Terminal, wireless communication method, base station and system

Abstract

A terminal according to one embodiment of the present disclosure is characterized by having: a reception unit for receiving configuration information that corresponds to both the application of channel measuring resources of a plurality of transmission / reception points and the application of channel measuring resources of a single transmission / reception point when a joint-channel state information report is applied; and a control unit for controlling the transmission of a channel state information report on the basis of the configuration information. According to one embodiment of the present disclosure, it is possible to appropriately perform CSI measurement and report for multi-panel / TRP.

Description

[Technical field]

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

[0002] In the Universal Mobile Telecommunications System (UMTS) network, Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency (Non-Patent Document 1). In addition, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered.

[0004] In existing LTE systems (e.g., 3GPP Rel. 8-14), a user equipment (User Equipment (UE)) transmits uplink control information (Uplink Control Information (UCI)) using at least one of an UL data channel (e.g., a Physical Uplink Shared Channel (PUSCH)) and an UL control channel (e.g., a Physical Uplink Control Channel (PUCCH)). [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 Summary of the Invention [Problem to be solved by the invention]

[0006] In NR, it is being considered that one or more transmission / reception points (TRPs) (multi-TRPs) will use one or more panels (multi-panels) to perform DL transmission (e.g., PDSCH transmission) to a user terminal (user terminal, User Equipment (UE)).

[0007] However, in previous NR specifications such as Rel.15, multi-panel / TRP was not taken into consideration, so it was unclear how to measure and report CSI when multi-panel / TRP is used. If CSI is not measured and reported appropriately, there is a risk of degradation of system performance, such as reduced throughput.

[0008] Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately measure and report CSI for a multi-panel / TRP. [Means for solving the problem]

[0009] A terminal according to one embodiment of the present disclosure includes: A transmitter that transmits capability information indicating whether it supports reporting of both channel state information (CSI) of a single transmission / reception point (single TRP) and CSI of multiple transmission / reception points (multi-TRP); Multi TR P A channel measurement resource (CMR); The above Single TR P A receiving unit that receives setting information corresponding to the CMR and a、C S Report and a control unit that controls the transmission of notifications, and the CMR of the multi-TRP and the Channel State Information-Interference Management (CSI-IM) resource for interference measurement of the multi-TRP are Quasi-Co-Location (QCL) for each resource. Effect of the Invention

[0010] According to one embodiment of the present disclosure, CSI for a multi-panel / TRP can be appropriately measured and reported. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing the CSI report configuration (CSI-ReportConfig) of 3GPP Rel.16. [Diagram 2] FIG. 2 is a diagram showing a first example of a CSI reporting configuration according to an implicit IMR configuration. [Diagram 3] FIG. 3 is a diagram showing a second example of a CSI reporting configuration according to an implicit IMR configuration. [Figure 4] FIG. 4 is a diagram showing the relationship between CMR and CSI-IM in option 1-1 of the first embodiment. [Diagram 5] FIG. 5 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 1-1 of the first embodiment. [Figure 6] FIG. 6 is a diagram showing the relationship between CMR and CSI-IM in option 1-2 of the first embodiment. [Figure 7] FIG. 7 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 1-2 of the first embodiment. [Figure 8] FIG. 8 is a diagram showing the relationship between CMR and CSI-IM in options 1-3 of the first embodiment. [Figure 9]FIG. 9 is a diagram showing the relationship between CSI pairs, ZP-IMR, and NZP-IMR in options 1-3 of the first embodiment. [Figure 10] FIG. 10 is a diagram showing the relationship between CMR and CSI-IM in options 1-4 of the first embodiment. [Figure 11] FIG. 11 is a diagram showing the relationship between CSI pairs, ZP-IMR, and NZP-IMR in options 1-4 of the first embodiment. [Figure 12] FIG. 12 is a diagram showing the relationship between CMR, CSI-IM, and NZP-IM in option 2-1 of the second embodiment. [Figure 13] FIG. 13 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-1 of the second embodiment. [Figure 14] FIG. 14 is a diagram showing the relationship between CMR and CSI-IM in option 2-2 of the second embodiment. [Figure 15] FIG. 15 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-2 of the second embodiment. [Figure 16] FIG. 16 is a diagram showing the relationship between CMR and CSI-IM in option 2-3 of the second embodiment. [Figure 17] FIG. 17 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-3 of the second embodiment. [Figure 18] FIG. 18 is a diagram showing the relationship between CMR and CSI-IM in option 2-4 of the second embodiment. [Figure 19] FIG. 19 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-4 of the second embodiment. [Figure 20] FIG. 20 is a diagram showing an example of CMR settings for option 3-1-1 in the third embodiment. [Figure 21] FIG. 21 is a diagram showing an example of CMR settings for option 3-1-2 in the third embodiment. [Figure 22]FIG. 22 is a diagram illustrating a setting example of CMR / CSI-IM of option 3-2-1 in the third embodiment. [Diagram 23] FIG. 23 is a diagram illustrating a setting example of CMR / CSI-IM of option 3-2-2 in the third embodiment. [Figure 24] FIG. 24 is a diagram showing a first setting example of the CMR of option 4-1-1 in the fourth embodiment. [Diagram 25] FIG. 25 is a diagram showing a second setting example of the CMR of option 4-1-1 in the fourth embodiment. [Figure 26] FIG. 26 is a diagram showing a first setting example of the CMR of option 4-1-2 in the fourth embodiment. [Figure 27] FIG. 27 is a diagram showing a second setting example of the CMR of option 4-1-2 in the fourth embodiment. [Figure 28] FIG. 28 is a diagram illustrating a setting example of CMR / CSI-IM of option 4-2-1 in the fourth embodiment. [Figure 29] FIG. 29 is a diagram illustrating a setting example of CMR / CSI-IM of option 4-2-2 in the fourth embodiment. [Diagram 30] FIG. 30 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. [Diagram 31] FIG. 31 is a diagram illustrating an example of the configuration of a base station according to an embodiment. [Diagram 32] FIG. 32 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. [Diagram 33] FIG. 33 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (CSI report or reporting) In Rel.15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feeding back, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station, for example, using an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)).

[0013] 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.

[0014] 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 including an SS and a PBCH (and a corresponding DMRS), and may be referred to as an SS block (SSB), etc. The SS may include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).

[0015] In addition, the CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio).

[0016] The UE may receive information on CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC). In the present disclosure, RRC IE may be interchangeably read as an RRC parameter, a higher layer parameter, and the like.

[0017] The reporting configuration information (eg, the RRC IE "CSI-ReportConfig") 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, e.g., RRC IE "reportQuantity") Information on the RS resource used to generate the amount (the CSI parameter) (resource information, for example, the RRC IE "CSI-ResourceConfigId") Information about the frequency domain for which CSI is reported (frequency domain information, e.g., RRC IE "reportFreqConfiguration")

[0018] For example, the report type information may indicate a periodic CSI (P-CSI) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI (SP-CSI) report.

[0019] Furthermore, the reporting amount information may specify at least one combination of the above CSI parameters (for example, CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0020] The resource information may also be an ID of a resource for RS. The resource for RS may include, for example, a non-zero power CSI-RS resource or an SSB, and a CSI-IM resource (for example, a zero power CSI-RS resource).

[0021] The frequency domain information may also indicate frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (a component carrier (CC)), a cell, a serving cell), or the entirety of a bandwidth part (BWP) in a certain carrier. The wideband may be rephrased as a CSI reporting band, the entire CSI reporting band, or the like.

[0022] Also, a subband is a part 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 (the number of PRBs).

[0023] The frequency domain information may indicate whether wideband or subband PMI is to be reported (for example, the frequency domain information may include an 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.

[0024] If wideband PMI reporting is configured, one wideband PMI may be reported for the entire CSI reporting band, whereas if subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., a subband indication for each subband) may be reported for each of the one or more subbands in the entire CSI reporting band.

[0025] The UE performs channel estimation using the received RS to estimate a channel matrix H. The UE feeds back a propagation mediation index (PMI) that is determined based on the estimated channel matrix.

[0026] The PMI may indicate a precoder matrix (also referred to as a precoder) that the UE considers appropriate for use in downlink (DL) transmission to the UE. Each value of the PMI may correspond to one precoder matrix. A set of values ​​of the PMI may correspond to a set of different precoder matrices called a precoder codebook (also referred to as a codebook).

[0027] In the space domain, a CSI report may include one or more types of CSI. For example, 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 a multi-beam. A single beam may be rephrased as a single layer, and a multi-beam may be rephrased as multiple beams. In addition, type-1 CSI does not assume multi-user multiple input multiple output (MIMO), and type-2 CSI may assume multi-user MIMO.

[0028] The codebook 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.). Furthermore, the type-1 CSI may 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.

[0029] In the present disclosure, Type 1 and Type I may be interpreted as interchangeable. In the present disclosure, Type 2 and Type II may be interpreted as interchangeable.

[0030] The uplink control information (UCI) type may include at least one of a hybrid automatic repeat reQuest ACKnowledgement (HARQ-ACK), a scheduling request (SR), and a CSI. The UCI may be carried by a PUCCH or a PUSCH.

[0031] In Rel.15 NR, UCI can contain one CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported.

[0032] In Rel.15 NR, UCI can include two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and some subband PMI information. CSI part 1 and CSI part 2 are coded separately.

[0033] In Rel.15 NR, a UE is configured by a higher layer with report settings of N (N≧1) CSI reporting configurations and resource settings of M (M≧1) CSI resource configurations. For example, a CSI reporting configuration (CSI-ReportConfig) includes resource settings for channel measurement (resourcesForChannelMeasurement), CSI-IM resource settings for interference (csi-IM-ResourceForInterference), NZP-CSI-RS settings for interference (nzp-CSI-RS-ResourceForInterference), and a report quantity (reportQuantity). Each of the resource settings for channel measurement, the CSI-IM resource settings for interference, and the NZP-CSI-RS settings for interference is 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, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0034] For both FR1 and FR2, evaluation and provision of CSI reporting for DL ​​multi-TRP and / or multi-panel transmissions is under consideration to enable more dynamic channel / interference hypotheses for NCJT.

[0035] (Multi-TRP) In NR, it is considered that one or more transmission / reception points (TRPs) (multi-TRPs (MTRPs)) will perform DL transmission to a UE using one or more panels (multi-panels). It is also considered that a UE will perform UL transmission to one or more TRPs using one or more panels.

[0036] Note that multiple TRPs may correspond to the same cell identifier (cell identifier (ID)) or different cell IDs. The cell ID may be a physical cell ID or a virtual cell ID.

[0037] The multi-TRP (TRP#1, #2) may be connected by an ideal / non-ideal backhaul to exchange information, data, etc. Each TRP of the multi-TRP may transmit a different code word (CW) and a different layer. Non-Coherent Joint Transmission (NCJT) may be used as a form of multi-TRP transmission.

[0038] In the NCJT, for example, TRP1 performs modulation mapping and layer mapping on a first codeword to transmit a first PDSCH using a first number of layers (e.g., two layers) with a first precoding, and TRP2 performs modulation mapping and layer mapping on a second codeword to transmit a second PDSCH using a second number of layers (e.g., two layers) with a second precoding.

[0039] In addition, multiple PDSCHs (multi-PDSCHs) that are NCJTed may be defined as partially or completely overlapping with respect to at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap with at least one of the time and frequency resources.

[0040] The first PDSCH and the second PDSCH may be assumed to be not quasi-co-located (QCL). Reception of multiple PDSCHs may be interpreted as simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0041] Multiple PDSCHs from multiple TRPs (may be called multiple PDSCHs) may be scheduled using one DCI (single DCI (S-DCI), single PDCCH) (single master mode). One DCI may be transmitted from one TRP of the multiple TRP. Multiple PDSCHs from multiple TRPs may be scheduled using multiple DCIs (multiple DCI (M-DCI), multiple PDCCHs) (multiple master mode). Multiple DCIs may be transmitted from multiple TRPs. It may be assumed that the UE transmits separate CSI reports for each TRP to different TRPs. Such CSI feedback may be called separate feedback, separate CSI feedback, etc. In the present disclosure, "separate" may be interchangeably read as "independent".

[0042] In addition, CSI feedback in which CSI reports regarding both TRPs are transmitted to one TRP may be used. Such CSI feedback may be called joint feedback, joint CSI feedback, or the like.

[0043] For example, in the case of separate feedback, the UE is configured to transmit a CSI report for TRP#1 using one PUCCH (PUCCH1) for TRP#1 and transmit a CSI report for TRP#2 using another PUCCH (PUCCH2) for TRP#2. In the case of joint feedback, the UE transmits a CSI report for TRP#1 and a CSI report for TRP#2 for TRP#1 or #2.

[0044] Such a multi-TRP scenario allows for more flexible transmission control using channels with better quality.

[0045] For multi-TRP transmission, it is not clear how to measure and report the CSI for different TRPs, since the CSI for different TRPs is usually different. For one TRP, the channel / interference assumptions vary depending on the transmission decisions (traffic) of the neighboring TRPs.

[0046] For example, a CSI report for separate feedback (which may be referred to as a separate CSI report) may be configured using one CSI reporting configuration (CSI-ReportConfig) associated with one TRP.

[0047] The CSI reporting configuration may correspond to one interference assumption for one TRP (i.e., a different CSI reporting configuration may be used for each TRP and for each interference assumption). The CSI reporting configuration may correspond to multiple interference assumptions for one TRP (i.e., a different CSI reporting configuration may be used for each TRP and one CSI reporting configuration may be associated with multiple interference assumptions for a TRP).

[0048] Also, for example, a CSI report for joint feedback (which may be referred to as a joint CSI report) may be configured using one CSI reporting configuration (CSI-ReportConfig) associated with multiple TRPs.

[0049] The CSI reporting configuration may correspond to one interference assumption for each of the multiple TRPs (i.e., a CSI report including CSI of interference assumption #1 for TRP#1 and CSI of interference assumption #1 for TRP#2 may be configured using one CSI reporting configuration, and a CSI report including CSI of interference assumption #2 for TRP#1 and CSI of interference assumption #1 for TRP#2 may be configured using another CSI reporting configuration). The CSI reporting configuration may correspond to multiple interference assumptions for each of the multiple TRPs (i.e., a CSI report including two CSIs of interference assumptions #1 and #2 for TRP#1 and two CSIs of interference assumptions #3 and #4 for TRP#2 may be configured using one CSI reporting configuration).

[0050] In addition, the CSI reporting configuration for the joint CSI report may include a resource configuration for each TRP (at least one of a resource setting for channel measurement, a CSI-IM resource setting for interference, and an NZP-CSI-RS setting for interference). The resource configuration of a certain TRP may be configured by being included in a resource setting group.

[0051] In addition, the resource configuration group may be identified by a configured resource configuration group index. The resource configuration group may be interchangeably read as a report group. The resource configuration group index (which may simply be called a group index) may indicate a CSI report related to a TRP (which TRP a certain CSI report (or CSI reporting configuration, CSI resource configuration, CSI-RS resource set, CSI-RS resource, TCI state, QCL, etc.) corresponds to). For example, group index #i may correspond to TRP #i.

[0052] A CSI reporting configuration for separate CSI reporting may be referred to as a separate CSI reporting configuration, a separate CSI configuration, etc. A CSI reporting configuration for joint CSI reporting may be referred to as a joint CSI reporting configuration, a joint CSI configuration, etc.

[0053] Regarding MTRP, it is preferable that single TRP (STRP) transmission and MTRP transmission are dynamically switched according to the channel state and the like. For this purpose, the following CSI is required: · CSI for TRP1 (the first TRP) assuming STRP transmission (hereinafter also referred to as CSI_A), · CSI for TRP2 (the second TRP) assuming STRP transmission (hereinafter also referred to as CSI_B), · CSI for TRP1 considering TRP / beam interference from TRP2 assuming NCJT transmission of MTRP (hereinafter also referred to as CSI_C), · CSI for TRP2 considering TRP / beam interference from TRP1 assuming NCJT transmission of MTRP (hereinafter also referred to as CSI_D).

[0054] <CMR and IMR> When interference measurement is performed with CSI-IM, each CSI-RS resource for channel measurement is associated with the CSI-IM resource in resource units according to the ordering of the CSI-RS resources and CSI-IM resources within the corresponding resource set. The number of CSI-RS resources for channel measurement may be the same as the number of CSI-IM resources.

[0055] In the case of ZP-CSI-RS based interference measurement, the CSI-RS resource (CMR) for channel measurement and the CSI-RS resource (IMR) for interference measurement are associated on a per-resource basis. That is, it is a one-to-one mapping.

[0056] K SIf (>1) resources are configured in the corresponding resource set for channel measurement, the UE shall derive CSI parameters other than CRI conditioned on the reported CRI, where CRI k (k≧0) corresponds to the (k+1)th configured entry of the associated nzp-CSI-RSResource in the corresponding nzp-CSI-RS-ResourceSet for channel measurement and corresponds to the (k+1)th configured entry of the associated csi-IM-Resource in the corresponding csi-IM-ResourceSet (if configured).

[0057] In other words, CRI k (k≧0) corresponds to the (k+1)th set CMR and the (k+1)th set IMR.

[0058] <Aperiodic CSI> For aperiodic CSI, each trigger state configured using the higher layer parameter "CSI-AperiodicTriggerState" is associated with one or more CSI reporting configurations (CSI-ReportConfig). Each CSI reporting configuration is linked to a periodic, semi-persistent or aperiodic resource setting.

[0059] If one resource configuration is configured, then that resource configuration (given by the higher layer parameter resourcesForChannelMeasurement) is for channel measurement for L1-RSRP or L1-SINR calculation.

[0060] If two resource configurations are configured, the first resource configuration (given by the higher layer parameter resourcesForChannelMeasurement) is for channel measurements and the second resource configuration (given by the higher layer parameter csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference) is for interference measurements performed on CSI-IM or NZP-CSI-RS.

[0061] If three resource configurations are configured, the first resource configuration (given by the higher layer parameter resourcesForChannelMeasurement) is for channel measurements, the second resource configuration (given by the higher layer parameter csi-IM-ResourcesForInterference) is for CSI-IM based interference measurements and the third resource configuration (given by the higher layer parameter nzp-CSI-RS-ResourcesForInterference) is for NZP-CSI-RS based interference measurements.

[0062] When aperiodic CSI is applied, NR may support interference measurements based on ZP-CSI-RS only, NZP-CSI-RS only, and ZP-CSI-RS and NZP-CSI-RS.

[0063] <Periodic or semi-persistent CSI> When periodic or semi-persistent CSI is applied, each CSI report configuration (CSI-ReportConfig) is linked to a periodic or semi-persistent resource setting.

[0064] If one resource configuration (given by the higher layer parameter resourcesForChannelMeasurement) is configured, the resource configuration is for channel measurements for L1-RSRP calculation.

[0065] When two resource configurations are set, the first resource configuration (given by the upper layer parameter resourcesForChannelMeasurement) is for channel measurement, and the second resource configuration (given by the upper layer parameter csi-IM-ResourcesForInterference) is for interference measurement performed in CSI-IM.

[0066] When periodic or semi-persistent CSI is applied, NR may support only interference measurements based on ZP-CSI-RS.

[0067] <CSI-IM Resource and CSI-RS Resource> The CSI-IM resource for interference measurement, the NZP-CSI-RS resource for interference measurement, and the NZP-CSI-RS resource for channel measurement are set by upper layer signaling for one or more CSI resource configurations for channel and interference measurement.

[0068] The UE may assume that the NZP-CSI-RS resource for channel measurement and the CSI-IM resource for interference measurement set for one CSI report are QCL for each resource with respect to "QCL-TypeD". When the NZP-CSI-RS resource is used for interference measurement, the UE may assume that the NZP-CSI-RS resource for channel measurement and the CSI-IM resource or NZP-CSI-RS resource for interference measurement set for one CSI report are QCL with respect to "QCL-TypeD".

[0069] That is, when ZP-CSI-RS based interference measurement is applied, the UE may assume that the same receive beam indicated by the base station (gNB) for channel measurement is used for interference measurement.

[0070] <CSI Report Configuration> Fig. 1 is a diagram showing the CSI report configuration (CSI-ReportConfig) of 3GPP Rel. 16. As shown in Fig. 1, resourcesForChannelMeasurement (CMR), csi-IM-ResourcesForInterference (ZP-IMR), nzp-CSI-RS-ResourcesForInterference (NZP-IMR), reportConfigType, etc. are set as the CSI report configuration, which is an information element of RRC. The reportConfigType includes periodic, semiPersistentOnPUCCH, semiPersistentOnPUSCH, and aperiodic.

[0071] <Implicit IMR setting> For a joint CSI report, the CMR for one CSI (TRP) may correspond to the IMR for the other CSI (TRP). With this configuration, the two CSIs included in the joint CSI report for NCJT transmission are expected to closely match the actual inter-TRP interference (accurate enough for direct scheduling), and no further CSI updates are required by the network implementation.

[0072] The UE may assume that for a certain CSI reporting configuration (joint CSI configuration), there is no explicit IMR configuration for inter-TRP interference. In this case, the specification may specify the assumption of additional IMR when a joint CSI configuration is configured.

[0073] For example, in joint CSI configuration, in addition to or instead of an explicit ZP-IMR / NZP-IMR, it may be assumed that a CMR (resources specified by resourcesForChannelMeasurement) for one TRP is included in (or is the same as) an additional NZP-IMR for another TRP (CMR), where the additional NZP-IMR for the other TRP is not explicitly configured.

[0074] The information regarding the additional NZP-IMR may be predefined by a specification or may be notified to the UE using at least one of RRC, MAC CE, and DCI.

[0075] 2 is a diagram showing a first example of CSI reporting configuration for implicit IMR configuration, in which SSB / CSI-RS ID=Y is not explicitly configured for NZP-IMR of TRP#1, and SSB / CSI-RS ID=X is not explicitly configured for NZP-IMR of TRP#2.

[0076] Even without explicit NZP-IMR configuration, the UE may assume that SSB / CSI-RS ID=Y corresponding to the CMR of TRP#2 corresponds to the NZP-IMR of TRP#1, and that SSB / CSI-RS ID=X corresponding to the CMR of TRP#1 corresponds to the NZP-IMR of TRP#2. The UE may perform channel / interference measurements, etc. based on these assumptions and perform joint CSI reporting.

[0077] Figure 3 is a diagram showing a second example of CSI reporting configuration related to implicit IMR configuration. Figure 3 is similar to Figure 2, so a duplicated description will not be provided. Figure 3 differs from Figure 2 in that ZP-IMR and NZP-IMR are set in common (shared) to two TRPs.

[0078] The UE may use the commonly set NZP-IMR and the SSB / CSI-RS ID=Y corresponding to the CMR of TRP#2 as the NZP-IMR of TRP#1. The UE may use the commonly set NZP-IMR and the SSB / CSI-RS ID=X corresponding to the CMR of TRP#1 as the NZP-IMR of TRP#2.

[0079] However, in previous NR specifications such as Rel.15, multi-panel / TRPs were not taken into consideration, so it is unclear how to measure and report CSI when multi-panel / TRPs are used. It is also unclear how to jointly measure / report CSI under the multi-panel / TRP hypothesis and the single-panel / TRP hypothesis.

[0080] If the CSI is not measured and reported appropriately, there is a risk that system performance will deteriorate, such as a decrease in throughput. Therefore, the present inventors have conceived of a method for appropriately measuring and reporting the CSI for a multi-panel / TRP.

[0081] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. Wireless communication methods according to the embodiments may be applied independently or in combination.

[0082] In the present disclosure, "A / B" and "at least one of A and B" may be read as interchangeable.

[0083] In the present disclosure, panel, Uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (COntrol REsource SET (CORESET)), PDSCH, codeword, base station, antenna port of a certain signal (e.g., DeModulation Reference Signal (DMRS) port), antenna port group of a certain signal (e.g., DMRS port group), group for multiplexing (e.g., Code Division Multiplexing (CDM) group, reference signal group, CORESET group), CORESET pool, CW, redundancy version (RV), layer (MIMO layer, transmission layer, spatial layer), may be read as mutually interchangeable. Also, panel identifier (ID) and panel may be read as mutually interchangeable. In the present disclosure, TRP ID and TRP may be read as mutually interchangeable.

[0084] In the present disclosure, NCJT, NCJT using multi-TRP, multi-PDSCH using NCJT, multi-PDSCH, multiple PDSCH from multi-TRP, etc. may be read as interchangeable. Note that multi-PDSCH may mean multiple PDSCHs in which at least a part of time resources (e.g., one symbol) overlap, may mean multiple PDSCHs in which all time resources (e.g., all symbols) overlap, may mean multiple PDSCHs in which all time resources do not overlap, may mean multiple PDSCHs carrying the same TB or the same CW, or may mean multiple PDSCHs to which different UE beams (spatial domain receive filters, QCL parameters) are applied.

[0085] In the present disclosure, normal TRP, single TRP, S-TRP, single TRP system, single TRP transmission, and single PDSCH may be interchangeable. In the present disclosure, multi-TRP, MTRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be interchangeable. In the present disclosure, single DCI, single PDCCH, multi-TRP based on single DCI, and activating two TCI states on at least one TCI codepoint may be interchangeable.

[0086] In the present disclosure, a single TRP, a channel using a single TRP, a channel using one TCI state / spatial relationship, multi-TRP not being enabled by RRC / DCI, multiple TCI states / spatial relationships not being enabled by RRC / DCI, a CORESETPoolIndex value of one not being set for any CORESET and no code point in the TCI field being mapped to two TCI states, communication with one transmission / reception point, and application of a single TRP may be read as interchangeable.

[0087] In the present disclosure, the CRI index, the CRI reporting index, and the reported CRI index may be read as interchangeable.

[0088] In this disclosure, index, ID, indicator, resource ID, etc. may be interchangeable. In this disclosure, beam, TCI, TCI state, DL TCI state, UL TCI state, unified TCI state, QCL, QCL assumption, spatial relationship, spatial relationship information, precoder, etc. may be interchangeable.

[0089] In the present disclosure, resource setting for channel measurement, resource for channel measurement, CSI-RS resource for channel measurement, resourcesForChannelMeasurement, CMR, and CMR resource may be read as interchangeable.

[0090] In the present disclosure, CSI-IM, CSI-IM resource, ZP-IMR, ZP-IMR resource, ZP-CSI-RS, ZP-CSI-RS resource, CSI-IM resource setting for interference, CSI-IM based resource for interference measurement, csi-IM-ResourceForInterference, resource for interference measurement, and CSI-RS resource for interference measurement may be read as interchangeable.

[0091] In the present disclosure, NZP-IM, NZP-IM resources (NZP-IMR), NZP-IMR resources, NZP-CSI-RS, NZP-CSI-RS resources, NZP-CSI-RS resource setting for interference, NZP-CSI-RS based resources for interference measurement, nzp-CSI-RS-ResourcesForInterference, resources for interference measurement, and CSI-RS resources for interference measurement may be read as interchangeable.

[0092] In the present disclosure, a CSI report, a CSI reporting configuration, a CSI configuration, a resource configuration, a resource setting, etc. may be interchangeable. Also, in the present disclosure, supporting, controlling, capable of controlling, operating, capable of operating, executing, capable of executing, etc. may be interchangeable.

[0093] (Wireless communication method) The UE may determine a first interference measurement resource (ZP-IMR / NZP-IMR) corresponding to the first transmission / reception point (TRP) or a second interference measurement resource (ZP-IMR / NZP-IMR) corresponding to the second TRP based on at least one of a first channel measurement resource (CMR) corresponding to the first transmission / reception point (TRP) and a second channel measurement resource (CMR) corresponding to the second transmission / reception point (TRP).Then, the UE may transmit a channel state information (CSI) report based on the first CMR and the second CMR.

[0094] The UE may transmit a report of a CSI pair including the first CMR and the second CMR corresponding to the same interference measurement resource (ZP-IMR / NZP-IMR).

[0095] The first TRP corresponds to TRP#1 described later, and the second TRP corresponds to TRP#2 described later. The first CMR corresponds to at least one of CMR#0 to #3 described later, and the second CMR corresponds to at least one of CMR#4 to #7 described later. The first interference measurement resource corresponds to at least one of CSI-IM(ZP-IMR)#a to #d described later, or at least one of NZP-IM#A to #D described later. The second interference measurement resource corresponds to, for example, at least one of CSI-IM(ZP-IMR)#e to #h described later, or at least one of NZP-IM#E to #H described later. In the present disclosure, "first" and "second" may be read as interchangeable.

[0096] In the present disclosure, A (or B) corresponding / associating with B (or A), the UE assuming / determining A (or B) as B (or A), and the UE assuming / determining B (or A) based on A (or B) may be read as interchangeable.

[0097] <First embodiment> For periodic and semi-persistent CSI, NR may support only interference measurement based on ZP-CSI-RS. If a specific (new) RRC parameter is configured, the UE may assume the CMR of the other TRP as the NZP-IMR of the first TRP and the CMR of the first TRP as the NZP-IMR of the other TRP. If the specific (new) RRC parameter is not configured, the UE may perform interference measurement based only on ZP-IMR (CSI-IM).

[0098] That is, when a specific higher layer parameter (RRC parameter) is configured, the UE may determine the first non-zero power interference measurement resource (NZP-IMR) based on the second CMR.

[0099] [Option 1-1] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0100] In the CSI-IM configuration, a maximum of N ZP-CSI-RS resources in total may be configured, and two TRPs may share the ZP-CSI-RS resources.

[0101] Fig. 4 is a diagram showing the relationship between CMR and CSI-IM in option 1-1 of the first embodiment. As shown in Fig. 4, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0 and #4 correspond to CSI-IM#a, CMR#1 and #5 correspond to CSI-IM#b, CMR#2 and #6 correspond to CSI-IM#c, and CMR#3 and #7 correspond to CSI-IM#d.

[0102] Fig. 5 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 1-1 of the first embodiment. Fig. 5 corresponds to Fig. 4. As shown in Fig. 5, CMRs corresponding to the same ZP-IMR (CSI-IM) and different TRPs are configured as a CSI pair. ZP-IMR and NZP-IMR are assumed to be settings within the CSI reporting configuration (this is also true for other drawings).

[0103] The UE measures N pairs of CSI from two TRPs assumed for NCJT, where each pair includes the kth CMR associated with each TRP (e.g., the kth CMR and the (k+N)th CMR are paired). For the two CSIs of each pair, the UE may assume a one-to-one mapping between the CMRs associated with each TRP and the CSI-IM.

[0104] After measuring each pair, the UE may report one (or more) CSI pairs selected for reporting among the pairs. The UE may determine the pair / number of pairs to report based on the specifications or settings by the RRC, etc. The UE may transmit a CSI report including the CRI shown in the following options 1-1-1 and 1-1-2 for the selected CSI pairs.

[0105] [[Option 1-1-1]] Two CRIs (CRIj and CRIj+N) may correspond to two CSIs, one with the configured (j+1)th CMR and the (j+1)th CSI-IM, and the other CSI with the configured (j+1+N)th CMR and the (j+1)th CSI-IM.

[0106] [[Option 1-1-2]] One CRI (CRIj) may correspond to two CSIs, one with the configured (j+1)th CMR and (j+1)th CSI-IM, and the other with the configured (j+1+N)th CMR and (j+1)th CSI-IM. In option 1-1-2, one CRI (CRIj) means two CRIs reporting CRIj and CRIj+N.

[0107] Good beam pairs may be reported by group-based beam reporting. In that case, since the good beam pairs are narrowed down, the processing can be simplified by configuring only N pairs as in option 1-1. In this case, the base station (gNB) only needs to be configured to obtain the CSI of the reported beam pairs.

[0108] [Option 1-2] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0109] In the CSI-IM configuration, a maximum of N ZP-CSI-RS resources in total may be configured, and two TRPs may share the ZP-CSI-RS resources.

[0110] Fig. 6 is a diagram showing the relationship between CMR and CSI-IM in option 1-2 of the first embodiment. As shown in Fig. 6, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0, #4 to #7 correspond to CSI-IM#a, CMR#1, #4 to #7 correspond to CSI-IM#b, CMR#2, #4 to #7 correspond to CSI-IM#c, and CMR#3, #4 to #7 correspond to CSI-IM#d. Note that some of the correspondences are not shown in the figure.

[0111] Fig. 7 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 1-2 of the first embodiment. Fig. 7 corresponds to Fig. 6. As shown in Fig. 7, CMRs corresponding to the same ZP-IMR (CSI-IM) and different TRPs are set as a CSI pair. The example in Fig. 7 differs from the example in Fig. 5 in that the number of pairs is N × N.

[0112] The UE measures N × N pairs of CSI from two TRPs assumed for NCJT, where each pair contains the CMR associated with each TRP for all possible combinations. For each pair of two CSIs, the UE assumes the k-th CSI-IM for interference measurement of the CSI pair containing the k-th CMR.

[0113] For one CSI pair selected for reporting, the UE may report two CRIs, CRIj (j≧0) and CRIp (p≧N), which may correspond to two CSIs, one CSI with the configured (j+1)th CMR and the (j+1)th CSI-IM, and the other CSI with the configured pth CMR and the (j+1)th CSI-IM.

[0114] [Option 1-3] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMRs in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0115] In the CSI-IM configuration, up to N ZP-CSI-RS resources are configured for each TRP. Therefore, in the CSI reporting configuration of ZP-IMR in the MTRP NCJT CSI configuration, up to 2N ZP-CSI-RS resources in total may be configured.

[0116] Fig. 8 is a diagram showing the relationship between CMR and CSI-IM in options 1-3 of the first embodiment. As shown in Fig. 8, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0 to #7 correspond one-to-one to CSI-IM#a to #h, respectively.

[0117] Fig. 9 is a diagram showing the relationship between CSI pairs, ZP-IMR, and NZP-IMR in options 1-3 of the first embodiment. Fig. 9 corresponds to Fig. 8. Fig. 9 differs from Fig. 5 in that there are two ZP-IMRs (CSI-IMs) for one CSI pair.

[0118] The UE measures N pairs of CSI from two TRPs assumed for NCJT, where each pair includes the kth CMR associated with each TRP (e.g., the kth CMR and the (k+N)th CMR are paired). For the two CSIs in each pair, the UE may assume a one-to-one mapping between the CMR and CSI-IM.

[0119] After measuring each pair, the UE may report one or more CSI pairs selected for reporting among the pairs. The UE may determine the pair / number of pairs to report based on the specifications or settings by RRC, etc. The UE may transmit a CSI report including the CRI shown in the following options 1-3-1 and 1-3-2 for the selected CSI pairs.

[0120] [[Option 1-3-1]] Two CRIs (CRIj and CRIj+N) may correspond to two CSIs, one with the configured (j+1)th CMR and the (j+1)th CSI-IM, and the other CSI with the configured (j+1+N)th CMR and the (j+1+N)th CSI-IM.

[0121] [[Option 1-3-2]] One CRI (CRIj) may correspond to two CSIs, one with the configured (j+1)th CMR and (j+1)th CSI-IM, and the other with the configured (j+1+N)th CMR and (j+1+N)th CSI-IM. In option 1-3-2, one CRI (CRIj) means two CRIs reporting CRIj and CRIj+N.

[0122] [Option 1-4] In the CMR configuration, up to N CMRs (SSB / NZP-CSI-RS) may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0123] In the CSI-IM configuration, up to N ZP-CSI-RS resources are configured for each TRP. Therefore, in the CSI reporting configuration of ZP-IMR in the MTRP NCJT CSI configuration, up to 2N ZP-CSI-RS resources in total may be configured.

[0124] Fig. 10 is a diagram showing the relationship between CMR and CSI-IM in options 1-4 of the first embodiment. As shown in Fig. 10, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0, #4 to #7 correspond to CSI-IM#a, CMR#1, #4 to #7 correspond to CSI-IM#b, CMR#2, #4 to #7 correspond to CSI-IM#c, and CMR#3, #4 to #7 correspond to CSI-IM#d. Furthermore, CMR#4 to #7 correspond one-to-one to CSI-IM#e to #h, respectively. Note that some of the correspondences are omitted from the illustration.

[0125] Fig. 11 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in options 1-4 of the first embodiment. Fig. 11 corresponds to Fig. 10. As shown in Fig. 11, CMRs corresponding to the same ZP-IMR (CSI-IM) are set as a CSI pair. Fig. 11 differs from Fig. 7 in that there are two ZP-IMRs (CSI-IMs) for one CSI pair.

[0126] The UE measures N × N pairs of CSI from two TRPs assumed for NCJT, where each pair contains the CMRs associated with each TRP for all possible combinations. For each pair of two CSIs, the UE assumes the k-th CSI-IM for interference measurement of the k-th CMR.

[0127] For one CSI pair selected for reporting, the UE may report two CRIs, CRIj (j≧0) and CRIp (p≧N), which may correspond to two CSIs, one CSI with the configured (j+1)th CMR and (j+1)th CSI-IM, and the other CSI with the configured pth CMR and pth CSI-IM.

[0128] According to the first embodiment, the mapping between CMR and ZP-IMR / NZP-IMR of two TRPs is made clear for CSI measurements related to the CSI reporting configuration of NCJT in the case of periodic and semi-persistent CSI.

[0129] <Second embodiment> For aperiodic CSI, NR may support interference measurement based on ZP-CSI-RS only, NZP-CSI-RS only, and both ZP-CSI-RS and NZP-CSI-RS. In aperiodic CSI, when interference measurement is configured based on ZP-CSI-RS only, the methods of each option in the first embodiment may be applied.

[0130] In the case of aperiodic CSI, when interference measurement is configured based on only ZP-CSI-RS or both ZP-CSI-RS and NZP-CSI-RS, any of the following aspects 1 to 3 may be applied.

[0131] [Aspect 1] For two CSIs as a CSI pair, the UE does not assume the CMR of one TRP as the NZP-IMR of the other TRP.

[0132] [Aspect 2] For two CSIs as a CSI pair, if indicated by a specific (new) RRC parameter, the UE assumes the CMR of one TRP as the NZP-IMR of the other TRP.

[0133] [Aspect 3] For two CSIs as a CSI pair of aperiodic CSI, if a specific (new) RRC parameter instructs the UE to assume the CMR of one TRP as the NZP-IMR of the other TRP, the UE does not assume that the NZP-CSI-RS for interference measurement is configured.

[0134] In the aspects 1 to 3, at least one of options 2-1 to 2-4 described below may be applied to the mapping between the CMR and the CSI-IM / NZP-CSI-RS (NZP-IMR). The main difference between options 2-1 to 2-4 and options 1-1 to 1-4 is that the NZP-CSI-RS (NZP-IMR) for interference measurement is taken into consideration.

[0135] [Option 2-1] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0136] In the CSI-IM configuration, a maximum of N ZP-CSI-RS resources in total may be configured, and two TRPs may share the ZP-CSI-RS resources.

[0137] A maximum of N NZP-CSI-RS resources in total may be configured for NZP-CSI-RS for interference measurement, and two TRPs may share the NZP-CSI-RS resources.

[0138] Fig. 12 is a diagram showing the relationship between CMR, CSI-IM, and NZP-IM in option 2-1 of the second embodiment. As shown in Fig. 12, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0 and #4 correspond to CSI-IM#a and NZP-IM#A, CMR#1 and #5 correspond to CSI-IM#b and NZP-IM#B, CMR#2 and #6 correspond to CSI-IM#c and NZP-IM#C, and CMR#3 and #7 correspond to CSI-IM#d and NZP-IM#D.

[0139] FIG. 13 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-1 of the second embodiment. FIG. 13 corresponds to FIG. 12. As shown in FIG. 13, CMRs corresponding to the same ZP-IMR (CSI-IM) and NZP-IM and different TRPs are configured as a CSI pair. ZP-IMR and NZP-IMR are assumed to be settings in the CSI reporting configuration (similar to other drawings). ZP-IMR and NZP-IMR are assumed to be settings in the CSI reporting configuration (similar to other drawings). NZP-IMR by CMR is NZP-IMR assumed using CMR, and differs depending on which of the above-mentioned aspects 1 to 3 is applied (similar to other drawings).

[0140] The UE measures N pairs of CSI from two TRPs assumed for NCJT, where each pair includes the kth CMR associated with each TRP (e.g., the kth CMR and the (k+N)th CMR are paired). For the two CSIs of each pair, the UE may assume a one-to-one mapping between the CMRs associated with each TRP and CSI-IM / NZP-CSI-RS.

[0141] After measuring each pair, the UE may report one or more CSI pairs selected for reporting among the pairs. The UE may determine the pair / number of pairs to report based on the specifications or a setting by the RRC, etc. The UE may transmit a CSI report including the CRI shown in the following options 2-1-1 and 2-1-2 for the selected CSI pairs.

[0142] [[Option 2-1-1]] Two CRIs (CRIj and CRIj+N) may correspond to two CSIs with one CSI with the configured (j+1)th CMR and (j+1)th CSI-IM / NZP-IM and the other CSI with the configured (j+1+N)th CMR and (j+1)th CSI-IM / NZP-IM.

[0143] [[Option 2-1-2]] One CRI (CRIj) may correspond to two CSIs, one with the configured (j+1)th CMR and (j+1)th CSI-IM / NZP-IM, and the other with the configured (j+1+N)th CMR and (j+1)th CSI-IM / NZP-IM. In option 1-1-2, one CRI (CRIj) means two CRIs reporting CRIj and CRIj+N.

[0144] Good beam pairs may be reported by group-based beam reporting. In that case, since the good beam pairs are narrowed down, the processing can be simplified by configuring only N pairs as in option 2-1. In this case, the base station (gNB) only needs to be configured to obtain the CSI of the reported beam pairs.

[0145] [Option 2-2] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0146] In the CSI-IM configuration, a maximum of N ZP-CSI-RS resources in total may be configured, and two TRPs may share the ZP-CSI-RS resources.

[0147] A maximum of N NZP-CSI-RS resources in total may be configured for NZP-CSI-RS for interference measurement, and two TRPs may share the NZP-CSI-RS resources.

[0148] Fig. 14 is a diagram showing the relationship between CMR and CSI-IM in option 2-2 of the second embodiment. As shown in Fig. 14, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0, #4 to #7 correspond to CSI-IM#a and NZP-IM#A, CMR#1, #4 to #7 correspond to CSI-IM#b and NZP-IM#B, CMR#2, #4 to #7 correspond to CSI-IM#c and NZP-IM#C, and CMR#3, #4 to #7 correspond to CSI-IM#d and NZP-IM#D. Note that some of the correspondences are omitted from the illustration.

[0149] Fig. 15 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-2 of the second embodiment. Fig. 15 corresponds to Fig. 14. As shown in Fig. 15, CMRs corresponding to the same ZP-IMR (CSI-IM) and NZP-IM and different TRPs are set as a CSI pair. The example of Fig. 15 differs from the example of Fig. 13 in that the number of pairs is N × N. "NZP-IMR by CMR" differs depending on which of the above-mentioned aspects 1 to 3 is applied.

[0150] The UE measures N×N pairs of CSI from two TRPs assumed for NCJT, where each pair includes the CMR associated with each TRP for all possible combinations. For each pair of two CSIs, the UE assumes the k-th CSI-IM and the k-th NZP-IM for interference measurement of the CSI pair including the k-th CMR.

[0151] For one CSI pair selected for reporting, the UE may report two CRIs, CRIj (j≧0) and CRIp (p≧N), which may correspond to two CSIs, one CSI with the configured (j+1)th CMR and the (j+1)th CSI-IM / NZP-IM, and the other CSI with the configured pth CMR and the (j+1)th CSI-IM / NZP-IM.

[0152] [Option 2-3] In the CMR configuration, up to N CMRs (SSB / NZP-CSI-RS) may be configured for each TRP. Therefore, in the CSI reporting configuration of CMRs in the MTRP NCJT CSI configuration, up to 2N CMRs in total may be configured.

[0153] In the CSI-IM configuration, up to N ZP-CSI-RS resources are configured for each TRP. Therefore, in the CSI reporting configuration of ZP-IMR in the MTRP NCJT CSI configuration, up to 2N ZP-CSI-RS resources in total may be configured.

[0154] In the NZP-IM configuration, a maximum of N NZP-CSI-RS resources are configured for each TRP. Therefore, a maximum of 2N NZP-CSI-RS resources may be configured in total as the CSI reporting configuration of the NZP-IMR in the MTRP NCJT CSI configuration.

[0155] Fig. 16 is a diagram showing the relationship between CMR and CSI-IM in option 2-3 of the second embodiment. As shown in Fig. 16, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0 to #7 correspond one-to-one to CSI-IM#a to #h and NZP-IM#A to #H, respectively.

[0156] Fig. 17 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-3 of the second embodiment. Fig. 17 corresponds to Fig. 16. Fig. 17 differs from Fig. 13 in that there are two ZP-IMRs (CSI-IMs) and two NZP-IMs for one CSI pair.

[0157] The UE measures N pairs of CSI from two TRPs assumed for NCJT, where each pair includes the kth CMR associated with each TRP (e.g., the kth CMR and the (k+N)th CMR are paired). For the two CSIs of each pair, the UE may assume a one-to-one mapping between the CMR and CSI-IM / NZP-IM (NZP-CSI-RS for IM).

[0158] After measuring each pair, the UE may report one or more CSI pairs selected for reporting among the pairs. The UE may determine the pair / number of pairs to report based on the specifications or a setting by the RRC, etc. The UE may transmit a CSI report including the CRI shown in the following options 2-3-1 and 2-3-2 for the selected CSI pairs.

[0159] [[Option 2-3-1]] Two CRIs (CRIj and CRIj+N) may correspond to two CSIs with one CSI with the configured (j+1)th CMR and (j+1)th CSI-IM / NZP-IM and the other CSI with the configured (j+1+N)th CMR and (j+1+N)th CSI-IM / NZP-IM.

[0160] [[Option 2-3-2]] One CRI (CRIj) may correspond to two CSIs, one with the configured (j+1)th CMR and (j+1)th CSI-IM / NZP-IM, and the other with the configured (j+1+N)th CMR and (j+1+N)th CSI-IM / NZP-IM. In option 1-3-2, one CRI (CRIj) means two CRIs reporting CRIj and CRIj+N.

[0161] [Option 2-4] In the CMR configuration, up to N CMR (SSB / NZP-CSI-RS) resources may be configured for each TRP. Therefore, in the CSI reporting configuration of CMR (resourcesForChannelMeasurement) in the MTRP NCJT CSI configuration, up to 2N CMRs may exist in total.

[0162] In the CSI-IM configuration, up to N ZP-CSI-RS resources are configured for each TRP. Therefore, in the CSI reporting configuration of ZP-IMR in the MTRP NCJT CSI configuration, up to 2N ZP-CSI-RS resources in total may be configured.

[0163] In the NZP-IM configuration, up to N NZP-CSI-RS resources are configured for each TRP. Therefore, in the CSI reporting configuration of NZP-IMR in the MTRP NCJT CSI configuration, up to 2N NZP-CSI-RS resources in total may be configured.

[0164] FIG. 18 is a diagram showing the relationship between CMR and CSI-IM in option 2-4 of the second embodiment. As shown in FIG. 18, up to four CMRs are set in each of TRP#1 and TRP#2. CMR#0, #4 to #7 correspond to CSI-IM#a and NZP-IM#A, CMR#1, #4 to #7 correspond to CSI-IM#b and NZP-IM#B, CMR#2, #4 to #7 correspond to CSI-IM#c and NZP-IM#C, and CMR#3, #4 to #7 correspond to CSI-IM#d and NZP-IM#D. Furthermore, CMR#4 to #7 correspond one-to-one to CSI-IM#e to #h and NZP-IM#A to #H, respectively. Note that some of the correspondences are omitted from the illustration.

[0165] Fig. 19 is a diagram showing the relationship between a CSI pair, ZP-IMR, and NZP-IMR in option 2-4 of the second embodiment. Fig. 19 corresponds to Fig. 18. As shown in Fig. 19, CMRs corresponding to the same ZP-IMR (CSI-IM) and NZP-IM are set as a CSI pair. Fig. 19 differs from Fig. 15 in that there are two ZP-IMRs (CSI-IMs) and two NZP-IMs for one CSI pair.

[0166] The UE measures N × N pairs of CSI from two TRPs assumed for NCJT, where each pair contains the CMRs associated with each TRP for all possible combinations. For each pair of two CSIs, the UE assumes the k-th CSI-IM / NZP-IM for interference measurement of the k-th CMR.

[0167] For one CSI pair selected for reporting, the UE may report two CRIs, CRIj (j≧0) and CRIp (p≧N), which may correspond to two CSIs, one CSI with the configured (j+1)th CMR and (j+1)th CSI-IM / NZP-IM, and the other CSI with the configured pth CMR and pth CSI-IM / NZP-IM.

[0168] According to the second embodiment, for CSI measurements related to the CSI reporting configuration of NCJT in aperiodic CSI, the mapping between CMR and ZP-IMR / NZP-IMR of two TRPs is made clear.

[0169] <Third embodiment> When applying joint channel state information reporting (joint CSI reporting), the UE receives configuration information (e.g., CSI-ReportConfig) corresponding to both application of channel measurement resources (CMR) for multiple transmission / reception points (multi-TRP) and application of CMR for a single TRP, and controls transmission of a CSI report based on the configuration information. The UE may measure the CMR resource to be measured as a CSI pair of a multi-TRP for an individual single TRP (option 3-1). The UE may receive configuration information in which the IMR to be measured for a single TRP and the IMR to be measured for a multi-TRP (CSI-IM / NZP-IMR) are independently (individually) configured, and may control transmission (generation) of a CSI report based on the configuration information (option 3-2).

[0170] [Option 3-1] When a joint CSI report corresponding to (or including) the best CSI for multi-TRP and the best CSI / second best CSI from each TRP (two TRPs) for single-TRP is configured, the CMR resources measured by the UE as a CSI pair of multi-TRP are measured by the UE for each individual single-TRP hypothesis (which may also be called a premise or assumption).

[0171] In the present disclosure, the CSI pair and the beam pair may be interchangeable. The single TRP may mean that only one TRP of multiple TRPs transmits to the UE, or the single TRP.

[0172] In the present disclosure, when a resource (CMR / CSI-IM / NZP-IMR) is configured before (for example, first) another resource (CMR / CSI-IM / NZP-IMR), it may mean that the index of the resource is smaller than the index of the other resource. When a resource is configured next to (after) another resource, it may mean that the index of the resource is larger than the index of the other resource.

[0173] In the CMR resource configuration, the order of CMR resources from two TRPs is as follows: option 3-1-1 or option 3-1-2.

[0174] [Option 3-1-1] As in the first and second embodiments, a CMR corresponding to TRP#1 may be set first, and then a CMR corresponding to TRP#2 may be set. FIG. 20 is a diagram showing an example of setting the CMR of option 3-1-1 in the third embodiment. As shown in FIG. 20, CMR#0 to #3 correspond to TRP#1, and CMR#4 to #7 correspond to TRP#2. CMR#0 to #3 and CMR#4 to #7 may each correspond to four beams (CSI) of one single TRP. As a CSI pair for multi-TRP, four or sixteen CSI pairs shown in either the first embodiment / second embodiment may be set. That is, CMR#0 to #7 are used for both single-TRP and multi-TRP.

[0175] [Option 3-1-2] CMR may be set in order for each CSI pair. For example, TRP#1 may be set first for each CSI pair, and then TRP#2 may be set. FIG. 21 is a diagram showing an example of setting CMR for option 3-1-2 in the third embodiment. As shown in FIG. 21, CMR#0, #2, #4, #6 correspond to TRP#1, and CMR#1, #3, #5, #7 correspond to TRP#2. CMR#0, #2, #4, #6, CMR#1, #3, #5, #7 may correspond to four beams (CSI) of one single TRP. As CSI pairs for multi-TRP, a pair of CMR#0 and #1, a pair of CMR#2 and #3, a pair of CMR#4 and #5, and a pair of CMR#6 and #7 may be set. That is, CMR#0 to #7 are used for both single-TRP and multi-TRP.

[0176] In the CRI report, the order of the CRI index of the single TRP and the CSI index of the multi-TRP may be swapped. The CRI index may be set, for example, as shown in option 3-1-3 or option 3-1-4, or may be predefined by the specification as shown in these options.

[0177] [Option 3-1-3] The reported CRI k (k≧0) means the CSI of a single TRP based on the (k+1)th CMR resource. The CRI index corresponding to the CSI of a multi-TRP starts from 2N, where N is the number of CMR resources per TRP. In other words, the CSI for a single TRP may correspond to CRI index 0 to 2N-1, and the CSI for a multi-TRP may correspond to CRI index 2N or more. Also, similar to the first and second embodiments, the CRI index j corresponding to a multi-TRP corresponds to two CMR resources as a CSI pair (e.g., the (j+1-2N)th CSI pair).

[0178] For example, CRI#0 to #3 may correspond to TRP#1 (single TRP), CRI#4 to #7 may correspond to TRP#2 (single TRP), and CRI#8 to #11 may correspond to four CSI pairs of multi-TRP.

[0179] [Option 3-1-4] CRI k (k≧0) means the CSI of a multi-TRP with a CSI pair. The CRI index corresponding to a single TRP starts from N. In other words, the CSI for multi-TRP corresponds to CRI index 0 to N-1, and the CSI for multi-TRP may correspond to CRI index N or more.

[0180] For example, CRI#0 to #3 may correspond to four CSI pairs for multi-TRP, CRI#4 to #7 may correspond to TRP#1 (single TRP), and CRI#8 to #11 may correspond to TRP#2 (single TRP).

[0181] [Option 3-2] The IMR resource of the single-TRP hypothesis may be additionally configured and may be TRP-specific. The IMR resource of the single-TRP hypothesis may be different from the IMR resource of the multi-TRP hypothesis. The order of the IMR of the single-TRP hypothesis and the IMR of the multi-TRP hypothesis may be swapped. The one-to-one mapping between the CMR and the IMR of the single-TRP hypothesis is performed, for example, as follows: option 3-2-1 or option 3-2-2.

[0182] [Option 3-2-1] CSI-IM / NZP-IMR corresponding to multi-TRP may be configured first, and then CSI-IM / NZP-IMR corresponding to single-TRP may be configured. Also, for CSI-IM / NZP-IMR, TRP#1 may be configured first, and then TRP#2 may be configured.

[0183] Fig. 22 is a diagram showing a configuration example of CMR / CSI-IM of option 3-2-1 in the third embodiment. Fig. 22 is based on option 1-1 in the first embodiment. Explanation of similarities to option 1-1 will be omitted. In Fig. 22, in the configuration of CSI-IM, first, CSI-IM corresponding to multi-TRP is configured, then CSI-IM corresponding to TRP#1 (for single TRP), and CSI-IM corresponding to TRP#2 (for single TRP) are configured in this order. Note that the configuration of NZP-IMR may be similar to the configuration of CSI-IM.

[0184] [Option 3-2-2] CSI-IM / NZP-IMR corresponding to a single TRP may be configured first, and then CSI-IM / NZP-IMR corresponding to a multi-TRP may be configured. Also, for CSI-IM / NZP-IMR, TRP#1 may be configured first, and then TRP#2 may be configured.

[0185] Fig. 23 is a diagram showing a configuration example of CMR / CSI-IM of option 3-2-2 in the third embodiment. Fig. 23 is based on option 1-1 in the first embodiment. Explanation of the same points as those in option 1-1 will be omitted. In Fig. 23, in the configuration of CSI-IM, first, CSI-IM corresponding to TRP#1 (for single TRP) and CSI-IM corresponding to TRP#2 (for single TRP) are configured in this order, and then CSI-IM corresponding to multi-TRP is configured. Note that the configuration of NZP-IMR may be similar to the configuration of CSI-IM.

[0186] Option 3-2-1 and option 3-2-2 are based on option 1-1 of the first embodiment, but may be based on other options of the first and second embodiments.

[0187] According to the third embodiment, a joint method of measurement / reporting in a multi-panel / TRP-based model and a single-panel / TRP-based model is clarified. In addition, one CMR can be applied to both a multi-panel and a single panel, which reduces the number of settings and improves throughput.

[0188] <Fourth embodiment> When applying joint channel state information reporting (joint CSI reporting), the UE receives configuration information corresponding to both application of channel measurement resources (CMR) for multiple transmission / reception points (multi-TRP) and application of CMR for a single TRP (single-TRP), and controls transmission of a CSI report based on the configuration information. In the configuration information, a CMR resource to be measured for a single TRP and a CMR resource to be measured as a CSI pair for a multi-TRP are configured independently (individually) (option 4-1). The UE may receive configuration information in which an IMR to be measured for a single TRP and an IMR (CSI-IM / NZP-IMR) to be measured for a multi-TRP are configured independently (individually), and control transmission (generation) of a CSI report based on the configuration information (option 4-2).

[0189] [Option 4-1] When a joint CSI report corresponding to (or including) the best CSI for multi-TRP and the best CSI / second best CSI from each TRP (two TRPs) for single-TRP is configured, the CMR resource that the UE measures in the case of the single-TRP hypothesis may be configured independently from the CMR resource that the UE measures as a CSI pair for the multi-TRP hypothesis.

[0190] In CMR resource configuration, the order of single-TRP CMRs and multi-TRP CMRs may be swapped.

[0191] [Option 4-1-1] First, the multi-TRP CMR (N beam pairs) may be set, and then the single-TRP CMR (M per TRP) may be set. M and N may be set, for example, by higher layer signaling.

[0192] FIG. 24 is a diagram showing a first setting example of CMR of option 4-1-1 in the fourth embodiment. As shown in FIG. 24, CMR#0 to #3 correspond to TRP#1 (for multi-TRP), and CMR#4 to #7 correspond to TRP#2 (for multi-TRP). As a CSI pair for multi-TRP, 4 or 16 CSI pairs shown in any of the options of the first embodiment / second embodiment may be set. Next, CMR#a, #b corresponding to the two beams (CSI) of TRP#1 (for single TRP) are set, and then CMR#c, #d corresponding to the two beams (CSI) of TRP#2 (for single TRP) are set.

[0193] FIG. 25 is a diagram showing a second setting example of CMR of option 4-1-1 in the fourth embodiment. As shown in FIG. 25, CMR#0, #2, #4, #6 correspond to TRP#1 (for multi-TRP), and CMR#1, #3, #5, #7 correspond to TRP#2 (for multi-TRP). As CSI pairs for multi-TRP, a pair of CMR#0 and #1, a pair of CMR#2 and #3, a pair of CMR#4 and #5, and a pair of CMR#6 and #7 may be set. Next, CMR#a, #b corresponding to the two beams (CSI) of TRP#1 (for single TRP) are set, and then CMR#c, #d corresponding to the two beams (CSI) of TRP#2 (for single TRP) are set.

[0194] [Option 4-1-2] First, a single-TRP CMR (M beam pairs per TRP) may be set, and then a multi-TRP CMR (N beam pairs) may be set. M and N may be set, for example, by higher layer signaling.

[0195] Fig. 26 is a diagram showing a first setting example of the CMR of option 4-1-2 in the fourth embodiment. Fig. 26 is the same as the example of Fig. 24 except that the order of CMR#0 to #7 (for multi-TRP) and CMR#a to #d (for single-TRP) is interchanged, and detailed description is omitted.

[0196] Fig. 27 is a diagram showing a second setting example of the CMR of option 4-1-2 in the fourth embodiment. Fig. 27 is the same as the example of Fig. 25 except that the order of CMR#0 to #7 (for multi-TRP) and CMR#a to #d (for single-TRP) is interchanged, and detailed description is omitted.

[0197] In the CRI report, the order of the CRI index of the single TRP and the CSI index of the multi-TRP may be swapped. The CRI index may be set, for example, as shown in option 4-1-3 or option 4-1-4 below, or may be predefined by the specification as shown in these options.

[0198] [Option 4-1-3] CRI k (k≧0) corresponds to the (k+1)th CSI pair. The CRI for TRP#1 starts from 2N, and the CRI for TRP#2 starts from 2N+M, where N is the number of CMR resources per TRP. In other words, CSI for multi-TRP may correspond to CRI index 0 to N-1, and CSI for single-TRP may correspond to CRI index 2N or more.

[0199] [Option 4-1-4] CRI k (k≧0) corresponds to TRP#1 (single TRP), CRI for TRP#2 (single TRP) starts from M, and CRI for multi-TRP starts from 2M. In other words, CSI for single TRP may correspond to CRI index 0 to M−1, and CSI for multi-TRP may correspond to CRI index 2M or more.

[0200] [Option 4-2] The IMR resources of the single-TRP hypothesis may be additionally configured and may be TRP-specific. The IMR resources of the single-TRP hypothesis may be different from the IMR resources of the multi-TRP hypothesis. The order of the IMRs of the single-TRP and the multi-TRP may be swapped. However, the order of the IMR resources is the same as the order of the CMRs corresponding to the single-TRP and the multi-TRP. The one-to-one mapping between the CMRs and the IMRs of the single-TRP hypothesis is performed, for example, as in the following option 4-2-1 or option 4-2-2.

[0201] [Option 4-2-1] CSI-IM / NZP-IMR corresponding to multi-TRP may be configured first, and then CSI-IM / NZP-IMR corresponding to single-TRP may be configured. Also, for CSI-IM / NZP-IMR, TRP#1 may be configured first, and then TRP#2 may be configured.

[0202] FIG. 28 is a diagram showing a configuration example of CMR / CSI-IM of option 4-2-1 in the fourth embodiment. FIG. 28 is based on option 1-1 in the first embodiment. Explanation of the same points as those in option 1-1 will be omitted. In FIG. 28, the CRM configuration is the same as FIG. 24. In the CSI-IM configuration, the CSI-IM corresponding to multi-TRP is configured first, followed by the CSI-IM corresponding to TRP#1 (for single TRP) and the CSI-IM corresponding to TRP#2 (for single TRP). Note that the NZP-IMR configuration may also be the same as the CSI-IM configuration.

[0203] [Option 4-2-2] CSI-IM / NZP-IMR corresponding to a single TRP may be configured first, and then CSI-IM / NZP-IMR corresponding to a multi-TRP may be configured. Also, for CSI-IM / NZP-IMR, TRP#1 may be configured first, and then TRP#2 may be configured.

[0204] FIG. 29 is a diagram showing a configuration example of CMR / CSI-IM of option 4-2-2 in the fourth embodiment. FIG. 29 is based on option 1-1 in the first embodiment. Explanation of the same points as option 1-1 will be omitted. In FIG. 29, the CRM configuration is the same as FIG. 26. In the CSI-IM configuration, first, the CSI-IM corresponding to TRP#1 (for single TRP) and the CSI-IM corresponding to TRP#2 (for single TRP) are configured in this order, and then the CSI-IM corresponding to multi-TRP is configured. Note that the NZP-IMR configuration may also be the same as the CSI-IM configuration.

[0205] Option 4-2-1 and option 4-2-2 are based on option 1-1 of the first embodiment, but may be based on other options of the first and second embodiments.

[0206] According to the third embodiment, a joint method of measurement / reporting in a multi-panel / TRP model and in a single-panel / TRP model is disclosed.

[0207] <Fifth embodiment> When a joint CSI report corresponding to (or including) the best CSI for multi-TRP and the best CSI / second best CSI from each TRP (two TRPs) for single-TRP is configured, the CMR resources measured by the UE as a CSI pair of multi-TRP are measured by the UE for each individual single-TRP hypothesis (which may also be called a premise or assumption).

[0208] Also, the UE may assume both assumptions for multi-TRP and single-TRP for IMR resources. In other words, the IMR resources may be commonly used for both multi-TRP measurements and single-TRP measurements. Independent CMR / IMR settings for single-TRP and multi-TRP are not performed. However, the UE measurement operations for single-TRP and multi-TRP are different. In this embodiment, an example of Option 3-1 may be applied to CMR resource settings and CRI reports. For the assumptions of IMR measurements, the following Options 5-1 and 5-2 may be applied.

[0209] [Option 5-1] The UE may assume that CSI-IM (ZP-IMR) means interference outside both TRPs (interference from sources other than both TRPs). This corresponds to the interference for the multi-TRP assumption. When the UE derives the CSI of a single-TRP, the UE may recalculate the interference from other TRPs and add it to the interference from sources other than the above two TRPs for use.

[0210] [Option 5-2] The UE may assume that the CSI-IM (ZP-IMR) associated with each TRP means interference outside the corresponding TRP (interference from sources other than the corresponding TRP). This corresponds to the interference for the single-TRP assumption. Next, when the UE derives the CSI of multi-TRP, the UE may recalculate the interference from other TRPs and subtract it from the interference from sources other than the above corresponding TRP for use.

[0211] <UE capability> The UE may transmit (report) at least one of the following (1) to (11) to the base station as UE capability (UE capability information).

[0212] (1) Whether to support CMR from different TRPs in CSI settings. (2) In the CSI setting, whether to support CSI-IM resources (ZP-IMR) / NZP-CSI-RS resources (NZP-IMR) for interference measurement of different TRPs. (3) Whether to support one or two CRIs for a CSI pair with two CSIs for MTRP NCJT CSI reporting. (4) In periodic / semi-persistent / non-periodic CSI, whether to support interference measurement of one TRP based on CMR from the other TRP. (5) Whether the UE supports assuming the calculated precoding applied to the CMR when measuring interference based on the CMR. (6) In CSI reporting, whether to support reporting of both one best CSI for a single TRP and one best CSI for a multi-TRP. (7) In CSI reporting, whether to support reporting of two best CSIs for a single TRP (one CSI per TRP) and one best CSI for a multi-TRP. (8) In CSI reporting, whether to support reporting of the two best CSIs for a single TRP (one CSI per TRP). (9) In CSI reporting, whether to support reporting one CSI (selected by the UE) from the best CSI of single-TRP and the best CSI of multi-TRP. (10) Whether to support independent / separate CMR resource configuration for single-TRP and multi-TRP scenarios. (11) Whether to support independent / separate IMR (CSI-IM / NZP-IM) resource configuration for single-TRP and multi-TRP scenarios.

[0213] (Wireless communication systems) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these methods.

[0214] 30 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), or the like, which are specified by the Third Generation Partnership Project (3GPP).

[0215] Furthermore, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like.

[0216] In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (MN) and the NR base station (gNB) is the secondary node (SN). In NE-DC, the NR base station (gNB) is the MN and the LTE (E-UTRA) base station (eNB) is the SN.

[0217] The wireless communication system 1 may support dual connectivity between multiple base stations in the same RAT (for example, dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).

[0218] The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as a base station 10.

[0219] The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0220] Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.

[0221] Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0222] The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node.

[0223] The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

[0224] The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G.

[0225] In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

[0226] The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (for example, other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes.

[0227] In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as a downlink channel.

[0228] In addition, in the wireless communication system 1, 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.

[0229] The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB).

[0230] Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH.

[0231] In addition, DCI for scheduling PDSCH may be called DL assignment, DL DCI, etc., and DCI for scheduling PUSCH may be called UL grant, UL DCI, etc. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

[0232] A control resource set (CORESET) and a search space may be used to detect the PDCCH. The CORESET corresponds to resources to search for DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor a CORESET associated with a certain search space based on the search space configuration.

[0233] One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," and "CORESET setting" in the present disclosure may be read as interchangeable terms.

[0234] The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery acknowledgement information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell.

[0235] In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels.

[0236] In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.

[0237] The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including the SS (PSS, SSS) and the PBCH (and the DMRS for the PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal.

[0238] Furthermore, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), etc. may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal).

[0239] (base station) 31 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may be provided.

[0240] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0241] The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0242] The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc.

[0243] 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 configured with 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 the present disclosure.

[0244] The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 1211 and an RF unit 122. The receiving unit may be configured from a reception processing unit 1212, an RF unit 122, and a measurement unit 123.

[0245] The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which the present disclosure pertains, such as an array antenna.

[0246] The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.

[0247] The transceiver 120 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0248] The transceiver 120 (transmission processing unit 1211) 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.

[0249] The transceiver 120 (transmission processing unit 1211) 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.

[0250] The transceiver unit 120 (RF unit 122) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna .

[0251] On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna .

[0252] The transceiver 120 (reception processing unit 1212) 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.

[0253] The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, 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. The measurement results may be output to the control unit 110.

[0254] The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and may acquire and transmit user data (user plane data) for the user terminal 20, control plane data, etc.

[0255] The transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140.

[0256] In addition, when applying a joint channel state information report, the transceiver unit 120 may transmit configuration information corresponding to both the application of channel measurement resources of multiple transmission / reception points and the application of channel measurement resources of a single transmission / reception point, and receive a channel state information report transmitted based on the configuration information.

[0257] (User terminal) 32 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Note that the user terminal 20 may include one or more of each of the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230.

[0258] In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the user terminal 20 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted.

[0259] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured with a controller, a control circuit, and the like that are explained based on common understanding in the technical field to which the present disclosure relates.

[0260] The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / 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 / reception unit 220.

[0261] The transmitting / receiving 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 transmitting / receiving unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting / receiving circuit, and the like, which are described based on common understanding in the technical field related to the present disclosure.

[0262] The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 2211 and an RF unit 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.

[0263] The transmitting / receiving antenna 230 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.

[0264] The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.

[0265] The transceiver 220 may form at least one of a transmission beam and a reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

[0266] The transceiver unit 220 (transmission processing unit 2211) 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.

[0267] The transceiver 220 (transmission processing unit 2211) 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 sequence to be transmitted, and output a baseband signal.

[0268] Whether or not to apply the DFT process may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (e.g., PUSCH), the transceiver 220 (transmission processor 2211) may perform the DFT process as the transmission process to transmit the channel using a DFT-s-OFDM waveform, and may not perform the DFT process as the transmission process if transform precoding is enabled for the channel.

[0269] The transceiver unit 220 (RF unit 222) may perform modulation to a radio frequency band, filtering, amplification, and the like on the baseband signal, and transmit the radio frequency band signal via the transceiver antenna 230.

[0270] On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 230.

[0271] The transceiver 220 (reception processing unit 2212) 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, and acquire user data, etc.

[0272] The transceiver 220 (measurement unit 223) 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.

[0273] In addition, the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230.

[0274] The control unit 210 may determine a first interference measurement resource corresponding to the first transmission / reception point or a second interference measurement resource corresponding to the second transmission / reception point based on at least one of a first channel measurement resource corresponding to the first transmission / reception point and a second channel measurement resource corresponding to the second transmission / reception point. When a specific upper layer parameter is set, the control unit 210 may determine the first interference measurement resource of non-zero power based on the second channel measurement resource.

[0275] When applying joint channel state information reporting, the transceiver unit 220 may receive configuration information corresponding to both application of resources for channel measurement of multiple transmission / reception points and application of resources for channel measurement of a single transmission / reception point.

[0276] The control unit 210 may control transmission of the channel state information report based on the setting information. The control unit 210 may measure channel measurement resources to be measured as channel state information pairs of the multiple transmission and reception points for each of the single transmission and reception points.

[0277] In the configuration information, a channel measurement resource to be measured for the single transmitting / receiving point and a channel measurement resource to be measured as a channel state information pair of the multiple transmitting / receiving points may be configured independently.

[0278] In the configuration information, an interference measurement resource to be measured for the single transmitting / receiving point and an interference measurement resource to be measured as a channel state information pair of the multiple transmitting / receiving points may be configured independently.

[0279] (Hardware configuration) The block diagrams used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically combined, or may be realized by using two or more devices that are physically or logically separated and directly or indirectly connected (for example, by wire, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0280] Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, and the like. In either case, as described above, the method of realization is not particularly limited.

[0281] For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 33 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0282] In this disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices.

[0283] For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processes may be performed by one processor, or the processes may be performed by two or more processors simultaneously, sequentially, or in other manners. Also, the processor 1001 may be implemented by one or more chips.

[0284] Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specific software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of reading and writing of data in the memory 1002 and the storage 1003.

[0285] The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001.

[0286] Moreover, the processor 1001 reads out programs (program codes), 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 according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and the other functional blocks may be realized in a similar manner.

[0287] The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory (primary storage device), and the like. The memory 1002 can store a program (program code), a software module, and the like that is executable to implement a wireless communication method according to an embodiment of the present disclosure.

[0288] Storage 1003 is a computer-readable recording medium and may be constituted by at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (e.g., Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, stick, 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.

[0289] The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission / reception unit 120 (220), transmission / reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission / reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated.

[0290] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0291] In addition, each device such as the processor 1001 and the 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.

[0292] Furthermore, the base station 10 and the 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), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0293] (Modification) In addition, the terms explained in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may also be abbreviated as RS, and may also be called a pilot, pilot signal, etc. depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, etc.

[0294] A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0295] Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, a subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame structure, a specific filtering process performed by a transceiver in the frequency domain, and a specific windowing process performed by a transceiver in the time domain.

[0296] A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol, a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. A slot may also be a time unit based on numerology.

[0297] A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.

[0298] A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other.

[0299] For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.

[0300] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

[0301] The TTI may be a transmission time unit for a channel-encoded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI.

[0302] In addition, when one slot or one minislot is called TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled.

[0303] A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc.

[0304] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.

[0305] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0306] In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one minislot, one subframe, or one TTI. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks.

[0307] In addition, one or more RBs may be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0308] Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol.

[0309] A Bandwidth Part (BWP), which may also be referred to as a fractional bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a common reference point of the carrier. PRBs may be defined in a BWP and numbered within the BWP.

[0310] The BWP may include a UL BWP (a BWP for UL) and a DL BWP (a BWP for DL). One or more BWPs may be configured for a UE within one carrier.

[0311] At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP".

[0312] The above-mentioned structures of radio frames, subframes, slots, minislots, and symbols are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

[0313] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index.

[0314] The names used for parameters and the like in this disclosure are not limiting in any way. Furthermore, the 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.

[0315] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0316] Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via a plurality of network nodes.

[0317] Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.

[0318] The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof.

[0319] The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, by using a MAC Control Element (CE).

[0320] Furthermore, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information).

[0321] 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 by comparing numerical values ​​(e.g., with a predetermined value).

[0322] Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0323] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0324] As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations).

[0325] In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably.

[0326] In this disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0327] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0328] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0329] 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.

[0330] At least one of the base station and the mobile station may be called 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 body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

[0331] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D) or Vehicle-to-Everything (V2X)). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel.

[0332] Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0333] In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. It is clear that in a network including one or more network nodes having base stations, 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) and a Serving-Gateway (S-GW)), or a combination thereof.

[0334] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0335] Each aspect / embodiment described in the present disclosure may be implemented using any of a wide variety of standards, including Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), other appropriate wireless communication methods, next-generation systems that are based on these, etc. Also, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G).

[0336] As used in this disclosure, 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."

[0337] Any reference to an element using a designation such as "first," "second," etc., used in this disclosure 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 precede the second element in some way.

[0338] The term "determining" as used in this disclosure 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., looking up in a table, database, or another data structure), ascertaining, and the like.

[0339] A "determining" may also be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.

[0340] Also, "determination" may be considered to be "deciding" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "deciding" to perform some action.

[0341] Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc.

[0342] As used in this disclosure, the terms "connected," "coupled," or any variation thereof, refer to 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 the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "access."

[0343] In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples.

[0344] In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different."

[0345] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0346] In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0347] Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure.

Claims

1. A transmitter that transmits capability information indicating whether reporting of channel state information (CSI) of a single transmission / reception point (single-TRP) and CSI of multiple transmission / reception points (multi-TRP) is supported; A receiving unit that receives configuration information corresponding to both a channel measurement resource (CMR) of the multi-TRP and a CMR of the single-TRP; A control unit that controls transmission of CSI reports based on the setting information, The CMR of the multi-TRP and the Channel State Information-Interference Management (CSI-IM) resource for interference measurement of the multi-TRP are Quasi-Co-Location (QCL) for each resource. Terminal.

2. In the configuration information, the CSI-IM resources for the single TRP are configured first, and then the CSI-IM resources for the multi-TRP are configured. The terminal according to claim 1.

3. The first one or more CSI-Reference Signal Resource Indicator (CRI) indices in the CSI report correspond to a single-TRP, and the next one or more CRI indices correspond to a multi-TRP. The terminal according to claim 1.

4. A step of transmitting capability information indicating whether reporting of channel state information (CSI) of a single transmission / reception point (single-TRP) and CSI of multiple transmission / reception points (multi-TRP) is supported; receiving configuration information corresponding to both a channel measurement resource (CMR) of the multi-TRP and a CMR of the single-TRP; and controlling transmission of CSI reports based on the configuration information. The CMR of the multi-TRP and the Channel State Information-Interference Management (CSI-IM) resource for interference measurement of the multi-TRP are Quasi-Co-Location (QCL) for each resource. The wireless communication method of the terminal.

5. A receiver for receiving capability information indicating whether reporting of channel state information (CSI) for a single transmission / reception point (single-TRP) and CSI for multiple transmission / reception points (multi-TRP) is supported; A transmitting unit that transmits configuration information corresponding to both a channel measurement resource (CMR) of the multi-TRP and a CMR of the single-TRP; A control unit that controls reception of a CSI report transmitted based on the setting information, The CMR of the multi-TRP and the Channel State Information-Interference Management (CSI-IM) resource for interference measurement of the multi-TRP are Quasi-Co-Location (QCL) for each resource. Base station.

6. A system including a terminal and a base station, The terminal includes: A transmitter for transmitting capability information indicating whether reporting of both channel state information (CSI) of a single transmission / reception point (single-TRP) and CSI of multiple transmission / reception points (multi-TRP) is supported; A receiving unit that receives configuration information corresponding to both a channel measurement resource (CMR) of the multi-TRP and a CMR of the single-TRP; A control unit that controls transmission of CSI reports based on the setting information, The CMR of the multi-TRP and the Channel State Information-Interference Management (CSI-IM) resource for interference measurement of the multi-TRP are Quasi-Co-Location (QCL) for each resource; The base station, A control unit for controlling reception of the CSI report system.

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