc.), or 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 when performing a communication operation. For example, at least one of the base station and the mobile station may also be an Internet of Things (IoT) device such as a sensor.

[0366] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, the various methods / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0367] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0368] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations 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, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0369] The various methods / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the method is executed. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be reversed in order as long as they are not contradictory. For example, for the methods described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0370] The various modes and implementation modes described in the present disclosure may 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, and next-generation systems expanded based on them. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0371] The term “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the term “based on” means both “based only on” and “based at least on”.

[0372] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used, or that the first element must take precedence over the second element in some form.

[0373] The term "determining" used in this disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0374] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0375] In addition, "judgment (decision)" can also refer to situations where resolving, selecting, choosing, establishing, comparing, etc. are considered as "judgment (decision)". In other words, "judgment (decision)" can also refer to situations where some actions are considered as "judgment (decision)".

[0376] In addition, “judgment (decision)” can also be replaced by “assuming (assuming)”, “expecting (expecting)”, “considering (considering)” and so on.

[0377] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be replaced by "access".

[0378] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0379] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0380] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0381] In the present disclosure, when an article is added by translation like a, an, and the in English, for example, the present disclosure may also include a case where the noun following the article is in plural form.

[0382] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: a receiving unit, receiving a downlink control information format (DCI format) for scheduling a physical uplink shared channel (PUSCH) and a medium access control element (MAC CE) related to a power control parameter for a physical uplink control channel (PUCCH); and a control unit that, when a sounding reference signal resource (SRS resource) corresponding to the PUSCH does not include spatial relationship information, determines a spatial relationship of the SRS based on a reference signal of a QCL type representing a spatial reception parameter as a quasi-co-location parameter (QCL parameter) in a transmission configuration indication state (TCI state) for downlink reception, and uses the spatial relationship for a spatial relationship of the PUSCH, In a case where the spatial relationship for the PUCCH is not set, the control unit determines the power control parameter based on the MAC CE, and applies the power control parameter to transmission of the PUCCH.

2. The terminal according to claim 1, wherein: In a case where the SRS resource does not include the spatial relationship information and a reference signal for path loss estimation of the SRS resource is not set, the control unit estimates the path loss of the PUSCH based on the reference signal.

3. The terminal according to claim 1, wherein: In a case where more than one control resource sets are configured for the cell of the PUSCH, the TCI state is a TCI state of a control resource set having a lowest ID among the more than one control resource sets.

4. The terminal according to claim 1, wherein: When a control resource set is not configured for the cell of the PUSCH, the TCI state is an activated TCI state of the lowest ID for the physical downlink shared channel, namely, PDSCH.

5. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving a downlink control information format (DCI format) for scheduling a physical uplink shared channel (PUSCH) and a medium access control control element (MAC CE) related to a power control parameter for a physical uplink control channel (PUCCH); and In a case where a sounding reference signal resource (SRS resource) corresponding to the PUSCH does not include spatial relationship information, a step of determining a spatial relationship of the SRS based on a reference signal of a QCL type representing a spatial reception parameter as a quasi-co-location parameter (QCL parameter) in a transmission configuration indication state (TCI state) for downlink reception, and using the spatial relationship for a spatial relationship of the PUSCH, In a case where the spatial relationship for the PUCCH is not set, the power control parameter is determined based on the MAC CE, and the power control parameter is applied to the transmission of the PUCCH.

6. A base station, comprising: a transmitting unit, transmitting a downlink control information format (DCI format) for scheduling a physical uplink shared channel (PUSCH) and a medium access control element (MAC CE) related to a power control parameter for a physical uplink control channel (PUCCH); and a control unit for controlling reception of the PUSCH transmitted using a spatial relationship of a reference signal of a QCL type representing a spatial reception parameter based on a quasi-co-location parameter (QCL parameter) in a transmission configuration indication state (TCI state) for downlink reception, when a sounding reference signal resource (SRS resource) corresponding to the PUSCH does not include spatial relationship information, The control unit controls reception of the PUCCH transmitted from a terminal by applying the power control parameter in a case where a spatial relationship for the PUCCH is not set.

7. A system comprising a terminal and a base station, The terminal has: a receiving unit, receiving a downlink control information format (DCI format) for scheduling a physical uplink shared channel (PUSCH) and a medium access control element (MAC CE) related to a power control parameter for a physical uplink control channel (PUCCH); and a control unit that, when a sounding reference signal resource (SRS resource) corresponding to the PUSCH does not include spatial relationship information, determines a spatial relationship of the SRS based on a reference signal of a QCL type representing a spatial reception parameter as a quasi-co-location parameter (QCL parameter) in a transmission configuration indication state (TCI state) for downlink reception, and uses the spatial relationship for a spatial relationship of the PUSCH, In a case where the spatial relationship for the PUCCH is not set, the control unit determines the power control parameter based on the MAC CE, and applies the power control parameter to the transmission of the PUCCH, The base station sends the DCI format and the MAC CE to the terminal.

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