Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives information pertaining to a plurality of resources for measuring channel state information (CSI) for coherent joint transmission (CJT); and a control unit that performs the measurement based on the information that follows at least one restriction among the plurality of resources, a plurality of ports associated with the plurality of resources, a period of the plurality of resources, and a quasi co-located QCL of the plurality of ports. According to one embodiment of the present disclosure, it is possible to determine an appropriate CSI measurement resource for CJT.

Description

Technical Field

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

[0003] Successor systems of LTE (also known as, for example, 5th generation mobile communication system (5G), 5G+(plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel.15 and later, etc.) are also being studied.

[0004] Prior art literature

[0005] 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

[0006] Problems to be solved by the invention

[0007] In future wireless communication systems (e.g., NR), research is underway to report channel state information (CSI) based on the reception of reference signals. In addition, research is underway to perform DL transmissions to terminals (user terminals, user equipment (UE)) from multiple transmission / reception points (multiple Transmission / Reception Points (TRPs, Multi TRP (MTRP)) or multiple panels (multi-panel). In addition, research is underway to perform coherent joint transmission (CJT) using multiple TRP / multi-panel.

[0008] However, the CSI measurement resources used for CJT have not been fully studied. If such a method is not clearly defined, there is a concern that communication throughput, communication quality, etc. will deteriorate.

[0009] Therefore, one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station for determining appropriate CSI measurement resources for CJT.

[0010] Means for solving problems

[0011] A terminal involved in one embodiment of the present invention comprises: a receiving unit, which receives information related to multiple resources for measuring channel state information (CSI) for coherent joint transmission (CJT); and a control unit, which performs the measurement based on the information, and the information complies with at least one of the following restrictions: the multiple resources, the multiple ports associated with the multiple resources, the period of the multiple resources, and the quasi-co-location (QCL) of the multiple ports.

[0012] Effects of the Invention

[0013] According to one aspect of the present disclosure, it is possible to determine appropriate CSI measurement resources for CJT. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An example of a 16-level quantization table is shown.

[0015] Figure 2 An example of an 8-level quantization table is shown.

[0016] Figure 3A and Figure 3B An example of a Rel.16 type 2 port selection codebook is shown.

[0017] Figure 4A and Figure 4B An example of a Rel.17 type 2 port selection codebook is shown.

[0018] Figure 5 An example of a precoding matrix for multiple TRPs is shown.

[0019] Fig. 6A and Figure 6B An example of multiple TRPs between sites and multiple TRPs within a site is shown.

[0020] Fig. 7A and Figure 7B An example of a CMR setting method is shown.

[0021] Fig. 8A and Figure 8B An example of a QLC rule is shown.

[0022] Fig.9A and Fig. 9B An example of a QLC rule is shown.

[0023] Fig. 10A and Fig. 10B Another example of the QLC rule is shown.

[0024] Fig.11 This is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.

[0025] Fig.12 This is a diagram showing an example of the configuration of a base station according to an embodiment.

[0026] Fig.13 This is a diagram showing an example of a configuration of a user terminal according to an embodiment.

[0027] Fig.14 This is a diagram showing an example of the hardware configuration of a base station and a user terminal according to an embodiment.

[0028] Fig.15 This is a diagram showing an example of a vehicle according to an embodiment. DETAILED DESCRIPTION

[0029] (Multiple TRP)

[0030] In NR, one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi TRP (MTRP)) using one or more panels (multi-panels) for DL ​​transmission to the UE is being studied. In addition, the UE uses one or more panels for one or more TRPs for UL transmission.

[0031] In addition, multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0032] Multiple TRPs (for example, TRP#1, #2) can also be connected through an ideal / non-ideal backhaul and exchange information, data, etc. Different code words (CW) and different layers can also be sent from each TRP of the multiple TRPs. As a method of sending multiple TRPs, non-coherent joint transmission (NCJT) can also be used.

[0033] In NCJT, for example, TRP#1 performs modulation mapping and layer mapping on a first codeword, and uses a first precoding to send a first PDSCH for a first number of layers (e.g., 2 layers). In addition, TRP#2 performs modulation mapping and layer mapping on a second codeword, and uses a second precoding to send a second PDSCH for a second number of layers (e.g., 2 layers).

[0034] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may also be defined to partially or completely overlap with respect to at least one of the time domain and the frequency domain. That is, at least one of the time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP may also overlap.

[0035] It is also possible to assume that the first PDSCH and the second PDSCH are not in a quasi-co-location (QCL) relationship (not quasi-co-located). The reception of multiple PDSCHs may also be rewritten as simultaneous reception of PDSCHs of a certain QCL type (eg, QCL type D).

[0036] Multiple PDSCHs from multiple TRPs (multiple PDSCHs) can also be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single-master mode). One DCI can also be sent from one TRP of multiple TRPs. Multiple PDSCHs from multiple TRPs can also be scheduled separately using multiple DCIs (multiple DCIs (M-DCI), multiple PDCCHs (multiple PDCCHs)) (multiple-master mode). Multiple DCIs can also be sent separately from multiple TRPs. The UE can also envision sending separate (different, separate) CSI reports (CSI reports) related to each TRP for different TRPs. Such CSI feedback can also be referred to as separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" can also be rewritten with "independent".

[0037] In addition, CSI feedback that sends a CSI report related to both TRPs to one TRP can also be used. Such CSI feedback can also be called joint feedback, joint CSI feedback, etc.

[0038] For example, in the case of separate feedback, the UE uses a certain PUCCH (PUCCH1) to send a CSI report for TRP#1 for TRP#1, and uses another PUCCH (PUCCH2) to send a CSI report for TRP#2 for TRP#2. In the case of joint feedback, the UE sends a CSI report for TRP#1 and a CSI report for TRP#2 for TRP#1 or #2.

[0039] Based on such a multi-TRP scenario, it is possible to use channels with good quality for more flexible transmission control.

[0040] (CSI report or reporting)

[0041] In Rel.15NR, a terminal (also referred to as a user terminal, user equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or resources used for the RS), and sends (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI can also be sent to a base station using, for example, an uplink control channel (e.g., a physical uplink control channel (Physical Uplink Control Channel (PUCCH))) or an uplink shared channel (e.g., a physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))).

[0042] The RS used for generating CSI may be, for example, at least one of the Channel State Information Reference Signal (CSI-RS), the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, the Synchronization Signal (SS), and the DeModulation Reference Signal (DMRS).

[0043] The CSI-RS may also include at least one of a non-zero power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including the SS and the PBCH (and the corresponding DMRS), and may also be referred to as an SS block (SSB), etc. In addition, the SS may also include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0044] In addition, CSI may also include at least one parameter (CSI parameter) such as Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CSI-RSResource Indicator (CRI)), SS / PBCH Block Resource Indicator (SS / PBCH Block Indicator (SSBRI)), Layer Indicator (Layer Indicator (LI)), Rank Indicator (Rank Indicator (RI)), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal-to-Noise and Interference Ratio or Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), etc.

[0045] The UE may also receive information related to CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may also be, for example, "CSI-ReportConfig" of the information element (IE) of the Radio Resource Control (RRC). In addition, in the present disclosure, the RRC IE may also be rewritten with RRC parameters, high-layer parameters, etc.

[0046] The report setting information (eg, "reportQuantity" of RRC IE) includes, for example, at least one of the following.

[0047] Information related to the type of CSI report (report type information, e.g., “reportConfigType” of RRC IE);

[0048] Information related to one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, such as "reportQuantity" of RRC IE);

[0049] Information on RS resources used in generating the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRCIE);

[0050] Information related to the frequency domain to be reported by the CSI (frequency domain information, for example, "reportFreqConfiguration" of the RRC IE).

[0051] For example, the report type information may also indicate periodic CSI (Periodic CSI (P-CSI)) reporting, aperiodic CSI (Aperiodic CSI (A-CSI)) reporting, and semi-persistent CSI (Semi-Persistent CSI (SP-CSI)) reporting.

[0052] In addition, the reporting amount information may also specify a combination of at least one of the above-mentioned CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0053] In addition, the resource information may be an ID of a resource for RS. The resource for RS may include, for example, a non-zero-power CSI-RS resource or SSB, and a CSI-IM resource (for example, a zero-power CSI-RS resource).

[0054] In addition, the frequency domain information can also represent the frequency granularity of the CSI report. The frequency granularity can also include, for example, wide band and sub band. Wideband is the entire CSI reporting band (entire CSI reporting band). Wideband can be, for example, the entirety of a certain (certain) carrier (component carrier (CC), cell, serving cell), or the entirety of the bandwidth part (Bandwidth part (BWP)) within a certain carrier. Wideband can also be rewritten as CSI reporting band, entire CSI reporting band, etc.

[0055] In addition, a subband is a part of a wideband and is composed of one or more resource blocks (Resource Block (RB) or Physical Resource Block (PRB)). The size of a subband may also be determined according to the size of a BWP (the number of PRBs).

[0056] The frequency domain information may also indicate which wideband or subband PMI is reported (the frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE used to determine whether to report wideband PMI or subband PMI). The UE may also determine the frequency granularity of the CSI report (i.e., either wideband PMI report or subband PMI report) based on at least one of the above-mentioned reporting amount information and the frequency domain information.

[0057] In the case where wideband PMI reporting is configured (determined), one wideband PMI may also be reported for the entire CSI reporting band. In the case where subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., a subband indication for each subband) for each of more than one subbands within the entire CSI report may be reported.

[0058] The UE performs channel estimation using the received RS and estimates a channel matrix H. The UE feeds back an index (PMI) determined based on the estimated channel matrix.

[0059] The PMI may also represent a precoding matrix (also referred to as a precoder) that the UE considers suitable for downlink (downlink (DL)) transmission to the UE. Each value of the PMI may also correspond to a precoding matrix. A set of PMI values ​​may also correspond to a set of different precoding matrices referred to as a precoder codebook (also referred to as a codebook).

[0060] In the spatial domain, the CSI report may also include more than one type of CSI. For example, the CSI may also include at least one of a first type (type 1 CSI) used for single beam selection and a second type (type 2 CSI) used for multi-beam selection. A single beam may also be rewritten as a single layer, and multi-beams may also be rewritten as multiple beams. In addition, type 1 CSI may not assume multi-user multiple input multiple output (MIMO), and type 2 CSI may also assume multi-user MIMO.

[0061] The above codebook may also include a codebook for type 1 CSI (also referred to as type 1 codebook, etc.) and a codebook for type 2 CSI (also referred to as type 2 codebook, etc.). In addition, type 1 CSI may also include type 1 single-panel CSI and type 1 multi-panel CSI, and different codebooks (type 1 single-panel codebook, type 1 multi-panel codebook) may be specified.

[0062] In the present disclosure, type 1 and type I may be replaced by each other. In the present disclosure, type 2 and type II may be replaced by each other.

[0063] The uplink control information (UCI) type may also include at least one of a hybrid automatic repeat request acknowledgment (HARQ-ACK), a scheduling request (SR), and CSI. UCI may be carried (delivered) by the PUCCH or by the PUSCH.

[0064] In Rel.15NR, UCI can include a CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0065] In Rel.15NR, UCI can contain two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and several subband PMI information. CSI part 1 and CSI part 2 are coded separately.

[0066] In Rel.15NR, the UE is configured with N (N≥1) CSI report settings and M (M≥1) CSI resource settings through the high layer. For example, the CSI report setting (CSI-ReportConfig) includes resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), report quantity (reportQuantity), etc. Each of the resource settings for channel measurement, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference is associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource setting includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0067] Taking both FR1 and FR2 as the objects, in order to make the premises (hypotheses) of more dynamic channels / interference for NCJT possible, the evaluation and regulation of CSI reports for at least one transmission of multiple TRPs and multiple panels in DL are being studied.

[0068] (Codebook Setting)

[0069] The UE is configured with parameters related to the codebook (codebook configuration (CodebookConfig)) through higher layer signaling (RRC signaling). The codebook configuration is included in the CSI report configuration (CSI-ReportConfig) of the higher layer (RRC) parameters.

[0070] In the codebook setting, at least one codebook among type 1 single panel (typeI-SinglePanel), type 1 multi-panel (typeI-MultiPanel), type 2 (typeII), and type 2 port selection (typeII-PortSelection) is selected.

[0071] The codebook parameters include parameters related to codebook subset restriction (CBSR) (…Restriction). The CBSR setting is a bit that indicates which PMI reports are permitted (“1”) and which PMI reports are not permitted (“0”) for the precoder associated with the CBSR bit. One bit of the CBSR bitmap corresponds to one codebook index / antenna port.

[0072] (CSI report settings)

[0073] In addition to the codebook configuration (CodebookConfig), the CSI report configuration (CSI-ReportConfig) of Rel.16 also includes CSI-RS resources for channel measurement (resourcesForChannelMeasurement(CMR)), CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference(ZP-IMR), nzp-CSI-RS-ResourcesForInterference(NZP-IMR)), etc. The parameters of CSI-ReportConfig except codebookConfig-r16 are also included in the CSI report configuration of Rel.15.

[0074] In Rel.17, an extended CSI report configuration (CSI-ReportConfig) for CSI measurement / reporting of multiple TRPs using NCJT is being studied. In this CSI report configuration, two CMR groups corresponding to each of the two TRPs are configured. The CMRs in the CMR group can also be used for at least one measurement of multiple TRPs and a single TRP using NCJT. The N CMR pairs of NCJT are configured via RRC signaling. The UE can also be configured via RRC signaling to determine whether to use the CMRs of the CMR pair in single TRP measurements.

[0075] For CSI reports associated with NCJT measurements of multiple TRPs / panels that are configured through a single CSI report configuration, support for at least one of the following options 1, 2 is being studied.

[0076] <Option 1>

[0077] The UE is configured to report X (X=0, 1, 2) CSIs associated with single TRP measurement assumptions and one CSI associated with NCJT measurement. In the case of X=2, the two CSIs are associated with two different single TRP measurements using CMRs of different CMR groups.

[0078] <Option 2>

[0079] The UE may also be configured to report a CSI associated with the best measurement result for both NCJT and single TRP measurement assumptions.

[0080] As described above, in Rel. 15 / 16, CBSR is configured for each codebook configuration of each CSI report configuration. That is, CBSR is applied to all CMRs in the corresponding CSI report configuration.

[0081] However, in the CSI report configuration for multiple TRPs based on Rel.17 of the CSI report configuration, when the above-mentioned options 1 and 2 are applied, the following measurement configuration may be performed.

[0082] Option 1 (X=0): Measurement of CSI of NCJT only.

[0083] Option 1 (X=1): Measurement of CSI of NCJT and CSI of a single TRP (one TRP).

[0084] Option 1 (X=2): Measurement of CSI of NCJT and CSI of a single TRP (two TRPs).

[0085] Option 2: Measurement of both NCJT’s CSI and single TRP’s CSI.

[0086] (Type 1 codebook)

[0087] For base station panels, type 1 single panel codebook and type 1 multi-panel codebook are specified. In type 1 single panel, for the number of CSI-RS antenna ports P CSI-RS With (N1, N2), the antenna model of the CSI antenna port array (logical setting) is defined. In the type 1 multi-panel, for the number of CSI-RS antenna ports P CSI-RS and (N g , N1, N2), the antenna model of the CSI antenna port array (logical setting) is specified.

[0088] For Rel.15 type 1 single panel CSI, the high-level parameter of the UE's codebook type (subType in type1 in codebookType in CodebookConfig) is set to type 1 single panel ('typeI-SinglePanel'). When the number of layers is not v∈{2, 3, 4}, the PMI value is related to the three codebook indices i 1，1 ,i 1，2 , i2 corresponds. In the case of layer number v∈{2,3,4}, the PMI value is related to the 4 codebook indexes i1，1 ,i 1，2 ,i 1，3 , i2 corresponds. When the number of layers is not v∈{2,3,4}, the composite codebook index i1=[i 1，1 ,i 1，2 In the case of the number of layers v∈{2, 3, 4}, the composite codebook index i1=[i 1，1 ,i 1，2 ,i 1，3 ].

[0089] For the number of CSI antenna ports P CSI-RS , the supported settings (combinations of values) of (N1, N2) and (O1, O2) are specified in the specification. (N1, N2) represents the number of antenna elements in two dimensions, and is set by n1-n2 in moreThanTwo in nrOfAntennaPorts in typeI-SinglePanel. (O1, O2) is the two-dimensional oversampling factor. The horizontal beam corresponds to i 1，1 is {0, 1, ..., N1O1-1}. The vertical beam corresponds to i 1，2 is {0, 1, ..., N2O2-1}. i2 is {0, 1, 2, 3}. For codebook mode (codebookMode) = 1, it is used to use antenna ports 3000 to 2999+P CSI-RS The matrix of the 1-layer CSI report codebook is W_i 1，1 ,i 1，2 , i2^(1). Here, W l，m，n (1) It is given by the following formula.

[0090] For Rel.15 type 1 multi-panel CSI, compared with type 1 single panel, in addition to N1 and N2, the number of panels N is set g As inter-panel phase alignment (inter-panel co-phasing, inter-panel phase correction, inter-panel phase compensation (phase compensation between panels), inter-panel phase adjustment / phase difference), it is additionally reported i, 1，4 The same SD beam is selected for each panel (precoding matrix W l ), only inter-panel phase integration is reported additionally.

[0091] For the number of CSI antenna ports P CSI-RS , supported (N gThe settings (combinations of values) of (N1, N2) and (O1, O2) are defined in the specification. (N1, N2) are set by ng-n1-n2 in typeI-MultiPanel. 1，1 is {0, 1, ..., N1O1-1}. 1，2 is {0, 1, ..., N2O2-1}. For q = 1, ..., N g -1,i 1，4，q is {0, 1, 2, 3}. i2 is {0, 1, 2, 3}. For codebook mode (codebookMode) = 1, it is used to use antenna ports 3000 to 2999+P CSI-RS The matrix of the 1-layer CSI report codebook is W_i 1，1 ,i 1，2 ,i 1，4 , i2^(1). Here, W l，m，p，n (1) =W l，m，p，n ^1,N g , 1.

[0092] For N g =W_l,m,p,n^1,N of {2,4} g ,1 and W_l,m,p,n^2,N g , 1(for the first layer, N g =2, codeBookMode = 1 l，m，p，n 1，2，1 , and for the second layer, N g =2, codeBookMode = 1 l，m，p，n 2，2，1 , and for the first layer, N g =4, codeBookMode = 1 l，m，p，n 1，4，1 , and for the second layer, N g =4, codeBookMode = 1 l，m，p，n 2，4，1 ) is given by the following formula.

[0093]

[0094] here, For N g =2, p=p1, for N g =4, p=[p1, p2, p3]. represents inter-panel co-phasing. For panels 0, 1, 2, and 3, the same beam (SD beam matrix, precoding matrix W l ) is selected, represents the phase correction of panel 1 with respect to panel 0, represents the phase correction of panel 2 with respect to panel 0, Represents the phase correction of panel 3 with respect to panel 0.

[0095] (Type 2 codebook)

[0096] Research is underway to obtain CSI for coherent joint transmission (CJT) for FR1 and up to 4 TRPs, assuming ideal backhaul, synchronization, the same number of antenna ports across multiple TRPs. Improvements to the type 2 codebook of Rel.16 / 17 are being studied for CJT multi-TRPs for FDD.

[0097] In the present disclosure, a matrix Z having X rows and Y columns is sometimes expressed as Z(X×Y).

[0098] For type 2 CSI of Rel.15, for a given layer k, the generation of the precoding vector per subband (SB-wise) is based on the following equation.

[0099] W k (N t × N3)=W1W 2，k (Y1)

[0100] N t is the number of ports. N3 is the total number (number of subbands) of precoding matrices (precoders) represented by PMI. t ×2L) is a matrix (SD beam matrix) consisting of L∈{2,4} (oversampled) spatial domain (spatialdomain (SD)) two-dimensional (2D) DFT vectors (SD beams, 2D-DFT vectors). L is the number of beams. For example, L=2 SD 2D-DFT vectors are b i , b j .W 2，k (2L×N3) is the sub-band complex linear combination (LC) coefficient matrix (combination coefficients) for layer k. 2，k represents beam selection and phase integration (co-phasing) between two polarizations. 2，k c i, c j For example, the channel matrix h is obtained by linear combination of L = 2 SD 2D-DFT vectors c i b i , +c j b j The feedback overhead is mainly due to the LC coefficient matrix W 2，k In addition, the type 2 CSI of Rel.15 only supports ranks 1 and 2.

[0101] Rel.16 Type 2 CSI is compressed in the frequency domain (FD) to reduce the 2，k The associated overhead. In addition to supporting ranks 1 and 2, the type 2 CSI of Rel.16 also supports ranks 3 and 4.

[0102] Regarding the type 2 CSI of Rel.16, for a given layer k, information based on the following formula may also be reported by the UE.

[0103] W k =W1W ～ k W f，k H (Y2)

[0104] W 2，k By W ～ k W f，k H is approximated. The matrix W ～ It can also be expressed by adding ~ (w wave) to W. Matrix W f，k H It is W f，k The adjoint matrix of .

[0105] For CSI reporting, the UE can also be configured with one of two subband sizes. The subband (CQI subband) can also be defined as N PRB SB The number of consecutive PRBs depends on the total number of PRBs in the BWP. The number of PMI subbands R per CQI subband can also be set by RRC IE (numberOfPMI-SubbandsPerCQI-Subband). R controls the total number of precoding matrices N3 represented by the PMI as a function of the number of subbands set in csi-ReportingBand, the subband size set by subbandSize, and the total number of PRBs in the BWP.

[0106] W1(N t(2L×M) is a matrix composed of multiple (oversampled) spatial domain (SD) 2D-DFT (vectors, beams). For this matrix, multiple indices of the 2D discrete Fourier transform (2D-DFT) vectors and the oversampling factor in two dimensions are reported. The response / distribution in the spatial domain represented by the SD 2D-DFT vectors can also be referred to as an SD beam.

[0107] W ～ k (2L×M v ) is a matrix composed of combination coefficients (sub-band complex linear combination (LC) coefficients). For this matrix, the maximum K0 non-zero coefficients (NZCs) are reported. This report consists of two parts: a bitmap that knows the positions of the NZCs and the quantization of the NZCs.

[0108] W f，k (N3×M v ) is a matrix composed of multiple frequency domain (FD) bases (vectors) for layer k. Each layer has M v FD bases (FD DFT bases). When N3>19, M v DFTs from an intermediate subset (InS) of size N3' (<N3) are selected. When N3≤19, log2(C(N3 - 1, M v - 1)) bits are reported. Here, C(N3 - 1, M v - 1) is the number of combinations of selecting M v - 1 from N3 - 1, which is also called binomial coefficients. The response / distribution in the frequency domain (frequency response) represented by the linear combination of FD basis vectors and combination coefficients can also be referred to as an FD beam. The FD beam can also correspond to a delay curve (time response).

[0109] A subset of the FD bases is given as {f1,..., f Mv}. Here, f i is the i-th FD basis for the k-th layer, i ∈ {1,..., M v}. The PMI sub-band size is given by the CQI sub-band size / R, where R ∈ {1, 2}. The number M v of FD bases for the given rank v is given by ceil(p v×N3 / R). The number of FD bases is the same for all layers k∈{1,2,3,4}. v Set by senior management.

[0110] Matrix W 2，k Each row of represents the channel frequency response of a specific SD beam. In the case of a SD beam with high directivity, the channel tap of each beam is limited (in the time domain, the power delay profile becomes discrete). As a result, the channel frequency response of each SD beam has a high correlation (close to flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD bases. For example, in M v = 2, use FD base f2, f q and linear combination coefficient d1 0 , d2 0 , the frequency response associated with SD beam b0 is through d1 0 f2+,d2 0 f q is approximated.

[0111] The highest gain is selected M v By setting M v <<N3,W ～ k The cost is compared with W 2，k The cost is quite small. v All or part of the FD basis is used for the approximation of the frequency response of each SD beam. The bitmap is used to report the FD basis selected only for each SD beam. If the bitmap is not reported, all FD basis are selected for each SD beam. In this case, the nonzero coefficients (NZC) of all FD basis are reported for each SD beam. The maximum number of NZCs in one layer is K. k NZ ≤K0=ceil(β×2LM v ), the maximum number of NZCs across all layers K NZ ≤2K0=ceil(β×2LM v ). β is set by the higher level.

[0112] W ～ k The reported complex coefficients within are the quantized amplitude and phase, respectively.

[0113] [Amplitude Quantization]

[0114] The polarization-specific reference amplitude is obtained using Figure 1 Table (amplitude coefficient indicator i 2，3，lMapping of multiple elements: From element k l，p (1) Mapped to the amplitude coefficient p l，p (1) ) is quantized to 16 levels. All other coefficients are quantized using Figure 2 Table (amplitude coefficient indicator i 2，4，l Mapping of multiple elements: From element k l，i，f (2) Mapped to the amplitude coefficient p l，i，f (2) ) with 8 levels of quantization.

[0115] [Phase Quantization]

[0116] All coefficients are quantized using 16-PSK. For example, Here, c l，i is the phase value associated with Phase coefficient reported by the UE (using 4 bits).

[0117] Type 2 CSI feedback on PUSCH in Rel.16 consists of two parts. CSI Part 1 has a fixed payload size and is used to identify the number of information bits in CSI Part 2. Part 2 is of variable size (UCI size depends on the number of non-zero amplitude coefficients (NZCs), which is unknown to the base station). The UE reports the number of NZCs in CSI Part 1, which determines the size of CSI Part 2. After receiving CSI Part 1, the base station identifies the size of CSI Part 2.

[0118] In enhanced type 2 CSI feedback, CSI part 1 contains RI, CQI, an indication of the total number of non-zero amplitudes across multiple layers for extended type 2 CSI. The fields of part 1 are coded separately. CSI part 2 contains the PMI for extended type 2 CSI. Parts 1 and 2 are coded separately. CSI part 2 (PMI) contains the oversampling factor, the index of the 2D-DFT basis, the index of the initial DFT basis (starting offset) of the selected DFT window, and the PMI of the selected DFT window. initial , a DFT basis selected for each layer, non-zero LC coefficients (NZC, amplitude and phase) of each layer, the strongest (strongest, maximum intensity) coefficient indicator (strongest coefficient int indicator (SCI)) of each layer, and at least one of the amplitude of the strongest coefficient for each layer / polarization.

[0119] Multiple PMI indices (PMI values, codebook indices) associated with different CSI part 2 information for the kth layer may also follow as follows.

[0120] ·i 1，1: oversampling factor;

[0121] ·i 1，2 : Multiple indices of 2D-DFT basis;

[0122] ·i 1，5 : Index of the initial DFT basis (starting offset) of the selected DFT window M initial ;

[0123] ·i 1，6，k : The DFT basis selected for the k-th layer;

[0124] ·i 1，7，k : Bitmap for layer k;

[0125] ·i 1，8，k : The strongest coefficient indicator (SCI) for the kth layer;

[0126] ·i 2，3，k : The amplitude of the strongest coefficient (for both polarizations) of the kth layer;

[0127] ·i 2，4，k : The amplitude of the reported coefficients of the kth layer;

[0128] ·i 2，5，k : The phase of the reported coefficients at the kth layer.

[0129] i 1，5 and i 1，6，k PMI index for DFT basis reporting. Only when N3>19, i 1，5 Be reported.

[0130] As a grouping of CSI Part 2, for a given CSI report, the PMI information is grouped into 3 groups (Groups 0 to 2). This is important for the case of CSI omission. Index i 2，4，l 、i 2，5，l 、i 1，7，l Each element reported is associated with a specific precedence rule. Groups 0 to 2 follow the following.

[0131] Group 0: index i 1，1 、i 1，2 、i 1，8，l (l=1, ..., v);

[0132] Group 1: Index i (of the reported case) 1，5 , index i (of the reported situation) 1，6，l 、i 1，7，l The highest v2LM in v -floor(KNZ / 2) priority elements, i 2，3，l 、i 2，4，l The highest ceil (K NZ / 2)-v priority elements, i 2，5，l The highest ceil (K NZ / 2)-v priority elements (l=1,...,v);

[0133] ·Group 2: i 1，7，l The lowest (lower) floor (K NZ / 2) priority elements, i 2，4，l The lowest (lower) floor (K NZ / 2) priority elements, i 2，5，l The lowest (lower) floor (K NZ / 2) priority elements (l=1,...,v);

[0134] In type 1 CSI, the SD beam represented by the SD DFT vector is transmitted toward the UE. In type 2 CSI, L SD beams are linearly combined and transmitted toward the UE. Each SD beam can be associated with multiple FD beams. For the corresponding SD beam, the channel frequency response can be obtained by the linear combination of these FD basis vectors. The channel frequency response corresponds to the power delay curve.

[0135] (Type 2 port selection codebook)

[0136] In Rel.16 type 2 port selection (PS) CSI, the type 2 PS codebook (CB) does not require the UE to derive the SD beam considering the 2D-DFT in the usual type 2 CB. Instead, the base station sends CSI-RS using K CSI-RS ports that are beamformed considering the set of SD beams. The UE identifies the best L (≤ K) CSI-RS ports and reports these indices in W1.

[0137] For layer k∈{1, 2, 3, 4}, the subband (SB)-wise precoder generation is given by the following equation.

[0138] W k (N t ×N3)=QW1W ～ k W f，k H (Y3)

[0139] Here, Q(N t×K) represents K SD beams used in CSI-RS beamforming. W1(K×2L) is a block diagonal matrix. ～ k (2L×M) is the LC coefficient matrix. W f，k (N3×M) is composed of N3 DFT basis vectors (FD basis vectors). K is set by a higher layer. L is set by a higher layer. P CSI-RS ∈{4, 8, 12, 16, 24, 32}. CSI-RS >4, L∈{2, 3, 4}.

[0140] In the CSI / codebook of type 2 port selection in Rel.15 / 16, each CSI-RS port #i is associated with the SD beam (b i ) to associate ( Figure 3A and Figure 3B ).

[0141] (Rel.17 Type 2 Port Selection Codebook)

[0142] In the CSI / codebook of type 2 port selection (extended type 2 port selection codebook) of Rel. 17, each CSI-RS port #i is paired with an SD-FD beam pair (SD beam b i and FD beam f i，j (j is the frequency index)) to associate ( Figure 4A and 4B ). In this example, ports 3 and 4 are associated to the same SD beam and to different FD beams.

[0143] The frequency selectivity of the channel frequency response observed in the UE based on the SD beam-FD beam pair can also be reduced by delay pre-compensation compared to the frequency selectivity of the channel frequency response observed in the UE based on the SD beam.

[0144] The main scenario for the type 2 port selection codebook of Rel.17 is FDD. The channel reciprocity based on SRS measurement is incomplete, but the base station can get some partial information. In addition to the CSI report, the SRS measurement in the base station is also used, so that the base station can get the CSI for deciding the DL MIMO precoder. In this case, in order to reduce the CSI overhead, several CSI reports can also be omitted.

[0145] In the type 2 PS CSI of Rel. 17, each CSI-RS port is beamformed using an SD beam and an FD basis vector. Each port is associated with an SD-FD pair.

[0146] For the given layer k, information based on the following formula is reported by the UE.

[0147] W k (K×N3)=W1W ～ k W f，k H (Y4)

[0148] For W1(K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station sends K beamformed CSI-RS ports. Each port is associated with an SD-FD pair. The UE selects L ports out of K and uses them as the PMI (W 1，k ) as a part of the SD beam. In Rel.16, each port is associated with an SD beam.

[0149] W ～ k (2L×M v ) is a matrix of combined coefficients (subband complex LC coefficients). A maximum of K0 NZCs are reported. The report consists of two parts: a bitmap that holds the NZC positions and a quantized NZC. The bitmap can be omitted in certain cases. In Rel.16, the bitmap of the NZC positions is always reported.

[0150] W f，k (N3×M v ) is a matrix consisting of N3 FD basis (FD DFT basis) vectors. There are M v The base station can also eliminate W f，k In W f，k When it is turned on (ON), M v An additional FD basis is reported. f，k When OFF, the additional FD base is not reported. f，k Always reported.

[0151] (CJT)

[0152] Joint transmission (JT) means simultaneous data transmission from multiple points (e.g., TRP) to a single UE.

[0153] Rel.17 supports NCJT from two TRPs. PDSCHs from two TRPs can also be precoded and decoded independently. Frequency resources can be non-overlapping, partially overlapping, or fully overlapping. In the event of overlap, the PDSCH from one TRP interferes with the PDSCH from other TRPs.

[0154] In Rel.18, support for CJT using up to 4 TRPs is being studied. Data from the 4 TRPs can also be coherently precoded and sent to the UE on the same time-frequency resources. For example, considering channels from 4 TRPs, the same precoding matrix can also be used. Coherence can also mean that there is a certain relationship between the phases of multiple received signals. Using 4TRP joint precoding, signal quality is improved and there can be no interference between the 4 TRPs. The data can also be subject to interference only outside the 4 TRPs.

[0155] In an ideal case (where 4 TRPs are co-located (considered as the same location)), a joint estimation of the aggregated channel matrix H can be performed and the joint precoding matrix V can be fed back. However, the large-scale path losses of the 4 paths can sometimes be quite different. The joint precoding matrix V based on a constant module codebook is incorrect. In this case, the feedback of each TRP and the inter-TRP coefficients can be more integrated than the current NR type-2 codebook.

[0156] For CJT of up to 4 TRPs in FR1, the selection of the 4 TRPs can also be semi-static. Therefore, the selection and the setting of 4 CMRs (4 CSI-RS resources) for channel measurement can also be semi-static. Dynamic indication of 4 TRPs from the list of CSI-RS resources is also possible, but less likely.

[0157] The path losses from the 4 TRPs to the UE are different. Therefore, it is difficult to report only one aggregated CSI representing the joint channel matrix.

[0158] A fallback operation to NCJT (ie, single TRP) is considered, and the CSI of each TRP (ie, single TRP CSI like NCJT CSI of Rel. 17) is also considered.

[0159] (Rel.17NCJT CSI)

[0160] For Rel.17NCJT CSI, two CMR groups with Ks=K1+K2 CMRs are set for the UE. K1 and K2 are the number of CMRs in the two CMR groups, respectively. N CMRs are set by the higher layers by selecting from all possible pairs. N=1, Ks=2 are supported. N max =2 is an optional function of UE. S，max = The support of X is an optional function of UE.

[0161] Support at least one of the following options 1 and 2.

[0162] [Option 1]

[0163] The UE may also be configured to report X CSIs associated with a single TRP measurement hypothesis and one CSI associated with an NCJT measurement hypothesis. X = 0, 1, 2. In the case of X = 2, the two CSIs are associated with two different single TRP measurement hypotheses with multiple CMRs from different multiple CMR groups. Support of X = 1, 2 is an optional feature of the UE for UEs supporting option 1.

[0164] [Option 2]

[0165] The UE may also be configured to report a CSI that is associated with the best one within the measurement premise of NCJT and a single TRP.

[0166] The following are being studied as CSI extensions for CJT.

[0167] CMR and IMR for measurement of up to 4 TRPs.

[0168] ·CSI of each TRP along with inter-TRP CSI feedback for x-TRP CJT.

[0169] Inter-TRP CSI: New feedback and codebook for inter-TRP phase matrix / inter-TRP amplitude matrix / inter-TRP matrix (including both amplitude and phase).

[0170] ·Can add reported x-TRP CJT CQI.

[0171] As a multi-TRP CJT CSI, the following are being studied.

[0172] ·Restrictions on the settings of CMR / CSI for each TRP.

[0173] ·CSI / PMI between TRPs (e.g., inter-TRP phase with / without inter-TRP amplitude).

[0174] [Option 1] In addition to the Rel.16 / 17 Type 2 codebook, there is also an independent codebook and feedback.

[0175] [Option 2] With W k ～ W f，k H / In W k ～ W f，k H W2 of CSI / PMI between TRPs transmitted internally. Common / different FD substrates for multiple TRPs.

[0176] As a multi-panel type 2CSI for multi-TRP CJT, the following is being studied.

[0177] · Multi-panel extension of Type 2 codebook and Type 2 PS codebook of Rel.16 / 17.

[0178] • New antenna settings for type 2 multi-panel codebook.

[0179] (CJT CSI)

[0180] W1(SD base) / W for each TRP f (FD base) can be the same or different. k (NZC) can also be different. W1 / W for each TRP f / W k They can be selected together or separately. f / W k Design, preferably for different scenarios with different options. It can be reported as separate content or in W k The policies used depend on the deployment scenario (e.g., intra-site multiple TRPs or inter-site multiple TRPs).

[0181] For example, Figure 5 As shown, the precoding matrix for 4-TRP CJT CSI (codebook) can also be obtained by W1 / W for each TRP. f / W k W1 for each TRP can be the same or different, and can be selected together or separately. k They can also be different and can be selected together or separately. fThey may be the same or different, and may be selected together or separately.

[0182] (QCL)

[0183] For DM-RS for PDSCH, the UE assumes a TCI state other than an indicated DL or joint TCI state (indicated DLorJointTCIStates) indicating one of the following one or more QCL types, or a DL or joint TCI state.

[0184] "Type A" with CSI-RS resources and, if available, "Type D" with the same CSI-RS resources within the NZP CSI-RS resource set (NZP-CSI-RS-ResourceSet) configured with tracking RS information (higher layer parameter trs-Info).

[0185] "Type A" of the accompanying CSI-RS resources, which are within the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, and, if applicable, "Type D" of the accompanying CSI-RS resources, which are within the NZP-CSI-RS-ResourceSet configured with the repetition (high layer parameter repetition).

[0186] "Type A" with CSI-RS resources and, if available, "Type D" with the same CSI-RS resources in NZP-CSI-RS-ResourceSet configured without higher layer parameter trs-Info and without higher layer parameter repetition.

[0187] For the CSI-RS resources in NZP-CSI-RS-ResourceSet that are configured without the higher layer parameter trs-Info and without the higher layer parameter repetition, the UE assumes that the TCI state represents one of the following one or more QCL types.

[0188] "Type A" with CSI-RS resources and, if available, "Type D" with the same CSI-RS resources within the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info.

[0189] "Type A" with CSI-RS resources and, if applicable, "Type D" with SS / PBCH blocks, which are in the NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info.

[0190] "Type A" of the accompanying CSI-RS resources, which are in the NZP-CSI-RS-ResourceSet configured with the accompanying higher layer parameter trs-Info, and, if applicable, "Type D" of the accompanying CSI-RS resources, which are in the NZP-CSI-RS-ResourceSet configured with the accompanying higher layer parameter repetition.

[0191] When "Type D" cannot be used, "Type B" is used with CSI-RS resources, and the CSI-RS resources are in NZP-CSI-RS-ResourceSet configured with the higher layer parameter trs-Info.

[0192] (Study #1)

[0193] Two options are being studied for the case where multiple CMRs for x-TRP are set in CSI-ReportConfig.

[0194] [Option 1]

[0195] A maximum of X resources (CMR / CMR group / CSI-RS resource / CSI-RS resource set) can be set. Each resource corresponds to a TRP. This is useful in scenarios with multiple TRPs between sites ( Fig. 6A ) is preferred.

[0196] [Option 2]

[0197] For CJT CSI measurement, more than one N-port CSI-RS resource can be configured. More than one port corresponds to one TRP. This is useful in multiple panels / TRP scenarios within a site ( Figure 6B ) is preferred.

[0198] As an improvement of the type 2 codebook for CJT multi-TRP, the following NZP CSI-RS (CMR) setting within the resource setting associated with the type 2 codebook for CJT is being studied.

[0199] NZP CSI-RS resources. Maximum number of ports = 32.

[0200] K>1 NZP CSI-RS resources with the same number of ports (representing K TRPs).

[0201] (Study #2)

[0202] Research is underway to support additional indications for multiple TRPs / CMRs co-located within a site / CMR group in the CMR setting. For example, in the case where X CMRs (e.g., X CSI-RS resources) are set in the CSI-ReportConfig, and each CMR corresponds to one TRP (X TRPs between sites, e.g., within 4 TRPs), the additional indication may also indicate that the first 2 CMRs are co-located with the TRP within the site, and the last 2 CMRs are co-located with the TRP within the site.

[0203] In the case of an additional indication of a CMR group configured for multiple TRPs within a site / between sites, the UE may also indicate the W1 / W2 for CMRs from multiple TRPs within a site. f / W k Measurement / reporting of W1 / W for CMRs from multiple TRPs across sites f / W k Different operations are applied to the measurement / reporting.

[0204] exist Fig. 7A In the example, CMR1 to 4 are associated with TRP1 to 4 respectively (CMR1 to 4 are sent through TRP1 to 4). (When the UE assumes multiple CMRs between sites by default) When TRP1 and TRP2 are co-located, CMR1 and CMR2 can also be indicated as a CMR group.

[0205] exist Figure 7B In the example, CMR1 to 4 are associated with TRP1 to 4 respectively (CMR1 to 4 are sent through TRP1 to 4). (When the UE assumes multiple CMRs between sites by default) when TRP1 and TRP2 are co-located and TRP3 and TRP4 are co-located, CMR1 and CMR2 can also be indicated as a CMR group, and CMR3 and CMR4 can also be indicated as a CMR group.

[0206] (analyze)

[0207] The details and constraints related to the CMR settings in the CSI-ReportConfig of the CJT CSI for up to 4 TRPs may also comply with one or more of the following CMR setting methods.

[0208] [CMR setting method 1]

[0209] K>1 NZP CSI-RS resources with the same number of ports (representing K TRPs). Fig. 8AIn the example, CSI-RS#1 is transmitted from TRP1 using CMR1, and CSI-RS#2 is transmitted from TRP2 using CMR2. For this CMR setting method, the selection of resource numbers, the selection of port numbers, and the temporal relationship of these CSI-RS resources become problems (problem #1).

[0210] [CMR setting method 2]

[0211] NZP CSI-RS resources. Maximum number of ports = 32. Figure 8B In the example, CSI-RS#1 is sent from TRP1 using CMR1, and CSI-RS#1 is sent from TRP2 using CMR2. That is, TRP1 and 2 jointly send CSI-RS#1. In this CMR setting method, in the case of CJT using 4 TRPs, 4 TCI states should be indicated, and each TCI state can be set with a QCL resource RS (for example, a CSI-RS resource for CSI). However, one NZP CSI-RS resource for CSI is actually sent from multiple TRPs. At this time, how to associate the TCI state with the TRP (for example, the port of the one NZP CSI-RS resource) becomes a problem (problem #2).

[0212] [CMR setting method 3]

[0213] In addition to indicating CMR setting method 1, additional CMR grouping is also indicated. For multiple CMRs within a CMR group and multiple CMRs across multiple CMR groups, W1 / W f / W k The measurement / reporting is different. This CMR setting method has the same problem as CMR setting method 1 (problem #3).

[0214] Thus, the setting / instruction / restriction / rule of resources for CJT CSI has not been sufficiently studied. If the CMR is not sufficiently studied, there is a concern that the communication throughput / communication quality may be reduced.

[0215] Therefore, the inventors of the present invention have conceived of settings / instructions / constraints / rules for resources for CJT CSI.

[0216] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, each of the following embodiments (for example, each case) may be applied alone or in combination of at least two.

[0217] In the present disclosure, "A / B" and "at least one of A and B" may be replaced with each other. In addition, in the present disclosure, "A / B / C" may also mean "at least one of A, B, and C".

[0218] In the present disclosure, activate, deactivate, indicate (or specify), select, configure, update, determine, etc. may also be mutually rewritten. In the present disclosure, support, control, controllable, operate, and operate may also be mutually rewritten.

[0219] In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, high-layer parameters, information elements (IE), settings, etc. can also be overwritten with each other. In the present disclosure, Medium Access Control (MAC Control Element (CE)), update commands, activation / deactivation commands can also be overwritten with each other.

[0220] In the present disclosure, the high-layer signaling may be, for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information, or any one of them or a combination thereof.

[0221] In the present disclosure, MAC signaling may also use, for example, MAC control elements (MAC CE (Control Element)), MAC PDU (Protocol Data Unit), etc. Broadcast information may also be, for example, Master Information Block (MIB), System Information Block (SIB), minimum system information (Remaining Minimum System Information (RMSI)), Other System Information (Other System Information (OSI)), etc.

[0222] In the present disclosure, the physical layer signaling may be, for example, downlink control information (Downlink Control Information (DCI)), uplink control information (Uplink Control Information (UCI)), etc.

[0223] In the present disclosure, index, identifier (ID), indicator, resource ID, etc. may also be overwritten with each other. In the present disclosure, sequence, list, set, group, group, cluster, subset, etc. may also be overwritten with each other.

[0224] In the present disclosure, panel, panel group, beam, beam group, precoder, uplink (UL) transmission entity, transmission / reception point (TRP)), base station, spatial relationship information (Spatial Relation Information (SRI)), spatial relationship, SRS resource indicator (SRS Resource Indicator (SRI)), control resource set (COntrol REsource SET (CORESET)), physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), codeword (Codeword (CW)), transport block (Transport Block (TB)), reference signal (Reference Signal (RS)), antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relationship group, code division multiplexing (Code Division Multiplexing (CDM)) group), reference signal group, CORESET group, physical uplink control channel (Physical Uplink Control Channel (PUCCH)) group, PUCCH resource group), resources (for example, reference signal resources, SRS resources), resource sets (for example, reference signal resource sets), CORESET pool, downlink transmission configuration indication state (Transmission Configuration Indication state (TCI state)) (DLTCI state), uplink TCI state (ULTCI state), unified TCI state (unified TCI state), common TCI state (common TCI state), Quasi-Co-Location (Quasi-Co-Location (QCL)), QCL settings, etc. can also be rewritten with each other.

[0225] In the present disclosure, time domain resource allocation and time domain resource assignment may also be overwritten with each other.

[0226] In the present disclosure, beam, SD beam, SD vector, and SD 2D-DFT vector may be replaced with each other. L, the number of SD beams, the number of beams, and the number of SD 2D-DFT vectors may be replaced with each other.

[0227] In the present disclosure, FD base, FD DFT base, DFT base, f i In the present disclosure, FD beam, FD vector, FD basis vector, FD DFT basis vector, and DFT basis vector may also be replaced with each other.

[0228] In the present disclosure, the combination coefficients, LC coefficients, sub-band complex LC coefficients, and combination coefficient matrices may also be rewritten mutually.

[0229] In the present disclosure, the panel, base station (gNB) panel, and TRP can also be rewritten mutually.

[0230] In the present disclosure, co-phasing, phase integration, phase correction, phase adjustment, phase difference, and phase relationship can also be rewritten.

[0231] In the present disclosure, layer k and layer l may also be replaced with each other.

[0232] (Wireless Communication Method)

[0233] In each embodiment, at least one of the aforementioned type 2 CSI report of Rel.16, type 2 port selection CSI report of Rel.16, and type 2 port selection CSI report of Rel.17 may also be regarded as a single TRP CSI or a single panel CSI.

[0234] In each embodiment, X TRPs, X-TRPs, X panels, and Ng panels may be replaced with each other. In each embodiment, CJTs using X TRPs, CJTs using X panels, and X-TRP CJTs may be replaced with each other.

[0235] In various embodiments, the reference CSI, the CSI for the reference TRP, and the first reported CSI may also override each other. In various embodiments, the reference TRP, the CSI corresponding to the reference CSI, the TRP corresponding to the first reported CSI, and the CSI-RS resource / CMR / CMR group / CSI-RS resource set corresponding to the first reported CSI may also override each other. In various embodiments, the TRP, CSI-RS resource, CMR, CMR group, and CSI-RS resource set may also override each other.

[0236] In each embodiment, multiple TRPs, multiple panels, intra-site multiple TRPs, and inter-site multiple TRPs can also rewrite each other.

[0237] In each embodiment, inter-TRP, inter-panel, inter-TRP difference, and inter-TRP comparison can also be rewritten.

[0238] In various embodiments, the CSI between TRPs, the CJT CSI between TRPs, the CSI between panels, the CSI of other TRPs for the CSI of the reference TRP, and the CSI of other TRPs for the CSI of the reference panel may also be overwritten with each other. In various embodiments, the CSI of each TRP (per-TRP) and the CSI of each panel (per-panel) may also be overwritten with each other.

[0239] In various embodiments, the inter-TRP phase index and the inter-TRP phase phasing index may also be overwritten with each other. In various embodiments, the inter-TRP index and the inter-TRP coefficient index may also be overwritten with each other. In various embodiments, the inter-TRP phase matrix and the inter-TRP phase phasing matrix may also be overwritten with each other. In various embodiments, the inter-TRP matrix and the inter-TRP coefficient matrix may also be overwritten with each other. In various embodiments, the inter-TRP phase codebook and the inter-TRP phase phasing codebook may also be overwritten with each other. In various embodiments, the inter-TRP codebook and the inter-TRP coefficient codebook may also be overwritten with each other.

[0240] In each embodiment, the object resource, CMR, CSI-RS resource, NZP-CSI-RS resource, CMR group, CSI-RS resource set, NZP-CSI-RS resource set, and TRP may also be overwritten with each other.

[0241] In each embodiment, the TRP codebook, multiple panel codebooks for type 2 codebooks, and the panel codebooks can also rewrite each other.

[0242] In various embodiments, the FD basis vector size, the FD basis number, M v Size, M v 、M v，i They can also rewrite each other.

[0243] In each embodiment, multiple TRPs / multiple CMRs are co-located, and multiple TRPs within a site can also overwrite each other.

[0244] In various embodiments, the reporting / content of CSI may be applied to both subband reporting and wideband reporting.

[0245] The UE may also receive information related to multiple resources for measuring CSI of CJT (e.g., CSI-ReportConfig), and measure / report CSI based on the information. The information may also comply with at least one restriction of multiple resources, multiple ports associated with the multiple resources, the period of the multiple resources, and the QCL of the multiple ports.

[0246] <Implementation method #1>

[0247] For the NZP CSI-RS resources (and / or CSI-IM resources) of each CSI-ReportConfig / UE / BWP / CC used for CSI measurement / reporting, or for the CSI-RS resources (and / or CSI-IM resources) within multiple activated BWPs across all CCs, one or more of the following restrictions may also be defined.

[0248] The maximum number of ports per resource.

[0249] The maximum number of resources.

[0250] The maximum value of the total number of ports.

[0251] The maximum number of simultaneous NZP-CSI-RS resources.

[0252] • The maximum value of the total number of CSI-RS ports within a simultaneous NZP CSI-RS resource.

[0253] • The maximum number of NZP CSI-RS resources within a certain time window (eg, X slots).

[0254] • The maximum value of the total number of CSI-RS ports within a NZP CSI-RS resource within a certain time window (eg, X slots).

[0255] Here, the simultaneous NZP CSI-RS resource may also be a plurality of NZP CSI-RS resources that are activated at the same time. The number of activated NZP CSI-RS resources may also be counted as follows.

[0256] ·In any time slot, the UE may not be assumed to have more activated CSI-RS ports or activated CSI-RS resources within an activated BWP than the number (maximum number) reported as a capability. An NZP CSI-RS resource is active for the duration of a period defined as follows. This period in aperiodic CSI-RS starts at the end of the PDCCH containing the request and ends at the end of the PUSCH containing the report associated with the aperiodic CSI-RS. This period in semi-persistent CSI-RS starts at the end of application of the activation command and ends at the end of application of the deactivation command. This period in periodic CSI-RS starts when it is set by higher layer signaling and ends when the periodic CSI-RS setting is released. If a CSI-RS resource is referenced N times by more than one CSI report setting, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times.

[0257] For UEs supporting CJT, UE capability signaling may be introduced for each of the one or more aforementioned constraints.

[0258] Regarding problem #3, one or more of the aforementioned constraints may be considered for multiple CMRs indicated in each CMR group, or one or more of the aforementioned constraints may be considered for multiple CMRs indicated across multiple CMR groups in CSI-ReportConfig.

[0259] According to this embodiment, the UE can be appropriately set / instructed of the NZP CSI-RS resources / CSI-IM resources for measurement / reporting of CJT CSI.

[0260] <Implementation Method #2>

[0261] In the CMR setting for CSI measurement associated with CSI-ReportConfig for CJT, for K NZP CSI-RS resources (K TRPs for CJT measurement), one or more of the following restrictions may also be supported. The one or more restrictions may also be restrictions on the period of the K NZP CSI-RS resources.

[0262] [Limit 1]

[0263] The K NZP CSI-RS resources may also be limited to X consecutive time slots without switching DL / UL. The value of X may also be specified in the specification. UE capabilities related to the value of X may also be imported. For different values ​​of K, UE capabilities related to the value of X may also be imported.

[0264] [Restriction 2]

[0265] The K NZP CSI-RS resources are restricted to the same discontinuous reception (DRX) activation time. For example, for CJT CSI setting, the UE may also report the CSI report only when receiving in at least one CSI-RS transmission opportunity for each CSI-RS resource of the K NZP CSI-RS resources in the same DRX activation time before the CSI reference resource, and may also discard the CSI report when this is not the case.

[0266] Rel.17NCJT CSI has the following restrictions.

[0267] When DRX is set and a CSI-RS resource set for channel measurement corresponding to a CSI report is set with two resource groups and N resource pairs, the UE reports a CSI report only when receiving in at least one CSI-RS transmission opportunity for each CSI-RS resource in one resource pair within the same DRX activation time before the CSI reference resource, and discards the CSI report when this is not the case.

[0268] For question #3, for NZP CSI-RS resources within a CMR group within CSI-ReportConfig, one or more of the aforementioned restrictions may also be considered.

[0269] In the aforementioned CMR setting method 2, a new QCL rule for the DMRS or CSI-RS of the PDSCH / PDCCH may be introduced. The new QCL rule may be one or more of the following QCL rules.

[0270] [QCL Rule 1]

[0271] For the DMRS of PDSCH / PDCCH, the UE may also assume a TCI state indicating the following QCL type.

[0272] "Type A" for several ports (indicated ports) of a CSI-RS resource and, if available, "Type D" for the same port of the same CSI-RS resource in a NZP-CSI-RS-ResourceSet that is set without the higher-level parameter trs-Info and without the higher-level parameter repetition.

[0273] exist Fig.9AIn the example of QCL rule 1, the ports of the source RS are several ports (indicated ports) of any CSI-RS resource that is not accompanied by TRS information (related to type A / D) and repeated, and the ports of the target RS are the ports of the DMRS of PDSCH / PDCCH.

[0274] [QCL Rule 2]

[0275] It is also possible that the CSI-RS (for example, the QCL resource RS of the DMRS of the PDCCH / PDSCH) is related to at least one of "Type A", "Type B", and "Type D", and is associated with several ports (indicated ports) of the CSI-RS resources within the NZP-CSI-RS-ResourceSet that is set without the high-level parameter trs-Info and without the high-level parameter repetition.

[0276] exist Fig. 9B In the example of QCL rule 2, the ports of the source RS are several ports (indicated ports) of CSI-RS resources that are not accompanied by TRS information (related to type A / B / D) and any repeated CSI-RS resources, and the ports of the target RS are the ports of the CSI-RS.

[0277] Several ports (indicated ports) of CSI-RS resources in QCL rule 1 / QCL rule 2 may also be explicitly indicated. For example, for CSI-RS resources with 32 ports, ports #0-#7, ports #8-#15, ports #16-#23, and ports #24-#31 may also be associated with TRP #1, #2, #3, and #4, respectively.

[0278] For example, in QCL rule 1, the NW may also set ports #0-#7 of the CSI-RS as resource RSs within TCI state #1, ports #8-#15 of the CSI-RS as resource RSs within TCI state #2, ports #16-#23 of the CSI-RS as resource RSs within TCI state #3, and ports #24-#31 of the CSI-RS as resource RSs within TCI state #4. In this case, the NW needs to indicate 4 TCI states for 4-TRPs CJT. In the case where the NW decides to schedule 2-TRPs CJT, the NW can indicate 2 TCI states. For example, the NW may also indicate 2 TCI states in order to indicate that TCI states #1 and #2 mean CJTs from TRPs #1 and #2, and TCI states #1 and #4 mean CJTs from TRPs #1 and #4.

[0279] For example, in QCL rule 2, the NW may also set two groups of ports in TCI state #1 (a group of ports #0-#7 and a group of ports #8-#15), two groups of ports in TCI state #2 (a group of ports #0-#7 and a group of ports #16-#23), ..., three groups of ports in TCI state #7 (a group of ports #0-#7 and a group of ports #8-#15 and a group of ports #16-#23), and four groups of ports in TCI state #8 (a group of ports #0-#7 and a group of ports #8-#15 and a group of ports #16-#23 and a group of ports #24-#31). In this case, if the NW decides to schedule a 4-TRPs CJT, the NW can indicate TCI state #8. If the NW decides to schedule a 2-TRPs CJT of TRPs #1 and #2, the NW can indicate TCI state #1. In case NW decides the scheduling of 2-TRPs CJT from TRP#1 and #3, NW can indicate TCI state #2. In either indication, only one TCI state is required.

[0280] The TCI state in QCL rule 1 / QCL rule 2 may also indicate multiple groups of ports for CSI-RS resources of a certain QCL type (eg, a maximum of 2 groups, a maximum of 4 groups).

[0281] exist Fig. 10A In the example of a variation of QCL rule 1, the ports of the source RS are multiple groups of ports of CSI-RS resources that are not accompanied by TRS information (related to type A / D) and repeated CSI-RS resources (for example, group 1 of ports, group 2 of ports, group 3 of ports, and group 4 of ports), and the ports of the target RS are ports of DMRS of PDSCH / PDCCH.

[0282] exist Fig. 10B In the example of a variation of QCL rule 2, the ports of the source RS are multiple groups of ports of CSI-RS resources that are not accompanied by TRS information (related to type A / B / D) and repeated CSI-RS resources of any one of the groups (for example, the first group of ports (first set of ports), the second group of ports (second set of ports), the third group of ports (third set of ports), and the fourth group of ports (fourth set of ports)), and the ports of the target RS are the ports of the CSI-RS.

[0283] UE capabilities related to QCL rules 1 / 2 can also be imported.

[0284] In Rel.17 high speed train (HST), if the UE is configured with single frequency network (SFN) solution B, several parameters are discarded from indicating the TCI state as follows.

[0285] ·When the UE is configured with a PDCCH set to SFN scheme B (sfnSchemeB) using an SFN scheme (sfnSchemePdcch) and a CORESET with two TCI states is activated, the UE assumes that the DMRS port of the PDCCH is QCLed with the DL-RS of the two TCI states in addition to the QCL parameters {Doppler shift, Doppler spread} indicating the second TCI state.

[0286] ·When the UE is configured with a PDCCH SFN scheme (sfnSchemePdcch) set to SFN scheme B (sfnSchemeB), and the UE is indicated with two TCI states in the code point of the DCI field 'Transmission Configuration Indication (TCI)' in the DCI that schedules the PDSCH, the UE assumes that the DMRS port of the PDSCH is QCLed with the DL-RS of the two TCI states in addition to the QCL parameters {Doppler shift, Doppler spread} of the second indication of the TCI state.

[0287] In order to indicate which antenna port is not QCLed with the indicated TCI state in QCL rule 1 / 2, the same signaling as the structure of SFN scheme B may also be used. That is, the UE may also ignore a specific QCL parameter in a specific TCI state within multiple TCI states indicated for measuring CJT CSI. The specific TCI state may be either the first TCI state or the second TCI state within multiple TCIs. The specific QCL parameter may also include at least one of Doppler shift and Doppler spread.

[0288] For any of the DMRS and CSI-RS resources of PDSCH / PDCCH, a TCI state other than a specific QCL type (type A / B / D) of a NZP CSI-RS resource that is not accompanied by TRS information and repetition may be indicated.

[0289] According to this embodiment, the UE can be appropriately set / instructed to use NZP CSI-RS resources / CSI-IM resources for measuring / reporting CJT CSI.

[0290] <Supplement>

[0291] At least one of the above-mentioned embodiments may also be applied only to UEs that report a specific UE capability or support the specific UE capability.

[0292] The specific UE capability may also represent at least one of the following:

[0293] Supporting specific processing / operation / control / information for at least one of the above embodiments.

[0294] Supporting parameters set by the NW in at least one of the above-mentioned embodiments.

[0295] Supporting at least one of the above embodiments, reporting content / reporting rules.

[0296] Supporting at least one of the above-mentioned options / choices.

[0297] The maximum number of activated CSI-RS ports or activated CSI-RS resources within a slot.

[0298] Supports each of one or more constraints in implementation #1.

[0299] Capabilities related to the value of X in limitation 1 of embodiment #2. Capabilities related to the value of X for different values ​​of K.

[0300] • Capabilities related to QCL rule 1 / 2 of implementation #2.

[0301] In addition, the above-mentioned specific UE capabilities can be capabilities that are applied across all frequencies (regardless of frequency), capabilities for each frequency (for example, cell, band, BWP), capabilities for each frequency range (for example, Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), and capabilities for each subcarrier spacing (SubCarrier Spacing (SCS)).

[0302] In addition, the above-mentioned specific UE capabilities can be capabilities applied across full-duplex modes (common regardless of the duplex mode) or capabilities for each duplex mode (for example, time division duplex (TDD) and frequency division duplex (FDD)).

[0303] In addition, at least one of the above-mentioned embodiments may also be applied when the UE is configured with specific information associated with the above-mentioned embodiments through high-layer signaling. For example, the specific information may also be information indicating activation (validation) of at least one of the above-mentioned embodiments, any RRC parameter for specific resources (e.g., Rel.18), etc.

[0304] In the case where the UE does not support at least one of the above-mentioned specific UE capabilities or is not set with the above-mentioned specific information, operations such as Rel.15 / 16 may also be applied.

[0305] (Note)

[0306] The following inventions are attached to one embodiment of the present disclosure.

[0307] [Note 1]

[0308] A terminal having:

[0309] a receiving unit, receiving information related to a plurality of resources for measuring channel state information (CSI) for coherent joint transmission (CJT); and

[0310] a control unit, performing said measurement based on said information,

[0311] The information complies with at least one of the following constraints: the plurality of resources, the plurality of ports associated with the plurality of resources, the duration of the plurality of resources, the quasi co-location (QCL) of the plurality of ports, and a terminal.

[0312] [Note 2]

[0313] The terminal as described in Note 1,

[0314] The multiple resources are at least one of non-zero power CSI reference signal NZP CSI-RS resources and CSI interference measurement IM resources, corresponding to the CSI report setting, the terminal, the bandwidth part (BWP), the component carrier (CC), and at least one of the activated BWPs in all CCs used for the measurement.

[0315] [Note 3]

[0316] A terminal as described in Note 1 or Note 2,

[0317] The period is a continuous time slot without switching between downlink and uplink, or a discontinuous reception (DRX) activation time.

[0318] [Note 4]

[0319] A terminal as described in any one of Notes 1 to 3,

[0320] For any of the demodulation reference signal of the physical downlink shared channel, the demodulation reference signal of the physical downlink control channel, and the CSI-RS resource, the transmission configuration information (TCI) status is indicated except for the specific QCL type that is not accompanied by tracking reference signal information and repeated NZP CSI-RS resources.

[0321] (Wireless Communication System)

[0322] Hereinafter, a configuration of a wireless communication system according to an embodiment of the present disclosure will be described. In the wireless communication system, communication is performed using any one of the wireless communication methods according to the above-mentioned embodiments of the present disclosure or a combination thereof.

[0323] Fig.11 1 is a diagram showing an example of a schematic structure of a wireless communication system involved in one embodiment. The wireless communication system 1 may also be a system that implements communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3GPP), the fifth generation mobile communication system New Radio (5G NR), and the like.

[0324] In addition, the wireless communication system 1 can also support dual connectivity (Multi-RAT Dual Connectivity (MR-DC)) between multiple radio access technologies (Radio Access Technology (RAT)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA))) and NR (E-UTRA-NR Dual Connectivity (E-UTRA-NR Dual Connectivity (EN-DC))), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

[0325] 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.

[0326] 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)).

[0327] 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 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 base stations 10.

[0328] 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).

[0329] Each CC may also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may also be included in FR1, and the small cell C2 may also be included in FR2. For example, FR1 may be a frequency band below 6 GHz (below 6 GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). In addition, the frequency bands and definitions of FR1 and FR2 are not limited to these. For example, FR1 may also be equivalent to a frequency band higher than FR2.

[0330] Furthermore, in each CC, the user terminal 20 may perform communication using at least one of time division duplex (TDD) and frequency division duplex (FDD).

[0331] 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 (relay) may also be referred to as an IAB node.

[0332] 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.

[0333] The user terminal 20 may also be a terminal that supports at least one of communication modes such as LTE, LTE-A, and 5G.

[0334] 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.

[0335] 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 used as the radio access schemes for UL and DL.

[0336] As downlink channels, the wireless communication system 1 may use a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH))), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc.

[0337] In addition, as uplink channels, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20), an uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (Physical Random Access Channel (PRACH)) and the like can also be used in the wireless communication system 1.

[0338] User data, high-layer control information, system information block (SIB), etc. are transmitted through PDSCH. User data, high-layer control information, etc. can also be transmitted through PUSCH. In addition, master information block (MIB) can also be transmitted through PBCH.

[0339] 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.

[0340] In addition, the DCI for scheduling the PDSCH may also be referred to as DL allocation, DL DCI, etc., and the DCI for scheduling the PUSCH may also be referred to as UL grant, UL DCI, etc. In addition, the PDSCH may also be rewritten as DL data, and the PUSCH may also be rewritten as UL data.

[0341] In the detection of PDCCH, the control resource set (CORESET) and the search space can also be used. CORESET corresponds to the resources for searching DCI. The search space corresponds to the search area and search method of PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor the CORESET associated with a search space based on the search space setting.

[0342] A search space may also correspond to a PDCCH candidate corresponding to 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 rewritten mutually.

[0343] Uplink control information (uplink control information (UCI)) including at least one of channel state information (CSI), delivery confirmation information (e.g., also known as hybrid automatic repeat request confirmation (HARQ-ACK), ACK / NACK, etc.), and scheduling request (SR) can also be transmitted through PUCCH. The random access preamble used to establish a connection with a cell can also be transmitted through PRACH.

[0344] In the present disclosure, downlink, uplink, etc. may be expressed without the word “link.” In addition, various channels may be expressed without the word “physical” at the beginning.

[0345] In the wireless communication system 1, a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), etc. can also be transmitted. As DL-RS, in the wireless communication system 1, a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), a positioning reference signal (Positioning Reference Signal (PRS)), a phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), etc. can also be transmitted.

[0346] The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may also be referred to as SS / PBCH block, SS block (SSB), etc. In addition, SS, SSB, etc. may also be referred to as reference signals.

[0347] 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).

[0348] (Base Station)

[0349] Fig.121 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.

[0350] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also assumed that the base station 10 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may also be omitted.

[0351] 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 common knowledge in the technical field to which the present disclosure relates.

[0352] 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.

[0353] 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 common knowledge in the technical field involved in the present disclosure.

[0354] The transmitting and receiving unit 120 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 1211 and an RF unit 122. The receiving unit may also be configured as a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

[0355] The transmitting / receiving antenna 130 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] 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 (filtering processing), discrete Fourier transform (Discrete Fourier Transform (DFT)) processing (as needed), inverse fast Fourier transform (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.

[0360] The transmitting and receiving unit 120 (RF unit 122 ) may also perform modulation, filter processing, amplification, etc. on the baseband signal to a radio frequency band, and transmit the signal in the radio frequency band via the transmitting and receiving antenna 130 .

[0361] On the other hand, the transmitting and receiving unit 120 (RF unit 122 ) may also 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 130 .

[0362] 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 acquired baseband signal to obtain user data, etc.

[0363] 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 (Received Signal Strength Indicator (RSSI))), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 110.

[0364] 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.

[0365] In addition, the transmission unit and the reception unit of the base station 10 in the present disclosure may also be constituted by at least one of the transmission and reception unit 120 , the transmission and reception antenna 130 , and the transmission path interface 140 .

[0366] The transmitting and receiving unit 120 may also transmit information related to a plurality of resources for measuring channel state information (CSI) for coherent joint transmission (CJT). The control unit 110 may also control the reception of the measurement report based on the information. The information may also comply with at least one of the following restrictions: the plurality of resources, the plurality of ports associated with the plurality of resources, the period of the plurality of resources, and the quasi co-location (QCL) of the plurality of ports.

[0367] (User Terminal)

[0368] Fig.13 2 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. In addition, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided with one or more.

[0369] In addition, in this example, the functional blocks of the characteristic parts in this embodiment are mainly shown, and it is also conceivable that the user terminal 20 also has other functional blocks required for wireless communication. Part of the processing of each unit described below may be omitted.

[0370] 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 common knowledge in the technical field to which the present disclosure relates.

[0371] 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.

[0372] 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 common knowledge in the technical field involved in the present disclosure.

[0373] The transmitting and receiving unit 220 may be configured as an integrated transmitting and receiving unit, or may be configured as a transmitting unit and a receiving unit. The transmitting unit may also be configured as a transmitting processing unit 2211 and an RF unit 222. The receiving unit may also be configured as a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

[0374] The transmitting / receiving antenna 230 can be constituted by an antenna described based on common knowledge in the technical field involved in the present disclosure, such as an array antenna.

[0375] The transmitting and receiving unit 220 may also receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting and receiving unit 220 may also transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0376] 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.

[0377] 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.

[0378] 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.

[0379] 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 valid (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.

[0380] 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 .

[0381] 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 .

[0382] 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.

[0383] 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.

[0384] In addition, the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may also be composed of at least one of the transmitting and receiving unit 220 and the transmitting and receiving antenna 230 .

[0385] The transmitting and receiving unit 220 may also receive information related to a plurality of resources for measuring channel state information (CSI) for coherent joint transmission (CJT). The control unit 210 may also perform the measurement based on the information. The information may also comply with at least one of the following restrictions: the plurality of resources, the plurality of ports associated with the plurality of resources, the period of the plurality of resources, and the quasi co-location (QCL) of the plurality of ports.

[0386] It may also be that the multiple resources are at least one of non-zero power CSI reference signal NZP CSI-RS resources and CSI interference measurement IM resources, corresponding to the CSI report setting, the terminal, the bandwidth part (BWP), the component carrier (CC), and at least one of the activated BWPs in all CCs used for the measurement.

[0387] The period may also be a continuous time slot without switching between downlink and uplink, or the same discontinuous reception (DRX) activation time.

[0388] For any of the demodulation reference signal of the physical downlink shared channel, the demodulation reference signal of the physical downlink control channel, and the CSI-RS resource, the transmission configuration information (TCI) status can also be indicated except for the specific QCL type that is not accompanied by tracking reference signal information and repeated NZP CSI-RS resources.

[0389] (Hardware Structure)

[0390] 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.

[0391] 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.

[0392] 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. Fig.14 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0393] In addition, in the present disclosure, the terms such as device, circuit, equipment, section, unit, etc. can be interchangeably used. 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.

[0394] 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.

[0395] 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.

[0396] 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.

[0397] In addition, the processor 1001 reads the program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and performs various processes based on them. As a program, a program that causes a computer to perform at least a part of the operations described in the above-mentioned embodiments can be used. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same can be implemented for other functional blocks.

[0398] The memory 1002 may also be a computer-readable recording medium, for example, composed of at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), 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.

[0399] The storage 1003 may also be a computer-readable recording medium, such as a flexible disk, a floppy disk, an optical disk (such as a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (Blu-ray) (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (such as a card, a stick, a key drive), a magnetic stripe, a database, a server, or at least one of other suitable storage media. The storage 1003 may also be referred to as an auxiliary storage device.

[0400] The communication device 1004 is hardware (transmitting and receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, etc. In order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, the above-mentioned transmitting and receiving unit 120 (220), the transmitting and receiving antenna 130 (230), etc. may also be realized by the communication device 1004. The transmitting and receiving unit 120 (220) may also be realized by physically or logically separating the transmitting unit 120a (220a) and the receiving unit 120b (220b).

[0401] 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).

[0402] 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.

[0403] In addition, the base station 10 and the user terminal 20 may also be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and the hardware may be used to implement a part or all of each functional block. For example, the processor 1001 may also be implemented using at least one of these hardware.

[0404] (Variation Example)

[0405] 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 rewritten 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.

[0406] 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).

[0407] Here, the parameter set may also be 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 a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filter processing performed by a transmitter and receiver in the frequency domain, a specific windowing processing performed by a transmitter and receiver in the time domain, and the like.

[0408] 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.

[0409] 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.

[0410] 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 replaced with each other.

[0411] For example, a subframe may be referred to as a TTI, a plurality of consecutive subframes may be referred to as a TTI, and a time slot or a mini time slot may be referred to as a TTI. That is, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. In addition, the unit representing a TTI may be referred to as a time slot, a mini time slot, etc. instead of a subframe.

[0412] 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.

[0413] TTI may also be a transmission time unit for a data packet (transport block), a code block, a code word, etc. that has been channel-coded, and may also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is given, the time interval (e.g., the number of symbols) to which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.

[0414] In addition, when a time slot or a mini time slot is called TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) can also be the minimum time unit of scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit of scheduling can also be controlled.

[0415] 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.

[0416] In addition, a long TTI (e.g., normal TTI, subframe, etc.) can also be rewritten as a TTI with a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) can also be rewritten as a TTI with a TTI length shorter than that of the long TTI and longer than 1 ms.

[0417] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may also be the same regardless of the parameter set, for example, 12. The number of subcarriers included in an RB may also be determined based on the parameter set.

[0418] 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.

[0419] 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.

[0420] In addition, a resource block may be composed of one or more resource elements (RE). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0421] Bandwidth Part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a carrier. Here, common RBs may also be identified by the index of the RB relative to the common reference point of the carrier. PRBs may also be defined in a BWP and numbered within the BWP.

[0422] The BWP may include a ULBWP (BWP for UL) and a DL BWP (BWP for DL). For a UE, one or more BWPs may be configured in one carrier.

[0423] At least one of the set BWPs may be activated, and the UE may not assume that it will transmit or receive a specific signal / channel other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be rewritten as "BWP".

[0424] 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.

[0425] 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.

[0426] In the present disclosure, the names used for parameters, etc. are not limiting in all respects. Furthermore, the mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting in all respects.

[0427] Information, signals, etc. described in this disclosure may also be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be mentioned throughout the above description may also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0428] Furthermore, information, signals, etc. can be output in at least one of the following directions: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, etc. can also be input and output via multiple network nodes.

[0429] 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.

[0430] The notification of information is not limited to the aspects / 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.

[0431] 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)).

[0432] 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).

[0433] 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).

[0434] Whether software is called software, firmware, middle-ware, microcode, hardware description language, or other names, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, program, sub-program, software modules, applications, software applications, software packages, routines, sub-routines, objects, executable files, execution threads, procedures, functions, etc.

[0435] 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.

[0436] 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.

[0437] 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.

[0438] In the present disclosure, terms such as "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. There are also cases where base stations are referred to by terms such as macro cell, small cell, micro-micro cell, and micro-micro cell.

[0439] 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.

[0440] In the present disclosure, the base station sending information to the terminal may also rewrite the base station instructing the terminal to perform control / operation based on the information.

[0441] In the present disclosure, terms such as “mobile station (MS)”, “user terminal”, “user device (User Equipment (UE))”, and “terminal” can be used interchangeably.

[0442] There are also cases where a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand set, user agent, mobile client, client or several other appropriate terms.

[0443] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a wireless communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving object, a moving object body, etc.

[0444] The mobile body refers to a movable object, and the moving speed is arbitrary, including the situation where the mobile body stops. The mobile body includes, for example, vehicles, transport vehicles, motor vehicles, two-wheeled motor vehicles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, two-wheel trailers, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, drones, multi-rotor aircraft, quad-rotor aircraft, hot air balloons and objects carried on them, but are not limited to these. In addition, the mobile body can also be a mobile body that drives autonomously based on operating instructions.

[0445] The mobile body may be a means of transportation (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous 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 during communication operations. 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.

[0446] Fig.15 1 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.

[0447] The driving unit 41 is composed of at least one of an engine, a motor, or a combination of an engine and a motor. The steering unit 42 is composed of at least a steering wheel (also called a handle), and steers at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user.

[0448] The electronic control unit 49 is composed of a microprocessor 61, a memory (ROM, RAM) 62, and a communication port (for example, an input / output (IO) port) 63. Signals from various sensors 50-58 provided in the vehicle are input to the electronic control unit 49. The electronic control unit 49 may also be referred to as an electronic control unit (ECU).

[0449] As signals from various sensors 50-58, there are current signals from the current sensor 50 for sensing the current of the motor, speed signals of the front wheels 46 / rear wheels 47 obtained by the speed sensor 51, air pressure signals of the front wheels 46 / rear wheels 47 obtained by the air pressure sensor 52, vehicle speed signals obtained by the vehicle speed sensor 53, acceleration signals obtained by the acceleration sensor 54, depression amount signals of the accelerator pedal 43 obtained by the accelerator pedal sensor 55, operation signals of the shift lever 45 obtained by the shift lever sensor 57, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 58, and the like.

[0450] The information service unit 59 is composed of various devices for providing (outputting) various information such as driving information, traffic information, entertainment information, etc., such as a navigation system, an audio system, a speaker, a display, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 59 uses information obtained from an external device via the communication module 60, etc. to provide various information / services (for example, multimedia information / multimedia services) to the occupants of the vehicle 40.

[0451] The information service unit 59 may include input devices for accepting input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touchpad, etc.), and may also include output devices for implementing output to the outside (e.g., display, speaker, LED light, touchpad, etc.).

[0452] The driving assistance system unit 64 is composed of various devices that provide functions for preventing accidents or reducing the driver's driving burden, such as millimeter wave radar, light detection and ranging (LiDAR), camera, positioning detector (for example, Global Navigation Satellite System (GNSS), etc.), map information (for example, High Definition (HD) map, Autonomous Vehicle (AV) map, etc.), gyroscope system (for example, inertial measurement unit (Inertial Measurement Unit (IMU))), inertial navigation unit (Inertial Navigation System (INS)), etc.), artificial intelligence (AI) chip, AI processor, and one or more ECUs that control these devices. In addition, the driving assistance system unit 64 sends and receives various information via the communication module 60 to realize the driving assistance function or the automatic driving function.

[0453] The communication module 60 can communicate with the microprocessor 61 and the structural elements of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) with the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the microprocessor 61 and the memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58 of the vehicle 40 via the communication port 63.

[0454] The communication module 60 can be controlled by the microprocessor 61 of the electronic control unit 49, and is a communication device that can communicate with an external device. For example, various information is sent and received with the external device via wireless communication. The communication module 60 can be inside or outside the electronic control unit 49. The external device can also be, for example, the above-mentioned base station 10, user terminal 20, etc. In addition, the communication module 60 can also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it can also function as at least one of the base station 10 and user terminal 20).

[0455] The communication module 60 may also transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as an input unit that receives input. For example, the PUSCH transmitted through the communication module 60 may also include information based on the above input.

[0456] The communication module 60 receives various information (traffic information, traffic light information, vehicle information, etc.) sent from an external device, and displays it on the information service unit 59 provided in the vehicle. The information service unit 59 may also be referred to as an output unit that outputs information (for example, information output to a display, a speaker, etc. based on the PDSCH received by the communication module 60 (or data / information decoded from the PDSCH)).

[0457] In addition, the communication module 60 stores various information received from the external device in the memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 can also control the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axle 48, the various sensors 50-58, etc., which are provided in the vehicle 40.

[0458] In addition, the base station in the present disclosure may also be rewritten as a user terminal. For example, various aspects / 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, may also be referred to as device-to-device (D2D)), vehicle-to-everything (V2X), etc.). In this case, it may also be set as a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, terms such as "uplink", "downlink", etc. may also be rewritten as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, uplink channels, downlink channels, etc. may also be rewritten as sidelink channels.

[0459] Likewise, the user terminal in the present disclosure may be rewritten as a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

[0460] In the present disclosure, the actions are assumed to be performed by the base station, and sometimes by its upper node (uppernode) depending on the situation. Obviously, in a network including one or more network nodes having a base station, various operations performed for communication with a terminal can be performed by the base station, one or more network nodes other than the base station (for example, considering the Mobility Management Entity (MME)), the Serving-Gateway (S-GW), etc., but not limited to these) or a combination thereof.

[0461] The various aspects / implementations described in this disclosure may be used individually or in combination, and may be used in a switched manner as the execution progresses. In addition, the processing procedures, sequences, flow charts, etc. of the various aspects / 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.

[0462] The various aspects / embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), systems using other appropriate wireless communication methods, and next-generation systems that are expanded, modified, created or specified based on them. In addition, multiple systems can also be combined (for example, LTE or LTE-A, combination with 5G, etc.) for application.

[0463] The phrase “based on” used in the present disclosure does not mean “based only on” unless otherwise specified. In other words, the phrase “based on” means both “based only on” and “based at least on”.

[0464] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not fully define the amount or order of these elements. These terms can be used in this disclosure as a convenient method to distinguish between two or more elements. Therefore, reference to the first and second elements does not mean that only two elements can be used or that the first element must take precedence over the second element in some form.

[0465] The term "determining" used in the present disclosure may include a variety of actions. For example, "determining" may also refer to situations where judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database or other data structure), ascertaining, etc. are considered to be "determining".

[0466] In addition, "judgment (decision)" may also be a situation where receiving (for example, receiving information), sending (for example, sending information), input (input), output (output), accessing (for example, accessing data in a memory), etc. are regarded as making a "judgment (decision)".

[0467] In addition, "judgment (decision)" can also be regarded as a situation where resolving, selecting, choosing, establishing, comparing, etc. are regarded as a situation where "judgment (decision)" is performed. That is, "judgment (decision)" can also be regarded as a situation where some actions are regarded as a situation where "judgment (decision)" is performed.

[0468] In addition, "judge (decide)" can also be rewritten as "assuming (assuming)", "expecting (expecting)", "considering (considering)" and so on.

[0469] The “maximum transmit power” recorded in the present disclosure may refer to the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0470] The terms "connected", "coupled", or all their variations used in this disclosure refer to all direct or indirect connections or combinations between two or more elements, and may include the situation where one or more intermediate elements exist between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may also be rewritten as "access".

[0471] In the present disclosure, when two elements are connected, it is possible to consider being "connected" or "combined" to each other using one or more wires, cables, printed electrical connections, etc., as well as using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, light (both visible and invisible) region, etc. as several non-limiting and non-inclusive examples.

[0472] In the present disclosure, the term "A is different from B" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same manner as "different".

[0473] When the terms “include,” “including,” and variations thereof are used in the present disclosure, these terms have an inclusive meaning, similar to the term “comprising.” Furthermore, the term “or” used in the present disclosure does not have an exclusive OR meaning.

[0474] 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.

[0475] In the present disclosure, "below", "less than", "above", "more than", "equal to", etc. may be rephrased with each other. Furthermore, in the present disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. are not limited to the original degree, comparative degree and superlative degree, but may be rephrased with each other. Furthermore, in the present disclosure, expressions with "ith" (i is an arbitrary integer) attached to terms meaning "good", "bad", "big", "small", "high", "low", "early", "late", "wide", "narrow", etc. are not limited to the original degree, comparative degree and superlative degree, but may be rephrased with each other (for example, "highest" and "i-th highest" may be rephrased with each other).

[0476] In the present disclosure, “of,” “for,” “regarding,” “related to,” “associated with,” etc. may also be replaced by each other.

[0477] The invention involved in the present disclosure has been described in detail above, but it is obvious to those skilled in the art that the invention involved in the present disclosure is not limited to the embodiments described in the present disclosure. The invention involved in the present disclosure can be implemented as a modified and altered mode without departing from the gist and scope of the invention determined based on the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative description and does not have any limiting meaning on the invention involved in the present disclosure.

Claims

1. A terminal having: A receiving unit, receiving information related to a plurality of resources used to measure channel state information CSI for coherent joint transmission CJT; and a control unit, performing said measurement based on said information, The information complies with at least one restriction of the plurality of resources, a plurality of ports associated with the plurality of resources, a period of the plurality of resources, and a quasi-co-located QCL of the plurality of ports.

2. The terminal according to claim 1, wherein: The multiple resources are at least one of non-zero power NZP CSI reference signal CSI-RS resources and CSI interference measurement IM resources, and correspond to at least one of the CSI report settings, the terminal, the bandwidth part BWP, the component carrier CC, and the activated BWP in all CCs used for the measurement.

3. The terminal according to claim 1, wherein: The period is a continuous time slot without switching between downlink and uplink, or the same discontinuous reception DRX activation time.

4. The terminal according to claim 1, wherein: For any of the demodulation reference signal of the physical downlink shared channel, the demodulation reference signal of the physical downlink control channel, and the CSI-RS resource, the TCI state of the sending setting information is indicated except for the tracking reference signal information and the specific QCL type of the NZP CSI-RS resource without repetition.

5. A communication method of a terminal, comprising the following steps: Receiving information related to a plurality of resources for measuring channel state information CSI for coherent joint transmission CJT; and performing said measuring based on said information, The information complies with at least one restriction of the plurality of resources, a plurality of ports associated with the plurality of resources, a period of the plurality of resources, and a quasi-co-located QCL of the plurality of ports.

6. A base station, comprising: A sending unit, sending information related to a plurality of resources for measuring channel state information CSI for coherent joint transmission CJT; and a control unit, based on said information, controlling the reception of reports of said measurements, The information complies with at least one restriction of the plurality of resources, a plurality of ports associated with the plurality of resources, a period of the plurality of resources, and a quasi-co-located QCL of the plurality of ports.

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