Terminal and wireless communication method

Abstract

A terminal according to one embodiment of the present disclosure includes: a control unit that uses a quasi-co-location (QCL) parameter based on a specific downlink signal for a spatial relationship of the specific uplink signal when a reference signal (RS) for a path loss reference for the specific uplink signal is not set; and a transmission unit that transmits the specific uplink signal using the spatial relationship. According to one embodiment of the present disclosure, the QCL parameter can be appropriately determined.

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 of the Third Generation Partnership Project (3GPP)).

[0003] The subsequent systems of LTE (for example, also called 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 (such as NR), research is underway to control transmission and reception processing by user terminals (terminal, user terminal, User Equipment (UE)) based on information related to Quasi-Co-Location (QCL)).

[0009] However, how to determine the QCL parameters for receiving downlink (DL) signals or transmitting uplink (UL) signals has not yet been determined. If the UE cannot operate with appropriate QCL parameters, there is a risk of reduced system performance such as reduced throughput.

[0010] Therefore, one of the objects of the present disclosure is to provide a terminal and a wireless communication method for appropriately determining QCL parameters.

[0011] Means for solving problems

[0012] A terminal according to one embodiment of the present disclosure has: when a reference signal (RS) for path loss reference for a specific uplink signal is not set, a quasi co-location (QCL) parameter based on a specific downlink signal is used for a spatial relationship of the specific uplink signal; and

[0013] The sending unit sends the specific uplink signal by utilizing the spatial relationship.

[0014] Effects of the Invention

[0015] According to one embodiment of the present disclosure, QCL parameters can be appropriately determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram showing an example of QCL assumption for PDSCH.

[0017] Figure 2 This is a diagram showing an example of application conditions of the default spatial relationship.

[0018] Figure 3 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0019] Figure 4 This is a diagram showing an example of the structure of a base station involved in one embodiment.

[0020] Figure 5 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0021] Figure 6 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] <Transmit power control for PUSCH>

[0024] In NR, the transmission power of PUSCH is controlled based on the TPC command (also called value, increase or decrease value, correction value, etc.) represented by the value of a specific field (also called TPC command field, etc.) in DCI.

[0025] For example, when the UE transmits PUSCH on the activated UL BWP b of the carrier f of the serving cell c using the parameter set (open-loop parameter set) with index j and the power control adjustment state (PUSCH power control adjustment state) with index l, the transmission power (P) of the PUSCH in the PUSCH transmission occasion (transmission occasion) (also referred to as the transmission period, etc.) i is PUSCH、b,f,c (i,j,q d ,l)) can also be expressed 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 accumulated value of the TPC command, or the value using the closed loop. l can also be referred to as the closed loop index.

[0026] Furthermore, the PUSCH transmission opportunity i is a period during which the PUSCH is transmitted, and may be composed of, for example, one or more symbols, one or more time slots, and the like.

[0027] [Formula 1]

[0028] Formula (1)

[0029] Here, P CMAX,f,c(i) For example, P is the transmission power (also referred to as maximum transmission power, UE maximum output power, etc.) of the user terminal configured for carrier f of serving cell c for transmission timing i. O_PUSCH,b,f,c (j) is a parameter related to the target reception power of the activated UL BWP b of the carrier f of the serving cell c set for transmission opportunity i (also referred to as, for example, a parameter related to the transmission power offset, the transmission power offset P0, a target reception power parameter, etc.).

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

[0031] PL b,f,c (qd ) 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 a downlink BWP 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.

[0032] 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 separate higher layer parameters, the UE may also calculate the PL using the RS resources from the synchronization signal (SS) / physical broadcast channel (PBCH) block (SS block (SSB)) used to obtain the master information block (MIB) b,f,c (q d ).

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

[0034] 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 that used for the corresponding PRACH transmission. d .

[0035] When the UE is provided with a setting for power control of the PUSCH using a sounding reference signal (SRS) resource indicator (SRI) (e.g., SRI-PUSCH-PowerControl) and is provided with one or more values ​​of the ID of the path loss reference RS, the mapping between the set of values ​​for the SRI field in DCI format 0_1 ​​and the set of ID values ​​of the path loss reference RS can also be obtained by higher layer signaling (e.g., sri-PUSCH-PowerControl-Id in SRI-PUSCH-PowerControl). The UE can also determine the RS resource index q from the ID of the path loss reference RS mapped to the SRI field value in DCI format 0_1 ​​for scheduling the PUSCH. d .

[0036] In the case where PUSCH transmission is scheduled by DCI format 0_0 and the UE does not provide PUCCH spatial relationship 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 .

[0037] In the case where PUSCH transmission is scheduled via DCI format 0_0 and the UE does not provide spatial settings for PUCCH transmission, or in the case where PUSCH transmission is scheduled via DCI format 0_1 ​​without an SRI field, or in the case where the UE is not provided with settings for power control of PUSCH using SRI, the UE may also utilize the RS resource index qd with the ID of the reference RS having zero path loss.

[0038] For a PUSCH transmission configured by configuring a grant configuration (e.g., ConfiguredGrantConfig), when the grant configuration includes a specific parameter (e.g., rrc-ConfiguredUplinkGrant), the RS resource index q may also be provided to the UE via a path loss reference index (e.g., pathlossReferenceIndex) within the specific parameter. d .

[0039] For PUSCH transmission configured by configuring the grant configuration, when the grant configuration does not contain specific parameters, the UE may also determine the RS resource index q from the value of the path loss reference RS ID mapped to the SRI field in the DCI format for activating PUSCH transmission. dIn 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 .

[0040] 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.

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

[0042] [Formula 2]

[0043] Formula (2)

[0044]

[0045] Here, δ PUSCH,b,f,c (i,l) can also be the TPC command value contained in DCI format 0_0 or DCI format 0_1 ​​of the PUSCH transmission opportunity i on the activated UL BWP b of the carrier f scheduling the service cell c, or the TPC command value 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).

[0046] 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 value set D i The total number of TPC command values ​​in D i It can also be the K of the UE for PUSCH power control adjustment state l on the activated UL BWP b of carrier f in serving cell c for PUSCH transmission opportunity i-i0 PUSCH (i-i0)-1 symbol ago, K corresponding to PUSCH transmission timing i PUSCH (i) The set of TPC command values ​​received between the previous symbol. i0 can also be the K of PUSCH transmission opportunity i-i0. PUSCH K before PUSCH transmission opportunity i (i-i0) symbol ago PUSCH(i) The smallest positive integer before a symbol.

[0047] If PUSCH transmission is scheduled by DCI format 0_0 or DCI format 0_1, K PUSCH (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 by the corresponding PDCCH and before the first symbol transmitted by the corresponding PUSCH. If PUSCH transmission is configured by configuring the grant structure information (ConfiguredGrantConfig), K PUSCH (i) It can also be the number of symbols per time slot N in the activated UL BWP b of carrier f of serving cell c. symb slot , and K equal to the product of the minimum value provided by k2 in the PUSCH common configuration information (PUSCH-ConfigCommon) PUSCH,min The number of code elements.

[0048] The power control adjustment state may also have multiple states (e.g., 2 states) or a single state through high-level parameter settings. In addition, when multiple power control adjustment states are set, one of the multiple power control adjustment states may also be identified by an index l (e.g., l∈{0,1}).

[0049] In addition, equations (1) and (2) are only examples and are not limited to this. The user terminal can control the transmission power of PUSCH based on at least one parameter illustrated in equations (1) and (2), and may include additional parameters or omit some parameters. In addition, in the above equations (1) and (2), the transmission power of PUSCH is controlled for each activated UL BWP of a certain carrier of a certain service cell, but it is not limited to this. At least part of the service cell, carrier, BWP, and power control adjustment state may also be omitted.

[0050] <Transmit power control for PUCCH>

[0051] In addition, in NR, the transmission power of PUCCH is controlled based on the TPC command (also called value, increase or decrease value, correction value, instruction value, etc.) indicated by the value of a specific field (also called TPC command field, 1st field, etc.) within DCI.

[0052] 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 formula (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 using the closed loop. l can also be referred to as the closed loop index.

[0053] 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.

[0054] [Formula 3]

[0055] Formula (3)

[0056]

[0057] Here, P CMAX,f,c(i) For example, P is the transmission power (also called maximum transmission power, UE maximum output power, etc.) of the user terminal set for carrier f of serving cell c at transmission timing i. O_PUCCH,b,f,c (q u ) is a parameter related to the target receiving power of the activated UL BWP b of the carrier f of the service cell c set for sending opportunity i (also called, for example, a parameter related to the sending power offset, the sending power offset P0, or a target receiving power parameter, etc.).

[0058] M PUCCH RB,b,f,c (i) is the number of resource blocks (bandwidth) allocated to the PUCCH for transmission opportunity i in the activated UL BWP b for 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.

[0059] If the UE does not provide a path loss reference RS (pathlossReferenceRSs), or before the UE provides a separate high-level parameter, the UE calculates the path loss PL using the RS resources obtained from the SS / PBCH block used by the UE to obtain the MIB. b,f,c (q d ).

[0060] If the UE does not provide path loss reference RS information (pathlossReferenceRSs in PUCCH power control information (PUCCH-PowerControl)) and does not provide PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), the UE obtains the value of the reference signal (referencesignal) in the PUCCH path loss reference RS from 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 on the same serving cell, or if given, on the serving cell instructed by the value of the path loss reference linking information (pathlossReferenceLinking). The path loss reference linking information indicates which DL of the special cell (SpCell) and the secondary cell (SCell) corresponding to the UL that the UE applies as the path loss reference. SpCell can also be 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 (such as CSI-RS structure or SS / PBCH block) used for PUCCH path loss estimation.

[0061] Δ F_PUCCH (F) is a high-level parameter given 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.

[0062] g b,f,c(i, l) 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, value using closed loop, PUCCH power adjustment state). b,f,c (i,l) can also be expressed by formula (4).

[0063] g b,f,c (i, l) is the PUCCH power control adjustment state of the activated UL BWP b of the carrier f of the serving cell c for the transmission opportunity i. b,f,c (i,l) can also be expressed by formula (4).

[0064] [Formula 4]

[0065] Formula (4)

[0066]

[0067] Here, δ PUCCH,b,f,c (i,l) is the TPC command value, and may also be included in DCI format 1_0 or DCI format 1_1 detected by the UE at the PUCCH transmission timing i of the activated ULBWP b of the carrier f of the serving cell c, or encoded in combination with other TPC commands in DCI format 2_2 with a CRC scrambled by a specific RNTI (Radio Network Temporary Identifier) ​​(e.g., 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 ) of the TPC command value set C i The total number of TPC command values ​​in C i It can also be the K of the UE for PUCCH power control adjustment state l in the PUCCH transmission opportunity i-i0 of the activated UL BWP b of the carrier f of the serving cell c. PUCCH (i-i0)-1 symbol ago, K corresponding to PUSCH transmission timing i PUCCH (i) The set of TPC command values ​​received between the symbols before. i0 can also be the K of PUSCH transmission opportunity i-i0. PUCCH K before PUSCH transmission opportunity i (i-i0) symbol ago PUCCH (i) The smallest positive integer before a symbol.

[0069] If PUCCH transmission corresponds to detection of DCI format 1_0 or DCI format 1_1 using 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 by the corresponding PDCCH and before the first symbol transmitted by 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 per time slot N in the activated UL BWP b of carrier f of serving cell c. symb slot , and K 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] If the UE provides information indicating the use of two PUCCH power control adjustment states (twoPUCCH-PC-AdjustmentStates) and PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), l={0,1}; if 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 by DCI format 1_0 or 1_1, and if the UE is provided with PUCCH spatial relationship information, the UE may also obtain the mapping between the PUCCH spatial relationship information ID (pucch-SpatialRelationInfoId) value and the closed loop index (closedLoopIndex, power adjustment state index 1) by using 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 may also determine the value of the closed loop index providing the value of 1 through the link to the corresponding PUCCH P0 ID.

[0072] If the UE activates UL BWP b for carrier f of serving cell c, the higher layer provides the P power adjustment state l for the corresponding PUCCH O_PUCCH,b,f,c (q u ) value, g b,f,c(i,l)=0、k=0,1,…,i。 If the UE provides PUCCH spatial relationship information, the UE can also u The corresponding PUCCH P0 ID and the PUCCH spatial relationship information associated with the closed-loop index value corresponding to l are represented by q u The value of l is determined by the value of .

[0073] q u It may be a PUCCH P0 ID (p0-PUCCH-Id) indicating PUCCH P0 (P0-PUCCH) in the PUCCH P0 set (p0-Set).

[0074] In addition, equations (3) and (4) are only examples and are not limited thereto. The user terminal may control the transmission power of the PUCCH based on at least one parameter illustrated in equations (3) and (4), and may 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 UL BWP of a certain carrier of a certain service cell, but the present invention is not limited thereto. At least a part of the service cell, carrier, BWP, and power control adjustment state may also be omitted.

[0075] <Transmit power control for SRS>

[0076] For example, using the index l of the power control adjustment state, the SRS transmission power (P SRS、b,f,c (i,q s ,l)) can also be expressed 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 l, the accumulated value of the TPC command, or the value using the closed loop. l can also be referred to as the closed loop index.

[0077] Furthermore, the SRS transmission opportunity i is a period during which the SRS is transmitted, and may be composed of, for example, one or more symbols, one or more time slots, and the like.

[0078] [Formula 5]

[0079] Formula (5)

[0080]

[0081] Here, P CMAX,f,c (i) is, for example, the UE maximum output power for carrier f of serving cell c at SRS transmission timing i. O_SRS,b,f,c(q s ) is through the activation of UL BWP b, and SRS resource set q for carrier f of serving cell c s Parameters related to the target received power provided by p0 (provided by SRS-ResourceSet and SRS-ResourceSetId) (also referred to as, for example, 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 of 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 by 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 does not provide a path loss reference RS (pathlossReferenceRSs), or before the UE provides a separate high-level parameter, the UE uses the RS resources obtained from the SS / PBCH block used by the UE to obtain the MIB to calculate PL b,f,c (q d ).

[0086] h b,f,c(i, l) is the SRS power control adjustment state of the activated UL BWP of carrier f of serving cell c for 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 SRS power control adjustment state setting indicates independent power control adjustment states for SRS transmission and PUSCH transmission, and no TPC accumulation setting is provided, the SRS power control adjustment state h b,f,c (i) can also be expressed by formula (6).

[0087] [Formula 6]

[0088] Formula (6)

[0089]

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

[0091] If the SRS transmission is aperiodic, KSRS(i) 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. If the SRS transmission is semi-persistent or periodic, K SRS(i) It can also be the number of symbols per time slot N in the activated UL BWP b of carrier f of serving cell c. symb slot K 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 may 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, the reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and the transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) in the UE based on the transmission configuration indication state (TCI state), the control signal, and at least one of the channels (expressed as signal / channel) are being studied.

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

[0096] The TCI state refers to information related to Quasi-Co-Location (QCL) of signals / channels, and may also be referred to as spatial reception parameters, spatial relationship information, etc. The TCI state may also be set for each channel or each signal pair of UEs.

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

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

[0099] QCL may also specify multiple types (QCL types). For example, four QCL types AD may be set with different parameters (or parameter sets) that can be assumed to be the same. The following is an illustration of the parameters (also referred to as QCL parameters):

[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 expansion,

[0102] QCL Type C (QCL-C): Doppler shift and average delay,

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

[0104] The relationship that the UE assumes that a specific control resource set (CORESET), channel or reference signal is in a specific QCL (e.g., QCL type D) with another CORESET, channel or reference signal 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 also be information related to the QCL of the target channel (in other words, the reference signal (RS) used for the channel) and another signal (such as another 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, high-layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Media Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

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

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

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

[0111] In addition, the RS that forms 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 sounding reference signal (SRS), a tracking CSI-RS (also called Tracking Reference Signal (TRS)), and a QCL detection reference signal (also called QRS).

[0112] The SSB is at least one signal block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The SSB may also be referred to as an SS / PBCH block.

[0113] The information element of the TCI state set by high-level signaling (RRC's "TCI-state IE") may also include 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 (e.g., SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier, indicator)), the index of the cell where the RS is located, and the index of the Bandwidth Part (BWP, bandwidth part) where the RS is located.

[0114] In Rel.15NR, as at least one TCI state in PDCCH and PDSCH, both QCL type A RS and QCL type D RS, or only QCL type A RS, can be set for the UE.

[0115] When TRS is set as the RS of QCL type A, TRS is different from the demodulation reference signal (DMRS) of PDCCH or PDSCH, and it is assumed that the same TRS is transmitted periodically over a long period of time. UE can measure TRS and calculate average delay, delay spread, etc.

[0116] The UE for which the TRS is set as the QCL type A RS for the TCI state of the DMRS of the PDCCH or PDSCH can assume that the parameters (average delay, delay spread, etc.) of the QCL type A of the DMRS of the PDCCH or PDSCH are the same as those of the TRS, and can therefore obtain the parameters (average delay, delay spread, etc.) of the type A of the DMRS of the PDCCH or PDSCH based on the measurement result of the TRS. When the UE estimates at least one channel of the PDCCH and the PDSCH, it can use the measurement result of the TRS to perform a more accurate channel estimation.

[0117] The UE that sets the QCL type D RS can use the QCL type D RS to determine the UE reception beam (spatial reception filter, UE spatial reception filter).

[0118] The RS of QCL type X in the TCI state may also refer to an RS that is in a QCL type X relationship with a certain channel / signal (DMRS), and the RS may also be called a QCL source of QCL type X in the TCI state.

[0119] <TCI status for PDCCH>

[0120] The PDCCH (or the DMRS antenna port associated with the PDCCH) and the information related to the QCL of a specific RS may also be referred to as the TCI state for the PDCCH, etc.

[0121] The UE may also determine the UE-specific TCI state for PDCCH (CORESET) based on the higher layer signaling. For example, for the UE, one or more (K) TCI states may be set for each CORESET through RRC signaling.

[0122] The UE may also activate one of the multiple TCI states set by RRC signaling for each CORESET through MAC CE. The MAC CE may also be called 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.

[0123] <TCI status for PDSCH>

[0124] The PDSCH (or the DMRS antenna port associated with the PDSCH) and the information related to the QCL of a specific DL-RS may also be referred to as the TCI state for the PDSCH, etc.

[0125] The UE may also notify (set) M (M≥1) TCI states for PDSCH (QCL information for M PDSCHs) through high-layer signaling. In addition, the number M of TCI states set in the UE may also be limited by at least one of the UE capability and the QCL type.

[0126] The DCI used for scheduling PDSCH may also include a specific field indicating the TCI state for the PDSCH (may also be referred to as, for example, a TCI field, a TCI state field, etc.). The DCI may also be used for scheduling PDSCH of one cell, and may also be referred to as, for example, DL DCI, DL assignment (downlink assignment), DCI format 1_0, DCI format 1_1, etc.

[0127] Whether the TCI field is included in the DCI may also be controlled by information notified by the base station to the UE. The information may also be information indicating whether the TCI field (present or absent) is present in the DCI (e.g., TCI presence information, TCI presence information in DCI, high-layer parameter TCI-PresentInDCI). The information may also be set in the UE, for example, through high-layer signaling.

[0128] When more than 8 TCI states are set in the UE, MAC CE can also be used to activate (or specify) less than 8 TCI states. The MAC CE can also be called UE-specific PDSCH TCI state activation / deactivation MAC CE (TCIStates 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.

[0129] When the UE sets TCI existence information to "enabled" for the CORESET that schedules the PDSCH (the CORESET that is used to send the PDCCH that schedules the PDSCH), the UE may also assume that the TCI field exists in the DCI format 1_1 of the PDCCH sent on the CORESET.

[0130] 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 the DL DCI (DCI that schedules the PDSCH) and the reception of the PDSCH corresponding to the DCI is greater than a threshold, the UE may also assume that in order to determine the QCL of the PDSCH antenna port, the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption applied to the CORESET that sends the PDCCH used to schedule the PDSCH.

[0131] When TCI presence information is set to "enabled", the TCI field in the DCI in the component carrier (CC) of the scheduled (PDSCH) indicates the activated TCI state in the scheduled CC or DL ​​BWP, and when the PDSCH is scheduled by DCI format 1_1, the UE may also use the TCI with the DCI and according to the value of the TCI field in the detected PDCCH to determine the QCL of the PDSCH antenna port. When the time offset between the reception of the DL DCI (scheduling the PDSCH) and the PDSCH corresponding to the DCI (PDSCH scheduled by the DCI) is greater than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell is QCL with the RS in the TCI state associated with the QCL type parameter given by the instructed TCI state.

[0132] In the case where the UE is set to a single time slot PDSCH, the instructed 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 set to multiple time slot PDSCHs, the instructed 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 the same across time slots with the scheduled PDSCH. In the case where the UE is set to a CORESET associated with a search space set for cross-carrier scheduling, the UE may also assume that the TCI existence information is set 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.

[0133] In RRC connection mode, when the TCI information in the DCI (high-layer parameter TCI-PresentInDCI) is set to "enabled" and when the TCI information is not set in the DCI, when the time offset between the reception of the DL DCI (DCI scheduling the PDSCH) and the corresponding PDSCH (PDSCH scheduled by the DCI) is lower than a threshold, the UE may also assume that the DM-RS port of the PDSCH of the serving cell and the RS associated with the QCL parameter of the QCL instruction of the CORESET for the PDCCH are QCL, wherein one or more CORESETs within the activated BWP of the serving cell have the smallest (lowest) CORESET-ID in the latest (most recent) time slot monitored by the UE, and are associated with the monitored search space (monitoredsearch space) ( 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.

[0134] 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.

[0135] In addition, the above threshold may also be referred to as QCL time duration, "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and aPDSCH scheduled by the DCI", "Threshold-Sched-Offset", scheduling offset threshold, scheduling offset threshold, etc.

[0136] The QCL duration may also be based on UE capabilities, for example, it may also be based on the delays taken for decoding of the PDCCH and beam switching. The QCL duration may also be the minimum time required for the UE to receive the PDCCH and apply the spatial QCL information received in the DCI for PDSCH processing. The QCL duration may also be expressed as a number of symbols for each subcarrier spacing, or as a time (e.g., μs). The information on the QCL duration may also be reported by the UE to the base station as UE capability information, or may be set by the base station to the UE using high-layer signaling.

[0137] For example, the UE may also assume that the DMRS port of the PDSCH and the DL-RS based on the TCI state activated for the CORESET corresponding to the smallest CORESET-ID are QCL. The latest time slot may also be, for example, a time slot for receiving the DCI scheduling the PDSCH.

[0138] In addition, CORESET-ID may be an ID (an ID for identifying CORESET) set by the RRC information element "ControlResourceSet".

[0139] In Rel.16 and later, when the PDSCH and the PDCCH that schedules it are in different component carriers (CCs) (cross-carrier scheduling), if the PDCCH-to-PDSCH delay is shorter than the QCL duration, or if the TCI state does not exist in the DCI used for the scheduling, the UE can also obtain the QCL assumption for the PDSCH in the activated BWP of the cell that can be applied to the scheduling and scheduled by the PDSCH with the activated TCI state with the lowest ID.

[0140] <Spatial relationship for PUCCH>

[0141] The UE may also configure parameters (PUCCH configuration information, PUCCH-Config) for PUCCH transmission through higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). The PUCCH configuration information may also be configured for a portion of the band (e.g., the uplink bandwidth part (Bandwidth Part (BWP))) within each carrier (also referred to as a cell or component carrier (CC)).

[0142] 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).

[0143] The PUCCH resource set information may also include a list (eg, resourceList) of PUCCH resource indices (IDs, eg, PUCCH-ResourceId).

[0144] In addition, when the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided by the PUCCH resource set information in the PUCCH configuration information (before RRC configuration), the UE may also determine the PUCCH resource set based on parameters (e.g., pucch-ResourceCommon) in system information (e.g., main information block type 1 (System Information Block Type 1 (SIB1)) or minimum system information (Remaining Minimum System Information (RMSI)). The PUCCH resource set may also include 16 PUCCH resources.

[0145] On the other hand, when the UE has the above-mentioned independent PUCCH resource configuration information (UE independent uplink control channel structure, independent PUCCH resource structure) (after RRC configuration), the UE may determine the PUCCH resource set according to the number of UCI information bits.

[0146] The UE may also select a PUCCH resource indicator based on the value of a specific field (e.g., a PUCCH resource indicator field) in the downlink control information (DCI) (e.g., DCI format 1_0 or 1_1 for scheduling PDSCH) and the number of CCEs (N) in the control resource set (CORESET) for PDCCH reception that transports the DCI. CCE ), and the index of the front (initial) CCE received by the PDCCH (n CCE,0 ) determines at least one of the PUCCH resources (index) within the above-mentioned PUCCH resource set (for example, a PUCCH resource set inherent to the cell or determined individually by the UE).

[0147] The PUCCH spatial relationship information (eg, "PUCCH-spatialRelationInfo" of the RRC information element) may also indicate multiple candidate beams (spatial filters) for PUCCH transmission. The PUCCH spatial relationship information may also indicate the spatial relationship between RS (Reference signal) and PUCCH.

[0148] The list of PUCCH spatial relationship information may also include multiple 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, such as pucch-SpatialRelationInfoId), an index of the serving cell (ID, such as servingCellId), and at least one of the information related to the RS (reference RS) that forms a spatial relationship with the PUCCH.

[0149] For example, the information related to the RS may be an SSB index, a CSI-RS index (e.g., an NZP-CSI-RS resource structure ID), 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.

[0150] When more than one piece of spatial relation information related to the PUCCH is set, the UE may be controlled so that one piece of PUCCH spatial relation information is activated for one PUCCH resource at a certain time based on the PUCCH spatial relation activation / deactivation MAC CE.

[0151] The PUCCH spatial relationship activation / deactivation MAC CE of Rel-15 NR is expressed by octets (Octet, Oct) 1-3, totaling 3 octets (8 bits×3=24 bits).

[0152] 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).

[0153] In addition, the MAC CE includes "S i ” (i=0-7) field. The UE is in a certain S i When the field indicates 1, the spatial relationship information of spatial relationship information ID#i is activated. i When the field indicates 0, the spatial relationship information of the spatial relationship information ID#i is deactivated.

[0154] The UE may also activate the PUCCH relationship information specified by the MAC CE 3 ms after sending a positive acknowledgement (ACK) for activating specific PUCCH spatial relationship information.

[0155] <Spatial relationship between SRS and PUSCH>

[0156] The UE may also receive information (SRS configuration information, for example, parameters in the "SRS-Config" of the RRC control element) for transmission of a reference signal for measurement (for example, a sounding reference signal (SRS)).

[0157] Specifically, the UE may also receive at least one of information related to one or more SRS resource sets (SRS resource set information, such as the "SRS-ResourceSet" of the RRC control element) and information related to one or more SRS resources (SRS resource information, such as the "SRS-Resource" of the RRC control element).

[0158] One SRS resource set may be associated with a specific number of SRS resources (or a specific number of SRS resources may be grouped). Each SRS resource may be identified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).

[0159] 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.

[0160] Here, the SRS resource type may also represent any one of periodic SRS (Periodic SRS (P-SRS)), semi-permanent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic SRS (Aperiodic SRS (A-SRS, AP-SRS)). In addition, the UE may also send P-SRS and SP-SRS periodically (or periodically after activation), and send A-SRS based on the SRS request of the DCI.

[0161] 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. SRS for codebook-based or non-codebook-based transmission purposes may also be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.

[0162] For example, when sending based on the codebook, the UE may determine the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). When sending based on non-codebook, the UE may determine the precoder for PUSCH transmission based on SRI.

[0163] SRS resource information may also include SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, sending comb, SRS resource mapping (such as time and / or frequency resource location, resource offset, resource period, number of repetitions, number of SRS code elements, SRS bandwidth, etc.), hopping association information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

[0164] The spatial relationship information of the SRS (e.g., the "spatialRelationInfo" of the RRC information element) may also represent the spatial relationship information between a specific reference signal and the SRS. The specific 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., another SRS). The SS / PBCH block may also be referred to as a synchronization signal block (SSB).

[0165] The spatial relationship information of SRS may also include at least one of the SSB index, CSI-RS resource ID, and SRS resource ID as an index of the above-mentioned specific reference signal.

[0166] 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.

[0167] The spatial relationship information of SRS may also include a serving cell index, a BWP index (BWP ID), etc. corresponding to the above-mentioned specific reference signal.

[0168] In NR, the transmission of uplink signals can also be controlled based on the presence or absence of beam correspondence (BC). BC can also refer to the ability of a certain node (such as 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).

[0169] 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.

[0170] For example, in the absence of BC, the UE can also send uplink signals (such as PUSCH, PUCCH, SRS, etc.) based on the measurement results of more than one SRS (or SRS resources) using the same beam (spatial transmit filter) as the SRS (or SRS resources) instructed by the base station.

[0171] 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 transmit filter) that is the same as or corresponds to the beam (spatial receive filter) used in the reception of a specific SSB or CSI-RS (or CSI-RS resources).

[0172] When the UE sets the spatial relationship information related to the SSB or CSI-RS and the SRS for a certain SRS resource (for example, when there is BC), the UE may also transmit the SRS resource using the same spatial filter (spatial transmit filter) as the spatial filter (spatial 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.

[0173] When the UE sets spatial relationship information related to another SRS (reference SRS) and the SRS (target SRS) for a certain SRS (target SRS) resource (for example, when there is no BC), the UE may also transmit the target SRS resource using the same spatial filter (spatial transmission filter) as the spatial filter (spatial transmission filter) used to transmit 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.

[0174] The UE may also determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a specific 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 specific field (e.g., SRI) (e.g., "spatialRelationInfo" of the RRC information element) for PUSCH transmission.

[0175] In the case of codebook-based transmission for PUSCH, the UE may also set 2 SRS resources through RRC and instruct 1 of the 2 SRS resources through DCI (1-bit specific field). In the case of non-codebook-based transmission for PUSCH, the UE may also set 4 SRS resources through RRC and instruct 1 of the 4 SRS resources through DCI (2-bit specific field). In order to use spatial relationships other than the 2 or 4 spatial relationships set by RRC, RRC reset is required.

[0176] In addition, DL-RS can be configured for the spatial relationship of SRS resources used in PUSCH. For example, for SP-SRS, UE can configure the spatial relationship of multiple (eg, up to 16) SRS resources through RRC and instruct one of the multiple SRS resources through MAC CE.

[0177] (Spatial relationship of PUSCH scheduled by DCI format 0_0)

[0178] DCI format 0_1 ​​includes SRI, but DCI format 0_0 does not include SRI.

[0179] In Rel.15NR, for a PUSCH on a cell scheduled by DCI format 0_0, if the UE is able to use it, it sends the PUSCH according to the spatial relationship corresponding to the dedicated PUCCH resource with the lowest ID within the activated UL BWP of the cell. The dedicated PUCCH resource can also be a PUCCH resource that is set individually for the UE (set by the high-level parameter PUCCH-Config).

[0180] Therefore, for a cell (eg, a secondary cell (SCell)) for which PUCCH resources are not configured, PUSCH cannot be scheduled using DCI format 0_0.

[0181] When PUCCH on SCell is not configured (PUCCH transmitted on SCell), UCI is transmitted on PCell. When PUCCH on SCell is configured, UCI is transmitted on PUCCH-SCell. Therefore, PUCCH resources and spatial relationship information do not need to be configured for all SCells, and there may be cells where PUCCH resources are not configured.

[0182] In addition, DCI format 0_1 ​​includes a carrier indicator field (CIF), but DCI format 0_0 does not include CIF. Therefore, even if PUCCH resources are not set for PCell, cross-carrier scheduling of PUSCH on SCell cannot be performed through DCI format 0_0 on PCell.

[0183] (Default spatial relationship)

[0184] For UE supporting beam correspondence, if in a certain frequency range (e.g., frequency range (FR) 2), except for SRS with beam management purpose (usage = 'beamManagement'), no spatial relationship information for separate PUCCH setting or separate SRS setting is set, the default spatial relationship can also be applied for separate PUCCH setting or separate SRS setting.

[0185] For UEs that do not support beam correspondence, if in a certain frequency range (for example, FR2), except for the SRS for beam management purposes, the default spatial relationship can also be applied for the separate PUCCH setting or the separate SRS setting.

[0186] However, the operation of applying the default spatial relationship is not yet clear. If the default spatial relationship cannot be applied appropriately, there is a risk of reducing system performance such as reduced throughput.

[0187] Therefore, the inventors of the present invention have conceived a method of appropriately applying spatial relationships.

[0188] 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.

[0189] In the present disclosure, spatial relationship, spatial relationship information, spatial relationship assumption, spatial domain transmit filter, UE spatial domain transmit filter, spatial domain filter, UE transmit beam, UL transmit beam, RS of spatial relationship, DL-RS, QCL assumption, SRI, SRI-based spatial relationship, and UL TCI can also be replaced with each other.

[0190] TCI state, TCI state or QCL assumption, QCL assumption, spatial reception filter, UE spatial reception filter, spatial filter, UE reception beam, DL reception beam, DL-RS can also be replaced with each other. RS of QCL type D, DL-RS associated with QCL type D, DL-RS with QCL type D, source of DL-RS, SSB, CSI-RS can also be replaced with each other.

[0191] In the present disclosure, the TCI state may also be information related to the receive beam (spatial receive filter) instructed (set) to the UE (e.g., DL-RS, QCL type, cell that sends DL-RS, etc.). The QCL assumption may also be information related to the receive beam (spatial receive filter) assumed by the UE (e.g., DL-RS, QCL type, cell that sends DL-RS, etc.) based on the transmission or reception of an associated signal (e.g., PRACH).

[0192] In the present disclosure, cell, CC, carrier, BWP, and band may also be replaced with each other.

[0193] In the present disclosure, index, ID, indicator, and resource ID may also be replaced with each other.

[0194] In the present disclosure, specific UL signals, specific types of UL signals, specific UL transmissions, specific UL channels, PUSCH, PUCCH, SRS, P-SRS, SP-SRS, and A-SRS may also be replaced with each other. In the present disclosure, specific DL signals, specific types of DL signals, specific DL receptions, specific DL channels, PDSCH, PDCCH, CORESET, DL-RS, SSB, and CSI-RS may also be replaced with each other.

[0195] In the present disclosure, "UE sends a specific UL signal according to the default spatial relationship", "UE utilizes the default spatial relationship for the spatial relationship of the specific UL signal", "UE assumes (regards) that the spatial relationship of the specific UL signal is the same as the RS of the default spatial relationship", and "UE assumes (regards) that the spatial relationship of the specific UL signal is the same as the RS of QCL type D of the default spatial relationship" can also be replaced with each other.

[0196] In the present disclosure, the default spatial relationship, the default spatial relationship assumption, the TCI state or QCL assumption of a specific DL signal, the RS related to the QCL parameters given 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, the spatial relationship of the reference UL signal, the specific RS, the specific DL RS, and the first reference signal may also be replaced with each other.

[0197] In the present disclosure, the latest time slot and the most recent time slot may also be replaced with each other.

[0198] 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.

[0199] In the present disclosure, DCI format 0_0 may also be replaced by DCI without SRI, DCI without spatial relationship instructions, or DCI without CIF. In the present disclosure, DCI format 0_1 ​​may also be replaced by DCI including SRI, DCI including spatial relationship instructions, or DCI including CIF.

[0200] The path loss reference RS and the path loss reference RS can also be replaced with each other.

[0201] (Wireless Communication Method)

[0202] <Default spatial relationship application conditions>

[0203] When the application conditions shown below are met, the UE may also apply a default spatial relationship to the spatial relationship of a specific UL signal. The specific UL signal may also be at least one of PUSCH, PUCCH, SRS, P-SRS, SP-SRS, and A-SRS.

[0204] The application conditions may also include not setting spatial relationship information for a specific UL signal, the specific UL signal being within a frequency range (e.g., frequency range (FR) 2), a separate PUCCH setting or a separate SRS setting excluding an SRS with a non-codebook-based transmission purpose (usage = 'nonCodebook') based on an SRS with a beam management purpose (usage = 'beamManagement') and an associated CSI-RS (associatedCSI-RS), and the UE supports at least one of beam correspondence. The spatial relationship information for a specific UL signal may also be spatial relationship information within a separate PUCCH setting or a separate SRS setting. The associated CSI-RS may also be an ID (index) of a CSI-RS resource associated with an SRS resource set in non-codebook-based transmission.

[0205] The application condition may also include that a path loss reference RS is not set for a specific UL signal. The application condition may also include that a path loss reference RS is not set for a specific UL signal through a higher layer signaling.

[0206] For example, Figure 2 As shown, in the case where a path loss reference RS is set for a specific UL signal (S10: Yes), the UE may also use the spatial relationship (spatial relationship information) set for the specific UL signal for the specific UL signal (S20). In the case where a path loss reference RS is not set for the specific UL signal (S10: No), the UE may also use the default spatial relationship for the specific UL signal (S30).

[0207] The application condition may also include activating only one TCI state for the PDCCH (the number of activated TCI states for the PDCCH is 1). According to this application condition, the UE operation becomes simple.

[0208] The application condition may also include activating only one TCI state for PDCCH and PDSCH (the number of activated TCI states for PDCCH and PDSCH is 1). When a single activated beam is used for UL and DL, UE operation becomes simple.

[0209] The application conditions may also include that the PDCCH and the PUCCH scheduled by the PDCCH are in the same BWP or the same CC (without cross-carrier scheduling). In the case of cross-carrier scheduling, the UE is not limited to being able to apply the same beam to the PDCCH and the PUCCH, so by excluding cross-carrier scheduling, the UE operation becomes simple. For example, in the case of inter-band carrier aggregation (CA), it can be considered that different beams are applied to the PDCCH and the PUCCH. In addition, for example, in the case of FR1-FR2 CA, if the DCI is in FR1 and the PUCCH or SRS or PUSCH is in FR2, it can be considered that the UE cannot determine the beam.

[0210] The application conditions may also include not utilizing inter-band CA.

[0211] The application condition may include that there is no SRI for the specific UL signal PUSCH. The application condition may include that there is no SRS resource corresponding to the SRI for PUSCH.

[0212] <Default spatial relationship>

[0213] The default spatial relationship may also be a default TCI state or a default QCL assumption for a particular DL signal.

[0214] The default TCI state or default QCL assumption for a specific DL signal, the TCI state of the CORESET with the lowest CORESET ID in the most recent time slot, the RS related to the QCL parameters of the QCL instruction for PDCCH of the CORESET with the lowest CORESET-ID in the latest time slot monitored by the UE and associated with the monitored search space among one or more CORESETs in the activated BWP of the serving cell, the TCI state or QCL assumption of the CORESET with the lowest CORESET-ID in the latest time slot and associated with the monitored search space, the TCI state or QCL assumption of the CORESET with the lowest CORESET-ID in a specific time slot and associated with the monitored search space, the TCI state or QCL assumption of a specific CORESET, the TCI state or QCL assumption of a DL signal corresponding to a specific UL signal (for example, a DL channel that triggers a specific UL signal, a DL channel that schedules a specific UL signal, and a DL channel that schedules a DL channel corresponding to a specific UL signal), and the RS related to the QCL parameters of a specific DL signal (RS that is QCL for a specific DL signal) may also be replaced with each other.

[0215] The latest time slot may also be the latest time slot for a specific DL signal. The latest time slot may also be the latest time slot of the starting symbol (or before the symbol) for a specific UL signal. The latest time slot may also be the latest time slot of the first or last symbol (before the symbol) for the DL signal corresponding to the specific UL signal. For example, when the specific UL signal is PUCCH, the DL signal corresponding to the specific UL signal may also be the PDSCH corresponding to the PUCCH (the PDSCH corresponding to the HARQ-ACK transported on the PUCCH).

[0216] The specific UL signal may also be a PUSCH scheduled by DCI format 0_0. For example, the specific UL signal may also be a PUSCH on the cell scheduled by DCI format 0_0 when a PUCCH resource (e.g., dedicated PUCCH resource) with a spatial relationship (e.g., an activated spatial relationship) is set within the activated UL BWP of the cell.

[0217] The default spatial relationship may be any one of the following default spatial relationships 1 to 5.

[0218] 《Default Spatial Relationship 1》

[0219] The default spatial relationship may also be the default TCI state or the default QCL assumption for PDSCH.

[0220] The default spatial relationship may also be the default TCI state of PDSCH or the default QCL assumption of PDSCH. When CORESET is set on a CC to which the default spatial relationship is applied, the default TCI state of PDSCH or the default QCL assumption of PDSCH may also be the TCI state corresponding to the most recent time slot and the lowest CORESET ID. On a CC to which the default spatial relationship is applied, if no CORESET is set, the default TCI state of PDSCH or the default QCL assumption of PDSCH may be applied to the PDSCH within the activated DL BWP of the CC, or it may be the activated TCI state with the lowest ID.

[0221] The specific DL signal may also be PDSCH.

[0222] Default Spatial Relationship 2

[0223] The default spatial relationship can also be one of the activated TCI states (activated TCI states) of the CORESET.

[0224] It is also possible to activate multiple TCI states for a CORESET. In this case, the activated TCI state selected as the default spatial relationship may also be the default RS, the default TCI state, or the default QCL assumption.

[0225] The specific DL signal may also be a PDCCH.

[0226] Default Spatial Relationship 3

[0227] In the case where a specific UL signal corresponds to a PDCCH (a case where a specific UL signal is scheduled or triggered by the PDCCH (DL DCI) for scheduling PDSCH), the default spatial relationship of the specific UL signal may also be the TCI state of the PDCCH. The specific UL signal may also be an A-SRS triggered by the PDCCH, or a PUCCH that transports HARQ-ACK for the PDSCH scheduled by the PDCCH. For example, in the case where the specific UL signal is an A-SRS, the PDCCH corresponding to the specific UL signal may also be a PDCCH that triggers A-SRS. In addition, for example, in the case where the specific UL signal is a PUCCH that transports HARQ-ACK, the PDCCH corresponding to the specific UL signal may also be a PDCCH that schedules the PDSCH and indicates the timing of the HARQ-ACK of the PDSCH. In the case where the specific UL signal does not correspond to the PDCCH, the default spatial relationship may also be the aforementioned default spatial relationship 1.

[0228] The specific DL signal may also be PDCCH or PDSCH.

[0229] Default Spatial Relationship 4

[0230] The default spatial relationship may also be the QCL assumption of CORESET#0 (the CORESET with an ID of 0).

[0231] The specific DL signal may also be CORESET#0.

[0232] Default Spatial Relationships 5

[0233] The default spatial relation may also be the path loss reference RS.

[0234] The default spatial relationship may also be the RS (RS resource) used for path loss estimation. The RS used for path loss estimation may also be an RS resource obtained by the SS / PBCH block used by the UE to obtain the MIB. For example, if the path loss reference RS information (pathlossReferenceRSs) for a specific UL signal is not given, or if the UE does not give a separate high-level parameter, the RS used for path loss estimation may also be an RS resource obtained by the SS / PBCH block used by the UE to obtain the MIB. The RS used for path loss estimation may also be a path loss reference RS with index 0 in the path loss reference RS information (list of path loss reference RSs). For example, if the UE does not provide path loss reference RS information (pathlossReferenceRSs in PUCCH power control information (PUCCH-PowerControl)) or if PUCCH spatial relationship information (PUCCH-SpatialRelationInfo) is not provided, the RS used for path loss estimation may also be a reference signal (referencesignal) in the PUCCH path loss reference RS with the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) having an index of 0 in the PUCCH path loss reference RS information (PUCCH-PathlossReferenceRS).

[0235] In the case where the path loss reference RS for a specific UL signal is not set through higher layer signaling, the UE may also use the RS for path loss estimation for the default spatial relationship of the specific UL signal.

[0236] In the case where the path loss reference RS for a specific UL signal is set through higher layer signaling, the UE may also use the set path loss reference RS for the default spatial relationship of the specific UL signal.

[0237] The specific DL signal may also be a path loss reference RS.

[0238] According to the above embodiments, the UE can appropriately determine the spatial relationship.

[0239] (Wireless Communication System)

[0240] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0241] Figure 31 is a diagram showing an example of a schematic structure of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), or the like.

[0242] In addition, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (Radio Access Technology) (RAT) (Multi-RAT Dual Connectivity (MR-DC)). 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.

[0243] 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.

[0244] 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)).

[0245] 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.

[0246] 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).

[0247] 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 (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 correspond to a frequency band higher than FR2.

[0248] Furthermore, the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0249] Multiple base stations 10 may also be connected via wired (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.

[0250] 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.

[0251] The user terminal 20 may also be a user terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0252] 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.

[0253] 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.

[0254] In the wireless communication system 1, as downlink channels, 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)) and the like may be used.

[0255] In addition, in the wireless communication system 1, 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 may be used.

[0256] 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).

[0257] 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.

[0258] In addition, the DCI for scheduling PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, PDSCH may also be replaced by DL data, and PUSCH may also be replaced by UL data.

[0259] 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. One 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.

[0260] 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.

[0261] The PUCCH may also be used to transmit at least one uplink control information (uplink control information (UCI)) including channel state information (CSI), delivery confirmation information (e.g., may also be called hybrid automatic repeat request (HARQ-ACK)), ACK / NACK, etc.), and scheduling request (SR). The random access preamble used to establish a connection with a cell may also be transmitted through the PRACH.

[0262] In the present disclosure, downlink, uplink, etc. may be expressed without "link". In addition, various channels may be expressed without "Physical" at the beginning.

[0263] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. may also be transmitted. In the wireless communication system 1, as DL-RS, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. may also be transmitted.

[0264] 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 an SS / PBCH block, SS block (SS Block (SSB)), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0265] 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).

[0266] (Base Station)

[0267] Figure 4 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.

[0268] In addition, in this example, the functional blocks of the characteristic parts of this embodiment are mainly shown, and the base station 10 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured by a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] The transmitting and receiving unit 120 (RF unit 122 ) may 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 .

[0279] 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 .

[0280] 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 to the obtained baseband signal to obtain user data, etc.

[0281] 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.

[0282] 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.

[0283] 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 .

[0284] (User Terminal)

[0285] Figure 5 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 transmission / reception unit 220, and a transmission / reception antenna 230. In addition, the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided in one or more pieces.

[0286] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and the user terminal 20 may also be assumed to have other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmitting unit may also be configured by a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured by a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0291] 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.

[0292] The transmitting and receiving unit 220 may also transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also receive the above-mentioned uplink channel, uplink reference signal, etc.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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 .

[0298] 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 .

[0299] 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.

[0300] 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.

[0301] 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 .

[0302] In the case where a reference signal (RS) for path loss reference is not set for a specific uplink signal, the control unit 210 may also use a quasi co-location (QCL) parameter based on a specific downlink signal for the spatial relationship of the specific uplink signal. The transmitting and receiving unit 220 may also use the spatial relationship to transmit the specific uplink signal.

[0303] In the case where a path loss reference RS is set for the specific uplink signal, the control unit 210 may also use the path loss reference RS for the spatial relationship.

[0304] The QCL parameter may be a reference signal used for estimating the path loss of the specific uplink signal.

[0305] The QCL parameter may be a reference signal resource obtained from a synchronization signal block used to acquire a master information block, or a path loss reference RS of index 0 in path loss reference RS information for a physical downlink control channel (PUCCH).

[0306] The QCL parameter may also be one of the transmit control instruction (TCI) state of the control resource set having the lowest ID for the nearest time slot for the physical downlink shared channel, the activation TCI state of the control resource set, the TCI state of the physical downlink control channel that schedules the specific uplink signal, and the QCL assumption of the control resource set having an ID of 0.

[0307] (Hardware Structure)

[0308] 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.

[0309] 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.

[0310] 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 6 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0311] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. are interchangeable. The hardware structure of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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 enables 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 implemented for other functional blocks.

[0316] 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 read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), or 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.

[0317] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), etc.), a digital versatile disk, a Blu-ray (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.

[0318] 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 can 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. can also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) can also be installed by the transmitting unit 120a (220a) and the receiving unit 120b (220b) separately physically or logically.

[0319] 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).

[0320] 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.

[0321] 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), a field programmable gate array (FPGA), etc., and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be installed using at least one of these hardware.

[0322] (Variation Example)

[0323] 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.

[0324] 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).

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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, 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.

[0330] 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.

[0331] 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 also be shorter than the TTI.

[0332] In addition, when one time slot or one mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may 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 may also be controlled.

[0333] 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.

[0334] 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.

[0335] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may also 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.

[0336] 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.

[0337] 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.

[0338] In addition, a resource block may also be composed of one or more resource elements (RE). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

[0339] A Bandwidth Part (BWP) (also referred to as a partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, a common RB may also be identified by an index of the RB relative to a common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0340] 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.

[0341] At least one of the configured BWPs may be activated, and the UE may not assume that it transmits or receives a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0342] 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.

[0343] 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.

[0344] 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. The 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.

[0345] Information, signals, etc. described in the present 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.

[0346] Furthermore, information, signals, etc. can be output from a high layer (upper layer) to a low layer (lower layer) or from a low layer to a high layer. Information, signals, etc. can also be input and output via a plurality of network nodes.

[0347] 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.

[0348] 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.

[0349] 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)).

[0350] 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).

[0351] 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).

[0352] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, a set of instructions, code, code segment, program code, program, sub-program, software module, application, software application, software package, routine, sub-routine, object, executable file, execution thread, procedure, function, etc.

[0353] In addition, software, instructions, information, etc. may also be sent and received via a transmission medium. For example, when 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.

[0354] 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.

[0355] 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.

[0356] 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 cell, and pico cell.

[0357] 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.

[0358] In the present disclosure, the terms "Mobile Station (MS)", "user terminal", "user equipment (UE)", "user terminal" and the like are used interchangeably.

[0359] In some cases, the mobile station is also referred to as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access user terminal, a mobile user terminal, a wireless user terminal, a remote user terminal, a hand set, a user agent, a mobile client, a client, or some other appropriate terminology.

[0360] 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.

[0361] 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, expressions such as "uplink" and "downlink" may also be replaced by expressions corresponding to the communication between user terminals (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0362] 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.

[0363] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node according to the circumstances. Obviously, in a network including one or more network nodes having a base station, various actions performed for communication with a user terminal can be performed by the base station, one or more network nodes other than the base station (for example, Mobility Management Entity (MME)), Serving-Gateway (S-GW), etc., but not limited to these), or a combination thereof.

[0364] The various methods / implementations described in this disclosure may be used individually or in combination, and may be switched during execution. In addition, the processing procedures, sequences, flow charts, etc. of the various methods / implementations described in this disclosure may be swapped 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.

[0365] 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), SUPER3G, 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 based on these. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0366] 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”.

[0367] 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 a first and a second element 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.

[0368] The term "determining" used in this disclosure may include a variety of actions in some cases. For example, "determining" may also include judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. as situations in which "determining" is performed.

[0369] In addition, “judgment (decision)” can also regard receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. as situations in which “judgment (decision)” is made.

[0370] In addition, “judgment (decision)” can also regard resolving, selecting, choosing, establishing, comparing, etc. as situations in which “judgment (decision)” is performed. In other words, “judgment (decision)” can also regard some actions as situations in which “judgment (decision)” is performed.

[0371] In addition, "judge (decide)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0372] The terms "connected", "coupled", or all their variations used in this disclosure mean 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 of these. For example, "connection" may also be replaced by "access".

[0373] In the present disclosure, when two elements are connected, it can be considered that they are "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.

[0374] 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 as "different".

[0375] In the present disclosure, when the terms "include", "including", and their variations are used, these terms, like the term "comprising", have an inclusive meaning. Furthermore, the term "or" used in the present disclosure does not mean an exclusive OR.

[0376] 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.

[0377] 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 present 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.

[0378] This application is based on Japanese Patent Application No. 2019-188984 filed on October 15, 2019. The entire contents are incorporated herein.

Claims

1. A terminal having: A receiving unit, receiving information of a transmission setting indicator state (TCI state) for downlink reception; and a control unit that applies the spatial relationship based on the TCI state to the SRS when a reference signal for path loss estimation for the SRS is not set; In a case where one or more control resource sets are set in a component carrier of the SRS, the information of the TCI state for the downlink reception is information of the TCI state for one control resource set within the one or more control resource sets, and the spatial relationship is based on a quasi-co-located QCL assumption of a control resource set with a lowest ID within the one or more control resource sets, When no control resource set is set within the component carrier, the TCI state used for the downlink reception is information on the TCI state of the physical downlink shared channel within the component carrier, and the spatial relationship is based on the TCI state with the lowest ID among one or more activated TCI states that can be applied to the physical downlink shared channel.

2. The terminal according to claim 1, wherein: The spatial relationship is based on a reference signal of type D of the TCI state.

3. A wireless communication method, which is a wireless communication method of a terminal, comprising: The step of receiving information for sending a setting indicator state, i.e., a TCI state, for downlink reception; and When a reference signal for path loss estimation for a sounding reference signal (SRS) is not set, a step of applying a spatial relationship based on the TCI state to the SRS, In a case where one or more control resource sets are set in a component carrier of the SRS, the information of the TCI state for the downlink reception is information of the TCI state for one control resource set within one of the one or more control resource sets, and the spatial relationship is based on a quasi-co-located QCL assumption of a control resource set with a lowest ID within the one or more control resource sets, When no control resource set is set within the component carrier, the information of the TCI state for downlink reception is information of the TCI state for the physical downlink shared channel within the component carrier, and the spatial relationship is based on the TCI state with the lowest ID among one or more activated TCI states that can be applied to the physical downlink shared channel.

4. A base station, comprising: A sending unit, sending information of a transmission setting indicator state, i.e., a TCI state, for downlink reception; and a control unit that controls reception of the SRS based on the spatial relationship of the TCI state when a reference signal for path loss estimation of the sounding reference signal (SRS) is not set, In a case where one or more control resource sets are set in a component carrier of the SRS, the information of the TCI state for the downlink reception is information of the TCI state for one control resource set within the one or more control resource sets, and the spatial relationship is based on a quasi-co-located QCL assumption of a control resource set with a lowest ID within the one or more control resource sets, When no control resource set is set within the component carrier, the information of the TCI state for downlink reception is information of the TCI state for the physical downlink shared channel within the component carrier, and the spatial relationship is based on the TCI state with the lowest ID among one or more activated TCI states that can be applied to the physical downlink shared channel.

5. A system comprising a terminal and a base station, wherein: The terminal has: A receiving unit, receiving information of a transmission setting indicator state, i.e., a TCI state, for downlink reception; as well as a control unit that applies the spatial relationship based on the TCI state to the SRS when a reference signal for path loss estimation for the SRS is not set; In a case where one or more control resource sets are set in a component carrier of the SRS, the information of the TCI state for the downlink reception is information of the TCI state for one control resource set within the one or more control resource sets, and the spatial relationship is based on a quasi-co-located QCL assumption of a control resource set with a lowest ID within the one or more control resource sets, When no control resource set is configured in any component carrier, the information of the TCI state used for the downlink reception is information of the TCI state of a physical downlink shared channel in the component carrier, and the spatial relationship is based on the TCI state with the lowest ID among one or more activated TCI states applicable to the physical downlink shared channel, The base station sends information about the TCI status.

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