CN117178527A

CN117178527A - Terminal, wireless communication method and base station

Info

Publication number: CN117178527A
Application number: CN202280029455.9A
Authority: CN
Inventors: 松村祐辉; 永田聪; 王静; 陈岚
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2021-04-23
Filing date: 2022-03-29
Publication date: 2023-12-05
Also published as: WO2022224750A1

Abstract

Measurement and reporting of channel state information, i.e., CSI, is suitably performed. The terminal according to one aspect of the present disclosure includes: a receiving unit that receives setting information for a first channel measurement resource related to a first channel measurement resource group and a second channel measurement resource related to a second channel measurement resource group; and a control unit that performs control based on a certain assumption for interference measurement based on a non-zero power channel state information reference signal, NZP CSI-RS, used for a single transmission reception point measurement hypothesis, STRP measurement hypothesis.

Description

Terminal, wireless communication method and base station

Technical Field

The present disclosure relates to a terminal, a wireless communication method, and a base station in a next generation mobile communication system.

Background

In a universal mobile telecommunications system (Universal Mobile Telecommunications System (UMTS)) network, long term evolution (Long Term Evolution (LTE)) has been standardized for the purpose of further high-speed data rates, low latency, and the like (non-patent document 1). Further, for the purpose of further large capacity, high altitude, and the like of LTE (third generation partnership project (Third Generation Partnership Project (3 GPP)) Release (rel.) 8, 9), LTE-Advanced (3 GPP rel.10-14) has been standardized.

Subsequent systems of LTE (e.g., also referred to as fifth generation mobile communication system (5 th generation mobile communication system (5G)), 5g+ (plus), sixth generation mobile communication system (6 th generation mobile communication system (6G)), new Radio (NR)), 3gpp rel.15 later, and the like are also being studied.

Prior art literature

Non-patent literature

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) ", 4 th 2010

Disclosure of Invention

Problems to be solved by the invention

In future wireless communication systems (e.g., NR), one or more Transmission/Reception points (TRPs)) are being studied for DL Transmission (e.g., PDSCH Transmission) to User terminals (User terminals, user Equipments (UEs)) using one or more panels (multi-panels).

However, in the standard of the existing wireless communication system, there is a point where it is unclear how to perform measurement reporting of channel state information (Channel State Information (CSI)) in the case where a multi-panel/TRP is used. If the CSI measurement report cannot be properly performed, there is a concern that system performance is degraded, such as a decrease in throughput.

It is, therefore, one of the objects of the present disclosure to provide a terminal, a wireless communication method, and a base station that appropriately perform measurement and reporting of CSI.

Means for solving the problems

The terminal according to one aspect of the present disclosure includes: a receiving unit that receives setting information for a first channel measurement resource related to a first channel measurement resource group and a second channel measurement resource related to a second channel measurement resource group; and a control unit that performs control based on a certain assumption for interference measurement based on a non-zero power channel state information reference signal, NZP CSI-RS, used for a single transmission reception point measurement hypothesis, STRP measurement hypothesis.

ADVANTAGEOUS EFFECTS OF INVENTION

According to an aspect of the present disclosure, measurement and reporting of CSI can be performed appropriately.

Drawings

Fig. 1 is a diagram showing CSI report setting (CSI-ReportConfig) of 3gpp rel.16.

Fig. 2 is a diagram showing a first example of CSI report setting related to implicit IMR setting.

Fig. 3 is a diagram showing a second example of CSI report setting related to implicit IMR setting.

Fig. 4 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.1.1.

Fig. 5 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.1.2.

Fig. 6 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.2.

Fig. 7 is a diagram showing another example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.2.

Fig. 8 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.3.

Fig. 9 is a diagram showing an example of QCL estimation of CSI-IM/NZP-IM in the second embodiment.

Fig. 10 is a diagram showing an example of QCL estimation of CSI-IM/NZP-IM in the second embodiment.

Fig. 11 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 3.1.

Fig. 12 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 3.2.

Fig. 13A to 13C are diagrams showing an example of a change in setting of NZP-IM.

Fig. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment.

Fig. 17 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment.

Detailed Description

(CSI reporting or reporting)

In rel.15nr, a terminal (also referred to as a User terminal, user Equipment (UE), or the like) generates (also referred to as determining, calculating, estimating, measuring, or the like) channel state information (Channel State Information (CSI)) based on a Reference Signal (RS) (or resources for the RS), and transmits (also referred to as reporting, feeding back, or the like) the generated CSI to a network (e.g., a base station). The CSI may also be transmitted to the base station using, for example, an uplink control channel (e.g., a physical uplink control channel (Physical Uplink Control Channel (PUCCH))) or an uplink shared channel (e.g., a physical uplink shared channel (Physical Uplink Shared Channel (PUSCH)).

The RS used for generating CSI may be at least one of a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), a synchronization signal/broadcast channel (synchronization signal/physical broadcast channel (Synchronization Signal/Physical Broadcast Channel (SS/PBCH))) block, a synchronization signal (Synchronization Signal (SS)), a demodulation reference signal (DeModulation Reference Signal (DMRS)), and the like, for example.

The CSI-RS may also include at least one of Non Zero Power (NZP) CSI-RS and CSI-interference management (CSI-Interference Management (CSI-IM)). The SS/PBCH block is a block including an SS and a PBCH (and a corresponding DMRS), and may be also referred to as an SS block (SSB) or the like. The SS may include at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSs)).

The CSI may include at least one SNR such as a channel quality Indicator (Channel Quality Indicator (CQI)), a precoding matrix Indicator (Precoding Matrix Indicator (PMI)), a CSI-RS resource Indicator (CSI-RS Resource Indicator (CRI)), an SS/PBCH block resource Indicator (SS/PBCH Block Resource Indicator (SSBRI)), a Layer Indicator (LI)), a Rank Indicator (RI)), an L1-RSRP (reference signal received power (Layer 1Reference Signal Received Power) in Layer 1), an L1-RSRQ (reference signal received quality (Reference Signal Received Quality)), an L1-SINR (signal to interference plus noise ratio (Signal to Interference plus Noise Ratio)), and an L1-SNR (signal to noise ratio (Signal to Noise Ratio).

The UE may also receive information related to CSI reporting (report setting (report configuration) information) and control CSI reporting based on the report setting information. The report setting information may be "CSI-ReportConfig" of an information element (Information Element (IE)) of radio resource control (Radio Resource Control (RRC)), for example. In addition, in the present disclosure, the RRC IE may also be replaced with an RRC parameter, a higher layer parameter, or the like.

The report setting information (e.g., "CSI-ReportConfig" of the RRC IE) may also include at least one of the following, for example.

Information about the type of CSI report (report type information, e.g. "reportConfigType" of RRC IE)

Information about one or more amounts (quality) of CSI to be reported (one or more CSI parameters) (reporting amount information, e.g. "reportquality" of RRC IE)

Information on RS resources used for generating the quantity (the CSI parameter) (resource information, for example, "CSI-ResourceConfigId" of RRC IE)

Information on the frequency domain (frequency domain) that is the object of CSI reporting (frequency domain information, e.g. "reportFreqConfiguration" of RRC IE)

For example, the report type information may also represent (indicate) Periodic CSI (P-CSI)) reports, aperiodic CSI (a-CSI)) reports, or Semi-Persistent CSI (Semi-Persistent) reports.

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

The resource information may be an ID of the RS resource. The RS resources may include, for example, non-zero power CSI-RS resources, SSBs, and CSI-IM resources (e.g., zero power CSI-RS resources).

In addition, the frequency domain information may also represent a frequency granularity of CSI reporting (frequency granularity). The frequency granularity may also comprise, for example, wideband and sub-band. The wideband is the CSI reporting band whole (entire CSI reporting band). The Bandwidth may be, for example, the entire (partial) carrier (component carrier (Component Carrier (CC)), cell, serving cell), or the entire Bandwidth portion (BWP) within a carrier. The wideband may also be replaced by CSI reporting band, CSI reporting band whole (whole CSI reporting band (entire CSI reporting band)), etc.

The subband may be a part of a wideband, and may be composed of one or more Resource Blocks (RB) or physical Resource blocks (Physical Resource Block (PRB)). The size of the sub-band may also be determined according to the size of the BWP (PRB number).

The frequency domain information may indicate which PMI of the wideband or subband is reported (the frequency domain information may include, for example, "PMI-format indicator" of the RRC IE used to determine either wideband PMI report or subband PMI report). The UE may determine the frequency granularity of the CSI report (i.e., any one of wideband PMI report and subband PMI report) based on at least one of the report amount information and the frequency domain information.

When wideband PMI reporting is set (determined), one wideband PMI may be reported for CSI reporting band entire use. On the other hand, in the case of the set subband PMI report, a single wideband indicator (single wideband indication) i may be reported for CSI reporting band entire use ₁ And is reported a subband indication (one subband indication) i for each of more than one subband within the CSI report as a whole ₂ (e.g., a subband indication for each subband).

The UE may also perform Channel estimation (Channel estimation)/interference measurement using the received RS (or the set Channel measurement/interference measurement resource) and estimate a Channel matrix (Channel matrix) H. The UE feeds back an index (CQI, PMI, etc.) determined based on the estimated channel matrix.

PMI may also represent a precoder matrix (also simply referred to as precoder) that the UE deems suitable for Downlink (DL)) transmission for the UE. The values of PMI may also correspond to one precoder matrix. The set of values of PMI may also correspond to a set of different precoder matrices called precoder codebooks (also simply codebooks).

In the spatial domain (space domain), the CSI report may also contain more than one type of CSI. For example, the CSI may also include at least one of a first type (type 1 CSI) used in the selection of the single beam and a second type (type 2 CSI) used in the selection of the multi-beam. Single beams may be replaced with a single layer and multiple beams may be replaced with multiple beams. Furthermore, type 1CSI may not contemplate multi-user multiple input multiple output (multiple input multiple outpiut (MIMO)), and type 2CSI may also contemplate multi-user MIMO.

The codebook may include a codebook for type 1CSI (also referred to as a type 1 codebook or the like) and a codebook for type 2CSI (also referred to as a type 2 codebook or the like). The type 1CSI may include type 1 single-panel CSI and type 1 multi-panel CSI, or may be defined by different codebooks (type 1 single-panel codebook and type 1 multi-panel codebook).

In this disclosure, type 1 and type I may also be interchanged. In the present disclosure, type 2 and type II may also be replaced with each other.

The Uplink Control Information (UCI) type may also include at least one of hybrid automatic repeat request acknowledgement (Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), scheduling request (scheduling request (SR)), and CSI. UCI may be carried either through PUCCH or PUSCH.

In rel.15nr, UCI can contain one CSI part for wideband PMI feedback. CSI report #n includes PMI wideband information when reported.

In rel.15nr, UCI can contain two CSI parts for subband PMI feedback. CSI part 1 contains wideband PMI information. The CSI part 2 contains one wideband PMI information and several sub-band PMI information. CSI part 1 and CSI part 2 are separated and encoded.

In rel.15nr, the UE sets a reporting setting (setting) of N (n≡1) CSI reporting settings and a resource setting of M (m≡1) CSI resource settings by higher layers. For example, the CSI report setting (CSI-ReportConfig) includes a channel measurement resource setting (resource allocation), an interference CSI-IM resource setting (CSI-IM-resource allocation), an interference NZP-CSI-RS setting (NZP-CSI-RS-resource allocation), a report amount (reportquality), and the like. The channel measurement resource setting, the interference CSI-IM resource setting, and the interference NZP-CSI-RS setting are associated with a CSI resource setting (CSI-ResourceConfig, CSI-ResourceConfigId), respectively. The CSI resource settings contain a list of CSI-RS-resourcesist (e.g., NZP-CSI-RS resource set or CSI-IM resource set).

Specific example of CSI report setup

Fig. 1 is a diagram showing CSI report setting (CSI-ReportConfig) of 3gpp rel.16. As shown in fig. 1, CSI report settings, which are information elements of RRC, are set resourcesForChannelMeasurement (CMR), CSI-IM-resource allocation (ZP-IMR), NZP-CSI-RS-resource allocation (NZP-IMR), reportConfigType, and the like. reportConfigType contains periodic, semiPersistentOnPUCCH, semiPersistentOnPUSCH, aperiodic.

< aperiodic CSI >)

In the case of aperiodic CSI, each trigger state set using the higher-layer parameter "CSI-aperictriggerstate" is associated with one or more CSI report settings (CSI-ReportConfig). Each CSI report setting is linked with a periodic, semi-persistent or aperiodic resource setting (resource setting).

When one resource setting is set, the resource setting (given by a higher layer parameter resource is used for channel measurement for L1-RSRP or L1-SINR calculation).

When two resource settings are set, the first resource setting (assigned by the higher-layer parameter resource-f iotaeldmeasurement) is for channel measurement, and the second resource setting (assigned by the higher-layer parameter CSI-IM-resource-f iotanterface or NZP-CSI-RS-resource-f iotanterface) is for interference measurement performed by CSI-IM or NZP-CSI-RS.

When three resource settings are configured, the first resource setting (assigned by the higher-layer parameter resource establishment) is for channel measurement, the second resource setting (assigned by the higher-layer parameter CSI-IM-resource establishment) is for interference measurement based on CSI-IM, and the third resource setting (assigned by the higher-layer parameter NZP-CSI-RS-resource establishment) is for interference measurement based on NZP-CSI-RS.

In addition, in the present disclosure, CSI-RS resources for interference measurement may also be referred to as Non Zero Power (NZP)) -IMR, NZP-IM. Furthermore, in the present disclosure, CSI-IM and CSI-IMR may also be replaced with each other.

Where aperiodic CSI is applied, NR may also support interference measurements based on ZP-CSI-RS only, NZP-CSI-RS only, and ZP-CSI-RS and NZP-CSI-RS only.

< periodic or semi-persistent CSI >)

In case of being applied with periodic or semi-persistent CSI, each CSI reporting setting (CSI-ReportConfig) is linked with a periodic or semi-persistent resource setting (resource setting).

When one resource setting (assigned by a higher-level parameter resource measurement) is set, the resource setting is for channel measurement by L1-RSRP calculation.

When two resource settings are set, the first resource setting (assigned by the higher-layer parameter resource-sfhannelessary) is for channel measurement, and the second resource setting (assigned by the higher-layer parameter CSI-IM-resource-sfronterface) is for interference measurement performed by CSI-IM.

Where periodic or semi-persistent CSI is applied, NR may also support only ZP-CSI-RS based interference measurements.

CMR and IMR >

The CSI-IM resource for interference measurement, the NZP-CSI-RS resource for interference measurement, and the NZP-CSI-RS resource for channel measurement are set by a high-layer signaling for setting one or more CSI resources for channel and interference measurement.

The UE may be configured to set one NZP-CSI-RS resource for CSI reporting and one CSI-IM resource for interference measurement to a quasic-Co-Location (QCL) type D (QCL-D), and QCL (Quasi-Co-located (QCLed)) for each resource.

That is, in the case where the ZP-CSI-RS based interference measurement is applied, the UE may also assume that the same reception beam as the beam indicated as the channel measurement beam by the base station (gNB) is used for the interference measurement.

The UE may be configured to set one CSI-reporting NZP-CSI-RS resource for channel measurement and one CSI-IM resource or one NZP-CSI-RS resource for interference measurement as QCL for QCL-D.

In the case of using CSI-IM for interference measurement, each CSI-RS resource of channel measurement is associated with a CSI-IM resource in resource units according to the ordering of CSI-RS resources and CSI-IM resources within the corresponding resource set. The number of CSI-RS resources for channel measurement may be the same as the number of CSI-IM resources.

In the case of interference measurement by ZP-CSI-RS, CSI-RS resources for channel measurement (channel measurement resources (Channel Measurement Resource (CMR))) and CSI-RS resources for interference measurement (interference management resources (Interference Management Resource (IMR))), which may also be referred to as interference measurement resources (Interference Measurement Resource (IMR))), are associated for each resource. I.e. a one-to-one mapping.

K is set in the corresponding resource set for channel measurement _S In the case of > 1 resources, the UE needs to derive CSI parameters other than CRI conditioned on the reported CRI. CRI k (k+.0) corresponds to an entry set to the (k+1) -th item of the associated nzp-CSI-RSResource in the corresponding nzp-CSI-RS-Resource set for channel measurement, and corresponds to an entry set to the (k+1) -th item of the associated CSI-IM-Resource in the corresponding CSI-IM-Resource set (when set).

That is, CRI k (k+.0) corresponds to CMR set at (k+1) th and IMR set at (k+1) th.

(multiple TRP)

In NR, one or more Transmission/Reception points (TRP) (multi TRP (MTRP)) are being studied to DL transmit a UE using one or more panels (multi TRP). Furthermore, the UE is being studied to UL transmit one or more TRPs using one or more panels.

In addition, the plurality of TRPs may correspond to the same cell identifier (cell Identifier (ID)) or may correspond to different cell IDs. The cell ID may be either a physical cell ID or a virtual cell ID.

The multi-TRP (TRP #1, # 2) may also be connected by an ideal/non-ideal backhaul (backhaul) and exchanged information, data, etc. Different Code Words (CW) and different layers may be transmitted from each TRP of the multiple TRPs. As a scheme of the multi-TRP transmission, incoherent joint transmission (Non-Coherent Joint Transmission (NCJT)) may be used.

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

In addition, the plurality of PDSCH (multiple PDSCH) subject to NCJT may be defined as partially or completely overlapping with respect to at least one of the time domain and the frequency domain. That is, at least one of time and frequency resources of the first PDSCH from the first TRP and the second PDSCH from the second TRP may also overlap.

It is also conceivable that these first PDSCH and second PDSCH are not in a Quasi Co-located (QCL) relationship (non-Quasi Co-located). The reception of multiple PDSCH may also be replaced with simultaneous reception of PDSCH that is not of a certain QCL type (e.g., QCL type D).

Multiple PDSCH from multiple TRP (may also be referred to as multiple PDSCH (multiple PDSCH)) may also be scheduled (single primary mode) using one DCI (single DCI (S-DCI), single PDCCH). One DCI may also be transmitted from one TRP of the multiple TRPs. Multiple PDSCH from multiple TRP may be scheduled (multiple main mode) using multiple DCI (M-DCI), multiple PDCCH (multiple PDCCH)). Multiple DCIs may also be transmitted from multiple TRPs, respectively. The UE may also envisage transmitting different CSI reports (CSI reports) associated with the respective TRPs for the different TRPs. Such CSI feedback may also be referred to as individual feedback, individual CSI feedback, etc. In this disclosure, "separate" may also be replaced with "independent".

In addition, CSI feedback that transmits CSI reports related to both TRPs to one TRP may be used. Such CSI feedback may also be referred to as joint feedback, joint CSI feedback, etc.

For example, in the case of separate feedback, the UE is set to transmit CSI reports for TRP #1 using a certain PUCCH (PUCCH 1) for TRP #1 and transmit CSI reports for TRP #2 using another PUCCH (PUCCH 2) for TRP # 2. In case of joint feedback, the UE transmits CSI reports for trp#1 and CSI reports for trp#2 to trp#1 or trp#2.

According to such a multi-TRP scenario, more flexible transmission control using a channel of good quality can be performed.

For multi-TRP transmission, CSI for a plurality of different TRPs is often different, and therefore, it is not clear how to measure and report CSI for a plurality of different TRPs. The precondition of channel/interference for one TRP varies depending on the decision (traffic) of transmission of the surrounding TRP.

For example, CSI reports for individual feedback (may also be referred to as individual CSI reports) may also be set using one CSI report setting (CSI-ReportConfig) associated with one TRP.

The CSI reporting setting may also correspond to a precondition for one interference for one TRP (i.e., different CSI reporting settings may also be used per TRP, per interference precondition). The CSI report setting may correspond to a precondition for a plurality of interferences with respect to one TRP (that is, different CSI report settings may be used for each TRP, and one CSI report setting may be associated with a precondition for a plurality of interferences with respect to a certain TRP).

Further, for example, CSI reports for joint feedback (may also be referred to as joint CSI reports) may also be set using one CSI report setting (CSI-ReportConfig) associated with a plurality of TRPs.

The CSI report setting may correspond to one interference premise for each of the plurality of TRP (that is, the CSI report including the CSI for the interference premise #1 of TRP #1 and the CSI for the interference premise #1 of TRP #2 may be set using a certain CSI report setting, and the CSI report including the CSI for the interference premise #2 of TRP #1 and the CSI for the interference premise #1 of TRP #2 may be set using another CSI report setting). The CSI report setting may correspond to a plurality of interference hypotheses for each of the plurality of TRPs (that is, CSI reports including two CSI for interference hypotheses #1 and #2 of TRP #1 and two CSI for interference hypotheses #3 and #4 of TRP #2 may be set using one CSI report setting).

The CSI report setting for the joint CSI report may include a resource setting (at least one of a channel measurement resource setting, an interference CSI-IM resource setting, and an interference NZP-CSI-RS setting) for each TRP. The resource setting of a certain TRP may be set by including the resource setting group (resource setting group)).

The resource setting group may be identified by the set resource setting group index. The resource setting group may be replaced with the reporting group. The resource set group index (may also be simply referred to as a group index) may also indicate to which TRP a CSI report associated with the TRP (a certain CSI report (or CSI report set, CSI resource set, CSI-RS resource, TCI status, QCL, etc.) corresponds. For example, the group index #i may correspond to TRP #i.

CSI reporting settings for individual CSI reporting may also be referred to as individual CSI reporting settings, individual CSI settings, etc. CSI reporting settings for joint CSI reporting may also be referred to as joint CSI reporting settings, joint CSI settings, etc.

(implicit IMR setting)

Rel.17NR is oriented, and efficient setting methods of CMR/IMR are further studied.

For example, for joint CSI reporting, CMR for a certain CSI (TRP) may also be equivalent to IMR for other CSI (TRP). According to this structure, it is expected that two CSI included in the joint CSI report for NCJT transmission better conform to actual inter-TRP interference (sufficiently accurate for direct scheduling). Furthermore, no further CSI update is required through the network implementation.

The UE may also assume that an explicit IMR setting for inter-TRP interference is not performed for a certain CSI report setting (joint CSI setting). In this case, the assumption of additional IMR in the case where the joint CSI setting is set may be defined by the specification.

For example, in the joint CSI setting, it is also conceivable that CMR for a certain TRP (resources specified by resource for measurement) is included in additional NZP-IMR (or the same) for other TRP (CMR) in addition to or instead of explicit ZP-IMR/NZP-IMR. Here, the NZP-IMR for the addition of the other TRP is not explicitly set.

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

Fig. 2 is a diagram showing a first example of CSI report setting related to implicit IMR setting. In fig. 2, NZP-IMR for TRP #1 is not explicitly set SSB/CSI-RS id=y, and NZP-IMR for TRP #2 is not explicitly set SSB/CSI-RS id=x.

Even without explicit NZP-IMR settings, the UE may assume that SSB/CSI-RS id=y of the CMR corresponding to trp#2 corresponds to NZP-IMR of trp#1, or that SSB/CSI-RS id=x of the CMR corresponding to trp#1 corresponds to NZP-IMR of trp#2. The UE may also implement channel/interference measurements, etc., based on these assumptions and perform joint CSI reporting.

Fig. 3 is a diagram showing a second example of CSI report setting related to implicit IMR setting. Fig. 3 is similar to fig. 2, and thus, a repetitive description is not made. Fig. 3 differs from fig. 2 in that ZP-IMR and NZP-IMR are commonly set (in a shared manner) in two TRPs.

The UE may use the commonly set NZP-IMR and the SSB/CSI-RS id=y corresponding to the CMR of trp#2 as the NZP-IMR of trp#1. The UE may use the commonly set NZP-IMR and SSB/CSI-RS id=x corresponding to the CMR of trp#1 as the NZP-IMR of trp#2.

In addition, the present disclosure may also be applied to individual CSI reporting (individual CSI reporting settings). Further, in the present disclosure, the correspondence of ZP-IMR/NZP-IMR with the corresponding one or more CMRs, the corresponding one or more CSI-IMs, etc. may also be set explicitly (e.g., by higher layer signaling) to the UE.

(CMR pair, CMR group)

In order to realize a more dynamic channel/interference premise (hypotheses) for NCJT for both the first Frequency band (Frequency Range 1 (FR 1)) and the second Frequency band (Frequency Range 2 (FR 2))), evaluation and regulation of CSI reports for transmission of at least one of multiple TRP and multiple panels of DL are being studied.

For MTRP, it is preferable that Single TRP (STRP) transmission and MTRP transmission are dynamically switched according to channel states and the like. For this, the following CSI was obtained:

let us consider CSI (hereinafter also referred to as csi_a) for TRP1 (first TRP) transmitted by STRP,

Let us consider the CSI sent by STRP for TRP2 (second TRP) (hereinafter also referred to as csi_b),

TRP 1-oriented CSI (hereinafter, also referred to as csi_c) taking into account TRP/inter-beam interference from TRP2, which is assumed to be transmitted by NCJT of MTRP,

TRP 2-oriented CSI (hereinafter, also referred to as csi_d) that considers TRP/inter-beam interference from TRP1, which is assumed to be transmitted by NCJT of MTRP.

For CSI measurements associated with CSI reporting settings for NCJT, the UE may also be set to K in the CSI-RS resource set for CMR _s And (here, K _s N (where N is an integer, for example, a value of 1 or more) NZP CSI-RS resource pairs (also referred to as CMR pairs, beam pairs, CSI peering) may be set. In addition, each resource pair is used for NCJT measurement assumption (hypothesis. May also be referred to as premise or assumption). At least n=1 and K may also be supported _s ＝2。

The UE may be configured with two CMR groups (a first CMR group and a second CMR group), for example. The first CMR group contains K ₁ The second CMR group contains K ₂ And CMRs. K (K) ₁ +K ₂ ＝K _s 。

The UE may also be set with one or more CMR group setting information through RRC signaling. The one CMR group setting information may include information indicating CMRs included in one CMR group (in other words, may correspond to one TRP), or may include information indicating CMRs included in each of a plurality of CMR groups (in other words, may correspond to a plurality of TRPs).

The UE may also be set with information of which CMR group the CMR belongs to through RRC signaling. In this case, even if the above-described CMR group setting information does not exist, the UE can determine the CMR included in the CMR group.

In addition, K ₁ K is as follows ₂ May be the same value (K ₁ ＝K ₂ ) May be of different values (K ₁ ≠K ₂ ). The two CMR groups may correspond to two TRPs of the MTRP, respectively, or one may correspond to the MTRP and the other to the STRP.

The CMR used for CSI measurement/reporting from the two CMR groups may also be determined by at least one of the following:

predetermined by specification. For example, K ₁ K is as follows ₂ Can also be used for both NCJT (MTRP) and the assumption of STRP measurements (hypothesis).

Is set/updated by at least one of RRC and MAC CE.

The N CMR pairs may also be selected from all possible pairs and set by higher layer signaling (e.g., RRC signaling, MAC CE, or a combination thereof).

In addition, the NCJT measurement assumption may also be considered separately from the STRP measurement assumption for the CPU/resource/port.

Regarding CSI reports associated with the assumption of MTRP measurement, which are set by one CSI report setting, the following two options are being studied:

Option 1: the UE may also be set to report X CSI associated with the STRP measurement hypothesis and one CSI associated with the NCJT measurement hypothesis,

option 2: the UE may also be set to report the highest one CSI associated with the NCJT and STRP measurement hypotheses.

Regarding option 1 above, X corresponds to the number of CSI associated with the STRP measurement hypothesis that should be reported, and X may be an integer or may be limited to a plurality of values. For example, X may be any of 0, 1, and 2. In case of x=2, X (=2) CSI may also be associated with two different STRP measurement hypotheses with CMR from different CMR groups.

In addition, the UE supporting option 1 may support CSI reporting following the values of a plurality of X (e.g., x=1, 2) or CSI reporting following the value of one X. Regarding option 1, reporting of one CSI associated with the NCJT measurement hypothesis may also be omitted (or not implemented).

With regard to option 2 above, recommended measurement hypotheses associated with CSI directions may also be reported from the UE to the network.

For N as the maximum value of N _max And as K _s K of the maximum value of (2) _s、max At least one of the following is also conceivable:

UE may also support N _max ＝2，

·UE：K _s、max X (where X may be X as described above or may be different from X as described above, X may be a specified number (e.g., 8) at most),

·N _max K is as follows _s、max May also be specified with a default value,

for satisfying N.ltoreq.N _max K is as follows _s ≤K _s、max N and K of (c) _s (or N) _max K is as follows _s、max ) May be defined as combinations supported by the UE or may be reported to the network using UE capabilities.

In the present disclosure, regarding whether or not interference measurement based on NZP CSI-RS other than CMR pair set for NCJT measurement assumption is supported in addition to interference measurement using CSI-IM, a case is assumed in which at least one of the following two (mainly the former) is:

interference measurements based on NZP CSI-RS other than the CMR pair described above are supported. In addition, the situation may also be that under certain conditions (e.g., n=a first number (e.g., 1) of CMR pairs are set, and K is set _s The case of=second number (e.g. 2) CMR resources (NZP CSI-RS resources) is envisaged.

Interference measurements based on NZP CSI-RS other than the above CMR pair are not supported.

In addition, K is as described above ₁ 、K ₂ 、K _s 、N、M、N _max 、K _s、max The UE may be determined in advance by a specification, may be set/notified by higher layer signaling/physical layer signaling, or may be determined based on UE capabilities.

However, in the NR specifications so far such as rel.15, the multi-panel/TRP has not been sufficiently considered, and therefore, there is a point where it is unclear how to perform measurement and reporting of CSI in the case where the multi-panel/TRP is used. For example, regarding option 1/2 described above, it is not clear as to whether to make NZP CSI-RS based interference measurements for STRP measurement hypotheses.

If CSI measurement and reporting cannot be performed properly, there is a concern that system performance may be degraded, such as reduced throughput. Accordingly, the inventors of the present invention have conceived a method for properly performing measurement and reporting of CSI for multiple panels/TRPs.

In addition, NCJT, MTRP, MTRP measurement, MTRP assumption, MTRP measurement assumption, etc. may also be replaced with each other in the present disclosure.

In addition, in the present disclosure, "first", "last", "first/last", "even number (in other words, the corresponding entry is even number or index)", "odd number (in other words, the corresponding entry is odd number or index)", "even number/odd number", and the like may also be replaced with each other.

Embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. The radio communication methods according to the embodiments may be applied individually or in combination.

In the present disclosure, "a/B", "at least one of a and B" may also be replaced with each other.

In the present disclosure, a panel, a beam, a panel group, a beam group, an Uplink (UL)) transmitting entity, TRP, spatial Relationship Information (SRI), spatial relationship, a control resource set (COntrol REsource SET (CORESET)), a physical downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a codeword, a base station, a specific antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), a specific antenna port group (e.g., DMRS port group), a specific group (e.g., code division multiplexing (Code Division Multiplexing (CDM)) group, a specific reference signal group, CORESET group, a specific resource (e.g., a specific reference signal resource), a specific resource set (e.g., a specific reference signal resource set), a CORESET pool, a PUCCH group (PUCCH resource group), a spatial relationship group, a downlink TCI state (DL TCI state), an Uplink TCI state (UL TCI state), a uniform TCI state (unified TCI state), and the like may also be replaced with each other.

The faceplate may also be associated with at least one of a group index of the SSB/CSI-RS group, a group index of the group-based beam report, a group index of the SSB/CSI-RS group for the group-based beam report.

In addition, the panel identifier (Identifier (ID)) and the panel may be replaced with each other. That is, TRP ID and TRP, CORESET ID and CORESET, and the like may be replaced with each other.

In the present disclosure, NCJT using multiple TRP, multiple PDSCH using NCJT, multiple PDSCH from multiple TRP, and the like may also be replaced with each other. In addition, the multiple PDSCH may mean a plurality of PDSCH in which at least a part of time resources (e.g., 1 symbol) are overlapped, may mean a plurality of PDSCH in which all of time resources (e.g., all symbols) are overlapped, may mean a plurality of PDSCH in which all of time resources are not overlapped, may mean a plurality of PDSCH carrying the same TB or the same CW, and may mean a plurality of PDSCH to which different UE beams (spatial domain reception filters, QCL parameters) are applied.

In the present disclosure, standard (normal) TRP, single TRP, S-TRP, single TRP system, single TRP transmission, single PDSCH may also be substituted for each other. In the present disclosure, the multi-TRP, MTRP, multi-TRP system, multi-TRP transmission, multi-PDSCH may also be replaced with each other. In the present disclosure, a single DCI, a single PDCCH, multiple TRP based on a single DCI, two TCI states at least one TCI code point being activated may also be replaced with each other.

In the present disclosure, a single TRP, a channel using one TCI state/spatial relationship, multiple TRPs not activated through RRC/DCI, multiple TCI states/spatial relationships not activated through RRC/DCI, CORESET Chi Suoyin (coresetpolindex) value of 1 not set for any CORESET and any code point of TCI field not mapped to two TCI states, communication with one transmission reception point, application of a single TRP may also be replaced with each other.

In this disclosure, "first TRP", "TRP #1", "first CORESET", "CORESET not provided with CORESET pool index or CORESET provided with CORESET pool index value=0" may also be replaced with each other. Further, "first CORESET" may also mean one or more first CORESETs.

In this disclosure, "second TRP", "trp#2", "second CORESET", "CORESET provided with CORESET pool index value=1" may also be replaced with each other. Further, "second CORESET" may also mean one or more second CORESETs.

In the present disclosure, the channel measurement resource setting, the channel measurement resource, the channel measurement CSI-RS resource, and the resourcesForChannelMeasurement, CMR, CMR resource may be replaced with each other.

In the present disclosure, CSI-IM resources, ZP-IMR resources, ZP-CSI-RS resources, CSI-IM resource settings for interference, CSI-IM based (CSI-IM based) resources for interference measurement, CSI-IM-resource interference, resources for interference measurement, and CSI-RS resources for interference measurement may also be replaced with each other.

In the present disclosure, NZP-IM resources (NZP-IMR), NZP-IMR resources, NZP-CSI-RS resources, NZP-CSI-RS resource settings for interference, NZP-CSI-RS based (NZP-CSI-RS based) resources for interference measurement, NZP-CSI-RS-resource for interference measurement, CSI-RS resources for interference measurement, and the like may also be replaced with each other.

In the present disclosure, CSI reports, CSI report settings, CSI settings, resource settings, etc. may also be replaced with each other. Further, in the present disclosure, support, control, enable control, operate, enable operation, execute, enable execution, etc. may also be substituted for each other.

FR1/2 of the present disclosure may also be replaced with any frequency band other than FR1/2, respectively.

In addition, in the present disclosure, a part of satisfaction, permission, equivalence, and the like may be replaced with the opposite meaning (for example, not satisfied, not permitted, not equivalent) (the remaining part not replaced may also retain the original meaning). That is, the present disclosure also covers what a part of conditions/situations are interpreted in the opposite sense.

(Wireless communication method)

< first embodiment >, first embodiment

The first embodiment corresponds to the case where NZP-IMR is set for NCJT. The first embodiment may also be applied to the case where interference measurement for NZP CSI-RS for CMR pair based on the NCJT measurement assumption in one CSI report setting is set to the UE through RRC signaling.

The first embodiment may be applied to a condition (e.g., n=a first number (e.g., 1) of CMR pairs are set, and K is set _s The case of=second number (e.g. 2) CMR resources (NZP CSI-RS resources) is applied. The first number and the second number are not limited to these values.

The first embodiment focuses on interference measurement based on NZP CSI-RS used for STRP measurement hypothesis, and is roughly classified into embodiments 1.1 to 1.3. In embodiments 1.1 to 1.3, the following controls (envisaged) are applied, respectively:

embodiment 1.1: the interference measurement based on the NZP CSI-RS is set only for the NCJT measurement hypothesis, and the interference measurement based on the NZP CSI-RS set for the STRP measurement hypothesis is not supported.

Embodiment 1.2: the NZP CSI-RS based interference measurement is also set for the STRP measurement hypothesis.

Embodiment 1.3: interference measurements based on NZP CSI-RS for STRP measurement hypotheses are activated by designating (correlating) RRC parameters for shared (shared) NZP CSI-RS for NCJT measurement hypotheses to be notified to the UE.

Embodiment 1.1

Embodiment 1.1 is further divided into three embodiments 1.1.1 to 1.1.3.

[ [ embodiment 1.1.1] ]

In embodiment 1.1.1, the control (assumption) of embodiment 1.1 is applied only to the case where the above option 1 is used and X is a specific value (for example, x=0). When option 1 is used but X is a value other than the specific value (for example, x=1, 2), or when option 2 is used, embodiment 1.1.2 or embodiment 1.1.3 may be applied.

With embodiment 1.1.1, the NZP-IMR may be set/applied also in the case where the NZP CSI-RS used only for the NCJT measurement hypothesis is set in the CSI report setting. Further, in the case where the NZP CSI-RS for the NCJT measurement hypothesis and the NZP CSI-RS for the STRP measurement hypothesis are set in the CSI report setting, the NZP-IMR is not allowed to be set/applied.

Fig. 4 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.1.1. This example corresponds to K _s Case=2, n=1, x=0. In this example, one CMR (cmr#0) is set for trp#1 (e.g., CMR group#1. The same applies to the subsequent drawings), and one CMR (cmr#1) is set for trp#2 (e.g., CMR group#2. The same applies to the subsequent drawings).

Cmr#0 and #1 (also referred to as CMR pairs (# 0, # 1) hereinafter, the same description is used for NCJT measurement hypothesis, and correspond (explicitly/implicitly correlate) to CSI-im#a and NZP-im#a. In addition, CMR pairing information for specifying CMR pairs for NCJT measurement hypothesis for two CMR groups may be set, updated, and notified to the UE by RRC/MAC CE/DCI.

The CMRs (CMR #0 and #1 in this example) corresponding to the same CSI-IM or the same NZP-IM may also correspond to a CMR pair. The same applies to the subsequent drawings.

Index #0, # a, etc. may be any integer, for example, and are not limited to the exemplified values. The same applies to the subsequent drawings.

The correspondence relationship may be set by being set (including the index of each) in the same CSI report setting, may be set by another RRC information element, or may be implicitly determined by another parameter or the like. The same applies to the subsequent drawings.

In fig. 4, CMRs #0 and #1 are set as CMRs for the NCJT measurement hypothesis, and CMRs for the STRP measurement hypothesis are not set. NZP-IM#A is used for NCJT measurement assumption.

The UE makes measurements based on the CMR pair from the two TRPs envisaged by the NCJT. The UE may also assume a one-to-one mapping between CMR and CSI-IM/NZP-CSI-RS associated with each TRP and perform channel measurement/interference measurement. The UE may also report more than one CSI related to the measurement results to the network.

[ [ embodiment 1.1.2] ]

In embodiment 1.1.2, the control (assumption) of embodiment 1.1 described above can also be applied in one or more of the following cases:

the case where option 1 is utilized and x=0,

the case where option 1 is utilized and x=1,

the case where option 1 is utilized and x=2,

the case of option 2 being utilized.

With respect to embodiment 1.1.2, NZP-IMR may also be set/applied only if NZP CSI-RS for NCJT measurement hypotheses only is set in CSI reporting settings. Further, in the case where the NZP CSI-RS for the NCJT measurement hypothesis and the NZP CSI-RS for the STRP measurement hypothesis are set in the CSI report setting, the NZP-IMR is not allowed to be set/applied.

Fig. 5 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.1.2. Note that the same points as in the example of fig. 4 may be used, and the description is not repeated (the same applies to the subsequent drawings). This example corresponds to K _s Case=4, n=1, x=2. In this example, two CMRs (cmr#0, # 1) are set for trp#1, and two CMRs (cmr#2, # 3) are set for trp#2.

Cmr#0 is used for STRP measurement hypothesis for trp#1, and corresponds to CSI-im#a. Cmr#2 is used for TRP measurement hypothesis for trp#2 and corresponds to CSI-im#b. This corresponds to a case where m=2 when the number of valid CMRs for STRP measurement hypotheses set in CSI report setting is expressed as M.

CMR pairs (# 1, # 3) are used for NCJT measurement hypotheses and correspond to CSI-im#c and NZP-im#a.

In fig. 5, no NZP-IM is set for the CMR used for the STRP measurement hypothesis. NZP-IM#A is used for NCJT measurement assumption.

[ [ embodiment 1.1.3] ]

In embodiment 1.1.3, in the case of embodiment 1.1.2, the control (assumption) of embodiment 1.1 is performed under the condition that the additional condition of the interference measurement for the STRP measurement hypothesis based on the NZP-IMR is not supported/supported. In other words, even in the case of the above-described embodiment 1.1.2, the UE can perform interference measurement for STRP measurement hypothesis by NZP-IMR when the conditions are not equivalent/equal to the additional conditions.

In embodiment 1.1.3, for example, when the number (for example, M) of valid CMRs for the STRP measurement hypothesis set in the CSI report setting is larger than M', the UE may assume that the NZP-IMR for the STRP measurement hypothesis is not set in the CSI report setting. In addition, in the present disclosure, M, M' and the like may be determined in advance by specifications, may be set/notified to the UE by higher layer signaling/physical layer signaling, or may be determined based on UE capabilities.

Embodiment 1.2

The control (assumption) of the above embodiment 1.2 can also be applied under certain conditions/situations. The condition may be a condition that Ks/K1/K2/X is a specific value, a condition that the number (e.g., M) of valid CMRs for STRP measurement hypothesis set in CSI report setting is a specific value (e.g., m=1), or a condition that they are combined.

The above situation may also be any one or more of the following:

the case where option 1 is utilized and x=0,

the case where option 1 is utilized and x=1,

the case where option 1 is utilized and x=2,

the case of option 2 being utilized.

For example, the above case may also be a case where option 1 is utilized and x=1, or a case where option 2 is utilized.

In case the above conditions/situation is met, the NZP-IMR may also be set for the STRP measurement hypothesis.

In embodiment 1.2, the maximum allowable number (or maximum number) of NZP-IMRs used for STRP measurement assumption may be a fixed value (e.g., 1), may be set to the UE by RRC signaling, or may be determined based on UE capability.

In embodiment 1.2, the maximum allowable number (or maximum number) of NZP-IMRs used for NCJT measurement assumption may be a fixed value (e.g., 1), may be set to the UE by RRC signaling, or may be determined based on UE capability.

In embodiment 1.2, the maximum allowable number (or maximum number) of NZP-IMRs for the STRP measurement hypothesis and the NCJT measurement hypothesis may be a fixed value (e.g., 1 or 2), may be set to the UE by RRC signaling, or may be determined based on the UE capability.

The maximum number may be the maximum number over all CMR groups or the maximum number per CMR group. For the latter, the maximum number of each CMR group may be the same or different.

In embodiment 1.2, whether or not to set/support interference measurement based on NZP CSI-RS used for STRP measurement hypothesis for different cases (the above case) may be set to UE by RRC signaling or may be determined based on UE capability. The RRC signaling may also be applied to control of only FR1, only FR2, or both FR1 and FR 2. The UE capability may be directed to only FR1, only FR2, or both FR1 and FR 2.

Fig. 6 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.2. This example corresponds to K _s Case=3, n=1, x=1. In this example, two CMRs (cmr#0, # 1) are set for trp#1, and one CMR (cmr#2) is set for trp#2.

Cmr#0 is used for STRP measurement hypothesis for trp#1, and corresponds to CSI-im#a and NZP-im#a. This example corresponds to the case where m=1.

CMR pairs (# 1, # 2) are used for NCJT measurement hypotheses and correspond to CSI-im#b and NZP-im#b.

In fig. 6, NZP-im#a is used for STRP measurement hypothesis and NZP-im#b is used for NCJT measurement hypothesis.

Fig. 7 is a diagram showing another example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.2. This example corresponds to K _s Case=4, n=1, x=1. In this example, two CMRs (cmr#0, # 1) are set for trp#1, and two CMRs (cmr#2, # 3) are set for trp#2.

CMR pairs (# 1, # 3) are used for NCJT measurement hypotheses and correspond to CSI-im#b and NZP-im#b.

In fig. 7, NZP-im#a is used for STRP measurement hypothesis and NZP-im#b is used for NCJT measurement hypothesis. CMR #2 is not used for any measurement hypothesis. This may also be the result of, for example, the maximum allowed number of NZP-IMRs for the STRP measurement hypothesis being 1, while NZP-IM is not associated with CMR # 2.

Embodiment 1.3

The control (assumption) of the above embodiment 1.3 can also be applied under certain conditions/situations. The condition may be a condition that Ks/K1/K2/X is a specific value, a condition that the number (e.g., M) of valid CMRs for STRP measurement hypothesis set in CSI report setting is a specific value (e.g., m=1), or a condition that they are combined.

The above situation may also be any one or more of the following:

the case where option 1 is utilized and x=0,

the case where option 1 is utilized and x=1,

the case where option 1 is utilized and x=2,

the case of option 2 being utilized.

In case the above conditions/situation is met, the NZP-IMR may also be shared for the STRP measurement hypothesis as well as the NCJT measurement hypothesis (and may also be used for any hypothesis). The shared NZP-IMR may also be referred to as a shared NZP-IMR (shared NZP-IMR).

Whether to share (or support to share) NZP-IMR for STRP measurement assumption and NCJT measurement assumption may be determined in advance by specifications (e.g., may be conditioned), may be set/notified to the UE by higher layer signaling/physical layer signaling, or may be determined based on UE capabilities.

In embodiment 1.3, the maximum allowable number (or maximum number) of shared NZP-IMRs for the STRP measurement hypothesis and the NCJT measurement hypothesis may be a fixed value (e.g., 1 or 2), may be set to the UE by RRC signaling, or may be determined based on the UE capability.

Fig. 8 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 1.3. This example corresponds to K _s Case=4, n=1, x=1. In this example, two CMRs (cmr#0, # 1) are set for trp#1, and two CMRs (cmr#2, # 3) are set for trp#2.

CMR pairs (# 1, # 3) are used for NCJT measurement hypotheses and correspond to CSI-im#b and NZP-im#a.

In fig. 8, NZP-im#a is also used for STRP measurement assumption and also for NCJT measurement assumption. CMR #2 is not used for any measurement hypothesis. This may also be the result of, for example, the maximum allowed number of shared NZP-IMRs for the STRP measurement hypothesis as well as the NCJT measurement hypothesis being 1, while NZP-IM is not associated with CMR # 2.

[ selection of embodiments 1.1 to 1.3 ]

In addition, in order to which case (the above case) any of embodiments 1.1 to 1.3 is applied, it may be set to the UE by RRC signaling or may be determined based on the UE capability. The RRC signaling (not limited to the RRC signaling, any of the RRC signaling of the present disclosure) may also be applied to control of only FR1, only FR2, or both FR1 and FR 2. The UE capability (not limited to the UE capability, and any UE capability of the present disclosure) may be directed to only FR1, only FR2, or both FR1 and FR 2. The same embodiment may be applied to FR1 and FR2, or different embodiments may be applied to them.

According to the first embodiment described above, when the NZP-IMR is set for NCJT, the interference measurement based on the NZP CSI-RS on the assumption of STRP measurement can be appropriately controlled.

< second embodiment >

The second embodiment relates to QCL assumption (QCL assumption) for CSI-IMR/NZP-IMR.

The QCL assumption for the NZP-IMR for the STRP measurement hypothesis may also be the same as existing rel.16. That is, the UE may assume that the NZP-CSI-RS resource (CMR) and the CSI-IMR or the NZP-IMR for channel measurement set for one CSI report are QCL (QCLed) with respect to QCL-D.

For NZP-IMR (NZP CSI-RS resource for interference measurement for CMR pair) used for NCJT measurement assumption, UE may also assume that the set of NZP-CSI-RS resource (CMR) for channel measurement and CSI-IMR or NZP-IMR for each TRP (per CMR group) for one CSI report is QCL (QCLed).

In other words, the UE can also assume that, in the case where measurement of CSI of each TRP is performed according to CMR of the CMR pair used for the NCJT measurement hypothesis, the CSI-IM/NZP-IMR used for the NCJT measurement hypothesis has a relationship of two QCL types D for each TRP. Such a concept can be utilized also for CSI-IM/NZP-IMR of embodiment 1.1 and 1.2, CSI-IM of embodiment 1.3, and the like, for example.

Fig. 9 is a diagram showing an example of QCL estimation of CSI-IM/NZP-IM in the second embodiment. Since the example is the same as that of fig. 7, a repetitive description will not be made.

The UE may also assume that the CSI-IM#a and NZP-IM#A used for STRP measurement hypotheses and the corresponding CMR#0 are QCL-D (QCL-Ded with CMR#0).

The UE may also assume that CSI-IM#b and NZP-IM#B for NCJT measurement hypotheses are QCL-D with CMR#1 for CSI of TRP#1 and QCL-D with CMR#3 for CSI of TRP#2.

For the shared NZP-IMR for the STRP measurement hypothesis and the NCJT measurement hypothesis described in embodiment 1.3, the UE may also be conceived to have the above-described relationship of two QCL types D for each TRP, if at least one of the following conditions (1) - (3) is satisfied:

(1) The CMR for the above STRP measurement hypothesis is set to be the same as one of the CMR of the indicated CMR pair for the above NCJT measurement hypothesis,

(2) Is set from the indicated CMR pair for the NCJT measurement hypothesis described above, one CMR is used for the STRP measurement hypothesis (this condition may also be based on UE capability, used for FR1 only, FR2 only, or both FR1 and FR2 only),

(3) One of the CMR for the above STRP measurement hypothesis and the CMR of the indicated CMR pair for the above NCJT measurement hypothesis is QCL-D.

The condition determination may be set to the UE by RRC signaling or may be determined based on the UE capability. The RRC signaling may also be applied to control of only FR1, only FR2, or both FR1 and FR 2. The UE capability may be directed to only FR1, only FR2, or both FR1 and FR 2. The same conditions may be used for FR1 and FR2, or different conditions may be used.

Fig. 10 is a diagram showing an example of QCL estimation of CSI-IM/NZP-IM in the second embodiment. Since the example is the same as that of fig. 8, a repetitive description will not be made. In this example, it is assumed that CMR#0 and CMR#1 are QCL-D. In this example, one (CMR#1) of the CMR (CMR#0) for the STRP measurement hypothesis and the CMR of the indicated CMR pair for the NCJT measurement hypothesis is QCL-D, thus satisfying the condition (3) above.

Thus, the UE can also assume that the shared NZP-IMR (NZP-im#a) is QCL-D with the corresponding cmr#0/#1 in case that the shared NZP-IMR is used in the measurement for the STRP measurement hypothesis and the measurement for the trp#1 for the NCJT measurement hypothesis.

The UE may also envisage that in case of using a shared NZP-IMR (NZP-im#a) in the measurement of trp#2 for the NCJT measurement hypothesis, the shared NZP-IMR and the corresponding cmr#3 are QCL-D.

Embodiment 1.3 and modification of the second embodiment

In embodiments 1.3 and the second embodiment, the shared NZP-IMR that is shared for the STRP measurement hypothesis and the NCJT measurement hypothesis is described, but the NZP-IMR may be replaced with at least one of the CMR and the CSI-IM. That is, the configuration of shared CMR, shared CSI-IM, and the like, QCL assumption, and the like, which are controlled to be shared for the STRP measurement hypothesis and the NCJT measurement hypothesis, may be performed based on embodiments 1.3 and the second embodiment.

For example, whether or not the CMR/CSI-IM/NZP-IMR is shared (whether or not sharing is activated), the maximum allowed number of shared CMR/shared CSI-IM/shared NZP-IMR, and the like may be set for the STRP measurement hypothesis and the NCJT measurement hypothesis by higher layer signaling.

In addition, UE capabilities of the shared CMR/shared CSI-IM/shared NZP-IMR may be common (whether supported or not may be indicated by one capability) or separate (separate) capabilities (whether supported or not may be indicated by different capabilities, respectively).

The shared CMR/shared CSI-IM/shared NZP-IMR may be set only when at least one of the conditions (1) to (3) described in the second embodiment is satisfied. In this case, the shared CMR/shared CSI-IM/shared NZP-IMR is set in a case where two QCL types D for measurement of each TRP can be appropriately determined for the shared CMR/shared CSI-IM/shared NZP-IMR, and therefore, appropriate measurement can be achieved.

In addition, "shared" for CMR/CSI-IM/NZP-IMR may also mean that CMR/CSI-IM/NZP-IMR is set/specified for both STRP measurement assumptions and NCJT measurement assumptions.

According to the second embodiment described above, the UE can appropriately determine QCL assumption for CSI-IMR/NZP-IMR.

< third embodiment >

The third embodiment corresponds to a case where the NZP-IMR is not set for NCJT. The third embodiment may also be applied to a case where, for one CSI report setting (options 1 and 2) for the STRP measurement hypothesis and the NCJT measurement hypothesis, interference measurement for NZP CSI-RS based on the CMR pair for the NCJT measurement hypothesis is not set to the UE.

The third embodiment focuses on interference measurement based on NZP CSI-RS used for STRP measurement hypothesis, and is roughly classified into embodiments 3.1 to 3.2. In embodiments 3.1 to 3.2, the following controls (envisaged) are applied, respectively:

embodiment 3.1: interference measurements based on NZP CSI-RS set for STRP measurement hypotheses are not allowed (cannot be implemented) all the time or under certain conditions.

Embodiment 3.2: interference measurements based on NZP CSI-RS set for STRP measurement hypotheses are set (the interference measurements can be implemented) under certain conditions.

Embodiment 3.1

The control (assumption) of the above-described embodiment 3.1 may be applied either under certain conditions/circumstances or unconditionally or in all circumstances (or all the time). The condition may be such that Ks/K1/K2/X/M is a specific value (e.g., m=1). In addition, if the condition/situation is not equivalent, the UE may also assume that interference measurement based on NZP CSI-RS set for the STRP measurement hypothesis (for example, NZP-IMR set for the STRP measurement hypothesis) is set.

For example, if M is larger than M' for a certain CSI report setting, the NZP-IMR used for the STRP measurement hypothesis may not be allowed to be set in the CSI report setting.

The above situation may also be any one or more of the following:

the case where option 1 is utilized and x=0,

the case where option 1 is utilized and x=1,

the case where option 1 is utilized and x=2,

the case of option 2 being utilized.

For example, interference measurements based on NZP CSI-RS set for STRP measurement assumptions may also not be allowed in the following cases:

a case where option 1 is utilized and x=1, and a case where m=1 number of valid CMRs for STRP measurement hypothesis is set/specified,

a case where option 1 is utilized and x=1 or 2, and a case where m=1 or 2 numbers of valid CMRs for STRP measurement hypotheses are set/specified,

a case where option 2 is utilized, and a case where m=1 or 2 numbers of valid CMRs for STRP measurement hypotheses are set/specified,

regarding which case (the above case/condition) the interference measurement based on the NZP CSI-RS (NZP-IMR) used for the STRP measurement hypothesis is applied for, it may be set to the UE through RRC signaling or may be decided based on the UE capability. The RRC signaling (not limited to the RRC signaling, any of the RRC signaling of the present disclosure) may also be applied to control of only FR1, only FR2, or both FR1 and FR 2. The UE capability (not limited to the UE capability, and any UE capability of the present disclosure) may be directed to only FR1, only FR2, or both FR1 and FR 2.

Fig. 11 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 3.1. Since the example is the same as that of fig. 5, a repetitive description will not be made. Fig. 11 differs from fig. 5 in that NZP-IMR is not set. In this example, the assumption is applied that no NZP-IMR is allowed for CSI report setting where M is 2 or more.

Embodiment 3.2

The control (assumption) of the above embodiment 3.2 can also be applied in certain conditions/situations. The condition may be such that Ks/K1/K2/X/M is a specific value (e.g., m=1). In addition, if the condition/situation is not satisfied, the UE may assume that the setting of interference measurement based on the NZP CSI-RS set for the STRP measurement hypothesis is not allowed (e.g., the NZP-IMR not set for the STRP measurement hypothesis).

The above situation may also be any one or more of the following:

the case where option 1 is utilized and x=0,

the case where option 1 is utilized and x=1,

the case where option 1 is utilized and x=2,

the case of option 2 being utilized.

In embodiment 3.2, whether or not to set/support interference measurement based on NZP CSI-RS used for STRP measurement hypothesis for different situations (the above situation/condition) may be set to UE by RRC signaling or may be determined based on UE capability. The RRC signaling may also be applied to control of only FR1, only FR2, or both FR1 and FR 2. The UE capability may be directed to only FR1, only FR2, or both FR1 and FR 2.

In embodiment 3.2, the maximum allowable number (or maximum number) of NZP-IMRs used for STRP measurement assumption may be a fixed value (e.g., 1), may be set to the UE by RRC signaling, or may be determined based on UE capability.

Fig. 12 is a diagram showing an example of the relationship among CMR, CSI-IM, and NZP-IM in embodiment 3.2. Since the example is the same as that of fig. 7, a repetitive description will not be made. Fig. 12 is different from fig. 7 in that NZP-imr#b is not set. The assumption that the maximum allowable number of NZP-IMR used for STRP measurement hypothesis is 1 is applied in this example.

According to the third embodiment described above, when the NZP-IMR is not set for NCJT, the interference measurement based on the NZP CSI-RS, which is assumed for STRP measurement, can be appropriately controlled.

< fourth embodiment >, a third embodiment

The fourth embodiment relates to discrimination of settings of NZP-IM.

Fig. 13A to 13C are diagrams showing an example of a change in setting of NZP-IM. Fig. 13A is the same example as fig. 12, and therefore, a description thereof will not be repeated. Fig. 13A is an example where NZP-IM is set for the STRP measurement hypothesis.

Fig. 13B is the same example as fig. 13A, and thus a repetitive description will not be made. Fig. 13B differs from fig. 13A in that NZP-imr#a is associated with a CMR pair for the NCJT measurement hypothesis. Fig. 13B is an example where NZP-IM is set for the NCJT measurement hypothesis.

Fig. 13C is the same example as fig. 8, and therefore, a repetitive description will not be made. Fig. 13B is an example in which a shared NZP-IM is set for the STRP measurement hypothesis and the NCJT measurement hypothesis.

As is apparent from the observation, the CSI report settings of fig. 13A to 13C cannot be easily distinguished because the values of the indexes to be used and the number of resources are the same.

Therefore, an RRC parameter indicating that each NZP-IM is for STRP measurement hypothesis or NCJT measurement hypothesis may be introduced. For example, an RRC parameter indicating whether the CSI resource setting (or the corresponding NZP CSI-RS) is for STRP measurement hypothesis or NCJT measurement hypothesis may be included in a CSI resource setting (RRC information element "CSI-resource control") corresponding to the NZP-IMR. Fig. 13A and 13B can be distinguished from each other based on this parameter.

In addition, the parameter may also indicate "yes/no STRP measurement hypothesis" or "yes/no NCJT measurement hypothesis". If the parameter is not included, the CSI resource setting (or the corresponding NZP CSI-RS) may be used for STRP measurement assumption, NCJT measurement assumption, or may not be used for any one or may be used for any one.

Further, RRC parameters indicating that each NZP-IM is for STRP measurement hypothesis, NCJT measurement hypothesis, or both may be shared may be introduced. For example, an RRC parameter indicating whether the CSI resource setting (or the corresponding NZP CSI-RS) is for STRP measurement hypothesis or for NCJT measurement hypothesis or shared may be included in a CSI resource setting (RRC information element "CSI-resource control") corresponding to the NZP-IMR. Fig. 13A to 13C can be distinguished from this parameter.

In addition, the parameter may also indicate "yes/no for STRP measurement hypothesis" or "yes/no for NCJT measurement hypothesis" or "shared/not shared for STRP measurement hypothesis. If the parameter is not included, the CSI resource setting (or the corresponding NZP CSI-RS) may be used for STRP measurement assumption, NCJT measurement assumption, unavailable to any party, or available (or sharable) to any party.

According to the fourth embodiment described above, the measurement hypothesis for the NZP-IMR can be appropriately set.

UE capability

The UE may also send (report) to the base station as UE capabilities (UE capability information) at least one of:

whether NZP CSI-RS based interference measurements for STRP measurements only are supported,

whether or not NZP CSI-RS based interference measurements for NCJT MTRP measurements only are supported,

whether NZP CSI-RS based interference measurements for both STRP measurements and NCJT MTRP measurements are supported,

the supported Ks/K1/K2/X limit (e.g., maximum value),

the number of valid CMRs/maximum number supported for STRP measurement hypotheses,

the number of valid CMRs supported for NCJT measurement hypotheses/maximum number,

The set CSI-IM/number of shared CSI-IM/maximum number for STRP/NCJT measurement assumption.

In addition, the embodiments of the present disclosure may be applied on the condition that the UE reports UE capabilities corresponding to the at least one to the network, or on the condition that the UE is set/activated/instructed for the at least one UE capability through higher layer signaling. Embodiments of the present disclosure may also be applied in case that a specific higher layer parameter is set/activated/indicated for the UE.

The UE capability described above may be directed to only FR1, only FR2, or both FR1 and FR 2.

In addition, regarding several of the cases, options, etc. described in the present disclosure, the UE capabilities described above may be either common (whether supported or not may be indicated by one capability) or separate (separate) (whether supported or not may be indicated by different capabilities, respectively).

(Wireless communication System)

The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the embodiments of the present disclosure or a combination thereof.

Fig. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication by using long term evolution (Long Term Evolution (LTE)) standardized by the third generation partnership project (Third Generation Partnership Project (3 GPP)), the fifth generation mobile communication system new wireless (5 th generation mobile communication system New Radio (5G NR)), or the like.

The wireless communication system 1 may support dual connection (Multi-RAT dual connection (Multi-RAT Dual Connectivity (MR-DC))) between a plurality of radio access technologies (Radio Access Technology (RATs)). MR-DC may also include a dual connection of LTE (evolved universal terrestrial radio Access (Evolved Universal Terrestrial Radio Access (E-UTRA))) with NR (E-UTRA-NR dual connection (E-UTRA-NR Dual Connectivity (EN-DC))), NR with LTE (NR-E-UTRA dual connection (NR-E-UTRA Dual Connectivity (NE-DC))), etc.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station (gNB) of NR is MN and the base station (eNB) of LTE (E-UTRA) is SN.

The wireless communication system 1 may also support dual connections between multiple base stations within the same RAT (e.g., dual connection (NR-NR dual connection (NR-NR Dual Connectivity (NN-DC))) of a base station (gNB) where both MN and SN are NRs).

The radio communication system 1 may include a base station 11 forming a macro cell C1 having a relatively wide coverage area, and base stations 12 (12 a to 12C) arranged in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to those shown in the figure. Hereinafter, the base stations 11 and 12 are collectively referred to as a base station 10 without distinction.

The user terminal 20 may also be connected to at least one of the plurality of base stations 10. The user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) using a plurality of component carriers (Component Carrier (CC)) and Dual Connection (DC).

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

The user terminal 20 may perform communication using at least one of time division duplex (Time Division Duplex (TDD)) and frequency division duplex (Frequency Division Duplex (FDD)) in each CC.

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based on a common public radio interface (Common Public Radio Interface (CPRI)), X2 interface, etc.) or wireless (e.g., NR communication). For example, when NR communication is utilized as a backhaul between the base stations 11 and 12, the base station 11 corresponding to a higher-level station may be referred to as an integrated access backhaul (Integrated Access Backhaul (IAB)) donor (donor), and the base station 12 corresponding to a relay station (relay) may be referred to as an IAB node.

The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The Core Network 30 may include at least one of an evolved packet Core (Evolved Packet Core (EPC)), a 5G Core Network (5 GCN), a next generation Core (Next Generation Core (NGC)), and the like, for example.

The user terminal 20 may be a terminal supporting at least one of communication schemes such as LTE, LTE-a, and 5G.

In the wireless communication system 1, a wireless access scheme based on orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) may be used. For example, cyclic prefix OFDM (Cyclic Prefix OFDM (CP-OFDM)), discrete fourier transform spread OFDM (Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access (OFDMA)), single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)), and the like may be used in at least one of Downlink (DL)) and Uplink (UL).

The radio access scheme may also be referred to as waveform (waveform). In the radio communication system 1, other radio access schemes (for example, other single carrier transmission schemes and other multi-carrier transmission schemes) may be used for the UL and DL radio access schemes.

As the downlink channel, a downlink shared channel (physical downlink shared channel (Physical Downlink Shared Channel (PDSCH))), a broadcast channel (physical broadcast channel (Physical Broadcast Channel (PBCH)))), a downlink control channel (physical downlink control channel (Physical Downlink Control Channel (PDCCH))), and the like shared by the user terminals 20 may be used in the wireless communication system 1.

As the uplink channel, an uplink shared channel (physical uplink shared channel (Physical Uplink Shared Channel (PUSCH))), an uplink control channel (physical uplink control channel (Physical Uplink Control Channel (PUCCH))), a random access channel (physical random access channel (Physical Random Access Channel (PRACH))), or the like shared by the user terminals 20 may be used in the wireless communication system 1.

User data, higher layer control information, system information blocks (System Information Block (SIBs)), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted through the PUSCH. In addition, a master information block (Master Information Block (MIB)) may also be transmitted through the PBCH.

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

The DCI scheduling PDSCH may be referred to as DL allocation, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. The PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data.

In the detection of PDCCH, a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may also be utilized. CORESET corresponds to searching for the resources of DCI. The search space corresponds to a search region of PDCCH candidates (PDCCH candidates) and a search method. A CORESET may also be associated with one or more search spaces. The UE may also monitor CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels (aggregation Level). One or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may also be replaced with each other.

Uplink control information (Uplink Control Information (UCI)) including at least one of channel state information (Channel State Information (CSI)), transmission acknowledgement information (e.g., also referred to as hybrid automatic repeat request acknowledgement (Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, etc.), and scheduling request (Scheduling Request (SR)) may also be transmitted through the PUCCH. The random access preamble used to establish a connection with a cell may also be transmitted via the PRACH.

In addition, in the present disclosure, downlink, uplink, etc. may be expressed without "link". The present invention may be expressed without "Physical" at the beginning of each channel.

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

The synchronization signal may be at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)), for example. The signal blocks including SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB)), or the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

In the wireless communication system 1, as an uplink reference signal (Uplink Reference Signal (UL-RS)), a reference signal for measurement (sounding reference signal (Sounding Reference Signal (SRS))), a reference signal for Demodulation (DMRS), and the like may be transmitted. In addition, the DMRS may also be referred to as a user terminal specific reference signal (UE-specific Reference Signal).

(base station)

Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission path interface (transmission line interface (transmission line interface)) 140. The control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided with one or more components.

In this example, the functional blocks of the characteristic part in the present embodiment are mainly shown, and it is also conceivable that the base station 10 has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 performs control of the entire base station 10. The control unit 110 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field of the present disclosure.

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission/reception, measurement, and the like using the transmission/reception unit 120, the transmission/reception antenna 130, and the transmission path interface 140. The control unit 110 may generate data, control information, a sequence (sequence), and the like transmitted as signals, and forward the generated data to the transmitting/receiving unit 120. The control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.

The transmitting/receiving unit 120 may include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmitting/receiving unit 120 may be configured of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmitting/receiving unit 120 may be configured as an integral transmitting/receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmission unit may be composed of the transmission processing unit 1211 and the RF unit 122. The receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.

The transmitting/receiving antenna 130 may be constituted by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna or the like.

The transmitting/receiving unit 120 may transmit the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmitting/receiving unit 120 may receive the uplink channel, the uplink reference signal, and the like.

The transmitting-receiving unit 120 may also form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

The transmission/reception section 120 (transmission processing section 1211) may perform processing of a packet data convergence protocol (Packet Data Convergence Protocol (PDCP)) layer, processing of a radio link control (Radio Link Control (RLC)) layer (for example, RLC retransmission control), processing of a medium access control (Medium Access Control (MAC)) layer (for example, HARQ retransmission control), and the like with respect to data, control information, and the like acquired from the control section 110, for example, to generate a bit sequence to be transmitted.

The transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (error correction coding may be included), modulation, mapping, filter processing (filtering processing), discrete fourier transform (Discrete Fourier Transform (DFT)) processing (if necessary), inverse fast fourier transform (Inverse Fast Fourier Transform (IFFT)) processing, precoding, and digital-analog conversion on a bit string to be transmitted, and output a baseband signal.

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

On the other hand, the transmitting/receiving unit 120 (RF unit 122) may amplify, filter-process, demodulate a signal in a radio frequency band received through the transmitting/receiving antenna 130, and the like.

The transmitting/receiving section 120 (reception processing section 1212) may apply an analog-to-digital conversion, a fast fourier transform (Fast Fourier Transform (FFT)) process, an inverse discrete fourier transform (Inverse Discrete Fourier Transform (IDFT)) process (if necessary), a filter process, demapping, demodulation, decoding (error correction decoding may be included), a MAC layer process, an RLC layer process, a PDCP layer process, and other reception processes to the acquired baseband signal, and acquire user data.

The transmitting-receiving unit 120 (measuring unit 123) may also perform measurements related to the received signals. For example, measurement section 123 may perform radio resource management (Radio Resource Management (RRM)) measurement, channel state information (Channel State Information (CSI)) measurement, and the like based on the received signal. Measurement section 123 may also measure received power (for example, reference signal received power (Reference Signal Received Power (RSRP))), received quality (for example, reference signal received quality (Reference Signal Received Quality (RSRQ)), signal-to-interference-plus-noise ratio (Signal to Interference plus Noise Ratio (SINR)), signal-to-noise ratio (Signal to Noise Ratio (SNR))), signal strength (for example, received signal strength indicator (Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), and the like. The measurement results may also be output to the control unit 110.

The transmission path interface 140 may transmit and receive signals (backhaul signaling) to and from devices, other base stations 10, and the like included in the core network 30, or may acquire and transmit user data (user plane data), control plane data, and the like for the user terminal 20.

In addition, the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

The transmitting/receiving unit 120 may transmit setting information for the first channel measurement resources related to the first channel measurement resource group and the second channel measurement resources related to the second channel measurement resource group to the user terminal 20.

The setting information may be "CSI-ReportConfig" of the RRC IE (or the IE included in the IE), or may be another RRC IE.

Further, the control unit 110 may assume that the user terminal 20 performs control based on a certain assumption for interference measurement of a non-zero power channel state information reference signal (Non Zero Power Channel State Information Reference Signal (NZP CSI-RS)) based on a hypothesis for single Transmission Reception Point (TRP) measurement.

(user terminal)

Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmitting/receiving unit 220, and a transmitting/receiving antenna 230. The control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided with one or more types.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, and it is also conceivable that the user terminal 20 further has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 performs control of the entire user terminal 20. The control unit 210 can be configured by a controller, a control circuit, or the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation of signals, mapping, etc. The control unit 210 may control transmission/reception, measurement, and the like using the transmission/reception unit 220 and the transmission/reception antenna 230. The control unit 210 may generate data, control information, a sequence, and the like transmitted as signals, and forward the generated data to the transmitting/receiving unit 220.

The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transmitting/receiving unit 220 may be configured of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmitting/receiving unit 220 may be configured as an integral transmitting/receiving unit, or may be configured by a transmitting unit and a receiving unit. The transmission means may be constituted by the transmission processing means 2211 and the RF means 222. The receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmitting/receiving antenna 230 may be constituted by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna or the like.

The transceiver unit 220 may also receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transceiver unit 220 may transmit the uplink channel, the uplink reference signal, and the like.

The transmitting-receiving unit 220 may also form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

The transmission/reception section 220 (transmission processing section 2211) may perform, for example, PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control) and the like with respect to the data, control information and the like acquired from the control section 210, and generate a bit sequence to be transmitted.

The transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (error correction coding may be included), modulation, mapping, filter processing, DFT processing (as needed), IFFT processing, precoding, digital-to-analog conversion, and the like for a bit string to be transmitted, and output a baseband signal.

Further, whether to apply DFT processing may be based on the setting of transform precoding. For a certain channel (e.g., PUSCH), when transform precoding is valid (enabled), the transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing for transmitting the channel using a DFT-s-OFDM waveform, and if not, the transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmitting/receiving unit 220 (RF unit 222) may perform modulation, filter processing, amplification, etc. for the baseband signal in the radio frequency band, and transmit the signal in the radio frequency band via the transmitting/receiving antenna 230.

On the other hand, the transmitting/receiving unit 220 (RF unit 222) may amplify, filter-process, demodulate a baseband signal, and the like, with respect to a signal in a radio frequency band received through the transmitting/receiving antenna 230.

The transmitting/receiving section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (error correction decoding may be included), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signals. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. The measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may also be output to the control unit 210.

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

The transmitting/receiving unit 220 may receive setting information for the first channel measurement resources related to the first channel measurement resource group (first CMR group) and the second channel measurement resources related to the second channel measurement resource group (second CMR group). The setting information may be "CSI-ReportConfig" of the RRC IE (or the IE included in the IE), or may be another RRC IE.

The control unit 210 may also control based on a certain assumption for interference measurement based on a non-zero power channel state information reference signal (Non Zero Power Channel State Information Reference Signal (NZP CSI-RS)) for single Transmission Reception Point (TRP) measurement assumption.

Control unit 210 may also contemplate that interference measurements based on the above-described NZP CSI-RS for the above-described STRP measurement hypotheses are not supported.

Control unit 210 may also be configured to perform interference measurement based on the NZP CSI-RS used for the STRP measurement hypothesis, in addition to interference measurement based on the NZP CSI-RS used for Non-coherent joint transmission (n-Coherent Joint Transmission (NCJT)) measurement hypothesis.

The control unit 210 may also assume that interference measurements based on the above-mentioned NZP CSI-RS for the above-mentioned STRP measurement hypothesis are activated by being informed of higher layer parameters designated for a shared NZP CSI-RS (which may also be referred to as shared CSI-RS (shared CSI-RS), shared NZP-IM (shared NZP-IM), etc.) for a Non-coherent joint transmission (NCJT)) measurement hypothesis.

(hardware construction)

The block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by one device physically or logically combined, or two or more devices physically or logically separated may be directly or indirectly connected (for example, by a wire, a wireless, or the like) and realized by these plural devices. The functional blocks may also be implemented by combining the above-described device or devices with software.

Here, the functions include, but are not limited to, judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communication), forwarding (forwarding), configuration (configuration), reconfiguration (reconfiguration), allocation (mapping), assignment (allocation), and the like. For example, a functional block (structural unit) that realizes the transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. As described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, and the like in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 17 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In addition, in the present disclosure, terms of devices, circuits, apparatuses, parts (sections), units, and the like can be replaced with each other. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to not include a part of the devices.

For example, the processor 1001 is shown as only one, but there may be multiple processors. Further, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or by other means. The processor 1001 may be realized by one or more chips.

Each function in the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, performing an operation by the processor 1001, controlling communication via the communication device 1004, or controlling at least one of reading and writing of data in the memory 1002 and the memory 1003.

The processor 1001, for example, causes an operating system to operate to control the entire computer. The processor 1001 may be configured by a central processing unit (Central Processing Unit (CPU)) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110 (210), the transmitting/receiving unit 120 (220), and the like described above may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment can be used. For example, the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same may be implemented for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be constituted by at least one of a Read Only Memory (ROM), an erasable programmable Read Only Memory (Erasable Programmable ROM (EPROM)), an electrically erasable programmable Read Only Memory (Electrically EPROM (EEPROM)), a random access Memory (Random Access Memory (RAM)), and other suitable storage media, for example. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The memory 1002 can store programs (program codes), software modules, and the like executable to implement a wireless communication method according to an embodiment of the present disclosure.

The storage 1003 may also be a computer-readable recording medium, for example, constituted by at least one of a flexible disk (flexible Disc), a soft (registered trademark) disk, an magneto-optical disk (for example, a Compact Disc read only memory (CD-ROM), etc.), a digital versatile Disc, a Blu-ray (registered trademark) disk, a removable magnetic disk (removables), a hard disk drive, a smart card, a flash memory device (for example, a card, a stick, a key drive), a magnetic stripe (strip), a database, a server, and other suitable storage medium. The storage 1003 may also be referred to as secondary storage.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like, for example. In order to realize at least one of frequency division duplexing (Frequency Division Duplex (FDD)) and time division duplexing (Time Division Duplex (TDD)), the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be implemented by the communication device 1004. The transmitting/receiving unit 120 (220) may be implemented by physically or logically separating the transmitting unit 120a (220 a) and the receiving unit 120b (220 b).

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, a light emitting diode (Light Emitting Diode (LED)) lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

The processor 1001, the memory 1002, and other devices are connected by a bus 1007 for communicating information. The bus 1007 may be formed using a single bus or may be formed using different buses between devices.

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an application specific integrated circuit (Application Specific Integrated Circuit (ASIC)), a programmable logic device (Programmable Logic Device (PLD)), and a field programmable gate array (Field Programmable Gate Array (FPGA)), or may be configured to implement a part or all of the functional blocks by using the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

(modification)

In addition, with respect to terms described in the present disclosure and terms required for understanding the present disclosure, terms having the same or similar meanings may be substituted. For example, channels, symbols, and signals (signals or signaling) may also be interchanged. In addition, the signal may also be a message. The Reference Signal (RS) can also be simply referred to as RS, and may also be referred to as Pilot (Pilot), pilot Signal, or the like, depending on the standard applied. In addition, the component carrier (Component Carrier (CC)) may also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may also consist of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be formed of one or more slots in the time domain. The subframes may also be a fixed length of time (e.g., 1 ms) independent of the parameter set (numerology).

Here, the parameter set may also be a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may also represent at least one of a subcarrier spacing (SubCarrier Spacing (SCS)), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (Transmission Time Interval (TTI)), a number of symbols per TTI, a radio frame structure, a specific filter process performed by a transceiver in a frequency domain, a specific windowing (windowing) process performed by a transceiver in a time domain, and the like.

A slot may also be formed in the time domain from one or more symbols, orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access (SC-FDMA)) symbols, and so on. Furthermore, the time slots may also be time units based on parameter sets.

The time slot may also contain a plurality of mini-slots. Each mini-slot may also be formed of one or more symbols in the time domain. In addition, the mini-slot may also be referred to as a sub-slot. Mini-slots may also be made up of a fewer number of symbols than slots. PDSCH (or PUSCH) transmitted in a larger time unit than the mini-slot may also be referred to as PDSCH (PUSCH) mapping type a. PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol each represent a unit of time when a signal is transmitted. The radio frames, subframes, slots, mini-slots, and symbols may also use other designations that each corresponds to. In addition, the frame, subframe, slot, mini-slot, symbol, and the like units in the present disclosure may also be replaced with each other.

For example, one subframe may also be referred to as a TTI, a plurality of consecutive subframes may also be referred to as a TTI, and one slot or one mini-slot may also be referred to as a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the conventional LTE, may be a period (for example, 1 to 13 symbols) shorter than 1ms, or may be a period longer than 1 ms. The unit indicating the TTI may be referred to as a slot, a mini-slot, or the like, instead of a subframe.

Here, TTI refers to, for example, a scheduled minimum time unit in wireless communication. For example, in the LTE system, a base station performs scheduling for each user terminal to allocate radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a data packet (transport block), a code block, a codeword, or the like subjected to channel coding, or may be a processing unit such as scheduling or link adaptation. In addition, when a TTI is given, a time interval (e.g., the number of symbols) in which a transport block, a code block, a codeword, etc. are actually mapped may be shorter than the TTI.

In addition, in the case where one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may also be the minimum time unit of scheduling. In addition, the number of slots (mini-slots) constituting the minimum time unit of the schedule can also be controlled.

A TTI having a time length of 1ms may also be referred to as a normal TTI (TTI in 3gpp rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, etc. A TTI that is shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may be replaced with a TTI having a TTI length less than the long TTI and a TTI length of 1ms or more.

A Resource Block (RB) is a Resource allocation unit of a time domain and a frequency domain, and may include one or a plurality of consecutive subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in the RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

Further, the RB may also contain one or more symbols in the time domain, and may be one slot, one mini-slot, one subframe, or one TTI in length. One TTI, one subframe, etc. may also be respectively composed of one or more resource blocks.

In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), subcarrier groups (SCGs), resource element groups (Resource Element Group (REGs)), PRB pairs, RB peering.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may be a subcarrier and a radio resource area of one symbol.

A Bandwidth Part (BWP) (which may also be referred to as a partial Bandwidth, etc.) may also represent a subset of consecutive common RBs (common resource blocks (common resource blocks)) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of the RB with reference to the common reference point of the carrier. PRBs may be defined in a BWP and numbered in the BWP.

The BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). For a UE, one or more BWP may also be set in one carrier.

At least one of the set BWP may be active, and the UE may not contemplate transmission and reception of a specific signal/channel other than the active BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced with "BWP".

The above-described configurations of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed in absolute values, relative values to a specific value, or other corresponding information. For example, radio resources may also be indicated by a particular index.

In the present disclosure, the names used for parameters and the like are not restrictive names in all aspects. Further, the mathematical expression or the like using these parameters may also be different from that explicitly disclosed in the present disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting names in all respects.

Information, signals, etc. described in this disclosure may also be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips (chips), and the like may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

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

The input/output information, signals, and the like may be stored in a specific location (for example, a memory), or may be managed by a management table. The input and output information, signals, etc. may be overwritten, updated, or added. The outputted information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The notification of information is not limited to the embodiment described in the present disclosure, but may be performed by other methods. For example, notification of information in the present disclosure may also be implemented by physical layer signaling (e.g., downlink control information (Downlink Control Information (DCI))), uplink control information (Uplink Control Information (UCI)))), higher layer signaling (e.g., radio resource control (Radio Resource Control (RRC)) signaling, broadcast information (master information block (Master Information Block (MIB)), system information block (System Information Block (SIB)) or the like), medium access control (Medium Access Control (MAC)) signaling), other signals, or a combination thereof.

The physical Layer signaling may be referred to as Layer 1/Layer 2 (L1/L2)) control information (L1/L2 control signal), L1 control information (L1 control signal), or the like. The RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration)) message, or the like. The MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).

Note that the notification of specific information (for example, notification of "X") is not limited to explicit notification, and may be performed implicitly (for example, by notification of no specific information or notification of other information).

The determination may be performed by a value (0 or 1) represented by one bit, a true or false value (boolean) represented by true or false, or a comparison of values (e.g., with a specific value).

Software, whether referred to as software (firmware), middleware (middleware-software), microcode (micro-code), hardware description language, or by other names, should be construed broadly to mean instructions, instruction sets, codes (codes), code segments (code fragments), program codes (program codes), programs (programs), subroutines (sub-programs), software modules (software modules), applications (applications), software applications (software application), software packages (software packages), routines (routines), subroutines (sub-routines), objects (objects), executable files, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, in the case of transmitting software from a website, server, or other remote source (remote source) using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (Digital Subscriber Line (DSL)), etc.) and wireless technology (infrared, microwave, etc.), the at least one of wired technology and wireless technology is included in the definition of transmission medium.

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

In the present disclosure, terms such as "precoding", "precoder", "weight", "Quasi Co-Location", "transmission setting instruction state (Transmission Configuration Indication state (TCI state))", "spatial relationship", "spatial domain filter (spatial domain filter)", "transmission power", "phase rotation", "antenna port group", "layer number", "rank", "resource set", "resource group", "beam width", "beam angle", "antenna element", "panel", and the like can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS))", "radio Base Station", "fixed Station", "NodeB", "eNB (eNodeB)", "gNB (gndeb)", "access Point", "Transmission Point (Transmission Point (TP))", "Reception Point (RP))", "Transmission Reception Point (Transmission/Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", and the like can be used interchangeably. There are also cases where the base station is referred to by terms of a macrocell, a small cell, a femtocell, a picocell, and the like.

The base station can accommodate one or more (e.g., three) cells. In the case of a base station accommodating a plurality of cells, the coverage area of the base station can be divided into a plurality of smaller areas, each of which can also provide communication services through a base station subsystem, such as a small base station for indoor use (remote radio head (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of the base station and the base station subsystem that is in communication service within that coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal", "User Equipment (UE)", "terminal", and the like can be used interchangeably.

There are also situations where a mobile station is referred to by a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, hand-held communicator (hand set), user agent, mobile client, or a number of other suitable terms.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, or the like. The mobile body may be a vehicle (e.g., a vehicle, an airplane, etc.), a mobile body that moves unmanned (e.g., an unmanned aerial vehicle (clone), an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may be an internet of things (Internet of Things (IoT)) device such as a sensor.

In addition, the base station in the present disclosure may be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (for example, may also be referred to as Device-to-Device (D2D)), vehicle-to-evaluation (V2X), or the like. In this case, the user terminal 20 may have the functions of the base station 10 described above. In addition, terms of "uplink", "downlink", and the like may also be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channels, downlink channels, etc. may be replaced with side link channels.

Likewise, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, an operation performed by a base station is sometimes performed by an upper node (upper node) thereof, as the case may be. Obviously, in a network comprising one or more network nodes (network nodes) with base stations, various operations performed for communication with a terminal may be performed by a base station, one or more network nodes other than a base station (e.g. considering a mobility management entity (Mobility Management Entity (MME)), a Serving-Gateway (S-GW)), etc., but not limited thereto, or a combination thereof.

The embodiments described in the present disclosure may be used alone, in combination, or switched depending on the execution. The processing procedures, sequences, flowcharts, and the like of the embodiments and embodiments described in this disclosure may be changed in order as long as they are not contradictory. For example, for the methods described in this disclosure, elements of the various steps are presented using the illustrated order, but are not limited to the particular order presented.

The various modes/embodiments described in the present disclosure can also be applied to long term evolution (Long Term Evolution (LTE)), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), upper 3G, IMT-Advanced, fourth-generation mobile communication system (4 th generation mobile communication system (4G)), fifth-generation mobile communication system (5 th generation mobile communication system (5G)), sixth-generation mobile communication system (6 th generation mobile communication system (6G)), x-th-generation mobile communication system (xth generation mobile communication system (xG)) (xG (x is, for example, an integer, a decimal)), future wireless access (Future Radio Access (FRA)), new wireless access technology (New-Radio Access Technology (RAT)), new wireless (New Radio (NR)), new Radio access (NX), new-generation wireless access (Future generation Radio access (FX)), global system for mobile communication (Global System for Mobile communications (GSM (registered trademark)), 2000, ultra mobile broadband (Ultra Mobile Broadband (UMB)), IEEE 802.11 (IEEE-Fi (registered trademark) 802.16 (Wi) and (registered trademark), bluetooth (20) and other suitable methods based on them, and the like, and the Ultra-WideBand (UWB) can be obtained, multiple systems may also be applied in combination (e.g., LTE or LTE-a, in combination with 5G, etc.).

The term "based on" as used in the present disclosure is not intended to mean "based only on" unless specifically written otherwise. In other words, the recitation of "based on" means "based only on" and "based at least on" both.

Any reference to elements using references to "first," "second," etc. in this disclosure does not fully define the amount or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to a first and second element does not mean that only two elements may be employed, or that the first element must be in some form prior to the second element.

The term "determining" used in the present disclosure is in the case of including various operations. For example, the "judgment (decision)" may be a case where judgment (decision), calculation (calculation), processing (processing), derivation (development), investigation (investigation), search (lookup), search, inquiry (search in a table, database, or other data structure), confirmation (evaluation), or the like is regarded as "judgment (decision)".

The "determination (decision)" may be a case where reception (e.g., reception of information), transmission (e.g., transmission of information), input (input), output (output), access (processing) (e.g., access to data in a memory), or the like is regarded as "determination (decision)".

The "judgment (decision)" may be a case where resolution (resolution), selection (selection), selection (setting), establishment (establishment), comparison (comparison), or the like is regarded as "judgment (decision)". That is, the "judgment (decision)" may be a case where some actions are regarded as "judgment (decision)" to be performed.

Further, "judgment (decision)" may be replaced with "assumption", "expectation", "consider", or the like.

The terms "connected", "coupled", or all variations thereof as used in this disclosure mean all connections or couplings, either direct or indirect, between two or more elements thereof, and can include the case where one or more intervening elements are present between two elements that are "connected" or "coupled" to each other. The bonding or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may be replaced with "access".

In the present disclosure, where two elements are connected, it is contemplated that more than one wire, cable, printed electrical connection, etc. can be used, and electromagnetic energy, etc. having wavelengths in the wireless frequency domain, the microwave region, the optical (both visible and invisible) region, etc. can be used as several non-limiting and non-inclusive examples, to be "connected" or "joined" to each other.

In the present disclosure, the term "a is different from B" may also mean that "a is different from B". In addition, the term may also mean that "A and B are each different from C". Terms such as "separate," coupled, "and the like may also be construed in the same manner as" different.

In the case where "including", "containing", and variations thereof are used in the present disclosure, these terms are meant to be inclusive in the same sense as the term "comprising". Further, the term "or" as used in this disclosure does not mean exclusive or.

In the present disclosure, for example, in the case where an article is appended by translation as in a, an, and the in english, the present disclosure may also include the case where a noun following the article is in plural form.

While the application according to the present disclosure has been described in detail, it is obvious to those skilled in the art that the application according to the present disclosure is not limited to the embodiments described in the present disclosure. The application according to the present disclosure can be implemented as a modification and variation without departing from the spirit and scope of the application defined based on the description of the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not intended to limit the application in any way.

The present application is based on Japanese patent application No. 2021-73616, filed on App. 4/23/2021. This content is incorporated herein in its entirety.

Claims

1. A terminal, comprising:

a receiving unit that receives setting information for a first channel measurement resource related to a first channel measurement resource group and a second channel measurement resource related to a second channel measurement resource group; and

the control unit performs control based on a certain assumption for interference measurement based on a non-zero power channel state information reference signal, NZP CSI-RS, used for a single transmission reception point measurement hypothesis, STRP measurement hypothesis.

2. The terminal of claim 1, wherein,

The control unit envisages that interference measurements based on the NZP CSI-RS for the STRP measurement hypothesis are not supported.

3. The terminal of claim 1, wherein,

the control unit envisages that in addition to being implemented with interference measurements based on the NZP CSI-RS for non-coherent joint transmission measurement assumption, NCJT measurement assumption, interference measurements based on the NZP CSI-RS for the STRP measurement assumption are implemented.

4. The terminal of claim 1, wherein,

the control unit envisages that interference measurements based on the NZP CSI-RS for the STRP measurement hypothesis are activated by being informed of higher layer parameters specifying a shared NZP CSI-RS for an incoherent joint transmission measurement hypothesis, NCJT measurement hypothesis.

5. A wireless communication method for a terminal includes:

a step of receiving setting information for a first channel measurement resource related to a first channel measurement resource group and a second channel measurement resource related to a second channel measurement resource group; and

for interference measurement based on non-zero power channel state information reference signal, NZP CSI-RS, for a single transmission reception point measurement hypothesis, STRP measurement hypothesis, a step of controlling is performed based on a certain assumption.

6. A base station, comprising:

a transmitting unit configured to transmit setting information for a first channel measurement resource related to a first channel measurement resource group and a second channel measurement resource related to a second channel measurement resource group to a terminal; and

the control unit is configured to control the terminal based on a certain assumption for interference measurement based on a non-zero power channel state information reference signal (NZP CSI-RS) used for a single transmission reception point measurement hypothesis (STRP measurement hypothesis).