Terminal, wireless communication method, and base station

Abstract

A terminal according to one embodiment of the present disclosure includes a reception unit that receives at least one setting for measurement and reporting of channel state information (CSI) for a plurality of transmission and reception points, and a control unit that performs measurement and reporting of the CSI based on the setting. According to one embodiment of the present disclosure, measurement and reporting of the CSI for a multi-panel / TRP can be appropriately performed.

Description

Technical Field

[0001] This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems. Background Technology

[0002] In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) was standardized with the aim of further increasing data rates and reducing latency (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) was standardized with the aim of further increasing capacity and height in LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

[0003] The development of successor systems to LTE is also underway (e.g., also known as the 5th generation mobile communication system (5G), 5G+, New Radio (NR), 3GPP Rel.15 and later, etc.).

[0004] Existing technical documents

[0005] Non-patent literature

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

[0007] The problem that the invention aims to solve

[0008] In future wireless communication systems (such as NR), research is underway on how user terminals (User Equipment (UE)) can control transmission and reception processes based on information related to quasi-co-location (QCL).

[0009] In addition, in NR, research is underway on one or more Transmission / Reception Points (TRPs) (multiple TRPs) using one or more panels (multiple panels) to perform DL transmission (e.g., PDSCH transmission) to the UE.

[0010] However, the current NR specifications do not consider multi-panel / TRP, so how to measure and report CSI when using multi-panel / TRP is not obvious. If CSI measurement and reporting are not performed properly, there are concerns about reduced system performance, such as decreased throughput.

[0011] Therefore, one of the purposes of this disclosure is to provide a terminal, wireless communication method, and base station for properly measuring and reporting CSI for multi-panel / TRP.

[0012] Methods for solving problems

[0013] One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives at least one setting for measuring and reporting channel state information (CSI) for a plurality of transmit and receive points; and a control unit that performs CSI measurement and reporting based on the setting.

[0014] Invention Effects

[0015] According to one method disclosed herein, it is possible to properly measure and report the CSI of multi-panel / TRP. Attached Figure Description

[0016] Figure 1 This is a diagram illustrating an example of CSI report settings in Rel.15NR.

[0017] Figures 2A-2D This is a diagram illustrating an example of PDSCH transmission using multiple TRPs.

[0018] Figure 3 This is a diagram illustrating an example of the CSI report settings involved in Implementation 1.

[0019] Figure 4 This is a diagram illustrating the first example of the structure set up in a CSI report.

[0020] Figure 5 This is a diagram illustrating the second example of the structure set in the CSI report.

[0021] Figure 6 This is a diagram representing the third example of the structure set in the CSI report.

[0022] Figure 7This is a diagram illustrating an example of the CSI report settings involved in interference premise association 1 of implementation methods 1-2.

[0023] Figure 8 This is a diagram illustrating an example of the setting of CSI report #1 for TRP#1 related to interference premise association 1 in implementation methods 1-2.

[0024] Figure 9 This is a diagram illustrating an example of the setting of CSI report #2 for TRP#2 related to interference premise association 1 in implementation methods 1-2.

[0025] Figure 10A And 10B is a diagram representing an example of the CSI report setting involved in the interference premise association 2 of implementation methods 1-2.

[0026] Figure 11 This is a diagram illustrating an example of the CSI field involved in the interference premise association 2 of implementation methods 1-2.

[0027] Figure 12 This is a diagram illustrating another example of the CSI field involved in the interference premise association 2 of implementation methods 1-2.

[0028] Figure 13 This is a diagram illustrating an example of the setting of CSI report #1 for TRP#1 related to interference premise association 2 in implementation methods 1-2.

[0029] Figure 14 This is a diagram illustrating an example of the setting of CSI report #2 for TRP#2 related to interference premise association 2 in implementation methods 1-2.

[0030] Figure 15 This is a diagram illustrating an example of the CSI report settings involved in Implementation Method 2-1.

[0031] Figure 16 This is a diagram illustrating an example of the CSI report settings involved in Interference Prerequisite Association 1 of Implementation Method 2-2.

[0032] Figure 17 This is a diagram illustrating an example of the CSI field involved in the interference premise association 1 of implementation method 2-2.

[0033] Figure 18 This is a diagram illustrating another example of the CSI field involved in the interference premise association 1 of implementation method 2-2.

[0034] Figure 19 This is a diagram illustrating an example of the setting of CSI report #1 for interference premise #1 related to interference premise association 1 in implementation method 2-2.

[0035] Figure 20 This is a diagram illustrating an example of the setting of CSI report #2 for interference premise #2 related to interference premise association 1 in implementation method 2-2.

[0036] Figure 21 This is a diagram illustrating an example of the CSI report settings involved in Interference Prerequisite Association 1 of Implementation Method 2-2.

[0037] Figure 22 This is a diagram illustrating an example of the setting of interference condition #1 in the CSI report #1 related to interference condition association 2 in implementation method 2-2.

[0038] Figure 23 This is a diagram illustrating an example of the setting of interference condition #2 in the CSI report #1 related to interference condition association 2 in implementation method 2-2.

[0039] Figure 24 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment.

[0040] Figure 25 This is a diagram illustrating an example of the structure of a base station according to one embodiment.

[0041] Figure 26 This is a diagram illustrating an example of the structure of a user terminal according to one embodiment.

[0042] Figure 27 This is a diagram illustrating an example of the hardware structure of a base station and a user terminal according to one embodiment. Detailed Implementation

[0043] (CSI report (or reporting))

[0044] In Rel.15NR, a terminal (also known as a user terminal, user equipment (UE), etc.) generates (also known as deciding, calculating, estimating, measuring, etc.) Channel State Information (CSI) based on a Reference Signal (RS) (or the resources used by the RS) and sends the generated CSI to the network (e.g., a base station) (also known as reporting, feedback, etc.). This CSI can also be sent to the base station, for example, using an uplink control channel (e.g., the Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., the Physical Uplink Shared Channel (PUSCH)).

[0045] The RS used in the generation of CSI can be at least one of the following: Channel State Information Reference Signal (CSI-RS), Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, Synchronization Signal (SS), Demodulation Reference Signal (DMRS), etc.

[0046] CSI-RS can also include at least one of Non-Zero Power (NZP) CSI-RS and CSI-Interference Management (CSI-IM). An SS / PBCH block is a block containing SS and PBCH (and their corresponding DMRS), and can also be called an SS block (SSB), etc. Furthermore, SS can also include at least one of Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS).

[0047] CSI may also include at least one of the following parameters (CSI parameters): Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SS / PBCH Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal-to-Noise and Interference Ratio or Signal to Interference plus Noise Ratio), and L1-SNR (SNR) (Signal to Noise Ratio).

[0048] The UE can also receive information related to CSI reports (report configuration information) and control CSI reports based on this report configuration information. This report configuration information can be, for example, the "CSI-ReportConfig" of the Radio Resource Control (RRC) Information Element (IE). Additionally, in this disclosure, the RRC IE can also be referred to as RRC parameters, higher-layer parameters, etc.

[0049] The report configuration information (e.g., “CSI-ReportConfig” in RRC IE) may also include at least one of the following.

[0050] • Information related to the type of CSI report (report type information, such as “reportConfigType” in RRC IE)

[0051] • Information relating to one or more quantities of CSI that need to be reported (more than one CSI parameter) (report quantity information, e.g., "reportQuantity" in RRC IE)

[0052] • Information related to the RS resources used in the generation of this quantity (the CSI parameter) (resource information, such as "CSI-ResourceConfigId" in RRC IE).

[0053] • Information related to the frequency domain of the object being reported by CSI (frequency domain information, such as RRC IE's "reportFreqConfiguration")

[0054] For example, report type information can also indicate periodic CSI (P-CSI) reports, aperiodic CSI (A-CSI) reports, or semi-permanent CSI (SP-CSI) reports.

[0055] In addition, the reporting volume information can also specify at least one combination of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.).

[0056] In addition, resource information can also be the ID of an RS resource. This RS resource may, for example, include a non-zero power CSI-RS resource or SSB, as well as a CSI-IM resource (e.g., a zero power CSI-RS resource).

[0057] Furthermore, frequency domain information can also represent the frequency granularity of CSI reports. This frequency granularity can include, for example, bandwidth and sub-band domains. Bandwidth is the entire CSI reporting band. Bandwidth can be either the entirety of a certain carrier (component carrier (CC)), cell, serving cell) or the entirety of the bandwidth part (BWP) within a carrier. Bandwidth can also be referred to as the CSI reporting band, the entire CSI reporting band, etc.

[0058] Furthermore, a subband domain is a part of the bandwidth and can consist of more than one Resource Block (RB) or Physical Resource Block (PRB). The size of a subband domain can also be determined accordingly to the size of the BWP (number of PRBs).

[0059] Frequency domain information can also indicate which PMI in the wideband or subband domain is being reported (frequency domain information may also include, for example, the "pmi-FormatIndicator" of the RRC IE used in determining either the wideband PMI report or the subband PMI report). The UE can also determine the frequency granularity of the CSI report (i.e., either the wideband PMI report or the subband PMI report) based on at least one of the above reporting quantity information and frequency domain information.

[0060] When a wideband PMI report is set (determined), a single wideband PMI can be reported for the entire CSI report band domain. On the other hand, when a subband PMI report is set, a single wideband indication i1 can be reported for the entire CSI report band domain, and one subband indication i2 (e.g., subband indication of each subband domain) can be reported for each of the more than one subband domains within that CSI report domain.

[0061] The UE uses the received RS to perform channel estimation and estimates the channel matrix H. The UE then feeds back an index (PMI) determined based on the estimated channel matrix.

[0062] PMI can also represent a precoder matrix (also simply called a precoder) that the UE considers suitable for use in downlink (DL) transmissions for the UE. Each value of PMI can also correspond to a precoder matrix. The set of PMI values ​​can also correspond to a set of different precoder matrices called a precoder codebook (also simply called a codebook).

[0063] In the space domain, a CSI report may contain more than one type of CSI. For example, the CSI may include at least one of a first type (Type 1 CSI) used in single-beam selection and a second type (Type 2 CSI) used in multi-beam selection. Single-beam may also be referred to as a single layer, and multi-beam may be referred to as multiple beams. Furthermore, Type 1 CSI may not assume multiple-user multiple-input multiple-output (MIMO), while Type 2 CSI may assume multi-user MIMO.

[0064] The codebook mentioned above may also include a codebook for Type 1 CSI (also known as Type 1 codebook, etc.) and a codebook for Type 2 CSI (also known as Type 2 codebook, etc.). In addition, Type 1 CSI may include Type 1 single-panel CSI and Type 1 multi-panel CSI, or may specify different codebooks (Type 1 single-panel codebook, Type 1 multi-panel codebook).

[0065] In this disclosure, Type 1 and Type I can be substituted for each other. In this disclosure, Type 2 and Type II can also be substituted for each other.

[0066] The uplink control information (UCI) type may also include at least one of the following: Hybrid Automatic Repeat reQuest ACK knowledgement (HARQ-ACK), scheduling request (SR), and CSI. UCI can be transmitted via either PUCCH or PUSCH.

[0067] In Rel.15NR, the UCI can include a CSI section for broadband PMI feedback. The CSI report #n includes PMI broadband information if reported.

[0068] In Rel.15NR, the UCI can include two CSI parts for subband domain PMI feedback. CSI part 1 contains wideband PMI information. CSI part 2 contains wideband PMI information and some subband domain PMI information. CSI part 1 and CSI part 2 are encoded separately.

[0069] In Rel.15NR, the UE has report settings configured by N (N≥1) CSI reports and resource settings configured by M (M≥1) CSI resources, as configured by higher layers. For example, ... Figure 1As shown, the CSI report 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 report quantity. The resource settings for channel measurement, CSI-IM, and NZP-CSI-RS are each associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource setting contains a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set).

[0070] When interference measurements are performed within CSI-IM, each CSI-RS resource used for channel measurement is associated with a CSI-IM resource in the order of the CSI-RS resources and CSI-IM resources within the corresponding resource set. The number of CSI-RS resources used for channel measurement is equal to the number of CSI-IM resources.

[0071] In other words, for CSI-IM-based interference measurement, the channel measurement resource (CMR) and the interference measurement resource (IMR) are mapped one-to-one.

[0072] If the UE is configured with a CSI reporting setting having a reporting quantity (higher-layer parameter reportQuantity) set to 'cri-RSRP', 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI', and K is set in the corresponding resource set used for channel measurement... S (K SIn the case of >1) resources, the UE will use the reported CRI as a condition to derive CSI parameters other than the CRI. CSIk (k≥0) corresponds to the (k+1)th set of the associated NZP-CSI-RS resource (nzp-CSI-RSResource) in the corresponding NZP-CSI-RS resource set (nzp-CSI-RS-ResourceSet) used for channel measurement, and the (k+1)th set of the associated CSI-IM resource (csi-IM-Resource) in the CSI-IM resource set (csi-IM-ResourceSet) if it is set.

[0073] In other words, CSIk corresponds to the (k+1)th CMR and the (k+1)th IMR that are set.

[0074] Taking FR1 and FR2 as examples, in order to achieve more dynamic channel / interference hypotheses for NCJT, the evaluation and specification of CSI reports for transmission of at least one of the multiple TRPs and multiple panels in DL are being studied.

[0075] (Multiple TRPs)

[0076] In NR, research is underway on using one or more Transmission / Reception Points (TRPs) (multiple TRPs) with one or more panels (multiple panels) to perform DL (deep-level) transmissions to the UE. Additionally, research is underway on UL (ultimate-level) transmissions by the UE to one or more TRPs.

[0077] Furthermore, multiple TRPs can correspond to the same cell identifier (cell Identifier(ID)) or different cell IDs. This cell ID can be either a physical cell ID or a virtual cell ID.

[0078] Figures 2A-2D This is a diagram illustrating an example of a multi-TRP scenario. In these examples, it is assumed that each TRP can transmit four different beams, but it is not limited to this.

[0079] Figure 2A This refers to a scenario where only one TRP (TRP1 in this example) transmits data to the UE out of multiple TRPs (also known as single-mode, single TRP, etc.). In this case, TRP1 transmits both control signals (PDCCH) and data signals (PDSCH) to the UE.

[0080] Figure 2BThis refers to a scenario where only one of the multiple TRPs (TRP1 in this example) sends control signals to the UE, while the multiple TRPs also send data signals (also known as single-master mode). The UE receives each PDSCH sent from the multiple TRPs based on a downlink control information (DCI).

[0081] Figure 2C This illustrates an example of a scenario where multiple TRPs each transmit a portion of the control signal to the UE, and these multiple TRPs also transmit data signals (also known as master-slave mode). Alternatively, TRP1 may transmit portion 1 of the control signal (DCI), while TRP2 may transmit portion 2 of the control signal (DCI). Portion 2 of the control signal may also depend on portion 1. The UE receives each PDSCH transmitted from the multiple TRPs based on these portions of the DCI.

[0082] Figure 2D This illustrates an example of a scenario where multiple TRPs each send separate control signals to the UE, and these multiple TRPs also send data signals (also known as multi-master mode). Alternatively, TRP1 may send the first control signal (DCI), while TRP2 may send the second control signal (DCI). Based on these DCIs, the UE receives the PDSCHs sent from the multiple TRPs.

[0083] exist Figure 2B In cases where a single DCI schedules multiple PDSCHs (also known as multiple PDSCHs) from multiple TRPs, this DCI can also be called a single DCI (S-DCI, single PDCCH). Furthermore, in Figure 2D In the case where multiple DCIs are used to schedule multiple PDSCHs from multiple TRPs, these multiple DCIs can also be called multiple DCIs (M-DCI, multiple PDCCH).

[0084] It is also possible to send different codewords (CWs) and different layers from each TRP in a multi-TRP system. As a method of multi-TRP transmission, non-coherent joint transmission (NCJT) is being investigated.

[0085] In NCJT, for example, TRP1 performs modulation mapping on the first codeword and layer mapping, and transmits the first PDSCH using the first precoding for a first number of layers (e.g., 2 layers). Furthermore, TRP2 performs modulation mapping on the second codeword and layer mapping, and transmits the second PDSCH using the second precoding for a second number of layers (e.g., 2 layers).

[0086] Furthermore, multiple PDSCHs (multiple PDSCHs) of NCJT can also be defined as partially or completely repeated with respect to at least one of the time domain and frequency domain. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP can also be repeated in at least one of the time and frequency resources.

[0087] The first and second PDSCHs mentioned above can also be conceived as not being in a quasi-co-located relationship (QCL). The reception of multiple PDSCHs can also be replaced by the simultaneous reception of PDSCHs that are not of a certain QCL type (e.g., QCL type D).

[0088] In URLLC for multiple TRPs, support for PDSCH (Transport Block (TB) or Codeword (CW)) repetition across multiple TRPs is being investigated. Support for repetition across multiple TRPs in the frequency, layer (spatial), or time domains (URLLC schemes, e.g., schemes 1, 2a, 2b, 3, 4) is being studied. In scheme 1, multiple PDSCHs from multiple TRPs are space-division multiplexing (SDM). In schemes 2a and 2b, PDSCHs from multiple TRPs are frequency-division multiplexing (FDM). In scheme 2a, for multiple TRPs, the redundancy version (RV) is the same. In scheme 2b, for multiple TRPs, the RV can be the same or different. In schemes 3 and 4, multiple PDSCHs from multiple TRPs are time-division multiplexing (TDM). In scheme 3, multiple PDSCHs from multiple TRPs are transmitted within a single time slot. In Scheme 4, multiple PDSCHs from multiple TRPs are transmitted in different time slots.

[0089] In such a multi-TRP scenario, more flexible transmission control can be achieved using high-quality channels.

[0090] NCJTs using multiple TRPs / panels may require high rank. To support both ideal and non-ideal backhaul between multiple TRPs, a single DCI (single PDCCH, e.g.) can also be supported. Figure 2B ) and multiple DCI (single PDCCH, e.g. Figure 2D For both sides of a single DCI and multiple DCI, the maximum TRP can also be 2.

[0091] For single PDCCH designs (primarily for ideal backhaul), TCI extensions are under investigation. Each TCI code point within the DCI can also correspond to one or two TCI states. The TCI field size can also be the same as the TCI field size in Rel.15.

[0092] For single PDCCH designs (primarily for ideal backhaul), DMRS extensions are under investigation. The UE can support the following combinations of layers from two TRPs indicated via the antenna port field. For single codeword (CW) and single user (SU), the combination of the number of layers in TRP1 and TRP2, expressed as "number of layers in TRP1 + number of layers in TRP2," can also be one of 1+1, 1+2, 2+1, or 2+2. Support for combinations of at least one of 1+3 and 3+1 layers from two TRPs indicated via the antenna port field, support for multi-user (MU) scenarios, and support for two CWs are not yet agreed upon. The size of the antenna port field can also be the same as Rel.15.

[0093] For multi-PDCCH designs (for both ideal and non-ideal backhaul), the maximum number of CORESETs for each PDCCH configuration (PDCCH-Config) can be increased to 5, depending on the UE capabilities. The maximum number of CORESETs that can be set with the same TRP can also be up to the number reported based on the UE capabilities. The same TRP can also be the same higher-level index (e.g., CORESET pool index) set for each PDCCH configuration, and if set, for each CORESET. UE capabilities can also include at least 3 candidate values.

[0094] For multi-PDCCH designs (for both ideal and non-ideal backhaul), the maximum number of resources for at least one of the following can be increased, depending on the UE's capabilities: per serving cell, per time slot, and per CCE.

[0095] For multi-TRP transmissions, since the CSI (Content Indicator Sequence) is typically different for multiple different TRPs, it is not obvious how to measure and report the CSI for multiple different TRPs. For a single TRP, the channel / interference conditions vary depending on the transmission decisions (traffic) of neighboring TRPs. Therefore, it is not obvious how to measure and report the CSI for multiple different interference hypotheses.

[0096] Therefore, the inventors of this invention conceived of a method for measuring and reporting the CSI of multi-panel / TRP.

[0097] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The wireless communication methods involved in each embodiment can be applied individually or in combination.

[0098] In this disclosure, “A / B” and “at least one of A and B” can also be used interchangeably.

[0099] In this disclosure, the following terms can be interchanged: panel, uplink (UL) transmitting entity, TRP, spatial relationship, control resource set (CORESET), PDSCH, codeword, base station, antenna port of a signal (e.g., demodulation reference signal (DMRS) port), antenna port group of a 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)), and layer (MIMO layer, transmitting layer, spatial layer). Furthermore, the panel identifier (ID) and panel can also be interchanged. In this disclosure, the TRP ID and TRP can also be interchanged.

[0100] In this disclosure, NCJT, NCJT using multiple TRPs, multiple PDSCH using NCJT, multiple PDSCH, and multiple PDSCH from multiple TRPs can be used interchangeably. Furthermore, multiple PDSCH can mean multiple PDSCHs with at least a portion (e.g., 1 symbol) of overlapping time resources, multiple PDSCHs with all (e.g., all symbols) overlapping time resources, multiple PDSCHs with no overlap in time resources, multiple PDSCHs transmitting the same TB or the same CW, or multiple PDSCHs with different UE beams (spatial domain receive filter, QCL parameters) applied.

[0101] In this disclosure, cell, CC, carrier, BWP, and band can be interchanged.

[0102] In this disclosure, indexes, IDs, indicators, and resource IDs can also be interchanged.

[0103] (Wireless communication method)

[0104] In this disclosure, the TRP index, CORESET pool index, pool index, group index, CSI report settings group index, CSI report group index, CSI report setting index, CSI report setting group index, and resource settings group index can also be interchanged.

[0105] In this disclosure, the terms "channel measurement resource settings," "channel measurement resources," and "resourcesForChannelMeasurement" can be substituted for each other. Similarly, the terms "interference CSI-IM resource settings," "CSI-IM based interference measurement resources," "csi-IM-ResourceForInterference," and "interference measurement resources" can also be substituted for each other. Furthermore, the terms "interference NZP-CSI-RS resource settings," "NZP-CSI-RS based interference measurement resources," and "nzp-CSI-RS-ResourcesForInterference" can also be substituted for each other.

[0106] <Implementation Method 1>

[0107] It also supports separate settings for CSI measurements and reports across multiple TRPs. The base station can also send settings for separate CSI measurements and reports across multiple TRPs. The base station can also receive (acquire) CSI reports based on these separate settings for CSI measurements and reports across multiple TRPs.

[0108] You can also configure separate CSI reporting settings (CSI-ReportConfig) for multiple TRPs. For example, such as... Figure 3 As shown, the UE can also be configured with CSI report settings for TRP#1 and CSI report settings for TRP#2.

[0109] Implementation Method 1-1

[0110] The relationship between CSI report settings and TRP can also be set according to one of TRP relationships 1 and 2 as follows.

[0111] [TRP Association 1]

[0112] The association between CSI report settings and TRP can be transparent to the UE (or it can be unrecognized by the UE, or it can be invisible to the UE).

[0113] [TRP Association 2]

[0114] The association between CSI report settings and TRP can also be explicitly indicated to the UE.

[0115] Alternatively, at least one of the following association parameters 1 to 3 can be used to associate the CSI report with the TRP.

[0116] [[Associated Parameter 1]]

[0117] You can also import CSI report group indexes (CSI report settings group indexes). Individual CSI report settings can also be associated with CSI report group indexes.

[0118] For example, such as Figure 4 As shown, the CSI report configuration (CSI-ReportConfig) may also include a CSI report group index (CSI report configuration group index, CSI-ReportConfigGroupId, CSI-ReportSettingGroupId), and further include at least one of the following: CSI report configuration index (CSI-ReportConfigId), resources for channel measurement (resourcesForChannelMeasurement), CSI-IM resources for interference (csi-IM-ResourcesForInterference), and NZP-CSI-RS resources for interference (np-CSI-RS-ResourcesForInterference).

[0119] [[Associated Parameter 2]]

[0120] Each CSI report setting can also be associated with the value of the CORESET Pool Index.

[0121] For example, such as Figure 5 As shown, the CSI report configuration (CSI-ReportConfig) may also include a CORESET pool index (CORESETPoolIndex), and further include at least one of the following: CSI report configuration index (CSI-ReportConfigId), resources for channel measurement (resourcesFroChannelMeasurement), CSI-IM resource configuration for interference (csi-IM-ResourcesForInterference), and NZP-CSI-RS resource configuration for interference (np-CSI-RS-ResourcesForInterference).

[0122] [[Associated Parameter 3]]

[0123] The PUCCH resource set for CSI report settings can also be associated with the value of the CORESET pool index or the value of the CSI report group index.

[0124] For example, such as Figure 6 As shown, the CSI report configuration (CSI-ReportConfig) may also include a report configuration type (reportConfigType), and further include at least one of the following: CSI report configuration index (CSI-ReportConfigId), channel measurement resource settings (resourcesFroChannelMeasurement), interference CSI-IM resource settings (csi-IM-ResourcesForInterference), and interference NZP-CSI-RS resource settings (np-CSI-RS-ResourcesForInterference). The report configuration type may also include periodic or semi-persistent on PUCCH information. This information may also include the CSI report period and offset (CSI-ReportPeriodicityAndOffset). The CSI report period and offset may also include PUCCH-CSI resources (PUCCH-CSI-Resource). The PUCCH-CSI resource may also include a CORESET pool index (CORESETPoolIndex) or a CSI report group index (CSI-ReportConfigGroupId).

[0125] Implementation Methods 1-2

[0126] For a TRP, in order to reflect multiple different interference premises depending on the transmission decisions of neighboring TRPs, at least one of the rules in 1 and 2 can also be associated with the interference premises as follows.

[0127] [Interference Prerequisite Related 1]

[0128] For multiple different interference hypotheses, the separation settings for CSI measurement and reporting can also be set for the UE.

[0129] For example, such as Figure 7 As shown, multiple CSI reports can also be associated with different IDs for multiple interference conditions in a TRP.

[0130] For example, such as Figure 8 As shown, for TRP#1, a CSI report #1 corresponding to interference condition #1 is set, and a CSI report #2 corresponding to interference condition #2 is set. Interference condition #1 includes Channel Measurement Resource (CMR) #1 and Interference Measurement Resource (IMR) #1. Interference condition #2 includes CMR #2 and IMR #2. For example, as... Figure 9 As shown, for TRP#2, a CSI report #3 corresponding to interference condition #3 is set, and a CSI report #4 corresponding to interference condition #4 is set. Interference condition #3 includes CMR#3 and IMR#3. Interference condition #4 includes CMR#4 and IMR#4.

[0131] [Interference Prerequisites Related 2]

[0132] The joint settings for CSI measurements and reports under multiple different interference conditions can also be set for the UE.

[0133] In the CSI report settings for a TRP, multiple resource settings can be configured. One of these resource settings can also be a resource setting used for channel measurement. Furthermore, multiple (M) of these resource settings can also be resource settings used for interference measurement based on CSI-IM.

[0134] In a resource setup, each CSI-RS resource used for channel measurement can also be associated with a CSI-IM resource in the order of the CSI-RS resources in the resource set and the corresponding CSI-IM resources in the resource set.

[0135] If K is set within the corresponding resource set used for channel measurementS (K S In the case of >1) resources, for each resource setting used in CSI-IM-based interference measurement, the UE can also derive CSI parameters other than the reported CRI using the reported CRI as a condition. CRI l = k + m * K S (0≤k<K S , 0≤m<M, 0≤l<L(M*K) S This can also correspond to the (k+1)th entry of the associated NZP-CSI-RS resource setting (nzp-CSI-RSResource) within the corresponding NZP-CSI-RS resource set information (nzp-CSI-RS-ResourceSet) used for channel measurement, and the (k+1)th entry of the associated CSI-IM resource setting (csi-IM-Resource) within the corresponding CSI-IM resource set information (csi-IM-ResourceSet) used for CSI-IM interference measurement if it is set.

[0136] For example, such as Figure 10A As shown, the CSI report configuration includes one resource setting for channel measurement (resourcesForChannelMeasurement) and M CSI-IM resource settings for interference (csi-IM-ResourceForInterference). The M CSI-IM resource settings for interference correspond to multiple different interference scenarios.

[0137] For example, such as Figure 10B As shown, the CSI report configuration (CSI-ReportConfig) includes one resource setting for channel measurement (resourcesForChannelMeasurement) and M interference resource settings. The M interference resource settings correspond to multiple different interference conditions. Each interference resource setting is at least one of the interference CSI-IM resource setting (csi-IM-ResourceForInterference) and the interference NZP-CSI-RS resource setting (nzp-CSI-RS-ResourcesForInterference).

[0138] For a CSI report, CSI parameters can also be mapped into the CSI report according to at least one of the following mapping methods 1 and 2.

[0139] [[Mapping Method 1]]

[0140] The mapping order of multiple different CSI fields can also be the same as in Rel.15. Within the same CSI field (of the same type of CSI), multiple fields can be included, each corresponding to an interference premise / resource setting.

[0141] Figure 11 This is a diagram illustrating an example of CSI fields within CSI report #n. In CSI report #n, for a given CSI type, the fields corresponding to the first CRI are consecutive, based on resource settings / interference conditions, up to the fields corresponding to the Lth CRI.

[0142] [[Mapping Method 2]]

[0143] For a given interference premise / resource setting, the mapping order of multiple different CSI fields can also be the same as in Rel.15. The CSI mapping order can also span multiple different interference premises / resource settings, becoming either ascending or descending order of the resource setting ID.

[0144] Figure 12 This is a diagram illustrating another example of CSI fields within CSI report #n. In CSI report #n, after mapping multiple CSI fields corresponding to the first CRI based on resource settings / interference premises, multiple CSI fields corresponding to the second CRI are then mapped, and mapping continues until multiple CSI fields corresponding to the Lth CRI are mapped.

[0145] Resource settings for NZP-CSI-RS-based interference measurements can be set or not set. If set, the content of Implementation 1 can also be applied to the resource settings for NZP-CSI-RS-based interference measurements.

[0146] For example, such as Figure 13 As shown, for TRP#1, CSI report #1 corresponding to interference preconditions #1 and #2 is set. Interference precondition #1 includes CMR#1 and IMR#1-1. Interference precondition #2 includes CMR#1 and IMR#1-2. For example, as... Figure 14 As shown, for TRP#2, a CSI report #2 corresponding to interference conditions #1 and #2 is set. Interference condition #1 includes CMR#2 and IMR#2-1. Interference condition #2 includes CMR#2 and IMR#2-2.

[0147] According to Implementation Method 1, CSI reports for multiple TRPs can be appropriately configured.

[0148] <Implementation Method 2>

[0149] It can also support joint settings for CSI measurement and reporting for multiple TRPs. The base station can also send joint settings for CSI measurement and reporting for multiple TRPs. The base station can also receive (acquire) CSI reports based on the joint settings for CSI measurement and reporting for multiple TRPs.

[0150] CSI reporting settings (CSI-ReportConfig) for multiple TRPs can also be configured.

[0151] Implementation Method 2-1

[0152] In the CSI report settings, multiple resource configuration groups can also be configured. Each resource configuration group (RSG) can also be associated with a TRP. For a resource configuration group, at least one of the resource configuration group index, TRP index, and CORESET pool index can also be imported.

[0153] The resource settings group index can also be the same as the TRP index. It can also support only two resource settings groups.

[0154] For example, such as Figure 15 As shown, the CSI report configuration includes Y resource setting groups. Each resource setting group contains one channel measurement resource setting and zero or more interference measurement resource settings. The interference measurement resource settings are either interference CSI-IM resource settings or interference NZP-CSI-RS resource settings.

[0155] Implementation Method 2-2

[0156] For a TRP, in order to reflect multiple different interference premises depending on the transmission decisions of neighboring TRPs, one of the rules associated with interference premises 1 and 2 can also be followed.

[0157] [Interference Prerequisite Related 1]

[0158] For multiple different interference scenarios, the CSI measurement and reporting separation settings can also be set for the UE.

[0159] Within a resource setting group in the CSI report settings, more than one resource setting can be configured. When two resource setting groups are configured, one or the first resource setting can be a resource setting for channel measurement, while the other or the second resource setting can be a resource setting for interference measurement based on CSI-IM.

[0160] The number of CSI-IM resources used for interference measurement can also be equal to the number of CSI-RS resources used for channel measurement.

[0161] In a resource setup, each CSI-RS resource used for channel measurement can also be associated with a CSI-IM resource in the order of the CSI-RS resources in the resource set and the corresponding CSI-IM resources in the resource set.

[0162] If K is set within the corresponding resource set used for channel measurement S (K S In the case of >1) resources, for each resource setting used for interference measurement based on CSI-IM, the UE can also derive CSI parameters other than the reported CRI as a condition. CSI k (k≥0) corresponds to the (k+1)th set of the associated NZP-CSI-RS resource setting (nzp-CSI-RSResource) in the corresponding NZP-CSI-RS resource set information (nzp-CSI-RS-ResourceSet) used for channel measurement, and (if set) the (k+1)th set of the associated CSI-IM resource setting (csi-IM-Resource) in the corresponding CSI-IM resource set information (csi-IM-ResourceSet).

[0163] For example, such as Figure 16 As shown, CSI report settings #1 and #2 are associated with interference premises #1 and #2, respectively. Each CSI report setting includes resource setting groups #1, #2, ..., #Y. A resource setting group may or may not contain NZP-CSI-RS resource settings.

[0164] A single CSI report may also report CSI for multiple TRPs. A CSI report may also follow one of the following criteria 1 through 3.

[0165] [Content 1]

[0166] CSI parameters for multiple TRPs can also be reported separately. For example, the UE can calculate and report the CSI parameters for each TRP. CSI parameters can also include at least one of RI, PMI, and CQI.

[0167] The base station can also identify the resource setting group index for the CSI report according to one of the following resource setting group index determination methods 1 and 2.

[0168] [[[Resource Settings Group Index Determination Method 1]]]

[0169] The UE can also explicitly report the resource setting group index corresponding to the resource setting group in the CSI report.

[0170] [[[Resource Settings Group Index Determination Method 2]]]

[0171] The resource settings group index corresponding to the resource settings group can also be determined implicitly.

[0172] For CSI report content, CSIs with multiple different interference premises can also be mapped into the CSI report according to at least one of the following mapping methods 1 and 2.

[0173] [[[[Mapping Method 1]]]]

[0174] The mapping order of multiple different CSI fields can also be the same as in Rel.15. Within the same CSI field (CSI of the same type), multiple fields can be contained, each corresponding to a resource setting group. Fields corresponding to the lowest or highest resource setting group index can also be initially mapped (fields within the same CSI field can also be mapped based on ascending or descending order of the resource setting group index).

[0175] Figure 17 This is a diagram illustrating an example of CSI fields within CSI report #n. In CSI report #n, for a CSI category, the fields are consecutive from the field corresponding to the 1st resource setting group to the field corresponding to the Yth resource setting group.

[0176] [[[[Mapping Method 2]]]]

[0177] For a given resource setting group, the mapping order of multiple different CSI fields can be the same as in Rel.15. The CSI mapping order can also span multiple different resource setting groups, becoming the ascending or descending order of the resource setting group index.

[0178] Figure 18 This is a diagram illustrating another example of CSI fields within CSI report #n. In CSI report #n, after multiple CSI fields corresponding to the first resource setting group, multiple CSI fields corresponding to the second resource setting group are mapped, and this mapping continues until multiple CSI fields corresponding to the Yth resource setting group are mapped.

[0179] [Content 2]

[0180] CSI parameters for multiple TRPs can also be reported jointly. For example, the UE can calculate and report the joint CSI parameters for multiple TRPs. A joint CSI parameter can also be a value obtained for a type of CSI based on multiple values ​​corresponding to each of the multiple TRPs. The UE can also encode multiple values ​​for a type of CSI to derive a value for the joint CSI parameter. A joint CSI parameter can also correspond to a field. The CSI parameter can also include at least one of RI, PMI, and CQI.

[0181] The number of CSI parameters can also be determined according to one of the following methods, 1 or 2.

[0182] [[[Method 1 for determining the number of CSI parameters]]]

[0183] The number of joint CSI parameters reported can also be specified in the specification. For example, in the y-th CSI report associated with Y resource setting groups, the number of reported CSI parameters could also be C. Y y .

[0184] [[[Method 2 for determining the number of CSI parameters]]]

[0185] The number of CSI parameters reported can also be set via RRC.

[0186] [Content 3]

[0187] Whether the CSI parameters of multiple TRPs are reported separately or jointly can also be set via RRC.

[0188] This setting can also be configured using one of the following methods, 1 or 2.

[0189] [[[Setting Method 1]]]

[0190] Whether the CSI parameters of multiple TRPs are reported separately or jointly can also be implicitly set via RRC.

[0191] If the number of CSI reports is the same as the number of resource setting groups, report the separate CSIs for the corresponding TRP in a single CSI report. Otherwise, report the combined CSIs for multiple TRPs.

[0192] [[[Setting Method 2]]]

[0193] Whether the CSI parameters of multiple TRPs are reported separately or jointly can also be explicitly set via RRC.

[0194] For example, such as Figure 19 as well as Figure 20 As shown, separate CSI measurements and reports are set for multiple different interference conditions. For example, CSI report #1 for interference condition #1 without inter-TRP interference is as follows: Figure 19 As shown, resource setting group #1 is used for TRP #1, and resource setting group #2 is used for TRP #2. The resources in resource setting groups #1 and #2 do not overlap. For example, CSI report #2 for interference premise #2 with interference from one TRP is as follows: Figure 20 As shown, there are resource setting groups #1 for TRP #1 and #2 for TRP #2. The CMR of resource setting group #1 overlaps with the IMR of resource setting group #2, and the CMR of resource setting group #2 overlaps with the IMR of resource setting group #1.

[0195] [Interference Prerequisites Related 2]

[0196] The joint settings for CSI measurements and reports under multiple different interference conditions can also be set for the UE.

[0197] Multiple resource settings can be configured within a resource settings group within a CSI report setting. One of these resource settings can also be a resource setting used for channel measurement. Multiple (M) of these resource settings can also be resource settings used for interference measurement based on CSI-IM.

[0198] For the resource settings used in interference measurements on CSI-IM, the number of CSI-IM resources used for interference measurements can also be equal to the number of CSI-RS resources used for channel measurements.

[0199] In a resource setup, each CSI-RS resource used for channel measurement can also be associated with a CSI-IM resource in the order of the CSI-RS resources in the resource set and the corresponding CSI-IM resources in the resource set.

[0200] If K is set within the corresponding resource set used for channel measurement S (K S In the case of >1) resources, for each resource setting used in CSI-IM-based interference measurement, the UE can also derive CSI parameters other than the reported CRI using the reported CRI as a condition. CRIz = k + m * K S (0≤k<K S, 0≤m<M, 0≤z<Z(M*K) S This can also correspond to the (k+1)th entry of the associated NZP-CSI-RS resource setting (nzp-CSI-RSResource) within the corresponding NZP-CSI-RS resource set information (nzp-CSI-RS-ResourceSet) used for channel measurement, and (if set) the (k+1)th entry of the associated CSI-IM resource setting (csi-IM-Resource) within the corresponding CSI-IM resource set information (csi-IM-ResourceSet) used for CSI-IM interference measurement.

[0201] The number of resource settings M used for interference measurement based on CSI-IM can also be the same across multiple different resource setting groups within a single CSI report setting.

[0202] Each resource setting for CSI-IM-based interference measurement within a resource setting group can also be associated with resource settings for CSI-IM-based interference measurement in other resource setting groups on a per-resource-setting basis.

[0203] If there are M (M>1) resource settings for CSI-IM-based interference measurement in a resource setting group, the (m+1)th resource setting for CSI-IM-based interference measurement in a resource setting group can also be associated with the (m+1)th resource setting in another resource setting group.

[0204] Resource settings for NZP-CSI-RS-based interference measurements can be set or not set. If set, the content of Implementation Method 2 can also be applied to resource settings for NZP-CSI-RS-based interference measurements.

[0205] For example, such as Figure 21 As shown, the CSI report configuration (CSI-ReportConfig) contains Y resource configuration groups. Each resource configuration group contains one resource configuration for channel measurement (resourcesForChannelMeasurement), M CSI-IM resource configurations for interference (csi-IM-ResourceForInterference), and zero or more NZP-CSI-RS resource configurations for interference (nzp-CSI-RS-ResourcesForInterference). A resource configuration group can also correspond to multiple TRPs. Multiple resource configurations within a single resource configuration group can also correspond to multiple interference conditions.

[0206] A single CSI report may also report CSI for multiple TRPs and multiple interference premises. A CSI report may also follow one of the following criteria 1 through 3.

[0207] [Content 1]

[0208] CSI parameters for multiple TRPs and multiple interference conditions can also be reported separately. For example, the UE can calculate and report the CSI parameters for each TRP and each interference condition. CSI parameters may also include at least one of RI, PMI, and CQI.

[0209] The base station can also identify the resource setting group index for the CSI report according to one of the following resource setting group index determination methods 1 and 2.

[0210] [[[Resource Settings Group Index Determination Method 1]]]

[0211] The UE can also explicitly report the resource setting group index corresponding to the resource setting group in the CSI report.

[0212] [[[Resource Settings Group Index Determination Method 2]]]

[0213] The resource settings group index corresponding to the resource settings group can also be determined implicitly.

[0214] For a CSI report, CSI parameters can also be mapped into the CSI report according to at least one of the following mapping methods 1 to 6.

[0215] [[[[Mapping Method 1]]]]

[0216] CSI parameters can also be mapped to the CSI report in the following order: CSI parameter type (CSI field name), Resource Setting Group (TRP) index, and Resource Setting (Interference Prerequisite) index within a Resource Setting Group.

[0217] [[[[Mapping Method 2]]]]

[0218] CSI parameters can also be mapped to the CSI report in the following order: CSI parameter type (CSI field name), resource setting (interference premise) index within a resource setting group, and resource setting group (TRP) index.

[0219] [[[[Mapping Method 3]]]]

[0220] CSI parameters can also be mapped to the CSI report in the order of Resource Setting Group (TRP) index, CSI parameter type (CSI field name), and resource setting (interference premise) index within a resource setting group.

[0221] [[[[Mapping Method 4]]]]

[0222] CSI parameters can also be mapped to the CSI report in the following order: Resource Setting Group (TRP) index, Resource Setting (Interference Prerequisite) index within a Resource Setting Group, and CSI parameter type (CSI field name).

[0223] [[[[Mapping Method 5]]]]

[0224] CSI parameters can also be mapped to the CSI report in the following order: resource setting (interference premise) index within a resource setting group, resource setting group (TRP) index, and CSI parameter type (CSI field name).

[0225] [[[[Mapping Method 6]]]]

[0226] CSI parameters can also be mapped to the CSI report in the order of resource setting (interference premise) index within a resource setting group, type of CSI parameter (CSI field name), and resource setting group (TRP) index.

[0227] [Content 2]

[0228] For a given interference condition, CSI parameters for multiple TRPs can also be reported jointly. For example, the UE can calculate and report the joint CSI parameters for multiple TRPs for a given interference condition. A joint CSI parameter can also be a value obtained for a type of CSI corresponding to a given interference condition based on multiple values ​​corresponding to each of the multiple TRPs. The UE can also encode multiple values ​​for a type of CSI to derive a single value for the joint CSI parameter. A joint CSI parameter can also correspond to a single field. The CSI parameter can also include at least one of RI, PMI, and CQI.

[0229] The number of CSI parameters can also be determined according to one of the following methods, 1 or 2.

[0230] [[[Method 1 for determining the number of CSI parameters]]]

[0231] The number of joint CSI parameters reported can also be specified in the specification. For example, in the y-th CSI report associated with Y resource setting groups, the number of reported CSI parameters could also be C. Yy .

[0232] [[[Method 2 for determining the number of CSI parameters]]]

[0233] The number of CSI parameters reported can also be set via RRC.

[0234] [Content 3]

[0235] For a given disturbance condition, whether the CSI parameters for multiple TRPs are reported separately or jointly can also be set via RRC.

[0236] This setting can also be configured using one of the following methods, 1 or 2.

[0237] [[[Setting Method 1]]]

[0238] For a given interference condition, whether the CSI parameters for multiple TRPs are reported separately or jointly can also be implicitly set via RRC.

[0239] If the number of CSI reports is the same as the number of resource setting groups, report the separate CSIs for the corresponding TRP in a single CSI report. Otherwise, report the combined CSIs for multiple TRPs.

[0240] [[[Setting Method 2]]]

[0241] For a given disturbance condition, whether the CSI parameters for multiple TRPs are reported separately or jointly can also be explicitly set via RRC.

[0242] For example, such as Figure 22 as well as Figure 23 As shown, for multiple interference conditions and multiple TRPs, a joint CSI measurement and report (CSI report #1) is set up. For example, CSI report #1 contains resource setting group #1 for TRP #1 and resource setting group #2 for TRP #2. Resource setting group #1 for TRP #1 contains, for example, Figure 22 The resource settings shown are for interference premise #1 without interference between TRPs, and as follows: Figure 23 The resource settings shown are for interference premise #2 with interference from a TRP. Resource settings group #2 used by TRP #2 includes, for example... Figure 22 The resource settings shown are for interference premise #1 without interference between TRPs, and as follows: Figure 23The resource settings shown are for interference premise #2 with interference from a TRP. In interference premise #1, the resources in resource setting groups #1 and #2 do not overlap. In interference premise #2, the CMR of resource setting group #1 overlaps with the IMR of resource setting group #2, and the CMR of resource setting group #2 overlaps with the IMR of resource setting group #1.

[0243] <Implementation Method 3>

[0244] For multiple TRPs, whether to use separate CSI measurement / reporting settings or combined CSI measurement / reporting settings can also be determined according to one of the following methods 1 and 2.

[0245] [Decision Method 1]

[0246] One of the separate CSI measurement / reporting and the combined CSI measurement / reporting can also be specified in the specification.

[0247] [Decision Method 2]

[0248] Separate CSI measurements / reports or combined CSI measurements / reports can also be set via RRC. If separate CSI measurements / reports are set, Implementation Method 1 can also be applied. If combined CSI measurements / reports are set, Implementation Method 2 can also be applied.

[0249] According to implementation method 3, it is possible to properly set one of separate CSI measurement / reporting and joint CSI measurement / reporting.

[0250] (Wireless Communication System)

[0251] The structure of a wireless communication system according to one embodiment of this disclosure will now be described. In this wireless communication system, communication is performed using one or a combination of the wireless communication methods according to the above embodiments of this disclosure.

[0252] Figure 24 This is a diagram illustrating an example of the schematic structure of a wireless communication system according to one embodiment. The wireless communication system 1 may also be a system that uses Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) as standardized by the Third Generation Partnership Project (3GPP).

[0253] Furthermore, the wireless communication system 1 can also support dual connectivity between multiple radio access technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC can also include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.

[0254] 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.

[0255] The wireless communication system 1 can also support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity between MN and SN, which are both NR base stations (gNB) (NR-NR Dual Connectivity (NN-DC))).

[0256] The wireless communication system 1 may also include a base station 11 forming a macro cell C1 with a relatively wide coverage area, and a base station 12 (12a-12c) configured within the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located within at least one cell. The configuration and number of each cell and the user terminal 20 are not limited to the arrangement shown in the figure. Hereinafter, without distinguishing between base stations 11 and 12, they will be collectively referred to as base station 10.

[0257] User terminal 20 can also connect to at least one of the multiple base stations 10. User terminal 20 can also utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).

[0258] Each CC can also be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)). Macro cell C1 can also be included in FR1, and small cell C2 can also be included in FR2. For example, FR1 can also be a frequency band below 6 GHz (sub-6 GHz), and FR2 can also be a frequency band above 24 GHz (above-24 GHz). Furthermore, the frequency bands and definitions of FR1 and FR2 are not limited to these; for example, FR1 can also correspond to a frequency band higher than FR2.

[0259] In addition, user terminal 20 can also communicate in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD).

[0260] Multiple base stations 10 can also be connected via wired (e.g., fiber optic, X2 interface, etc., conforming to the Common Public Radio Interface (CPRI)) or wireless (e.g., NR communication). For example, when NR communication between base stations 11 and 12 is used as backhaul, base station 11 corresponding to the host station can also be referred to as the Integrated Access Backhaul (IAB) donor, and base station 12 corresponding to the relay station can also be referred to as an IAB node.

[0261] Base station 10 can also be connected to core network 30 via other base stations 10 or directly. Core network 30 may include at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), etc.

[0262] User terminal 20 can also be a terminal that supports at least one of the following communication methods: LTE, LTE-A, 5G, etc.

[0263] In wireless communication system 1, wireless access methods based on Orthogonal Frequency Division Multiplexing (OFDM) can also be utilized. For example, in at least one of the downlink (DL) and uplink (UL) links, Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA) can also be utilized.

[0264] The wireless access method can also be referred to as a waveform. In addition, in the wireless communication system 1, other wireless access methods (e.g., other single-carrier transmission methods, other multi-carrier transmission methods) can also be used for the wireless access methods of UL and DL.

[0265] In the wireless communication system 1, the downlink channel can also be a shared downlink channel (Physical Downlink Shared Channel (PDSCH)), a broadcast channel (Physical Broadcast Channel (PBCH)), or a downlink control channel (Physical Downlink Control Channel (PDCCH)) shared by each user terminal 20.

[0266] In addition, in the wireless communication system 1, the uplink channel can also be an uplink shared channel (Physical Uplink Shared Channel (PUSCH)), an uplink control channel (Physical Uplink Control Channel (PUCCH)), or a random access channel (Physical Random Access Channel (PRACH)) shared by each user terminal 20.

[0267] User data, high-level control information, and System Information Blocks (SIBs) are transmitted via the PDSCH. User data and high-level control information can also be transmitted via the PUSCH. Furthermore, the Master Information Block (MIB) can also be transmitted via the PBCH.

[0268] Lower-layer control information can also be transmitted via PDCCH. Lower-layer control information may include, for example, downlink control information (DCI) containing scheduling information of at least one of PDSCH and PUSCH.

[0269] Additionally, the DCI that schedules PDSCH can also be called DL allocation, DL DCI, etc., and the DCI that schedules PUSCH can also be called UL authorization, UL DCI, etc. Furthermore, PDSCH can be replaced with DL data, and PUSCH can be replaced with UL data.

[0270] In PDCCH detection, a Control Resource Set (CORESET) and a search space can be utilized. A CORESET corresponds to the resources used to search for DCIs. The search space corresponds to the search area and search method for PDCCH candidates. A CORESET can also be associated with one or more search spaces. The UE can also monitor CORESETs associated with a specific search space based on search space settings.

[0271] A search space can also correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces can also be referred to as a search space set. In addition, the terms "search space", "search space set", "search space setting", "search space set setting", "CORESET", and "CORESET setting" used in this disclosure can be used interchangeably.

[0272] Uplink control information (UCI) including at least one of Channel State Information (CSI), delivery confirmation information (e.g., also known as Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK), ACK / NACK, etc.), and Scheduling Request (SR) can also be transmitted via PUCCH. Random access preambles used for establishing a connection with the cell can also be transmitted via PRACH.

[0273] Furthermore, in this disclosure, downlink, uplink, etc., can be represented without the prefix "link". Additionally, the prefix "physical" can be omitted from the beginning of various channels.

[0274] In wireless communication system 1, synchronization signals (SS) and downlink reference signals (DL-RS) can also be transmitted. In wireless communication system 1, cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), positioning reference signals (PRS), and phase tracking reference signals (PTRS) can also be transmitted as DL-RS.

[0275] Synchronization signals can be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block containing SS (PSS, SSS) and PBCH (and DMRS for PBCH) can also be called an SS / PBCH block, SS Block (SSB), etc. Furthermore, SS, SSB, etc., can also be called reference signals.

[0276] Furthermore, in wireless communication system 1, measurement reference signals (Sounding Reference Signal (SRS)) and demodulation reference signals (DMRS) can also be transmitted as uplink reference signals (UL-RS). Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals).

[0277] (Base station)

[0278] Figure 25 This diagram illustrates an example of the structure of a base station according to one embodiment. The base station 10 includes a control unit 110, a transmit / receive unit 120, a transmit / receive antenna 130, and a transmission line interface 140. Alternatively, the control unit 110, the transmit / receive unit 120, the transmit / receive antenna 130, and the transmission line interface 140 may each be provided in more than one form.

[0279] Furthermore, while this example primarily illustrates the functional blocks of the characteristic portions of this embodiment, it is also conceivable that the base station 10 may also have other functional blocks required for wireless communication. Some of the processing of each unit described below may also be omitted.

[0280] The control unit 110 performs overall control of the base station 10. The control unit 110 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the art to which this disclosure pertains.

[0281] The control unit 110 can also control signal generation and scheduling (e.g., resource allocation, mapping). The control unit 110 can also control transmission, reception, and measurement using the transmit / receive unit 120, transmit / receive antenna 130, and transmission path interface 140. The control unit 110 can also generate data, control information, sequences, etc., for signal transmission and forward them to the transmit / receive unit 120. The control unit 110 can also perform call processing (setting, releasing, etc.) of the communication channel, status management of the base station 10, and management of wireless resources.

[0282] The transmitting / receiving unit 120 may also include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmitting processing unit 1211 and a receiving processing unit 1212. The transmitting / receiving unit 120 can be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0283] The transmitting and receiving unit 120 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 1211 and an RF unit 122. The receiving unit can also be composed of a receiving processing unit 1212, an RF unit 122, and a measurement unit 123.

[0284] The transmitting and receiving antenna 130 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0285] The transmitting / receiving unit 120 can also transmit the aforementioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitting / receiving unit 120 can also receive the aforementioned uplink channel, uplink reference signal, etc.

[0286] The transmitting and receiving unit 120 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0287] The transmitting and receiving unit 120 (transmitting processing unit 1211) may, for example, process the data and control information obtained from the control unit 110 through the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer (e.g., RLC retransmission control), and the Medium Access Control (MAC) layer (e.g., HARQ retransmission control) to generate a bit string to be transmitted.

[0288] The transmitting and receiving unit 120 (transmitting processing unit 1211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, Discrete Fourier Transform (DFT) processing (as needed), Inverse Fast Fourier Transform (IFFT) processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0289] The transmitting and receiving unit 120 (RF unit 122) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 130.

[0290] On the other hand, the transmitting and receiving unit 120 (RF unit 122) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 130 into the baseband signal.

[0291] The transmitting and receiving unit 120 (receiving and processing unit 1212) can also perform receiving and processing on the acquired baseband signal, including analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, to obtain user data.

[0292] The transmitting / receiving unit 120 (measurement unit 123) can also perform measurements related to the received signal. For example, the measurement unit 123 can also perform radio resource management (RRM) measurements, channel state information (CSI) measurements, etc., based on the received signal. The measurement unit 123 can also 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 can also be output to the control unit 110.

[0293] The transmission path interface 140 can also send and receive signals (backhaul signaling) between devices included in the core network 30 and other base stations 10, and acquire and transmit user data (user plane data), control plane data, etc. for user terminal 20.

[0294] In addition, the transmitting unit and receiving unit of the base station 10 in this disclosure may also be composed of at least one of the transmitting and receiving unit 120, the transmitting and receiving antenna 130 and the transmission path interface 140.

[0295] The transmitting / receiving unit 120 can also transmit multiple settings (separate settings, CSI report settings) for channel state information (CSI) measurement and reporting. These multiple settings can also correspond to two or more transmitting / receiving points. The control unit 110 can also obtain at least one CSI report based on these multiple settings (Embodiment 1).

[0296] The transmit / receive unit 120 may also transmit at least one setting (joint setting, CSI report setting) for measuring and reporting channel state information (CSI) for multiple transmit / receive points. The control unit 110 may also obtain a CSI report based on the settings (Embodiment 2).

[0297] (User terminal)

[0298] Figure 26This diagram illustrates an example of the structure of a user terminal according to one embodiment. The user terminal 20 includes a control unit 210, a transmitting / receiving unit 220, and a transmitting / receiving antenna 230. Alternatively, the control unit 210, the transmitting / receiving unit 220, and the transmitting / receiving antenna 230 may each be provided as one or more.

[0299] Furthermore, in this example, the functional blocks that mainly represent the characteristic parts of this embodiment are shown. The user terminal 20 can also be conceived to have other functional blocks required for wireless communication. Some of the processing of each unit described below can also be omitted.

[0300] The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be composed of a controller, control circuit, etc., which are described based on common knowledge in the technical field to which this disclosure pertains.

[0301] The control unit 210 can also control signal generation, mapping, etc. The control unit 210 can also control transmission, reception, measurement, etc., using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 can also generate data, control information, sequences, etc., for signal transmission and forward them to the transmission / reception unit 220.

[0302] The transmitting / receiving unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may also include a transmitting processing unit 2211 and a receiving processing unit 2212. The transmitting / receiving unit 220 may be composed of transmitters / receivers, RF circuits, baseband circuits, filters, phase shifters, measurement circuits, transmitting / receiving circuits, etc., as described based on common knowledge in the art to which this disclosure pertains.

[0303] The transmitting and receiving unit 220 can be configured as a single integrated transmitting and receiving unit, or it can be composed of a transmitting unit and a receiving unit. The transmitting unit can also be composed of a transmitting processing unit 2211 and an RF unit 222. The receiving unit can also be composed of a receiving processing unit 2212, an RF unit 222, and a measurement unit 223.

[0304] The transmitting and receiving antenna 230 can be constructed from an antenna, such as an array antenna, as described based on common knowledge in the art to which this disclosure pertains.

[0305] The transmitting / receiving unit 220 can also receive the downlink channel, synchronization signal, downlink reference signal, etc., mentioned above. The transmitting / receiving unit 220 can also transmit the uplink channel, uplink reference signal, etc., mentioned above.

[0306] The transmitting and receiving unit 220 may also use digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc., to form at least one of the transmitting beam and the receiving beam.

[0307] The transmitting and receiving unit 220 (transmitting processing unit 2211) may, for example, perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) on the data and control information obtained from the control unit 210, and generate the bit string to be transmitted.

[0308] The transmitting and receiving unit 220 (transmitting processing unit 2211) can also perform channel coding (which may include error correction coding), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion and other transmission processing on the bit string to be transmitted, and output the baseband signal.

[0309] Furthermore, whether or not to apply DFT processing can also be based on the setting of transform precoding. If transform precoding for a certain channel (e.g., PUSCH) is enabled, the transmit / receive unit 220 (transmit processing unit 2211) may perform DFT processing as the aforementioned transmission processing in order to transmit the channel using DFT-s-OFDM waveforms; otherwise, it may not perform DFT processing as the aforementioned transmission processing.

[0310] The transmitting and receiving unit 220 (RF unit 222) can also perform modulation, filtering, amplification, etc. on the baseband signal to the wireless frequency band, and transmit the wireless frequency band signal through the transmitting and receiving antenna 230.

[0311] On the other hand, the transmitting and receiving unit 220 (RF unit 222) can also amplify, filter, and demodulate the signals of the wireless frequency band received by the transmitting and receiving antenna 230 into the baseband signal.

[0312] The transmitting and receiving unit 220 (receiving and processing unit 2212) can also perform receiving and processing on the acquired baseband signal, such as analog-to-digital conversion, FFT processing, IDFT processing (as needed), filter processing, demapping, demodulation, decoding (which may also include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing, and acquire user data.

[0313] The transmitting / receiving unit 220 (measurement unit 223) can also perform measurements related to the received signal. For example, the measurement unit 223 can also perform RRM measurements, CSI measurements, etc., based on the received signal. The measurement unit 223 can also measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results can also be output to the control unit 210.

[0314] Alternatively, the transmitting and receiving units of the user terminal 20 in this disclosure may also be composed of at least one of the transmitting and receiving unit 220, the transmitting and receiving antenna 230, and the transmission path interface 240.

[0315] The transmit / receive unit 220 can also receive multiple settings (separate settings, CSI reporting settings) for measuring and reporting Channel State Information (CSI). These multiple settings can also correspond to two or more transmit / receive points. The control unit 210 can also perform CSI measurements and reports based on these multiple settings (Embodiment 1).

[0316] Each of the multiple settings may also include an index associated with the corresponding sender / receiver point (e.g., CSI report group index, CORESET pool index).

[0317] Two or more of the stated settings may correspond to a single transmit / receive point. The resources for at least one of the channel measurement and interference measurement may also differ between the stated two or more settings.

[0318] One of the multiple settings can also represent multiple resources used for interference measurement. The control unit 210 can also measure multiple CSIs separately based on the multiple resources and report a CSI report containing the multiple CSIs.

[0319] The transmit / receive unit 220 can also receive at least one setting (joint setting, CSI report setting) for measuring and reporting channel state information (CSI) for multiple transmit / receive points. The control unit 210 can also perform CSI measurement and reporting based on the settings (Embodiment 2).

[0320] Each of the at least one settings may also include multiple groups (e.g., resource setting groups) of channel measurement resources and interference measurement resources. Each of the multiple groups may also include an index associated with the transmitting and receiving points (e.g., a resource setting group index).

[0321] The at least one setting can also be multiple settings. Among the multiple settings, at least one of the channel measurement resources and the interference measurement resources (e.g., resource settings, interference conditions) can also be different.

[0322] The at least one setting can also be a single setting. Each of the plurality of groups can also include multiple combinations of channel measurement resources and interference measurement resources. Among the plurality of combinations, at least one of the channel measurement resources and interference measurement resources can also be different.

[0323] (Hardware Structure)

[0324] Furthermore, the block diagrams used in the description of the above embodiments represent functional units. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a single physically or logically combined device, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices, and implementing it using multiple devices. Functional blocks can also be implemented by combining software within the aforementioned single device or multiple devices.

[0325] Here, the functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regard as, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, a functional block (structural unit) that performs the sending function can also be called a transmitting unit or a transmitter. As described above, the implementation method is not particularly limited.

[0326] For example, the base station, user terminal, etc. in one embodiment of this disclosure can also function as a computer for processing the wireless communication method of this disclosure. Figure 27 This diagram illustrates an example of the hardware structure of a base station and a user terminal according to one embodiment. The base station 10 and the user terminal 20 described above can also be physically configured as a computer device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0327] Furthermore, in this disclosure, terms such as apparatus, circuit, device, section, and unit are interchangeable. The hardware structure of base station 10 and user terminal 20 can be configured to include one or more of the apparatuses shown in the figures, or it can be configured not to include some of the apparatuses.

[0328] For example, only one processor 1001 is illustrated, but there can be multiple processors. Furthermore, processing can be executed by one processor, or by two or more processors simultaneously, sequentially, or using other methods. Additionally, processor 1001 can be implemented using more than one chip.

[0329] The functions of the base station 10 and the user terminal 20 are implemented, for example, by causing specific software (programs) to be read into the hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations, controls communication via the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage device 1003.

[0330] The processor 1001 controls the computer as a whole by operating the operating system, for example. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, at least a part of the control unit 110 (210), the transmit / receive unit 120 (220), etc., described above may also be implemented by the processor 1001.

[0331] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the operations described in the above embodiments. For example, the control unit 110 (210) can also be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and similar implementations can be made for other functional blocks.

[0332] The memory 1002 is a computer-readable recording medium, and may be composed of at least one of the following: Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 is capable of storing executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of this disclosure.

[0333] Storage 1003 is a computer-readable recording medium, and may also consist of at least one of the following: floppy disk, floppy disk, optical disk (e.g., compact disc ROM, CD-ROM, etc.), digital multifunction disk, Blu-ray disc, removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0334] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. The communication device 1004 may, for example, be configured to implement at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD) and includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. For example, the aforementioned transmitting and receiving unit 120 (220) and transmitting and receiving antenna 130 (230) may also be implemented by the communication device 1004. The transmitting and receiving unit 120 (220) may also be implemented such that the transmitting unit 120a (220a) and the receiving unit 120b (220b) are physically or logically separated.

[0335] Input device 1005 is an input device that receives input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, light-emitting diode (LED) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch panel).

[0336] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communication of information. The bus 1007 can be configured using a single bus or different buses between each device.

[0337] Furthermore, the base station 10 and the user terminal 20 may also include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a field-programmable gate array (FPGA), and may use such hardware to implement part or all of the functional blocks. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0338] (Modified Example)

[0339] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, channel, symbol, and signal (signal or signaling) may be used interchangeably. Additionally, a signal may also be a message. A reference signal may also be abbreviated as RS, and may be referred to as pilot, pilot signal, etc., depending on the applied standard. Furthermore, a component carrier (CC) may also be referred to as cell, frequency carrier, carrier frequency, etc.

[0340] A radio frame can also consist of one or more periods (frames) in the time domain. Each of these periods (frames) that constitutes a radio frame can also be called a subframe. Furthermore, a subframe can also consist of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set (numerology).

[0341] Here, the parameter set (numerology) can also be communication parameters applied to at least one of the transmitting and receiving parties of a signal or channel. The parameter set can be, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transmitter and receiver in the frequency domain, and specific windowing processing performed by the transmitter and receiver in the time domain.

[0342] A time slot can also be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a time slot can also be a time unit based on a set of parameters.

[0343] A time slot can also contain multiple mini-time slots. Each mini-time slot can also consist of one or more symbols in the time domain. Furthermore, a mini-time slot can also be called a sub-time slot. A mini-time slot can also consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in a time unit larger than a mini-time slot can also be called PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using mini-time slots can also be called PDSCH (PUSCH) mapping type B.

[0344] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols may also use other names corresponding to them. Furthermore, the time units of frames, subframes, time slots, mini-time slots, and symbols in this disclosure can be used interchangeably.

[0345] For example, a single subframe can also be called a TTI, multiple consecutive subframes can also be called a TTI, and a single time slot or a single mini-time slot can also be called a TTI. That is to say, at least one of a subframe or a TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., 1-13 symbols), or a period longer than 1ms. Furthermore, the unit representing a TTI can also be called a time slot, mini-time slot, etc., instead of a subframe.

[0346] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules radio resources (bandwidth, transmit power, etc. available to each user terminal) in TTI units. However, the definition of TTI is not limited to this.

[0347] TTI can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a unit of processing such as scheduling and link adaptation. In addition, when a TTI is given, the actual time interval (e.g., the number of symbols) of the transmission blocks, code blocks, codewords, etc., that are mapped can be shorter than that TTI.

[0348] Furthermore, while one time slot or one mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can also serve as the minimum time unit for scheduling. In addition, the number of time slots (mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0349] A TTI with a duration of 1ms can also be referred to as a normal TTI (TTI in 3GPP Rel.8-12), a long TTI, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub-time slot, a time slot, etc.

[0350] In addition, long TTIs (e.g., normal TTIs, subframes, etc.) can be replaced with TTIs with a duration of more than 1 ms, and short TTIs (e.g., shortened TTIs, etc.) can be replaced with TTIs with a duration of less than long TTIs but more than 1 ms.

[0351] A resource block (RB) is a unit of resource allocation in the time and frequency domains. In the frequency domain, it can also contain one or more consecutive subcarriers. The number of subcarriers in an RB can be the same as the parameter set (numerology), for example, it can be 12. The number of subcarriers in an RB can also be determined based on the parameter set (numerology).

[0352] In addition, RBs can also contain one or more symbols in the time domain, and can be the length of one time slot, one mini-time slot, one subframe, or one TTI. One TTI, one subframe, etc., can also be composed of one or more resource blocks.

[0353] In addition, one or more RBs can also be referred to as Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0354] In addition, a resource block can also consist of one or more resource elements (REs). For example, one RE can also be a radio resource area consisting of one subcarrier and one symbol.

[0355] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used by a parameter set in a given carrier. Here, common RBs can also be determined by indices of RBs referenced to a common reference point of the carrier. PRBs can also be defined within a BWP and assigned sequence numbers within that BWP.

[0356] A BWP can also include a UL BWP (the BWP used by UL) and a DL BWP (the BWP used by DL). For a UE, one or more BWPs can be set within a single carrier.

[0357] At least one of the configured BWPs can be active, and the UE may not intend to transmit or receive specific signals / channels outside of the active BWPs. Additionally, terms such as "cell" and "carrier" in this disclosure can be replaced with "BWP".

[0358] Furthermore, the above-described constructions of radio frames, subframes, time slots, mini-time slots, and symbols are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc., can be varied in various ways.

[0359] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​with respect to a specific value, or other corresponding information. For example, wireless resources can also be indicated by a specific index.

[0360] The names used for parameters, etc., in this disclosure are not limiting names at any point. Furthermore, the formulas, etc., using these parameters may differ from those explicitly disclosed in this disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, therefore the various names assigned to these various channels and information elements are not limiting names at any point.

[0361] The information, signals, etc., described in this disclosure can also be represented using one of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which can be mentioned throughout the foregoing description, can also be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0362] Furthermore, information and signals can be output from higher layers (upper level) to lower layers (lower level), and from lower layers to higher layers, at least in one of these directions. Information and signals can also be input and output via multiple network nodes.

[0363] Input and output information and signals can be stored in a specific location (e.g., memory) or managed using a management table. Input and output information and signals can be overwritten, updated, or recorded. Output information and signals can also be deleted. Input information and signals can also be sent to other devices.

[0364] The notification of information is not limited to the methods / implementations described in this disclosure, and other methods may also be used. For example, the notification of information in this disclosure may also be implemented through physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI), etc.), higher layer signaling (e.g., radio resource control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), medium access control (MAC) signaling), other signals, or combinations thereof.

[0365] In addition, physical layer signaling can also be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can also be referred to as RRC messages, such as RRC connection setup messages, RRC connection reconfiguration messages, etc. Additionally, MAC signaling can also be notified using, for example, the MAC control element (CE).

[0366] Furthermore, notification of specific information (e.g., a notification that “is X”) is not limited to explicit notification, but can also be implicit (e.g., by not providing that specific information or by providing other information).

[0367] The determination can be made by a value represented by 1 bit (0 or 1), by a true or false value (boolean), or by a comparison of values ​​(e.g., by comparison with a specific value).

[0368] Whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0369] Furthermore, software, instructions, and information can also be sent and received via a transmission medium. For example, when software is sent from a website, server, or other remote source using at least one of wired technologies (coaxial cable, optical fiber, twisted pair, Digital Subscriber Line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0370] The terms “system” and “network” as used in this disclosure are used interchangeably. “Network” may also mean devices included in a network (e.g., base stations).

[0371] In this disclosure, the terms “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”, “beamwidth”, “beam angle”, “antenna”, “antenna element”, and “panel” can be used interchangeably.

[0372] In this disclosure, the terms "Base Station (BS)", "wireless base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. Base stations are also sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

[0373] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its overall coverage area can be divided into several smaller areas, each of which can provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​the base station providing communication services within that coverage area, or to at least one of the base station subsystems.

[0374] In this disclosure, the terms “Mobile Station (MS)”, “user terminal”, “user equipment (UE)”, and “terminal” can be used interchangeably.

[0375] Mobile stations are also sometimes referred to as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other appropriate terms.

[0376] At least one of the base station and the mobile station can also be referred to as a transmitting device, a receiving device, a wireless communication device, etc. Additionally, at least one of the base station and the mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. This mobile body can be a vehicle (e.g., a car, an airplane, etc.), a mobile body moving in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (humanized or unmanned). Furthermore, at least one of the base station and the mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can also be an Internet of Things (IoT) device such as a sensor.

[0377] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, various methods / implementations of this disclosure can be applied to structures where communication between the base station and the user terminal is replaced by communication between multiple user terminals (e.g., also referred to as device-to-device (D2D) or vehicle-to-everything (V2X)). In this case, the user terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0378] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station 10 can also be configured to have the functions of the user terminal 20 described above.

[0379] In this disclosure, operations purported to be performed by the base station may sometimes be performed by its upper node, depending on the circumstances. In a network containing one or more network nodes having a base station, various operations for communication with a terminal can obviously be performed by the base station, one or more network nodes other than the base station (e.g., consider a Mobility Management Entity (MME) such as a Serving-Gateway (S-GW), but not limited to this), or a combination thereof.

[0380] The various methods / implementations described in this disclosure can be used individually, in combination, or switched during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this disclosure can be rearranged as long as there are no contradictions. For example, for the methods described in this disclosure, various steps are indicated using an illustrative order, and the order is not limited to the specific order indicated.

[0381] The various methods / implementations described in this disclosure can also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Futuregeneration radio access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), systems utilizing other appropriate wireless communication methods, and next-generation systems extended from them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G, etc.) for application.

[0382] Unless otherwise expressly stated, the use of the word "based on" in this disclosure does not imply "based on only". In other words, the use of the word "based on" implies both "based on only" and "based on at least".

[0383] Any reference to elements using terms such as "first," "second," etc., as used in this disclosure is not intended to definitively limit the quantity or order of these elements. These designations are used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to "first" and "second" elements do not imply that only two elements can be used, or that in some form the first element must precede the second element.

[0384] The term "determining" as used in this disclosure sometimes encompasses a wide variety of operations. For example, "determining" can also be considered as making a "determination" regarding judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), ascertaining, etc.

[0385] In addition, "judgment (decision)" can also be regarded as making "judgments (decision)" on receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), etc.

[0386] Furthermore, "judgment (decision)" can also be seen as making "judgments (decisions)" regarding resolving, selecting, choosing, establishing, and comparing. In other words, "judgment (decision)" can also be seen as making "judgments (decisions)" regarding certain operations.

[0387] In addition, "judgment (decision)" can also be replaced with "assuming", "expecting", "considering", etc.

[0388] The term "maximum transmit power" as used in this disclosure can mean the maximum value of the transmit power, the nominal maximum transmit power (the nominal UE maximum transmit power), or the rated maximum transmit power (the rated UE maximum transmit power).

[0389] As used in this disclosure, the terms “connected,” “coupled,” or any variations thereof mean any direct or indirect connection or combination between two or more elements, and can include the existence of one or more intermediate elements between two elements that are “connected” or “coupled.” The combination or connection between elements can be physical, logical, or a combination thereof. For example, “connected” can also be replaced with “access.”

[0390] In this disclosure, when connecting two elements, it is possible to use more than one wire, cable, printed electrical connection, etc., and as some non-limiting and non-inclusive examples, to use electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, and optical (both visible and invisible) domains, so that they can be "connected" or "combined" with each other.

[0391] In this disclosure, the term "A is different from B" can also mean "A and B are different from each other." Additionally, the term can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0392] In this disclosure, the terms "include," "including," and variations thereof are used in the same way as the term "comprising," meaning inclusive. Furthermore, the term "or" as used in this disclosure means not XOR.

[0393] In this disclosure, where articles are added due to translation, such as in English (e.g., a, an, and the), this disclosure may also include nouns following these articles in plural form.

[0394] The invention disclosed herein has been described in detail above. However, it will be apparent to those skilled in the art that the invention is not limited to the embodiments described herein. The invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined by the claims. Therefore, the description herein is for illustrative purposes only and has no limiting meaning regarding the invention.

Claims

1. A terminal, comprising: The receiving unit receives settings for multiple groups of resources used for channel measurement associated with multiple transmit / receive points, i.e., multiple TRPs; and Based on the settings and higher-level parameters, the control unit determines one of the individual reports for the multiple TRPs and one of the reports in the multiple TRPs. In the case where the setting includes a first set of resources having the plurality of groups and a second set of CSI-interference measurement resources, i.e., CSI-IM resources, the determined report includes a CSI-reference signal resource, i.e., a CSI-RS resource indicator k, which corresponds to the (k+1)th resource in the first set and the (k+1)th resource in the second set.

2. The terminal according to claim 1, wherein, The multiple TRPs are used for incoherent joint transmission.

3. A wireless communication method, which is a wireless communication method for a terminal, comprising: The steps of setting up multiple groups of resources for channel measurement associated with multiple transmit / receive points, i.e., multiple TRPs; and Based on the aforementioned settings and high-level parameters, the steps for determining individual reports for the multiple TRPs and one of the reports for the multiple TRPs are as follows: In the case where the setting includes a first set of resources having the plurality of groups and a second set of CSI-interference measurement resources, i.e., CSI-IM resources, the determined report includes a CSI-reference signal resource, i.e., a CSI-RS resource indicator k, which corresponds to the (k+1)th resource in the first set and the (k+1)th resource in the second set.

4. A base station, comprising: The transmitting unit transmits settings for multiple groups of resources associated with multiple transmit / receive points, i.e., multiple TRPs, for channel measurements; and Based on the settings and higher-level parameters, the control unit determines whether to receive individual reports for the multiple TRPs and one of the reports for the multiple TRPs. In the case where the setting includes a first set of resources having the plurality of groups and a second set of CSI-interference measurement resources, i.e., CSI-IM resources, the determined report includes a CSI-reference signal resource, i.e., a CSI-RS resource indicator k, which corresponds to the (k+1)th resource in the first set and the (k+1)th resource in the second set.

5. A system comprising a terminal and a base station, The terminal has: The receiving unit receives settings for multiple groups of resources used for channel measurement associated with multiple transmit / receive points, i.e., multiple TRPs; and Based on the settings and higher-level parameters, the control unit determines one of the individual reports for the multiple TRPs and one of the reports in the multiple TRPs. In the case where the setting includes a first set of resources having the plurality of groups and a second set of CSI-interference measurement resources, i.e., CSI-IM resources, the determined report includes a CSI-reference signal resource, i.e., a CSI-RS resource indicator k, which corresponds to the (k+1)th resource in the first set and the (k+1)th resource in the second set. The base station sends the settings.

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