[go: up one dir, main page]

WO2025177339A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base

Info

Publication number
WO2025177339A1
WO2025177339A1 PCT/JP2024/005745 JP2024005745W WO2025177339A1 WO 2025177339 A1 WO2025177339 A1 WO 2025177339A1 JP 2024005745 W JP2024005745 W JP 2024005745W WO 2025177339 A1 WO2025177339 A1 WO 2025177339A1
Authority
WO
WIPO (PCT)
Prior art keywords
csi
report
resource
channel
resources
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/005745
Other languages
English (en)
Japanese (ja)
Inventor
尚哉 芝池
祐輝 松村
聡 永田
ジン ワン
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTT Docomo Inc filed Critical NTT Docomo Inc
Priority to PCT/JP2024/005745 priority Critical patent/WO2025177339A1/fr
Publication of WO2025177339A1 publication Critical patent/WO2025177339A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • 3GPP Rel. 10-14 LTE-Advanced (3GPP Rel. 10-14) was specified with the aim of achieving even greater capacity and sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8 and 9).
  • LTE 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • NR New Radio
  • one of the objectives of this disclosure is to provide a terminal, wireless communication method, and base station that can properly communicate even when CJT using multiple TRPs/multiple panels is supported.
  • QCL is an index that indicates the statistical properties of a signal/channel. For example, if a signal/channel has a QCL relationship with another signal/channel, it may mean that it can be assumed that at least one of the Doppler shift, Doppler spread, average delay, delay spread, and spatial parameters (e.g., spatial Rx parameters) is the same between these different signals/channels (i.e., they have QCL with respect to at least one of these).
  • the spatial reception parameters may correspond to the reception beam of the UE (e.g., a reception analog beam), and the beam may be identified based on the spatial QCL.
  • the QCL (or at least one element of the QCL) may be interpreted as sQCL (spatial QCL).
  • QCL types A plurality of types (QCL types) of QCL may be defined. For example, four QCL types A to D may be provided, each having different parameters (or parameter sets) that can be assumed to be the same.
  • the parameters (which may be referred to as QCL parameters) are as follows: QCL Type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL Type B (QCL-B): Doppler shift and Doppler spread, QCL Type C (QCL-C): Doppler shift and mean delay, QCL Type D (QCL-D): Spatial reception parameters.
  • the UE may determine at least one of the transmit beam (Tx beam) and receive beam (Rx beam) for a signal/channel based on the TCI condition or QCL assumption of the signal/channel.
  • the physical layer signaling may be, for example, Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the RS that has a QCL relationship with the channel may be, for example, at least one of a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).
  • SSB synchronization signal block
  • CSI-RS channel state information reference signal
  • SRS sounding reference signal
  • TRS tracking CSI-RS
  • QRS QCL detection reference signal
  • TCI state may be interpreted interchangeably.
  • the RS used to generate the CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, a Synchronization Signal (SS), a Demodulation Reference Signal (DMRS), etc.
  • CSI-RS Channel State Information Reference Signal
  • SS/PBCH Synchronization Signal/Physical Broadcast Channel
  • SS Synchronization Signal
  • DMRS Demodulation Reference Signal
  • the CSI-RS may 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 that includes an SS and a PBCH (and corresponding DMRS), and may be referred to as an SS block (SSB).
  • the SS may also include at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • CSI includes the Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS/PBCH Block Resource Indicator (SSBRI), and Layer Indicator (Layer Indicator). It may include at least one of L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), L1-SNR (Signal to Noise Ratio), etc.
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • CRI CSI-RS Resource Indicator
  • SSBRI SS/PBCH Block Resource Indicator
  • Layer Indicator Layer Indicator
  • the reporting configuration information may include, for example, at least one of the following: Information about the type of CSI report (report type information, e.g., RRC IE “reportConfigType”) Information on one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, for example, the RRC IE “reportQuantity”) Information about the RS resource used to generate the amount (the CSI parameter) (resource information, for example, the “CSI-ResourceConfigId” of the RRC IE) Information about the frequency domain to which the CSI is reported (frequency domain information, for example, the RRC IE “reportFreqConfiguration”)
  • the report type information may indicate periodic CSI (P-CSI) reporting, aperiodic CSI (A-CSI) reporting, or semi-persistent CSI (SP-CSI) reporting.
  • P-CSI periodic CSI
  • A-CSI aperiodic CSI
  • SP-CSI semi-persistent CSI
  • the reporting amount information may specify a combination of at least one of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).
  • CSI parameters e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.
  • the resource information may also be the ID of a resource for the RS.
  • the resource for the RS may include, for example, a non-zero-power CSI-RS resource or SSB, and a CSI-IM resource (e.g., a zero-power CSI-RS resource).
  • Frequency domain information may also indicate the frequency granularity of CSI reporting.
  • the frequency granularity may include, for example, wideband and subband.
  • the wideband is the entire CSI reporting band.
  • the wideband may be, for example, the entirety of a certain carrier (component carrier (CC)), cell, serving cell), or the entire bandwidth part (BWP) within a certain carrier.
  • the wideband may also be referred to as the CSI reporting band, the entire CSI reporting band, etc.
  • a subband may be a portion of a wideband and may be composed of one or more resource blocks (RBs or PRBs).
  • the size of the subband may be determined according to the size of the BWP (number of PRBs).
  • the frequency domain information may indicate whether wideband or subband PMI is to be reported (the frequency domain information may include, for example, the RRC IE "pmi-FormatIndicator" used to determine whether wideband PMI reporting or subband PMI reporting is to be performed).
  • the UE may determine the frequency granularity of the CSI report (i.e., whether wideband PMI reporting or subband PMI reporting) based on at least one of the above-mentioned reporting amount information and frequency domain information.
  • one wideband PMI may be reported for the entire CSI reporting band
  • subband PMI reporting is configured, a single wideband indication i 1 may be reported for the entire CSI reporting band, and one subband indication i 2 (e.g., one subband indication for each subband) may be reported for each of one or more subbands within the entire CSI reporting band.
  • the UE performs channel estimation using the received RS and estimates the channel matrix H.
  • the UE then feeds back an index (PMI) determined based on the estimated channel matrix.
  • PMI index
  • the PMI may indicate the precoder matrix (also simply referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmissions to the UE.
  • Each value of the PMI may correspond to one precoder matrix.
  • a set of PMI values may correspond to a set of different precoder matrices, called a precoder codebook (also simply referred to as a codebook).
  • a CSI report may include one or more types of CSI.
  • the CSI may include at least one of a first type (Type 1 CSI) used for selecting a single beam and a second type (Type 2 CSI) used for selecting multiple beams.
  • Single beam may be rephrased as a single layer, and multiple beams may be rephrased as multiple beams.
  • Type 1 CSI does not assume multi-user multiple input multiple output (MU-MIMO), while Type 2 CSI may assume multi-user MIMO.
  • the codebooks may include a codebook for Type 1 CSI (also referred to as a Type 1 codebook, etc.) and a codebook for Type 2 CSI (also referred to as a Type 2 codebook, etc.).
  • 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 defined for each.
  • Type 1 and Type I may be interpreted interchangeably.
  • Type 2 and Type II may be interpreted interchangeably.
  • the uplink control information (UCI) type may include at least one of the following: Hybrid Automatic Repeat request ACKnowledgement (HARQ-ACK), scheduling request (SR), and CSI.
  • HARQ-ACK Hybrid Automatic Repeat request ACKnowledgement
  • SR scheduling request
  • CSI CSI
  • the UCI may be carried by the PUCCH or the PUSCH.
  • UCI can contain one CSI part for wideband PMI feedback.
  • CSI report #n contains PMI wideband information if reported.
  • UCI can include two CSI parts for subband PMI feedback.
  • CSI Part 1 contains wideband PMI information.
  • CSI Part 2 contains one wideband PMI and some subband PMI information.
  • CSI Part 1 and CSI Part 2 are coded separately.
  • a UE is configured by higher layers with N (N ⁇ 1) CSI reporting configuration report settings and M (M ⁇ 1) CSI resource configuration resource settings.
  • the CSI reporting configuration 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), and report quantity (reportQuantity).
  • the resource settings for channel measurement, CSI-IM resource settings for interference, and NZP-CSI-RS settings for interference are each associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId).
  • the CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, e.g., NZP-CSI-RS resource set or CSI-IM resource set).
  • the UE is configured with parameters (Codebook Config) related to the codebook (CB) by higher layer signaling (RRC signaling).
  • the Codebook Config is included in the CSI Report Config (CSI-Report Config) of the higher layer (RRC) parameters.
  • At least one codebook is selected from multiple codebooks including type 1 single panel (typeI-SinglePanel), type 1 multi-panel (typeI-MultiPanel), type 2 (typeII), and type 2 port selection (typeII-PortSelection).
  • the codebook parameters include parameters related to the codebook subset restriction (CBSR) ("...Restriction” in CodebookConfig).
  • CBSR codebook subset restriction
  • the CBSR setting is a bit that indicates which PMI reports are allowed ("1") and which are not allowed ("0") for the precoder associated with the CBSR bit.
  • One bit in the CBSR bitmap corresponds to one codebook index/antenna port.
  • the CSI reporting configuration (CSI-ReportConfig) of Rel. 16 includes a channel measurement resource (CMR), an interference measurement resource (IMR), etc. in addition to a codebook configuration (CodebookConfig).
  • the IMR may be at least one of a zero power-interference measurement resource (ZP-IMR) and a non-zero power-interference measurement resource (NZP-IMR).
  • ZP-IMR zero power-interference measurement resource
  • NZP-IMR non-zero power-interference measurement resource
  • CMR, NZP CSI-RS resources, and resourcesForChannelMeasurement may be interchangeable.
  • ZP-IMR, CSI-IM resources, and csi-IM-ResourcesForInterference may be interchangeable.
  • NZP-IMR, NZP CSI-RS resources for interference measurement, and nzp-CSI-RS-ResourcesForInterference may be interchangeable.
  • an extended CSI reporting configuration (CSI-ReportConfig) is being considered for CSI measurement/reporting of multi-TRP using NCJT.
  • CSI-ReportConfig an extended CSI reporting configuration
  • two CMR groups are configured, one for each of the two TRPs.
  • the CMRs in a CMR group may be used for at least one of multi-TRP and single-TRP measurements using NCJT.
  • the N CMR pairs of the NCJT are configured by RRC signaling.
  • the UE may be configured by RRC signaling to determine whether to use a CMR in a CMR pair for single-TRP measurements.
  • the UE may be configured to report one CSI associated with the best measurement result among the measurement hypotheses for NCJT and single TRP.
  • the CBSR is configured for each codebook setting for each CSI reporting setting.
  • the CBSR applies to all CMRs, etc. within the corresponding CSI reporting setting.
  • the multiple subbands for a given CSI report #n as indicated by the higher layer parameter csi-ReportingBand may be numbered consecutively in ascending order, with the lowest subband in csi-ReportingBand as subband 0.
  • two polarizations, a first polarization and a second polarization, and a horizontal polarization and a vertical polarization may be interchangeable.
  • one polarization, one of the first polarization and the second polarization, and one of the horizontal polarization and the vertical polarization may be interchangeable.
  • co-phasing, phase difference, phase compensation between polarizations, and ⁇ may be interchangeable.
  • Type 1 codebook Type 1 single-panel codebook
  • Type 1 multi-panel codebook may be interpreted interchangeably.
  • Type 1 Single Panel Codebook For Rel. 15 Type 1 Single Panel CSI, the UE sets the codebook type upper layer parameter (subType in type1 in codebookType in CodebookConfig) to Type 1 Single Panel ('typeI-SinglePanel'). If the number of layers v is not ⁇ 2,3,4 ⁇ , the PMI values correspond to three codebook indices i1,1 , i1,2 , and i2 . If the number of layers v is ⁇ 2,3,4 ⁇ , the PMI values correspond to four codebook indices i1,1 , i1,2 , i1,3 , and i2 .
  • the supported settings (combinations of values) of ( N1 , N2 ) and ( O1 , O2 ) are defined in the specification.
  • ( N1 , N2 ) indicates the number of two-dimensional (2D) antenna elements and is set by the upper layer parameters n1-n2 in moreThanTwo in nrOfAntennaPorts in typeI - SinglePanel .
  • n1-n2 are N1O1N2O2 - bit bitmap parameters.
  • O1 , O2 ) is the 2D oversampling factor.
  • l,l',l'',l'' are determined by i1,1 and k1 .
  • m,m',m'',m'' are determined by i1,2 and k2 .
  • n is determined by i 2.
  • p is 0 for the first half of the P CSI-RS ( ⁇ 16) ports and 1 for the second half of the P CSI-RS ( ⁇ 16) ports.
  • the precoding matrix W can be expressed as the product of two matrices , W1W2 .
  • W1 indicates wideband and long-term channel properties and is represented by codebook index i1 (e.g., i1,1 and i1,2 ).
  • i1,1 and i1,2 indicate beam selection in two dimensions, respectively.
  • W2 indicates frequency selectivity (subband) and short-term channel properties and is represented by codebook index i2 .
  • i2 may indicate phase adjustment between the two polarizations.
  • W1 may be given by the following equation E1 using matrix B:
  • B shows L 2D DFT beams, each oversampled by (O 1 , O 2 ).
  • the precoding matrix Wl ,m,n (1) for one-layer CSI reporting using antenna ports 3000 to 2999+P CSI-RS is given by the following equation E2:
  • SD spatial domain
  • ⁇ p represents the phase of the second port relative to the phase of the first port.
  • the supported settings ( Ng , N1 , N2 ) and ( O1 , O2 ) are specified in the specification.
  • ( N1 , N2 ) are set by ng-n1-n2 in typeI-MultiPanel.
  • the antenna configuration parameters for the type 1 multi-panel codebook are ng-n1-n2 ( Ng , N1 , N2 ). In the existing specifications, ranks up to 4 are supported, but ranks above 5 are not supported.
  • Each PMI value corresponds to a codebook index i1 , i2 .
  • i1,4 [ i1,4,1 i1,4,2 i1,4,3 ].
  • i1,4 is related to the panel number Ng and the codebook mode.
  • i2 [ i2,0 i2,1 i2,2 ].
  • the number and value of i2 are related to the codebook mode and may differ from the Type 1 single-panel codebook.
  • i2 is the index for the subband.
  • wideband reporting is set, i2 is the index for the wideband.
  • codebook mode 1 the number and value of i2 are the same as in the Type 1 single-panel codebook, and i2 has one value for each subband.
  • the Type 1 multi-panel codebook is based on the Type 1 single-panel codebook.
  • the codebook for the first panel (panel 0) follows the Type 1 single-panel codebook.
  • the codebooks for the other panels apply the same precoder, with additional phase differences between the panels.
  • the precoding matrix for v-layer CSI reporting using 2999+P CSI-RS from antenna port 3000 is denoted by W (v) .
  • the precoding matrix W l,m,p,n (1) for 1-layer CSI reporting is denoted by W l,m,p,n 1,N_g,1 .
  • the precoding matrix W l,l',m,m',p,n (2) for 2-layer CSI reporting is denoted by (1/sqrt(2))[W l,m,p,n (1,N_g,1) W l',m',p,n (2,N_g,1) ].
  • ⁇ n ej ⁇ n/2 .
  • Ng 2
  • p p1
  • Ng 4
  • p [ p1 , p2 , p3 ].
  • ⁇ p_1 , ⁇ p_2 , and ⁇ p_3 represent inter-panel phase differences (inter-panel phase compensation).
  • rows 1 and 2 correspond to the first panel (panel 0)
  • rows 3 and 4 correspond to the second panel (panel 1)
  • rows 5 and 6 correspond to the third panel (panel 2)
  • rows 7 and 8 correspond to the fourth panel (panel 3).
  • each row has the same vl ,m .
  • ⁇ p_1 represents the phase difference of the second panel relative to the first panel.
  • ⁇ p_2 represents the phase difference of the third panel relative to the first panel.
  • ⁇ p_3 represents the phase difference of the fourth panel relative to the first panel.
  • the precoding matrix Wl ,m,p,n (1) for one-layer CSI reporting is denoted by Wl,m,p,n1,2,1.
  • the precoding matrix Wl,l',m,m',p,n (2) for two - layer CSI reporting is denoted by (1/sqrt(2)) [Wl ,m,p, n1,2,2 Wl',m',p, n2,2,2 ], where Wl,m,p, n1,2,2 and Wl ,m,p, n2,2,2 are given by the following equation E6.
  • ⁇ n_0 represents the phase difference of the second polarization of the first panel relative to the first polarization of the first panel for each subband.
  • b n_1 represents the phase difference of the first polarization of the second panel relative to the first polarization of the first panel for each subband.
  • b n_2 represents the phase difference of the second polarization of the second panel relative to the first polarization of the first panel for each subband.
  • type II codebook extended type II codebook
  • type II port selection (PS) codebook extended type II PS codebook
  • additional extended type II port PS codebook CJT codebook
  • Doppler codebook may be interchangeable.
  • Type 2 Codebook For type II codebook (Rel. 15, type 2 CSI), the UE is configured with the upper layer parameter codebookType set to 'type II'.
  • W 1 (N t ⁇ 2L) is 2L DFT vectors (oversampled DFT vectors) and indicates the selected spatial domain basis.
  • L ⁇ 2,4 ⁇ is the number of beams per layer. The actual number of beams considering two polarizations at one location is 2L.
  • Type-2 CSI the channel (channel matrix) for a user is represented by a linear combination of two polarizations and L SD beams. Rel. 15 Type-2 CSI supports ranks 1 and 2.
  • the PMI subband size is given by CQI subband size/R, where R ⁇ 1,2 ⁇ .
  • R is the ratio of the CQI subband size to the PMI subband size.
  • the number of FD DFT vectors Mv for a given rank v is given by ceil( pv ⁇ N3 /R).
  • the number of FD DFT vectors Mv is the same for all layers l ⁇ 1,2,3,4 ⁇ . pv is set by higher layers.
  • the dominant Mv FD DFT vectors are selected. By setting Mv ⁇ N3 , the overhead of W ⁇ l is significantly smaller than that of W2 ,l . All or some of the Mv FD DFT vectors are used to approximate the frequency response of each SD beam. A bitmap is used to report only the selected FD DFT vector for each SD beam. If no bitmap is reported, all FD DFT vectors are selected for each SD beam. In this case, the NZCs of all FD DFT vectors are reported for each SD beam.
  • Type 2 CSI feedback on PUSCH in Rel. 16 includes two parts.
  • CSI Part 1 has a fixed payload size and is used to identify the number of information bits in CSI Part 2.
  • the size of Part 2 is variable (the UCI size depends on the number of 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.
  • the base station knows the size of CSI Part 2 after receiving CSI Part 1.
  • CSI Part 1 includes the RI (if reported), the CQI, and an indicator of the total number of non-zero amplitude coefficients across layers for Enhanced Type 2 CSI.
  • the fields in Part 1, RI (if reported), CQI, and the indicator of the total number of non-zero amplitude coefficients across layers, are coded separately.
  • CSI Part 2 includes the PMI for Enhanced Type 2 CSI. Parts 1 and 2 are coded separately.
  • the CSI Part 2 includes at least one of the oversampling factor, the index of the SD basis corresponding to each SD beam, the index M initial of the initial FD DFT vector (starting offset) of the selected DFT window, the selected FD basis for each layer, the NZC (amplitude and phase) for each layer, the strongest coefficient indicator (SCI) for each layer, and the amplitude of the strongest coefficient for each layer/polarization.
  • k l,M_v-1 (3) [k l,0,f (3) ... k l,M_v-1,f (3) ], k l,i,f (3) ⁇ 0,1 ⁇ .
  • ⁇ i 1,8,l Strongest coefficient indicator for the lth layer (largest element k l,i,f (2) in the amplitude coefficient indicator).
  • f l * ⁇ ⁇ 0,1,...,M v -1 ⁇ be the index of i 2,4,l and i l * ⁇ ⁇ 0,1,...,2L-1 ⁇ be the index of k l,f_l ⁇ * (2) .
  • i 2,4,l , i 2,5,l , and i 1,7,l denote the amplitude coefficient, phase coefficient, and bitmap, respectively, after remapping.
  • Each reported LC coefficient (complex coefficient) in W ⁇ l is a separately quantized amplitude and phase.
  • i 1,5 and i 1,6,l are PMI indices for reporting on the FD basis. i 1,5 is reported only if N 3 >19.
  • the precoding matrix Wl is expressed by the following equation F3:
  • m_2 ⁇ (i) are DFT vectors representing the SD beams.
  • pl,0 (1) denotes the wideband amplitude coefficient.
  • pl,i,f (2) denotes the subband amplitude coefficient.
  • the codebook for each layer includes the strongest coefficient for each polarization, the amplitude coefficient for each polarization, each FD beam, and each SD beam, and the phase coefficient for each polarization, each FD beam, and each SD beam.
  • the PMI information is organized into three groups (groups 0 to 2). This is important in case of CSI omission.
  • Each reported element with index i2,4,l , i2,5,l , and i1,7,l is associated with a specific priority rule.
  • Type-1 CSI an SD beam represented using an SD DFT vector is sent towards the UE.
  • Type-2 CSI L SD beams are linearly combined and sent towards the UE.
  • Each SD beam can be associated with multiple FD DFT vectors (FD beam, FD basis, frequency response).
  • the channel frequency response can be obtained by linearly combining these FD DFT vectors.
  • the channel frequency response corresponds to the power delay profile.
  • Type 2 port selection (PS) CSI (Type 2 PS codebook)
  • PS Type 2 port selection
  • the UE is configured with the higher layer parameter codebookType set to 'typeII-PortSelection'.
  • Rel. 15's Type 2 port selection CSI the UE does not need to derive an SD beam by considering an SD DFT vector as in Type 2 CSI.
  • the base station transmits CSI-RS using K CSI-RS ports beamformed by considering a set of SD beams.
  • the UE selects/identifies the best L ( ⁇ K) CSI-RS ports for each polarization and reports their indices in W1 .
  • Rel. 15's Type 2 PS CSI supports ranks 1 and 2.
  • d is set using the higher layer parameter portSelectionSamplingSize, where d ⁇ 1,2,3,4 ⁇ and d ⁇ min(P CSI-RS /2,L).
  • L antenna ports are selected by i 1,1 , where i 1,1 ⁇ ⁇ 0, 1,..., ceil(P CSI-RS /(2d)) ⁇ 1 ⁇ .
  • Rel. 16 Type 2 PS CSI The operation of Rel. 16 Type 2 PS CSI is similar to Rel. 16 Type 2 CSI, except for SD beam selection.
  • Rel. 15 Type 2 PS CSI supports ranks 1 through 4.
  • the precoding matrix W l for generating a subband-wise (subband (SB)-wise) precoder is expressed by the following equation F4.
  • W l (N t ⁇ N 3 ) QW 1 W ⁇ l W f,l H (F4)
  • Q(N t ⁇ K) denotes the K SD beams used for CSI-RS beamforming.
  • W 1 (K ⁇ 2L) is a block diagonal matrix.
  • W ⁇ l (2L ⁇ M) is the LC coefficient matrix.
  • W f,l (N 3 ⁇ M) is a matrix consisting of M vectors (FD basis vectors), each containing N 3 FD bases.
  • K is set by upper layers.
  • L is set by upper layers.
  • JT joint transmission
  • TRPs multiple points
  • the UE uses the CMRs in the two CMR groups to measure single TRP CSI for TRP1 and single TRP CSI for TRP2, and measures NCJT CSI using the N CMR pairs.
  • the UE selects one or more CSIs to report based on the mode (CSI reporting mode) set by csi-ReportMode, which indicates one of the following two modes (NCJT CSI modes): Mode 1 and 2.
  • CSI reporting mode CSI reporting mode
  • NCJT CSI modes CSI reporting modes
  • ⁇ Mode 2 The UE is configured to report one CSI associated with the best one of the measurement assumptions of NCJT and single TRP.
  • New mapping orders (tables) of multiple fields within one CSI report are defined for some cases below.
  • the selection of the four TRPs may be semi-static. Therefore, the selection and configuration of the four CMRs (four CSI-RS resources) for channel measurement may also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but unlikely.
  • the path losses from the four TRPs to the UE are different, making it difficult to simply report a single aggregated CSI that represents the joint channel matrix.
  • NCJT i.e., single TRP
  • CSI per TRP i.e., single TRP CSI like the NCJT CSI in Rel. 17
  • W1 (matrix representing the SD DFT vector) / Wf (matrix representing the FD DFT vector) for each TRP may be the same or different.
  • Wl (NZC) for each TRP may be different.
  • W1 / Wf / Wl for each TRP may be selected jointly or individually. Different scenarios with different options for the design of W1 / Wf / Wl are preferred.
  • W ⁇ may be reported as an individual entity or within Wl . These used policies relate to deployment scenarios (e.g., intra-site multi-TRP or inter-site multi-TRP).
  • a precoding matrix for a 4-TRP CJT CSI may be represented by W 1 /W f /W l for each TRP.
  • W 1 for each TRP may be the same or different, and may be selected jointly or individually.
  • W l for each TRP may be different, selected jointly or individually.
  • W f for each TRP may be the same or different, and may be selected jointly or individually.
  • mode 1 There are two codebook mode settings for FD basis selection.
  • mode 2 the i 1,9 report is not required. All CSI-RS resources have the same FD basis selection.
  • ⁇ Mode 1 is SD/FD basis selection per TRP/TRP group. It allows independent FD basis selection across N TRPs/TRP groups. For example, its codebook structure is given by the following formula G1, where N is the number of TRPs or TRP groups.
  • ⁇ Mode 2 is SD basis selection per TRP/TRP group (port group or resource) and joint/common FD basis selection (across N TRPs/TRP groups).
  • its codebook structure is given by the following formula G2, where N is the number of TRPs or TRP groups.
  • the UE can be configured with N TRP ⁇ ⁇ 1, 2, 3, 4 ⁇ CSI-RS resources within a resource set for channel measurement.
  • the upper layer parameter paramCombination-CJT-L-r18 specifies a set of N L ⁇ ⁇ 1, 2, 4 ⁇ combinations of the values ⁇ L 1 ,..., L N_TRP ⁇ .
  • the value of N L is specified by the upper layer parameter numberOfSDCombinations.
  • the upper layer parameter paramCombination-CJT-PS-alpha-r18 specifies a set of N L ⁇ ⁇ 1, 2, 4 ⁇ combinations of values ⁇ 1 ,..., ⁇ N_TRP ⁇ .
  • the value of N L is specified by the upper layer parameter numberOfSDCombinations-PS.
  • the UE may configure the higher layer parameter restrictedCMR-Selection. If restrictedCMR-Selection is configured, the number of selected CSI-RS resources N is N TRPs . Otherwise, the UE is expected to select N CSI-RS resources, for 1 ⁇ N ⁇ N TRPs , and the selection is reported using a bitmap of N TRP bits.
  • selection/reporting of an SD beam for each CSI-RS resource is applied.
  • N TRPs may be the number of CSI-RS resources configured for CSI reporting or the number of TRPs for CJT.
  • ⁇ L ⁇ _1 ,...,L ⁇ _N ⁇ are the corresponding values from the selected combination of ⁇ L 1 ,...,L N_TRP ⁇ .
  • i 1,1 [i 1,1,1 ... i 1,1,N ]
  • i 1,1,j [q 1,j q 2,j ] q 1,j ⁇ 0,1,...,O 1 -1 ⁇ q 2,j ⁇ 0,1,...,O 2 -1 ⁇
  • i 1,2 [i 1,2,1 ... i 1,2,N ] i 1,2,j ⁇ 0,1,...,C(N 1 N 2 ,L ⁇ _j )-1 ⁇ (G3)
  • ⁇ ⁇ _1 ,..., ⁇ ⁇ _N ⁇ are the corresponding values from the selected combinations of ⁇ 1 ,..., ⁇ N_TRP ⁇ .
  • Doppler CSI/Type 2 Codebook It has been considered to extend/improve CSI reporting for UEs moving at high/medium speeds by utilizing time-domain correlation/Doppler-domain (DD) information. For example, it has been considered to improve the extended (Rel. 16) Type 2 codebook and the additional extended (Rel. 17) Type 2 PS codebook without changing the spatial and frequency domain basis, and to report from the UE the time-domain channel characteristics (time-domain correlation profile) measured via tracking CSI-RS (TRS).
  • TRS tracking CSI-RS
  • the channel coherent time depends on the maximum Doppler shift.
  • the channel coherent time is the time until the measured channel characteristics are available or until the measured channel characteristics become unavailable (channel aging).
  • the maximum Doppler shift is estimated by the relative velocity between the transmitter and receiver.
  • ⁇ f max v/ ⁇ .
  • the channel coherent time decreases. For example, at a carrier frequency of 4.5 GHz, when the moving speed exceeds approximately 25 km/h, the channel coherent time falls below 10 ms. How to deal with such high moving speeds and short channel coherent times becomes a problem.
  • TRS is supported to track the Doppler shift.
  • TRS has the following problems: ⁇ The number of ports per CSI-RS resource set is limited to only one. Each CSI-RS resource uses a single port. ⁇ The settable period is 10 ms or more. ⁇ CSI reporting is not assumed for TRS. There is no reporting configuration for P-TRS. Reporting can be configured, but the report quantity (reportQuantity) is set to 'none' only. A maximum of 16 CSI-RS resources are used per CSI-RS resource set.
  • TRS are allocated to time-domain and frequency-domain resources.
  • CMR can be used to measure the effects of Doppler shift.
  • RS used for measurement depends on the UE implementation.
  • the length of the Doppler domain (DD)/time domain (TD) basis vectors (DFT basis vectors) (the number of DD/TD bases) may be N4 .
  • One or more CSI occasions for calculating the CSI report may be measured within the CSI measurement window of slot [k, k+W meas ⁇ 1].
  • k may be a slot index
  • W meas may be the measurement window length (number of slots).
  • the CSI occasions may be configured in CSI-ReportConfig.
  • the CSI reporting window of slot [l, l+W CSI ⁇ 1] may be associated with the CSI report in slot n.
  • l may be a slot index
  • W CSI may be the reporting window length (number of slots).
  • the location of the CSI reference resource may be denoted as n ref .
  • the start of the CSI reporting window is slot l.
  • l may be (nN CSI,ref ).
  • l may be (n+ ⁇ ).
  • ⁇ may be ⁇ 0,2 ⁇ or ⁇ may be ⁇ 0,1,2 ⁇ .
  • a d slot may have a duration in DD units.
  • the UE When UE-side prediction is assumed, the UE is supported to predict the CSI/channel after slot l, and the position of slot l (from multiple candidates) is configured by the base station via higher layer signaling.
  • the multiple candidates for the slot l position include the legacy CSI reference resource position (nN CSI,ref ) and (n+ ⁇ ), where ⁇ >0.
  • the legacy CSI reference resource in legacy operation i.e., (nN CSI,ref ), is reused/repurposed to indicate the position of the last CSI-RS occasion used for CSI reporting.
  • the codebookParameter indicates the codebook (type) and corresponding parameters supported by the UE. Reporting parameters corresponding to Type 1 single panel is mandatory. Reporting parameters corresponding to Type 1 multi-panel, Type 2, and Type 2 port selection is optional.
  • the parameters may include at least one of maxNumberTxPortsPerResource, maxNumberResourcesPerBand, and totalNumberTxPortsPerBand.
  • maxNumberTxPortsPerResource indicates the maximum number of transmit ports within a resource.
  • maxNumberResourcesPerBand indicates the maximum number of resources that can be used simultaneously across all CCs within a band.
  • totalNumberTxPortsPerBand indicates the maximum number of transmit ports that can be used simultaneously across all CCs within a band.
  • CPU occupation number of occupied CPUs, number of CPUs, O CPU , and number of consumed CPUs may be read interchangeably.
  • the UE After CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report only if it has received at least one CSI-RS transmission occasion for channel measurement and a CSI-RS/CSI-IM occasion for interference measurement not later than the CSI reference resource. Otherwise, the UE drops the report.
  • CSI-ReportConfig For a CSI reporting configuration (CSI-ReportConfig) that includes a list of sub-configurations provided by csi-ReportSubConfigList, after CSI reporting (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE reports a CSI report containing one or more sub-reports only after receiving at least one CSI-RS transmission occasion for channel measurement and one CSI-RS/CSI-IM occasion for interference measurement for each sub-configuration, not later than the CSI reference resource. Otherwise, the UE drops the report.
  • the sub-configuration is the sub-configuration activated/triggered for SP-CSI reporting.
  • the UE shall report a CSI report only after receiving at least one CSI-RS transmission occasion for each of the CSI-RS resources in the corresponding CSI-RS resource set for channel measurement and one CSI-RS/CSI-IM occasion for the CSI-RS/CSI-IM resources in the corresponding resource set for interference measurement, not later than the CSI reference resource, and within the same DRX active time if DRX is configured. Otherwise, the UE shall drop the report.
  • the UE transmits at least one aperiodic CSI-RS transmission occasion for each of multiple CSI-RS resources in the corresponding CSI-RS resource set for channel measurement when the UE is not later than the CSI reference resource and within the same DRX active time if DRX is configured, or A UE reports a CSI report only if it receives p consecutive periodic or semi-persistent multiple CSI-RS transmission occasions and one CSI-RS/CSI-IM occasion for the CSI-RS/CSI-IM resources in the corresponding resource set for interference measurement. Otherwise, the UE drops the report.
  • K p ⁇ ⁇ 1, 2, 4 ⁇ is indicated by the UE capabilities.
  • the UE reports a CSI report only if the UE has received at least one CSI-RS transmission occasion for each CSI-RS resource in the K TRS CSI-RS resource sets of the corresponding CSI-RS resource setting for channel measurement when it is not later than the CSI reference resource and within the same DRX active time if DRX is configured. Otherwise, the UE drops the report.
  • the UE will report a CSI report only if it receives at least one CSI-RS transmission occasion for channel measurement and one CSI-RS/CSI-IM occasion for interference measurement not later than the CSI reference resource and within the DRX active time. Otherwise, the UE will drop the report.
  • the UE For a CSI reporting configuration in CSI-ReportConfig associated with the higher layer parameter reportQuantity having at least 'RI' on a serving cell where cell DTX is activated, the UE shall report a CSI report only if the UE receives at least one CSI-RS transmission occasion for each periodic CSI-RS resource or each semi-persistent CSI-RS resource for channel measurement/interference measurement not later than the CSI reference resource and within the active period of cell DTX. Otherwise, the UE shall drop the CSI report.
  • multiple UE behaviors are defined for multiple values of at least one of the settings: report/resource configuration method, codebook type, and report quantity (reportQuantity).
  • the UE assumes that the corresponding PDSCH signals transmitted on antenna ports [3000,...,3000+P+1] have a ratio of EPRE to CSI-RS EPRE equal to the ratio given by powerControlOffset.
  • the UE When the CSI request field on the DCI triggers a CSI report on the PUSCH, the UE provides a valid CSI report for the n-th triggered report if the following condition holds: the first uplink symbol carrying the corresponding CSI report(s) and including the effect of the timing advance does not start earlier than symbol Z ref (it starts after symbol Z ref ); and The first uplink symbol carrying the nth CSI report and including the effect of the timing advance does not start earlier than symbol Z' ref (n) (it starts after symbol Z' ref (n)).
  • T switch is defined in the specification and applies only if Z 1 applies.
  • a PDCCH reception includes two corresponding PDCCH candidates from two search space sets
  • the PDCCH candidate that ends later in time is used to determine the last symbol of the PDCCH that triggers a CSI report.
  • (Z(m),Z'(m)) corresponds to the mth updated CSI report and is defined as follows: where CSI computation delay requirement 1 denotes ( Z1 , Z'1 ) [symbols] for ⁇ 0,1,2,3 ⁇ , and CSI computation delay requirement 2 denotes ( Z1 , Z'1 ), ( Z2 , Z'2 ), ( Z3 , Z'3 ) [symbols] for ⁇ 0,1,2,3,4,5,6 ⁇ .
  • the CSI to be transmitted is a single CSI, corresponds to wideband frequency granularity, the CSI corresponds to a maximum of four CSI-RS ports in a single resource without CRI reporting, and CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI', and the CSI is triggered without a PUSCH with a transport block or HARQ-ACK or both, then (Z(m),Z'(m)) are defined as (Z 1 ,Z' 1 ) in CSI calculation delay requirement 1.
  • the CSI to be transmitted corresponds to wideband frequency granularity
  • the CSI corresponds to up to four CSI-RS ports in a single resource without CRI reporting
  • CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI'
  • (Z(m),Z'(m)) is defined as (Z 1 ,Z' 1 ) in CSI calculation delay requirement 2.
  • CSI to be transmitted corresponds to wideband frequency granularity and reportQuantity is set to 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR-Index', or 'cri-SINR-Index', then (Z(m), Z'(m)) is defined as (Z 1 , Z' 1 ) in CSI calculation delay requirement 2.
  • reportQuantity is set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP-Index' or 'ssb-Index-RSRP-Index' and X ⁇ is the capability reported by the UE KB l is the capability reported by the UE according to beamReportTiming According to beamSwitchTiming, (Z(m), Z'(m)) is defined as (Z 3 , Z' 3 ) in CSI calculation delay requirement 2.
  • (Z(m),Z'(m)) is defined as ( Z2 +w, Z'2 ) according to the capabilities reported by the UE, using ( Z2 , Z'2 ) in CSI computation delay requirement 2. It is defined as ( Z2 +14(K-1)m,Z'2) or ( Z2 +14(K- 1 )m+r, Z'2 +r) according to the capabilities reported by the UE.
  • ⁇ in CSI computation delay requirements 1 and 2 corresponds to min( ⁇ PDCCH , ⁇ CSI-RS , ⁇ UL ), where ⁇ PDCCH corresponds to the subcarrier spacing of the PDCCH on which the DCI is transmitted, ⁇ UL corresponds to the subcarrier spacing of the PUSCH on which the CSI report will be transmitted, and ⁇ CSI-RS corresponds to the minimum subcarrier spacing of the A-CSI-RS triggered by the DCI.
  • the CJT is not limited to an ideal environment with no delay/Doppler/phase difference between TRPs, but is also considered to be applicable to a non-ideal environment (non-ideal backhaul) with delay/Doppler/phase difference between TRPs.
  • a mechanism e.g., UE assisted calibration
  • the UE measures the delay/Doppler/phase differences (e.g., offset) between TRPs and reports them to the base station.
  • the delay/Doppler/phase differences may differ.
  • offset differences may be a factor affecting the performance of a CJT using multiple TRPs.
  • OTA over-the-air
  • Figure 1 is a conceptual diagram showing an example of a UE performing DL reception from multiple TRPs.
  • the UE may receive up to four DL-RSs (e.g., TRSs) from each of up to four CJT-TRPs (multiple TRPs #1 to #4 that support CJT).
  • the UE may then report the time misalignment (delay), frequency offset (Doppler shift/offset), and phase offset (phase difference) between the TRPs to the network.
  • Issue 1 Specific content of DL-RS (TRS) resources.
  • ⁇ Assignment 2 Details of the report.
  • ⁇ Task 3 Details of the report (especially its correspondence with CJT).
  • the inventors therefore studied methods for UE-assisted calibration for multi-TRP and came up with one aspect of this embodiment.
  • a word enclosed in "( )" in a sentence may indicate an explanation of the word immediately preceding it (for example, an explanation of spelling), a paraphrase, a specific example, a supplementary explanation, etc.
  • a word enclosed in "[ ]" in a sentence may be interpreted including the word in the meaning of the entire sentence, or may be interpreted excluding the word in the meaning of the entire sentence (ignoring the word in the meaning of the entire sentence). Note that "( )" and "[ ]” may also be used for purposes/meanings other than those mentioned above.
  • A/B and “at least one of A and B” may be interpreted interchangeably. Also, in this disclosure, “A/B/C” may mean “at least one of A, B, and C.”
  • Radio Resource Control RRC
  • RRC parameters RRC parameters
  • RRC messages upper layer parameters, fields, information elements (IEs), settings, etc.
  • IEs information elements
  • CEs Medium Access Control control elements
  • update commands activation/deactivation commands, etc.
  • MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc.
  • Broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI Other System Information
  • physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • ceil(x), ceiling function, and ceiling function may be interchangeable.
  • floor(x), floor function, and floor function may be interchangeable.
  • sqrt(x), square root of x, and root x may be interchangeable.
  • x mod y, mod(x, y), mod function, and modulo operation may be interchangeable.
  • ⁇ i M M+N-1 f(i)
  • C(n, k) is the number of combinations of selecting k values from n values (combinatorial coefficient), binomial coefficients, nCk and Cnk may be read as interchangeable.
  • x/y and floor(x/ y ) may be read as interchangeable.
  • a b , A_b, Ab, and A with a b added to the lower right may be read as interchangeable.
  • a c , A ⁇ c, and A with a c added to the upper right may be read as interchangeable.
  • a b c , A_b ⁇ c, and A with a b added to the lower right and a c added to the upper right may be read as interchangeable.
  • x ⁇ may be represented by adding ⁇ above x, or may be referred to as x tilde.
  • x - may be represented by adding - above x, or may be referred to as x bar.
  • x ⁇ may be represented by adding ⁇ above x, or may be referred to as x hat.
  • ⁇ FDM frequency division multiplexing
  • TDM time division multiplexing
  • cell group serving cell group, master cell group (MCG), and secondary cell group (SCG) may be interchangeable.
  • L1/L2, L1/L2 signaling, and DCI/MAC CE may be interchangeable.
  • a serving cell may be replaced with a cell that transmits a PDSCH.
  • a candidate cell may refer to a cell that is a candidate to become a serving cell through L1/L2 inter-cell mobility.
  • cell, PCI, serving cell, source serving cell, source cell, CC, BWP, BWP within CC, and band may be interchangeable.
  • cell, PCI, cell with additional PCI, additional cell, other cell, non-serving cell, cell with a different PCI, candidate cell, candidate serving cell, cell with a PCI different from the PCI of the current serving cell, another serving cell, and target cell may be interchangeable.
  • switch, change, and update may be interchangeable.
  • Serving cell may be interchangeable with the serving cell before the switch or the serving cell after the switch.
  • the terms TRP, CMR, NZP CSI-RS resource, NZP CSI-RS resource set, group of multiple NZP CSI-RS resources (multiple NZP CSI-RS resources), group of multiple NZP CSI-RS resource sets (multiple NZP CSI-RS resource sets), panel, group, set, CRI, resource, CSI-RS, TRS, and NZP CSI-RS resource set with TRS information (TRS-Info) may be interpreted interchangeably.
  • the terms CMR group/set, NZP CSI-RS resource group/set, and CRI group/set may be interpreted interchangeably.
  • one NZP-CSI-RS resource may correspond to a certain TRP. That is, the NZP-CSI-RS resource and the TRP may be associated with each other.
  • DL-RS resources NZP-CSI-RS resources, TRS resources, resources, and RS resources may be interpreted interchangeably.
  • per resource per resource unit, per TRP, and per TRP unit may be interpreted interchangeably.
  • resource and resource set may be interpreted interchangeably.
  • frequency, Doppler shift, and Doppler may be read interchangeably.
  • UE-assisted CJT calibration, CJT calibration, CSI reporting for CJT calibration, CJT CSI, and CJT CSI reporting may be read interchangeably.
  • the scenario to which the UE reporting of the present disclosure is applied may be both the non-ideal synchronization (A) and backhaul (B) described above, or may be only non-ideal synchronization (A) or only non-ideal backhaul (B).
  • the application scenarios (A/B) of the UE reporting of the present disclosure may differ for each embodiment/option described below.
  • Embodiment A relates to UE-assisted calibration for multi-TRP based on TDCP reports.
  • Embodiment A1 DL-RS resources for UE reporting.
  • Embodiment A2 Report details.
  • Embodiment A3 Report details (correspondence with CJT).
  • embodiments A1 to A3 will be described.
  • Embodiment A1 addresses problem 1 and relates to DL-RS resources for UE reporting.
  • Embodiment A1 describes UE reporting enhancements for CJT/DL-multi-TRP deployments with non-ideal synchronization and backhaul.
  • Embodiment A1 can be further classified as follows.
  • Embodiment A1-1 Correspondence with TRS settings.
  • -Embodiment A1-2 Number of NZP-CSI-RS resource sets.
  • -Embodiment A1-3 Number of NZP-CSI-RS resources.
  • Embodiment A1-4 Resource allocation of NZP-CSI-RS resources.
  • Embodiment A1-5 Restrictions on NZP-CSI-RS resources.
  • the number of NZP-CSI-RS resource sets per CSI report may be up to X, where X may be determined according to at least one of the following suggestions.
  • ⁇ Proposal 1-2-1 Fixed integer values (e.g., 1, 2, 3, 4, etc.).
  • Proposal 1-2-2 Integer value set by higher layer signaling (RRC) (candidate values are at least one of ⁇ 1, 2, 3, 4 ⁇ ).
  • Proposal 1-2-3 Integer value indicated by higher layer signaling (MAC CE)/physical layer signaling (DCI) (candidate values are at least one of ⁇ 1, 2, 3, 4 ⁇ ).
  • Proposal 1-2-4 The number of NZP-CSI-RS resource sets may be implicitly determined by other settings/instructions mentioned above.
  • X may depend on the number of CSI-RS resources for CJT CSI. Note that for CJT CSI in Rel. 18, the number of CSI-RS resources may correspond to (or be the same as) the number of TRPs for CJT CSI reporting.
  • embodiment A1-2 it is possible to measure a sufficient number of DL-RSs to measure the time misalignment (delay), frequency offset (Doppler shift/offset), and phase offset (phase difference) between TRPs.
  • FIGS. 1 to A4 NZP-CSI-RS resource allocation will be described.
  • Figures 2 to 6 are diagrams illustrating an example of resource allocation according to embodiments A1 to A4.
  • Resource allocation for NZP-CSI-RS resources may follow at least one of the following options 1 to 3:
  • the NW may control resource allocation based on at least one of the following options 1 to 3.
  • the UE may control the transmission and reception of channels/signals assuming resources allocated based on at least one of the following options 1 to 3.
  • the NZP-CSI-RS resource may be allocated to a different OFDM symbol for each resource (TRP). That is, multiple NZP-CSI-RS resources may be time-division multiplexed. As shown in Figure 2, the NZP-CSI-RS resources for each TRP (TRP #1 to #4) may be time-division multiplexed while overlapping in the frequency direction.
  • Option 1 may be applied to intra-site CJT scenarios (e.g., where the CJT TRP is co-located) and inter-site CJT scenarios (e.g., where the CJT TRP is not co-located).
  • Option 2 allows the time domain for all allocated NZP-CSI-RS resources to be small (e.g., one OFDM symbol is sufficient).
  • Option 2 may be applied in intra-site CJT scenarios (e.g., when the CJT TRP is co-located).
  • Option 1 and Option 2 may be applied in appropriate combination to form Option 3.
  • subsets may be formed by one or more NZP-CSI-RS resources, and TDM may be performed on a subset-by-subset basis.
  • multiple NZP-CSI-RS resources included in one subset may be allocated by FDM in the same OFDM symbol.
  • multiple NZP-CSI-RS resources included in another subset may be allocated by FDM in another OFDM symbol.
  • NZP-CSI-RS resources in the same subset may be FDM-split, and multiple subsets in different OFDM symbols may be TDM-split.
  • the NZP-CSI-RS resources of TRP #1 and TRP #3 may be FDM-multiplexed with respect to each other
  • the NZP-CSI-RS resources of TRP #2 and TRP #4 may be FDM-multiplexed with respect to each other
  • subset #1 and subset #2 may be TDM-multiplexed.
  • the NZP-CSI-RS resources of each of TRP #1 to TRP #3 may be FDM-multiplexed with respect to each other.
  • subset #1 and subset #2 may be TDM-multiplexed.
  • TRPs that are FDM-multiplexed may be determined based on the distance between the TRPs. For example, TRPs that are relatively close to each other may be included in the same subset, and TRPs that are relatively far apart may be divided into different subsets.
  • Option 3 may be applied to intra-site CJT scenarios (e.g., where the CJT TRP is co-located) and inter-site CJT scenarios (e.g., where the CJT TRP is not co-located).
  • NZP-CSI-RS resources (NZP-CSI-RS resources in the same subset) allocated to the same OFDM symbol may be restricted to be transmitted from co-located TRPs (TRPs in the same or relatively close locations).
  • TRPs in the same or relatively close locations co-located TRPs (TRPs in the same or relatively close locations).
  • one TCI state may be associated with one subset.
  • the network can appropriately control the allocation of multiple NZP-CSI-RS resources on a TRP basis.
  • the UE can appropriately control the transmission and reception of channels/signals in accordance with this allocation.
  • Emodiment A1-5 In embodiments A1-5, restrictions (constraints) on NZP-CSI-RS resources will be described.
  • the NW may control resource allocation based on at least one of the restrictions listed below.
  • the UE may control transmission and reception of channels/signals by applying at least one of the restrictions listed below to the allocated resources.
  • NZP-CSI-RS resources at least one of the following optional restrictions may be applied: (Opt1): For all (periodic) NZP-CSI-RS resources, the periodicity may be the same. (Opt2): For all NZP-CSI-RS resources, the bandwidth may be the same. (Opt3): For all NZP-CSI-RS resources, the frequency (subcarrier) location may be the same. (Opt4): For all NZP-CSI-RS resources, the power control offset (i.e., the power offset between the PDSCH resource and the NZP-CSI-RS resource) may be the same.
  • the power control offset i.e., the power offset between the PDSCH resource and the NZP-CSI-RS resource
  • the power control offset (powerControlOffsetSS, i.e., the power offset between NZP-CSI-RS resources and SSS resources) may be the same.
  • the antenna ports may be the same.
  • the resource position (time (symbol) position) may be the same.
  • the QCL information (specific QCL type: for example, type D) may be the same. The specific QCL type is not limited to this and may be another QCL type.
  • At least one of the following optional restrictions may be applied to the NZP-CSI-RS resources:
  • (Opt1): QCL information (e.g., QCL source RS) may be different among multiple NZP-CSI-RS resources. This option may only be applied to resources used by non-collocated TRPs. That is, the same QCL information may be applied to resources from collocated TRPs.
  • the same QCL type e.g., QCL type A/C
  • a different QCL type e.g., QCL type D
  • Embodiments A1-5 are applicable to allocation (TDM/FDM) between resource sets within a single resource set or across multiple different resource sets.
  • the network can appropriately control the allocation of multiple NZP-CSI-RS resources based on specific restrictions.
  • the UE can appropriately control the transmission and reception of channels/signals in accordance with these restrictions (allocations).
  • Embodiment A2 addresses problem 2 and relates to details of the report.
  • Embodiment A2 can be further classified into embodiments A2-1 to A2-4.
  • the UE may report at least one of the following metrics: (Opt1): Time domain correlation between multiple RSs (transmitted from different TRPs). In this option, amplitude/phase may be defined (Opt1-1). (Opt2): Timing difference between multiple RSs (transmitted from different TRPs). (Opt3): Doppler offset/frequency offset between multiple RSs (transmitted from different TRPs). (Opt4): Phase offset between multiple RSs (transmitted from different TRPs). (Opt5): Number of TRPs corresponding to the report. (Opt6): Selection of TRPs corresponding to the CSI report (e.g., a bitmap indicating the corresponding TRPs).
  • the UE may be required to report (X-1) correlations/differences/offsets.
  • the TRPs selected for reporting must also be reported by the UE.
  • the report contents (metrics to be reported) shown in the above-described embodiment A2-1 may be selected based on at least one of the following: That is, the UE may determine the report contents based on at least one of the following: (Opt1): Higher layer signaling (RRC). (Opt2): Higher layer signaling (DL MAC CE). (Opt3): Physical layer signaling (DCI). (Opt4): Not set (i.e., predefined by specifications) For example, at least one of the multiple options in embodiment A2-1 may be predefined. (Opt5): Physical layer signaling (UCI). (Opt6): Reported by UL RRC (e.g., UE assisted).
  • Options 5 to 7 may be included in the UE reports, capability reports, etc. of this disclosure.
  • the number of bits for the metric report described above may be determined based on at least one of the following: (Opt1): 4 bits. For example, this can be applied as a form of reporting quantized values in Options 1 to 4 of embodiment A2-1. In another example, this can be applied as a form of bitmap for CJT TRP in Option 5 of embodiment A2-1. (Opt2): A bit number greater than 4. For example, this is applicable to options 1 to 4 of embodiment A2-1. (Opt3): A number of bits less than 4. For example, this can be applied to reporting relatively coarse quantization values in Options 1 to 4 of embodiment A2-1. In another example, this can be applied to selecting a TRP from a subset of CJT TRPs in Option 5 of embodiment A2-1.
  • FIGS. 6A and 6B are diagrams illustrating an example of a correspondence relationship (metric report mapping) between report contents (CSI fields) and the number of bits according to embodiment A2.
  • one CSI report may include CSI fields for (indicating) the time domain correlation between multiple RSs transmitted from TRP#1 and TRP#2, the time domain correlation between multiple RSs transmitted from TRP#1 and TRP#3, and the time domain correlation between multiple RSs transmitted from TRP#1 and TRP#4.
  • Each CSI field may consist of, for example, 4 bits.
  • CSI Part 1 may include a CSI field for (indicating) the number of TRPs.
  • CSI Part 2 may also include CSI fields for (indicating) the time domain correlation between multiple RSs transmitted from TRP #1 and TRP #2, the time domain correlation between multiple RSs transmitted from TRP #1 and TRP #3, and the time domain correlation between multiple RSs transmitted from TRP #1 and TRP #4.
  • Each CSI field may consist of, for example, 4 bits.
  • (Opt2'') Coefficient associated with the number of NZP-CSI-RS resources per TRP.
  • (Opt3) A coefficient associated with the number of NZP-CSI-RS resource sets.
  • (Opt3') Coefficient associated with the number of NZP-CSI-RS resource sets per TRP.
  • N TRP denotes the number of TRPs
  • X is a value determined based on UE capabilities.
  • O CPU N resources *N TRP *X
  • N resources is the number of NZP-CSI-RS resources per TRP.
  • the UE may determine whether to apply either of the above options 1 or 2 based on the number of TRPs. For example, the UE may apply option 1 if the number of TRPs is 1, and apply option 2 if the number of TRPs is greater than 1.
  • Embodiment B considers some of the following: ⁇ Consideration B1: Depending on the purpose (accurate reporting amount, accurate delay offset, accurate frequency/phase offset), the appropriate CSI-RS resource may differ.
  • Embodiment B1 may be based on at least one of the following options:
  • ⁇ Option 2 The details of the CMR configuration in the time domain may be based on at least one of the following several options 2-x.
  • - ⁇ Option 2-1 One symbol CMR per TRP.
  • - ⁇ Option 2-1a One CSI-RS resource per TRP.
  • - ⁇ Option 2-2 CMR of X (>1) symbols per TRP. The X symbols may be consecutive or non-consecutive.
  • - ⁇ Option 2-2a More than one CSI-RS resource per TRP. The more than one CSI-RS resource may be contiguous or discontinuous in the time domain.
  • - ⁇ Option 2-3 CMR placed in multiple consecutive OFDM symbols.
  • ⁇ Option 4 The details of the CMR configuration in the spatial domain may be based on at least one of several options 4-x below.
  • - Option 4-1 Only one port is set for any CMR among multiple CMRs.
  • - ⁇ Option 4-2 The number of CSI-RS ports for any CMR among multiple CMRs is greater than one.
  • - ⁇ Option 4-3 The same number of CSI-RS ports are configured among multiple CSI-RS resources (e.g., all CSI-RS resources).
  • This option may be based on at least one of the following features: - ⁇ Separate report quantity (reportQuantity) values are defined for delay/frequency/phase offsets, which may be, for example, a value indicating a delay offset (dOffset), a value indicating a frequency offset (fOffset), or a value indicating a phase offset (pOffset). - A separate CSI reporting configuration may be configured for each value of reportQuantity. Different CMR sets may be configured for different values of reportQuantity. -- ⁇ This option allows multiple amounts of delay/frequency/phase offset to be set simultaneously.
  • Constraints may be defined for the usage of time resources for which (including) a CMR for UE-assisted CJT calibration is configured. According to embodiment B2, the complexity of the measurement/calculation implementation in the UE is reduced for extended CSI reporting for CJT calibration.
  • One or more report contents (report amounts) for extended CSI reporting for CJT calibration may be defined. According to embodiment B3, appropriate report contents can be reported depending on a scenario, etc., and a trade-off between report contents and reporting overhead can be appropriately considered.
  • Embodiment B3 may be based on at least one of the following options:
  • - ⁇ Options 1-6 Selection of TRPs corresponding to CSI reports (e.g., bitmap indicating corresponding TRPs).
  • - ⁇ Option 1-7 One or more TRPs selected from multiple TRPs that are available/suitable/unavailable for CJT (TRP selection).Whether a TRP is available/suitable for CJT may be determined based on Options 1-4 of embodiment B1.
  • Option 2 Reports of one or more report contents in Option 1 may be processed by at least one of several options 2-x below.
  • - Option 2-1 A CSI report carries up to one of one or more report contents. Multiple report contents do not need to be multiplexed in a single CSI report.
  • - ⁇ Option 2-2 A CSI report carries up to X report contents out of one or more report contents. Multiple report contents may be multiplexed in a single CSI report.
  • Combinations of the X report contents may be restricted. For example, the combinations may be restricted to combinations of delay/frequency/phase offsets, or to combinations of TRP selection and delay offset for CJT.
  • ⁇ Option 3 The type/number of report contents reported in the CSI report for CJT calibration may be determined based on at least one of the following several options 3-x.
  • - Option 3-1 The type/number of report contents is based on signaling from the NW. The signaling may be based on the supplementary information (notification of information to the UE) described later. This option may be based on at least one of the following examples: -- ⁇ Example 1: The RRC IE configures one or more report contents in the CSI report. -- ⁇ Example 2: The RRC IE configures more than one reporting content in the CSI report. At least one of the DL MAC CE and the DCI may indicate one or more of the configured reporting contents to be actually reported/activated in the report.
  • the UE determines the type/number of report contents based on the results of measurements/calculations. This option may be based on at least one of the following examples: -- ⁇ Example 1: If the indicator (delay/frequency/phase offset) for one of the CMRs is greater than (out of) the threshold, the UE reports only the TRP selection regarding which TRP is (is not) available/suitable for CJT. Otherwise (if the indicators for all CMRs are less than/within the threshold), the UE may report indicators for each of the corresponding TRPs. -- ⁇ Example 2: The conditions for determining the type/number of report contents may not be defined in the specification. For example, Example 1 may depend on the UE implementation.
  • ⁇ Option 4 (Especially for Option 3-2) The way in which the UE notifies the gNB/NW of the actual (exact) reporting content may be based on at least one of the following options 4-x.
  • - ⁇ Option 4-1 The type of report content to be reported may be signaled by an X bit (eg, 1 bit) in the CSI report for CJT calibration.
  • - Option 4-2 Reporting resources are configured for each type of report content. The UE may select which resources are used. The resources may imply which types of report content are reported.
  • the UCI payload size may be based on at least one of the following options: - Option 1: A specific size is determined before measurement/reporting. The actual (exact) payload size may be smaller than the determined specific size. Unused bits may be reserved bits, ignored, or filled with zeros (padded). - Option 2: The UE determines the actual (exact) payload size for each report. A fixed payload may be determined for part of the report (e.g., bits for selecting the report content). This ensures that there is no ambiguity between the gNB and the UE and that a variable payload size is determined for each report. Decoupling of CSI Part 1 and CSI Part 2 may also be applied.
  • a rule/signaling/instruction may be introduced to determine whether the UE assumes that the gNB has performed pre-compensation for delay/frequency/phase offsets (based on the reports).
  • the UE can properly receive the CJT based on the CJT calibration.
  • Embodiment B4 may be based on at least one of the following examples:
  • Example rule If the UE is configured to report delay/frequency/phase offsets, when the UE receives a CJT PDSCH, the UE may always assume that pre-compensation has been performed on the PDSCH. During the time window after each report (until a specific time has elapsed since each report), the UE may assume that pre-compensation has been performed on the PDSCH.
  • the time window length/specific time may be X frames/subframes/slots/symbols/milliseconds (msec). The time window length/specific time/X may depend on the UE capabilities (or may be reported by the UE as UE capabilities).
  • the network may configure multiple CMRs from multiple TRPs and use a new parameter to indicate whether pre-compensation has been performed for the multiple CMRs.
  • a new bit may be added to indicate whether pre-compensation has been performed for the CJT PDSCH.
  • the CMR may be a CSI-RS that is not precoded/beamformed, a UE-specific CSI-RS, or a CSI-RS other than the CSI-RS used for CJT calibration. Applying pre-compensation to the CSI-RS can reduce the processing load on the UE.
  • Embodiment B5 When embodiment B4 is applied, applicability/constraints/conditions of assumptions/rules/signaling/instructions of embodiment B4 (pre-compensation) may be defined. According to embodiment B5, the UE can properly receive the CJT based on the CJT calibration.
  • ⁇ CSI-RS for UE-assisted CJT calibration.
  • ⁇ CSI-RS for CJT CSI (measurement).
  • ⁇ CSI report for CJT CSI (report).
  • ⁇ PDSCH from multiple TRPs.
  • the constraints/conditions in the time domain may be based on at least one of the following examples: ⁇ Example 1: The constraint is that the time from the CSI report for UE-assisted CJT calibration (or the CSI report for CJT CSI) to the PDSCH to which pre-compensation is applied (CJT PDSCH from multiple TRPs) is less than a specific time (threshold) ( Figure 8A), or that the PDSCH from multiple TRPs is within the time window from the CSI report for UE-assisted CJT calibration (or the CSI report for CJT CSI).
  • Example 2 The constraint is that the time from the CSI report for UE-assisted CJT calibration (or the CSI report for CJT CSI) to the CSI-RS to which pre-compensation is applied (CJT CSI-RS from multiple TRPs) is less than or equal to a specific time (threshold) (FIG. 8B), or that PDSCHs from multiple TRPs are present within a time window from the CSI report for UE-assisted CJT calibration (or the CSI report for CJT CSI).
  • the specific time may be X frames/subframes/slots/symbols/msec.
  • the time window length/specific time/threshold may be X frames/subframes/slots/symbols/msec.
  • the time window length/specific time/X may depend on the UE capabilities (may be reported by the UE as UE capabilities).
  • pre-compensation may be applied to that PDSCH, or the UE may expect/assume that pre-compensation has been applied to that PDSCH.
  • pre-compensation may be applied to that CSI-RS, or the UE may expect/assume that pre-compensation has been applied to that CSI-RS.
  • the constraint in the time domain may be at least one of the following constraints: ⁇ Whether two or more time resources are within the same DRX period (UE DRX period). For example, the constraint is that CSI reports for UE-assisted calibration and PDSCH from multiple TRPs are within the same UE DRX period. ⁇ Whether two or more time resources are within the same DTX period (cell DTX period). For example, the constraint is that CSI reporting for UE-assisted calibration and PDSCH from multiple TRPs are within the same cell DTX period.
  • notification of any information to the UE in the above-described embodiments may be performed periodically, semi-persistently, or aperiodically.
  • the method of notifying (signaling) any information [from the NW] to the UE may be based on at least one of the following methods:
  • the signaling is RRC configuration.
  • the RRC configuration may be individual RRC parameters for the corresponding function, or an interpretation of RRC parameters separate from the corresponding function.
  • Method 3 Signaling is a DCI indication. A timeline similar to that of Method 2 may be defined.
  • the UE/BS may follow the behavior specified in existing 3GPP releases.
  • an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • downlink, uplink, etc. may be expressed without adding the word "link.”
  • various channels may be expressed without adding "Physical" to the beginning.
  • the control unit 110 controls the entire base station 10.
  • the control unit 110 can be composed of a controller, a control circuit, etc., as described based on common understanding in the technical field to which this disclosure pertains.
  • the transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123.
  • the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
  • the transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field to which this disclosure relates.
  • the transceiver unit 120 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit.
  • the transmitter unit may be composed of a transmission processing unit 1211 and an RF unit 122.
  • the receiver unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
  • the transmitting and receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
  • the transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
  • the transceiver 120 may also receive the above-mentioned uplink channel, uplink reference signal, etc.
  • the transceiver 120 may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control e.g., HARQ retransmission control
  • the transmitter/receiver unit 120 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • channel coding which may include error correction coding
  • DFT Discrete Fourier Transform
  • IFFT Inverse Fast Fourier Transform
  • the transceiver unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.
  • the transceiver unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.
  • the transceiver unit 120 may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.
  • reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc.
  • FFT Fast Fourier Transform
  • IDFT Inverse Discrete Fourier Transform
  • the transceiver 120 may perform measurements on the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal.
  • the measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc.
  • RSRP Reference Signal Received Power
  • RSSI Received Signal Strength Indicator
  • the measurement results may be output to the control unit 110.
  • the transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
  • devices included in the core network 30 e.g., network nodes providing NF
  • other base stations 10, etc. may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
  • the transmitter and receiver of the base station 10 in this disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
  • the base station 10 may be separated into three elements: a radio unit (RU), a distributed unit (DU), and a central unit (CU).
  • the RU may perform RF processing (digital beamforming, digital-to-analog conversion, analog beamforming, etc.) and lower-level physical layer functions (precoding, IFFT, FFT, etc.).
  • the DU may perform higher-level physical layer functions (encoding to resource element mapping, etc.), MAC layer functions, and RLC layer functions.
  • the CU may perform PDCP layer, Service Data Adaptation Protocol (SDAP) layer, and RRC layer functions.
  • SDAP Service Data Adaptation Protocol
  • the base station 10 may include a single device that implements all of the functions of the RU, DU, and CU, or may include multiple devices that each implement some of the functions of the RU, DU, and CU and are connected to each other.
  • the base station 10 may be interchangeably referred to as the RU/DU/CU.
  • the transceiver unit 120 may transmit a configuration of multiple channel measurement resources corresponding to multiple transmission/reception points (TRPs), respectively, and a configuration of one or more reporting quantities.
  • the control unit 110 may control the reception of reports including values of the one or more reporting quantities.
  • the one or more reporting quantities may be one or more of the following: a delay offset between the multiple channel measurement resources, a frequency offset between the multiple channel measurement resources, a phase offset between the multiple channel measurement resources, and one or more TRPs selected from the multiple TRPs.
  • the transceiver unit 120 may transmit a configuration for reporting measurements between a plurality of channel measurement resources based on a plurality of channel measurement resources corresponding to a plurality of transmission/reception points (TRPs).
  • the control unit 110 may determine, based on at least one of the configuration and downlink control information, whether to apply pre-compensation based on the report to the physical downlink shared channel and at least one of the plurality of channel measurement resources.
  • the user terminal 20 is a diagram showing an example of the configuration of a user terminal according to one embodiment.
  • the user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transceiver unit 220, and the transceiver antenna 230.
  • this example mainly shows the functional blocks that characterize the present embodiment, and the user terminal 20 may also have other functional blocks necessary for wireless communication. Some of the processing of each unit described below may be omitted.
  • the control unit 210 controls the entire user terminal 20.
  • the control unit 210 can be composed of a controller, control circuit, etc., as described based on common understanding in the technical field to which this disclosure pertains.
  • the control unit 210 may 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 generate data, control information, sequences, etc. to be transmitted as signals and transfer them to the transmission and reception unit 220.
  • the transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223.
  • the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
  • the transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to this disclosure.
  • the transceiver unit 220 may be configured as an integrated transceiver unit, or may be composed of a transmitter unit and a receiver unit.
  • the transmitter unit may be composed of a transmission processing unit 2211 and an RF unit 222.
  • the receiver unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
  • the transmitting and receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
  • the transceiver unit 220 may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted.
  • RLC layer processing e.g., RLC retransmission control
  • MAC layer processing e.g., HARQ retransmission control
  • the transceiver unit 220 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
  • Whether or not to apply DFT processing may be based on the settings for transform precoding. If transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the transmission processing to transmit the channel using a DFT-s-OFDM waveform; if not, it may not be necessary to perform DFT processing as the transmission processing.
  • transform precoding is enabled for a certain channel (e.g., PUSCH)
  • the transceiver unit 220 transmission processing unit 2211
  • the transceiver unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.
  • the transceiver unit 220 may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
  • reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
  • the transceiver unit 220 may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal.
  • the measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc.
  • the measurement results may be output to the control unit 210.
  • the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources.
  • the channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources.
  • the measurement unit 223 may also derive interference measurements for CSI calculation based on interference measurement resources.
  • the interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc.
  • CSI-IM may also be referred to as CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS.
  • CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be interchangeable.
  • the transceiver unit 220 may receive a configuration of multiple channel measurement resources corresponding to multiple transmission/reception points (TRPs), respectively, and a configuration of one or more reporting quantities (e.g., CSI reporting configuration).
  • the control unit 210 may control the transmission of a report (e.g., a CSI report for UE-assisted CJT calibration) including values of the one or more reporting quantities.
  • the one or more reporting quantities may be one or more of the delay offset between the multiple channel measurement resources, the frequency offset between the multiple channel measurement resources, the phase offset between the multiple channel measurement resources, and one or more TRPs selected from the multiple TRPs.
  • the control unit 210 may determine whether each TRP is available for coherent joint transmission based on measurements of the multiple channel measurement resources, and the one or more reporting quantities may be based on this determination.
  • the transceiver unit 220 may receive a configuration (e.g., a CSI reporting configuration) for reporting measurements between a plurality of channel measurement resources based on a plurality of channel measurement resources corresponding to a plurality of transmission/reception points (TRPs), respectively.
  • the control unit 210 may determine, based on at least one of the configuration and downlink control information, whether pre-compensation based on the report is to be applied to the physical downlink shared channel and at least one of the plurality of channel measurement resources.
  • the pre-compensation may be applied to the CSI-RS.
  • the pre-compensation may be applied to the physical downlink shared channel.
  • each functional block may be realized using a single device that is physically or logically coupled, or may be realized using two or more physically or logically separated devices that are directly or indirectly connected (e.g., wired, wireless, etc.) and these multiple devices.
  • the functional block may also be realized by combining software with the single device or multiple devices.
  • functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
  • a functional block (component) that performs transmission functions may be called a transmitting unit, transmitter, etc.
  • transmitting unit transmitter
  • a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • Figure 12 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.
  • the above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, memory 1002, storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
  • the hardware configuration of the base station 10 and user terminal 20 may be configured to include one or more of the devices shown in the figures, or may be configured to exclude some of the devices.
  • processor 1001 may be implemented by one or more chips.
  • the functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of reading and writing data from and to the memory 1002 and storage 1003.
  • the processor 1001 for example, runs an operating system to control the entire computer.
  • the processor 1001 may be configured as a central processing unit (CPU) that includes an interface with peripheral devices, a control unit, an arithmetic unit, registers, etc.
  • CPU central processing unit
  • control unit e.g., arithmetic unit
  • registers e.g., arithmetic unit
  • at least a portion of the above-mentioned control unit 110 (210), transceiver unit 120 (220), etc. may be realized by the processor 1001.
  • the processor 1001 reads programs (program code), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes in accordance with these.
  • the programs used are those that cause a computer to execute at least some of the operations described in the above-described embodiments.
  • the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be used for other functional blocks.
  • Memory 1002 is a computer-readable recording medium and may be composed of, for example, at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium.
  • ROM Read Only Memory
  • EPROM Erasable Programmable ROM
  • EEPROM Electrically EPROM
  • RAM Random Access Memory
  • Memory 1002 may also be referred to as a register, cache, main memory, etc.
  • Memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
  • Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disc, a Blu-ray disc), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium.
  • Storage 1003 may also be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, or communication module.
  • the communication device 1004 may be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc. to implement at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the above-mentioned transmitter/receiver unit 120 (220), transmitter/receiver antenna 130 (230), etc. may be implemented by the communication device 1004.
  • the transmitter/receiver unit 120 (220) may be implemented as a transmitter unit 120a (220a) and a receiver unit 120b (220b) that are physically or logically separated.
  • the input device 1005 is an input device (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (e.g., a display, speaker, Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).
  • each device such as the processor 1001 and memory 1002, is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
  • the base station 10 and user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using this hardware.
  • the processor 1001 may be implemented using at least one of these pieces of hardware.
  • TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units.
  • radio resources such as the frequency bandwidth and transmission power that can be used by each user terminal
  • TTI is not limited to this.
  • the names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the mathematical formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
  • the various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.
  • the determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented as true or false, or a comparison of numerical values (for example, a comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, or Digital Subscriber Line (DSL)
  • wireless technology such as infrared or microwave
  • Network may refer to devices included in the network (e.g., base stations).
  • precoding "precoding weight”
  • QCL Quality of Co-Location
  • TCI state Transmission Configuration Indication state
  • spatialal relation "spatial domain filter,” “transmit power,” “phase rotation,” “antenna port,” “layer,” “number of layers,” “rank,” “resource,” “resource set,” “beam,” “beam width,” “beam angle,” “antenna,” “antenna element,” “panel,” “UE panel,” “transmitting entity,” “receiving entity,” etc.
  • the term "antenna port” may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port).
  • the term “resource” may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.).
  • the resource may include time/frequency/code/space/power resources.
  • the spatial domain transmit filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.
  • the above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.
  • CDM Code Division Multiplexing
  • RS Reference Signal
  • CORESET Control Resource Set
  • beam SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable terms.
  • index identifier
  • indicator indication
  • resource ID identifier
  • sequence list, set, group, cluster, and subset
  • Base Station BS
  • Radio Base Station Fire Base Station
  • NodeB 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”
  • Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
  • a base station can accommodate one or more (e.g., three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))).
  • RRH Remote Radio Head
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base station and base station subsystems that provide communication services within this coverage area.
  • a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on that information.
  • MS Mobile Station
  • UE User Equipment
  • a mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
  • At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a wireless communication device, etc.
  • at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
  • the mobile body in question refers to an object that can move at any speed, and of course also includes cases where the mobile body is stationary.
  • Examples of the mobile body in question include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these.
  • the mobile body in question may also be a mobile body that moves autonomously based on operation commands.
  • the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, a self-driving car, etc.), or a robot (manned or unmanned).
  • a vehicle e.g., a car, an airplane, etc.
  • an unmanned moving object e.g., a drone, a self-driving car, etc.
  • a robot manned or unmanned.
  • at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • FIG. 13 is a diagram showing an example of a vehicle according to one 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, an RPM 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.
  • various sensors including a current sensor 50, an RPM 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 including a communication module 60.
  • the drive unit 41 is composed of, for example, at least one of an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
  • the electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input/output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle.
  • the electronic control unit 49 may also be called an Electronic Control Unit (ECU).
  • ECU Electronic Control Unit
  • Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal for the front wheels 46/rear wheels 47 obtained by a rotation speed sensor 51, an air pressure signal for the front wheels 46/rear wheels 47 obtained by an air pressure sensor 52, a vehicle speed signal obtained by a vehicle speed sensor 53, an acceleration signal obtained by an acceleration sensor 54, a depression amount signal for the accelerator pedal 43 obtained by an accelerator pedal sensor 55, a depression amount signal for the brake pedal 44 obtained by a brake pedal sensor 56, an operation signal for the shift lever 45 obtained by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 58.
  • the information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, that provide (output) various information such as driving information, traffic information, and entertainment information, as well as one or more ECUs that control these devices.
  • the information service unit 59 uses information obtained from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.
  • various information/services e.g., multimedia information/multimedia services
  • the information service unit 59 may include input devices (e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.) that accept input from the outside, and may also include output devices (e.g., displays, speakers, LED lamps, touch panels, etc.) that output to the outside.
  • input devices e.g., keyboards, mice, microphones, switches, buttons, sensors, touch panels, etc.
  • output devices e.g., displays, speakers, LED lamps, touch panels, etc.
  • the driving assistance system unit 64 is composed of various devices that provide functions to prevent accidents and reduce the driver's driving burden, such as millimeter-wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU) and Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, as well as one or more ECUs that control these devices.
  • the driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance or autonomous driving functions.
  • the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63.
  • the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58, all of which are provided on the vehicle 40.
  • the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with external devices. For example, it sends and receives various information to and from external devices via wireless communication.
  • the communication module 60 may be located either inside or outside the electronic control unit 49.
  • the external device may be, for example, the base station 10 or user terminal 20 described above.
  • the communication module 60 may also be, for example, at least one of the base station 10 and user terminal 20 described above (or may function as at least one of the base station 10 and user terminal 20).
  • the communications module 60 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 50-58 described above input to the electronic control unit 49; information obtained based on these signals; and information based on input from the outside (user) obtained via the information service unit 59.
  • the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may also be referred to as input units that accept input.
  • the PUSCH transmitted by the communications module 60 may include information based on the above input.
  • the communications module 60 receives various information (traffic information, traffic signal information, vehicle-to-vehicle information, etc.) transmitted from external devices and displays it on the information service unit 59 installed in the vehicle.
  • the information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH received by the communications module 60 (or data/information decoded from the PDSCH)).
  • the communication module 60 stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and other components provided on the vehicle 40.
  • the term "user terminal” in this disclosure may be interpreted as “base station.”
  • the base station 10 may be configured to have the functions possessed by the user terminal 20 described above.
  • operations described as being performed by a base station may in some cases also be performed by its upper node.
  • a network including one or more network nodes having base stations it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation. Furthermore, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as they are consistent. For example, the methods described in this disclosure present various step elements in an exemplary order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4th generation mobile communication system 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • 6G 6th generation mobile communication system
  • xG x is, for example, an integer or decimal number
  • Future Radio Access FX
  • GSM Global System for Mobile communications
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), or other appropriate wireless communication methods, as
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to an element using a designation such as "first,” “second,” etc. does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must in some way precede the second element.
  • determining may encompass a wide variety of actions. For example, “determining” may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), ascertaining, etc.
  • determination may be considered to be “determining” receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.
  • maximum transmit power used in this disclosure may refer to the maximum value of transmit power, the nominal UE maximum transmit power, or the rated UE maximum transmit power.
  • connection means any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connected” may be read as "access.”
  • expressions such as "when A, B,” “if A, (then) B,” “B upon A,” “B in response to A,” “B based on A,” “B during/while A,” “B before A,” “B at (the same time as)/on A,” “B after A,” “B since A,” and “B until A” may be interchangeable.
  • a and B may be replaced with other appropriate expressions, such as nouns, gerunds, and regular sentences, depending on the context.
  • the time difference between A and B may be nearly zero (immediately after or immediately before).
  • a time offset may also be applied to the time at which A occurs.
  • “A” may be interpreted interchangeably as “before/after the time offset at which A occurs.”
  • the time offset (e.g., one or more symbols/slots) may be predefined or may be determined by the UE based on signaled information.
  • timing time, duration, time instance, any time unit (e.g., slot, subslot, symbol, subframe), period, occasion, and resource may be interpreted interchangeably.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un terminal selon un aspect de la présente divulgation comprend : une unité de réception qui reçoit une configuration d'un rapport sur des mesures entre une pluralité de ressources de mesure de canal sur la base de la pluralité de ressources de mesure de canal, qui correspondent respectivement à une pluralité de points d'émission et de réception (TRP) ; et une unité de commande qui détermine, sur la base d'informations de commande de liaison descendante et/ou de la configuration, si une pré-compensation basée sur le rapport doit être appliquée à au moins l'une de la pluralité de ressources de mesure de canal et d'un canal physique partagé de liaison descendante.
PCT/JP2024/005745 2024-02-19 2024-02-19 Terminal, procédé de communication sans fil et station de base Pending WO2025177339A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/005745 WO2025177339A1 (fr) 2024-02-19 2024-02-19 Terminal, procédé de communication sans fil et station de base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/005745 WO2025177339A1 (fr) 2024-02-19 2024-02-19 Terminal, procédé de communication sans fil et station de base

Publications (1)

Publication Number Publication Date
WO2025177339A1 true WO2025177339A1 (fr) 2025-08-28

Family

ID=96846573

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/005745 Pending WO2025177339A1 (fr) 2024-02-19 2024-02-19 Terminal, procédé de communication sans fil et station de base

Country Status (1)

Country Link
WO (1) WO2025177339A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240039597A1 (en) * 2021-08-05 2024-02-01 Apple Inc. Csi report enhancement for high-speed train scenarios
US20240056149A1 (en) * 2020-12-07 2024-02-15 Lenovo (Singapore) Pte. Ltd. Channel state information reporting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240056149A1 (en) * 2020-12-07 2024-02-15 Lenovo (Singapore) Pte. Ltd. Channel state information reporting
US20240039597A1 (en) * 2021-08-05 2024-02-01 Apple Inc. Csi report enhancement for high-speed train scenarios

Similar Documents

Publication Publication Date Title
WO2025177338A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025177339A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025220426A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025210915A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025210914A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025234043A1 (fr) Terminal, procédé de communication sans fil, et station de base
JP2025149831A (ja) 端末、無線通信方法及び基地局
JP2025149832A (ja) 端末、無線通信方法及び基地局
WO2025173159A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025173160A1 (fr) Terminal, procédé de communication radio, et station de base
WO2025210731A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025163733A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025173250A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025182799A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025163732A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025243823A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025210730A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025234098A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025182797A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025258045A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025041835A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025041834A1 (fr) Terminal, procédé de communication sans fil et station de base
WO2025210886A1 (fr) Terminal, procédé de communication sans fil, et station de base
WO2025173232A1 (fr) Terminal, procédé de communication radio et station de base
WO2025234017A1 (fr) Terminal, procédé de communication sans fil, et station de base

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24926010

Country of ref document: EP

Kind code of ref document: A1